CLEANING DEVICE WITH DETACHING DEVICE

Abstract

A cleaning device having a handle extending along a longitudinal axis and a cleaning head. The cleaning head is in connection with the handle and is configured such that a cleaning pad is detachably fastenable to the cleaning head. The cleaning device further has a detaching device that is movably mounted to the handle and is configured to be moved along the longitudinal axis with respect to the handle from a cleaning position, in which a cleaning pad being fastened to the cleaning head remains fastened to the cleaning head, into a detaching position, in which a cleaning pad being fastened to the cleaning head is detached from the cleaning head.

Claims

1. A cleaning device comprising: a handle extending along a longitudinal axis; and a cleaning head, wherein the cleaning head is configured such that a cleaning pad is detachably fastenable to the cleaning head, wherein the cleaning device further comprises a detaching device, wherein the detaching device is movably mounted to the handle and is configured to be moved along the longitudinal axis with respect to the handle from a cleaning position, in which a cleaning pad being fastened to the cleaning head remains fastened to the cleaning head, into a detaching position, in which a cleaning pad being fastened to the cleaning head is detached from the cleaning head.

2. The cleaning device according to claim 1, wherein the detaching device comprises a rod extending along the longitudinal axis, wherein an ejector element is provided in the region of a distal end of the rod, and wherein the ejector element is configured to press against a cleaning pad being fastened to the cleaning head in order to detach the cleaning pad from the cleaning head when the detaching device is in the detaching position.

3. The cleaning device according to claim 2, wherein at least one of i) the ejector element has an uneven shape, ii) the ejector element has one or more surfaces which run at angle with respect to at least one of the longitudinal axis or a transverse axis running perpendicularly to the longitudinal axis, and iii) the ejector element is configured as one or more tips or corresponds to one or more needles or corresponds to one or more clamps or is serrated.

4. The cleaning device according to claim 2, wherein at least one of: a) the rod is movably mounted in the handle and is movable along the longitudinal axis (L) with respect to the handle from at least one of the cleaning position into the detaching position or from the detaching position into the cleaning position, or b) the ejector element is configured to be moved together with the rod with respect to the longitudinal axis, or the ejector element is configured to be moved separately from the rod with respect to the longitudinal axis.

5. The cleaning device according to claim 2, wherein the detaching device further comprises a tube extending along the longitudinal axis, wherein the tube is mounted in the handle, and wherein the rod is at least partially mounted in the tube and arc is configured to be moved along the longitudinal axis with respect to the tube.

6. The cleaning device according to claim 1, further comprising at least one actuation device, wherein the actuation device is operatively connected to the detaching device and is configured to transfer the detaching device from at least one of the cleaning position into the detaching position or from the detaching position into the cleaning position upon actuation.

7. The cleaning device according to claim 6, wherein the actuation device is mounted on the handle, and wherein at least one of: a) the actuation device is configured to be moved along the longitudinal axis with respect to the handle, whereby a movement of the actuation device results in a movement of the detaching device, b) the actuation device is configured to be pivoted with respect to the handle, whereby a pivoting of the actuation device results in a movement of the detaching device, or c) the actuation device is configured to be rotated about a rotation axis extending parallel to the longitudinal axis.

8. The cleaning device according to claim 6, wherein the detaching device further comprises at least one mounting element, wherein the mounting element is arranged in the handle and is in connection with the actuation device.

9. The cleaning device according to claim 1, wherein a length of the detaching device is at least 50% or at least 75% of a length of the handle with respect to the longitudinal axis.

10. The cleaning device according to claim 1, wherein the handle comprises at least one handle guiding element and the detaching device comprises at least one detaching guiding element, and wherein the handle guiding element and the detaching guiding element provide a guidance for the detaching device with respect to a movement of the detaching device along the longitudinal axis.

11. The cleaning device according to claim 10, wherein the detaching device is in connection with the actuation device via the detaching guiding element.

12. The cleaning device according to claim 1, further comprising at least one locking device, wherein the locking device is configured to adapt at least a locking position and an unlocking position, wherein the locking device in the locking position is configured to lock the detaching device in the cleaning position and to enable a transfer of the detaching device from the cleaning position into the detaching position in the unlocking position.

13. The cleaning device according to claim 12, wherein at least one of: i. the locking device is configured such, that the locking device is transferable from at least one of its locking position into its unlocking position and/or from its unlocking position into its locking position upon a rotation of the locking device around a rotation axis extending parallel to the longitudinal axis; ii. the locking device comprises a recess and a projection, and wherein the projection is receivable in the recess so as to form a stop preventing a movement of the detaching device along the longitudinal axis in the locking position; iii. the locking device comprises an inner thread and a corresponding outer thread, which threads are configured to enter a threaded connection with one another, and wherein the locking device is in its locking position when the threads are in the threaded connection; iv. the locking device is configured such, that it exerts a retaining force on the detaching device , in the absence of a force being applied on the detaching device by a user and being greater than the retaining force; v. the locking device comprises a retaining element acting on the detaching device so as to exert a retaining force on the detaching device.

