Household appliance, especially a centrifugal juice extractor.

p0001The invention relates to a household appliance, particularly juice centrifuge, with an electrically driven rotating tool comprising a placeable on the housing base and with this lockable and the tool enclosable lid before the start of operation, said lid lock comprises a lock bolt in the form of a double-armed lever, around a arranged in the household appliance bearing assembly is pivotable and connected to both movable from the lid locking elements as well as the cover occluding locking elements cooperating and via a with a turn the unit on and ausschaltenden appliance switch is coupled such that switching of the device being driven by the appliance switch only in the closed position of the cover to the housing base defining the locking bolt is possible that with the cover removed of the locking bolt is not movable out of its off position, wherein the free ends of the locking bolt after the displacement of which is transferred into the pivoting plane of the locking elements by pressing down the lid to the housing base with the then in the locking portion reaching locking elements cooperate in the locking sense.

p0002Such a household appliance is already known from DE-OS 31 49 072, in particular from the figures 1 to 4 are known. This juicer is the less to be considered advantageous that requires two hands to close the lid, namely by with one hand the lid shut prints, whereby the latch members only release a rotation of the locking bolt, and with the other hand the switch and thus the locking bar is rotated such that it can move into the formed on the latch elements recesses with its free ends. Only then the switch can be turned further by further rotation into its switching position II, whereby the drive motor of the device is activated. However, this is only possible by a trained on the switch actuator pin in a recess formed on the locking bolt engages in such a way that only when the switching position I is reached, the setting allows further rotation of the switch. These scenes adjusting pin arrangement has the disadvantage that it must be designed to be particularly stable if it is not to fail prematurely. It would therefore in this area metallic materials are used, which in the locking device otherwise made of plastic this expensive and thus can be considerably expensive. A further disadvantage is that the lid relatively long locking elements must be formed, causing a complicated and expensive manufacture.

p0003The object of the invention is therefore to provide a locking device for a domestic appliance, which is less expensive, easier to manufacture, easy to use and robust.

p0004This object is achieved in that the locking element is separated from the cover and is slidably supported in the direction of displacement of the cover in the housing base, that the locking element is formed by a transversely to the direction of the lid sliding, but blocked in the direction of the lid component whose displacement of locking bolt in the open position of the device permits and prevents in the closed position and that the locking element with the cap is positively connected in the closed position. This inventive arrangement thus a one-handed operation is made possible by first using only one hand, the cover is applicable depressed until a locking of the lid on the locking element takes place and at the same time the blocking element has thus far been depressed by the cover that it unlocks the locking bolt Has. Then can be rotated with the same hand of the devices switch and thus also the locking bolt, so that thereby it passes from the electric switch in its switch-on position and the device is put into operation. Since this locking arrangement does not particularly high-strength components required, these can be made of plastic especially inexpensive and simple.

p0005In a development of the invention it is provided that the locking bolt are formed by a ring and formed at the opposite sides of protrusions, wherein the free ends are brought into engagement with the latch elements upon rotation of the locking bolt. The circular design of the locking bolt it is particularly resistant to bending and therefore of him a long service life can be expected. The annular configuration of the locking bolt allows the present invention further comprises outside the housing base arranged from the center bearing of the locking bar, so that the drive shaft of the drive motor in the center can penetrate the housing lower part towards the lid, which leads to a particularly simple arrangement of the components of the household appliance.

p0006Since the blocking and locking elements, as seen in the radial direction of the household appliance, lie nearly on a common line, the projections must grip around the locking elements in order to interact with the locking element. For this reason, it is particularly advantageous when the projections of the locking elements surrounding long holes are formed so that these can also be designed for durability.

p0007It is advantageous that the locking element has a recess into which only after its displacement into the closed position a locking bolt formed on the locking lug can be screwed. The recess in cross section is semicircular and extends only so far in the direction of downward, that with the cover removed, the formed on the locking bolt latch on the rotation of the locking bolt can not enter into this recess, but abuts the otherwise circular cylindrical shank diameter of the blocking element.

