EP0886485B1 - Mutually telescopable components - Google Patents

Abstract

The invention relates to mutually telescopable components (3, 5), e.g. pipes, especially vacuum cleaner handle sections, in which selected positions can be engaged by means of a locking component (8), where in addition the locking component (8) has a pressure-operable engagement knob (10) and an engagement projection (13) on the engagement knob (10), where said engagement knob (10) is open for operation on a first telescopic section (5) and the engagement projection (13) engages in a second telescopic section (3). To provide an improved engagement component for telescopic sections, especially one of minimum structural height and with a minimum of parts, it is proposed that the engagement knob (10) project from the outer telescopic section (5) for operation and work together with the inner telescopic section (3) via a rocker-like support.

Description

The invention relates to telescoping Parts, for example pipes, in particular stem sections a vacuum cleaner, with selected positions can be locked by means of a locking element, wherein the locking element also has a locking button, which can be actuated by pressure, and one on the locking button arranged locking projection, with the locking button on an outer telescopic part for actuation is exposed and the locking projection engages in an inner telescopic part, the locking button on the outer telescopic part Actuation protrudes and a rocker-like support by means of a connecting arm with the inner Telescopic part cooperates, and further the connecting arm is rigid and a spring arm is formed is, which is on an inner wall of the outer Telescopic part supports.

Such telescopic handles are known whereby by means of a key unlockable detent Length of the telescoping parts can be changed. In a predetermined position these parts can be fixed again, this in particular by locking. From the state of the Components known in the art, such as in plastic stored button, spring element, locking pin, etc. require a considerable height, so that an accommodation a thickening in a telescopic handle Consequence, especially in the case of stem sections Vacuum cleaner difficult to handle. Are further Known solutions for which locking rockers with axle bearings be used. Such an assembly includes a unilaterally solving moment that only can be compensated for by other components.

So is For example, a locking element known from DE-A1-3 931 639. This is shaped like a seesaw, with a snap nock, which can be deflected into the pipe interior against spring pressure protrudes.

Next is a lock from the FR-A-2 234 882 known in which a pivotable Actuator a seesaw-like in the outer tube supported spring-loaded locking element becomes.

From EP-A-0 286 203 a between an outer and an inner telescopic part Known locking element, with a flexible connection arm between locking button and locking projection.

In view of the state of the art described above becomes the object of the invention therein seen an improved, especially parts and Height-minimized locking element for telescopic specify parts that are brought together.

This task is with Subject matter of claim 1 solved, based on it is that in the shift state only the Snap button caught in the outer telescopic part is, however, the rocker cam and the locking projection freely sliding with the interact inner telescope part.

