Patent Publication Number: US-11648700-B2

Title: Skincare device handle with flexible portion

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims benefit from European patent application 20172267.5, filed on 30 Apr. 2020, its content being incorporated herein by reference. 
     FIELD 
     The present disclosure relates to the field of skincare devices, for example shavers, and handles therefor. 
     BACKGROUND 
     Cartridge shavers are known to be provided with mobility between the shaver&#39;s head (or cartridge) and handle using one or more spring-loaded hinges, so as to facilitate contact between the head and skin. An example is International Patent Application WO2016020009 which discloses a razor handle comprising an elongated body extending in a longitudinal direction, the elongated body having an outer surface and being provided with a first hole opening on the outer surface, the razor handle further comprising an element provided within the first hole, the element being integral with the elongated body and having a shape that is different from the shape of the first hole. Further, connecting means are disclosed which are integral with the elongated body that comprises two flexible arms extending from the elongated body and protruding toward a free end at the front end of the razor handle. Each arm further has on its upper face a plurality of small cavities. However, conventional techniques for enabling mobility of a head with respect to a handle of a skincare device greatly increase skincare device complexity and cost. Therefore, a need exists to avoid such a complexity and costs. 
     SUMMARY 
     According to examples of the present disclosure, a handle may be provided, which is suitable for a shaver. The handle includes a manipulation portion, a connection portion configured to connect to a razor cartridge, and a first flexible portion connecting the manipulation portion to the connection portion. The first flexible portion includes one or more deformation cells of one or more predetermined shapes between the manipulation portion and connection portion. 
     Such a handle may allow the connection portion to move relative to the manipulation portion, in directions and/or ranges that are based on the deformation cells. 
     The first flexible portion may include a longitudinal tubular portion, including a cavity delimited by an upper wall, a lower wall, and two lateral walls. The upper wall may be opposite to the lower wall, the two lateral walls may be opposite to each other, and connect the upper and the lower walls together. The upper and lower sides may be on opposite sides with regard to a shaving direction. 
     A longitudinal tubular portion may be a tubular portion having an axis, the axis extending along a longitudinal direction/axis of the handle. 
     The shaving direction may be a direction, substantially perpendicular to the longitudinal direction of the handle, along which the razor is moved in order to shave. 
     The upper wall may be disposed on an upper side of the handle, while the lower wall may be disposed on a lower side of the handle. 
     The one or more deformation cells are arranged as one or more first deformation cells included on the upper wall. Additionally or alternatively, the one or more deformation cells are arranged as one or more second deformation cells included on the lower wall. 
     At least one first deformation cell may include a through hole extending transversely through the upper wall. 
     At least one second deformation cell may include a blind hole opening within the cavity. 
     The first deformation cells and/or the second deformation cells may have a quadrilateral cross section. 
     The axes of the holes of the first and/or second deformation cells may be substantially parallel to the shaving direction. 
     The number of first deformation cells may be equal to the number of second deformation cells. 
     The first deformation cells may be coaxial with the second deformation cells. 
     The tubular portion may include a transverse interior wall connecting at least the upper and the lower walls to each other. 
     The interior wall may divide the cavity into two or more third deformation cells which extend transversely to a longitudinal axis of the handle, between the lateral walls of the tubular portion. 
     The first flexible portion may include at least two first and/or two second deformation cells offset in opposite directions from each other with respect to the interior wall. 
     The connection portion and/or the manipulation portion may be made of a first material, and the first flexible portion may include a second material, different from the first material. The first material may include an ABS-like photopolymer resin. The second material may include a rubber-like photopolymer resin. 
     The second material may be more elastic than the first material. 
     The handle may include a release portion including at least a second flexible portion arranged between the first flexible portion and an attachment point of the connection portion for attachment of the razor cartridge to the connection portion. 
     The connection portion may be detachable from the razor cartridge by deflecting the at least a second flexible portion away from a rest position of the at least a second flexible portion. 
     The second flexible portion may include a living hinge connecting the attachment point to the first flexible portion. 