p0008To enable release of the lid from the locking element after operation of the household appliance, an actuating button is formed on the locking element that is accessible from the outside. it, when the operation knob penetrates through the wall of the housing lower part via a bore to the outside, since it is especially easy to access thus being particularly advantageous.

p0009A particularly uniform closure of the cover without causing undesirable stresses in the lid is achieved in that on both sides of the lower housing part diametrically opposite to a respective operating knob is formed. By this arrangement is also achieved that the force required to unlock the lid release force is halved.

p0010It is particularly easy to manufacture the locking member when it is formed by a one-armed lever, whose free, swing-end manufactures locking the lid. To enable an easy assembly of the locking element in the device lower part and at the same time to enable a simple, fixed in the displacement direction of the cover mount, it is proposed that at the free end a radially outwardly directed Erhe formed environment, which in one at the housing base and the lid engages correspondingly formed recess. This inventive arrangement, the locking element is secured in the direction of the lid, but easily rotatable in the pivoting direction, the fulcrum of the locking element or the lever is formed by its free end opposite end.

p0011In order to allow a displacement of the blocking element for the purpose of unlocking and locking is provided in an advantageous manner in that the locking element, the lower housing part penetrates to the back cover and is slidable by a operable by the cover member in the displacement direction against the force of a spring element. Again, the two locking elements radially as far away from each other, that an actuation with only one hand without the cover placed is not possible. In penetration of the blocking element by the housing lower part, both parts have to be sealed against each other, so that liquids can not enter the housing interior.

p0012A particularly simple operation of the blocking elements is achieved when between the lid and the locking elements a juice container is formed of this shift transmits upon displacement of the lid on the locking elements.

p0013Thus, the one-armed lever is always pressed radially outward, in order to achieve a locking selbstätiges upon depression of the cover, is provided that on the one-armed lever engages a spring that always presses the radially-armed lever with bias outward.

p0014An embodiment of the invention is illustrated in the drawing and will be described in more detail below. Show it:<ul><li>Fig. 1 a partial longitudinal section through a formed according to the invention juice centrifuge,</li><li>Fig. 2 view according to the cut II-II of Fig. 1, wherein the locking means occupies its open position and</li><li>FIG. 3 view of the cut II-II of FIG. 1, but compared to FIG. 2, the locking device is occupied their closed position.</li></ul>

p0015The juice extractor 1 comprises a simplified mounting of two parts 26, 27 existing housing bottom part 3, in which the centrally arranged drive motor 11 (in this case, only the rotor 34 with drive shaft 28 and a part of the stator, namely, the spherical bearings 29, shown) is attached , Above the spherical bearing 29, a spline 30 is attached to the drive shaft 28 is formed, on the one communicating with the strainer 2 in a rotationally fixed engagement clutch member 31 is shrunk (the rotationally fixed connection between the coupling element 31 and the screen basket 2 is not shown in the drawing).

p0016The filter element 2 comprises a disk-shaped bottom part 32 having formed on its top surface friction elements 35, which is adjoined on its outer circumference tapered upwardly and outwardly expanding the screening member 33 (through-holes are not shown here) is connected. At the top in the drawing end of the strainer 33, a the screen basket 2 connects upwards limiting restriction ring 36th The ring 36 and the base part 33 made of plastic and are integrally formed on the edge of the strainer 33rd

p0017Radially outwardly of the tool performing the screen basket 2 there is arranged an upwardly open, pot-shaped juice tank 25, which surrounds the screen basket 2 circular and 31 directed in the region of the coupling element an upwardly annular neck 36 surrounds with a circular cross-section bore 37th The neck 36 serves to ensure that on the one hand a connection from the screen basket 2 can be made to the coupling element 31 and on the other reaching the juicing in the juice container 25 liquid from entering the motor housing 38th For this reason, the juice should not be higher than the length of the neck 36 in the container 25th

p0018The filter element 2 and the container 25 are shown in FIG. 1 is closed from above by a cover 4, in order to avoid manual intervention in the screen basket 2 during operation. The lid 4 has at its upper portion to a feed tube, not shown in the drawing, through which the juicing provided fruits are entered. The cross section of the feed tube is dimensioned so small that a user can not penetrate with his hand the filling hole. The filling is when the cover 4 vertically above the friction elements 35th

p0019According to Fig. 1, a lower part the device is below the container 25 3 formed upwardly closing partition 39, the motor housing 38 limits the upward.

