WO2011069768A1

WO2011069768A1 - Kitchen appliance having a stirring device

Info

Publication number: WO2011069768A1
Application number: PCT/EP2010/067270
Authority: WO
Inventors: Uros Semeja; Samo Golavsek; Roman Danijel
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2009-12-09
Filing date: 2010-11-11
Publication date: 2011-06-16
Also published as: SI2509480T1; DE102009057448A1; RU2532158C2; EP2509480A1; ES2709513T3; EP2509480B1; PL2509480T3; RU2012123870A

Abstract

The invention relates to a kitchen appliance, in particular a stand, hand or rod mixer, having at least one stirring device (1), in particular a whisk, for processing foods, wherein the stirring device (1) comprises a drive shaft (10), having a coupling point (20) for coupling to the kitchen appliance arranged on one end thereof and having at least one loop-shaped bracket (11, 15) having an operative surface (14) arranged on the other end (12) thereof, such that at least one operative body (13) is arranged on the bracket (11, 15) which enlarges the operative surface (14) of the food to be processed. The invention is particularly suited for kitchen appliances having two stirring devices which are driven in opposite directions by an electrical motor. It is likewise conceivable, however, that the invention can be used in a handheld appliance, in particular in a hand or rod mixer.

Description

Kitchen utensil with stirring device

description

Background of the invention

The present invention relates to a kitchen appliance, in particular food processor, hand or hand blender, with at least one stirring device, in particular whisk, for processing food, wherein the stirring device comprises a drive shaft, at one end of a coupling point for coupling with the kitchen appliance and at the other end at least a loop-shaped bracket is arranged with an active surface. State of the art

As is known, during whisking, foods such as, in particular, liquid or semi-liquid ingredients and mixtures are whipped to foam or finely blended or homogenized. Lump formations, such as those caused by stirring with a spoon, can thereby be largely avoided, the consistency of the finished food depends on the nature of the ingredients and the speed of the whirring and its configuration.

DE 1 429 978 A1 discloses a whirl such that, during whipping, a lifting effect is exerted on the material to be processed, so that at that time a relatively mild and nevertheless strongly air-injecting impact effect could be achieved. However, the well-known, widespread design of a whisk may not always meet the demands made on modern cooking today. An improved embodiment of a whisk is disclosed by EP 0 410 527 B1 for a food processor. The disclosed whisk has a good impact and mixing action on the mix to be processed by providing more than four arcuate straps, which are arranged laterally from the shaft of the whisk. The arcuate brackets have at their respective ends a connection to a ring which extends radially around the shaft of the whorl. The arcuate brackets are distributed symmetrically in the circumferential direction of the circumferential ring. In order to improve the impact effect and the mixing effect, EP 0 410 527 B1 proposes the distribution of a multiplicity of arc-shaped stirrups along the ring, which are distributed alternately around the ring in the axial direction. However, the use of a variety of arcuate temples is not universally applicable and difficult to clean.

The problem underlying the invention

The invention has for its object to provide a comparison with the prior art improved kitchen appliance, which universally applicable, easy to clean and achieved esp. Shortened processing time at least consistent or preferably improved mixing results compared to known kitchen appliances.

Inventive solution

The solution of the object is achieved by a kitchen appliance with the features of claim 1. The kitchen appliance according to the invention builds on generic kitchen appliances in that on the bracket at least one active body is arranged, which increases the effective area on the food to be processed. The active body has the advantage that it causes an increase in the effective area, which acts on the processed food or mix and so quickly and gently reaches the desired consistency. In the case of the rigging of foodstuffs such as, in particular, egg whites or cream, more air is at the same time smashed into the food by means of the at least one active body according to the invention, which leads to a shortening of the processing time with a comparably good result. Likewise, viscous foods can also be processed faster, since active bodies according to the invention can also better loosen them up and make it easier to incorporate or admix other additives.

Preferred embodiment of the invention Advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.

It is preferred that the at least one active body has a height, width and maximum length dimension in the ratio 1: 1: 2, in particular in the ratio 1: 1: 1, 5, preferably in the ratio 1: 1: 1. These dimensions provide an easily shaped active body that is easy to manufacture and effectively increases the effective area that acts on the food.

