U.S. patent application number 16/082048 was filed with the patent office on 2019-06-06 for vacuum-cleaner suction tube.
This patent application is currently assigned to FISCHER ROHRTECHNIK GMBH. The applicant listed for this patent is FISCHER ROHRTECHNIK GMBH. Invention is credited to Martin Cordes, Stephan Cordes.
Application Number | 20190167057 16/082048 |
Document ID | / |
Family ID | 58228159 |
Filed Date | 2019-06-06 |
United States Patent
Application |
20190167057 |
Kind Code |
A1 |
Cordes; Martin ; et
al. |
June 6, 2019 |
VACUUM-CLEANER SUCTION TUBE
Abstract
A method for manufacturing vacuum cleaner suction tube with at
least one inner tube, at least one outer tube, at least one
actuating mechanism and at least one end sleeve inserted into the
outer tube, wherein the end sleeve is disposed between the inner
tube and the outer tube, wherein the end sleeve has at least one
end sleeve recess, wherein the outer tube has at least one outer
tube recess, and wherein the inner tube has a plurality of snap-in
depressions. The vacuum cleaner suction tube produced provides a
reliable and leak-free connection to an attachment element when
using any type of plastic for the attachment element is achieved by
the axial movement of the end sleeve relative to the outer tube
being blocked by the actuating mechanism and inwardly directed
radial movement of the actuating mechanism relative to the outer
tube is blocked by the inner tube.
Inventors: |
Cordes; Martin; (Sundern,
DE) ; Cordes; Stephan; (Arnsberg, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FISCHER ROHRTECHNIK GMBH |
Achern-Fautenbach |
|
DE |
|
|
Assignee: |
FISCHER ROHRTECHNIK GMBH
Achern-Fautenbach
DE
|
Family ID: |
58228159 |
Appl. No.: |
16/082048 |
Filed: |
March 6, 2017 |
PCT Filed: |
March 6, 2017 |
PCT NO: |
PCT/EP2017/055161 |
371 Date: |
September 4, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47L 9/244 20130101 |
International
Class: |
A47L 9/24 20060101
A47L009/24 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 12, 2016 |
DE |
10 2016 104 557.8 |
Claims
1-11. (canceled)
12. A vacuum cleaner suction tube, comprising: at least one inner
tube, at least one outer tube, at least one actuating mechanism and
at least one end sleeve inserted into the outer tube, wherein the
end sleeve is arranged between the inner tube and the outer tube,
wherein the end sleeve has at least one end sleeve recess, wherein
the outer tube has at least one outer tube recess, wherein the
inner tube has a plurality of snap-in depressions, wherein the
actuating mechanism passes through the outer tube recess and
comprises a base plate having at least one snap-in recess and at
least one locking device, wherein the locking device is movable
from a locking position into at least one unlocking position,
wherein the locking device passes through the end sleeve recess in
the locking position in a direction toward the inner tube, wherein
the locking device is in engagement with at least one snap-in
recess on the inner tube in the locking position, wherein, in the
unlocking position, a shifting of the inner tube relative to the
outer tube is enabled by the locking device, wherein an axial
movement of the end sleeve relative to the outer tube is blocked by
the actuating mechanism and wherein an inwardly directed radial
movement of the actuating mechanism relative to the outer tube is
blocked by the inner tube.
13. The vacuum cleaner suction tube according to claim 12, wherein
an outwardly directed radial movement of the actuating mechanism
relative to the outer tube is blocked by the outer tube.
14. The vacuum cleaner suction tube according to claim 12, wherein
the end sleeve recess has approximately the same size as the base
plate, so that the base plate engages positively in the end sleeve
recess.
15. The vacuum cleaner suction tube according to claim 12, wherein
the actuating mechanism has a friction connection to the end sleeve
so that axial movement of the end sleeve relative to the outer tube
is blocked.
16. The vacuum cleaner suction tube according to claim 12, wherein
the end sleeve has an insertion end and an outer end and that the
insertion end is conical in at least one region.
17. The vacuum cleaner suction tube according to claim 16, wherein
at least one stop is provided at the outer end.
18. The vacuum cleaner suction tube according to claim 17, wherein
the stop is formed by an enlargement of the outer diameter (D) of
the end sleeve.
19. The vacuum cleaner suction tube according to claim 12, wherein
the outer tube has exactly one outer tube recess.
