EP0822776B1 - Vacuum cleaner with a motor casing - Google Patents

Abstract

PCT No. PCT/EP97/01054 Sec. 371 Date Oct. 31, 1997 Sec. 102(e) Date Oct. 31, 1997 PCT Filed Mar. 3, 1997 PCT Pub. No. WO97/32511 PCT Pub. Date Sep. 12, 1997A vacuum cleaner having a motor casing (G), optionally having a connected filter chamber, and an appliance stem (St), it being possible to plug the appliance stem (St) into a plug receptacle (21) close to the motor casing (G), and a power switch (24), which is arranged in the motor casing (G), being actuated on plugging in the appliance stem (St). In order to improve such a vacuum cleaner with regard to the switching-over of the motor-casing-side power switch effected by the appliance stem, the power switch (24), which is formed as a sliding switch, has a remote-actuation extension (48), which is acted on by plugging in the appliance stem (St) with simultaneous actuation of the power switch (24).

Description

The invention relates to a vacuum cleaner with a Motor housing, possibly with a connected one Filter chamber, and a handle, the handle in a plug-in receptacle of the motor housing can be inserted and when inserting the device handle a circuit breaker mounted in the motor housing is operated.

Such vacuum cleaners are known. So is in the WO 95/28867 a vacuum cleaner specified, which one in the motor housing can be anchored to the handle. The latter operates when plugged into the motor housing or one when pulled out of the same changeover switch arranged in the motor housing. The latter causes a condition-related electronically Activate or deactivate a motor housing side Circuit breaker. When inserting the device handle the circuit breaker is in the motor housing electronically controlled in full load position, so that another circuit breaker connected in series in the handle or in a handle the handle of the device is activated. The control of the Electric motor of the vacuum cleaner only takes place after this still on the device-side circuit breaker. When pulling the handle out of the motor housing the switch is operated such that a Switching of the circuit breaker on the motor housing side in a zero position. The latter is therefore the active circuit breakers. Vacuum cleaner with a peeled off Tool handles are preferred for over-floor work used, here the power control of the naturally aspirated engine via the motor-side circuit breaker he follows.

In view of the state of the art described above becomes a technical problem of the invention therein seen a vacuum cleaner of the type in question with regard to the switching caused by the handle of the circuit breaker on the motor housing side to improve.

This problem is solved first and essentially in the subject matter of claim 1, with the focus being that the circuit breaker designed as a slide switch has a remote actuation extension which is acted upon by inserting the handle of the device while simultaneously actuating the circuit breaker. A switchover takes place here mechanically. No electronic parts and circuits susceptible to faults are required. The circuit breaker in the motor housing, which is designed as a slide switch, has a remote actuation extension which can be interacted with the handle, by means of which the slide switch is preferably moved into a full load position by inserting the handle into the motor housing. Here, too, as already indicated in the prior art, the circuit breaker on the motor housing side is connected in series with a second switch on the handle side. This is preferably located in the area of a handle handle. Due to the series connection and the full load position of the circuit breaker on the housing side, the circuit breaker on the handling side is activated when the handle is inserted. With the help of the latter, the power of the naturally aspirated engine can now be controlled. The remote actuation extension can be connected to the actuation area of the circuit breaker using the same material. Furthermore, the design can be such that when the implement handle is removed from the motor housing, the circuit breaker on the motor housing side automatically moves back to the zero position, for example by means of a tension spring or the like. This ensures that the naturally aspirated engine is switched off when the handle is removed. Its power control is then only regulated via the motor-side circuit breaker.
In an advantageous development of the subject matter of the invention, it is provided that the remote control extension has a detent formation on its end on the handle side for interaction with a latching recess on the handle. When the handle of the device is inserted into the motor housing, the latching recess of the handle of the device catches the latching shape of the remote control extension and shifts the circuit breaker into a full load position via this extension. Pulling out the device handle causes the circuit breaker to be moved back to the zero position due to the positive connection between the latching shape of the remote control extension and the latching recess of the device handle. Here, for example, the remote control extension can be designed to be elastic at least in the area of the latching configuration, so that when the circuit breaker reaches the zero position, the latching configuration resiliently leaves the latching recess of the device handle when the handle is pulled out further. For this purpose, it is further proposed that one end of the remote control extension on the handle side is dragged to a position when the handle is pulled out, which position is shifted back relative to a mouth of the plug receptacle. The remote actuation extension or its latching shape accordingly does not protrude beyond the mouth of the plug-in receptacle after the device handle has been pulled out, so that the remote-actuation extension always remains in a protected position within the plug-in receptacle. It proves to be particularly advantageous that the end of the remote control extension on the handle side is displaceable in a gap between an inner wall of a receptacle and a plug arranged in the receptacle. As a result, the remote actuation extension is guided and a secure positional positioning within the plug-in receptacle, which also ensures that the latching shape is always reliably found by the latching recess of the handle. The plug arranged in the plug receptacle forms the electrical coupling to a coupling part which can be assigned to the plug in the handle. It is also proposed that the displacement is limited by a stop on the back of a connector. For example. For this purpose, the remote control extension can have an integrally formed stop lug, which occurs when the device handle is pulled out against the rear of the connector on the receptacle, in order to define the zero position of the circuit breaker. In an advantageous development of the subject matter of the invention, it is proposed that the outermost position of the end of the remote control extension on the handle side is in overlap with the connector such that contact tabs arranged on the connector protrude beyond the free end of the remote control extension. This ensures that only one handle, the latching recess of which extends beyond its plug coupling at the level, can cause the circuit breaker to be displaced. Furthermore, this training is particularly advantageous if an adapted mains coupling is inserted into the plug receptacle when the device handle is removed to supply power to the naturally aspirated motor. This network coupling can be designed, for example, in the form of a known IEC connector. The latter is inserted into the plug receptacle in such a way that the contact tabs of the plug on the motor housing side are captured to form the electrical coupling. The actuation extension is not acted upon here. This is also desirable since, in such a configuration, the circuit breaker on the motor housing side should initially remain in a zero position. This position should only be exited by the operator on the switch side.

