JP2018134394A - Twisted brush, and method and apparatus for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve handling of a twisted brush and simplify manufacturing of the brush.SOLUTION: A twisted brush 1 includes one bristle carrier 2 comprising multiple wire portions 3 being twisted to one another. The wire portions each have an oval cross section and/or an elliptical cross section at least in the distal portion 4 of the bristle carrier. Further, the bristle carrier has a drawing prevention part 12 arranged at intervals from the proximal end 11 thereof. The bristle carrier can be fixed to a gripper 7 of the twisted brush and can prevent drawing through this drawing prevention part. Further, at least one of the multiple wire portions is formed, at least two areas including different cross sections, respectively, are provided, respective wire portions are twisted to one another, and the bristle carrier is formed.SELECTED DRAWING: Figure 13

Description

  The present invention is a torsion brush, in particular a mascara brush or an interdental brush, comprising a bristle carrier consisting of at least two wire parts twisted together, with a bristle formed on the distal part of the bristle carrier Related to what is.

  The invention further relates to a method for producing a torsion brush with a bristle carrier comprising at least two twisted wire segments, in particular of the type described above, and also to the manufacture of a brush for producing a torsion brush of the type described above. Related to the machine.

  Torsion brushes are well known in the various embodiments from the prior art and are used as so-called interdental brushes, especially in the dentistry field, and as so-called mascara brushes in the cosmetics field.

  The problem imposed on the present invention is to improve the handling of torsion brushes and to simplify the production of such brushes.

  In order to solve this problem, a brush having the means and features described in claim 1 is first proposed. According to this, in particular, it is assumed that at least one wire portion of at least two wire portions of the torsion brush has at least two regions each having a different cross section. In this case, the different cross-sections may be formed differently or identically and may have different sizes. That is, in one of the wire portions, a region forming the proximal portion of the bristle carrier may be provided with a cross section particularly suitable for attaching a gripping part to the bristle carrier, for example. In the region of at least one wire part, for example forming the distal part of the bristle carrier, the wire part has particularly positive properties with regard to the attachment of the bristle on the bristle carrier and / or the brush can pass through It may have a cross section that results in a particularly small pore diameter. In particular, the small passable hole diameter is worth pursuing torsional brushes which are used as interdental brushes and should also be inserted into small interdental spaces. For this purpose, oval and / or elliptical cross sections are particularly suitable.

  With respect to the present invention, the plurality of regions having different cross sections of the wire portion may mean a plurality of regions infinitely small in one wire portion.

  Thereby, in particular, handling of the torsion brush as described above can be simplified. This is especially the case when the torsion brush is used as an interdental brush to be inserted into the interdental space with the distal portion of its bristle carrier.

  It is also advantageous if at least one of the at least two wire portions already has at least two regions with different cross sections before twisting each wire portion to form the bristle carrier. obtain. In this way it is possible to avoid post-deformation processing of the hair carrier, which in some cases is not sufficiently precise.

  In order to improve the handling of a torsion brush of the type mentioned at the outset, which is used in particular as an interdental brush to be inserted into the interdental space with the distal part of the bristle carrier, means and features according to claim 2 are provided. Also proposed is a brush with. In particular, a brush is proposed in which each wire part forming the bristle carrier has an oval and / or elliptical cross section at least in the region forming the distal part of the bristle carrier.

  It will be noted here that the features of the independent claims 1 and 2 may be combined particularly advantageously. Thus, for example, the bristle carrier can provide an optimized torsion brush on the one hand with respect to the attachment of the grip on the bristle carrier and on the other hand with respect to the smallest hole diameter that can be passed.

  By using a wire part with an elliptical and / or oval cross section at least in the distal part of the hair carrier, the hair is compared to a conventional hair carrier formed, for example, from a wire part with a circular cross section. The outer dimension or outer diameter of the distal portion of the carrier will be reduced. By minimizing the outer dimensions of the distal portion of the bristle carrier, a smaller minimum passable hole diameter of the brush is formed compared to conventional brushes. In other words, the brush according to the present invention can be more easily inserted into, for example, a narrow interdental space at least in comparison and stability of the brush. This is desirable for comfortably handling such a torsion brush as an interdental brush.

  By using a wire part with an oval or elliptical cross section, the individual filaments of the bristle material sandwiched between the two wire parts when the two wire parts are twisted together are each twisted together. It will be better applied directly to the outer surface of the. The improved application of the individual bristle filaments to the outer surface of each wire part twisted together is that each wire part twisted together is positioned so as to oppose each other with its elliptical cross section and then twisted together. So that one of the two vertices on the minor axis of the elliptical cross section of one wire part is one on the minor axis of at least one other wire part with an elliptical cross section. This is particularly good when facing one vertex.

  The use of a wire portion having such an oval cross section and / or an elliptical cross section in the proximal portion of the bristle carrier also facilitates attachment of the gripping portion in the proximal portion of the bristle carrier be able to. This is especially the case when the gripping part is injection molded on the proximal part of the bristle carrier.

  The object is also solved by a brush having the means and features of claim 3. This brush is particularly advantageous in that the bristle carrier has a pull-out prevention part spaced from its proximal end. Via the pull-out prevention part, the bristle carrier can be securely fixed to a gripping part that can be arranged or arranged in the proximal part of the bristle carrier. In this way, the bristle carrier can be prevented from unintentionally coming off the gripping part during use of the brush. The use of the pull-out prevention part arranged in this way is particularly advantageous when the gripping part of the torsion brush is injection-molded on the proximal part of the bristle carrier. The pull-out prevention part has a predetermined interval with respect to the proximal end part of the bristle carrier. Thus, the hair carrier may be relatively slender at its proximal portion. This makes it possible to provide a slender grip on the proximal part of the bristle carrier. In the brush according to the present invention, a relatively small amount of material for the gripping portion may be used in the proximal portion of the bristle carrier. In this case, the pull-out prevention part may be moved to a region located between the hair braid and the proximal portion of the hair carrier.

