Abstract:
The invention relates to a device ( 100 ) and to the use thereof for mixing material to be mixed. The device ( 100 ) comprises a container ( 10 ) having an opening, a lid ( 20 ) for closing the opening, and a mixer ( 40 ), which protrudes through the lid ( 20 ) into the interior of the container ( 10 ). Furthermore, a drive device ( 30 ) having a drive (M) for driving the mixer ( 40 ) is provided, wherein the drive device ( 30 ) has a connection area ( 31 ), which is designed in such a way that the container ( 10 ), together with the lid ( 20 ), can be connected to the connection area ( 31 ). In establishing the connection, the mixer ( 40 ) is coupled to the drive device ( 30 ) in a driven manner. The mixer ( 40 ) and the lid ( 20 ) form a fixed assembly. A first element ( 28, 29 ) is arranged in the lid ( 20 ) and a second element (S 2 ) is arranged in the connection area ( 31 ), wherein said first element and second element interact with each other and activate a current supply to the drive (M) by means of the second element (S 2 ), when the container ( 10 ), together with the lid ( 20 ), is placed.

Description:
AREA OF THE INVENTION 
       [0001]    The subject of the present invention is an apparatus and a method for mixing of a material to be mixed. In particular, the mixing of edibles is concerned, and in the area of edibles especially drinkable edibles. 
       BACKGROUND OF THE INVENTION, STATE OF THE ART 
       [0002]    There are many fields which concern the mixing of material to be mixed. In the following, the field of edibles is concerned primarily, although the invention can applied also in numerous different fields. 
         [0003]    In the field of edibles, there are mixers, stirring staffs and other means for mixing edibles and ingredients with each other as needed in a private household and in professional kitchens. The preparing of a salad dressing is mentioned as an example. Here, the liquid and solid ingredients are often put into a mixing container, which is closeable with a lid. The constituents are mingled with other by shaking. In order to improve the stirring, there are containers, the lid of which has a fixedly standing arrangement of rods, which protrudes into the interior of the container and promotes the mixing. Also known are mixing containers, which comprise a stirring device, which is integrated in the lid and which is moveable by cranking a handle on the top side of the lid. Such containers typically comprise at least one spout so that the lid does not have to be taken off. 
         [0004]    Also known are kitchen devices, which comprise a motor to automatize the mixing or stirring. An example of a typical kitchen mixer is shown in  FIG. 1 . The kitchen mixer comprises a drive device  4 , which can be deposited for example on a work surface T. For mixing, a special container  1  is screwed on, which comprises a cap  5  that achieves several tasks. In the cap  5 , a stirring device  3  is integrated, which protrudes into the interior of the special container  1 . The cap  5  seals the special container  1  to the lower side and the cap  5  serves as a screw coupling with a connection section of the drive device  4 . The cap  5  is typically welded or pasted on in order to avoid leakages. In addition to the corresponding lower opening, which is closed with the cap  5 , the special container  1  has an upper opening, which is closeable spray-tightly by means of a lid  2 . 
         [0005]    The cap, which accommodates the stirring device  3 , is often composed of several component parts, which are complex to assemble and disassemble. 
         [0006]    It is a disadvantage of the previously known solutions that the effort for cleaning is often very high. In addition, some of the mentioned solutions require a series of special parts or equipment. However, aspects such as manageability, variability and flexibility play an important role especially in the field of edibles. In addition, it is important that such equipment should be dissassembleable as simple and complete as possible in order to satisfy the highest hygienic standards. It is a further problem of such equipments, that they are often used particularly in kitchens or public areas by multiple users. Thereby, ingredients may be mingled with each other, if for example the special container  1 , together with the integrated stirring device  3 , has not been sufficiently cleaned up. 
         [0007]    It is thus an object to provide a simpler approach for mixing, mingling, stirring and even for chopping up or hacking up ingredients or other material to be mixed. The according means shall be applicable as universally as possible and a sufficient hygiene shall be ensured for each user. 
         [0008]    According to the invention, a completely novel approach comes to application, which is based thereon that an apparatus comprising a container, for example a drinking bottle, is used, which comprises only one single opening. This opening is tightly closeable by means of a lid. A stirring device is envisaged, which is fixedly integrated in the lid, in such a way that after the closing of the opening by means of the lid the stirring device protrudes into the interior of the container. In addition, the apparatus comprises a drive device comprising a connection area, which is designed such that container, together with the lid, is attachable to or puttable on the connection area. Upon attaching the container to or putting it on, the stirring device is connected with the drive device as concerns the drive (preferably force-fittedly). If the drive device is now activated, it transfers the stirring device in rotation through the lid. The rotation of the stirring device effects the mixing or mingling of material to be mixed, which is present in the interior of the container. 
         [0009]    The apparatus according to the invention enables a whole series of novel applications, which will gain importance in particular in the field of nutrition. 
         [0010]    The apparatus according to the invention is applicable flexibly and may be cleaned without problems. Particularly advantageously is the fact, that the number of the component parts could be reduced to three basic elements. In total, the apparatus comprises namely only the lid with the fixedly integrated stirring device, the container, for example in the form of a drinking bottle, and the drive unit. 
         [0011]    With this solution, the usual washing off of many single device pieces, part of which are accessible only with difficulty, is dispensed with. In addition, the decanting of mixtures for storage or further processing is dispensed with, because the mixture is provided in situ, i.e. directly in the container. The mixture can made, stored and transported absolutely hygienically. Depending on the design, also no third party has access to the mixture, which may be of importance especially in the field of high performance sports and of professional sports. 
         [0012]    The apparatus according to the invention is suited in particular for a beverage mixer. 
         [0013]    The apparatus according to the invention may be applied as a kitchen or gastronomy application for example in the preparation of soups, sauces, beverages, shakes, soft drinks, etc. 
         [0014]    In the field of sports, the apparatus according to the invention may be applied for providing fitness drinks, fitness cocktails, fruit juices, power nutrition, etc. 
         [0015]    The invention is suited for providing nutrition for babies and for providing liquefied nutrition in the field of hospitals, retirement homes and so on. 
         [0016]    Due to the simple handling and because of the fact that there are only three basic elements, there result new and innovative possibilities for the catering. 
         [0017]    The invention may be applied also in other fields, where the quick and unproblematic mixing of ingredients is concerned. The mixing of multi component materials, such as gluing or coloring materials, and the mixing of medicaments or dietary supplements are to be highlighted in particular. 
     
