EP0835632B1 - Adjustable electrical connection device for telescopic vacuum cleaner hose - Google Patents

Description

The invention relates to an adjustable power transmission device for a vacuum cleaner telescopic tube.

With the suction pipe of a vacuum cleaner, cleaning tools are occasionally also used coupled, which itself an electric drive, e.g. a motor-driven brush roller exhibit. For the electrical supply of such a drive, it is known to lay the electrical line along the intake manifold, via which the drive from an Vacuum cleaner housing provided socket is supplied. Problems then arise with the pipe routing on the suction pipe, if this is a telescopic pipe that is adjustable in length. In this case, the line can no longer easily be laid along the intake manifold become.

The invention is therefore based on the object of an adjustable power transmission device to create a vacuum cleaner tube designed as a telescopic tube.

This object is achieved by means of an adjustable power transmission device, according to claim 1 or claim 13.

Power transmission device are also adjusted when adjusting the telescopic tube by these tubular parts are pushed or pulled apart accordingly. The sliding contacts slide along the electrically conductive tracks, so that the Power supply both during the adjustment and after the adjustment of the Pipe sections of the telescopic tube is guaranteed. These are for the power supply necessary plug and line parts are concealed in the tubular parts. This tubular parts are detachably coupled to the telescopic tube. That is the possibility given such an adjustable power transmission device even later to attach a telescopic tube provided with the corresponding coupling elements.

A high stability is achieved in that the one tubular part as circumferential closed tube, in particular square tube, is formed, and on its inner walls at least two electrically conductive metal strips are provided.

Characterized in that the one tubular part made of two joinable U-shaped rails exists, the electrical elements can be assembled before joining the two rails can be attached to the rails unhindered.

The power transmission device can be attached to a telescopic tube in a simple manner Way in that the one tubular part provided at both ends with coupling elements is, with corresponding coupling elements provided on the telescopic tube match. The coupling elements can be U-shaped at both ends as the coupling elements Rail of a tubular part facing outward ribs provided be inserted into the groove-like recesses provided on the vacuum cleaner telescopic tube are.

A structurally simple plug-in device results from the fact that on one End of the inner U-shaped rail in the holes of the two opposite Leg pins of the rail connecting cross bar guided contact pins are provided. The contact pins can be U-shaped before joining the two Rails are inserted into the holes in the cross bar.

The contact connection of the contact pins is made when joining the two U-shaped Rails produced automatically in that the contact pins are provided with connecting lugs are provided by a pressure member provided on the outer U-shaped rail are pressed against the electrically conductive tracks. The pressure member can also simultaneously serve to axially lock the contact pins in the holes in the cross bar. With that the contact pins are adequately fixed.

It is also advantageous if as electrically conductive tracks on the opposite Leg walls of the inner U-shaped rail an electrically conductive covering is applied. Such a covering applied to the leg walls does not require any additional space requirement.

Adequate mechanical stability for the other tubular part is achieved that this is designed as a circumferentially closed tube, at one end of one Socket and at the other end of which the sliding contacts are arranged.

Manufacturing is facilitated by the fact that the sliding contacts on a separate, at the opening of the tube attachable support part are arranged. Such, with The sliding part provided with the sliding contacts can be separated without hindrance any parts of the power transmission device are manufactured.

The connection of a cleaning tool provided with an electric drive is particularly simplified in that one at the other end of the other tubular part the sliding contacts electrically connected contact socket is attached.

For the stability of the electrical connection of the power transmission device with the electric drive of the cleaning tool helps that at the free end of the other tubular part on the outer circumference of plug-in strips are formed, which in corresponding, on the connecting piece of a cleaning tool that can be plugged into the telescopic tube trained recorders fit.

Another solution to the problem is by means of an adjustable power transmission device possible, which consists of at least two telescoping, with the pipe sections of the Telescopic tube mechanically coupled, hollow tube-like parts, which are at their each other opposite ends are each provided with an electrical connector that via a multi-core electrical line laid in the interior of the hollow tube-like parts are connected, at least one in the one compared to the other hollow tube-like Part of the fixed tubular pipe part arranged as a coil is trained. The hollow tube-like coupled with the tube sections of the telescopic tube Parts of the power transmission device are used when adjusting the telescopic tube adjusted by pushing these tubular parts into each other or be pulled apart. The part of the line designed as a helix is correspondingly the movement of the hollow tube-like parts either pulled apart or pushed together so that the power supply both during adjustment and after adjusting the pipe sections of the telescopic pipe is guaranteed. The hollow tube-like parts are detachably coupled to the telescopic tube. So that's it Possibility given such an adjustable power transmission device subsequently on a telescopic tube provided with the corresponding coupling elements to install.