  At least one, preferably all of each of the wire portions that are each twisted together to form a bristle carrier, has at least two regions with differently shaped cross sections. And can be reasonable. In this case, the pull-out prevention part is a cross-sectional change along the longitudinally extending part of the bristle carrier resulting from a plurality of different cross-sections of at least one wire part in each wire part twisted together. It may be formed by a part.

  It can be advantageous if a plurality or all of the wire segments have the same contour, i.e. the same region with different cross sections.

  That is, for example, a plurality of wire portions each having a round, circular, oval or elliptical cross section in one area and having a cross section different from the above cross sections in adjacent areas are provided. It is possible to use. Two such wire segments, each having a similar cross-section, are aligned and then twisted to produce a bristle carrier having at least one cross-sectional variation along the longitudinal extension. It should be pointed out here that the cross section of the hair carrier may also mean the cross section of the virtual envelope of the hair carrier.

  The hair carrier may have an intermediate portion between its distal and proximal portions. A proximal step portion may be formed between the intermediate portion and the proximal portion as a pull-out preventing portion. Through this proximal step, the gripping part of the torsion brush can be connected in shape connection (eg constrained by shape, eg engagement) with the bristle carrier and may be connected in use. This is especially the case when the injection molding material is injected so as to surround the proximal portion of the bristle carrier to form the grip.

  In this connection, the outer dimension, which is measurable in the spatial direction transverse to the longitudinal extension of the bristle carrier, to form a pull-out prevention part, which the bristle carrier has in its middle part, It may be advantageous if the outer part of the bristle carrier is smaller than the outer dimension measured in the same spatial direction at the position. In each dimension as described above in the proximal part of the bristle carrier and in the intermediate part adjacent to it, the pull-out prevention provided in this way ensures a particularly reliable shape of the grip in the proximal part of the bristle carrier. Connective fixation can be achieved.

  Furthermore, the bristle carrier can have a distal step between the intermediate part and the distal part. In order to form such a distal step between the intermediate part and the distal part, the outer dimension of the intermediate part of the hair carrier measurable in a spatial direction transverse to the longitudinal extension of the hair carrier May be smaller or larger than the outer dimension of the distal portion of the hair carrier measured in the same spatial direction. The distal step can be used as a positioning aid for injection molding a grip on the proximal portion of the bristle carrier, for example, against an injection mold.

  Each wire portion may also have a circular or oval or oval or semi-circular cross section, at least partially in the region forming the proximal portion of the bristle carrier. It may be advantageous to use a wire part having a region with a semicircular cross section that forms the proximal part of the bristle carrier, in particular for injection molding the gripping part on a mascara brush. In this way, at least two wire portions are each brought into contact and twisted together, preferably on a flat side that is not curved, so that a virtual envelope surrounds both wire portions in contact with each other as described above. The vacant area or free area corresponding to the difference in area between the cross-sectional area of the wire and the sum of the cross-sectional areas of the respective wire portions in contact with each other can be particularly reduced.

  If the injection molding material is also injected around the middle part of the bristle carrier to form a grip on the proximal part of the bristle carrier, the region of the wire part forming the middle part of the bristle carrier will be half It may be advantageous to have a circular cross section. In this way, the minimization of the free area defined above also occurs in the middle part of the hair carrier. It should be pointed out that in this case the two wire parts twisted together to form the intermediate part are facing each other, preferably on the flat side, preferably not curved, of a semicircular cross section. Thus, the desired minimization of the free area is achieved.

  The wire portion has a circular, oval or oval cross section in the proximal portion of the bristle carrier, while the wire portion has the semicircular cross section described above in the middle portion of the bristle carrier. Can be particularly advantageous. This allows a particularly steep geometric transition to be formed in the form of a step between the intermediate part and the proximal part of the bristle carrier, which is later attached to the torsion brush Or pulling out of the hair carrier from the injection-molded gripping part can be reliably prevented.

  In order to minimize the hole diameter that the brush can pass through, i.e. the dimension that the brush according to the invention can barely pass through with its distal part, the region of the wire part forming the distal part of the bristle carrier, in particular the far The lateral region may have an oval cross section and / or an elliptical cross section. It should be pointed out that the wire portions twisted together at the distal portion of the bristle carrier may face each other with one apex on the minor axis of their elliptical cross section. In this way, the outer diameter or outer dimension of the distal portion of the bristle carrier can be kept particularly small and the minimum hole diameter that the torsion brush can pass through can be minimized.

  The gripping part of the torsion brush already described above may be attached to the bristle carrier so as to at least partly surround the proximal part and the pull-out prevention part, and in particular may be injection molded around the bristle carrier. . The gripping part is attached to the hair carrier, in particular injection molded around the hair carrier, so as to at least partially surround the proximal step and at least part of the middle part of the hair carrier. Can be particularly advantageous.

  Basically, it is conceivable to use at least two separate wire segments for the formation of the bristle carrier. However, particularly when the brush according to the present invention is used as an interdental brush, it is advantageous that each wire portion is two legs connected to each other of one wire bent along a bending line. obtain. In this case, the bend line may preferably be formed at the distal end of the bristle carrier. In this way, it is possible to avoid sharp edges at the distal end of the bristle carrier, which sometimes presents a risk of damage when using the brush as an interdental brush.

  Furthermore, it is possible to arrange | position the bending line mentioned above in the middle of a wire. In this context, it should be pointed out that in this case individual regions with different cross sections may be provided on the wire, preferably mirror-symmetrically with respect to the bending line in each wire part. .

