EP1055388B1 - Telescopic vacuum cleaner suction pipe - Google Patents

Abstract

A vacuum-cleaner pipe assembly can have inner and outer pipes telescopingly engaged with one another and on a sleeve surrounding the inner pipe, a locking body which engages in selected detents formed on the inner pipe. A rocker or rotatable eccentric in a housing on the sleeve surrounding the inner pipe bears directly against the locking body and is biased by a spring into the locking position.

Description

The invention relates to a telescopic Vacuum cleaner suction pipe according to the preamble of claim 1.

Such a telescopic vacuum cleaner suction pipe is already from DE-GM 297 19 437.2 of the applicant known. With these basically advantageous Vacuum cleaner suction pipe engages a locking body with his Locking pin into the locking holes in the inner tube. There these must be stamped, it can - conditionally through the embossing process - however, reveal that the Side surfaces of the locking holes are not exactly rectangular, but arranged obliquely to the longitudinal central axis of the tubes are. In this case, with a larger axial load of the telescopic vacuum cleaner suction tube radial force component acting on the locking body arise through which the locking pin inadvertently moved radially outwards and thereby the locking device releases.

Another telescopic Vacuum cleaner pipe is from Patent Abstracts of Japan vol. 018, no. 257 (C-1200), May 17th 1994 & JP 06038910 A where known however, no actuating device separate from the blocking body is disclosed is.

The object of the invention is therefore a to create new telescopic vacuum cleaner suction pipe, in the case of construction, the case described above cannot occur.

The solution to this problem results from the Features of claim 1.

The solution according to the invention has the essential Advantage that even when high axial forces are applied and possible formation of on the locking body acting radial forces of the locked state remains safely preserved. This is achieved in that the rotating body directly - without interposition for example a spring - so on the locking body acts that this in its position mechanically is locked. The spring arranged on the rotating body is only there for the rotating body automatically to bring in the locked position and ultimately should when large axial forces occur, acting on the blocking body Radial forces do not absorb any forces.

In one embodiment of the invention, the Rotating body as an actuating or latch rocker trained that with sliding block-like axis projections in scenes arranged on the housing is slidably mounted. This embodiment is characterized on the one hand by a safe Locking effect in that the mutual Bolt surfaces of the actuating or bolt rocker and the Locking body with a certain pressure in the locked Press condition against each other. There is also a high one Ease of use, since only by creating a low actuation pressure the actuation or Bolt rocker can be brought into the unlocked state can. Ultimately, even a minor Movement of the actuating or latch rocker due to the combined pivoting and sliding movement of the unlocked Condition can be achieved.

So that the effort to unlock or to Lock the vacuum cleaner suction pipe again if possible the actuating or latch rocker next to it is low the one for the locked state on the locking body load-bearing latch surface one for the unlocked state existing sliding surface with an inclined surface of the blocking body cooperates.

In a preferred embodiment is above the locking body can also be pivoted on the cuff arranged, this happening in particular can that the locking body via a swivel arm is firmly attached to the cuff. this has particular advantages in manufacturing and also Assembly of the telescopic vacuum cleaner suction pipe, there the locking body, which is actually only a few millimeters in size thus has a fixed assignment to the cuff.

In a further embodiment of the invention the actuating latch rocker has a rotary bearing.

In a preferred embodiment, the Invention possible that the rotary body as in Housing rotatably mounted eccentric component is. In this very precisely working embodiment the eccentric component has one for the Locking state on the locking body load Locking surface and one during the unlocked state resulting freedom of movement for the locking body.

