Food preparation equipment with detachable tools

Abstract

The present invention relates to a food preparation device having a rotatable tool 1 for chopping and / or mixing food in a food preparation container 2, wherein the tool 1 can be detachably connected to a shaft 3, which extends from the outside of the food preparation container 2 through a through-portion 4 toward the tool 1 inside the food preparation container 2, so as to be able to drive the tool 1 for rotation. A locking mechanism is provided for lockingly connecting the tool 1 to the shaft 3, and the locking mechanism is arranged so that the connection between the tool 1 and the shaft 3 can be loosened and / or locked from the outside of the food preparation container 2. The present invention also relates to an anchoring assembly 10 for a food preparation device. This makes it possible to easily and comfortably remove the prepared food from the food preparation container 2.

Description

Technical Field

[0001] The present invention relates to a food preparation device having a rotatable tool for chopping and / or blending food in a food preparation container. The tool can be detachably connected to a shaft, which extends from the outside of the food preparation container through a through-portion toward the tool located inside the food preparation container so as to be able to drive the tool. A locking mechanism is provided for lockingly connecting the tool to the shaft. The present invention also relates to an anchoring assembly for a food preparation device. Background Art

[0002] In food preparation appliances, such as kitchen multi-purpose machines, a stirring blade unit is usually integrated into a through-hole in the bottom of the pot as a tool. However, the stirring blade gets in the way when removing the food, and the user may also damage the stirring blade. Some food preparation appliances allow the stirring blade unit to be removed from the through-hole, but the pot will become leaky as a result. Summary of the invention

[0003] The object of the present invention is to provide a further improved food preparation device.

[0004] This object is achieved by a food preparation device according to the main claim and an anchoring assembly for a food preparation device according to the subclaim. Advantageous embodiments are described in the dependent claims.

[0005] A food preparation device having a rotatable tool for chopping and / or mixing food in a food preparation container is used to achieve the above object. The tool can be detachably connected to a shaft. The shaft extends from the outside of the food preparation container through a penetration toward the tool inside the food preparation container so that the tool can be driven. If the tool is driven by the shaft, the tool rotates. A locking mechanism is provided for lockingly connecting the tool to the shaft. The locking mechanism is arranged so that the connection between the tool and the shaft can be loosened (or removed) and / or locked from outside the food preparation container.

[0006] As a result, the user can release (or remove) the tool from the outside after preparing the food without having to come into direct contact with the prepared food. The removed tool can then be removed from the food preparation container, for example using a fork or the like. The prepared food can then be removed from the food preparation container without being hindered by the tool. This also achieves the advantage that the interior of the pot and the tool can be completely cleaned manually for the next use, particularly easily and quickly, without having to disassemble the container with the tool into several parts.

[0007] In order to achieve the above object, another aspect of the present invention relates to an anchoring assembly for a food preparation device as described above. The anchoring assembly is arranged to be anchored in a food preparation container of the food preparation device, i.e., anchored in such a way that the shaft of the anchoring assembly can extend from the outside of the food preparation container through a penetration, which leads into the interior of the food preparation container. The shaft can be used to drive, i.e., rotate a tool inside the food preparation container for stirring and / or chopping food. The anchoring assembly comprises an anchoring element and an anchoring device for anchoring the anchoring element to the food preparation container. The anchoring device is arranged between an operating element and a locking element along the axis of rotation of the shaft, wherein the operating element and the locking element are connected to each other in such a way that the operating element and the locking element can move together relative to the anchoring element. As a result, the prepared food can be taken out of the food preparation container without being hindered by the tool for stirring and / or chopping. The anchoring assembly for the food preparation device can seal the penetration in the container bottom of the food preparation container in the anchored state and drive the tool for chopping and / or stirring by means of the shaft. In particular, the anchoring causes a sealed, rotationally fixed and / or axially fixed connection. The shaft can in turn be driven at the other end by a drive. The following description relates to the food preparation device described above for achieving the stated purpose and an anchoring assembly for the same food preparation device.

[0008] The tool has an axis of rotation. The tool is connected to the shaft in a state ready for operation in a non-rotatable manner, in particular by means of a form fit. The locking is preferably an axial locking. The axial locking between the tool and the shaft can achieve such a locking that the tool and the shaft are prevented from loosening due to axial relative movement away from each other. The tool can be multi-piece. The tool can, for example, include at least one stirring tool, which is fixedly mounted on a connecting shaft. The connecting shaft can in turn be connected to the shaft in a non-rotatable manner, in particular by means of a form fit. Preferably, the stirring tool is a radially extending blade for chopping and stirring. Preferably, the tool has at least two or four stirring tools arranged in an offset manner around the axis of rotation. In order to chop and / or stir the food, the tool is located in a food preparation container and is driven to rotate via the shaft there. In particular, the tool is a component of a tool assembly.