As a result this embodiment is in the simplest way Locking of the two telescoping ones Allows parts. The entire locking element, which essentially consists of the locking button and the locking projection composed and preferably formed in one piece is, is between the outer and inner telescopic part positioned. As a major advantage it turns out that both the overall height and also minimizes the components of the locking element thus formed are. The rocker-like functioning of the sun formed locking element is by a support achieved on the inner telescopic part. It requires thus none, allowing the locking element to tilt Bracket, such as an axle bracket. Releasing the latch between the two parts brought into one another are carried out by depressing the locking button on the outer telescopic part protrudes for actuation. As a result of the seesaw-like Support is the locking projection arranged on the locking button from one provided on the inner telescopic part Moving recess moves. The two telescopic parts can then be inserted into each other to change the length. In a training course provided that the locking button integrally with a locking projection arranged on the underside of the locking button is connected, the locking projection via a connecting arm is arranged on the side of the locking button. The length of the link arm and the positioning the rocker-like support are chosen so that a slight depression of the locking button already leaving the locking projection from the locking recess of the inner telescopic part. The link arm to the locking projection acts as a Lever arm. An embodiment is preferred in which the connecting arm extends in the longitudinal direction of the telescopic parts, d. H. in the telescopic direction extends. It is further preferred that the entire Locking element in a free end area of the outer Telescopic part, especially near the opening plane, through which the inner telescopic part is immersed is, the connecting arm to the locking projection in has a direction facing away from the opening plane. It proves to be particularly advantageous for production, that on the connecting arm a downward Rocker cam is arranged to rest on an outer surface of the inner telescopic part. Conditional on this The embodiment according to the invention is in the simplest way rocker-like support achieved. This will continue suggested that the rocker cam between the Lock button and the locking projection is arranged. By pushing down the locking button, the whole thing tilts Locking element around on the outer surface of the inner Telescopic part supporting rocker cams such that the one on the side opposite the snap button the rocker cam arranged locking projection from a telescopic inner part-side recess occurs. To one To achieve favorable handling, it is provided that the connecting arm in the area between the rocker cam and the locking projection is chosen longer in length, as the part of the link arm from the rocker cam to Locking button. This provides a favorable lever arm which allows for a relatively light impression the locking button the complete emergence of the locking projection to reach from the recess. For this it is further proposed that the rocker cam outside a projection surface of the locking button arranged is. The latter is preferably light in a floor plan oval shaped. However, there are other floor plans conceivable. It follows that in the direction of extension of the connecting arm measured diameter the locking button at least that, the connecting arm opposite lever arm. To a automatic resetting of the locking element in the To allow rest position, it is further provided that the locking button is further formed with a spring arm for support on an inner wall of the outer telescopic part. The training is chosen so that a Depress the locking button to release the locking against the spring action of the spring arm. Becomes in the course of merging or spreading the Telescopic parts of the locking button released, so the Spring arm a spring-loaded application of the Locking button in its original position. Due the configuration in which the connecting arm between locking button and locking projection rigid the further results from this advantageous effect that the locking projection in the train of telescoping parts into and out of each other spring loaded on the outer surface of the inner Telescopic part lies and independently in the next found detent formation to form the telescopic locking immersed. In a preferred embodiment it is envisaged that the Spring arm essentially in the same direction as that Link arm is aligned. Accordingly, it is preferred the spring arm is equal to the connecting arm in the longitudinal extension align the telescopic parts. The section of the The spring arm is advantageously in the locking button area of the rocker cam facing away. Further it is proposed that two spring arms be provided are. These can be parallel to each other, for example extend, preferably with the connecting arm in the middle the spring arms is arranged. According to the invention it is provided that in the shift state only the snap button in the outer Telescopic part is caught, but the rocker cam and the locking projection freely sliding with the inner telescopic part work together. As a result, the locking element is in easiest way without additional fasteners by the constant engagement of the locking button in the this receiving opening of the outer Telescopic part held captive. The locking button the locking element thus serves both as an actuating as well as a mounting element. The rocker cam and the locking projection slide in the course of a telescope of the two parts freely on the outer wall of