Fig. 1 eine Seitenansicht eines teleskopierbaren Staubsauger-Saugrohres mit einer Verstelleinrichtung im entriegelten Zustand,

Fig. 2 ein Längsschnitt durch eine Vorrichtung nach Fig. 1,

Fig. 3 eine Seitenansicht einer Vorrichtung gemäß Fig. 1 im verriegelten Zustand,

Fig. 4 ein Längsschnitt durch eine Vorrichtung gemäß Fig. 3,

Fig. 5 bis 9 unterschiedliche Darstellungen einer Betätigungs- bzw. Riegelwippe,

Fig. 10 bis 14 verschiedene Ansichten einer Manschette einschließlich Gehäuse,

Fig. 15 und 16 unterschiedliche Darstellungen eines Sperrkörpers,

Fig. 17 eine Seitenansicht einer weiteren Staubsauger-Teleskoprohranordnung einschließlich Verstelleinrichtung im verriegelten Zustand,

Fig. 18 ein Längsschnitt durch eine Teleskoprohranordnung gemäß Fig. 17,

Fig. 19 eine Seitenansicht einer Teleskoprohranordnung gemäß Fig. 17 im entriegelten Zustand,

Fig. 20 ein Längsschnitt durch eine Teleskoprohranordnung gemäß Fig. 19,

Fig. 21 bis 25 unterschiedliche Darstellungen einer Manschette einschließlich an geformten Gehäuses,

Fig. 26 bis 30 verschiedene Darstellungen einer Betätigungs- bzw. Riegelwippe,

Fig. 31 eine Seitenansicht einer weiteren Verstelleinrichtung für eine Staubsauger-Teleskoprohr-Anordnung,

Fig. 32 eine Längsschnittdarstellung durch die Verstelleinrichtung gemäß Fig. 31 im entriegelten Zustand,

Fig. 33 eine Längsschnittdarstellung durch die Verstelleinrichtung gemäß Fig. 31 im verriegelten Zustand,

Fig. 34 und 35 weitere Längsschnittdarstellungen durch eine die Verstelleinrichtung gemäß Fig. 31 im entriegelten Zustand,

Fig. 36 eine perspektivische Darstellungen einer Schenkelfeder,

Fig. 37 bis 40 verschiedene Darstellungen eines Exzenterbauteils,

Fig. 41 bis 46 verschiedenen Darstellungen der Manschette einschließlich Gehäuse und

Fig. 47 bis 50 unterschiedliche Darstellungen eines Verkleidungsbauteils.

Further advantages of the invention result from the following dependent claims and from the exemplary embodiments shown in the description of the figures. Show it:

1 is a side view of a telescopic vacuum cleaner suction pipe with an adjusting device in the unlocked state,

2 shows a longitudinal section through a device according to FIG. 1,

3 shows a side view of a device according to FIG. 1 in the locked state,

4 shows a longitudinal section through a device according to FIG. 3,

5 to 9 different representations of an actuating or latch rocker,

10 to 14 different views of a cuff including housing,

15 and 16 different representations of a locking body,

17 is a side view of a further vacuum cleaner telescopic tube arrangement including adjusting device in the locked state,

18 shows a longitudinal section through a telescopic tube arrangement according to FIG. 17,

19 is a side view of a telescopic tube arrangement according to FIG. 17 in the unlocked state,

20 shows a longitudinal section through a telescopic tube arrangement according to FIG. 19,

21 to 25 different representations of a cuff including molded housing,

26 to 30 different representations of an actuating or latch rocker,

31 is a side view of a further adjustment device for a vacuum cleaner telescopic tube arrangement,

32 shows a longitudinal sectional view through the adjusting device according to FIG. 31 in the unlocked state,

33 is a longitudinal sectional view through the adjusting device according to FIG. 31 in the locked state,

34 and 35 further longitudinal sectional representations through an adjusting device according to FIG. 31 in the unlocked state,

36 is a perspective view of a leg spring,

37 to 40 different representations of an eccentric component,

Fig. 41 to 46 different representations of the cuff including housing and

47 to 50 different representations of a cladding component.

In the drawings is a vacuum cleaner telescopic tube assembly including adjustment device designated with the reference number 10.

The telescopic tube arrangement 10 has Inner tube 11, an outer tube 12 and one Adjustment device 13. The inner tube 11 is with a locking bar 15 consisting of recesses 14 Mistake. The recesses 14 each have Counter-blocking surfaces 16, the one with blocking surfaces 17 Blocking body 18 cooperate.

The adjusting device 13 has a Outer tube 12 arranged in an annular space 19 between Outer and inner tube 11 and 12 extending sleeve 20 on which a housing 21 is formed (see FIGS. 10 to 14).