[0009] The shaft is a cylindrical rotating body. The shaft and the tool preferably have the same axis of rotation. The shaft can have one or more shoulders, for example for a ball bearing seat or as a guard. The shaft extending from the outside of the food preparation container through the penetration toward the tool inside the food preparation container can transmit the drive torque from the drive motor outside the food preparation container to the tool inside the food preparation container. The penetration leads from the outside into the interior of the food preparation container. In particular, the penetration is formed by a closed surrounding wall in the bottom of the container. The penetration preferably extends axially and / or coaxially with the axis of rotation. In particular, the sealing element is arranged in the region of the container penetration so that in the ready-to-operate state or at least when the anchor assembly is anchored, no liquid can flow downward from the interior of the food preparation container to the outside. In one embodiment, the food preparation container and / or the tool comprises metal. Preferably, the stirring tool comprises metal or consists entirely of metal.

[0010] Typically, the entire interconnected space belongs to the interior of the food preparation container, which space is filled with a liquid in the ready-to-operate state, for example, if the ready-to-operate food preparation container is filled with a liquid. "Inside the food preparation container" refers to this space. The lower boundary of this space does not have to be flat and can, for example, include a cup-shaped recess or extend in a stepped manner, which lower boundary is essentially formed in part by the anchoring assembly in the ready-to-operate state. However, deviations from a flat course, such as in the case of a cup-shaped recess, would make the removal and cleaning of the food unnecessarily difficult.

[0011] If the tool is connected to the shaft in a non-rotatable manner, for example by placing the tool on the shaft and engaging the corresponding non-rotationally symmetrical connecting profile in a non-rotatable manner, the connection is not yet locked. Therefore, there is a movable mechanism that extends beyond the non-rotatable connection and can be locked by means of the movable mechanism. The movable mechanism can be placed in an unlocked position (released position) and a locked position by the movement of the components of the movable mechanism. In the locked position, the tool cannot be released and separated from the shaft. In the unlocked position, the tool can preferably be released and separated from the shaft in the axial direction. The movable mechanism is therefore called a locking mechanism.

[0012] The tool is preferably part of an assembly, i.e. a tool assembly. Advantageously, the shaft is part of an assembly, i.e. a part of an anchor assembly. This facilitates handling. An assembly is a unit comprising a plurality of parts. Handling can be facilitated by assembling a plurality of assembly components into a connected assembly. The parts of the assembly can be connected to each other in a form-fitting, force-fitting and / or material-fitting manner. The two assemblies, i.e. the tool assembly and the anchor assembly, in particular comprise parts that enable the shaft to be connected to the tool in a non-rotatable manner. The two assemblies in particular comprise parts that enable the shaft to be locked to the tool.

[0013] Preferably, the tool assembly comprises a rotary bearing for the tool, which enables the tool to rotate relative to one or more other parts of the tool assembly, in particular relative to the tool connecting element.

[0014] By means of the rotary bearing for the tool, the tool is preferably fixed in the axial direction relative to the one or more other components. Thus, a relative movement of the tool and one or more other components of the tool assembly in the axial direction is not possible.

[0015] Preferably, the anchor assembly comprises a rotational bearing for the shaft. The rotational bearing for the shaft enables the shaft to rotate relative to one or more other parts of the anchor assembly.

[0016] By means of a rotary bearing for the shaft, the shaft is preferably fixed in the axial direction relative to the one or more other components. Thus, a relative movement of the shaft and the one or more other components of the anchor assembly in the axial direction is not possible.

[0017] Preferably, the rotary bearing for the tool is a ball bearing. Preferably, the rotary bearing for the shaft is a ball bearing. In one embodiment, the tool assembly comprises a further shaft, which is referred to as the connecting shaft. The tool and the connecting shaft are preferably non-detachably connected axially and non-rotatably. Relative movement between the tool and the connecting shaft is not possible. The tool and the connecting shaft cannot be separated from each other without destruction.

[0018] If the tool assembly and the anchor assembly are connected and locked to each other in a rotationally fixed manner, the axis of the anchor assembly and the connecting axis are connected to each other in a rotationally fixed manner, i.e. preferably by a form fit, so that the axis of the anchor assembly and the connecting axis can be separated again particularly easily. The axis of the anchor assembly and the connecting axis can be rotated together relative to other parts of the two assemblies, in particular relative to the anchor element and / or the tool connecting element.

[0019] In one embodiment, the locking mechanism, i.e., in particular the anchoring assembly, comprises a locking element and an operating element. Starting from an unlocked position, the tool and the shaft can be locked to each other in a connected state by the locking element. Starting from a locked position, the tool and the shaft can be unlocked by the locking element. The locking element and the operating element are connected to each other. Based on the connection, the locking element can be moved by operating the operating element to its locked position and its unlocked position. The unlocked position is also referred to as the unlocked position or the released position (release position). The locked position is also referred to as the locked position. The movement of the operating element, such as rotation and / or translation, thus causes a particularly synchronous movement of the locking element and / or vice versa. The operating element for operating the locking mechanism is arranged outside the food preparation container and / or at the bottom of the anchoring device of the anchoring assembly. The locking element for lockingly connecting the tool to the shaft is arranged inside the food preparation container and / or at the top of the anchoring device of the anchoring assembly. "External" and "internal" refer to the state of the food preparation device ready for operation. The release and / or locking of the connection of the tool to the shaft from outside the food preparation container can thus be implemented particularly simply and compactly.