14. The cleaning device according to claim 1, wherein at least one of: a) the cleaning head comprises at least one through opening extending through the cleaning head along the longitudinal axis, and wherein the detaching device extends at least partially through the through opening of the cleaning head when the detaching device is in the detaching position, or b) the cleaning head is mounted to the handle via a joint.

15. A method of manufacturing a cleaning device, the method comprising the steps of: Providing a handle extending along a longitudinal axis; and Providing a cleaning head, wherein the cleaning head is configured such that a cleaning pad is detachably fastenable to the cleaning head, wherein the method further comprises the step of: Providing a detaching device, wherein the detaching device is movably mounted to the handle and is configured to be moved along the longitudinal axis with respect to the handle from a cleaning position, in which a cleaning pad being fastened to the cleaning head remains fastened to the cleaning head, into a detaching position, in which a cleaning pad being fastened to the cleaning head is detached from the cleaning head.

16. The cleaning device according to claim 1, wherein the cleaning head is pivotally in connection with the handle.

17. The cleaning device according to claim 5, wherein also the ejector element is at least partially mounted in the tube and is configured to be moved along the longitudinal axis with respect to the tube.

18. The cleaning device according to claim 8, wherein a cross-section of the mounting element essentially corresponds to a cross-section of the handle.

19. The cleaning device according to claim 9, wherein at least one of: a) a length of the rod and a length the ejector element is at least 50% or at least 75% of a length of the handle with respect to the longitudinal axis, or b) the actuation device is arranged in a proximal region of the detaching device.

20. The cleaning device according to claim 11, wherein at least one of: a) at least one of the rod or the mounting element is in connection with the actuation device via the detaching guiding element, or b) the detaching guiding element corresponds to a bolt, pin, screw or the like that extends from the actuation device through the handle guiding element at least partially into the detaching device.

21. The cleaning device according to claim 13, wherein at least one of: a) the locking device is configured such, that the locking device is transferable from at least one of its locking position into its unlocking position or from its unlocking position into its locking position via a rotation of the actuation device around a rotation axis extending parallel to the longitudinal axis; b) the locking device is configured such, that it exerts a retaining force on at least one of the rod or the ejector element in the absence of a force being applied on the detaching device by a user and being greater than the retaining force; or c) the locking device comprises a retaining element acting on at least one of the rod or on the ejector element so as to exert a retaining force on at least one of the rod or on the ejector element, and wherein the retaining element is at least one of preloaded or corresponds to one or more projections extending into an interior of the handle.

22. The cleaning device according to claim 14, wherein the ejector element extends at least partially through the through opening of the cleaning head when the detaching device is in the detaching position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Preferred embodiments of the invention are described in the following with reference to the drawings, which are for the purpose of illustrating the present preferred embodiments of the invention and not for the purpose of limiting the same. In the drawings,

[0042] FIG. 1 shows a perspective view of a cleaning device comprising a handle, a cleaning head, and a detaching device in a cleaning position;

[0043] FIG. 2 shows an exploded view of the cleaning device according to FIG. 1;

[0044] FIG. 3 shows a sectional view of the cleaning device according to FIG. 1;

[0045] FIG. 4 shows a partial perspective view of the cleaning device according to FIG. 1 in a detaching position;

[0046] FIG. 5 shows a sectional view of the cleaning device according to FIG. 4;

[0047] FIG. 6 shows a perspective view of the cleaning device depicted in area A according to FIG. 1;

[0048] FIG. 7 shows an exploded view of the cleaning device depicted in area A according to FIG. 1;

[0049] FIG. 8 shows a an exploded sectional view of the cleaning device depicted in area A according to FIG. 1;

[0050] FIG. 9 shows a partial perspective view of the cleaning depicted in area A according to FIG. 1;

[0051] FIG. 10 shows a partial sectional view of the cleaning device depicted in area A according to FIG. 1;

[0052] FIG. 11 shows another partial sectional view of the cleaning device depicted in area A according to FIG. 1;

[0053] FIG. 12 shows an enlarged view of area C in FIG. 11;

[0054] FIG. 13a shows a sectional view of the cleaning device depicted in area B according to FIG. 1;

[0055] FIG. 13b shows another sectional view of the cleaning device depicted in area B according to FIG. 1;

[0056] FIG. 14a shows a side view of an ejector element of the detaching device according to another embodiment;

[0057] FIG. 14b shows a front view of the ejector element according to FIG. 14a;

[0058] FIG. 15a shows a side view of an ejector element of the detaching device according to another embodiment;

[0059] FIG. 15b shows a front view of the ejector element according to FIG. 15a;

[0060] FIG. 16a shows a side view of an ejector element of the detaching device according to another embodiment;

[0061] FIG. 16b shows a front view of the ejector element according to FIG. 16a.