p0020On both sides of the locking device is formed in the motor housing 38th Referring to FIGS. 1 to 3 is the locking device from the annular locking bolt 5, the four evenly distributed on the circumference, concentric to the center line ver ongoing, oval recesses 41 having. The recesses 41 are penetrated in FIG. 1 of the partition wall 39 downwardly protruding pins 42, which at its free end radial extensions 43 which bear against the underside of the locking bolt 5 and thereby hold the locking bolt 5 towards the partition wall 39 at a constant distance , The extensions 43 are sized such that they form during the pushing of the locking bolt 5 with this a snap connection. For simplicity, this bearing assembly 6 is not shown in the Figures 2 and 3 in the lower recess 41st

p0021The locking bolt 5 comprises according to FIGS. 1 to 3 in a central bore 44 which is dimensioned such that the spherical bearing 29 and parts of the equipment drive 11 can penetrate this.

p0022According to the figures 1 to 3 between two opposite recesses 41 is radially formed an elongated hole 13 outside the locking element 5, which is penetrated by the locking element. 7 On the radially outer wall 45 of the elongated hole 13 has a stop surface 46 is formed at the free end 9, which is aligned with a lying opposite the stop surface 47 of the locking element 8 and located at the same height, when, as shown in Fig. 3, the operation knob 16 from the lower housing part 3 protrudes outward. In this position, even if the locking elements 7 according to FIG. 1 are shifted downward, the locking bolt can be rotated. 5 For example, as Fig. 2 shows the operating knob 16 in the direction Y, ie, the cover 4 is not properly with its recess 21 in the on locking element 8 formed elevation 20 (Fig. 1) snapped, then the locking bolt 5 not according to the rotational direction e are brought into the locking position, since the two abutment surfaces 46, 47 no longer are aligned with but are offset from one another such that the free end 9 abuts the web 48 (Fig. 2). The operating knob 16 extends over the stage 49 in the motor housing 38 radially outwards, so that it forms a stop to the lower housing part 3 and therefore can not fall out.

p0023The wall of the elongated hole 13 is connected via an angular transmission 50 (Fig. 2 and 3), which is in turn connected to the chassis-mounted device of the lower part 3, and externally accessible rotary switch 51. On the same level as the locking bolt 5 2 and 3 in Fig. Attached a device switches 10 on housing base 3 which switches over a protruding from the housing actuator pin 52 and can be switched off, whereby the power supply via the cord 53 from the power source to the device drive 11 controllable.

p0024According to Fig. 1, a projecting into the recess 14 latching lug 15 is in the closed position of the locking element 2 at the level of the recess 14 is formed (s. Also FIG. 3). The open position shown in FIG. 2, the juice extractor 1 clearly shows that the latch 15 is located in front of the recess 14, so only upon rotation of the locking bolt in the rotational direction E engages in the recess 14, as clearly Figs. 1 and 3 show. The slot 13 also has the task of leading the formed as a sleeve locking element 7 at its free end over the locking bolt 5 on the partition. 39

p0025In Fig. 1 is a concentrically with the locking element extending, integrally formed in diameter smaller pin 54 at the upper end of the locking member 7, of an opening formed in the partition wall 39 hole 55 penetrates and is present at the bottom of the container 25 and from this in the direction of displacement 12 down pressed against the force F of the coil spring formed as spring element 24 is (closed position). The spring element 24 abuts on a part 26 integrally formed into the motor housing 38 protruding upward studs 56 and against a stop 57 in the blocking element. 7 The locking element 7 is telescopically slid over the stud bolts 56 in such a way that always by the spring element 24 an upwardly directed force F is exerted on the blocking element 7 and thus, when the locking member is not pressed from the reservoir 25 according to Fig. 1 to the bottom 7, always with its step 58 abuts against the underside of the partition. 39 Only the two-part construction of the housing lower part 3 thus enables the assembly of the locking member 7 on the stud bolt 56, so that the locking member 7 after mounting tied between the stud bolt 56 and the bore 55 and is centered.