According to an advantageous embodiment of the invention, the plug has contact tabs. To improve the coupling between the handle and motor housing, it is proposed that the plug be set back in the plug receptacle in such a way that the front ends of the contact lugs are at a distance from the mouth of the plug receptacle. The contact tabs of the plug on the motor housing side are thus arranged in such a hidden position within the plug receptacle that they cannot be accidentally bent, for example when the vacuum cleaner is put down. This also ensures a secure coupling within the plug receptacle. The inner wall of the plug-in receptacle offers a lateral guidance of the device handle socket. It is also proposed that the plug be cantilevered in the plug receptacle. For example. For this purpose, the plug can have a cross section which is reduced compared to the cross section of the plug receptacle. A remote actuation extension of a circuit breaker on the device housing side, as already described, can be positioned in the annular space thus formed between the plug and the plug receptacle inner wall.
The handle to be inserted into the plug receptacle can have a projection protruding into the annular space formed for actuating this remote control extension. The latter can, for example, be integrally formed on an outlet on the side of the device handle. The arrangement of the plug in the motor housing is preferably such that the plug is fastened in the plug receptacle via a plug base. The connector attached to the connector housing thus projects freely into the connector receptacle. The depth of the annular space formed between the plug and the plug-in receptacle inner wall is limited by the plug base, which is adapted in cross-section to the inner cross-section of the plug-in receptacle. This also provides a limit stop for a handle extension for actuating the remote control extension of the circuit breaker. In order to ensure transmission of high mechanical loads between the handle and motor housing, it is proposed according to the invention that the handle can be inserted into the plug receptacle by at least 1.5 times, preferably 2 times the largest free dimension of a handle cross section , It is further proposed that the dimension from the mouth of the plug receptacle to the base of the contact tabs corresponds approximately to the largest dimension of the cross-section of the handle. It follows from this that the handle of the device preferably enters the annular space formed between the cantilevered plug and the inner wall of the receptacle by the size of the mouth of the plug receptacle to the base of the contact lugs. The cantilevered length of the connector on the housing is selected accordingly. Furthermore, this configuration results in two areas with different tasks in the area of the plug-in receptacle. The first area assigned to the plug-in receptacle forms the electrical coupling area between the socket on the device side or the power socket that can be used instead of the device handle and the connector on the housing side. The second downstream area is designed as a coupling area between the handle and a remote actuation extension of a circuit breaker on the device housing side, the length of this second area, ie the length of the cantilevered area of the plug, preferably corresponding approximately to the maximum displacement path of the circuit breaker. Both areas together form the mechanical coupling area between the handle and motor housing, the entire length of which is dimensioned so that high forces and moments can be transmitted. In an advantageous development of the subject matter of the invention, it is provided that the handle and / or a power socket has a locking pin which projects perpendicularly to the insertion direction and which engages in a locking receptacle of the plug receptacle. This latching is used to securely hold the handle of the device or the mains socket within the plug receptacle, which latching can only be released to relieve the connection. The locking pin provided on the handle or on the mains socket can be spring-loaded, for example, perpendicular to the insertion direction in a locking direction. For example. For this purpose, the locking pin can be provided on the underside with a compression spring. However, designs are conceivable in which the locking pin is designed as a section which is partially cut out of the housing jacket and resilient in itself. The snap-in recess on the receptacle side for receiving the snap-in pin is provided in a preferred embodiment in the already mentioned first area of the plug-in receptacle, ie in the area of the electrical coupling. To cancel the locking connection between the handle or mains socket and plug receptacle, it is proposed that the locking receptacle is provided with an ejector for disengaging the locking pin. By actuating the ejector, the locking pin is displaced, preferably against a spring force, in such a way that the handle or the mains socket can then be removed. Here it proves to be advantageous that the ejector consists of a flexible plastic part with an integrated, for example, metallic pressing part. In a further embodiment, the latter can also be a hard plastic part.