[0020] The operating element and / or the locking element are preferably disc-shaped. The operating element and / or the locking element preferably have at least one projection. If the operating element and the locking element are mounted rotatably about an axial direction, such a projection extends outward from the axis in particular in a radial direction. Alternatively or additionally, the operating element and / or the locking element are shaped like a lever.

[0021] In one embodiment, the connection between the operating element and the locking element is achieved by a connecting device, which extends inside the penetration and / or axially. Axial refers to the direction of the rotation axis, and if not otherwise specified, the rotation axis always refers to the rotation axis of the tool. In this way, a particularly compact structure can be achieved. The connection can be achieved by a movement-fixed connection of the connecting device to the operating element and the locking element. The locking element then performs the same movement as the operating element via the connection. Alternatively, it is possible in principle that the connecting device is a driver, so that only specific movements and / or movements within specific areas are transmitted from the operating element to the locking element via the connecting device. In general, rotational movements, torques, linear displacements and / or linear forces or preloads (biasing) can be transmitted via the connection.

[0022] In one embodiment, the connecting element extends in a notch of the anchoring element. The notch is called a connecting notch. The anchoring element then separates the connecting element from the wall of the penetration in the radial direction. Preferably, the connecting notch for the connecting element extends not only axially but also in the circumferential direction so that the connecting element does not prevent rotation relative to the anchoring element when the actuating element is rotated.

[0023] In one embodiment, the operating element and the connecting device form an L-shaped shape when viewed in a longitudinal section along the axis of rotation. In one embodiment, the connecting device and the locking element form an L-shaped shape when viewed in a longitudinal section along the axis of rotation. The operating element, the connecting device and the locking element preferably form a U-shaped shape in this order, preferably 90° tilted relative to the axis of rotation. In this order, it means that the three mentioned components respectively form three sides of the U-shaped shape that are connected vertically in succession. The axis of rotation is the axis of rotation of the tool. The L-shaped shape can benefit from the leverage effect when the locking mechanism is operated, for example, by rotating around the axis of rotation, and thus reduce the required operating force. The U-shaped shape can also achieve a particularly strong (robust) connection, not only for rotational movement but also for axial movement and / or axial preload. For example, the locking element can be pressed downward against the locking contour or held in a preloaded manner by the U-shaped shape, in which a pressure or preload force is applied to the operating element in the same direction. In other words, the U-shape makes it possible to introduce forces or movements outside the food preparation container in a very compact and strong manner, which can then cause locking and / or release inside the food preparation container via the closure element.

[0024] The L-shaped and / or U-shaped shape observed in the longitudinal section can relate to only one side of the axis of rotation, so that an L-shaped or U-shaped rod that is pivotally mounted around the axis of rotation is in principle possible. However, the disc-shaped body together with the vertically adjacent rod or cylinder can also form an L-shaped shape when observed in the longitudinal section. In one embodiment, the operating element and / or the locking element is disc-shaped. In one embodiment, the connecting device is preferably a straight strip. Preferably, the connecting device is connected to the operating element and / or the locking element in one piece. In particular, the strip connected to the locking element in one piece is fixedly mounted on the operating element as a connecting device with the other end, that is, immovably and preferably not detachably mounted without destruction. In one embodiment, there are at least two connecting devices, preferably three connecting devices, which are especially arranged in an identically shaped manner and evenly distributed around the axis of rotation.

[0025] In one embodiment, the actuating element and the locking element are in particular jointly movable, preferably axially displaceable and / or rotatable relative to the anchoring element. The relative movability relative to the anchoring element enables an axial prestressing of the actuating element or the locking element relative to the anchoring element, an axial lifting path of the actuating element or the locking element relative to the anchoring element and / or a simultaneous rotational movement relative to the anchoring element. For example, this enables a force-locking securing of the bayonet locking mechanism and / or the locking element in the locked position.

[0026] In one embodiment, the anchoring element has an anchoring device for anchoring to the food preparation container in a rotationally fixed and / or axially fixed manner. The anchoring element can thus be connected to the food preparation container or to the wall of the penetration in the container base of the food preparation container in a sealing and / or fixed, i.e. immovable manner. This makes it possible to achieve a stable support for the relative movement of the actuating element or the locking element relative to the anchoring element and thus the food preparation container.

[0027] In one embodiment, the anchoring device comprises a first non-rotationally symmetrical outer contour, which is used to connect in a form-fitting, non-rotatable manner to a non-rotationally symmetrical inner contour of the penetration. The two non-rotationally symmetrical contours are thus matched such that a form-fitting, non-rotatable connection is achieved when the two contours engage. This allows a strong rotational fastening that is particularly easy to produce.

[0028] In one embodiment, the anchoring device comprises a slit-shaped notch for accommodating the anchoring ring in an axial form-locking manner. In order to fix the anchoring element to the food preparation container in an axial form-locking manner, the anchoring ring can be inserted into the slit-shaped notch particularly easily in the narrowest space, preferably by rotating about the rotation axis, in particular in a bayonet-like manner. Preferably, the slit-shaped notch is introduced into a radial projection of the first non-rotationally symmetrical outer contour of the anchoring element, so that the anchoring ring matched to the slit-shaped notch can be rotated into the slit-shaped notch of the first non-rotationally symmetrical outer contour of the anchoring element. In other words, the slit-shaped notch makes it possible that in the region of the slit-shaped notch or in an axial position, the anchoring ring can be rotated relative to this in order to reach the slit-shaped notch, despite the fact that the first outer contour of the anchoring element is not a non-rotationally symmetrical shape.