p0026The locking element 8 consists in FIG. 1, consisting of a substantially straight lever, which engages in its lower region by means of an elbow 59 in an opening formed at the part 3 opening 60, which simultaneously constitutes the pivot bearing of the locking element 8. The locking element 8 is essentially in the operating position against the wall of the part 27 of the lower housing part 3 at. At the free end 19 of the locking element 8, a horizontally extending elevation 20 moves radially outwardly, which engages in a on member 27 correspondingly formed recess 21 'and this permeates even to the outside, so that when the cover 4, this elevation 20 in formed on the cover 4 engages the recess 21, as shown in FIG. 1. Same time, the elevation 20 a leaf spring 23 which is attached by means of a projection 61 on the latch member eighth The leaf spring 23 is mounted in a blind hole 62 by means of a U-shaped arc. Upon rotation of the locking element 8 about the bearing 59, 60 in direction U, the leaf spring 23 is biased such that this 8 springs back on release of the latch member into its locking position shown in FIG. 1.

p0027To avoid repetition, 1 to 3 same for the same components corresponding to reference numerals in FIGS. Used. Since the locking device, as shown in FIGS. 2 and 3, around the axis 63 is formed symmetrically, it is understood that this arrangement is to the left of the axis 63 is formed according to the same, but what is not in the drawings is shown.

p0028The operation of the locking device according to the invention of the juice extractor is the following:

p0029If the container 25 is pressed by the cover 4 is not down, the stage 58 strikes the blocking element 7 to the underside of the partition wall 39 by the force of the spring 24 (Fig. 1). In this way it is not possible to introduce the locking nose 15 in the recess 14 of the locking member 7, as in non-depressed locking member 7, the lower in Fig. 1 the end of the recess 14 passes (not shown) in the effective range of the detent 15.

p0030Now, when the lid 4 of FIG. 1 is pressed from top to bottom, so this displaces the juice tank 25, which in turn moves via the pin 54, the locking member 7 to the bottom. It now passes the detent 15 in the full scope of the recess 14. Simultaneously, the elevation 20 from the lid 4 is moved radially inwardly until the recess 21 has reached the height of the elevation 20 and those in the recess 21 by the force of the spring 23 can resiliently engage. Now the lid is positively connected to the juice extractor 1, and the screen basket 2 is no longer accessible by hand. The unit has its stand-by position he can see. Now, when the rotary switch 51 is rotated so that the locking bar 5 he twisted via the angular gear 50 in the rotational direction E, so engages the locking lug 15 in the recess 14 a. Simultaneously, the stop surface 46 sets against the stop surface 47 of the locking element 8, so that a pivoting of the locking element 8 is excluded in the direction U by the safety catch. 5 At the same time strikes the wall of the long hole 13 of the actuating pin 52 and moves it according to FIG. 3 as long as in the case of the appliance switch 10 in until it connects from the mains via the cable 53 to drive 11 devices.

p0031The juice extractor 1 has reached its operating position, and the device driver 11 drives high peripheral speed of the screen basket 2 at. In this position, the cover 4 is no longer from the machine 1 is detachable. Now fruits can be entered through the feed tube, not shown, the one crushed to the friction elements 35 and thrown against the radially outer wall of the screening member 33, where the juice passes through the Siebkorböffnungen not shown, while the pulp in the screen basket 2 remains and upwardly Tresterauslaß shifts outwards.

p0032If after completion of juicing the motor stopped by turning off the switch devices 10, it must be turned back on the dial 51 of the locking bolt 5 against the rotational direction E. Thus, after the device drive 11 is already turned off, the free end 9, the stop surface 47 and the latch 15, the recess 14 free, so that the locking element 8 can be swiveled in actuating direction U, and the lid 4 slides from the survey 20 and this the cover 4 release for extracting the juice extractor. 1