The necessary mounting of the length-adjustable line part is simple thereby achieved that the line part designed as a coil both in the area of the Plug device provided end of a hollow tube-like part and in the area of by means of the end of the other hollow-tube-like part inserted into a hollow-tube-like part a clamping element made of elastic material is clamped strain relieved.

The clamping element is expediently designed as a plug, which has a through opening for the line in which the line when inserting the plug into the hollow tube-like parts is clamped.

FIG. 1

eine an ein Staubsaugerteleskoprohr angekoppelte Stromübertragungseinrichtung im Längsschnitt,

FIG. 2

eine an ein Staubsaugerteleskoprohr angekoppelte Stromübertragungseinheit im Längsschnitt in einer gegenüber der Fig. 1 um 90° gedrehten Lage,

Fig. 3

eine Stromübertragungseinrichtung im Schnitt entlang der Linie III-III in FIG. 2,

FIG. 4

eine Stromübertragungseinrichtung im Schnitt entlang der Linie IV-IV in FIG. 2,

FIG. 5

eine Stromübertragungseinrichtung im Schnitt entlang der Linie V-V in FIG. 2,

FIG. 6

das eine Ende einer äußeren U-förmigen Schiene im Detail,

FIG. 7

das eine Ende einer inneren U-förmigen Schiene im Detail,

FIG. 8

eine weitere Ausführungsvariante einer an einem Staubsaugerteleskoprohr angekoppelten Stromübertragungseinrichtung,

FIG. 9

eine Stromübertragungseinrichtung im Schnitt entlang der Linie IX-IX in FIG.. 8 und

FIG. 10

eine Stromübertragungseinrichtung im Schnitt entlang der Linie X-X in FIG.. 8,

FIG. 11

eine weitere an ein Staubsaugerteleskoprohr angekoppelte Stromübertragungseinrichtung im Längsschnitt,

FIG. 12

eine Stromübertragungseinrichtung im Schnitt entlang der Linie XII-XII in FIG..11 und

FIG. 13

eine Stromübertragungseinrichtung im Schnitt entlang der Linie XIII-XIII in FIG. 11.

The invention is described in more detail below with reference to an exemplary embodiment shown in the drawing.
It shows:

FIG. 1

a longitudinally sectioned power transmission device coupled to a vacuum cleaner telescopic tube,

FIG. 2

2 shows a longitudinal section of a power transmission unit coupled to a vacuum cleaner telescopic tube in a position rotated by 90 ° with respect to FIG. 1,

Fig. 3

a current transmission device in section along the line III-III in FIG. 2,

FIG. 4

a current transmission device in section along the line IV-IV in FIG. 2,

FIG. 5

a current transmission device in section along the line VV in FIG. 2,

FIG. 6

one end of an outer U-shaped rail in detail,

FIG. 7

one end of an inner U-shaped rail in detail,

FIG. 8th

another embodiment of a power transmission device coupled to a vacuum cleaner telescopic tube,

FIG. 9

a current transmission device in section along the line IX-IX in FIG .. 8 and

FIG. 10

a current transmission device in section along the line XX in FIG .. 8,

FIG. 11

another power transmission device coupled to a vacuum cleaner telescopic tube in longitudinal section,

FIG. 12

a current transmission device in section along the line XII-XII in FIG..11 and

FIG. 13

a current transmission device in section along the line XIII-XIII in FIG. 11th

With 1a and 1b are two telescopic tube sections of a vacuum cleaner telescopic tube 1 designated. On these pipe sections 1a and 1b is an adjustable Power transmission device 2 arranged detachably. The power transmission device 2 has two tubular parts 3 and 4, which can also be pushed into one another.

One tubular part 3 consists of an outer U-shaped rail 5 and one in the U-space 6 of this rail 5 insertable inner U-shaped rail 7. The inner rail 7 is in the position with its open side facing the open side of the outer rail 5 in the outer rail 5 inserted. A circumferentially closed channel 8 is thus formed. In this channel 8, the other circumferentially formed as a closed tube can tubular part 4 are moved axially back and forth. This other tubular part 4 is before Joining the two U-shaped rails 5 and 7 inserted into the inner rail 7. Corresponding locking elements between the two tubular parts 3 and 4 are provided, by which a complete pulling out of the other tubular Part 4 from a tubular part 3 is prevented.