[0029] In one embodiment, the anchoring ring has a non-rotationally symmetrical inner contour, which has a clearance fit for the non-rotationally symmetrical first outer contour of the anchoring element. In order to assemble the anchoring ring, the anchoring ring can be pushed from below via the non-rotationally symmetrical first outer contour along the anchoring element to the slit-shaped gap. In one embodiment, the at least one slit-shaped gap is matched to the non-rotationally symmetrical inner contour of the anchoring ring so that the anchoring ring can be rotated relative to the non-rotationally symmetrical first outer contour of the anchoring element into the slit-shaped gap of the non-rotationally symmetrical first outer contour of the anchoring element. The slit-shaped gap extends in the circumferential direction and / or has the shape of a shoulder or a groove. Preferably, the at least one slit-shaped gap is spaced apart from the stop in such a way that when the anchoring ring is rotated into the at least one slit-shaped gap of the anchoring ring, it is pressed against the wall, in particular the bottom of the container, so that the anchoring ring is elastically deformed. In this way, a preload and thus a particularly strong axial fixation can be achieved.

[0030] In one embodiment, if the anchoring ring is placed or rotated into the at least one slit-shaped recess, the wall, in particular the container bottom around the penetration, is fixed, tensioned or clamped between the stop, in particular the bottom side of the stop, and the anchoring ring. The anchoring element can thus be connected to the food preparation container in a particularly reliable axially fixed manner. In particular, the stop belongs to the anchoring element and / or is connected to the anchoring element in one piece. Preferably, the stop adjoins the first non-rotationally symmetrical outer contour of the anchoring element and / or at least partially has a diameter that is larger than the radial dimension of the first non-rotationally symmetrical outer contour of the anchoring element. Preferably, the stop is rotationally symmetrical, preferably disk-shaped.

[0031] In one embodiment, the locking mechanism is configured such that the locking element can be moved to a locking position for lockingly connecting the tool to the shaft or to a release position for releasing the locking connection between the tool and the shaft by operating the operating element. This enables reliable locking and releasing of the tool.

[0032] In one embodiment, a tool connecting element connected to the tool is provided for lockingly connecting the tool to the shaft, and the locking mechanism is provided in such a way that the locking element can be locked to the tool connecting element, in particular for producing an axially positively fixed connection. The tool can thus be connected to the shaft in a particularly reliable and user-friendly manner by means of the tool connecting element. In particular, the tool is axially fixed and / or rotatably connected to the tool connecting element.

[0033] In one embodiment, the tool connecting element has a locking profile that is particularly undercut and / or shoulder-shaped so as to lock with the locking element in the locked position. Reliable locking can be achieved in this way. In an alternative or supplementary embodiment, the locking profile is particularly ramp-shaped in the circumferential direction, preferably with a rise angle of 5° to 30°. If the locking element moves or rotates from the release position to the locked position, the locking element slides upward in the axial direction through the ramp-shaped locking profile. This increases the pressing force of the locking element against the locking profile. In this way, a particularly reliable fastening of the locking element in the locked position can be achieved. Preferably, the locking profile is located inside the space preferably surrounded by the tool connecting element in a bell shape.

[0034] In one embodiment, a clamping means, in particular a spring, is provided, and / or the locking mechanism is arranged in such a way that the clamping means axially preloads the locking element, in particular relative to the anchoring element. This allows a particularly reliable fastening in the locked position. In particular, the clamping means is arranged on the bottom side of the radially protruding, non-rotationally symmetrical first outer contour and is pressed directly against the upper side of the actuating element. Preferably, a receiving recess for the clamping means is provided in the actuating element, which preferably extends both axially and in the circumferential direction, so that when the actuating element is rotated, the clamping means does not hinder the rotation relative to the anchoring element. In one embodiment, the clamping means is spaced apart from the axis of rotation by a radial distance which is smaller than the radius of the through-opening of the food preparation container.

[0035] In one embodiment, the anchoring element has a second non-rotationally symmetrical outer contour for the form-fitting, non-rotatably fastening of the tool connecting element and / or the tool connecting element comprises a non-rotationally symmetrical inner contour, which is designed and / or adapted to the second non-rotationally symmetrical outer contour in such a way that the tool connecting element can be plugged onto the second non-rotationally symmetrical outer contour. This allows a particularly secure rotational fastening between the tool connecting element and the anchoring element and thus the food preparation container. In one embodiment, the stop is located axially, in particular directly, between the first non-rotationally symmetrical outer contour and the second non-rotationally symmetrical outer contour and / or has a larger diameter than the second outer contour.