  Furthermore, it may be assumed that the at least two wire portions are twisted together over a partial region of their respective length. This is intended to attach the hair braid to the hair carrier. However, it is also possible for at least two wire parts forming the bristle carrier of the brush to be twisted together over their entire length. This can simplify the attachment of the grip on the bristle carrier.

  At least two, or more, or all of the wire portions of the brush may each have the same or different contour as already described above. That is, by combining the wire parts configured differently or similarly, a torsion brush provided with a bristle carrier having a different structure can be provided particularly easily.

  In one embodiment of the torsion brush, it may further be envisaged that at least one of the at least two wire portions tapers towards its distal end. As a result, at least the distal end portion of the bristle carrier can have a minimum size, so that the diameter of the hole through which the torsion brush can pass can be minimized. This is particularly advantageous in order to provide a torsion brush that is suitable as an interdental brush, especially for narrow interdental spaces. In this case, in particular, it may be assumed that at least one tapered wire portion is formed in a conical shape, a truncated cone shape, a pyramid shape or a truncated pyramid shape.

  In particular, in the case of a brush having at least one wire part which is preferably tapered towards the distal end, the different cross-sections of at least two regions of the wire part are of the same cross-sectional shape. May have cross-sectional areas of different sizes. This applies, for example, to a brush in which at least one of the wire parts of the bristle carrier is formed in a conical shape, a truncated cone shape, a pyramid shape, or a truncated pyramid shape.

  In particular, in the case of a wire portion having a tapered shape at the extending portion of the longitudinal axis, each region having a different cross section may be an infinitely small region.

  Furthermore, in brushes, in particular brushes having at least the features of claim 1, each wire portion is at least in the region forming the distal portion of the bristle carrier, with a crossing different from an oval or elliptical cross-sectional shape. It can be envisaged to have a face or no oval and / or oval cross section. That is, each wire portion may have, for example, a circular, square, or rectangular cross section in the region.

  In particular, the torsion brush according to the invention can easily be produced by a method with the means and features of the independent method claims. In particular, a method for producing a torsion brush with a bristle carrier comprising a plurality of wire parts twisted together is proposed, in which at least two wire parts are twisted together to form a bristle carrier. , At least one of the at least two wire portions is a shaped wire portion having at least two regions, each with a differently shaped cross section. In this case, it may be assumed that a plurality or all of the wire portions to be twisted are formed as described above.

  At least one of the plurality of wire portions may be twisted after being delivered in a molded state, or the wire portions after forming have at least two regions each having a different cross section. You may shape | mold so that it may have.

  Preferably, however, a plurality, or even all, of the wire portions are shaped so as to have at least two regions, each having a differently shaped cross section after its shaping. The forming process applied to each wire portion may be preferably the same.

  After the molding, for example, it is possible to put a bristle material between the molded wire portions and twist the wire portions together to form a hair carrier.

  It can be advantageous if the regions of the same cross-section of each wire part shaped to be identical or coincident are twisted together. The bristle carrier that can be formed in this case comprises a proximal part with a cross-section of a first shape, a cross-section of another shape, corresponding to the cross-section of the individual regions of each wire part. It has a middle portion and / or a distal portion with yet another shape. In this case, each wire part may have the same cross section in each said part of a bristle carrier.

  In one advantageous embodiment of the method according to the invention, a plurality of wire parts are connected together to form one wire, each wire part is shaped and then bent along the bending line, It is envisaged to bring each other to the relative position required to twist them together. That is, finally, one wire portion is disposed on each side of the bending line. After the wire portions further joined to each other in the bending line reach the above position, they may be twisted together to form a hair carrier.

  The wire portion can be formed using a wire forming device and / or a wire material removing device.

  Depending on the application, the respective wire portions, preferably on both sides of the above-mentioned bend line, are preferably arranged in a circular cross section in each region and / or in each region by means of a wire forming device and / or a wire scraping device. An oval cross section and / or an oval cross section in each one region and / or a semicircular cross section in each one region may be provided.

  Each wire portion may be pulled out of the reserve roller before its forming. In this case, for example, it may be advantageous to straighten the wire portion using the wire scoring device already described above. In this context, straightening the wire portion may mean that the basic roundness of the wire portion is removed, especially when the wire portion is pulled from the wire roller and fed to the wire forming device. .

  As another improvement in the field of production of torsional brushes, a brush making machine of the type mentioned at the outset, with the means and features of the independent claims relating to such a machine, is also proposed. This brush making machine is adjusted to produce a twisting brush, in particular a twisting brush according to any one of claims 1 to 17, in particular the brush making machine is at least one of the wire parts to be formed. In one area, the apparatus has a wire forming apparatus capable of changing the cross section of the wire portion to be formed, whereby the wire portion after forming has at least two areas each having a different cross section. It is characterized by having.

  It may be advantageous if the brush making machine has a wire rod wetting device placed in front of the wire forming device in the wire conveying direction. The wire rod scoring device may have a plurality of driven driven scoring rollers, through which the wire rod supplied to the wire rod deforming device or the supplied wire rod portion passes. Thus, the wire can be linearized by removing the initial roundness that may exist in the wire fed from the reserve roller.

  Furthermore, it may be reasonable for the brush making machine to have a wire cutting device. The wire rod cutting device may be disposed downstream from the wire rod forming device in the wire rod conveying direction.

  For convenience, the brush making machine may be adjusted to carry out the method according to the invention.

  As the material for the wire portion forming the hair carrier, general materials, particularly metals, metal alloys and plastics can be used.

  In the following, embodiments of the invention will be described in more detail with reference to the drawings. Partly in a schematic diagram.