Preferably, the at least one active body is designed as a ball, cylinder, cuboid, pyramid, cube, tetrahedron or the like and arranged on the bracket. By selecting different geometric shapes, high processing efficiency can be achieved. Furthermore, the stirring device of a kitchen appliance according to the invention can be given an interesting and / or appealing appearance. In particular, a spherical active body is easy to produce. Due to its edge-free contour, it avoids scratching or damaging the back bowl, especially in hand-operated kitchen appliances such as blenders or hand blenders. Similar results are achieved with a cylindrical shape, which also can not damage the bowl. Preferably, the ball or cylinder diameter is about 5 mm and the diameter of the bracket about 2 mm. If cylindrical active bodies are used, the height of the cylinder is about 10 mm. However, other dimensions can be used according to the present invention. The cylindrical shape may, for example, also have an elliptical base surface which, due to the enlarged edge surfaces, advantageously further increases the desired active effect. Through the formation of the active body as a sphere, cylinder, cuboid, pyramid, cube and / or tetrahedron arise during operation of the stirring additional turbulence of the food, which effectively bring air into the food and let it be frothy. For example, if cubes or other edge-bearing bodies are used, the air impact into the food can be further improved and the processing time reduced.

According to a preferred embodiment of the invention, the at least one bracket is formed wire-shaped. The wire shape allows a favorable manufacturability; furthermore improves the final assembly of the stirring device. For example, the wire-shaped bracket can be biased inserted into the end of the drive shaft and then soldered. The bias of the strap causes a provisional fixation at the end of the drive shaft, which, for example, in a subsequent soldering without the use of other fixatives and / or handles are joining technique connected.

According to the invention, the at least one bracket is designed to be stiff. Thus, during operation, the stirrup can not deform by centrifugal forces, the stiffness ensuring an effective processing result on different foods, which has a universal use of the stirrer to the advantage.

It is preferred that the at least one bracket has a circular, square, rectangular, flat or otherwise profiled cross section. In the case of a circular cross section of the bracket, the active bodies can be easily placed during manufacture and then soldered. The active bodies may have a bore which can receive the bracket. As a result of the circular cross section, the active body can be easily moved to the desired location during assembly. However, for example, if a flat cross-section of the bracket is used, another shape of the bore can be selected so that the active body can be mounted against rotation on the bracket to be subsequently soldered. This can be particularly advantageous if the active bodies are not rotationally symmetrical, and thus their position on the bracket must have a certain orientation. This orientation can counteract the scratching of the processing bowl. Similar advantages arise in the use of square wires, which can also provide a security against rotation of the active body during pre-assembly. However, it is also conceivable that the dimensions of the bore is selected such that the bracket must be pushed with a certain force, which can also provide a prefixing of the active body. Subsequently, the active body are soldered, welded, glued or the like.

Furthermore, it is preferred that the bracket is made of a metallic material, in particular stainless steel, or a plastic. The use of metallic In addition to the advantages of cost-effective production, materials also offer their longevity. When using plastics, the production can be further simplified because, for example with the aid of an injection molding process integral plastic stirring devices can be sprayed or molded in whole or in part. For example, bracket and drive shaft can be integrally formed.

According to the invention, the at least one active body is preferably made of a metallic material, in particular stainless steel, or a plastic. Metallic active bodies are also characterized by a long-lasting use and can be easily attached to a metallic bracket. In particular, stainless steel can be used advantageously for the processing of food. This material is also dishwasher-safe, which simplifies cleaning after completion of the processing operation. However, if plastic materials are used for the active body, a Anspritzvorgang the active body to the or the bracket can be used. This has the particular advantage that the active body no longer needs to be subsequently soldered or otherwise fastened. This advantageously saves a production step.

It may also be preferred to form the surface of the active body smooth or corrugated. Smooth active bodies provide an easy-to-clean stirrer. Alternatively or cumulatively, a corrugation having active body can be provided on the bracket, which improve the processing result by a more effective turbulence and / or more efficient Lufteinschlag. As far as the Riffelfurchen are particularly rounded, they can also be easily cleaned by hand or in the machine.

Furthermore, the at least one active body can be made removable and / or replaceable. Thus, different moldings can be used for different purposes. In the case of damage to an active body targeted only the defective body can be exchanged or reused.

In a further embodiment of the invention, the stirring device has a plurality of brackets, in particular two brackets, which are arranged at the end of the drive shaft are. The use of multiple stirrups increases the processing efficiency of the food.