[0036] In one embodiment, the locking mechanism is designed such that the actuating element is rotated in order to lock the connection of the tool to the shaft so that the locking element is rotated from the release position into the locking position and is thereby moved axially, i.e. relative to the anchoring element, by means of the ramp-shaped locking contour, while simultaneously overcoming the preload force of the clamping means. The axial displacement makes it possible for the locking element to be placed in a particularly large overlap with the undercut locking contour in the locking position, since the substantially non-elastic locking element, the connecting means, the actuating element and the anchoring element cannot provide sufficient elastic deformation for sliding onto the ramp-shaped locking contour. In particular, the ramp-shaped locking contour is supported on the anchoring element, in particular on the upper side of the stop, by the bottom side of the tool connecting element, which preferably lies flat in a sealing manner. The preload force of the clamping element is thereby transmitted to the upper side of the stop of the anchoring element inside the food preparation container and to the bottom side of the first non-rotationally symmetrical outer contour of the anchoring element outside the food preparation container. In one embodiment, the preload force is not transmitted to the food preparation container.

[0037] In one embodiment, an auxiliary operating device, in particular a foot of the food preparation container, is provided for operating the operating element, and / or the locking mechanism is arranged such that the auxiliary operating device can be rotated relative to the food preparation container into an operating position for locking the connection of the tool to the shaft and / or can be rotated relative to the food preparation container out of the operating position for releasing the locked connection of the tool to the shaft. This allows a particularly flexible manual locking and releasing for the user. If the auxiliary operating device is a foot, the foot also has a dual function. In particular, the foot is axially fixedly connected to the food preparation container in the operating position and / or is released from the food preparation container after being rotated out of the operating position. Typically, the food preparation container can be placed on a surface with the help of the foot and / or can be received in a receptacle of the food preparation device for operation.

[0038] In one embodiment, the non-rotationally symmetrical first outer contour of the anchoring element, the non-rotationally symmetrical second outer contour of the anchoring element, the non-rotationally symmetrical outer contour of the locking element, the non-rotationally symmetrical outer contour of the shaft interface, and the non-rotationally symmetrical inner contour of the tool connecting element, the non-rotationally symmetrical inner contour of the anchoring ring, the non-rotationally symmetrical inner contour of the penetration and / or the non-rotationally symmetrical inner contour of the manipulation aid meet at least one of the following features. According to the first feature, the non-rotationally symmetrical inner or outer contour is star-shaped and / or has at least two and / or up to ten radial notches or protrusions. According to the second feature, the radial notches or protrusions are formed identically. According to the third feature, the radial notches or protrusions are arranged evenly distributed around the periphery, so that in particular an inner or outer contour that can be reproduced (abbilden) itself in multiple angular positions can be obtained. According to the fourth feature, the inner or outer contour is continuously without edges. According to the fifth feature, the inner and outer contours have corresponding contours that allow manual folding (Ineinanderschieben). According to the sixth feature, all the mentioned inner contours and outer contours have the same contour curve, but may have different scalings. According to the seventh feature, all the mentioned outer contours and / or inner contours coincide.

[0039] In one embodiment, the anchoring element, the manipulating element, the connecting means, the locking element and the shaft are components of the anchoring assembly. This can reduce the number of separate units. In one embodiment, the tool connecting element and the tool are components of the tool assembly. The user thus has to operate fewer parts.

[0040] Another aspect of the invention relates to a method in which the foot is rotated relative to the food preparation container in order to release the tool for chopping and / or mixing from the shaft, which can remain anchored in a sealing manner in the container base of the food preparation container. This makes it possible to achieve a high level of user comfort.

[0041] Another aspect of the invention relates to a method in which the anchoring element is axially fixed to the food preparation container in a form-fitting manner by rotating the anchoring ring. A compact and user-friendly fixing is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The following also describes various embodiments of the present invention in more detail with the aid of the drawings, wherein various features can be combined with the claimed technical solution. The claimed scope of protection is not limited to the various embodiments.

[0043] In the figure:

[0044] Figure 1 An exploded view showing portions of a food preparation apparatus;

[0045] Figure 2 A schematic diagram showing a tool assembly;

[0046] Figure 3 A schematic diagram showing a released position of a locking element;

[0047] Figure 4 A schematic diagram showing a locked position of a locking element;

[0048] Figure 5 showing a cross-sectional view of an anchor assembly;

[0049] Figure 6 A longitudinal section through a food preparation container is shown with a tool connected in a locking manner. DETAILED DESCRIPTION

[0050] Figure 1A food preparation container 2 and a tool assembly 11 with a tool connecting element 18 and a tool 1 for chopping and / or stirring food, which can be rotated about an axis of rotation 9, are shown. In addition, an anchor assembly 10 is shown for sealing anchoring in a through-hole 4 in a container bottom 16 and for transmitting a torque to the tool 1 from an electric drive (not shown), which can be connected via a shaft interface 32. The anchor assembly 10 comprises a locking element 6 and an actuating element 5 and an anchor element 8, which axially between the actuating element 5 and the locking element 6 preferably has a first non-rotationally symmetrical outer contour 14, a particularly rotationally symmetrical stop 17 and a second non-rotationally symmetrical outer contour 21. An anchor ring 13 is also shown, which can be manually rotated by means of a separate rotary key 25, for axially fixing the anchor assembly 10 to the container bottom 16 in the edge region of the through-hole 4. The rotation takes place relative to the anchor element 8, which is fixed in a non-rotationally symmetrical inner contour 15 of the through-hole 4 by means of the first non-rotationally symmetrical outer contour 14 so as to be non-rotatably fixed. The actuating aid 24 designed as a container foot can be used by the user to actuate the locking mechanism to release and / or in particular axially lock the tool assembly 11 from the anchor assembly 10. The non-rotationally symmetrical inner contour 32 of the actuating aid 24 ensures a simple and reliable non-rotatable connection to the actuating element 5 from the bottom.