It is a perspective view which shows a part of bristle carrier formed from two wire parts twisted together, and each wire part has a circular cross section, respectively. It is a perspective view which shows a part of another bristle carrier which consists of two wire parts twisted together, and each wire part has a semicircular cross section, respectively. FIG. 4 is another perspective view showing a part of a bristle carrier of a torsion brush according to the present invention, wherein two wire portions twisted together of the bristle carrier each have an elliptical cross section. FIG. 4 is a diagram schematically showing an end face of the hair carrier shown in FIGS. 1 to 3 in order to clearly indicate a free area generated based on a different cross-sectional geometric shape of each wire portion. FIG. 4 is a diagram schematically showing an end face of the hair carrier shown in FIGS. 1 to 3 in order to clearly indicate a free area generated based on a different cross-sectional geometric shape of each wire portion. FIG. 4 is a diagram schematically showing an end face of the hair carrier shown in FIGS. 1 to 3 in order to clearly indicate a free area generated based on a different cross-sectional geometric shape of each wire portion. FIG. 2 is a perspective view of a wire formed in accordance with the present invention, the wire being two outer portions having a circular cross-section, followed by two portions disposed further inside and each having a semi-circular cross-section. And an intermediate region or portion having an elliptical cross section. It is a figure which shows the place where the wire shown in FIG. 7 was bent centering on a bending line as a hair carrier material. FIG. 9 is a view showing a bristle carrier formed by twisting two wire parts connected to each other at a bending line of the bristle carrier material shown in FIG. 8, and showing the torsion brush according to the present invention shown in each subsequent drawing. Originally, the hair filaments screwed between the wire portions are not shown in order to make the drawing easy to see. It is a side view which shows partially the hair carrier inserted in the injection mold with the hair braid at the distal end part. It is a side view of the brush completed by injecting the injection molding material into the injection mold shown in FIG. It is a figure which shows the end surface of the brush shown in FIG. FIG. 13 is a perspective view of the brush shown in FIGS. 11 and 12. 1 is a perspective view schematically showing a part of a brush manufacturing machine according to the present invention. FIG. 2 is a perspective view of a bristle carrier material for a bristle carrier of a torsion brush, having two wire portions connected to each other, each wire portion being followed by a proximal portion having a circular cross section, respectively. An intermediate portion and a distal portion having a rectangular cross section. FIG. 3 is a perspective view of another bristle carrier material for a bristle carrier of a torsion brush, having two wire portions connected to each other, each wire portion having a proximal portion having a circular cross-section, and Followed by an intermediate portion and a distal portion having a truncated pyramidal shape tapering toward the distal end of the wire portion. FIG. 5 is a perspective view of another bristle carrier material for a bristle carrier of a torsion brush, having two wire parts connected to each other, each of the wire parts tapering over the entire length of the wire part; It has a pyramidal shape. FIG. 5 is a perspective view of another bristle carrier material for a bristle carrier of a torsion brush, having two wire parts connected to each other, each of the wire parts tapering over the entire length of the wire part; It has a conical shape. FIG. 4 is a diagram showing a list of various cross-sectional geometric shapes that can be used for the configuration of the wire portion and the cross-section of the wire portion.

  FIGS. 10 to 13 show a torsion brush, for example, used as a mascara brush or an interdental brush, generally denoted by reference numeral 1. This brush 1 has a bristle carrier 2 consisting of two wire segments 3 twisted together. A bristle assembly 5 is formed on the distal portion 4 of the hair carrier 2, and a gripping portion 7 is formed on the proximal portion 6 of the hair carrier 2.

  In the torsion brush 1 shown in FIGS. 10 to 13, the gripping portion 7 is injected around the proximal portion 6 of the bristle carrier 2 by an injection molding method. For this purpose, an injection mold 8 shown in FIG. 10 is used, into which the proximal part 6 of the hair carrier 2 may be inserted. The injection molding material is injected into the injection mold 8 through the injection opening 9 and the injection nozzle applied thereto, and is injected so as to surround the proximal portion 6 of the bristle carrier 2. Thus, the gripping part 7 can be formed and coupled to the hair carrier 2.

  In one embodiment of the brush 1 according to the invention, it is envisaged to use a bristle carrier 2 which is shown partly and largely schematically in FIG. In this case, each wire portion 3 has an elliptical cross section at least in the region 4 a forming the distal portion 4 of the bristle carrier 2. By using such a wire portion 3 having a cross section formed into an oval shape, the diameter of the hole through which the brush 1 can pass can be minimized. This hole diameter must be kept to a minimum, in particular in order to use the brush 1 according to the invention as an interdental brush. The region 4a of the wire portion 3 may be referred to as a distal region 4a.

  The parts of the bristle carrier 2 shown in FIGS. 1 and 2 are respectively from a plurality of wire portions 3 (see FIG. 1) having a circular cross section and a plurality of wire portions 3 (see FIG. 2) having a semicircular cross section. Is formed.

  4 to 6 schematically show end surfaces of the portion of the hair carrier 2 shown in FIGS. 1 to 3, respectively. In these drawings, the two wire portions 3 are each surrounded by one circle representing a virtual envelope. A wire part 3 having a circular cross section was used, based on the vacant area or free area, respectively, indicated by the reference numeral 10 resulting from the difference between the area defined by the envelope and the total cross-sectional area of both wire parts 3 Obviously, the free area 10 is maximized in some cases. The minimum free area 10 is obtained when a wire part 3 having a semicircular cross section is used (see FIG. 5). In this case, a free area 10 that is not covered by the entire cross section of both wire portions 3 is hardly recognized.

  In order to injection mold the gripping part 7 on the proximal part 6 of the bristle carrier 2, the free area 10, ie the area of the envelope cross section not covered by the cross section of the wire part 3, must be minimized. It is advantageous. In order to use the brush 1 as an interdental brush, the use of a wire part 3 having an oval and / or elliptical cross section at least in the distal part 4 of the bristle carrier 2 minimizes the free area A good compromise is obtained, consisting of 10 and the minimized through-hole diameter and durability of the bristle carrier 2.