It is further preferred that the plurality of brackets each protrude from the end of the drive shaft and a common cross point, which is arranged on a rotational axis of the drive shaft has. This provides a symmetrical structure, which turns out to be advantageous in operation, since no imbalances can arise. Consequently, the drive device of the kitchen appliance can not be damaged. According to the invention, at least one of the brackets of the plurality of brackets preferably has at least two active bodies. Characterized in that at least one or preferably each bracket has at least two active body, a symmetrical structure can be produced, which also minimizes imbalances in operation. The arrangement of a plurality of active bodies makes it possible to provide a maximizable effective area which increases the efficiency of the food processing in terms of time and / or result. This is especially true when the active body of two straps arranged at different levels on the bracket and thus are in different levels in contact with the food. It has proven useful to arrange each two active body symmetrical to the axis of rotation of the drive shaft of the stirring device. The symmetrical design also has a positive effect on the drive unit of an electrically driven manual stirrer, since no disturbing imbalances can thus arise.

The present invention is particularly suitable for kitchen appliances with two stirring devices which are driven in opposite directions by an electric motor. However, it is also conceivable that the present invention in a hand-held device, especially in a hand or hand blender, use.

Brief description of the drawings Further advantageous embodiments will be described in more detail below with reference to an embodiment shown in the drawing, to which the invention is not limited.

They show schematically each in a side view, a perspective Ansoruch and in a plan view:

Fig. 1 a, 1 b, 1 c, a first embodiment of a stirring device according to the

Invention;

2a, 2b, 2c, a second embodiment of a stirring device according to the

Invention;

3a, 3b, 3c, a third embodiment of a stirring device according to the

Invention;

4a, 4b, 4c, a fourth embodiment of a stirring device according to the

Invention;

5a, 5b, 5c, a fifth embodiment of a stirring device according to the

Invention;

6a, 6b, 6c, a sixth embodiment of a stirring device according to the

Invention;

7a, 7b, 7c, a seventh embodiment of a stirring device according to the

Invention; and

8a, 8b, 8c an eighth embodiment of a stirring device according to the

Invention;

Detailed description of the figures In the following description of preferred embodiments of the present invention, like reference characters designate like or similar components.

Fig. 1 a shows in a side view; Fig. 1 b in a perspective view 1 b and Fig. 1 c in a plan view of a first embodiment of a stirring device according to the present invention for an electric or electromotive kitchen appliance, in particular a hand mixer (not shown). The illustrated stirring device is designed as a whorl 1, which is driven in rotation by an electric motor of the kitchen appliance. For this purpose, the stirring device 1 a coupling 20 which is arranged at the upper end of a drive shaft 10. The clutch 20 cooperates with another clutch which is arranged in the kitchen appliance, so that the electric motor can drive the stirring device 1. The clutch system thus drives the drive shaft 10 in rotation. Preferably, the drive shaft 10 is made of a metallic material, in particular stainless steel, which ensures high rigidity and ease of manufacture. However, it is also conceivable that the entire stirring device 1 together with the drive shaft 10 is integrally made of plastic or other suitable material.

The drive shaft 10 has at its end opposite the coupling 20 12 a first and a second loop-shaped bracket 1 1 and 15. The bracket 1 1, 15 may have in their length at least partially a constant cross-section. The bracket 1 1 and 15 may consist of a metallic material and are formed wire-shaped. By choosing the material can be ensured that the bracket 1 1, 15 are substantially rigid. The material, in particular wire-shaped material, is preferably selected so that no significant deformations of the stirring device 1 occur during operation. The end 12 of the drive shaft 10 is also rigidly and securely connected to the brackets 1 1 and 15. The connection in the region of the end 12 of the drive shaft 10 may have different configurations. So it is conceivable, for example, that the bracket 1 1 and 15 are made in one piece with the drive shaft 10, however, a solid coupling or a soldering or welding is also feasible. However, the connection should be such that, in operation, the stirrups 1 1 and 15 are fixedly connected to the end 12 of the drive shaft 10 in order to act on the food or the food accordingly. The brackets 1 1 and 15 are formed according to an exemplary embodiment wire-shaped and they consist of a metallic wire. The brackets 1 1 and 15 emerge from the end 12 of the drive shaft 10 and span substantially two surfaces, which preferably meet at right angles to each other. As a result, the two brackets 1 1 and 15 a cross point 21, in which they can be soldered together, for example. However, it is also possible that the two brackets have no contact point 21, so that the soldering process is omitted during manufacture. It is also conceivable that the two wire-shaped stirrups 1 1 and 15 can be hooked or wound into one another at the contact point 21. Furthermore, it is likewise conceivable for the stirring device to have further brackets 1 1, 15 which project symmetrically out of the end 12 of the drive shaft 10 and define a plurality or a plurality of planes crossing each other.

The wire-shaped metallic brackets 1 1, 15 have in the lower area, i. in their respective effective area 16, 17, several active bodies 13. The active bodies 13 may (as shown) be spherical and either also made of a metallic

Material or plastic. Other materials are conceivable.