20. The vacuum cleaner suction tube according to claim 12, wherein
the inner tube comprises at least one longitudinal groove and that
at least one tongue corresponding to the longitudinal groove is
formed on the end sleeve so that the inner tube is guided by the
end sleeve in the outer tube.
21. The vacuum cleaner suction tube according to a claim 12,
wherein the inner tube comprises at least one longitudinal groove
and wherein at least one tongue corresponding to the longitudinal
groove is formed on the outer tube so that the inner tube is guided
in the outer tube.
22. A method for manufacturing a vacuum cleaner suction tube having
at least one inner tube, at least one outer tube, at least one
actuating mechanism and at least one end sleeve, wherein the end
sleeve has at least one end sleeve recess, wherein the outer tube
has at least one outer tube recess, wherein the inner tube has a
plurality of snap-in depressions, and wherein the actuating
mechanism has a base plate having at least one snap-in recess,
comprising the steps of: guiding the actuating mechanism from
inside of the outer tube through the outer tube recess, inserting
the end sleeve into the outer tube and blocking axial movement of
the end sleeve by the actuating mechanism and inserting the inner
tube into the end sleeve and blocking radial movement of the
actuating mechanism by the inner tube.
Description
BACKGROUND OF THE INVENTION
Field of the Invention
[0001] The present invention concerns a vacuum cleaner suction tube
with at least one inner tube, with at least one outer tube, with at
least one actuating mechanism and with at least one end sleeve
inserted into the outer tube. The end sleeve is located between the
inner tube and the outer tube and has at least one end sleeve
recess. The outer tube has at least one outer tube recess and the
inner tube has a plurality of snap-in depressions. The actuating
mechanism passes through the outer tube recess, wherein the
actuating mechanism comprises a base plate having at least one
snap-in recess, wherein the actuating mechanism comprises at least
one locking device, wherein the locking device is movable from a
locking position into at least one unlocking position. In the
locking position, the locking device passes through the end sleeve
recess in the direction of the inner tube, wherein the locking
device is engaged with at least one snap-in depression on the inner
tube in the locking position, and, in the unlocking position, a
shifting of the inner tube relative to the outer tube is enabled by
the locking device.
Description of Related Art
[0002] Vacuum cleaner suction tubes are known from the prior art in
a variety of designs. Telescopic vacuum cleaner tubes offer the
advantage that they can be adapted to the body size of a user or to
different application situations during use for short or long
distances by changing the length, on the one hand to enable
ergonomic operation and on the other hand to ensure a
multi-functional application of the vacuum cleaner for different
vacuuming tasks.
[0003] To achieve telescoping capability, such vacuum cleaner
suction tubes usually comprise a plurality of tube segments which
are arranged one behind the other and inserted into one another so
that they can be telescoped relative to one another by axially
shifting the tube segments. To change the length of the vacuum
cleaner suction tube, the user manually moves the tube segments,
i.e. pushes them axially into each other or on top of each other.
Various snap-in mechanisms are known for locking a certain position
of the tube segments, which reliably prevent unwanted relative
movement of the tube segments during use of the vacuum cleaner
suction tube. Recesses in the walls of the tube segments are often
used, which interact with corresponding blocking elements on the
other tube segments.
[0004] In addition, vacuum cleaner suction tubes are often made of
stainless steel, with add-on elements, for example, of plastic,
attached at least in the two end areas of a vacuum cleaner suction
tube. The attachment elements are advantageously pushed onto the
vacuum cleaner suction tube or inserted into the vacuum cleaner
suction tube. A special requirement is the leak-free sealing
between the vacuum cleaner suction tube and the attachment
element.
[0005] Prior art vacuum cleaner suction tubes often have the
disadvantage that reliable sealing between the vacuum cleaner
suction tube and the attachment element cannot be sufficiently
ensured, especially when certain plastics are used for the
attachment elements.
[0006] Based on the above prior art, the object of the invention is
to provide a vacuum cleaner suction tube and a method for
manufacturing a vacuum cleaner suction tube which enables a
reliable and leak-free connection with an attachment element when
using any type of plastic for the attachment element.