     The second flexible portion may include an elastomeric element configured to bias the living hinge of the second flexible portion towards the rest position. 
     A living hinge is a region of material joining two other regions of the same material, which is both thinner and more flexible than the regions it joins. 
     A distance between hole axes of neighboring deformation cells may be between 3.5 and 5.5 mm (millimeters), inclusive. 
     The first flexible portion may be configured to allow a bending movement of the connection portion relative to the manipulation portion about a first axis, and also a torsional movement of the connection portion relative to the manipulation portion about a second axis perpendicular to the first axis. 
     The second axis may be parallel to a longitudinal axis of the manipulation portion. 
     Additionally or alternatively, a skincare device may be provided, including a handle as described earlier herein. The skincare device may include a razor cartridge configured to be removably or fixedly attached to the handle. 
     Additionally or alternatively, a process of manufacturing a handle according as described earlier herein may be provided. The process includes providing the manipulation and connection portions, and fabricating the first flexible portion. The step of fabricating the first flexible portion includes additively-manufacturing at least the first flexible portion. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure may be more completely understood in consideration of the following detailed description of aspects of the disclosure in connection with the accompanying drawings, in which: 
         FIG.  1    shows an exemplary skincare device; 
         FIG.  2    shows an exemplary first flexible portion visible in  FIG.  1   ; 
         FIG.  3    shows the first flexible portion of  FIG.  2    along cut plane III-III; 
         FIG.  4    shows the first flexible portion of  FIG.  2    along cut plane IV-IV; 
         FIG.  5    shows an exemplary variant of the skincare device of  FIG.  1   ; 
         FIG.  6    shows a sectional view of the skincare device of  FIG.  5   . 
     
    
    
     The term “exemplary” is used in the sense of “example,” rather than “ideal.” While aspects of the disclosure are amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit aspects of the disclosure to the particular embodiment(s) described. On the contrary, the intention of this disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure. 
     DETAILED DESCRIPTION 
     As used in this disclosure and the appended claims, the singular forms “a”, “an”, and “the” include plural referents unless the content clearly dictates otherwise. As used in this disclosure and the appended claims, the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise. 
     The following detailed description should be read with reference to the drawings. The detailed description and the drawings, which are not necessarily to scale, depict illustrative aspects and are not intended to limit the scope of the disclosure. The illustrative aspects depicted are intended only as exemplary. 
     When an element or feature is referred to herein as being “on,” “engaged to,” “connected to,” or “coupled to” another element or feature, it may be directly on, engaged, connected, or coupled to the other element or feature, or intervening elements or features may be present. In contrast, when an element or feature is referred to as being “directly on,” “directly engaged to,” “directly connected to,” or “directly coupled to” another element or feature, there may be no intervening elements or features present. Other words used to describe the relationship between elements or features should be interpreted in a like fashion (for example, “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). 
     Although the terms “first,” “second,” etc. may be used herein to describe various elements, components, regions, layers, sections, and/or parameters, these elements, components, regions, layers, sections, and/or parameters should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or section from another region, layer, or section. Thus, a first element, component, region, layer, or section discussed herein could be termed a second element, component, region, layer, or section without departing from the teachings of the present disclosure. 
       FIG.  1    shows an exemplary skincare device  1 —in this case an exemplary disposable shaver. The shaver includes an upper side which is arranged towards the viewer, and a lower side which is arranged away from the viewer. The shaver includes a handle  2  permanently connected to a head  3 . The head  3  is provided as a cartridge housing one or more blades. In a conventional manner, during shaving, when the cartridge is maneuvered in a shaving direction  4  while in contact with skin, the blade(s) may cause hair growing from the skin to be cut. 
     The handle  2  includes a connection portion  5 , including at least one—in this case two—attachment points  6 ,  7  for directly connecting to the head  3 . During shaving, the head  3  is arranged between the attachment points  6 ,  7  and the skin being shaved. The attachment points  6 ,  7  may rigidly or pivotably connect the head  3  to the handle  2 . 