    
     
       DRAWINGS 
         [0018]    Further details and advantages of the invention are described in the following based on embodiment examples and with reference to the drawings, in which: 
           [0019]      FIG. 1  shows a schematic side view of a known kitchen mixer (state of the art); 
           [0020]      FIG. 2A-2H  shows a sequence of schematized figures showing a possible application of an apparatus according to the invention; 
           [0021]      FIG. 3A  shows a schematic side view of an apparatus according to the invention in a first embodiment; 
           [0022]      FIG. 3B  shows a schematic side view of an apparatus according to the invention in a second embodiment; 
           [0023]      FIG. 3C  shows a schematic side view of an apparatus according to the invention in a third embodiment; 
           [0024]      FIG. 4A  shows a schematic side view of an apparatus according to the invention in a further embodiment with open switch; 
           [0025]      FIG. 4B  shows a schematic side view of the apparatus of  FIG. 4A  with closed switch; 
           [0026]      FIG. 5A  shows a schematic side view of an apparatus according to the invention in a further embodiment with open switch; 
           [0027]      FIG. 5B  shows a schematic side view of the apparatus of  FIG. 5A  with closed switch; 
           [0028]      FIG. 6A  shows a schematic top view of the lid of an apparatus according to the invention; 
           [0029]      FIG. 6B  shows a schematic side view of the lid of  FIG. 6A ; and 
           [0030]      FIG. 7  shows a schematic cross sectional view of an apparatus according to the invention in a particularly preferred embodiment with a safety switch. 
       
    
    