the inner Telescopic part, this is preferred after a short time Depress the locking button to release the locking and afterwards the telescoping, whereby in the course the telescopic pressure on the Lock button is canceled. The locking projection supports this due to the aforementioned bias the spring arm on the inner telescopic part. It is but also conceivable that if maintained the pressurization of the locking button in the course of Telescoping the locking projection at a distance from the inner telescopic part slides over this. In this position is only the rocker cam and if necessary, a partial area of the connecting arm the inner telescope part. It is also proposed that that a chamber between the telescopic parts is formed and that the locking element in the chamber is caught without being firmly attached to any of the parts to be. This is a kind of floating storage given the locking element between the telescopic parts. For this purpose, it is further proposed that a chamber floor formed by the outer surface of the inner telescopic part is. The chamber ceiling is preferred by the inner wall formed of the outer telescopic part, one axial delimitation of the chamber preferably by an in radially after the inner wall of the outer telescopic part inside protruding chamber wall is formed. This is spaced from the mouth opening of the outer telescopic part for the passage of the inner telescope part, wherein this mouth opening in use, for example. be closed by a clip-on element can. This is one in both axial and in radial direction closed chamber for storing the Locking element formed. The outer telescopic part associated elements of the chamber form a receptacle for the locking element. In this, the locking element for Assembly inserted in such a way that the locking button through the opening on the telescopic part protrudes. After that the inner telescopic part becomes the outer telescopic part inserted, after which the locking element in captive its position is held. Here is an axial one Limitation by the chamber wall and a flank of the Passage opening for the locking button and a radial Bracket given by the two telescopic parts, being the inner telescopic part any number of notches can have. In a training course it is proposed that a chamber wall the resting state is strengthened by resting on the locking projection. In particular, this chamber wall in the locking position supports a tightening effect. This is solved, for example, by the chamber wall is arranged transversely to the telescopic direction. For this purpose, it is further proposed that the chamber wall in a cross section is arranged obliquely. An embodiment is preferred in which the sloping chamber wall that the locking projection having end region assigned to the locking element is. It is known that the outer telescopic part, for example. when used as the handle of a vacuum cleaner, to be provided with a handle. About this handle a pressure on the outer telescopic part in the axial direction, which However, pressure loading must not lead to the Rest is automatically resolved. Rather, it is intended that it has a tightening effect is. The latter is supported in that axial pressurization of the outer telescopic part the radially inwardly projecting, sloping chamber wall the free end of the connecting arm or directly applied to the area of the locking projection such that the locking projection in the locking position with the recess of the inner telescopic part held down becomes. For the locking element result in Alternating load points in front of and behind the Locking projection. Here, the element is in both Load directions held self-locking. In an advantageous Training is provided that the rocker cam essentially as transverse to the telescopic direction horizontal cylinder is formed. Here, the The diameter of the cylinder must be such that two contact points, one on the outer wall of the inner telescopic part and on the other hand on the inner wall of the outer telescopic part are formed. Hereby is a safe pivoting of the locking element given when actuated. Finally it turns out still advantageous that an extension of the rocker cam larger in the direction transverse to the telescopic direction is as an opening dimension of the recess in the same Direction. When the two parts are telescoped accordingly, the cylindrical rocker cam moves over the Recesses without dipping into them. It it is still conceivable that the rocker cam is independent of its cross-sectional design regarding its aligned transversely to the telescopic direction Extend two-part extension in such a way that a measure between these two parts at least the opening dimension corresponds to the recess. With such a Training slide the two parts of the seesaw nock in the course of a telescope on both sides of the recess past this. The previously described Refinements are both in the Cross-section round as well as non-round, such as oval Telescopic tubes applicable. The entire locking element, consisting of locking button, locking projection, connecting arm, Rocker cams and spring arms are preferred as plastic injection molded parts manufactured. However, there are others Materials conceivable in the area of the spring arms have a corresponding effect. Due this configuration gives the further advantage that a fixation of the entire locking element, for example only by merging the two telescopic parts. A complex storage on one of the two telescopic parts is omitted. This is particularly advantageous in terms of production technology. Furthermore, such a locking element can be inexpensive manufacture, minimizing the overall height and the number of parts reduced to a minimum, preferably to one part is.