After a further advantageous training of Invention a power socket is provided the power socket can be inserted into the handle is. Here is suggested to improve the vacuum cleaner that the handle of the device has a connector on one side for interaction with the mains socket, the plug in a socket holder of the handle by the dimension of the largest free cross section of the Power socket is shifted back that the device handle is designed as a socket for interaction with one compared to the handle side Plug moved back by the same amount the plug receptacle, the plug of the plug receptacle however at least partially from a hollow profile of the Device handle can be run over and the socket of the Device handle over the overrun dimension in the hollow profile is shifted back. Here comes preference a mains socket with at least two flat plug receptacles used, the power socket in Cross-section perpendicular to the direction of insertion out of round, with an axis of symmetry running through the largest dimension is trained. The training is concrete chosen that a division axis transverse to the axis of symmetry runs in such a way that the cross section above and below the division axis from a convex line of curvature is limited, with both lines of curvature essentially are circular, with different Radii. This results in a kind of elliptical Cross section, preferably the transition areas of the two cross-sectional sections is also rounded are trained. An embodiment is preferred at which the radius of the above the division axis arranged cross-sectional section is larger than the radius of the one below the division axis Line of curvature. For example. can be the radius of the top convex line of curvature 45 to 55 mm, preferred 50 mm and the lower line of curvature a radius of 35 up to 40 mm, preferably 37 mm. It is essential that the center of the larger radius line of curvature outside the total cross-section of the mains socket is arranged and the center of the smaller radius Line of curvature lies within the total cross-section, where both centers on the axis of symmetry of the Are positioned. There is also further the possibility of the two above and below the Gradient lines of curvature each several circular sections of different radii reassemble. This results in a handling technology favorable design of the mains socket. In particular, this design proves to be easy to handle. This is also a visual aid for the user, the socket in the correct position to be assigned plugs through the asymmetrical, given non-circular design of the cross section. In an advantageous development of the subject matter of the invention it is intended that one by the two Transitional areas of the different circular lines given cross-sectional dimension is significantly larger than a perpendicular maximum dimension of the cross section. This results in a relatively flat design the power socket. Together with the circular section trained cross-sectional sections above and below the division axis there is an ergonomic favorable design. Are preferred here Ratios of 15:10 to 20:10, preferred 17: 10. In a preferred embodiment is one largest cross-sectional dimension of approx. 34 mm and one for this vertical dimension of approx. 20 mm intended. It is also suggested the insertion length the mains socket into the device-side or stick-side Plug receptacle of the largest cross-sectional dimension adapt to the mains socket. This means preferably an aspect ratio of the largest cross-sectional dimension to insertion length of approx. 1: 1. In Proposed that the tab receptacles in Reference to a connecting line between the transition areas asymmetrical, namely to the cross-sectional section with the more curved outline, are offset. As already indicated, the mains socket is -related to the connecting line between the transition areas - asymmetrical, but - related symmetrical to the axis perpendicular to this line built up. The result of this is that at a symmetrical arrangement of the tab receptacles to the perpendicular to the connecting line between the Transitional areas and an axis centered on the total cross-section of the mains socket aligned arrangement of the tab receptacles - arranged asymmetrically with respect to the connecting line are. In the preferred embodiment of the mains socket, at which above and below this Connection line the cross-section limited curvature lines different radii are provided Flat plug receptacles in the direction of the more curved Outline, d. H. more in the area of the smaller Radius cross-sectional section offset. It is preferred that the flat plug receptacles parallel to the connecting line between the transition areas to move such that a connecting line between the centers of the tab receptacles at least approximately by the centroid of the entire cross section of the socket, which the latter - due to the composition of the Cross-section of granularity lines different Radii - not with the intersection of the connecting line between the two transition areas and this perpendicular axis coincides. The tab receptacles are otherwise those of the state of the Technology based on known recordings. You point in each case an entry area with a rectangular cross section on. In the longitudinal direction of the mains socket extending receiving opening is an electrical Connection, metallic clamping sleeve provided. According to the invention it is further proposed that the Power socket a protruding beyond its outer surface Has locking pin, which is perpendicular to the extension the flat connector receptacles are spring-loaded. conditioned this configuration is an extract protection given the connector. With an insertion the mains socket into a device-side and / or stem-side, appropriately trained plug-in receptacle the locking pin enters a locking recess. This Latching can only be unlocked, which is why Area of the plug-in receptacle a corresponding probe provided in the form of an ejector or the like can be. This is particularly the case with vacuum cleaners from Advantage, as this is due to tensile loads the mains socket to unintentionally disconnect the plug connection can come. It is also proposed that the locking pin on the less curved outside is arranged. It proves to be particularly advantageous here that the locking pin is approximately in the middle of the Flat plug receptacles is aligned. At a preferred embodiment, in which the weaker curved outline of the socket cross section forms the upper area of the mains socket the advantage that when gripping the power socket the locking pin sits ergonomically, so that this in the simplest way by means of the thumb for insertion the mains socket into a device-side and / or stick-side Plug receptacle can be depressed. It there is also the possibility of the device side and / or shaft-side plug-in with one of the locking pins to assign assigned run-up slope, which when the mains socket is inserted of the locking pin. An embodiment is preferred in which cross-section between the two Flat plug receptacles a non-conductive round plug receptacle is trained. The round plug receptacle thus formed is therefore a blind receptacle without a contact sleeve educated. The socket in the motor housing is the socket holder of the device handle in the essentially modeled. Only the cross section of the plug arranged in the plug receptacle reduced in cross-section, so that between the plug and the plug-in inner wall remains an annulus. For this purpose, the connector on the housing is on one Plug base arranged and cantilevered freely into the interior the receptacle. In the so educated Annulus occurs when the device handle is inserted a hollow profile of the same, which hollow profile in Extension of the socket on the device side arranged is. This socket on the handle side is adapted to the cross section the connector on the housing. The Training is still chosen so that the power outlet both in the can holder of the device handle as can also be used in the plug-in receptacle of the motor housing is, d. H. Can holder of the device handle and plug holder the cross section of the motor housing are the same educated. The length of the mains socket is chosen so that when you plug this into the receptacle of the engine case this is not in between Plug and socket inner wall formed annulus entry. The can holder of the handle and the The socket of the motor housing has a and device handle end section cross section adapted internal cross-section. Conditional on this Configuration, the plug-in receptacles are given a guide function for the mains socket or for the handle section. With a slightly twisted approach the mains socket on the socket the convex lines of curvature a reeving of the mains socket into the socket. The power socket will automatically moves to the desired insertion position. It also follows from the geometries that despite only slight asymmetry a significant blocking incorrect handling is given. For example, the power socket in a position rotated by 180 ° Plug-in receptacle is not inserted possible. This is where the referring function comes the plug receptacle is not effective. The user cannot bring the clutch into force, so that malfunctions are counteracted.

Due to the previously described configurations is the vacuum cleaner according to the invention in the simplest Way for both soil and above-ground cultivation usable, using only one connecting cable place. The latter is only from an upper end of the handle into a plug socket in the motor housing reconnected. The plug receptacle fulfills the Tasks of good transmission of high mechanical Loads between the handle and the motor housing, a coding of the mains cable or mains socket and Device handle, an electrical contact of device handle and motor housing as well as a simple plug and Removal option for tool handle and mains socket. To be able to transmit the forces and moments, diving the handle, which is preferred as an aluminum profile tube is produced, preferably at least 80 mm into the socket. The detection of whether a device handle or a mains socket is for the The electronics function in the vacuum cleaner is absolutely necessary. If the handle is inserted, the Electronics the potentiometer / switch module integrated in the device handle as a setpoint generator and as a power switch. If the mains socket is plugged in, however, the following applies a potentiometer / switch module installed in the basic device as setpoint generator and as mains switch. To the Mains cable connection in the upper end of the handle contrary to the handle connection only the requirements after an electrical contact and a simple one Possibility of insertion and removal. Height mechanical forces do not occur here. One insertion length of, for example, 80 mm also comes in at this point generally out of the question for reasons of space. From this it follows that the outer profile of the handle and the mains socket is identical, that the detent of Appliance handle and mains socket are identical and that There is a coding of the handle and the mains socket. It also follows that the insertion length of the Device handle preferably at least 80 mm and the insertion length the mains socket is preferably a maximum of 35 mm. The last two dimensions contradict each other seemingly, but can be inventively agree with each other since the electrical contacting within 35 mm behind the insertion opening done, but the device tube is inserted by 80 mm must become. This measure will simultaneously in an elegant way the coding of the handle and Power socket allows. It can also ensure this be that both optional handle and Power socket can be plugged into the motor housing, that only in the upper end of the handle the mains socket is pluggable. Because of the special The contour of the handle and the mains socket remains ensures that the use of power lines, the high number of bending cycles and loads, that occur when operating a vacuum cleaner withstand is excluded. It turns out further it is advantageous that that arranged in the basic device Potentiometer / switch module when the handle is inserted is brought into a position in which the Switch is turned on. This is required because the circuit breakers in the handle and in the motor housing are arranged in series. In the invention The circuit breaker in the Motor housing through the device stem tube inserted by 80 mm pushed into its maximum position. To at a conversion to an above-ground operation is not that Run up the entire device by plugging in the mains socket must be removed when the handle is removed this switch is retracted to its off position become. For this purpose there is a coupling between the circuit breaker and the device stem tube.