     DETAILED DESCRIPTION 
       [0031]    In the following, the invention is described in terms of embodiments, which are particularly tailored to the field of edibles. The invention may be transferred without further ado to other terminology systems and/or areas of expertise. In other areas of expertise, the terms should be applied correspondingly. 
         [0032]    In the  FIGS. 2A to 2H , a sequence of individual steps is shown. The basic elements of the invention shall be described on the basis of these individual steps. 
         [0033]      FIG. 2A  shows a container  10 , here in the form of a drinking bottle, comprising a lid  11 . 
         [0034]    The term container  10  is used herein to paraphrase the following containers: 
         [0035]    bottles, 
         [0036]    cans, 
         [0037]    tins, 
         [0038]    mugs, 
         [0039]    cups, 
         [0040]    beakers, etc. 
         [0041]    These containers  10  may be made for example from glass, plastic material, preferably polycarbonate (PC), polyethylene (PE), highly dense polyethylene (PE), or polypropylene (PP), aluminum or ceramic material. 
         [0042]    The lid  11  is taken off, for example by screwing off. In  FIG. 2B , the container  10  is shown accordingly without lid  11 . The container  10  has an opening  13  in the upper area. In the area of this opening  13 , an external thread, preferably a standardized external thread, is provided. However, other detachable connections between the container  10  and the lid  11  are conceivable, which allow for a tight closing of the container  10  by means of the lid  11 . 
         [0043]    The container may be filled with material F to be mixed through the opening  13 . In  FIG. 2B , a state is shown, in which the container  10  is filled up to approximately ⅔. 
         [0044]    The term material F to be mixed is used herein among others to paraphrase 
         [0045]    liquid and viscous material to be mixed with one or plural ingredients, or 
         [0046]    mixtures or combinations of liquid and viscous material to be mixed with solid ingredients. 
         [0047]    In the following, some examples of material to be mixed from the field of edibles are mentioned: 
         [0048]    liquid (e.g. water) comprising flavor additives (e.g. sirup); 
         [0049]    milk product comprising fruit (e.g. raspberry) or vegetable additives (e.g. cucumber); 
         [0050]    mixed beverage from alcoholic and non-alcoholic portions; and 
         [0051]    hot or cold beverages made of a liquid together with a soluble powder or granulate (e.g. instant coffee or soup powder). 
         [0052]    The material to be mixed may also be taken from the field of non-food. 
         [0053]    In a further step, see  FIG. 2C , this opening  13  is then closed with a special lid  20  according to the invention. This lid  20  comprises a so-called stirring device  40 , which is shown herein purely schematically. The stirring device  40  is integrated in the lid  20  so fixedly, that in total the container  10  is closed tightly. This issue is important, because otherwise when turning the container  10  filled with material F to be mixed, as indicated in FIG. D, material F to be mixed would leak. 
         [0054]    In  FIG. 2D , it is indicated that the container  10  is then turned upside down by a rotational movement. That is, the container  10  is turned such that it points downward the lid  20 . This intermediate position is represented in  FIG. 2E . 
         [0055]    Then, the container  10  is connected, in this position, with the drive device  30 . This is performed by a simple manual plugging and pressing of the container  10  against a connection area  31  of the drive device  30  which is arranged on the top side. 
         [0056]    In  FIG. 2F , a snap-shot is shown, in which the container  10  is connected with the drive device  30 . 
         [0057]    Upon connecting the container  10  with the drive device  30 , the lid  20  is immerging wholly or partly into the connection area  31 . At the same time, the stirring device  40  is connected with the drive device  30  as concerns the drive. This connection with respect to the drive makes sure a mechanical coupling between a drive, which is arranged at or in the drive device  30 , and the stirring device  40 . 
         [0058]    If the drive is then operated or activated, a rotational movement of the drive around a vertical axis is generated. This rotational movement is transferred mechanically to a vertical axis R 1  of the stirring device  40  and the stirring device  40  begins to rotate. In  FIG. 2F , the rotational movement of the stirring device  40  is represented by the arrow P 2 . 
         [0059]    The rotational movement P 2  of the stirring device  40  causes an interaction of the stirring device  40  with the material F to be mixed. After a desired result has been achieved, the container  10  can be detached. Upon detaching, the connection as concerns the drive is disconnected. This moment is shown in  FIG. 2G . Then, the container  10  can be reversed, as shown in  FIG. 2H . 
         [0060]    The material F to be mixed can then, after the removal of the special lid  20 , be e.g. drunk or another lid (e.g. the original lid  11 ) can be put on. 
         [0061]    By the steps mentioned, it is possible to prepare for example a milk shake with only a few manipulations as follows:
       a. filling the container  10  through the opening  13  with a material F to be mixed composed of milk and raspberries ( FIG. 2B ),   b. closing the opening  13  with the lid  20  ( FIG. 2C ),   c. turning the container  10  together with the lid  20  ( FIGS. 2D and 2E ),   d. putting on the container  10  together with the lid  20  in the connection area  31  of the drive device  30  ( FIG. 2F ),   e. activating the drive device  30  so as to generate a rotational movement around a drive axis (vertical axis) ( FIG. 2F ),   f. force-fitly transmitting the rotational movement of the drive axis to an axis R 1  of the stirring device  40  ( FIG. 2F ),   g. mixing the material F to be mixed by means of the rotation of the stirring device  40  ( FIG. 2F ),   h. separating the container  10 , together with the lid  20 , from the drive device  30  ( FIG. 2G ),   i. opening the lid  20  so as to get access to the material F to be mixed in the interior of the container  10 .       
 