SUMMARY OF THE INVENTION
[0007] The aforementioned object is initially and essentially
achieved by a vacuum cleaner suction tube according to the
invention in that an axial shifting of the end sleeve relative to
the outer tube is blocked by the actuating mechanism and that an
inwardly directed radial movement of the actuating mechanism
relative to the outer tube is blocked by the inner tube. In this
manner, the individual components of the vacuum cleaner suction
tube fix themselves mutually. It is not necessary that separate
openings are formed on the outer tube to fix the end sleeve, as
this is blocked in movement by the actuating mechanism. One
advantage of the invention is therefore that the sealing-ability of
the vacuum cleaner suction tube is increased, since only the most
necessary openings are formed on the outer tube, preferably made of
stainless steel.
[0008] In order to further improve the fixing of the individual
components, one design of the vacuum cleaner suction tube provides
that an outwardly directed radial movement of the actuating
mechanism relative to the outer tube is blocked by the outer tube.
Conversely, an outwardly directed radial movement of the actuating
mechanism relative to the outer tube is blocked by the actuating
mechanism or by the base plate. The base plate is dimensioned in
such a way that the actuating mechanism passes through the recess
in the outer tube in an outward direction, but the base plate
remains inside the outer tube and strikes the wall of the outer
tube. It is therefore not possible to push or pull the actuating
mechanism out of the outer tube in the radial direction.
[0009] The actuating mechanism can lock the end sleeve in position
in various ways. In one design of the vacuum cleaner suction tube,
it is provided that the end sleeve recess has approximately the
same size as the dimensions of the base plate, so that the base
plate engages positively into the end sleeve recess. The thickness
of the base plate, i.e., the extension of the base plate in the
radial direction, corresponds approximately to the thickness of the
end sleeve. The base plate can therefore be lowered into the end
sleeve recess so that the base plate is aligned with the end sleeve
when viewed in the axial direction, i.e. the base plate does not
project beyond the edge of the end sleeve facing the inner tube.
The end sleeve can be inserted into the outer tube during
production of the vacuum cleaner suction tube, wherein the
actuating mechanism is already located in the outer tube. The end
sleeve is inserted into the outer tube until the corresponding
elements, i.e. the base plate of the actuating mechanism and the
end sleeve recess, engage with one another. If the end sleeve
receives an impulse of movement in this position, the contours of
the end sleeve recess hit the base plate and movement is prevented.
The thicker the material of the end sleeve, the deeper the end
sleeve recess can be. Consequently, the area with which the end
sleeve is supported on the base plate of the actuating mechanism
via the end sleeve recess is also increased, insofar as the
material thickness of the base plate, i.e. the height of the base
plate, corresponds to the material thickness of the end sleeve.
However, with increasing material thickness, the installation
effort of the vacuum cleaner suction tube increases, since the end
sleeve must be guided past the base plate during insertion before
the base plate can engage into the end sleeve recess. The skilled
person must therefore be careful to find a compromise between
material thickness and simple installation.
[0010] The end sleeve recess does not necessarily have to depict a
complete recess. One possibility of design is, for example, a
depression into which the base plate can engage, wherein recesses
can be formed in the depression so that only the elements of the
locking device pass through the end sleeve recess, which contribute
to a locking of the vacuum cleaner suction tube.
[0011] Alternatively, it is provided in one design of the vacuum
cleaner suction tube that the actuating mechanism is frictionally
connected to the end sleeve so that axial movement of the end
sleeve relative to the outer tube is blocked. In this manner, the
end sleeve is simply inserted into the outer tube, wherein the
actuating mechanism or the base plate of the actuating mechanism
exerts sufficient friction on the end sleeve so that the end sleeve
can no longer be easily removed from the outer tube. In this
configuration, the size and design of the end sleeve recess is
irrelevant as long as it ensures that, in the locking position, the
locking device can pass through the end sleeve recess towards the
inner tube, so that, in the locking position, the locking device
engages with at least one snap-in depression on the inner tube and
a movement of outer tube and inner tube relative to one another is
blocked.
[0012] One advantageous design provides that the end sleeve has
elongated crosspieces which act as spacers from outer tube to end
sleeve, wherein the end sleeve is then only connected to the outer
tube via the crosspieces. In this manner, for example, the material
thickness of the base plate or the actuating mechanism can be
selected independently of the end sleeve. If the base plate is
relatively thick, it may not be possible to insert the end sleeve
without damage. The design of the elongated crosspieces, whose
arrangement can be selected so that the base plate is arranged at a
distance of two crosspieces, can be selected so that the end sleeve
can still be inserted into the outer tube, but the friction between
end sleeve and base plate is so great that removal of the end
sleeve is not easily possible. The arrangement and number of
crosspieces can be more or less freely chosen. A recess or material
removal in the end sleeve at the point where the actuating
mechanism is connected to the end sleeve is also conceivable, so
that there are no crosspieces at all, but the end sleeve only has a
slightly smaller material thickness in the area where the end
sleeve comes into contact with the base plate.