The housing 21 is for receiving the locking body 18 (see FIGS. 15 and 16) and an actuating or Latch rocker 22 including a rocker spring 23 intended. The parallel to a longitudinal central axis x the Pipes 11 and 12 have extending side walls 24 a kidney-shaped, backdrop-like opening 25 (see FIGS. 10 to 14). Inside is below the opening 25 in each case a bearing shell 26 is formed. In the bottom 27 of the housing you can see a circular opening 28 in the Blocking body 18 is used. One-sided edge is on this opening 28 a the locking body 18 in the Unlocked position supporting projection 29 molded.

5 to 9 is an actuating or Bolt rocker 22 shown. On both sides of the actuation and rocker switch 22 are each sliding block-like Axial projections 30 formed. The actuation or Latch rocker 22 has one for finger actuation provided, with a slightly rising Actuating surface 31 provided rocker arm 32 and one Rocker arm 33, which is only a cover function for has the housing 21.

Below the axis projections 30 is a Formed actuation projection 34, the Locking body 18 facing end surface 35 as a locking surface is formed while a side surface 36 the Has function of a sliding surface. 4 can be seen that the locking surface 35 in the locked Flat condition on an opposite surface 37 of the locking body 18 bears. In contrast, Fig. 2 shows the unlocked state in which the sliding surface 36 on a Inclined surface 38 of the locking body 18 abuts. Under other in this drawing you can see that it through an irregular formation of the sliding surface 36 only a punctiform or linear one partial contact of the sliding surface 36 on the Inclined surface 38 comes through which the friction between the Sliding surface 36 and the inclined surface 38 is reduced.

Ultimately, one can still see in FIGS. 2 and 4 the rocker spring 23 between the projection 29 of the Housing 21 and a lower surface 39 of the rocker arm 32 is arranged on pegs formed thereon.

The adjustment device 13 is assembled at inserted inner tube 11 in that the first Locking body 18 in the opening 28 of the housing 21 is introduced. Then the actuation or Bolt rocker 22 pressed into the housing 21. by virtue of a certain excess of the actuation or Bolt rocker 22 opposite in the area of the axis projections 30 an interior width b of the housing 21 must Actuate or latch rocker 22 with a slight bend apart the side walls 24 with a certain Force in the backdrop-like openings 25 be pushed in. At the same time, however, the assembly the rocker spring 23 on the pin provided for this purpose (see above).

After the actuation or Locking rocker 22 is the adjusting device 13 operational. 4 shows the Locking position. Here is the burden of Rocker spring 23 pressed into the locked state Rocker 22 by means of its locking surface 35 on the locking surface 37 of the locking body 18, so that there is a mechanical locking of the locking body 18 results. Also when larger axial forces occur and on the Locking body 18 acting radial forces can not unintentional unlocking happen. By exercising a certain operating force P, which is greater than that Must be force of the rocker spring 23, the actuating or latch rocker 22 by a combined swivel and Sliding movement in the position shown in FIG. 2 are moved. Due to the combined swivel and slide movement can despite a small path of the rocker arm 32 a relative large movement of the actuating projection 34 and in particular the locking surface 35 and the sliding surface 36 can be reached in the position shown in Fig. 2. If there is an axial force on the Telescopic tube assembly is exercised, the locking body 18 dodge and an adjustment of Allow tubes 11 and 12 against each other. If none Force P acts more on the rocker arm 32, the Actuator or latch rocker 22 by the rocker spring 23 back into the locked state according to FIG. 4 automatically moved back.

17 to 30 is another Adjustment device 42 for an inner tube 11 and Outer tube 12 shown. This adjustment device 13 has a sleeve 43 and an integrally molded thereon Housing 44 on. The housing 44 is with a opening 45 on the bottom and with in side walls 46 arranged axis recordings 47 provided.

18 and 20 in conjunction with FIG. 29 it can be seen that within the opening 45 of the Housing 44 via a swivel arm 48, a locking body 49 is arranged cohesively on the cuff 43. The Pivotal movement of the locking body 49 can can be achieved, for example, by the fact that Transition area from the swivel arm 48 to the sleeve 43 after Kind of a film seam or at least in the form of a Material weak zone 50 is formed.