         [0071]    This procedure takes only a few seconds and only a few dishes are contaminated, which would have to be cleaned afterwards. 
         [0072]    In a particularly preferred embodiment, the container  10  has an (exterior) thread  12  in the area of the opening  13 , as indicated in  FIG. 2B . The lid  20  then has a corresponding complementary (inner) thread  22 , as shown in  FIG. 6B . 
         [0073]    The lids  20  according to the invention are characterized in that they have a passage  23  for an axis, which enables driving the stirring device  40 , which is located in the interior of the container  10  when the lid  20  is closed, from the exterior of the container  10 . Details of different lids  20  of this kind are shown in the  FIGS. 3A ,  3 B,  3 C,  6 A,  6 B and  7 . A rotationally symmetrical recess  25  is conceived on the top side of the lid  20 . The passage  23  for the axis opens out into this recess  25 . A plate-shaped catch  41  sits in the recess  25  in the lid  20  as mounted ready for use (i.e. as soon as the stirring device  40  is fixedly integrated in the production/assembling), which catch  41  comes in interaction with a counter piece  36  on the side of the drive. 
         [0074]    The thread  12  of the container and the thread  22  of the lid  20  are formed such that by screwing on the lid  20 , the opening  13  is closeable tightly. 
         [0075]    The invention preferably makes use of a standardized thread  12 ,  22 , so that commercial products from other suppliers can be applied for the purpose of the invention. In that way, for example bottles for sports and leisure time can be applied for mixing by a simple screwing on of the lid  20 . 
         [0076]    By means of the  FIGS. 3A to 3C , three different embodiments of the connection as concerns the drive between the drive, here in the form of a motor M, and the stirring device  40  are shown. Schematized cross sectional views are concerned, each of which allows recognizing a lid  20 , the stirring device  40  and parts of a drive device  30 . 
         [0077]    In  FIG. 3A , an embodiment is shown, in which the stirring device  40  has a stirring device axis  42  and a stirring body  43 . The stirring device axis  42  extends through a passage  23  for the axis. A rotationally symmetrical recess  25  is provided on the outer side of the lid  20 . A plate-shaped catch  41 , which is connected with the stirring device axis  42 , sits in this recess  25 . 
         [0078]    The lid  20  is plugged, with its top side to the fore, in a recess  32  provided on the top side of the drive device  30 . The recess  32  is a part of the connection area  31  of the drive device  30  arranged on the top side. The recess  32  has a conical side wall. The slope of the conical sidewall corresponds approximately to the slope of the conical outer wall  26  of the lid  20 . 
         [0079]    In the housing  33  of the drive device  30 , an opening  34  for an axis is provided, through which a vertical axis  35 , which is driven by the drive M, extends. At the end of the vertical axis  35 , a counter piece  36  on the drive side is arranged, which comes in force-fitting interaction with the plate-shaped catch  41 , when the container  10 , together with the lid  20 , is put on or plugged on. 
         [0080]    In  FIG. 3B , a similar embodiment is shown, the elements of which correspond substantially with the elements of  FIG. 3A . However here, the plate-shaped catch  41  has a slightly concave surface. The counter piece  36  on the drive side has a complementary surface, which is shaped convexly. The plate-shaped catch  41  and the counter piece  36  engage with each other. Also here, a force-fit interaction is generated. An embodiment is particularly preferred, in which the concave surface of the catch  41  is formed rubber-elastically, similar as in a suction cup. 
         [0081]    The embodiments of  FIGS. 3A and 3B  are characterized in that the container  10 , together with the lid  20 , can be deposited upside down, because the lid  20  has a straight surface  24 . The plate-shaped catch  41  does not protrude beyond the surface  24 . 
         [0082]    In  FIG. 3C , a similar embodiment is shown, the elements of which correspond substantially with the elements of the  FIG. 3A  and  FIG. 3B . However here, the plate-shaped catch  41  has a convex surface. The counter piece  36  on the drive side has a complementary surface, which is shaped concavely. The plate-shaped catch  41  and the counter piece  36  engage with each other. Also here, a force-fit interaction is generated. An embodiment is particularly preferred, in which the concave surface of the counter piece  36  is formed rubber-elastically, similar as in a suction cup. 
         [0083]    A lid  20  according to  FIG. 3C  is particularly suited for the case that a permanent leak tightness cannot be ensured to 100%. Since the lid  20  is not flat due to the convex (bulgy) catch  41 , the container  10 , together with the lid  20 , cannot be deposited upside down. 
         [0084]    Further optional details can be recognized in the  FIGS. 3A to 3C . For example, the lid  20  has a conical extension  27 , which extends into the interior of the container  10 . By means of this extension  27 , the stirring device  40  sits further in the interior of the container  10 . The sloped side surface of the conical extension  27  facilitates the cleaning of the lid  20  and the drive device axis  42  can be sealed better with respect to the lid  20 . 
         [0085]    The stirring device  40  may comprise one or several stirring blades  43  (as indicated in  FIGS. 3A to 3C ), one or several stirring arms, one or several blade edges. A combination of these elements is also possible. 
         [0086]    For particular fields of application, the lid  20  together with the stirring device may be designed as a disposable. Thus, paints or other multi component material to be mixed may be mixed and used for example in the fields of construction and hobby. 