[0013] For easier installation of the end sleeve, a further design
of the vacuum cleaner suction tube provides that the end sleeve has
an insertion end and an outer end and that the insertion end is
conical in at least one region. The region in which the insertion
end is conical should be approximately as large as the width of the
base plate. The end sleeve can thus be inserted more easily into
the outer tube, since the friction between the base plate and end
sleeve is not too high due to the tapered area. The sleeve can thus
be easily inserted into the outer tube until it reaches its desired
position, for example until the end sleeve recess and base plate
engage.
[0014] To prevent the end sleeve from being inserted too far into
the outer tube, a further advantageous design of the vacuum cleaner
suction tube provides for at least one stop at the outer end. The
stop can cover only a small area or several small areas of the
outer end.
[0015] In a further advantageous design, however, it is provided
that the stop is formed by an enlargement in the outer diameter of
the end sleeve. The stop is therefore designed circumferentially.
For example, the stop can be designed in such a manner that the
material is curved in the region of the enlarged outer diameter by
a channel directed towards the insertion end. The end sleeve thus
does not only strike at the end of the outer tube, but surrounds
the end of the outer tube. Since the outer tube is usually made of
stainless steel or another metal, the ends of the outer tube can be
sharp-edged. The channel shape of the stop encloses the sharp edge
so that the risk of injury is minimized. The material in the region
of the enlarged outer diameter does not have to be the same
material as the rest of the end sleeve. A foam or rubber compound
can additionally increase the sealing-ability at the end of the
tube and accordingly also further reduce the risk of injury, as the
material is softer than conventional plastics.
[0016] In a further advantageous design of the vacuum cleaner
suction tube according to the invention, it is provided that the
outer tube has exactly one outer tube recess. One of the advantages
of the vacuum cleaner suction tube according to the invention is
that the end sleeve is not attached separately to the outer tube,
but is held in the outer tube by the interaction of the individual
components. To improve the pressure loss and flow characteristics
of a vacuum cleaner suction tube, as few openings as possible in
the outer tube are advantageous. With the vacuum cleaner suction
tube according to the invention, only one recess is necessary as
long as no further components have to be attached to the outer
tube. With only one recess, however, the locking device can
interact with the inner tube, on the one hand, and the components
can be securely connected to one another on the other hand.
[0017] In order to further improve the interaction of the
individual components, a further design of the vacuum cleaner
suction tube provides that the inner tube comprises at least one
longitudinal groove and that at least one tongue corresponding to
the longitudinal groove is formed on the end sleeve so that the
inner tube is guided by the end sleeve in the outer tube. To ensure
that the locking device can always engage in the corresponding
snap-in depressions of the inner tube, it is advantageous to
prevent the inner tube from rotating. This can be easily achieved
by a tongue and groove design on the inner tube and end sleeve. For
example, the groove can also be formed inside the end sleeve,
wherein a corresponding tongue is provided on the inner tube.
[0018] Alternatively, it can be provided in a further design that
the inner tube comprises at least one longitudinal groove and that
at least one tongue corresponding to the longitudinal groove is
formed on the outer tube so that the inner tube is guided from
within the outer tube. Also with this design, the longitudinal
groove can be formed, for example, inside the outer tube, wherein
the corresponding tongue is formed on the inner tube. The groove on
the outer tube, for example, can be implemented by deformation of
the tube or by two folds in the outer tube, so that a V-shaped
groove is created in the outer tube.
[0019] The invention also relates to a method for manufacturing a
vacuum cleaner suction tube, with at least one inner tube, with at
least one outer tube, with at least one actuating mechanism and
with at least one end sleeve, wherein the end sleeve has at least
one end sleeve recess, wherein the outer tube has at least one
outer tube recess, wherein the inner tube has a plurality of
snap-in depressions and wherein the actuating mechanism has a base
plate having at least one snap-in recess.