     The handle  2  includes a manipulation portion  8  which is connected to the connection portion  5  by way of a first flexible portion  9 . The manipulation portion  8 , first flexible portion  9 , and connection portion  5  of the handle  2  are arranged along a longitudinal axis  10  of the handle, with the first flexible portion on the longitudinal axis between the manipulation and connection portions. 
     Each attachment point  6 ,  7  is mounted on the end of an arm  11 ,  12  extending from the first flexible portion  9 . The two attachment points&#39; arms  11 ,  12  are jointed together at a common trunk  13  which is attached to the first flexible portion  9 . 
     The manipulation portion  8  may include one or more fingertip placement features  14 , such as indentations, for a user to place his/her fingertip(s) during shaving. In this way, the user may be dissuaded from gripping the first flexible portion  9 . 
     The first flexible portion  9  is directly connected to the manipulation portion  8  and directly connected to the connection portion  5 . The first flexible portion  9  allows a bending movement of the connection portion  5  relative to the manipulation portion  8  in the shaving direction  4 , and also a torsional movement of the connection portion  5  relative to the manipulation portion  8  about the longitudinal axis  10 . 
     The manipulation  8  and connection portions  5  are made of a relatively rigid material, for example an ABS-like photopolymer resin or a polypropylene-like photopolymer resin. Digital ABS, available from Stratasys, is a non-limiting example of an ABS-like photopolymer resin. Durus (such as Durus White) and Rigur, available from Stratasys, are non-limiting examples of polypropylene-like photopolymer resins. The first flexible portion  9  is made of a relatively flexible material, such as a rubber-like photopolymer resin. The rubber-like photopolymer resin may have a shore hardness of 40-85, or even 60 for example. Tango and Agilus30, available from Stratasys, are non-limiting examples of rubber-like photopolymer resins. Forces applied to the handle  2  during shaving may deform the first flexible portion  9  more than the manipulation  8  and connection 5 portions. The material of the first flexible portion  9  may additionally be relatively resilient compared to the material of the manipulation  8  and/or connection 5 portions. 
     The first flexible portion  9  includes one or more deformation cells, which may favor deformation of the first flexible portion during shaving in response to shaving forces. The deformation cells are arranged between the manipulation  8  and connection 5 portions. 
       FIG.  2    shows the first flexible portion  9  visible in  FIG.  1   . The first flexible portion  9  includes a tubular portion arranged to extend substantially along the longitudinal axis  10  of the handle. The tubular portion includes an upper wall  15  which is disposed on an upper side of the handle, and a lower wall  16  which is disposed on a lower side of the handle. The upper and lower sides of the handle are on opposite sides of the handle with regard to the shaving direction  4 . 
     The tubular portion includes two lateral walls  17 ,  18  which connect the upper and lower walls together. 
     The tubular portion may additionally include an axial wall  19  arranged towards the manipulation portion and configured to be directly connected thereto, and/or an axial wall  20  arranged towards the connection portion and configured to be directly connected thereto. 
       FIG.  3    shows the first flexible portion  9  of  FIG.  2   , cut along plane III-III. The tubular portion includes a cavity  21  delimited by the upper  15  and lower  16  walls, and by the two lateral walls  17 ,  18 . 
     The upper  15  and lower  16  walls are on opposite sides of the cavity  21  from one another. The upper  15  and lower  16  walls extend between the lateral walls  17 ,  18  in a direction that is substantially perpendicular to the shaving direction  4 . For example, a point  31  of the junction between the upper wall  15  and the left lateral wall  18  which is closest to the connection portion, and a point J 2  of the junction between the upper wall  15  and the right lateral wall  17  which is closest to the connection portion may define a line L 1  which is at an angle of more than 45° (degrees) and less than 135° with respect to the shaving direction. The same may be true with regard to a line L 2  defined by a point J 3  of the junction between the upper wall  15  and the left lateral wall  18  which is closest to the manipulation portion, and a point J 4  of the junction between the upper wall  15  and right lateral wall  18  which is closest to the manipulation portion. For example, the same may also be true for a line L 3  defined by a point J 5  of the junction between the lower wall  16  and the right lateral walls  17  which is closest to the manipulation portion, and a point J 6  of the junction between the lower wall  16  and the left lateral wall  18  which is closest to the manipulation portion. The same may also be true for a line L 4  defined by a point J 7  of the junction between the lower wall  16  and the right lateral wall  17  which is closest to the connection portion, and a point J 8  of the junction between the lower wall  16  and the left lateral wall  18  which is closest to the connection portion. 
