in the following , similar features in the exemplary embodiments are indicated by the same reference numerals in the different drawings and repeated description thereof is omitted . fig1 shows a schematic perspective view of a brush 1 which is exemplary shown in an embodiment for a hair treatment brush for the application of a colouring mass or any other hair treatment compositions onto hair according to a first embodiment . fig2 and 3 show a top view and a side view , respectively , of the hair treatment brush 1 of fig1 . naturally , the hair treatment brush 1 shown in the figures can also be used for other applications , in particular for painting surfaces . the hair treatment brush 1 includes a handle , which is generally indicated by the reference numeral 2 , and a brush head , which is generally indicated by reference numeral 3 . the handle 2 is for holding the hair treatment brush by a user , in particular by a hair stylist or hair technician , which intends to apply a colouring mass or any other hair treatment compositions onto the hair of a customer . naturally , the hair treatment brush can also be used in a private household but , typically , the main application takes place in commercial hair saloons . the brush head 3 includes a rigid part 30 which serves to fix and hold a number of bundles of bristles 32 , which are situated adjacent to one another basically in the plane that is defined by the largest lateral extension of the rigid part 30 of the brush head 3 . the bristles 32 are intended for the application of the respective colouring mass or any other hair treatment composition which is to be applied to the surface to be treated , in particular to hair . the handle 2 in the embodiment shown in fig1 includes a gripping section 20 which is typically the section in which the user mainly grips the hair treatment brush 1 . this gripping section shows a substantially polygonal cross - section . in the embodiment shown in fig1 , six edges 22 , three of which are shown in the perspective view of fig1 , and six corners 24 , four of which are shown in the perspective view of fig1 , are included in the gripping section 20 . in other words , the polygonal cross - section is a hexagon . the specific polygonal shape of the gripping section 20 of the handle enables the user to receive a haptic feedback from the gripping section as to the rotational orientation of the brush head 3 . in other words , the gripping section 20 of the embodiment shown in fig1 has a basically hexagonal cross - section which can be easily distinguished by the user . however , the polygonal cross - section may be also present in a portion of the gripping section in the longitudinal direction only . however , polygons with a lower or greater number of edges and corners are also contemplated as cross - sections of the gripping sections , in particular tetragons , pentagons , heptagons , octagons and nonagons . however , any other suitable number of edges and corners is contemplated . when choosing an even number of corners of the polygon , however , a symmetrical layout of the gripping section 20 with respect to the brush head 3 can be achieved such that the gripping section 20 delivers a clear feedback with respect to the orientation of the brush head 3 within a 180 ° angle . as the brush head 3 has a substantially symmetrical layout with respect to the plane through the lateral extension of the brush head , a clear distinction within a 180 ° range is sufficient . in particular , it is not important to determine which of the two identical sides of the brush head 3 has a certain rotational orientation , it is rather the general orientation of the brush head that is of interest to the user . the gripping section 20 of the handle 2 has a bulbous portion 26 with a section of maximum diameter 28 . the term “ bulbous portion 26 ” relates to an arrangement in which the handle has one section of a maximum diameter 28 but and all other sections towards both directions of the handle have a respective smaller diameter . the bulbous portion 26 leads to a substantially convex shape of the gripping section 20 along its longitudinal direction . the portion of maximum diameter 28 of the bulbous portion is spaced apart by two thirds of the overall length of the handle 2 including the brush head 3 , excluding the bristles , from the end of the handle 200 that does not carry the brush head . however any other suitable spacing is contemplated , e . g . one half of the overall length . the bulbous portion 26 , in combination with the polygonal cross - section of the gripping section 20 , leads to an improved haptic feedback of the gripping section 20 towards the user . in particular , the user cannot only distinguish the rotational orientation of the brush 1 by means of the edges and corners of the polygon , but can also distinguish the longitudinal orientation of the brush 1 by means of the bulb and the portion of maximum diameter 28 . accordingly , a substantially one - to - one feedback is provided by the gripping section 20 . in addition to that , the provision of the bulbous portion 26 leads to a brush 1 which can be finely balanced , i . e . the weight distribution / mass distribution in the longitudinal direction of the gripping section 20 and , thus , of the brush 1 can be adapted to the needs of a user . by the provision of the bulbous portion 26 the centre of gravity can be shifted further towards that end 200 of the handle 2 that does not carry the brush head 3 . the additional mass provided by the bulbous portion 26 counter - balances the weight of the brush head 3 . as also shown in fig1 to 3 , the handle 2 tapers towards the end 200 which does not carry the brush head 3 . towards this end , the polygonal cross - section of the gripping section 20 smoothly merges into a basically circular cross - section . in other words , the edges 22 and corners 24 smoothly merge into a circular cross - section . the end 200 of the handle 2 , which does not carry the brush head 3 , has , thus , a