         [0087]    The drive device  30  may either be equipped with an own drive M, for example in the form of a motor, or the drive device  30  may be coupled to the drive of another device. In this respect, a connection with a kitchen equipment or a coffee machine comprising a crushing gear is particularly advantageous. In this case, the equipment or machine may have a connection area, analogously to the connection area  31 . If required, the container  10  together with the lid  20  is set on at the connection area so as to activate the stirring device  30  by means of a motor of the equipment or machine. 
         [0088]    Special measures are proposed in order to reduce the risk of misuse or the risk of injury. Examples in this respect are shown in the  FIGS. 4A ,  4 B,  5 A,  5 B and in  FIG. 7 , which may also be combined. 
         [0089]    The drive of the apparatus  100  shall preferably not be actuated by a separate switch, but rather the motor M shall be switched on automatically upon putting on the container  10  together with the lid  20 . 
         [0090]    A first example in this respect is shown in the  FIGS. 4A and 4B . For reasons of simplicity, only some basic elements are represented. Here, the motor M is seated on a spring  51  or a spring-elastic element. A switch S 1  (also called pressure switch) is arranged such that the switch is closed only when a pressure F 1  is applied and the current supply of the motor M is established. In  FIG. 4B  it is indicated that the motor M is pushed in the direction of the work surface T by the pressure F 1 , which acts on the axis  35  via the container  10  and the lid  20 . Thereby, the spring  51  is compressed and the switch S 1  is closed mechanically. 
         [0091]    A second example is shown in the  FIGS. 5A and 5B . For reasons of simplicity, only some basic elements are represented, too. Here, the motor M stands fixedly on a work surface T. However, the casing  33  is seated on a spring  51  or on spring-elastic elements. A switch S 1  is arranged such that the switch is closed and the current supply to the motor M is established only when applying a pressure F 1 . In  FIG. 5B  it is indicated that by the pressure F 1 , which acts through the container  10  and the lid  20  on the casing  33 , the casing  33  is pushed in the direction of the work surface T. Thereby, the springs  51  are compressed and the switch S 1  is closed mechanically. 
         [0092]    The two embodiments of the  FIGS. 4A ,  4 B,  5 A and  5 B have proven to be safe and reliable. It is also conceivable that a user puts on the lid  20  together with the stirring device  40  on the connection area  31  and applies pressure F 1 . In this case, injuries may occur, because the drive M drives the stirring device  40  as soon as the switch S 1  is closed. Thus, a force-fit connection between the elements  41  and  36  is preferably employed, which avoid that too strong a torque acts on the stirring device  40 . When blocking the stirring device  40  with the fingers, the force-fit connection acts as a friction clutch, so as to avoid more serious injuries. 
         [0093]    The embodiment, which is described in the following with respect to the  FIGS. 6A ,  6 B and  7 , offers still more safety. A first element of a magnet switch S 2  is conceived in the lid  20 . The second element of the magnet switch S 2  is seated in the casing  33  close to the connection area  31  (see  FIG. 7 ). In the cross section in  FIG. 6B , it can be recognized that a metal ring  28  is seated for example on an elastic ring  29  in the lid  20 . When fixedly screwing on the lid  20  on the container  10 , the upper edge of the container  10  presses on the annular groove of the lid  20 . By means of the pressure, which is exerted thereby, the metal ring  28  in the lid  20  is pressed upwards in the direction of the top side  24  of the lid and the elastic ring  29  is compressed. If now the container together with lid  20  fixedly screwed thereon is brought in the connection area  31 , then the metal ring  28  is seated relatively close to the second element of the magnet switch S 2 . The immediate spatial proximity of the two elements leads to an interaction, which closes the magnet switch S 2 . Only when this magnet switch S 2  is closed, the second switch S 1  can supply current to the motor M by the application of pressure F 1 . 
         [0094]    This embodiment offers several safety aspects. On one hand, the apparatus  100  can not be operated with a wrong lid. On the other hand, a tight closing is ensured, because only when screwing on the lid  20  sufficiently firmly, the metal ring  28  is pushed sufficiently close in the direction of the top side  24  of the lid. Especially however, the apparatus  100  can only be operated, when the lid  20  seals a container  10 . The lid  20  alone can not activate the switch mechanism, because the distance between the metal ring  28  and the switch S 2  is too large. The elastic seating by means of the elastic ring  29  puts the metal ring  28  back each time. It is an advantage of this embodiment, that no constructional modifications of the container  10  are required. The safety mechanism works with each container  10  which has a standard thread  12 . 
         [0095]    Preferably, the switch S 1  and the switch S 2  are connected in series, which means that the motor M is supplied with current only when both switches are closed. That is to say, only when the right lid  20  with built-in first element consisting of the metal ring  28  and elastic ring  29  is connected together with a suitable container  10  and only when this combination consisting of the lid  20  and the container  10  is correctly put on in the connection area and only if pressure F 1  is applied, then the motor M starts to rotate. 
         [0096]    A drive device  30 , which comprises a so-called regulation switch S 3  instead of a pure pressure switch S 1 , is particularly preferred. This regulation switch S 3  is integrated in the drive device  30  such that by pushing on the container  10 , a pressure force F 1  acts on the drive device  30 . This action operates the regulation switch S 3  so as to connect the motor M with the current supply. By pushing more strongly, the pressure force on the drive device  30  is increased and the regulation switch S 3  supplies the motor M with current such that the motor rotation speed increases. Optionally, the regulation switch S 3  and the switch S 2  can be connected in series, as described above. 
         [0000]    
       