     The two lateral walls  17 ,  18  are on opposite sides of the cavity  21  from one another. The lateral walls  17 ,  18  extend from the upper wall  15  to the lower wall  16  in a direction that is substantially parallel to the shaving direction  4 . For example, points J 2  and J 7  may define a line L 5  which is at an angle of more than 135° and less than 45° with respect to the shaving direction. The same may be true for a line L 6  defined by points J 1  and J 8 . For example, the same may also be true for a line L 7  defined by points J 4  and J 5 . The same may be true for a line L 8  defined by points J 3  and J 6 . 
     The tubular portion may include an interior wall  22  which is arranged transverse to the longitudinal axis  10  of the handle, and intermediate surfaces (axial wall  19  and axial wall  20 ) of the first flexible portion  9  which are directly connected to the manipulation and connection portions, respectively. The interior wall  22  connects at least the upper  15  and lower  16  walls (or in this case the upper and lower walls, and both lateral walls  17 ,  18 ) of the tubular portion to each other. The interior wall  22  may limit or even prevent collapse of opposing walls (for example the upper  15  and lower  16  walls) of tubular portion towards each other during deformation of the first flexible portion  9 . 
     The one or more deformation cells may include one or more first deformation cells arranged in the upper wall  15 . Each first deformation cell  23 - 28  may be provided as a through hole extending transversely through the upper wall  15 . In the example illustrated here, six first deformation cells are provided, of which three — 23 ,  24 ,  25 —are shown in section and form a first row of first deformation cells, and three — 26 ,  27 ,  28 —are shown in their entirety and form a second row of first deformation cells. 
     When multiple rows are provided, the rows are arranged in series along the longitudinal axis  10 . The multiple rows may be provided at intervals of 3.5-5.5 mm (millimeters) for example. In the example illustrated here, the first and second rows are provided at an interval of 4.5 mm along the longitudinal axis  10 . When three or more rows are present, the rows may be provided at regular or varying intervals along the longitudinal axis  10 . 
     The row of first deformation cells nearest to the connection portion may be provided at a distance therefrom of 2.3-3.5 mm as measured along the longitudinal axis. In the example illustrated here, the first row of first deformation cells is arranged at a distance of 2.90 mm from the connection portion, as measured along the longitudinal axis. 
     The row of first deformation cells nearest to the manipulation portion may be provided at a distance therefrom of 2.5-3.8 mm as measured along the longitudinal axis. In the example illustrated here, the second row of first deformation cells is arranged at a distance of 3.20 mm from the manipulation portion, as measured along the longitudinal axis. 
     Although the example illustrated here includes two rows of first deformation cells, it is contemplated to provide as few as one row containing one or more first deformation cells, or as many as five or more rows containing one or more first deformation cells. When two or more rows of first deformation cells are provided, the number of first deformation cells the rows may be identical to or different from each other. 
     Although each row is shown as having three first deformation cells arranged in series from one to the other of the lateral walls  17 ,  18 , it is also contemplated for a given row to contain as few as one first deformation cell extending from one to the other of the lateral walls  17 ,  18 . When a given row includes multiple first deformation cells, the row&#39;s first deformation cells may be arranged in series from one of the lateral walls  17 ,  18  to the other. The row&#39;s first deformation cells may be provided at intervals of 3.2-4.8 mm for example. When a given row includes three or more first deformation cells, the cells may be provided at regular or varying intervals. In the example illustrated here, each row&#39;s corresponding deformation cells are provided at intervals of 4.00 mm in series from the left lateral wall  18  to the right lateral wall  17 . 