[0020] The object described at the outset is essentially achieved
by the method in that the actuating mechanism is led from the
inside of the outer tube through the outer tube recess, that the
end sleeve is inserted into the outer tube and is blocked in axial
movement by the actuating mechanism, and that the inner tube is
inserted into the end sleeve and the actuating mechanism is blocked
in radial movement by the inner tube. A logical sequence for
assembling the vacuum cleaner suction tube is divided into the
following steps: inserting the actuation mechanism into the outer
tube, inserting the end sleeve into the outer tube and locking the
end sleeve using the actuation mechanism and finally inserting the
inner tube. To ensure a secure connection of the elements of the
vacuum cleaner suction tube, no further elements are necessary, as
the individual components hold one another.
[0021] In detail, there is a plurality of possibilities for
designing and further developing the vacuum cleaner suction tube
and the method for manufacturing a vacuum cleaner suction tube as
will be apparent from the following description of preferred
embodiments in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a schematic representation of an assembled vacuum
cleaner suction tube,
[0023] FIG. 2 is a perspective view of a part of an actuating
mechanism,
[0024] FIG. 3 is an embodiment of an end sleeve in a perspective
view,
[0025] FIG. 4 is the embodiment according to FIG. 3 with an
inserted part of the embodiment of the actuating mechanism
according to FIG. 2,
[0026] FIG. 5 is a sectional view of an embodiment of the vacuum
cleaner suction tube, and
[0027] FIGS. 6a to 6c are schematic representations of the
inventive method for manufacturing a vacuum cleaner suction
tube.
DETAILED DESCRIPTION OF THE INVENTION
[0028] FIG. 1 shows a schematic representation of an embodiment of
a vacuum cleaner suction tube 1. The vacuum cleaner suction tube 1
has an inner tube 2, an outer tube 3, an actuating mechanism 4 and
an end sleeve 5. An end sleeve recess 6 is formed in the end sleeve
5 and an outer tube recess 7 is formed in the outer tube 3. The
inner tube 2 has snap-in depressions 8 which allow the actuating
mechanism 4 to engage in the snap-in depressions 8 by means of a
locking device in order to block the relative displacement of inner
tube 2 and outer tube 3 to one another. The actuating mechanism 4
has a base plate 10 with two snap-in recesses 9 (not shown in FIG.
1) located inside the outer tube 3, wherein the remainder of the
actuating mechanism 4 passes through the outer tube recess 7. The
end sleeve 5 is inserted with its insertion end 11 into the outer
tube 3 in such a manner that only its outer end 12 emerges from the
outer tube 3. To prevent the end sleeve 5 from being inserted too
far into the outer tube 3, a stop 13 is provided at the outer end
12 of the end sleeve 5, which is formed by an enlargement of the
outer diameter D of the end sleeve.
[0029] The individual components interact in such a manner that
they fix one another. The base plate 10 of the actuating mechanism
is dimensioned so that it is larger than the outer tube recess 7,
so that the actuating mechanism 4 cannot be pushed out of the outer
tube 3 through the outer tube recess 7 from the inside. The end
sleeve recess 6 of the end sleeve 5 interacts with the base plate
10 of the actuating mechanism 4, so that an axial displacement of
the end sleeve 5 is blocked by the actuating mechanism 4. Finally,
the inner tube 2 prevents the actuating mechanism 4 from being
pushed into the outer tube 3 in the radial direction. All
components therefore hold one another.
[0030] FIG. 2 shows the base body 14 of the actuation mechanism 4,
comprising the base plate 10 and a mount 15 for the locking device
of the actuating mechanism 4. Two snap-in recesses 9 are formed in
the base plate 10, through which the locking device (not shown
here) can pass to engage the snap-in depressions 8 of the inner
tube 2. The base plate is adapted to the shape of the tube so that
the base plate has an arch 16.
[0031] FIG. 3 shows an embodiment of an end sleeve 5. Crosspieces
18 are formed on the inside 17 of the end sleeve 5, which serve to
stabilize the end sleeve 5. In addition, they reduce the bearing
surface of the inserted inner tube 2 in the end sleeve 5, which
additionally reduces friction. This makes it easier to move the
inner tube 2 within the end sleeve 5. The movement in the outer
tube 3 is correspondingly smoother, since the inner diameter of the
end sleeve 5 is smaller than the inner diameter of the outer tube 3
For the guidance of the inner tube 2 (not shown here), a tongue 19
is formed on the inside 17 of the end sleeve 5, which corresponds
with a groove formed on the inner tube 2. The tongue 19 is arranged
opposite the end sleeve recess 6.