On the opposite leg walls 9 of the inner U-shaped rail 7 an electrically conductive covering 10 is provided. This covering 10 is at one end 11 the inner U-shaped rail 7 provided contact pins 12 electrically connected. The contact pins 12 are in a lying between the two leg walls 9 Cross bar 13 provided holes 14 inserted. On her, the interior of the interior End facing U-shaped rail 7 are elastic on the contact pins 12 Contact flags 15 attached. These contact tabs 15 are formed by a on the outer U-shaped Rail 5 integrally formed, bridge-like pressure member 16 against the conductive coating 10 of the leg walls 9 pressed. In this way, a conductive connection between the conductive coating 10 of the two leg walls 9 and the contact pins 12. The pressing member 16 is also arranged on the U-shaped rail 5 that it Holds contact pins 12 in the axial direction in the bores 14.

At the end of the other tubular part 4, which is inserted into the one tubular part 3, a supporting part 18 provided with sliding contacts 17 is arranged. The sliding contacts 17 rest on the electrically conductive covering 10 of the leg walls 9. The sliding contacts 17 are in turn connected via lines 19 laid in the cavity of the other tubular part 4 to a contact socket 21 attached to the free end 20 of this tubular part 4.
In the contact socket 21 can be provided on the connecting piece 22 of a cleaning tool, for example a brush sweeper, plug pins 23 which are in turn electrically connected to the drive motor of the cleaning tool. There is thus a continuous electrical connection from the contact pins 12 to this drive motor. A plug is connected to the contact pins 12 via an electrical line and connected to a socket provided on the vacuum cleaner housing.

The outer U-shaped rail 5 of a tubular part 3 is at both ends with provided on the outside facing ribs 24. At the ends of a pipe section 1a of the Telescopic tube 1, the groove 24 adapted groove-like recesses 25 are formed. One of the tubular parts 3 can be axially inserted into the groove-like recesses 25 with its ribs 24 are inserted and is thus releasably attached to the telescopic tube 1.

In the same way that a tubular part 3 is coupled to the telescopic tube 1 also the other tubular part 4 mechanically on the connecting piece 22 of the cleaning tool be coupled, i.e. also the free end of the other tubular Part 4 is provided with the ribs 24 corresponding plug strips 26, which in corresponding on the connecting piece 22 trained receiving grooves 27 can be inserted.

With a length adjustment of the telescopic tube 1, the two tube sections 1 a and 1b pushed or pulled apart. The one tube section 1a slides over the other pipe section 1b. At the same time, the one with a pipe section coupled a tubular part 3 of the power transmission device over the other tubular part 4 pushed or pulled. The sliding contacts 17 of this tubular part 4 slide along the electrically conductive coating 10 of the leg walls 9, so that also during and after an adjustment of the telescopic tube 1, the electrical connection to Drive motor of the cleaning tool is retained.

The power transmission device 2 can be handled as a separate part and can therefore also can be retrofitted to an existing telescopic tube unit.

In the embodiment variants shown in FIG. 8, this is a tubular part as circumferential closed square tube 28 formed. This square tube 28 is in its cross section dimensioned such that the other tubular part 4 in the interior of the square tube 28th can be inserted.

Are on the inside of two opposite tube walls 29 of the square tube 28 electrically conductive metal strips 30 arranged. These show on their long sides Metal strip 30 on holding legs 31 pointing obliquely outwards. With these holding legs 31 are the metal strips 30 in opposite on the inside of the other two Pipe walls 32 provided guides 33 inserted.

At one end 11 of the square tube 28 is a plug part provided with contact pins 12 34 inserted into the square tube 28 and held by locking. On the contact pins 12 elastic contact tabs 15 are again provided. When inserting the contact pins 12 in the holes 14 provided on the plug part 34, the contact tracks 15 Undercuts 35 of the plug 34 locked. Since the contact tabs 15 wider than that Diameters of the holes 14 are dimensioned, these are also on the body 36 of Plug part 34 and thus fix the contact pins 12 in the axial direction.