     When the interior wall  22  is present, at least two of the first deformation cells  23 - 28  may be offset from the interior wall in opposite directions from each other. For example, the three first deformation cells  23 - 25  shown in section are offset to be intermediate the interior wall  22  and the connection portion when the first flexible portion  9  is directly connected thereto, whereas the three first deformation cells  26 - 28  shown in their entirety are offset to be intermediate the interior wall  22  and the manipulation portion when the first flexible portion  9  is directly connected thereto. 
     The one or more deformation cells may also include one or more second deformation cells provided in the lower wall  16 . Each second deformation cell may be provided as a blind hole in the lower wall  16  which opens towards and into the cavity  21 . Use of blind holes in the lower wall  16  may increase the life of the first flexible portion  9 , compared to through holes. 
     For example, three second deformation cells — 29 ,  30 ,  31 —are shown in section, which are coaxial to the three first deformation cells shown in section  23 - 25 . 
       FIG.  4    shows the first flexible portion  9  of  FIG.  2    along cut plane IV-IV. The number of second deformation cells  30 ,  31 ,  33 ,  34  may be equivalent to the number of first deformation cells  24 ,  25 ,  27 ,  28 . When the interior wall  22  is present, at least two of the second deformation cells  30 ,  31 ,  33 ,  34  may be offset from the interior wall in opposite directions from each other. 
     The deformation cells have predetermined shapes, which may help to authorize one or more predetermined movements of the connection portion with respect to the manipulation portion. For example, the deformation cells may authorize the bending described above, and possibly also torsion of the connection portion with respect to the manipulation portion about an axis extending from the manipulation portion towards the head (for example the longitudinal axis  10 ). 
     For example, the first and second deformation cells are shown as having substantially quadrilateral cross-sections with respect to their respective holes&#39; axes  35 . In the example illustrated here, the cross-section is delimited by an equilateral quadrilateral with a side length of 2.00 mm as measured within the plane of the cross-section, though side lengths of 1.6-2.4 mm are also contemplated. Other polygonal cross-sections are also contemplated, including triangular or hexagonal cross-sections. Non-polygonal forms are also contemplated, including circular, oval and elliptical cross-sections, or even cross-sections composed delimited by combinations of at least one curve and at least one line-segment. 
     The axes  35  of the holes of the first and second deformation cells are arranged substantially parallel to the shaving direction  4 . For example, each axis may be arranged at an angle of less than 45° and more than 135° with respect to the shaving direction. The first and second deformation cells&#39; holes&#39; axes  35  may be arranged to extend between the upper  15  and lower  16  walls of the tubular portion. The first (and when present second) deformation cells guide the aforementioned bending of the connection portion  5  relative to the manipulation portion  8 . 
     The interior wall  22 , when present, divides the cavity into two third deformation cells  36 ,  37  which extend transversally to the longitudinal axis  10  of the handle, between the lateral walls of the tubular portion. The third deformation cells  36 ,  37  may be concealed between the upper wall, lower wall, and lateral walls of the tubular portion. The third deformation cells  36 ,  37  guide the aforementioned torsion of the connection portion  5  relative to the manipulation portion  8 . It is also contemplated to provide multiple interior walls, so as to divide the cavity into three or more third deformation cells. The third deformation cells  36 ,  37  may additionally contribute to guiding the aforementioned bending. 
     Each third deformation cell  36 ,  37  may extend 2.3-3.5 mm along the longitudinal axis. Although, in the example illustrated here, the third deformation cell  37  nearest to the manipulation portion extends 2.83 mm along the longitudinal axis, as does the third deformation cell  36  nearest to the connection portion, it is also contemplated for any two third deformation cells to extend different by amounts along the longitudinal axis. 