Fig. 1

einen teleskopierbar ineinandergeführte Stielabschnitte aufweisenden Staubsauger;

Fig. 2

den Schnitt gemäß zur Linie II - II in Figur 1 durch den Einsteckbereich zwischen einem inneren und einem äußeren Teleskopteil, zur Darstellung der Lage und Funktion eines Rastelementes einer ersten Ausführungsform, in einer Rastposition;

Fig. 3

eine der Figur 2 entsprechende Darstellung, jedoch nach Auflösung der Verrastung zwischen innerem und äußerem Teleskopteil;

Fig. 4

eine Draufsicht auf den Eintrittsbereich und das dort angeordnete Rastelement;

Fig. 5

das Rastelement in einer perspektivischen Einzeldarstellung,

Fig. 6

eine Einzeldarstellung des Rastelementes in einer zweiten Ausführungsform;

Fig. 7

eine Schnittdarstellung gemäß Fig. 2, jedoch die zweite Ausführungsform betreffend, mit in strichpunktierter Linienart dargestellter, niedergedrückter Stellung des Rastelementes zur Auflösung der Verrastung;

Fig. 8

eine vergrößerte Ausschnittsdarstellung gemäß dem Bereich VII-VII in Fig. 7.

The invention is explained in more detail below with reference to the drawings, which only represent two exemplary embodiments. It shows:

Fig. 1

a vacuum cleaner having telescoping stalk sections;

Fig. 2

the section according to the line II - II in Figure 1 through the insertion area between an inner and an outer telescopic part, to show the position and function of a locking element of a first embodiment, in a locking position;

Fig. 3

a representation corresponding to Figure 2, but after releasing the locking between the inner and outer telescopic part;

Fig. 4

a plan view of the entrance area and the locking element arranged there;

Fig. 5

the locking element in a perspective individual representation,

Fig. 6

an individual representation of the locking element in a second embodiment;

Fig. 7

3 shows a sectional illustration according to FIG. 2, but relating to the second embodiment, with the depressed position of the latching element shown in dash-dotted lines to release the latching;

Fig. 8

FIG. 7 shows an enlarged detail representation according to the area VII-VII in FIG. 7.

Is shown and described initially with reference to Figure 1 is a vacuum cleaner 1, which is designed as a handheld device is. The latter has a handle 2, which consists of two telescopic parts put together. A first, inner telescopic part 3 is connected at one end to a vacuum cleaner housing 4 and dips into the outer telescopic part 5 at the other end, which the latter has a handle in its free end area 6 forms.

For entry of the inner telescopic part 3 into the outer Telescopic part 5, the latter has an end face Cross-section exposed mouth opening 7. Near this opening 7 a locking element 8 is positioned, which the locking of inner telescopic part 3 and outer telescopic part 5 causes. To lock in To enable predetermined positions, the inner telescopic part 3 outside of the jacket in the plan approximately circular, at a preselected distance from each other arranged recesses 9.

The locking element 8 according to a first embodiment 2 to 5 has a locking button 10, the Floor plan is oval. On top - with Considered in relation to FIG. 5 - is on the locking button 10 an actuating surface 11 is formed. Next is with Reference to Figure 5 can be seen that the underside of the locking button 10 a connecting arm that repels to the side of this 12 is molded. This extends at oval layout of the locking button 10 in the direction of the smaller diameter of the locking button and is starting from the locking button 10 in the direction of his Free end angled down.

The connecting arm 12 has at its free end on the underside a locking projection 13, which in cross section about the layout of a recess 9 is reproduced, so preferably circular.

The dimensions are further chosen so that one is transverse to Longitudinal extension of the connecting arm 12 measured Width of the same about 0.3 - 0.5 in the same direction measured larger diameter of the locking button 10 corresponds. The locking projection 13 has a diameter on which is chosen lower than that before described width of the connecting arm 12th

There are spring arms on both sides of the connecting arm 12 14 formed, which is also like the connecting arm 12 root below the locking button 10 in these. The spring arms 14 are essentially in the same direction like the connecting arm 12 and are aligned further, against the connecting arm 12, slightly after bent up. Link arm 12 and spring arms 14 extend in the embodiment shown in Direction of the longitudinal extent of the telescopic parts, d. H. in the telescopic direction.

Approximately in the transition area from the spring arms 14 or from Connecting arm 12 to the locking button 10 is below the Link arm 12 a downward rocker cam 15 integrally formed, which is a nose-like in cross section Has shape. This rocker cam 15 is thus in a projection between the locking button 10 and the Positioning projection 13 positioned, the rocker cam further 15 outside a projection surface of the locking button 10 is arranged.

In Figures 2-4, the installation state of the locking element 8 shown. The locking button 10 is for actuation on the outer telescopic part 5, for which the latter has a corresponding passage opening 16. The Locking projection 13 is in a locking recess 9 of the inner Telescopic part 3 occurred, the locking element 8 over the rocker cams 15 on the outer surface of the inner telescopic part 3 is supported. Another The locking element 8 is supported by the spring arms 14, which is on the inner wall of the outer Support the telescopic part 5 resiliently. So it's one given exact position definition of the locking element 8. The in the area between the inner telescopic part 3 and outer telescopic part 5 formed chamber 17 for receiving the locking element 8 can in the region of the mouth opening 7 be closed, for example by means of a clip-on Closure element, not shown.