On the plug-in part 34 there are guide ribs on the other opposite tube walls 32 37 molded. When inserting the plug part 34 into the square tube 28, the slides Metal strip 30 along the guide ribs 37 along and finally meets the result of the Locking on the undercuts 35 inclined contact tabs 15. This is the electrically conductive connection between the contact pins 12 and the metal strips 30 produced automatically when attaching the plug part 34 to the square tube 28.

The current transmission device 2 according to FIG. 11 has two hollow tube-like parts 3a and 4a that can be plugged into each other. For this purpose, a hollow tube-like part 3a is dimensioned such that the other hollow tube-like part 4a fits into the hollow interior of one part 3a and thus can be pushed into or pulled out of this part 3a. There is one complete extraction of the other hollow tube-like part 4a by a corresponding one Stop prevented.

At one end 11 of a hollow tube-like part 3a is a contact pin 12 containing Pin 47 arranged. This plug-in part 47 has a tubular extension 38, with which the plug-in part 47 is inserted into the hollow tube-like part 3a and held by latching is. In the tubular extension 38 is a flexible element acting as a clamping element Material of existing plug 39 used. By a provided in this plug 39 Through opening 40, one end of a multi-core line 41 is passed. The Wires of the line 41 are electrically conductively connected to the contact pins 12.

At the end 42 of the other hollow-tube-like part inserted into the one hollow-tube-like part Part 4a is a lead-through element also made of elastic material 43 inserted into the hollow tube-like part 4a. The line 41 is through a corresponding one Passage opening of this lead-through element 43 passed through. The lead-through element 43 has a radially outward over the core inserted into the hollow tube-like part 4a protruding collar edge 44. This collar edge 44 works together with one in the hollow tube-like part 3a inserted the end sleeve 45 as the extension path of the other hollow tube-like part 4a limiting stop.

The line 41 extending through the other hollow tube-like part 4a is with its Veins to the contacts one at the free end 20 of the other hollow tube-like part 4a arranged contact socket 21 connected. In the contact socket 21 can Connection piece 22 of a cleaning tool, for. B. a brush header, provided Plug pins 23 are introduced, which in turn with the drive motor of the Cleaning tool are electrically connected. So there is of the contact pins 12 up to this drive motor a continuous electrical connection. To the Contact pins 12 are connected via an electrical line to a vacuum cleaner housing provided socket connected plug connected.

The one hollow tube-like part 3a is at both ends with outwardly pointing ribs 24 provided. At the ends of a tube section 1a of the telescopic tube 1 are the Ribs 24 adapted, groove-like recesses 25 formed (Fig.12). The one Hollow tube-like part 3a can axially into the groove-like recesses 25 with its ribs 24 are inserted and is thus releasably attached to the telescopic tube.

In the same way as a hollow tube-like part 3a is coupled to the telescopic tube, can also the other hollow tube-like part 4a mechanically to the connecting piece 22 of the Cleaning tool are coupled, d. H. also the free end of the other Hollow tube-like part 4a is provided with corresponding ribs 24 on the ribs 24 can be inserted into corresponding receiving grooves 27 formed on the connecting piece 22 (Fig.13).

With a length adjustment of the telescopic tube 1, the two tube sections 1a and 1b pushed or pulled apart. The one tube section 1a slides over the other pipe section 1b. At the same time, the one with a pipe section coupled a hollow tube-like part 3a of the power transmission device 2 over the other hollow tube-like part 4a pushed or pulled.

Since the line part of the line 41 running in the one hollow tube-like part 3a serves as a helix 46 is formed, the line 41 can correspond to the respective displacement movement of the hollow tube-like parts 3 and 4a are stretched or compressed as shown in FIG. 11 is indicated. The movement of the corresponding parts is thus determined by the Line 41 is not disabled. Since the line 41 from the contact pins 12 to the contacts the contact socket 21 runs continuously, is a perfect electrical connection ensured between these contact parts.