Fig. 1

eine perspektivische Darstellung eines erfindungsgemäßen Staubsaugers mit einem Motorgehäuse und einer angeschlossenen Filterkammer, wobei ein Gerätestiel in eine gehäusenahe Steckaufnahme und eine Netzsteckdose in den Gerätestiel eingesteckt sind;

Fig. 2

eine der Fig. 1 entsprechende Darstellung, jedoch nach Abziehen des Gerätestieles vom Motorgehäuse und der Netzsteckdose vom Gerätestiel;

Fig. 3

eine weitere, der Fig. 1 entsprechende Darstellung, jedoch unter Fortlassung des Gerätestieles, wobei hier die Netzsteckdose direkt in die gehäusenahe Steckaufnahme des Motorgehäuses eingesteckt ist;

Fig. 4

eine vergrößerte Detaildarstellung aus der Fig. 2, die gehäusenahe Steckaufnahme zeigend;

Fig. 5

eine Stirnansicht auf die gehäusenahe Steckaufnahme;

Fig. 6

eine weitere perspektivische Detaildarstellung eines mit der Steckaufnahme korrespondierenden Gerätestielendabschnittes, partiell aufgebrochen;

Fig. 7

eine weitere perspektivische Detaildarstellung eines Bereiches einer gerätestielseitigen Dosenaufnahme;

Fig. 8

eine perspektivische Einzeldarstellung der Netzsteckdose;

Fig. 9

eine vergrößerte Stirnansicht auf die Netzsteckdose;

Fig. 10

eine Seitenansicht der Netzsteckdose;

Fig. 11

eine Draufsicht der Netzsteckdose;

Fig. 12

eine Stirnansicht der gerätestielseitigen Dosenaufnahme;

Fig. 13

den Schnitt gemäß der Linie XIII-XIII in Fig. 12;

Fig. 14

eine der Fig. 13 entsprechende Darstellung, jedoch nach einem Einschieben der Netzsteckdose in die Dosenaufnahme;

Fig. 15

eine Schnittdarstellung des Bereiches der gehäusenahen Steckaufnahme des Motorgehäuses;

Fig. 16

eine Herausvergrößerung aus Fig. 15;

Fig. 17

eine der Fig. 15 entsprechende Darstellung, wobei hier der Gerätestiel teilweise in die Steckaufnahme eingeschoben ist, welcher Endbereich des Gerätestieles partiell aufgeschnitten ist;

Fig. 18

eine der Fig. 16 entsprechende Darstellung, jedoch die Stellung gemäß Fig. 17 betreffend;

Fig. 19

eine weitere Darstellung gemäß Fig. 15, jedoch bei vollständig eingeschobenem Gerätestiel;

Fig. 20

eine weitere Darstellung gemäß Fig. 16, jedoch die Darstellung gemäß Fig. 19 betreffend;

Fig. 21

eine der Fig. 19 entsprechende Darstellung, jedoch eine Zwischenstellung im Zuge eines Herausziehens des Gerätestieles aus der Steckaufnahme darstellend;

Fig. 22

eine der Fig. 20 entsprechende Darstellung, jedoch die Stellung gemäß Fig. 21 betreffend;

Fig. 23

eine der Fig. 15 entsprechende Darstellung, jedoch bei in die Steckaufnahme eingesteckter Netzsteckdose;

Fig. 24

eine der Fig. 16 entsprechende Darstellung, jedoch die Stellung gemäß Fig. 23 betreffend.

The invention is explained below with reference to the drawing, which represents only one exemplary embodiment. Here shows:

Fig. 1

a perspective view of a vacuum cleaner according to the invention with a motor housing and a connected filter chamber, a handle being inserted into a plug-in receptacle near the housing and a mains socket being inserted into the handle;

Fig. 2

a representation corresponding to Figure 1, but after removing the handle from the motor housing and the power socket from the handle.

Fig. 3

another, corresponding to Figure 1, but omitting the handle, here the power outlet is plugged directly into the socket near the motor housing.

Fig. 4

an enlarged detail of Figure 2, showing the housing-near plug receptacle.

Fig. 5

an end view of the socket close to the housing;

Fig. 6

a further perspective detailed view of a device handle end section corresponding to the plug-in receptacle, partially broken away;

Fig. 7

a further perspective detailed view of a region of a can holder on the handle side;

Fig. 8

an individual perspective view of the power outlet;

Fig. 9

an enlarged front view of the power outlet;

Fig. 10

a side view of the power outlet;

Fig. 11

a top view of the power outlet;

Fig. 12

an end view of the device handle-side can holder;

Fig. 13

the section along the line XIII-XIII in Fig. 12;

Fig. 14

a representation corresponding to Figure 13, but after inserting the mains socket into the socket holder;

Fig. 15

a sectional view of the area of the plug-in receptacle of the motor housing;

Fig. 16

an enlargement from Fig. 15;

Fig. 17

15 shows a representation corresponding to FIG. 15, the handle being partially inserted into the plug-in receptacle, the end region of the handle being partially cut open;

Fig. 18

a representation corresponding to FIG. 16, but relating to the position according to FIG. 17;

Fig. 19

a further representation according to FIG 15, but with the handle fully inserted;

Fig. 20

a further representation according to FIG. 16, but relating to the representation according to FIG. 19;

Fig. 21

a representation corresponding to FIG. 19, but representing an intermediate position in the course of pulling out the tool handle from the plug-in receptacle;

Fig. 22

a representation corresponding to FIG. 20, but relating to the position according to FIG. 21;

Fig. 23

a representation corresponding to FIG. 15, but with the mains socket inserted into the plug receptacle;

Fig. 24

a representation corresponding to FIG. 16, but relating to the position according to FIG. 23.

Is shown and described initially with reference to Fig. 1 is a vacuum cleaner 1 with a motor housing G and a filter chamber 10. The motor housing G has one Boom 20 with a plug-in receptacle 21. In this Plug receptacle 21 is preferably an aluminum tube trained device handle St inserted. The latter has at its end region facing away from the motor housing G. a handle 22. The electrical connection manufactured via a connecting line 2, which one end a common electrical plug and other ends a mains socket designed as an IEC connector N has. This AC outlet N is related to Fig. 1 in a handle side, the area of Handle 22 assigned socket receptacle 9 inserted.

Point both handle St and motor housing G. one each designed as a potentiometer / switch module Circuit breaker 23, 24 open. These circuit breakers 23, 24 are designed as slide switches, the circuit breaker 23 in the area of the handle 22 and the circuit breaker 24 in the area of Boom 20 of the motor housing G are positioned.

According to the invention, the design is selected so that both the mains socket N from the handle St and the handle St from the motor housing G can be separated.
This is shown, for example, in FIG. 2. This results in the possibility of connecting the power socket N directly to the motor housing via the plug-in receptacle 21 while leaving the device handle St. Such a configuration is shown in FIG. 3. This results in an easy-to-use design for the use of the vacuum cleaner 1 for above-ground work.