  The bristle carrier 2 of the torsion brush 1 shown in FIGS. 10 to 13 has a pull-out preventing portion 12 that is spaced from the proximal end portion 11 thereof. This pull-out preventing part 12 is provided in the form of a cross-sectional geometric shape changing part along the longitudinally extending part of the bristle carrier 2. The pull-out prevention part 12 can prevent the hair carrier 2 from being pulled out from the gripping part 7 arranged in the proximal part 6 of the hair carrier by injection molding.

  The pull-out preventing part 12 enables a shape-connective connection between the bristle carrier 2 and the grip part 7 injection-molded so as to surround the hair carrier 2.

  In the embodiment of the brush 1 as shown in FIGS. 10 to 13, each wire part 3 has three regions 4a, 6a and 13a, respectively, which are shaped differently. It has a cross section. The pull-out preventing portion 12 is formed by a cross-section changing portion along the longitudinally extending portion of the bristle carrier 2 that is generated based on each different cross-section. Thus, the hair carrier 2 has an intermediate portion 13 that forms a cross-sectional taper of the hair carrier 2 between its distal portion 4 and proximal portion 6. A proximal step portion 14 is formed as the pull-out preventing portion 12 between the intermediate portion 13 and the proximal portion 6. Via this proximal step 14, after injection molding for the proximal part 6 of the bristle carrier 2, the gripping part 7 is connected in shape connection with the bristle carrier 2. In particular in FIGS. 10 and 11, the outer dimension of the bristle carrier 2 on its intermediate part 13, which is measurable in the spatial direction transverse to the longitudinal extension of the bristle carrier 2, is shown in the adjacent proximal part 6. It is shown that the bristle carrier 2 is smaller than the outer dimension measured in the same spatial direction.

  The bristle carrier 2 further has a distal step 15 between the intermediate part 13 and the distal part 4. In order to form the distal step 15, the outer dimension at the intermediate part 13 of the bristle carrier 2, which can be measured in a spatial direction transverse to the longitudinal extension of the bristle carrier 2, is measured in the same spatial direction. Further, it is smaller than the outer dimension of the distal portion 4 of the hair carrier 2. The distal step portion 15 can be used as a positioning stopper for the injection mold 8 shown in FIG. In the embodiment of the brush 1 shown in FIGS. 10 to 13, each wire part 3 has a circular cross section in the region 6 a forming the proximal part 6 of the bristle carrier 2. These regions 6 a may be referred to as proximal regions 6 a of the wire portion 3.

  Each of the wire portions 3 of the brush 1 shown in FIGS. 10 to 13 forms a middle portion 13 of the bristle carrier 2 and thus has a semicircular cross section in a region 13a that may be called an intermediate region 13a. Have. The two wire portions 3 twisted together are oriented relative to each other at the intermediate portion 13 so that they face each other on the uncurved flat side of the semicircular cross section. Based on the use of the wire part 3 having a semicircular cross-section in the intermediate part 13, the bristle carrier 2 of the brush 1 according to the invention is in its middle part 13 relative to the other parts 4 and 6 of the bristle carrier 2. In comparison, you will get the details. In this case, the transition part which goes to the enlarged diameter part of the proximal part 6 from the taper of the intermediate part 13 forms the above-mentioned extraction preventing part 12.

  As already mentioned above, each wire part 3 has an elliptical cross section at the distal part 4 of the bristle carrier 2. This makes it possible to use the brush 1 as an interdental brush which has a particularly small passable hole diameter and can therefore be easily inserted into relatively narrow interdental spaces.

  The two wire portions 3 twisted together at the distal portion 4 of the bristle carrier 2 are each oriented to face each other with one of the two short-axis vertices of the elliptical cross section. In this case, in the region of the apex on the short axis facing each other of the elliptical cross section, the hair filament arranged between the wire portions 3 forming the hair braid 5 is also clamped.

  The gripping part 7 is attached to the bristle carrier 2 so as to surround the proximal part 6 of the bristle carrier 2 and the pull-out prevention part 12 in the form of the proximal step 14 and part of the intermediate part 13.

  As shown in FIGS. 7 to 9 and FIGS. 10 to 13, each wire portion 3 is two legs connected to each other of one wire 17 bent along the bending line 16. . At the distal end 18 of the bristle carrier 2, the wire portions 3 are still connected to each other even in use. The bend line 16 of the bristle carrier 2 is located at the distal end 18 of the bristle carrier 2. In this way, sharp edges and / or transitions that can be a risk of damage when the brush 1 is used as an interdental brush are avoided in this region.

  In FIG. 8, the bend line 16 is disposed in the middle of the wire 17, and the contours provided to the wire portions 3 disposed on both sides of the bend line 16 are mirror-image-symmetric with respect to the bend line 16, respectively. It is clearly stated.

  The brush 1 shown in FIGS. 10 to 13 can be manufactured by the method described below. In order to manufacture the twisting brush 1, in this case, for example, each wire portion 3 in a state of being connected to form one wire 17 as recognized in FIG. 14 is a wire of the brush manufacturing machine 20 according to the present invention. As a result, the wire 17 has a plurality of regions 4 a, 6 a, 13 a having different cross-sectional geometric shapes on both sides of the virtual bending line 16.

  7 and 8 show the wire 17 formed in this manner, and the wire 17 has three regions having different cross-sectional geometric shapes on both sides of the bending line 16 (see FIG. 8). It has two wire parts 3 provided with 4a, 6a, 13a. On both sides of the bend line 16, there is first a region 4a in which both wire segments 3 have an elliptical cross section. Each region 4a having an elliptical cross section is followed by a shorter region 13a having a semicircular cross section. This region 13a with a semicircular cross section is then followed by a respective region 6a with a circular cross section in each of the two wire segments 3.