         
               
             
               
               
               
             
           
               
                   
               
               
                 Reference numerals 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 special container 
                 1 
               
               
                   
                 lid 
                 2 
               
               
                   
                 stirring device 
                 3 
               
               
                   
                 drive unit 
                 4 
               
               
                   
                 cap 
                 5 
               
               
                   
                 container 
                 10 
               
               
                   
                 lid 
                 11 
               
               
                   
                 outer thread 
                 12 
               
               
                   
                 opening 
                 13 
               
               
                   
                 special lid 
                 20 
               
               
                   
                 complementary thread 
                 22 
               
               
                   
                 passage of axis 
                 23 
               
               
                   
                 top side of the lid 
                 24 
               
               
                   
                 recess 
                 25 
               
               
                   
                 conical outer wall 
                 26 
               
               
                   
                 conical extension 
                 27 
               
               
                   
                 metal ring 
                 28 
               
               
                   
                 elastic ring 
                 29 
               
               
                   
                 drive device 
                 30 
               
               
                   
                 connection area 
                 31 
               
               
                   
                 recess 
                 32 
               
               
                   
                 casing 
                 33 
               
               
                   
                 opening for the axis 
                 34 
               
               
                   
                 vertical axis 
                 35 
               
               
                   
                 counter piece 
                 36 
               
               
                   
                 stirring device 
                 40 
               
               
                   
                 plate-shaped catch 
                 41 
               
               
                   
                 axis of stirring device 
                 42 
               
               
                   
                 stirring body/stirring blades 
                 43 
               
               
                   
                 spring seating 
                 51 
               
               
                   
                 material to be mixed 
                 F 
               
               
                   
                 force 
                 F1 
               
               
                   
                 motor 
                 M 
               
               
                   
                 rotational movement 
                 P1, P2 
               
               
                   
                 vertical axis 
                 R1 
               
               
                   
                 switch 
                 S1 
               
               
                   
                 magnet switch 
                 S2 
               
               
                   
                 regulation switch 
                 S3 
               
               
                   
                 table/work surface 
                 T