With reference to FIGS. 7 to 14, the Mains socket N and the socket holder 9 described in more detail.

The cross-section of the mains socket N is perpendicular to an insertion direction r out of round, with a through the largest dimension axis of symmetry x. As can be seen from Fig. 10, the power socket settles N essentially two in a row arranged areas together. For one thing this is a plug-in area A, which is transverse to Has axis of symmetry x extending division axis y, whereby the cross section into an upper and a lower Area is divided, with the two areas being different Have area dimensions. The second Section of the mains socket N connects to the first section A and forms a connection section B off. At this connection section B is the mentioned connection line 2 arranged, in which Section B is a common train protection, not shown for line 2 is available. Area B is in the form of a truncated pyramid and has ribs 4 on the outside for improved handling on.

The cross section of the insertion area A is above and below the division axis y by one each limited convex curvature K1 and K2, both Curvature lines K1 and K2 essentially in the form of a segment of a circle are. The above the division axis y running curvature line K1 is less strong curved than the one running below the division axis y Curvature line K2, which means that the radius the upper curve K1 is larger than the radius the lower curve K2. In the transition areas U between the different lines of curvature K1 and K2 are each a smooth transition in shape a rounded connecting line is provided. A Connection line between these transition areas U forms the division axis y already mentioned.

The tab receptacles 6 open in the area of the socket face 5 and are rectangular in cross section. Here is the longer side of the rectangular cross section aligned parallel to the axis of symmetry x with a length / width ratio of approx. 15:10 or from 8.5 to 5.5 mm. Parallel to the extension the division axis y are the two tab receptacles 6 spaced about 9 mm apart, this with a symmetrical arrangement to the axis x.

As can be seen from FIG. 9, the tab receptacles are 6 asymmetrical with respect to the division axis y, namely to the cross section with the stronger curved outline K2 out, offset such that a Central axis running parallel to the division axis y of the two tab receptacles 6 approximately through the center of the area F runs.

The circular connector receptacle 7 is between the two tab receptacles 6 arranged and has a circular cross-section. The order is taken so that an axis of symmetry of the Round connector receptacle 7 is congruent with the axis of symmetry x the mains socket N runs and the vertically axis of symmetry of the round plug receptacle extending to this axis 7 almost in height with the lower edges of the Flat connector receptacles 6 is aligned.

The flat connector receptacles 6 have electrically conductive clamping sleeves 8, to which the individual wires of line 2 are connected at the rear are. The round plug receptacle 7 is a blind receptacle, d. H. not conductive, trained.

In the exemplary embodiment shown, the radius is R1 the curve line K1 with approx. 50 mm and the radius R2 the curve line K2 is approx. 37 mm (cf. Fig. 9). The transition areas U between the lines of curvature K1 and K2 are also circular sections educated.

It also follows from these seats that the geometric Center point M1 of the curvature line K1 outside the Total cross-section of the mains socket N is, whereas the geometric center M2 of the line of curvature K2 is arranged within the overall cross section. Both geometric centers M1 and M2 are on the Axis of symmetry x aligned.

Due to the x considered perpendicular to the axis of symmetry asymmetrical design of the cross section there is a center of area F, which is not with the intersection of the axis of symmetry x and the division axis y coincides. It is rather the case that this center of the area F - based on Fig. 9- below the Pitch axis y, d. H. offset towards the more curved line of curvature K2 is formed.

From the geometric dimensions described it follows -related to the cross-section- a width / height ratio from about 17:10. Based on the embodiment one results from the two transition areas U given cross-sectional dimension b of approx. 34 mm and a perpendicular maximum dimension c of approx. 20 mm.

As can be seen further from FIG. 11, the insertion area is A dimensioned so that the length 11 of the insertion area corresponds approximately to the cross-sectional width dimension b.

Furthermore, the power outlet N has one over the Outside surface protruding locking cam 18, which perpendicular to the extension of the tab receptacles 6 is resilient. The arrangement is specific met that the locking cam 18 on the by the Curvature line K1 described the upper outer surface of the Insertion area A is arranged, with central alignment to the flat connector receptacles 6. Next is the position chosen so that the locking cam 18 about in the middle of the longitudinal extent 11 of the insertion area A

This locking cam 18 is opposite one in the insertion area A arranged compression spring 19 displaceable such that the locking cam 18 entirely in the outer wall of the insertion area A.

The positioning of the locking cam 18 on the top the insertion area A and the approximately central positioning there offers the ergonomic advantage of one simply depressing the locking cam 18 by means of Thumb pressure.

The can holder 9 on the handle side settles in essentially of a housing 13 and one in this Housing 13 recessed connector 14 together. This Connector 14 is related to a front, the outer wall the edge of the can holder 9 facing the Housing 13- set back so that in front of the plug 14 forms a cavity. In this cavity protrude on the connector 14 arranged tab 12th into it, the length of these tabs 12 being less is measured as that measured in the same direction Depth of the cavity. The tabs 12 are electrical conductive and rearward in the area of the connector 14 connected to corresponding connecting lines.

As can be seen in particular from FIG. 12, the Can receptacle 9, in particular its housing 13, one Cross section on which corresponds to that of the mains socket N. The inner wall line of the cross section of the housing 13 corresponds to that of the outer line the mains socket N. The corresponding Radii and clear dimensions of the housing 13 are something chosen larger than that of the mains socket N, so that the latter without problems in the can holder 9 or in the cavity 11 can be guided.

The cross section also settles for the can holder 9 from one above and one below a division axis y 'arranged cross-sectional section together. The upper area is of a convex line of curvature K3 and the lower section of a line of curvature K4 limited. Here too the radius is upper curve K3 dimensioned larger than that of bottom line K4.

It can also be seen that both at the mains socket N and also in the case of the can holder 9, the dimension between the two transition areas U clearly is larger than the largest dimension perpendicular to this of the cross section.

The tabs 12 already mentioned are such the connector 14 arranged that when plugging in Mains socket N into the receptacle 9 the flat plug 12 the tab receptacles 6 penetrating into the Enter clamping sleeves 8 to form a coupling. Furthermore, it can be seen from FIGS. 13 and 14 that the length 11 of the insertion area measured in the insertion direction r A the measured in the same direction Depth 12 of the can holder 9 corresponds, so that after inserting the mains socket N into the socket holder 9 only the connection area B of the mains socket N emerges from the can holder 9. Hence result other functions of the two areas A and B.

Area A is the actual coupling area for Achieving a connector. Area B applies as a handling area, in which area the mains socket N is detected for insertion into or execution from the can holder 9.