[0051] The food preparation device is preferably a food preparation machine, for example an electric kitchen multi-purpose machine, which preferably has a heating element for heating food in the food preparation container. During operation, food and / or ingredients are added to the food preparation container 2 and prepared there by stirring, chopping and / or heating. The food can be solid or liquid. Plug contacts 29 are provided for supplying electrical energy to the electrical components of the food preparation container 2, for example the heating element.

[0052] In one embodiment, the rotary key 25 has an open cylindrical shape with an opening 26, which can be inserted axially through the actuating element 5 and / or the first outer contour 14, so that the anchor ring 13 can be unlocked by means of rotation even when the anchor assembly 10 is axially fixed. Preferably, the rotary key 25 has a radial, rod-shaped handle 28 for the user. Preferably, magnets for holding the anchor ring 13 and / or axial protrusions 27 are provided on the cylindrical shape, which can be engaged in a correspondingly shaped groove 30 on the outer contour of the anchor ring 13 by axial contact and cannot rotate relative to each other.

[0053] Figure 2A tool assembly 11 is shown having a tool 1 and a bell-shaped or cup-shaped tool connecting element 18. On the opposite side of the tool 1, the tool connecting element 18 has a preferably rotationally symmetrical edge 33, which in particular has a chamfer of approximately 45°. The edge 33 forms an entrance to the interior of the space enclosed by the tool connecting element 18. This axial entrance is limited and partially narrowed from the periphery toward the axis of rotation by the non-rotationally symmetrical inner contour 22. The projection of the non-rotationally symmetrical inner contour 22, which protrudes inwardly toward the axis of rotation 9, simultaneously forms a locking contour 19 for the locking element 6. The locking contour 19 thus narrows the entrance. The locking contour 19 extends in a ramp-shaped manner in the circumferential direction, i.e. the axial dimension increases in the circumferential direction. An undercut is adjacent to the non-rotationally symmetrical inner contour 22 and the locking contour 19. At the closed or upper end of the enclosed space, there is a non-rotationally symmetrical connecting contour 35 for connecting the tool 1 in a non-rotatable manner. The non-rotationally symmetrical connecting contour 35 can be at Figure 6 Component part of the connecting shaft 42 shown in , which is preferably non-detachably connected to the tool 1 .

[0054] Figure 3 and 4 The anchor assembly 10 is shown in a state of being anchored to the food preparation container 2. If the locking element 6 is Figure 3 34, 35 are oriented in a mutually matching manner, the tool assembly 11 can be plugged onto the anchor assembly 10 until the edge 33 is placed, in particular, flush or aligned, on the preferably rotationally symmetrical stop 17. The tool connecting element 18 surrounds the part of the anchor assembly 10 that is located above the stop 17, i.e., the second outer contour 21 and the locking element 6. When the edge 33 is placed flat on the stop 17, the non-rotationally symmetrical and mutually corresponding connecting contours 34, 35 of the tool 1 are simultaneously connected to the shaft 3 (the shaft is at Figure 5 and 6 17 ) are engaged (clamped) with each other in order to establish a positive connection that cannot be rotated relative to each other, in order to transmit the drive torque of the drive, in particular by means of a double-edge connection. When the edge 33 lies flat on the stop 17, the non-rotationally symmetrical inner contour 22 is also engaged (engaged) in the non-rotationally symmetrical outer contour 21 of the anchoring element 8 at the same time, in order to connect the tool connecting element 18 to the anchoring element 8 in a non-rotationally symmetrical manner. In the released position, the locking element 6 is oriented in such a way that the non-rotationally symmetrical inner contour 22 can pass through the locking element 6 and then further be inserted through the non-rotationally symmetrical second outer contour 21 likewise without hindrance until the stop 17. Preferably, the locking element 6 completely covers the second outer contour 21 or is largely aligned with it.

[0055] Figure 4The locking element 6 is shown in the locking position, in which the locking element 6 is rotated about the rotation axis 9 relative to the second non-rotationally symmetrical outer contour 21. In the locking position, the locking element 6 is no longer aligned with the second outer contour 21 and no longer completely covers the second outer contour 21. If an attempt is made to push the tool assembly 11 onto the anchor assembly 10 in the locking position, the edge 33 stops prematurely on the upper side of the second outer contour 21 and thus cannot reach the stop 17. This can prevent improper use.