In the shifting state, only the locking button 10 is in the Area of the passage opening 16 in the outer Telescopic part 5 caught. The on the connecting arm 12th connected rocker cams 15 and the locking projection 13 on the other hand, they slide freely with the inner telescopic part 3 together. The locking element 8 is also in this State in the form between the telescopic parts Chamber 17 caught safely, without the addition of separately trained fastening or locking means. It is thus a kind of floating storage of the Locking element 8 realized in the chamber 17, one Chamber ceiling 18 through the inner surface of the outer Telescopic part 5 and a chamber floor 19 through the outer surface of the inner telescopic part 3 is formed.

Due to the bias caused by the spring arms 14 the locking element 8 is in a basic position according to Figure 2 in a stop-limited stop position acted upon. This is further exacerbated by the seesaw-like Support achieved with the tip of the rocker cam 15 forms the tilt axis of the locking element 8.

The rigid connection arm 12 is in this basic position so aligned that on this Arranged locking projection 13 is also spring biased rests in the recess 9. Because that the diameter of the locking projection 13 in the embodiment shown is dimensioned smaller than the width of the link arm 12 is supported the latter in the locking position on both sides of the locking recess 9 on the outer surface of the inner telescopic part 3 from. However, versions are also conceivable for which the width of the connecting arm 12 the diameter corresponds to the locking projection 13. The one described above Position can only be canceled with emphasis on will.

This resolution of the snap connection between the inner Telescopic part 3 and the outer telescopic part 5 is through simply push the locking button 10 in the direction of arrow P can be carried out (cf. FIG. 3). The Depressing the locking button 10 causes a rocker-like Swiveling the locking element 8, in the course depressing the link arm 12 over the rocker cam 15 is shifted upwards so that underside locking projection 13 from the locking recess 9 of the inner telescopic part 3 occurs. After that is a merging of the two Telescopic parts enables this to change the length of the entire handle 2.

Due to the resilient support of the spring arms 14 on the inner wall of the outer telescopic part 5 the locking element 8 after releasing the locking button 10 moved back into its basic position according to Figure 2. Here, the locking projection 13 is in overlap to a locking recess 9, it turns itself the desired locking position of the two telescopic parts on. However, the locking button 10 in the course of Moving the inner or outer telescopic part released, the latching projection is initially supported 13 on the outer surface of the inner telescopic part 3. As soon as a next recess in the course of moving 9 coincides with the locking projection 13, drives the latter, due to the spring tension, automatically into the recess 9.

The rocker cam 15 has a transverse to the telescopic direction measured width, which is larger than the opening dimension of the recess 9 in the same Direction. In the course of telescoping the two Parts 3 and 5 thus overrun the rocker cam 15 Locking recess 9 without immersing them.

However, training courses are also conceivable in which the width of the rocker cam 15 the opening dimension of the Locking recess 9 corresponds to or is selected smaller. This leads to a short-term with telescoping Entry of the rocker cam 15 into the locking recess 9, but without, due to the cross section nose-like, rounded shape of the rocker cam 15 to achieve a rest stop inhibition.

6 to 8 is a second embodiment shown. Here a locking element 8 is shown, the Connecting arm 12 itself from two approximately the same length Sections 12 'and 12' ', the first, the section 12 'assigned to the locking button 10, has a width measured transversely to the telescopic direction, which is larger than the width of the second Section 12 "in the same direction. This second Section 12 "forms an extension of the first Section 12 'and is, based on the transverse extent of the entire connecting arm 12, in the middle the first section 12 'integrally formed thereon. In the transition area from the first section 12 'to the second section 12 "is the rocker cam 15 in the shape of a cross cylinder lying towards the telescopic direction, whose dimension in transverse extension is that of the first Section 12 'corresponds. The diameter of the cylindrical rocker cam 15 is selected so that segment-like bumps 15 'and 15 "both on the underside as well as the top of the connecting arm 12.