The can receptacle 9 has 13 in the area of its housing one when inserting the locking cam 18 of the power outlet N shifting against the compression spring 19 Ramp 25 on.

The locking cam 18 takes place in the coupling position according to 14 recording in a bore 26 on the housing side the can holder 9. The by the compression spring 19 in this bore 26 prevented locking cams 18 an unintentional removal of the mains socket N from the Can holder 9.

The release of this coupling is only willful possible. For this purpose, the can receptacle 9 has a touch element 27 on. The latter is on the housing 13 in the area the insertion side on the upper, less curved, outer surface formed by the line of curvature K3 formed. The transition area between the housing 13 and probe element 27 is in one piece resilient, for example by thinning the material in the transition area. Inside is that Probe 27 a down, d. H. towards the bore 26 of the housing 13 facing release fingers 28 molded.

To release the plug connection, the pushbutton element 27 depressed, so that a tilting of the probe element 27 together with the release finger 28, which free end of the release finger 28 the locking cam 18th thus shifted back against the spring force of the compression spring 19, that the locking cam 18 from the area of Housing bore 26 occurs. After that is the subtraction of the Mains socket N enables.

This designing deduction protection is special desirable for vacuum cleaners, because here with a plug device without latching during operation Mains socket N could be unintentionally removed, which is not desirable for security reasons.

The boom 20 having the plug receptacle 21 Motor housing G is tubular. The socket 21 is in a cantilevered End portion of the boom 20 positioned, a Mouth cross section of the plug-in receptacle 21 is the muzzle cross section corresponds to the can holder 9 (cf. 5 and 12). From this it follows that that the inner wall line of the cross section the plug receptacle 21 that of the outer line corresponds to the mains socket N, the radii and clear dimensions of the plug-in receptacle 21 are chosen somewhat larger are than that of the mains socket N, so that the latter without Problems can be performed in the plug receptacle 21.

The cross section also settles in the plug receptacle 21 one above and one below one Division axis y '' arranged cross-sectional section together. The upper area is one convex curvature line K5 and the lower section of limited a line of curvature K6. Here too is the Dimension the radius of the upper curve K5 larger than that of the bottom line K6.

Specifically, this means that the top line of curvature Radius R5 describing K5 essentially corresponds to the radius R1 and the lower one, describing the curvature line K6 Radius R6 essentially the radius R2 of the mains socket N. equivalent.

The plug 29 arranged in the plug receptacle 21 is via a plug base 30 in the plug receptacle 21 attached. The connector base 30 has a cross section on which the hollow profile cross section of the Bracket 20 or the plug receptacle 21 corresponds. The Plug base 30 is a precise fit in the plug receptacle 21 supported and for example with the inner wall of the boom 20 bonded.

The connector 29 assigned to the connector base 30 protrudes starting from the base 30 freely into the space of the plug receptacle 21, for which purpose the plug 29 is reduced in cross section is opposite the connector base 30 or the inner wall the plug-in receptacle 21 one essentially from an upper region of curvature K7 and a lower curvature region K8 Cross section, with dimensions and radii are in a direct relationship to those of the plug receptacle 21st

Due to the cantilevered design of the connector 29 results between the inner wall of the receptacle 31 and the outer wall of the plug 29 an annular Free space 32. In the exemplary embodiment shown is a distance between the plug-in inner wall 31 and connector 29 approx. 3 mm.

The connector 29 and the connector base 30 are preferred materially connected with each other. On the Free end 33 of the connector 29 are flat connectors 34 cantilevered positioned in the receptacle space 21. The latter are in accordance with the tab receptacles 6 of the mains socket N on the end face 33 arranged. As can be seen from Fig. 5, is in the middle between the tabs 34, the lower region of curvature Assigned to K8, a round plug 35 is provided, which also protrudes into the plug-in space 21.

This circular plug 35 is used when the device handle is inserted St for signal transmission of the in the handle St or in its handle 22 arranged circuit breaker 23rd

Both the flat plug 34 and the round plug 35 are electrically conductive and backwards in the area of the Plug 29 or the connector base 30 with corresponding Connection lines 36, which are inside the motor housing G lead to electronics or the like, connected.

The positioning of connector 29 and connector base 30 is selected so that there is a distance 13, measured from the end face 33 to the mouth 37 of the plug receptacle 21, which is the length dimension 11 of the section A corresponds to the mains socket N. In the shown Embodiment is according to the power outlet N selected a dimension 13 of 35 mm. Further follows from this that the dimension 13 of the plug receptacle 21 is equal to that Dimension 12 of the can holder 9 is.

Furthermore, the arrangement is such that the tabs 34 and the circular plug 35 at a distance from the Mouth 37 ends. This also applies to the flat plug 12 in the can holder 9.

The total length 14 is calculated from the addition the first free length 13 and the length 15 of the cantilever Section of the plug 29, measured from the root area 38 up to the end face 33 (cf. Fig. 15). Training is preferred here which, as shown, the dimension 14 at least twice corresponds to dimension 13. In the embodiment shown measures 14 80 mm, which results in a Cantilevered length 15 of the connector 29 is preferred 45 mm results.

In the free areas between the mouth 37 and the end face 33 of the plug 29 has the plug receptacle 21 a locking receptacle 39, in which, for example, the locking cam 18 of the mains socket N can snap into place. This snap shot 39 is with an ejector 40 to disengage a locking pin entering the locking receptacle 39 Mistake. The ejector 40 consists of a flexible Plastic part 41 with an integrated metallic Pressing part 42, which protrudes into the locking receptacle 39. This pressing part 42 can also be made of hard plastic consist. The flexible plastic part 41 is in the area the locking receptacle 39 held so that by simple Press the pressing part onto this plastic part 41 42 is shifted in such a way that one in this latching seat 39 inserted locking cams moved out of the recording becomes the release of the catch.

As already mentioned, is in the boom 20 of the motor housing G arranged a circuit breaker 24, which is designed as a slide switch. In the in the 15 to 24 are sectional views shown only the slide operating handle 43 of the circuit breaker 24 shown, i.e. H. with omission of the potentiometer / switch module to be actuated by the handle 43. However, it is handle 43 in known way connected to this module so that Slide movements of the handle 43 directly onto the module for switching and controlling engine speeds become.