Also possible is the one-piece design of the active body 13 together with the

Ironing 1 1 and 15. In this case, they could be produced, for example, by means of a casting process in a manufacturing step. Also, a soldering of the spherical active body 13 to the brackets 1 1 and 15 in a separate

Manufacturing step can be implemented or realized.

According to this exemplary embodiment of the present stirring device 1, the active bodies 13 in the lower third, corresponding to the first and second active region 17, 18, the bracket 1 1 and 15 are arranged. This lower third is also the area that is essentially in permanent contact with the food (ie food). By training or attaching the active body 13 on the wire-shaped brackets 1 1 and 15, consequently, the effective range 14 can be improved on the food ie increased. Accordingly, the impact of the stirring device 1 can be improved, since with the help of the active body 13 better air can be taken or incorporated into the food. For example, with this stirrer egg whites are beaten much faster than with conventional Stirrers. The brackets 1 1 and 15 are made stiff from a wire-shaped metallic material, so that their shape during rotation during operation of the hand mixer remains essentially unchanged. Thus, effectively, the entire torque of the electric motor is transmitted to the food without the brackets 1 1 and 15 undergoing elastic deformation caused by centrifugal forces. By the active body 13 according to the invention the effective area 14 is thus advantageously increased. Now, in addition to the surface of the wire-shaped bracket, the active region 14 of the respective active bodies 13 can also act on the food, which improves the quality and processing speed. In order to improve the circulation of the food during processing by the electromotive agitator, the bracket 1 1 and 15 each have a pair of inclined portions or inclined portions 18 and 19, which act in the rotation of the stirring device 1 as a screw or spiral. The stirrups, preferably wire stirrups 1 1 and 14, form a substantially rectangular shape, and the oblique portions (or portions) 18, 19 are oppositely inclined with respect to the axis R of the stirrer 1. The axis R is defined by the drive shaft 10. By the inclined or inclined portions 19, 20 a lifting effect is achieved on the good and beyond the impact effect is improved. As can be clearly seen in particular from FIG. 1 c, the two brackets 1 1 and 15 intersect in a point 21 located on the axis of rotation R and are connected to one another there by a soldering point, for example. Impact bodies 13 are arranged at different levels in the lower region of the stirrups 1 and 15, so that during operation the foodstuff is effectively processed by the active surfaces 14 during the processing operation. In a preferred embodiment, the active bodies 13 of the first wire-shaped bracket are arranged substantially in a horizontal section of the rectangular bracket 11. The horizontal portion corresponds to the portion which is defined substantially parallel to a bowl bottom during operation of the stirring device 1. In contrast, the active body 13 according to the invention can be arranged on the second bracket 15 in a vertical section which is perpendicular to the bottom of the dish. By forming the above-mentioned inclined portions 18, 19, the vertical portions may further have an inclined angle to the bottom of the bowl. Characterized that the active body 13 of the second bracket 13th However, they are arranged in the vertical or inclined region, they experience a faster rotational speed, since the radius is increased to the rotation axis R. Consequently, the effective area 14 of these active bodies 13 can be used at an increased processing speed. The stirring device 1 can be used for example in a hand mixer, but tools of a food processor can also be provided with the active body 13 according to the invention.

Advantageously, the active body 13 are soldered to the metallic wire bracket 1 1, 15. In the case of using spherical active body 13, they may have suitable holes through which the wire hanger 1 1, 15 are passed accordingly, in order subsequently to be soldered to this or connected in another method. If the wire hanger 1 1, 15, for example, another cross section, for example, an elliptical or square or the like, have, the active body 13 can be fixed better during assembly. The bore of the active body 13 usually has a round cross section, so that, for example, an elliptical or square cross section of the wire bracket 1 1 and 15 can cooperate with the round bore and the active body can therefore be prefixed to be subsequently soldered can. This facilitates assembly, since the active body 13 on the wire hanger can not slide back and forth uncontrolled. Similar results can be achieved with other cross-sectional profiles.

Figures 2a, 2b, 2c show three further views of a stirring device according to a second embodiment of the present invention. According to this second embodiment, the two brackets 1 1 and 15 each have four active bodies 13 in order to increase the effective area 14 to the food to be processed. The basic shape of the bracket 1 1 and 15 corresponds to the shape which is described in more detail in Figs. 1 a, 1 b, 1 c.