[0056] If the tool connecting element 18 is inserted into the anchoring assembly 10 as planned up to the stop 17, it can be manually rotated in the Figure 1 The actuating element 5 and thus the locking element 6 are rotated into the locked position and relative to the rotationally fixed, non-rotationally symmetrical second outer contour 21 by means of the actuating aid 24 shown in the figure. The radial projection 36 of the non-rotationally symmetrical outer contour of the locking element 6 is thereby pushed in the circumferential direction onto the ramp-shaped locking contour 19 and is wedged or pre-tensioned there. The locking can be released again by rotating in the opposite direction into the release position.

[0057] Figure 5 A cross-sectional view of the anchoring assembly 10 is shown approximately at the height of the surface of the container bottom 16. Exactly three connecting elements 7 connect the actuating element 5 to the locking element 6 in a U-shaped manner to form an axial and rotational connection, said connecting elements being respectively guided axially through the anchoring element 8 via a connecting notch 37 provided for this purpose. In one embodiment, the connecting element 7 has a cross-sectional shape of a ring segment in order to be able to move particularly reliably in the circumferential direction in the connecting notch 37, which is also in the shape of a ring segment and extends over a larger angular range than the connecting element in order to be able to rotate the locking element back and forth between a released position and a locked position. Figure 4 In the embodiment, the anchor ring 13 is rotated into the slit-shaped indentation 12, preferably by Figure 1 The anchor element 8 is turned by means of a rotary key 25 shown in the drawing, which engages in the notch 30. The shaft 3 extends through a central hole in the anchor element 8.

[0058] Figure 6 A longitudinal section through a food preparation container with a locking connection is shown. At least one sealing element 38, for example a sealing ring, is arranged between the bottom side of the stop 17 and the upper side of the container bottom 16, between the connecting means 7 and at least one of the two radial inner walls of the connecting recess 37, and / or between the shaft 3 and the adjacent hole wall in the anchoring element 8, preferably at the upper end of the hole, in order to seal the food preparation container 2 downwardly so that liquid food cannot escape from the container bottom 16 through the penetration 4 and the anchoring assembly 10 anchored therein. Figure 63, the tool 1 is rotatably and axially fixedly connected to the tool connecting element 18 and the shaft 3 to the anchoring element 8. It is also shown that the tool 1 can be designed in two parts and has a connecting shaft 42 on the bottom side, which then has a non-rotationally symmetrical connecting contour 35 of the tool and is rotatably supported in the tool connecting element 18 via the ball bearing 39.

[0059] At least one clamping means 20, in particular a spring, is arranged and prestressed axially between the bottom side of the first outer contour 14 and the top side of the actuating element 5. In particular, at least two and / or a maximum of six, preferably three clamping means 20 are preferably each accommodated in an accommodating recess 41 in the actuating element 5, which preferably extends not only axially but also in a circumferential direction, in particular in the form of a ring segment, so that the clamping means 20 do not hinder the rotation of the actuating element 5 for the rotation of the locking element 6 relative to the anchoring element 8 between the locked position and the released position.

[0060] The preload force 23 of the clamping means 20 is transmitted to the locking element 6 via the connecting means 7 and can thus clamp the locking element 6 in the locking position relative to the locking contour 19. In addition, the clamping means 20 is axially offset when the locking element 6 is rotated from the release position to the locking position via the ramp-shaped locking contour 19. The offset corresponds to the lifting path 40 by pushing the projection 36 of the locking element 6 up to the ramp-shaped locking contour 19. The U-shape formed by the actuating element 5, the connecting means 7 and the locking element 6 ensures that the axial movement on the lifting path 40 is reliably transmitted against the preload force 23 of the clamping means 20.

[0061] If the user inserts the tool assembly 11 as planned onto the anchor assembly 10 with the locking element 6 in the released position up to the stop 17, the tool 1 is placed onto the shaft 3 and the non-rotationally symmetrical connecting contours 34, 35 engage with each other. However, there is no axial locking of the connection between the tool 1 and the shaft 3, so that if the shaft is driven in this state, the tool assembly 11 will be released from the anchor assembly 10. In order to avoid this, in one embodiment, the food preparation device is arranged such that the food preparation container 2 is received in a receptacle (not shown) of the food preparation device for operation and the shaft interface 31 can be connected to the drive, when the actuation aid 24 is connected to the food preparation container 2 in a rotational position, by which the locking element 6 is ensured to be in the locked position.

[0062] Therefore, a locked connection between the tool 1 and the shaft 3 can be achieved reliably and comfortably by axially locking the tool component 11 with the anchor component.

Claims

1. A food preparation device having a rotatable tool (1) for chopping and / or mixing food in a food preparation container (2), wherein: The tool (1) can be detachably connected to a shaft (3), the shaft extending from outside the food preparation container (2) through a through-portion (4) toward the tool (1) inside the food preparation container (2) so as to be able to drive the tool (1), wherein a locking mechanism is provided for lockingly connecting the tool (1) to the shaft (3), characterized in that the locking mechanism is arranged so that the connection between the tool (1) and the shaft (3) can be released and / or locked from outside the food preparation container (2), wherein the locking mechanism is designed to lock the tool (1) to the shaft (3) in a bayonet-like manner; The operating element (5) for operating the locking mechanism is arranged outside the food preparation container (2); the operating element (5) is connected to a locking element (6); the locking element (6) is used to lock the tool (1) to the shaft (3) and is arranged inside the food preparation container (2).