The slide actuation handle 43 lies in a longitudinal slot 44 the wall of the boom 20 free. The Handle 43 passes through this longitudinal slot 44 with a Overhang for a secure grip on the handle 43. Underside, i.e. H. inner wall of the boom jacket the operating handle 43 has a rosette-like collar 45, whose width, measured transversely to the longitudinal extent of the boom 20 is chosen larger than that in the same Direction measured width of the longitudinal slot 44. The length of the collar 45, measured in the longitudinal extent of the boom 20, corresponds approximately to 1.5 times that in length of the longitudinal slot measured in the same direction 44, wherein a length of the measured in the same direction Handle 43 corresponds approximately to half the length of the longitudinal slot. Thus, the is over the entire displacement Handle 43 or the circuit breaker 24 an underside Covering the longitudinal slot 44 given this For example, to the dust-protected location under the longitudinal slot 44 arranged components, such as the potentiometer / switch module.

This results in a displacement path of the handle 43 or the circuit breaker 24 of about 20 to 25 mm.

15 extends in a basic position an upper width edge 46 of the collar 45 at height a connector back 47.

Furthermore, the circuit breaker 24 or its Slide actuation handle 43 a remote actuation extension 48 on which one, from a bottom an area of the collar facing away from the plug 29 45 starting in a basic position according to FIGS. 15 to extends to the end face 33 of the plug 29.

The formation of the remote control extension is concrete 48 chosen so that first a section of starting from the underside of the collar 45, a pointed one Including angle to this, in the area of extends upper width edge 46 of the collar 45. This Section area is in the drawings with the Number 49 marked and is a rigid section trained, with side walls, which are on the Support the underside of the collar 45 or with these are connected in the same material. On top of that Width edge 46 of the collar 45 facing end region section 49 is perpendicular to collar 45 aligned stop 50 is formed, which of the free end of section 49 to the bottom of the collar 45 extends.

In the area of the transition from stop 50 to collar 45 is at the stop 50 in the direction of the plug receptacle 21 freely projecting second section 51 of the remote control extension 48 molded. Through this cantilever Design of the second section 51 has this the possibility of a springy evasion on. The remote control extension has at its free end 52 48 or its second section 51 a Detent formation 53, which in the form of a downward d. H. facing away from the socket inner wall 31 nose-like elevation is formed.

The cantilevered section 51 of the remote control extension 48 lies at least in the area of the latching shape 53 in the between connector 29 and the socket inner wall 31 formed annular space 32. To the The plug base has passage through the plug base area 30 towards the plug-in inner wall 31 open groove 54, the side walls of which are also lateral Lead the section 51 effect.

Corresponding to the socket receptacle 9, the plug receptacle also has 21 a latching cam during an insertion process ramp inclined against a spring 55 on.

6, facing away from the handle 22 free end area of the handle St, which, as already mentioned, is tubular, is with A socket 57 is positioned at a distance 16 from the mouth 56. The latter is, for example, the inner wall of the tubular Device handle St bonded.

The socket 57 points corresponding to the mains socket N. two tab receptacles 58 and one between them two flat plug receptacles 58 arranged round plug receptacle 59 on. Contrary to the mains socket N are in this socket 57 all three recordings 58 and 59 conductive and on the back of the socket 57 to one in the Device handle St connecting cable 60 connected. The two wires of the flat connector receptacles 58 are at the other end with the tabs 12 of the receptacle side Plug 14 connected. That of the round plug holder 59 connected wire leads to the in the circuit breaker 23 arranged in the handle 22. These connections are not shown in detail.

The dimension 16 by which the socket 57 compared to the Mouth 56 in the handle St is moved back, corresponds to dimension 15 of the cantilevered plug 29 in the plug receptacle 21 or the length of the connector 29 and plug-in inner wall 31 formed free space 32nd

The cross-sectional area of the formed on the length 16 Hollow profile 61 is in the area of its outer contour adapted to the mains socket N. One above one The dividing line y '' 'corresponds to the curvature line K9 in their formation of the line of curvature K1 Mains socket N and thus essentially the Curvature line K5 in the area of the plug receptacle 21. Die line of curvature below the dividing line y '' ' K10 therefore corresponds to the Krünimungslinie K2 the Mains socket N and also essentially the line of curvature K6 in the area of the plug receptacle 21.

The wall thickness of the hollow profile 61 is corresponding the width of the free space 32 in the plug receptacle 21 selected. In the embodiment shown the hollow profile 61 has a wall thickness of approx. 3 mm on. This results in inner lines of curvature K11 and K12, which essentially the lines of curvature K7 and K8 correspond to the outer contour of the plug 29.

Furthermore, the training is chosen so that the length 16th of the hollow profile 61 about 2.3 times the largest corresponds to the free dimension of the handle section, which largest free dimension is dimension b of the mains socket N is to be equated.

The handle of the device has approximately the level of the socket 57 St a locking cam protruding beyond the outer surface 62, which corresponds to the mains socket N vertically to extend the tab receptacles 58 of the socket 57 is resilient. This locking cam 62 is in the 17 to 22 are shown.

On the upper one described by the curve K9 Outer surface of the hollow profile 61, on which also the locking cam 62 is arranged, has the hollow profile 61 a locking recess positioned near the mouth 56 63 on.

If the device handle St with its socket-side free end inserted into the socket 21, so first acts on the front of the hollow profile wall in the area of the mouth 56, the free end 52 of the remote control extension 48, which initially at the level of Connector end face 33 is positioned. The flat panel 34 and the round plug 35 are in this position still free in the hollow profile 61 of the handle St on. This position is shown in FIGS. 17 and 18. Another relocation of the St in the direction of arrow r, there is first a dodging the resilient end 52 of the remote control extension 48 such that in the further course of the insertion of the handle of the device, the detent formation 53 in the notch 63 occurs. This has the consequence that at a further shifting the handle St towards r to reach the end position according to FIGS. 19 and 20 the remote control extension 48 via the latching is dragged along, which is a relocation of the circuit breaker 24 or its sliding actuation handle 43 into a maximum position. In the course of this Pushing the device handle St passes in the area of its hollow profile 61 the plug 29 of the plug receptacle 21 by immersing the hollow profile wall in the free space 32. Due to the aspect ratios described above is supported in an end position according to the 19 and 20 the device handle St on the one hand in the area its muzzle-side face on the plug socket 30 and on the other hand in the area of its socket area on the plug end face 33. The Flat plug 34 and the round plug 35 are accommodated in the flat plug receptacles 58 and the round plug receptacle 59 of the socket 57 for coupling the electrical Cables.

In the end position, the locking cam 62 of the tool handle snaps St in the locking receptacle 39 of the connector receptacle 21 a. A lifting of this locking is only emphasized possible by actuating the ejector 40 in this way will that in the flexible plastic part 41st embedded pressing part 42 against the locking cams 62 the spring force shifted back.