3a, 3b and 3c show a third embodiment of the present invention, in which the active bodies are cylindrically shaped and, similar to those in FIGS. 1a, 1b and 1c, are arranged in pairs on the respective brackets 11 and 15, respectively , The cylindrical shape of the active body 13 has an enlarged active surface 14 on the food, so that better results can be achieved. The bracket 1 1 and 15 are also in accordance with this third embodiment, wire-shaped and the active body 13 enlarge sections of the temple cross-section and that in the area where they are arranged. A similar effect can be achieved with spherical active body 13, as described in more detail in FIGS. 1 and 2. 4a, 4b and 4c show a further embodiment in which, as disclosed in the third embodiment, cylindrical active body 13 are used. In order to increase the effective area 14, in each case four active bodies 13 are used for the respective bracket 11 or 15. Figures 5a, 5b and 5c show a possible fifth embodiment of a stirring device according to the present invention. In contrast to the above-mentioned embodiments, the bracket 1 1 and 15 have no oblique sections 18 and 19 and to increase the effective area 14 are here also spherical active body in pairs on the brackets 1 1 and 15 respectively. Fig. 6a, 6b and 6c show a further embodiment of the stirring device, come in the four spherical active body 13 per bracket 1 1 and 15 are used.

FIGS. 7a, 7b and 7c and 8a, 8b and 8c correspond to the above-mentioned fifth embodiment, again using cylindrical active bodies 13 for increasing the effective area 14.

By using the active body according to the invention on a stirrup of the stirring device, the active surface can be effectively increased to a food, especially food, so that when using the stirring device in a hand mixer, blender, blender or a food processor, the processing time can be shortened advantageous. LIST OF REFERENCE NUMBERS

1 stirrer or Küchengerutterührvorrichtung

10 drive shaft

1 1 first bracket

12 drive end

13 active bodies

14 effective area

15 second bracket

16 first effective range

17 second effective range

18, 19 inclined sections

20 coupling or coupling point

21 cross point or contact point

Claims

Kitchen appliance, in particular food processor, hand or hand blender, with at least one stirring device (1), in particular whisk, for processing food, wherein the stirring device (1) comprises a drive shaft (10) at one end of a coupling point (20) for coupling at least one loop-shaped bracket (1 1, 15) with an active surface (14) is arranged with the kitchen appliance and at the other end (12), characterized in that at least one active body (13) is arranged on the bracket (1 1, 15) , which increases the effective area (14) on the food to be processed.

Kitchen appliance according to claim 1, characterized in that the at least one active body (13) has a height, width and maximum length dimension in the ratio 1: 1: 2, in particular in the ratio 1: 1: 1, 5, preferably in the ratio 1: 1 : 1.

Kitchen appliance according to claim 1 or 2, characterized in that the at least one active body (13) as a ball, cylinder, cuboid, pyramid, cube or tetrahedron on the bracket (1 1, 15) is formed.

Kitchen appliance according to one of the preceding claims, characterized in that the at least one bracket (1 1, 15) is wire-shaped.

Kitchen appliance according to one of the preceding claims, characterized in that the at least one bracket (1 1, 15) is rigid.

Kitchen appliance according to one of the preceding claims, characterized in that the at least one bracket (1 1, 15) has a circular, square, rectangular, flat or otherwise profiled cross-section.

Kitchen appliance according to one of the preceding claims, characterized in that the bracket (1 1, 15) made of a metallic material, in particular stainless steel, or a plastic.

8. kitchen appliance according to one of the preceding claims, characterized in that the at least one active body (13) made of a metallic material, in particular stainless steel, or a plastic.

Kitchen appliance according to one of the preceding claims, characterized in that the surface of the active body (13) is smooth or ribbed.

10. Kitchen appliance according to one of the preceding claims, characterized in that the at least one active body (13) in an active area (16, 17) which is in contact with the food, is arranged.

1 1. Kitchen appliance according to one of the preceding claims, characterized in that the at least one active body (13) is removable and / or replaceable formed.

12. Kitchen appliance according to one of the preceding claims, characterized in that the stirring device (1) has a plurality, in particular two, bracket (1 1, 15).

Kitchen appliance (1) according to claim 12, characterized in that the brackets (1 1, 15) have a common on the rotation axis (R) of the drive shaft (10) arranged cross point (21).

14. kitchen appliance (1) according to one of the preceding claims, characterized in that at least one bracket (1 1, 15) at least two, preferably four, active body (13).

15. Kitchen appliance (1) according to claim 14, characterized in that the at least two active bodies (13) are arranged symmetrically to the axis of rotation (R) of the drive shaft (10).