21 to 25 is that to this Actuating or Bolt rocker 51 shown. The rocker 51 has one Through hole 52 for a bolt, not shown on. This acts as an axis of rotation for the rocker 51 Bolt is in the assembly through the axle mounts 47 and bore 52 and inserted through the later Snap a cladding component, not shown (see, for example, FIGS. 47 to 49 for the following exemplary embodiment) secured. Below the bore 52 is a locking projection 53 is arranged. This too The actuating or locking rocker 51 has two rocker arms 54 and 55 on. The rocker arm 54 is on the one hand on the top provided with an actuating surface 56 and on the other underside as abutment for a between the Cuff 43 and the rocker arm 54 on each molded rocker arranged rocker spring 57 is provided.

18 and 20 is the operation of the Adjustment device 52 shown. In the 18 can be seen that the Locking projection 53 with its locking surface 58 a locking surface 59 of the locking body 49 bears. there is the locking position by the Rocker spring 57 secured, but none from one Axial loading of the pipe arrangement resulting forces receives. Rather, this arrangement results in a complete mechanical interlocking except for the In the event of destruction, it can absorb all axial forces.

If you now on the operating surface 56 of the Rocker arm 54 exerts a force P with a finger that is greater than the spring force of the rocker spring 57 a rotary movement of the rocker 51 and in particular the Locking projection 53 clockwise. hereby the locking projection 53 is out of the movement path of the locking body 49 moves, so that at one Axial load, i.e. when pulling apart Inner tube 11 and outer tube 12 of the locking body 49 a Make evasive movement and thus unlock can. This can be seen in FIG. 20.

Finally, FIGS. 31 to 49 show another one Embodiment, which in turn consists of a Sleeve 60 and a housing 61 (see FIGS. 41 to 46) consists.

For example, as in Fig. 32 and also in 44, this cuff 60 also has a blocking body 62, which has a swivel arm 63 is integrally arranged on the cuff 60. to has better mobility of the swivel arm 63 the latter in the transition area to the cuff 60, however a window-like recess 84 (see FIG. 44). In the 44 is further below the Cutout 84 is arranged in the cuff 60 Anti-rotation lock 85 can be seen (see also FIGS. 42 and 45). On the outer surface of the sleeve 60, the housing 61 a latching tab 86 is also opposite available to attach the cuff 60 on Outer tube 12 in a corresponding locking recess 87 serves (see Fig. 32 and 33).

Also in this embodiment are on Side walls 64 of a housing 61 axle receptacles 65 arranged (see Fig. 41 to 46), for a Eccentric component 66 are provided, which in FIGS to 40 is shown. In addition, the Outside of the side walls 64 locking means 67 for an in 47 to 49, the covering component 68 formed. It can be seen in FIG. 49 that the Cladding component 68 has counter-latching means 69 which when attached to the housing 64 with the there existing locking means 67 cooperate. 49 is ultimately an opening 88 within one Countersink 89 of the trim component 68 shown. The eccentric component 66 projects through the opening 88 and is due to the depression 89 in a simple manner can be operated with one finger.

In the housing 61, the eccentric component 66 With the help of a bolt 76 acting as an axis of rotation (see FIG. 32 and 33) are used. The eccentric component 66 assigns For this purpose, a through hole 70 on the Bolt 76 takes. When installing the eccentric component 66 however, a leg spring 71 is so on the bolt 76 in Area provided for the leg spring 71 Recess 90 of the eccentric component 66 mounted that - as can be clearly seen in FIG. 34, a leg 72 on Eccentric component 66 and a leg 73 on one Stop surface 74 of the housing 61 abuts, a Spring body 75 on the in the through hole 70 of the Eccentric component 66 arranged bolt 76 pushed is.