The power connection is made via the coupling of the mains socket N and can receptacle 9 according to FIG. 14. In of such a configuration, which is shown in FIG Whole is shown, the vacuum cleaner 1 is a handheld device usable for tillage. Switching on and off of the naturally aspirated engine or its power control takes place via the circuit breaker 23 in the handle 22. The series connected to this circuit breaker 23 Circuit breaker 24 in the motor housing G is in a Full load position shifted.

In order to use the vacuum cleaner 1 for above-ground work, the device handle St is withdrawn from the motor housing G. In this case, if the Device handle St in the direction of arrow r 'according to 21 and 22 entrainment of the remote control extension 48, this is due to the locking of force formation 53 and rest exception 63. This dragging along is only ended as soon as the stop 50 of the remote control extension 48 against the rear of the connector 47 occurs. Thereafter, the detent formation 53 leaves conditionally by the resilient design of section 51, the Resting exception 63. This position defines the off position of the circuit breaker 24. This ensures that pulling the handle St off of the naturally aspirated engine.

After removing the device handle St, you can insert it the mains socket N into the socket 21. This is shown in FIGS. 23 and 24. Here is to recognize that the power socket N with their End face 5 on end face 33 of plug 29 supported. Here too you will find the tabs 34 and Round plug 35 their corresponding tab receptacles 6 or round plug receptacle 7 in the mains socket N, whereby, as already mentioned, the circular connector 7 is only designed as a blind receptacle. conditioned in that the mains socket N is no protruding Has hollow profile, which in the free space 32nd Could occur, the power outlet N is the Remote control extension 48 is neither acted upon nor relocated. From this it follows that with such a Configuration, which is shown as a whole in FIG. 3 is, the circuit breaker 24 first in one Off position remains. A manual, operator-side Operation of the circuit breaker 24 has no effect disruptive to the area of the plug receptacle 21. The Vacuum cleaner 1 is thus in the simplest way for above-ground work designed with the power supply on direct way.

Due to the previously described configurations it is possible to plug the power socket N into both device receptacle-side receptacle 9 as well as in the housing-side connector 21 for power supply insert. The equipment handle St, however, can only be in inserted the plug receptacle 21 of the motor housing G. become. Due to the hollow profile-like design of the The end of the handle is mechanically the one for the corresponding work necessary circuit breakers activated. The design also results the end of the handle that high forces and moments from Device handle St can be transferred to device housing G. can.

All disclosed features are essential to the invention.
The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also included in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims (15)

1. Vacuum cleaner (1) having a motor casing (G), if appropriate having a connected filter chamber (10), and an appliance stem (St), it being possible to plug the appliance stem (St) into a plug receptacle (21) close to the motor casing (G) and a power switch (24) disposed in the motor casing (G) being actuated on plugging in the appliance stem (St), characterized in that the power switch (24), which is formed as a sliding switch, has a remote-actuation extension (48), which is acted on by plugging in the appliance stem (St) while simultaneously actuating the power switch (24).
2. Vacuum cleaner according to Claim 1, characterized in that the remote-actuation extension (48) has a latching projection (53) at its appliance-stem-side end (52) for interaction with a latching recess (63) on the appliance stem (St).
3. Vacuum cleaner according to either of Claims 1 and 2, characterized in that an appliance-stem-side end (52) of the remote-actuation extension (48) is entrained, when the appliance stem (St) is pulled out, to the maximum extent into a position which is displaced rearwards with regard to an opening (37) of the plug receptacle (21).
4. Vacuum cleaner according to one of the preceding claims, characterized in that the appliance-stem-side end (52) of the remote-actuation extension (48) can be displaced within a gap between a plug receptacle inner wall (31) and a plug (29) disposed in the plug receptacle (21).
5. Vacuum cleaner according to Claim 4, characterized in that the displacement is limited by a stop (50) on a plug rear side (47).
6. Vacuum cleaner according to either of Claims 4 and 5, characterized in that the outermost position of the appliance-stem-side end (52) of the remote-actuation extension (48) is aligned with the plug (29) in such a manner that contact lugs (34) disposed on the plug (29) project beyond the free end (52) of the remote-actuation extension (48).
7. Vacuum cleaner (1) according to Claim 6, characterized in that the plug (29) is disposed set back in the plug receptacle (21) in such a manner that the front ends of the contact lugs (34) are situated at a distance from the opening (37) of the plug receptacle (21).
8. Vacuum cleaner according to one of Claims 4 to 7, characterized in that the plug (29) is disposed protruding freely in the plug receptacle (21).
9. Vacuum cleaner according to one of Claims 4 to 8, characterized in that the plug (29) is fastened in the plug receptacle (21) by means of a plug base (30).
10. Vacuum cleaner according to one of Claims 1 to 9, characterized in that the appliance stem (St) can be pushed into the plug receptacle (21) over a dimension (14) which corresponds to at least 1.5 times, preferably double, a maximum free dimension of an appliance-stem cross-section.
11. Vacuum cleaner according to one of Claims 6 to 10, characterized in that the distance (13) from the opening (37) of the plug receptacle (21) to the foot of the contact lugs (34) approximately corresponds to the maximum dimension of the appliance-stem cross-section.
12. Vacuum cleaner according to one of Claims 1 to 11, characterized in that the appliance stem (St) and/or a mains plug-in female connector (N) has a latching stud (18, 62) which projects perpendicular to the plug-in direction (r) and latches in a latching receptacle (39) of the plug receptacle (21).
13. Vacuum cleaner according to Claim 12, characterized in that the latching receptacle (39) is provided with an ejector (40) for disengaging the latching stud (18, 62).
14. Vacuum cleaner according to Claim 13, characterized in that the ejector (40) comprises a flexible plastics part (41) with an incorporated, for example, metallic, throw-out part (42).
15. Vacuum cleaner according to one of Claims 1 to 14, characterized in that the appliance stem (St) on one side has a plug (14) for interacting with the mains plug-in female connector (N), the plug (14) being set back in a socket receptacle (9) of the appliance stem (St) by the dimension (b) of the maximum free cross-section of the mains plug-in female connector (N), in that the appliance stem (St) is formed on the other side as a plug-in female connector (57) for interacting with a plug (29) of the plug receptacle (21), which plug is set back by an identical distance with regard to the appliance-stem-side plug (14), but it being possible for a hollow section (61) of the appliance stem (St) to at least partially cover it and the plug-in female connector (57) of the appliance stem (St) being arranged set back in the hollow section (61) by the amount of the coverage distance (15).

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