  In FIG. 8, the proximal regions 6a of the wire 17 facing each other with a circular cross section are arranged in the vicinity of the hair carrier 2 after the wire portions 3 arranged on both sides of the bending line 16 are twisted together. The positioning portion 6 will be formed. When twisted together, the two intermediate regions 13a of the wire 17 each having a semicircular cross section will form the intermediate portion 13 of the bristle carrier 2. The two distal regions 4a of the wire 17 each having an oval cross section will eventually form the distal portion 4 of the bristle carrier 2 when the wire portions 3 are twisted together.

  After forming the wire 17, the wire 17 is bent along the bending line 16 (see FIG. 8), and the two legs of the wire 17 separated from each other by the bending line 16 form each wire of the hair carrier 2 to be manufactured. It will be located side by side as part 3. The bristle material can then be inserted between the two wire segments 3 defined in this way, and the wire segments 3 can be twisted together to form the bristle carrier 2 of the brush 1, whereby both sides of the bend line 16 can be formed. The regions 4a, 6a, 13a having the same cross-section of each of the wire portions 3 are joined together to form the distal portion 4, the intermediate portion 13 and the proximal portion 6 of the bristle carrier 2. . In this case, the three parts of the bristle carrier 2 have different cross-sectional geometries.

  The wire 17 is applied on both sides of the bend line 16 by a wire forming device 19 of the brush making machine 20 and possibly by a wire scraping device 22 of the brush making machine 20 as at least partially illustrated in FIG. Are each provided with a circular cross section in at least one region 6a, each provided with an oval or elliptical cross section in at least one other region 4a, and semicircular in at least one other region 13a. It may be provided with a cross section, i.e. it may be molded.

  When the wire 17 is drawn out from the wire reserve roller 23 which is also recognized as a constituent member of the brush manufacturing machine 20 in FIG. 14, it is reasonable to straighten the wire 17 by the wire material wetting device 22. That is, by winding the wire around the reserve roller 23, the wire gets a basic roundness that must be removed before molding. The brush manufacturing machine 20 further includes three wire rod clamps 24, and the wire rod 17 can be gripped by these wire rod clamps 24 and pulled out from the reserve roller 23.

  The wire rod forming device 19 has two press halves 25 that are movable toward each other and toward the wire rod 17 disposed therebetween, and these press halves 25 provide a desired cross-sectional profile to the wire rod 17. Can be formed. Each wire portion 3 of the wire 17 to be formed has a total of at least two different cross sections after the forming. The wire 17 having the two wire portions 3 may be taken out by the take-out gripper 21 after molding and delivered to a station after the brush making machine 20.

  The wire rod scoring device 22 is arranged in the brush manufacturing machine 20 so as to be positioned in front of the wire rod forming device 19. The wire rod scoring device 22 has a plurality of barb rollers 26, and only one or all of the barb rollers 26 can be driven as necessary. The wire rod 17 fed out from the reserve roller 23 can be linearized before being formed by the wire rod forming device 19 through these wire rod scavenging rollers 26. However, the wire wetting roller 26 is also used to change the normally circular original cross-section of the wire 17 drawn from the reservoir roller 23 to an oval or oval cross-section, if necessary. be able to. If such a change in the cross-sectional geometry of the wire 17 drawn from the reservoir roller 23 is desired, it is advantageous to drive a plurality of wire scissoring rollers 26 of the wire scoring device 22. . After the wire 17 passes through the wire forming device 19 to obtain a desired contour, the wire 17 reaches the wire cutting device 27 of the brush manufacturing machine 20. With this wire cutting device 27, the length of the wire 17 can be shortened. In this case, the brush manufacturing machine 20 is adjusted to perform the method described above.

  The twisting brush 1 shown in FIGS. 10 to 13 has a bristle carrier 2 composed of two wire portions 3 twisted together. Both wire portions 3 each have a plurality of regions 4a, 6a and 13a having different cross sections.

  Each wire portion 3 connected to each other via the bending line 16 is also shown in FIGS. Each of the wire portions 3 shown in FIGS. 15 to 18 is not yet twisted with each other and does not yet have the bristle assembly 5, so it is called a bristle carrier material capable of forming the bristle carrier 2 for the torsion brush 1. Sometimes. All of the bristle carrier materials shown in FIGS. 15 to 18 are suitable for manufacturing the torsion brush 1.

  The two bristle carrier materials of the bristle carrier 2 shown in FIGS. 15 and 16 are each composed of two wire portions 3. Both wire segments 3 each have a proximal region 6a, in which each wire segment 3 is round, in this case has a circular cross section.

  Each proximal region 6a is followed by an intermediate region 13a of each wire portion 3, which finally transitions to a distal region 4a of each wire portion 3. Each wire portion 3 of the bristle carrier material shown in FIG. 15 has a rectangular cross section in the intermediate region 13a and the distal region 4a. As a result, the bristle carrier 2 formed from the bristle carrier material has a relatively small outer dimension at its distal portion, and the torsion brush 1 equipped with the bristle carrier 2 has a relatively small pore diameter, that is, For example, it is suitable for a relatively small interdental space.

  The bristle carrier material shown in FIG. 16 has two wire portions 3, and the intermediate region 13a and the distal region 4a of these wire portions 3 are formed in a truncated pyramid shape, that is, the hair carrier. 2 or taper toward the distal end of the wire segment 3. This also facilitates the relatively small outer dimensions of the distal portion 4 of the bristle carrier 2, and this bristle carrier 2 that can be produced from the bristle carrier material shown in FIG. Is suitable.

  Also in the case of each wire part 3 shown in FIGS. 15-18, the two wire parts 3 arrange | positioned corresponding to one bristle carrier 2 have the same outline mutually. That is, the two wire portions 3 connected to each other through the bending line 16 have a plurality of regions 4a, 13a and 6a in the same order and form.