Ultimately, a side flank 77 of the Eccentric component 66 (see Fig. 35 and Fig. 39) with two Stop lugs 78 each have an end position define the eccentric component 66. Another Side surface 77 'is arranged with the recess 90 the leg spring 71 as shown in FIGS. 37 and 40 shown. That with a corrugated, easy to grip Surface 79 provided eccentric component 66 is thus in the Housing 61 fastened with the bolt 76 that in the locking position shown in Fig. 33 Eccentric area 80 forms a locking surface 81, which the locking surface 82 of the locking body 62 rests. In this position of the eccentric component 66 is one complete mechanical locking of tubes 11 and 12 Guaranteed even with large axial loads. Important is in this context also that the leg spring 71 so is arranged that the eccentric component 66 always is automatically brought into the locking position, which is defined by one of the stop lug 78.

If you now the eccentric 66 against Clockwise with one finger to the other Stop lug 78 rotates, one points out of the resulting eccentric construction of the component 66 Free space 83 in the direction of the blocking body 62 and enables it - as shown in Fig. 32 - when it occurs an axial load or one caused thereby Relative movement of the tubes 11 and 12 in the direction of Dodge eccentric component 66.

Claims (12)

1. Telescopable vacuum-cleaner suction pipe (10) having an outer pipe (12), an inner pipe (11) provided at its external side with an axially extending detent strip (15), at least one locking body (18) which has locking surfaces, is movable in the direction of a longitudinal centre axis (x) of the vacuum-cleaner suction pipe and can temporarily engage in detent recesses (14) of the detent strip which are provided with mating locking surfaces, a sleeve which is arranged on the outer pipe, extends over the inner pipe and has a housing in which the locking body, a spring securing the locking position and an actuating device (22) for the locking body are arranged, the actuating device (22) being separated from the locking body, characterised in that the actuating device is designed as a rotating body (22, 51, 66) acting directly on the locking body (18, 49, 62) and in that the locking position of the rotating body (22, 51, 66) is secured by the spring (23, 57, 71).
2. Vacuum-cleaner suction pipe according to Claim 1, characterised in that the rotating body is designed as an actuating or locking rocker (22) which is mounted in a pivotably movable and slidably movable manner, by way of sliding-block-like axial projections (30), in guide slots (25) arranged on the housing (21).
3. Vacuum-cleaner suction pipe according to Claim 1 or 2, characterised in that the actuating or locking rocker (22) has, for the locking state, a locking surface which bears on the locking body (18) and, for the unlocked state, a sliding surface (36) which cooperates with an oblique surface (38) of the locking body (18).
4. Vacuum-cleaner suction pipe according to one of the preceding claims, characterised in that the locking body (49, 62) is arranged in a pivotably movable manner on the sleeve (43, 60).
5. Vacuum-cleaner suction pipe according to Claim 4, characterised in that the locking body (49, 62) is fastened in a materially joined manner to the sleeve (43, 60) via a pivot arm (48, 63).
6. Vacuum-cleaner suction pipe according to one of the preceding claims, characterised in that the actuating or locking rocker (51) is rotatably mounted.
7. Vacuum-cleaner suction pipe according to one of the preceding claims, characterised in that the rotating body is designed as an eccentric component (66) rotatably mounted in the housing (61).
8. Vacuum-cleaner suction pipe according to Claim 7, characterised in that the eccentric component (66) has, for the locking state, a locking surface (81) which bears on the locking body (62) and, for the unlocked state, a movement clearance (83) for the locking body (62).
9. Vacuum-cleaner suction pipe according to one of the preceding claims, characterised in that the housing (21, 44, 61) is integrally connected to the sleeve (20, 43, 60), which fills an annular space (19) between the outer pipe (12) and the inner pipe (11).
10. Vacuum-cleaner suction pipe according to one of the preceding claims, characterised in that the sleeve integrally connected to the housing externally encompasses the outer pipe, and the locking body engages in the detent strip through an opening provided in the outer pipe.
11. Vacuum-cleaner suction pipe according to one of Claims 2, 3, or 6, characterised in that the actuating or locking rocker (22, 51) is designed as a cover for the housing (21, 44).
12. Vacuum-cleaner suction pipe according to Claim 7, characterised in that, to cover the housing (61), there can be fastened to the latter a covering component (68) which extends beyond the contour of the housing (61) and has an opening (88) for the eccentric component (66).

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