basically circular cross - section . the end 210 of the handle 2 which carries the brush head 3 also tapers slightly . in the transition zone between the handle and the brush head 3 , two of the corners 24 of the top side ( shown ) as well as two of the corners 24 of the bottom side ( not shown ) of the gripping section 20 merge into one single corner 34 , leading to a basically tetragonal cross - section at the end 210 of the handle 2 which carries the brush head 3 . the merging of the two corners 24 in the direction of the brush head 3 improves the haptic feedback for the user and informs the user of the orientation of the brush head 3 in an unambiguous manner . in the embodiment shown in fig1 to 3 , the gripping section 20 has a cross - section in the form of a polygon that has a larger number of corners than the cross - sections any other portion of the hair treatment brush , in particular more corners than the end 200 of the handle 2 , the end 210 of the handle and the rigid part 30 of the brush head 3 . in particular when comparing fig2 and 3 , the gripping section 20 with the bulbous portion 26 is visible and , additionally , it is shown that two of the corners 24 on the top side as well as on the bottom side merge towards the front end of the hair treatment brush into one single corner 34 . the corner on the side , however , remains basically unchanged until it merges into the circular cross - section towards the end 200 of the hair treatment brush . the rigid part 30 of the brush head 3 is integrally molded with the handle 2 . this rigid part 30 includes a central portion 36 which extends in the plane orthogonal to the plane defined by the lateral extension of the brush head 3 and also extends along the longitudinal direction of the handle 2 . the rigid part 30 of the brush head 3 has its widest extension / thickness in the central portion 36 . in other words , the rigid part 30 of the brush head 3 has a substantially wedge - shaped form , wherein the wedge includes an obtuse angle . the surfaces of the rigid part 30 of the brush head have , thus , a substantially convex shape . this wedge - shaped form of the rigid part 30 of the brush head 3 has the advantage that the color mass or any other hair treatment composition which , during application onto hair , typically remains in the center of the rigid part of a conventional brush head , is deviated or guided towards the lateral sides of the brush head 3 according to the present embodiment , which improves an even distribution of the colouring mass or the other hair treatment composition onto the actual bristles 32 . bristles 32 in the form of bristle bundles are placed adjacent to each other in the plane defined by the rigid portion 30 of the brush head 3 and extend along the longitudinal direction of the handle . fig4 a to 4 e show schematically the respective cross - sections of the hair treatment brush 1 at the respective positions . fig4 a shows a schematic cross - section , in a plane perpendicular to the longitudinal extension of the handle 2 , of the rigid part 30 of the brush head 3 . the substantially wedge - shaped form of the rigid part 30 of the brush head 3 is clearly visible in this representation of the cross section . fig4 b shows a schematic cross - section of the end 210 of the handle 2 in the section in which the two top corners and the two bottom corners have already merged into a single corner 34 . fig4 c shows a schematic cross - section of the gripping section 20 , showing the general polygonal cross - section , in particular the hexagonal cross - section of the gripping section 20 . fig4 d shows the cross - section in the gripping section 20 in a position in which the polygonal cross - section starts to merge into the circular cross - section at the end 200 of the hair treatment brush . fig4 e shows the cross - section of the handle 2 at the end 200 , which does not carry the brush head 3 and clearly shows the circular cross - section . in the representations of fig4 a to 4 e , it becomes clear that only the gripping section 20 has a hexagonal cross - section but the other sections have polygons with a fewer number of corners . fig5 and 6 show perspective views of the brush head 3 as well as the bulbous part 26 of the gripping section 20 and of the transition at the end 210 of the handle towards the rigid part 30 of the brush head 3 . fig7 shows , in a second preferred embodiment , a hair treatment brush 1 ′ including a brush head 3 ′ which includes bristles 32 and which also includes a comb 4 having comb teeth 40 which basically extend in a direction opposite to the extension direction of the bristles 32 . the handle 2 of the hair treatment brush 1 ′ basically resembles the handle 2 as described with respect to the first embodiment above . in particular , a gripping section 20 with a bulbous portion 26 and a substantially hexagonal cross - section is present . in the sections of the handle which are not the gripping section 20 , the cross - sections have fewer corners . in other embodiments contemplated in this respect , the teeth 40 of the comb 4 may extend substantially perpendicular to the longitudinal extension of the handle 2 . however , it is also contemplated that the bristles 32 substantially extend in an angle to the extension of the teeth 40 of the comb . the embodiment shown in fig7 has the advantage of providing the hair stylist with a combined tool for the application of a colouring mass or other hair treatment composition and a combing means in one single hair treatment brush .
the present invention pertains to a brush , in particular for the application of colors , dyes or any other composition onto a surface , in particular onto hair . the brush includes a handle for the brush to be held by a user and a brush head including bristles for the application of colors , dyes or other composition onto the surface , the brush head being connected to the handle . the handle includes at least one gripping section showing a substantially polygonal cross - section .