2. The food preparation device according to claim 1, characterized in that: The actuating element (5) is connected to the locking element (6) via a connecting means (7) which extends within the passage (4) and / or axially.

3. The food preparation device according to claim 2, characterized in that: In a longitudinal section along the rotation axis (9), the operating element (5) and the connecting element (7) form an L-shape, the connecting element (7) and the locking element (6) form an L-shape, and / or the operating element (5), the connecting element (7) and the locking element (6) together form a U-shape in the order described.

4. The food preparation device according to any one of claims 1 to 3, characterized in that: The actuating element (5) and the locking element (6) are movable relative to an anchoring element (8), which has anchoring devices (12, 14) for anchoring to the food preparation container (2) in a rotationally fixed and / or axially fixed manner.

5. The food preparation device according to claim 4, characterized in that: The anchoring device (12, 14) comprises a slit-shaped recess (12) for accommodating an anchoring ring (13) in an axially positively locking manner and / or a first non-rotationally symmetrical outer contour (14) for being connected to a non-rotationally symmetrical inner contour (15) of a penetration (4) in a positively locking manner and non-rotatably relative thereto.

6. The food preparation device according to claim 5, characterized in that: When the anchoring ring (13) is placed or rotated into at least one slit-shaped recess (12), the wall is tensioned or clamped between the stop (17) and the anchoring ring (13).

7. The food preparation device according to claim 6, characterized in that: The container bottom (16) is tensioned or clamped around the penetration (4) between the stop (17) and the anchoring ring (13).

8. The food preparation device according to any one of claims 1 to 3, characterized in that: The locking mechanism is arranged so that the locking element (6) can be moved into a locking position for lockingly connecting the tool (1) to the shaft (3) or into a releasing position for releasing the locking connection between the tool (1) and the shaft (3) by operating the operating element (5).

9. The food preparation device according to any one of claims 1 to 3, characterized in that: A tool connecting element (18) connected to the tool (1) is provided for lockingly connecting the tool (1) to the shaft (3), and the locking mechanism is provided so that the locking element (6) can be locked with the tool connecting element (18).

10. The food preparation device according to claim 9, characterized in that: The locking mechanism is arranged so that the locking element (6) can be connected to the tool connecting element (18) in an axially positively fixed manner.

11. The food preparation device according to claim 9, characterized in that: The tool connecting element (18) has a locking contour (19) for locking with a locking element (6) in a locking position.

12. The food preparation device according to claim 11, characterized in that The locking contour (19) is ramp-shaped.

13. The food preparation device according to any one of claims 1 to 3, characterized in that: A clamping device (20) is provided, and the locking mechanism is arranged so that the clamping device (20) axially preloads the locking element (6).

14. The food preparation device according to claim 13, characterized in that The clamping device (20) is a spring.

15. The food preparation device according to claim 4, characterized in that The anchoring element (8) has a second non-rotationally symmetrical outer contour (21) for fixing the tool connecting element (18) in a form-fitting and non-rotatable manner, and the tool connecting element (18) includes a non-rotationally symmetrical inner contour (22) which is designed so that the tool connecting element (18) can be plugged onto the second non-rotationally symmetrical outer contour (21).

16. The food preparation device according to claim 11, characterized in that: The locking mechanism is configured such that, in order to connect the locking tool (1) to the shaft (3), the operating element (5) is rotated so that the locking element (6) is rotated from a released position to a locked position and is thereby axially displaced by a ramp-shaped locking contour (19) while simultaneously overcoming a preload force (23) of a clamping device (20).

17. The food preparation device according to any one of claims 1 to 3, characterized in that: An actuation aid (24) is provided for actuating the actuation element (5), the locking mechanism being arranged so that the actuation aid (24) can be rotated relative to the food preparation container (2) into an operating position for locking the connection of the tool (1) to the shaft (3) and / or can be rotated out of the operating position for releasing the locked connection.

18. The food preparation device according to claim 17, characterized in that The handling aid (24) is a foot of the food preparation container (2).

19. An anchoring assembly (10) for a food preparation device according to any one of claims 1 to 18, the anchoring assembly being used for anchoring a food preparation container (2) of the food preparation device, so that the shaft (3) of the anchoring assembly (10) can extend from the outside of the food preparation container (2) through a through-portion (4), the through-portion leading into the interior of the food preparation container (2), so as to be able to drive a tool (1) inside the food preparation container (2) for stirring and / or chopping food, wherein: The anchoring assembly (10) comprises an anchoring element (8) and an anchoring device for anchoring the anchoring element (8) to a food preparation container (2), wherein the anchoring device is arranged between an operating element (5) and a locking element (6) along the direction of a rotation axis (9) of the shaft (3), wherein the operating element (5) and the locking element (6) are connected to each other so that the operating element and the locking element can move together relative to the anchoring element (8), and the anchoring device is designed to lock the tool (1) to the shaft (3) in a bayonet-like manner; the operating element (5) is arranged outside the food preparation container (2), and the locking element (6) is used to lock the tool (1) to the shaft (3) and is arranged inside the food preparation container (2).

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