  Each wire portion 3 of the material of the bristle carrier 2 shown in FIGS. 17 and 18 is tapered toward the distal end thereof. As already described above, the two wire portions 3 of the embodiment shown in FIG. 17 have a conical shape, that is, a shape that tapers conically toward the distal end. In the embodiment of the material of the bristle carrier 2 with two wire portions 3 shown in FIG. 18, each wire portion 3 has a truncated pyramid shape that tapers toward the distal end thereof. It is recognized that it has. That is, these wire portions 3 have a plurality of regions each having a different cross section, that is, a decreasing cross section.

  In the embodiment of the wire part 3 suitable for forming the bristle carrier 2 of the torsion brush 1 shown in FIGS. 17 and 18, the different cross sections of the three regions 4a, 6a and 13a of the wire part 3 are the same. It has a cross-sectional shape. However, the cross-sectional area of the cross section of each wire rod portion 3 is reduced as it approaches each distal end portion of each wire rod portion 3.

  In the embodiment of each wire part 3 shown in FIGS. 15 to 18, each wire part 3 is at least in the region 4 a forming the distal part 4 of the bristle carrier 2 and / or has an oval cross-sectional shape and / or It has a cross section different from the elliptical cross section. That is, there are no oval and / or elliptical cross sections here.

  FIG. 19 shows a collection of each possible cross-sectional shape that can be used for different regions 4a, 6a and 13a of the wire part 3 in the manufacture and configuration of each wire part 3, although not final. Has been. Specifically, each wire portion 3 may have a different cross-sectional shape or cross-section from that shown in FIG. 19 in each of the different regions 4a, 6a and 13a.

  A brush 1 comprising a bristle carrier 2 consisting of a plurality of wire segments 3 twisted together, proposed as an improvement in the technical field of torsion brushes 1, comprises at least a distal part 4 of the bristle carrier 2 with an oval cross section and And / or has an elliptical cross section. Furthermore, a torsion brush 1 is also proposed in which the bristle carrier 2 has a pull-out prevention part 12 spaced from its proximal end part 11. The hair carrier 2 can be fixed to the gripping portion 7 of the torsion brush 1 through the pull-out preventing portion 12 to prevent pull-out. Furthermore, a method for manufacturing a twisting brush 1 is also proposed in which a plurality of wire portions 3 are twisted together to form one bristle carrier 2, and at least one wire portion 3 among these wire portions 3 is respectively It has at least two regions 4a, 6a, 13a with differently shaped cross sections. Further, another object of the present invention is a brush manufacturing machine 20 having a wire rod forming device 19, in which at least one region 4 a, 6 a, 13 a of the wire portion 3 to be formed is formed by the wire rod forming device 19. The cross section of the power wire portion 3 can be changed, whereby the wire portion 3 will have at least two regions 4a, 6a, 13a, each having a differently shaped cross section, after forming. It is a manufacturing machine 20.

DESCRIPTION OF SYMBOLS 1 Brush 2 Bristle carrier 3 Wire part 4 Distal part 4 2 Distal region 4 2 Hair 3 in 2 3 Proximal part 6 2 Proximal part 6a 3 Proximal area 7 Grasping part 8 Injection mold 9 Injection opening 10 Free Proximal end portion of area 112 2 Pull-out prevention portion 132 Intermediate portion 13 2 Intermediate region 13 a 3 14 Proximal step portion 15 Distal step portion 16 Bend line 17 Wire rod 18 Distal end portion of wire 18 19 Wire rod forming device 20 Brush Manufacturing machine 21 Unloading gripper 22 Wire material scavenging device 23 Reserve roller 24 Wire material clamp 25 Press half 26 Wire material scavenging roller 27 Wire material cutting device

Claims (24)