Claims (16)

1. Vacuum cleaner telescopic pipe with an adjustable current conduction device which comprises at least two pipe sections (1a and 1b) which can be pushed into one another, wherein a first cable cover (3) is mechanically coupled externally to an outer pipe section (1a) and a second cable cover (4) is mechanically coupled externally to an inner pipe section (1b) and the cable covers are provided at mutually opposite ends thereof each with a respective electrical plug device (12 or 22), the first cable cover (3) being provided at its inner wall with at least two electrically conductive tracks (10) connected with its plug device (12) and the second cable cover (4) having a number, which corresponds with the number of electrically conductive tracks (10), of wiper contacts (17) which are connected with its plug device (21) and which slide along the tracks (10) during adjustment of the cable covers (3 and 4), characterised in that the first cable cover (3) is constructed as a circumferentially closed first tubular member (3) which is mechanically coupled with the outer pipe section (1a) and the second cable cover (4) is constructed as a circumferentially closed second tubular member (4) which is mechanically coupled with the inner pipe section (1b).
2. Current conduction device according to claim 1, characterised in that the tubular members (3 and 4) are detachably coupled with the vacuum cleaner telescopic pipe.
3. Current conduction device according to claim 1, characterised in that the first tubular member (3) consists of two U-shaped rails (5, 7) able to be joined together.
4. Current conduction device according to claim 2 or 3, characterised in that the first tubular member (3) is provided at both ends with coupling elements (24) which interfit with corresponding coupling elements (25) provided at the vacuum cleaner telescopic tube (1).
5. Current conduction device according to claim 4, characterised in that outwardly facing ribs (24) are provided as coupling elements at the first tubular member (3) and are insertable into groove-like recesses (25) provided at the vacuum cleaner telescopic pipe (1).
6. Current conduction device according to claim 3, characterised in that contact pins (12) are provided at one end of the inwardly disposed U-shaped rail (7) and are guided in bores (14) of a transverse strip (13) connecting the two mutually opposite limb walls (9) of the rail (7).
7. Current conduction device according to claim 6, characterised in that the contact pins (12) are provided with terminal lugs (15) which are pressed against the electrically conductive tracks (10) by a presser element (16) provided at the outwardly disposed U-shaped rail (5).
8. Current conduction device according to claim 1 or 3, characterised in that an electrically conductive coating is applied as electrically conductive tracks (10) to the mutually opposite limb walls (9) of the inwardly disposed U-shaped rail (7).
9. Current conduction device according to one of the preceding claims, characterised in that a plug device (21) is arranged at one end of the second tubular member (4) and the wiper contacts (17) are arranged at the other end of that member.
10. Current conduction device according to claim 9, characterised in that the wiper contacts (17) are arranged at a separate carrier member (18) which can be plugged on at the opening of the second tubular member (4).
11. Current conduction device according to claim 9, characterised in that a contact bush (21) electrically conductively connected with the wiper contacts (17) is mounted at the other end of the second tubular member (4).
12. Current conduction device according to one of the preceding claims, characterised in that plug strips (26) are constructed at the free end of the second tubular member (4) at the outer circumference thereof and fit in corresponding receiving grooves (27) formed at the connecting stub pipe (22) of a cleaning tool able to be plugged onto the telescopic pipe (1).
13. Adjustable current conduction device for a vacuum cleaner telescopic pipe, with at least two pipe sections (1a, 1b) which can be pushed into one another, wherein a first cable cover (3) constructed as a circumferentially closed first tubular member (3a) is mechanically coupled to the outer pipe section (1 a) and a second cable cover (4) constructed as a circumferentially closed second tubular member (4a) is mechanically coupled to the inner pipe section (1b) and a multi-core electrical cable (41) is laid in the interior space of the tubular members (3a, 4a) and is formed as a helix (46) at least in the cable part arranged in the first tubular member (3a), characterised in that the cable covers (3, 4) can be externally coupled to the pipe sections (1a, 1b) and are provided at the mutually opposite ends thereof each with a respective electrical plug device (12 or 21).
14. Current conduction device according to claim 13, characterised in that the cable covers (3, 4) are removably coupled with the vacuum cleaner telescopic pipe.
15. Current conduction device according to claim 13 or 14, characterised in that the cable part formed as a helix (46) is fixedly clamped by means of a clamping element (39 or 43) in tension-relieving manner not only in the region of the end (11) of the first tubular member (3a) provided with the plug device (12), but also in the region of the end (42) of the second tubular member (4a) inserted into the first tubular member (3a).
16. Current conduction device according to claim 15, characterised in that the clamping element (39 or 43) is constructed as a stopper which consists of resilient material and which has a passage opening (40) for the cable (41), in which the cable (41) is fixedly clamped on introduction of the stopper into the tubular members (3a, 4a).

Images