In contrast to the first embodiment described above the rocker cam 15 is not in here immediate area of the locking button 10 but rather in the middle between locking button 10 and locking projection 13 molded from the connecting arm 12.

On both sides of the second section 12 "of the connecting arm 12 are essentially in the same direction as the link arm 12 is aligned, but opposite the connecting arm 12 slightly angled upwards Spring arms 14 are provided, which in both sides of the protruding second connecting arm portion 12 ' Root areas of the cylindrical rocker cam 15.

The locking element 8 thus formed is in a between the inner telescopic part 3 and the outer telescopic part 5 chamber 17 formed floating, the Locking button 10 for actuation through a passage opening 16 of the outer telescopic part 5 protrudes.

The chamber 17 is delimited radially by one Inner wall of the outer telescopic part 5 formed Chamber ceiling 18 and through one through the outer wall of the inner telescopic part 3 formed chamber floor 19. The axial delimitation of chamber 17 is one end through a flank of the passage opening 16 and at the other ends by one of the inner wall of the outer telescopic part 5 chamber wall 20 pointing radially inwards Are defined.

To assemble the locking element 8, this is in the Chamber 17 of the outer telescopic part 5 inserted. To Inserting the inner telescopic part 3 is the locking element held captive in position, this without additional fasteners. The mouth opening 7 of the outer telescopic tube 5 is in the embodiment shown thanks to a clip-on closure element 21 closed.

The locking projection 13 is due to the on the inner wall of the outer telescopic part 5 or on the so formed Chamber ceiling 18 supporting spring arms 14 always in Biased towards a rest position. At a Actuation of the locking element by depressing the Locking button 10 (see arrow P in Fig. 7) tilts it Locking element 8 over the rocker cam 15 or over the segment-like resting on the inner telescope part Hump 15 ', which is an emigration of the locking projection 13 from the notch 9 (see dash-dotted lines Representation in Fig. 7). The cylindrical one Rocker cam 15 can have a diameter which is a support of both the lower hump 15 'on the chamber floor 19 and the upper hump 15 "on the chamber ceiling 18 allows.

The connecting arm 12, in particular the locking projection 13 supporting section 12 "is on the outer wall of the inner telescopic part 3 facing side formed so that this section 12 "in a Locking position - related to the axial extent - on both sides the recess 9 on the outer wall of the inner Telescopic part 3 rests. This results in Alternating load points in front of and behind the Locking projection 13. The locking element is in kept self-locking in both load directions.

In the shifted state according to the dash-dotted line in Fig. 7 is only the locking button 10 in the area the passage opening 16 in the outer telescopic part 5 caught. The rocker cam 15 and the locking projection 13, on the other hand, act freely gliding with the inner Telescope part 3 together.

With a normal use of the telescopic parts, e.g. with a vacuum cleaner 1, the handle 6 Axial pressure on the locking connection exercised. In order to automatically cancel the Preventing latching becomes the tightening effect through the arranged transversely to the telescopic direction Chamber wall 20 supports. The latter is in a cross-section formed obliquely. In the embodiment shown closes the chamber wall 20 to the inner wall of the outer telescopic tube 5 an angle of approx. 93 °. However, there are also Formations conceivable in which the chamber wall one has a smaller or larger angle of attack. The Arrangement of the chamber wall 20 is further selected so that this immediately before the free end of the connecting arm 12 positioned in the region of the locking projection 13 is.

When the telescopic is pressurized Device handle 2 there is a minimal axial displacement of the outer telescopic part 5 in the direction of arrow a (see Fig. 8). Through this acting in the direction of arrow a Force is the free via the sloping chamber wall 20 End of the connecting arm 12 so acted that this with the locking projection arranged on the underside 13 is pressed into the locking position.

The locking projection 13 is in a direction transverse to Telescopic direction equal to the second section 12 '' the connecting arm 12 dimensioned, which results in that the extension of the rocker cam 15 in the same Direction is greater than the locking projection 13 and thus is also greater than an opening dimension of the locking projection 13 adapted locking recesses 9. This has to Consequence that the rocker cam 15, in particular the lower, assigned to the inner telescopic part 3, segment-like Hump 15 'in the course of a telescope over the Locking recesses 9 slides away on both sides of the Locking recesses 9 support. The seesaw cam 15 thus does not occur in the course of the telescoping into the recesses 9.