     The cavity may have a height at its nearest extent to the manipulation portion, as measured from the upper wall  15  to the lower wall  16  of 3.3-4.9 mm, for example 4.11 mm. The cavity may have a height at its nearest extent to the connection portion of 1.0-1.6 mm, for example 1.33 mm. The third deformation cell  37  nearest the manipulation portion may have a height, as measured from the upper wall  15  to the lower wall  16 , at its nearest extent to the connection portion, of 2.5-3.7 mm, for example 3.15 mm. The third deformation cell  36  nearest the connection portion may have a height at its nearest extent to the manipulation portion of 2.0-3.0 mm, for example 2.51 mm. 
     The interior wall(s)  22  may be arranged at regular intervals along the longitudinal axis between the between the manipulation portion and the connection portion. In the example illustrated here, the interior wall  22  is halfway between the manipulation and connection portions, as measured along the longitudinal axis. 
     All of the herein disclosed ranges of parameters for the arrangement of deformation cells within the first flexible portion  9  may be suitable for conferring mobility thereto in bending and/or in torsion. The example illustrated here further provides for enhanced behavior in terms of restoration of the first flexible portion from a deflected position to a rest position when the head of the skincare device is removed from contact with skin. 
       FIG.  5    shows an exemplary skincare device  101 —in this case an exemplary a refillable variant of the skincare device  1  shown in  FIG.  1   . Because it is refillable, the variant shown in  FIG.  5    includes a handle  102  and a head  103  which are detachable from one another, such that the head may be replaced while conserving the handle. Reference numerals common to the variant illustrated in  FIG.  5    and the variant illustrated in  FIG.  1 - 4    designate identical features. 
     As with the handle  2  seen in  FIG.  1   , the handle  102  seen in  FIG.  5    includes a manipulation portion  8 , at least a first flexible portion  9 , and a connection portion  105 . The manipulation portion  8  and first flexible portion  9  are identical to those discussed earlier herein. 
     The connection portion  105  includes two attachment points  6 ,  7  mounted on arms  111 ,  112  extending from a common trunk  113 . The trunk  113  is directly connected to the first flexible portion  9 . 
     A release portion is provided intermediate the first flexible portion  9  and at least one of the attachment points  106 ,  107 . A user may move the release portion to detach the head  103  from the handle  102 . 
     The release portion includes at least a second flexible portion  139 ,  140  arranged on a first of the two arms  111 . The second flexible portion  139  authorizes lateral movement of the attachment point  6  of the first arm  111  with respect to the attachment point  7  of the second of the two arms  112 . As seen here, the second arm  112  may also be provided with its own second flexible portion  140 . 
     Deflecting the second flexible portion(s)  139 ,  140  away from its/their rest position(s) may authorize or cause detachment of the head  3  from the attachment point(s)  6 ,  7 . 
     Each second flexible portion  139 ,  140  includes a living hinge  141  provided in the arm  111 ,  112 . The living hinge  141  is provided between the trunk  113  and the attachment point  6 ,  7 , such that the attachment point is connected to the trunk via the living hinge of the second flexible portion. Each living hinge  141  is an elastically deformable neck of its corresponding arm  111 ,  112 . 
     The second flexible portion  139 ,  140  includes an elastomeric element  142 , which may be configured to bias the living hinge  141  towards its rest position. In the rest position, the attachment points  6 ,  7  are positioned relative to each other such that the head  3  may be retained to the handle  102 . The elastomeric element  142  may be provided with a different color from the remainder of its respective second flexible portion  139 ,  140  serve as a visual indicator to a user of where deflection of the second flexible portion  139 ,  140  is to occur, and/or may provide a region presenting relatively higher friction on the user&#39;s fingertip, with respect to the remainder of the second flexible portion  139 ,  140 , to facilitate application of deflecting forces. 
     The living hinge  141  may return to its rest position when a user no longer applies forces to deflect the second flexible portion  139 ,  140 . 
     The elastomeric element  142  may be provided as an elastomeric layer on the living hinge  141 . The elastomeric layer may even be arranged on all sides of the living hinge  141 , for example to apply restoring forces along multiple axes. 
     As a non-limiting example, the elastomeric element  142  may be made of the same material as the first flexible portion  9 . 