A torsion brush (1), in particular a mascara brush or an interdental brush, comprising a bristle carrier (2) consisting of at least two wire parts (3) twisted together, distal to the bristle carrier (2) In the part (4) in which the hair structure (5) is formed,
At least one wire portion (3) of the at least two wire portions (3) has at least two regions (4a, 6a, 13a) each having a different cross section. , Torsion brush (1). A torsion brush (1) according to claim 1, in particular a mascara brush or an interdental brush, comprising a bristle carrier (2) consisting of at least two wire parts (3) twisted together, In which the hair braid (5) is formed in the distal part (4) of the hair carrier (2),
Each said wire portion (3) has an oval cross section and / or an oval cross section at least in the region (4a) forming said distal portion (4) of said hair carrier (2). A torsion brush (1), characterized in that 3. A torsion brush (1) according to claim 1 or 2, comprising a bristle carrier (2) comprising at least two wire segments (3) twisted together, the distal end of the bristle carrier (2). In the torsion brush (1) in which the bristle (5) is formed in the part (4),
The bristle carrier (2) has a pull-out prevention part (12) arranged at a distance from the proximal end part (11) thereof, and the bristle carrier via the pull-out prevention part (12). A torsion brush, characterized in that (2) can be fixed to a gripping part (7) which can be or is arranged on the proximal part (6) of the bristle carrier (2) 1).   At least one wire part (3), preferably all wire parts (3), have at least two regions (4a, 6a, 13a) each having a differently shaped cross section, The pull-out prevention part (12) is a longitudinal portion of the bristle carrier (2) resulting from a plurality of different cross sections of at least one wire part (3) in each wire part (3) twisted together. The brush (1) according to any one of claims 1 to 3, wherein the brush (1) is formed by a cross-section changing portion along the direction extending portion.   The bristle carrier (2) has an intermediate part (13) between its distal part (4) and proximal part (6), said intermediate part (13) and said proximal part ( 6), a proximal step portion (14) is formed as a pull-out preventing portion (12), and the grip portion (7) is connected to the hair carrier via the proximal step portion (14). The brush (1) according to any one of claims 1 to 4, wherein the brush (1) is connectable in shape connection with (2) and is connected in use.   Measured in a spatial direction transverse to the longitudinally extending portion of the bristle carrier (2) to form the pull-out prevention part (12) that the bristle carrier (2) has in its middle part (13) A possible outer dimension is smaller than the outer dimension of the bristle carrier (2) measured in the same spatial direction at an adjacent proximal part (6). Brush (1).   The bristle carrier (2) has a distal step (15) between the intermediate part (13) and the distal part (4), in particular the intermediate part (13) and the far part. The bristle carrier measurable in a spatial direction transverse to the longitudinal extension of the bristle carrier (2) in order to form the distal step (15) with the central part (4) The outer dimension of the intermediate part (13) of 2) is smaller or larger than the outer dimension of the distal part (4) of the bristle carrier (2) measured in the same spatial direction. The brush (1) according to any one of 1 to 6.   The region (6a) of each wire segment (3) forming the proximal portion (6) of the bristle carrier (2) has a circular or oval or oval or semicircular cross section, respectively. The brush (1) according to any one of the preceding claims.   The region (13a) of each wire part (3) forming the intermediate part (13) of the bristle carrier (2) has a semicircular cross section, in particular it is twisted together to form the intermediate part (13a). 9. Brush (1) according to any one of the preceding claims, wherein the two wire parts (3) forming the part (13) face each other on the flat side of their semicircular cross section. 1).   The region (4a) of each wire portion (3) forming the distal portion (4) of the bristle carrier (2) has an oval cross section and / or an oval cross section; In particular, the two wire portions (3) twisted together at the distal portion (4) of the bristle carrier (2) face each other with one apex on the minor axis of its elliptical cross section. 10. A brush (1) according to any one of the preceding claims.   The gripping part (7) at least partially surrounds the proximal part (6) of the bristle carrier (2) and the pull-out prevention part (12), preferably the intermediate part (13). 11. Brush (1) according to any one of the preceding claims, attached to the bristle carrier (2), in particular injection-molded around the bristle carrier (2).   Each of the wire portions (3) is two legs connected to each other of one wire (17) bent along a bend line (16). Preferably, the bend line (16) is 12. The method according to claim 1, wherein the bristle carrier is formed at a distal end of the hair carrier and / or arranged in the middle of the wire. Brush (1).   The at least two wire segments (3) are twisted together over a partial region of their respective lengths, or the at least two wire segments (3) are twisted together over their entire length. The brush (1) according to any one of items 1 to 12.   14. Brush (1) according to any one of claims 1 to 13, wherein at least two, or more or all of the wire parts (3) have the same or different contours, respectively.   At least one wire portion (3) of the at least two wire portions (3) is tapered towards its distal end, in particular the at least one wire portion (3) is conical, The brush (1) according to any one of the preceding claims, wherein the brush (1) is in the form of a truncated cone, a pyramid or a truncated pyramid.   16. A cross-sectional area as claimed in claim 1, wherein different cross-sections of the at least two regions (4a, 6a, 13a) have the same cross-sectional shape but different cross-sectional areas. The brush (1) described.   Each wire portion (3) has an oval cross-sectional shape and / or an elliptical cross-sectional shape at least in a region (4a) forming the distal portion (4) of the bristle carrier (2). 17. Brush (1) according to any one of the preceding claims, having different cross sections or having no oval cross section and / or no elliptical cross section.   18. A method for manufacturing a torsion brush (1) according to any one of claims 1 to 17, wherein at least two wire segments (3) are twisted together to form one bristle carrier (2). , At least one of the at least two wire portions (3) has at least two regions (4a, 6a, 13a) each having a differently shaped cross section (3a, 6a, 13a). ) Is the method.   At least one wire part (3), or a plurality or all of the wire parts (3), each in particular similarly shaped differently before being twisted together to form the bristle carrier (2). It is shaped to have at least two regions (4a, 6a, 13a) with a cross section, and in particular, the regions (4a, 6a, 13a) of the same cross section of each of the shaped wire parts (3) The method of claim 18, wherein the methods are twisted together.   A plurality of the wire portions (3) are connected to each other to form one wire rod (17), and after forming each wire portion (3), the wire rod (17) is bent along a bending line (16). 20. Method according to claim 18 or 19, wherein said wire parts (3) are brought to each other relative positions required for twisting together.   Each of the wire portions (3), preferably on both sides of the bend line (16), is preferably applied to each one region (4a, 6a, 13a) by means of a wire forming device (19) and / or a wire rod weaving device (22). ) Circular cross section and / or oval cross section in each one region (4a, 6a, 13a) and / or elliptic cross section in each one region (4a, 6a, 13a) 21. A method according to any one of claims 18 to 20, wherein a semicircular cross section is provided in each one region (4a, 6a, 13a). Especially in a brush manufacturing machine (20) for manufacturing a torsion brush (1) according to any one of claims 1 to 17,
The brush manufacturing machine (20) changes the cross section of the wire portion (3) to be formed in at least one region (4a, 6a, 13a) of the wire portion (3) to be formed. A wire forming device (19) that can be formed, whereby the wire portion (3) after forming has at least two regions (4a, 6a, 13a) each having a differently shaped cross section. A brush making machine (20), characterized in that   The brush manufacturing machine (20) has a wire rod scoring device (22) placed in front of the wire rod forming device (19) in the wire conveying direction, and / or the brush manufacturing machine (20) The brush manufacturing machine (20) according to claim 22, comprising a wire cutting device (27).   24. A brush making machine (20) according to claim 22 or 23, adapted to carry out the method according to any one of claims 18 to 21.