That consisting of the individual sections described Latching element 8 of both embodiments is of the same material Plastic injection molded part, with what the components are minimized to one part.

The locking element 8 is designed so that a fixation the same through the two telescoping into each other Parts done. A complex storage on one of the No telescopic parts. Furthermore, the invention Locking element on a construction height, which to a minimum is reduced.

Claims (15)

1. Parts (3, 5) guided telescopically one inside the other, for example tubes, in particular handle sections of a vacuum cleaner (1), selected positions being securable by latching by means of a latching element (8), and furthermore the latching element (8) having a latching button (10), which can be actuated by pressing on it, and a latching projection (13) provided on the latching button (10), the latching button (10), for actuation, being exposed at an outer telescopic part (5), and the latching projection (13) engaging in an inner telescopic part (3), the latching button (10), for actuation, projecting at the outer telescopic part (5) and interacting with the inner telescopic part (3) by way of a rocker-like support (15) by means of a connecting arm (12), and furthermore the connecting arm (12) being flexurally rigid, and a spring arm (14), which is supported on an inner wall of the outer telescopic part (5), being provided, characterized in that, in the displaced state, only the latching button (10) is retained in position in the outer telescopic part (5), whereas the rocker lug (15) and the latching projection (13) interact in a freely sliding manner with the inner telescopic part (3).
2. Parts guided telescopically one inside the other according to Claim 1, characterized in that the latching button (10) is connected in one piece to the latching projection (13), which is located on the underside of the latching button (10), the latching projection (13) being located laterally on the latching button (10) by way of the connecting arm (12).
3. Parts guided telescopically one inside the other according to one or more of the preceding claims, characterized in that a rocker lug (15) directed downwards and intended for bearing on an outer surface of the inner telescopic part (3) is provided on the connecting arm (12).
4. Parts guided telescopically one inside the other according to Claim 3, characterized in that the rocker lug (15) is located between the latching button (10) and the latching projection (13).
5. Parts guided telescopically one inside the other according to one or more of the preceding Claims 3 and 4, characterized in that the rocker lug (15) is located outside a projected area of the latching button (10).
6. Parts guided telescopically one inside the other according to one or more of the preceding claims, characterized in that the spring arm (14) is aligned substantially in the same direction as the connecting arm (12).
7. Parts guided telescopically one inside the other according to one or more of the preceding claims, characterized in that two spring arms (14) are provided.
8. Parts guided telescopically one inside the other according to Claim 7, characterized in that the connecting arm (12) is located centrally relative to the spring arms (14).
9. Parts guided telescopically one inside the other according to one or more of the preceding claims, characterized in that a chamber (17) is formed between the telescopic parts (3 and 5), and in that the latching element (8) is retained in position in the chamber (17) without being fixedly connected to one of the parts (3 and 5).
10. Parts guided telescopically one inside the other according to Claim 9, characterized in that a chamber floor (19) is formed by the outer surface of the inner telescopic part (3).
11. Parts guided telescopically one inside the other according to one or more of the preceding Claims 9 and 10, characterized in that a chamber wall (20) reinforces the latched state by bearing on the latching projection (13).
12. Parts guided telescopically one inside the other according to Claim 11, characterized in that the chamber wall (20) is arranged transversely to the telescoping direction.
13. Parts guided telescopically one inside the other according to one or more of the preceding Claims 11 and 12, characterized in that the chamber wall (20) is arranged to run at a slope in a cross section.
14. Parts guided telescopically one inside the other according to one or more of the preceding Claims 3 to 13, characterized in that the rocker lug (15) is provided substantially as a cylinder lying transversely to the telescoping direction.
15. Parts guided telescopically one inside the other according to Claim 14, characterized in that the extent of the rocker lug (15) in the direction transverse to the telescoping direction is greater than the aperture size of the latching recess (9) in the same direction.

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