[0032] In this embodiment, the end sleeve recess 6 is only a recess
in the material of the end sleeve 5 In addition, two smaller
recesses 20 are formed in the end sleeve recess. The two recesses
20 correspond to the two snap-in recesses 9 in the base plate 10. A
tapering cone-shaped region 21 is formed at the insertion end 11,
which begins at the end sleeve recess 6 and ends at the end of the
end sleeve 5 at the insertion end 11. The cone-shaped region 21 is
used to simplify the insertion of the end sleeve 5 into the outer
tube 3 when the actuating mechanism 4 is already arranged in the
outer tube 3. The actuating mechanism 4 can slide onto the
cone-shaped region 21 during insertion and does not already block
the path of the end sleeve 5 during insertion. In this embodiment,
the stop 13 is turned towards the insertion end 11. In this manner,
the stop 13 encloses the end of the outer tube 3 (not shown here)
when the end sleeve 5 is completely inserted into the outer tube
3.
[0033] FIG. 4 shows the base body 14 of the actuating mechanism
according to FIG. 2 which is inserted into the end sleeve recess 6
of the end sleeve 5 according to FIG. 3. In FIG. 4, it is easy to
see that the end sleeve recess 6 is designed to fit exactly onto
the base plate 10. Conversely, it becomes clear that the end sleeve
5 has no room for movement in the outer tube 3 (not shown here)
when the actuating mechanism 4 is already arranged in the outer
tube 3. Because the end sleeve recess 6 is only a depression with
two recesses 20, both the inward radial movement of the actuating
mechanism 4 and the outward radial movement of the actuating
mechanism 4 are blocked, provided that actuating mechanism 4 and
end sleeve 5 are arranged in their position in the outer tube 3.
FIG. 4 also shows that the cone-shaped region 21 simplifies the
insertion of the end sleeve 5 into the outer tube 3. The
cone-shaped region 21 serves as a ramp for the actuating mechanism
4. As the height increases, friction increases and moving the end
sleeve 5 further into the outer tube 3 becomes more difficult.
Without the cone-shaped region 21, it is only possible to move the
end sleeve 5 past the actuating mechanism 4 to a limited
extent.
[0034] FIG. 5 shows a sectional view of a vacuum cleaner suction
tube 1 in which all components, i.e. inner tube 2, outer tube 3,
actuating mechanism 4 and end sleeve 5 are connected to one
another. In this embodiment, the outer diameter of the area of the
inner tube 2 that is not intended to be inserted into the outer
tube 3 is increased. This way a simple stop 22 is implemented.
Likewise, both the outer and inner diameters of the outer tube 3
are enlarged in one section 23. The end sleeve 5 is arranged in
this section 23. In the further course of the outer tube 3, the
inner and outer diameters are slightly smaller than in section 23,
so that too great of a distance does not occur between inner tube 2
and outer tube 3, which could lead to unfavorable flow
characteristics during the suction process.
[0035] Finally, FIGS. 6a to 6b show a schematic representation of a
method for manufacturing a vacuum cleaner suction tube 1. In FIG.
6a, the actuating mechanism 4 is inserted into the outer tube 3 and
lead through the outer tube recess 7. Due to the larger base plate
10, the actuating mechanism 4 cannot be pushed out of the outer
tube 3 from the inside.
[0036] In FIG. 6b, the end sleeve 5 is inserted into the outer tube
3, wherein the actuating mechanism 4 is already arranged in the
outer tube. The end sleeve 5 must be guided past the base plate 10
of the actuating mechanism 4 during insertion. The only possibility
for the end sleeve 5 to be guided past the base plate 10 is a
slight elastic deformation, which is strongly exaggerated in FIG.
6b. The end sleeve 5 is inserted into the outer tube 3 until the
base plate 10 engages into the end sleeve recess 6.
[0037] FIG. 6c shows how the end sleeve 5 is already completely
arranged in the outer tube 3. The actuating mechanism 4 prevents
further movement of the end sleeve 5 into and out of the outer tube
3, in addition, the stop 13 blocks further movement into the outer
tube 3, and finally the inner tube 2 is inserted into the end
sleeve 5 and also the outer tube 3. The inner tube 2 prevents the
actuating mechanism 4 from being pushed or pulled inwards into the
outer tube 3. The individual components fix one another after
completion of the method.
* * * * *