     The elastomeric element  142  may be provided with a different color than the trunk  113  and/or attachment point  106 ,  107 , to serve as a visual indicator to a user of where the arm  111 ,  112  will bend during deflection. 
     The handles  2 ,  102  as described earlier herein may be manufactured by providing the manipulation portion  8  and connection portion  5 ,  105 , and by additively-manufacturing the first flexible portion  9 , for example by 3D-printing. As a non-limiting example, the manipulation portion  8  and/or the connection portion  5 ,  105  may be provided using conventional manufacturing techniques, such as molding. Alternatively, a non-limiting example, the manipulation portion  8  and/or connection portion  5 ,  105  may also be provided through additive manufacturing, possibly concurrently with the first flexible portion  9 . When the handle  2 ,  102  includes a second flexible portion  139 ,  140 , the elastomeric element  142  thereof may also be provided through additive manufacturing, possibly concurrently with fabrication of the first flexible portion  9 . “Additive manufacturing” is understood to include joining materials to make objects from three-dimensional model data, typically through application of multiple layers of one or more materials upon each other. Non-limiting examples of additive manufacturing include 3D Printing, stereolithography, and the like. 
       FIG.  6    shows a sectional view of the second arm  112  of the connection portion  105  visible in  FIG.  5   . The second arm  112  terminates, at an extremity opposite from the manipulation portion  8  in an attachment point  7  configured to cooperate with the head  3 . The head  3  includes a cylindrical (and in this case convex) guide surface  42  terminating in a slot  40  on the upper side of the skincare device  101 . The slot  40  includes a surface arranged to extend radially away from and parallel to the cylindrical axis of the guide surface  42 . 
     The attachment point  7  includes a slider  50  configured to penetrate in the slot  40 , with a corresponding cylindrical (and in this case concave) contact surface  52  configured to contact the guide surface  42  slidingly. Abutment of the slot  40  and slider  50  limits pivoting of the head  3  with respect to the connection portion  105 . 
     The slider  50  terminates in a protrusion  54  on the lower side of the skincare device  101  extending radially towards the cylindrical axis of the contact surface  52 . The head  3  includes a corresponding stopper  44  arranged on the lower side of the skincare device  101 . Abutment of the protrusion  54  and stopper  44  limits pivoting of the head  3  with respect to the connection portion  105 . 
     To retain the guide surface  42  and contact surface  52  to one another, the head  3  includes a hook-shaped retainer  46  configured to extend radially with respect to the cylindrical axis of the guide surface  42  towards the connection portion  105 , beyond the contact surface  52 . 
     Returning now to  FIG.  5   , it can be seen that the attachment point  7  includes a corresponding rail  56  presenting a cylindrical surface on which the retainer may rest slidingly. Such cooperation between the head  3  and connection portion  105  may also be seen with regard to the first arm  111 , where analogous features are provided. 
     The rail  56  may be substantially flat in a direction parallel to its cylindrical axis. As an arm  111 ,  112  is moved perpendicular to the longitudinal axis  10  during deflection of its corresponding second flexible portion  139 ,  140 , the arm&#39;s attachment point  6 ,  7  slides substantially parallel to the cylindrical axis of its corresponding rail  56  until it is no longer in contact with its corresponding retainer  46 . The head  3  is thus released from the attachment point  6 ,  7 . 
     Although the described embodiments were provided as different exemplary embodiments, it is envisioned that these embodiments are combinable or, when not conflicting, the features recited in the described embodiments may be interchangeable. Moreover, the features recited in the described embodiments are not inextricably linked to one another, unless such a linkage is clearly indicated between two given features. 
     Throughout the description, including the claims, the term “comprising a” should be understood as being synonymous with “comprising at least one” unless otherwise stated. In addition, any range set forth herein, including the claims should be understood as including its end value(s) unless otherwise stated. Specific values for described elements should be understood to be within accepted manufacturing or industry tolerances known to one of skill in the art, and any use of the terms “substantially” and/or “approximately” and/or “generally” should be understood to mean falling within such accepted tolerances. 
     Although the present disclosure herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present disclosure. 
     It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.