DESCRIPTION OF PREFERRED EMBODIMENTS

[0062] Several aspects of a cleaning device 1 according to the invention are now discussed with reference to FIGS. 1 to 13b. The cleaning device 1 is configured for cleaning a floor or the like and can be referred to as a floor cleaning device. The cleaning device 1 comprises a handle 2 in the form of an elongate hollow bar extending along a longitudinal axis L. The handle 2 comprises a proximal end 21 and an opposed distal end 22. A cleaning head 3 is pivotally connected to the handle 2 at the distal end of the handle 2. The cleaning head 3 comprises fastening means such as Velcro fastening or the like (not depicted) that allow a releasable connection with corresponding fastening means on a cleaning pad (not depicted). Hence, the cleaning head 3 is configured such that a cleaning pad is detachably fastenable to the cleaning head 3. The cleaning pad is preferably a textile pad or a textile cloth.

[0063] The cleaning device 1 further comprises a detaching device 4 that is movably mounted to the handle 2 and is configured to be moved along the longitudinal axis L with respect to the handle 2 from a cleaning position, in which a cleaning pad being fastened to the cleaning head 3 remains fastened to the cleaning head 3, into a detaching position, in which a cleaning pad being fastened to the cleaning head 3 is detached from the cleaning head 3.

[0064] To this end an ejection direction E and a retraction direction R are defined. The ejection direction E extends from the proximal end 21 of the handle 2 towards the distal end 22 of the handle 2. The retraction direction R extends from the distal end 22 of the handle 2 towards the proximal end 21 of the handle 2. FIGS. 1 to 3 depict the cleaning device 1 in its cleaning position and FIGS. 4 to 5 depict the cleaning device 1 in its detaching position.

[0065] As best seen in FIG. 2 the detaching device 4 comprises a rod 5 extending along the longitudinal axis L and comprising a proximal end 8 and a distal end 7. The detaching device 4 furthermore comprises an ejector element 6 which is provided in a region of the distal end 7 of the rod 5. Here, the ejector element 6 and the rod 5 are provided as separate components, wherein the ejector element 6 is removably fastenable to the rod 5 via corresponding fastening elements 23, 24. As can be seen in FIG. 12, for example, the fastening elements can be provided by means of an outer thread 23 being arranged in a region of the proximal end 25 of the ejector element 6 and an inner thread 24 being arranged in region of the distal end 7 of the rod 5. Hence, the ejector element 6 and the rod 5 can be connected to one another via a threaded connection.

[0066] The rod 5 is movably mounted in the handle 2 and is movable along the longitudinal axis L with respect to the handle 2 from the cleaning position into the detaching position and from the detaching position into the cleaning position. In the present example the ejector element 6 is firmly connected to the rod 5 via the threaded connection 23, 24 and is thus moved concurrently and jointly with the rod 5 with respect to the handle 2 and along the longitudinal axis L.

[0067] The ejector element 6 is configured to press against a cleaning pad being fastened to the cleaning head 3 in order to detach the cleaning pad from the cleaning head 3 when the detaching device 4 is in the detaching position. To this end the ejector element 6, in particular a region of its distal end 26, has an uneven shape comprising several surfaces 9 which run at angle with respect to the longitudinal axis L as well as with respect to a transverse axis T running perpendicularly to the longitudinal axis L so as to form a conical tip 27. In fact, when the detaching device 4 is transferred from its cleaning position as depicted in FIGS. 1 to 3 into its detaching position as depicted in FIGS. 4 to 5, the conical tip 27 of the ejector element 6 will press against the cleaning pad and push the cleaning pad away from the cleaning head 3. Due to its shape the ejector element 6 results in a uniform detachment of the cleaning pad from the cleaning head 3. Various designs of the ejector element 6 are conceivable, examples of which will be discussed in greater detail with respect to FIGS. 14a to 16b.

[0068] As best seen in FIGS. 7 to 11 the cleaning head 3 comprises a rectangular plate 28 having an upper surface 29 facing the handle 2 and a lower surface 30 facing a floor in an application state of the cleaning device 1. A joint 19 is preferably arranged on the upper surface 29 of the cleaning head 3 and the lower surface 30 of the cleaning head 3 is preferably configured to allow an attachment of the cleaning pad. The cleaning head 3 is mounted to the handle 2 via the joint 19. The joint 19 corresponds here to a biaxial joint which allows a pivoting of the handle 2 about two axes. In particular, the biaxial joint 19 is configured such that the handle 2 can be pivoted with respect to the cleaning head 3 along a first pivoting axis P1 extending perpendicularly to the longitudinal axis L as well as along a second pivoting axis P2 extending perpendicularly to the longitudinal axis L and the first pivoting axis P1. The first pivoting axis P1 and the second pivoting axis P2 preferably span a plane that is parallel to a plane spanning the rectangular plate 28 of the cleaning head 3.

[0069] The cleaning head 3 comprises a through opening 18 extending through the cleaning head 3 along the longitudinal axis L, and wherein the detaching device 4, in particular the ejector element 6, extends at least partially through the through opening 18 of the cleaning head 3 when the detaching device 4 is in the detaching position. In order to allow a movement of the detaching device 4 through the cleaning head 3 also the joint 19 comprises a through opening 20 extending along the longitudinal axis L. To this end the through opening 20 of the joint 19 and the through opening 18 of the cleaning head 3 are arranged above one another with respect to the longitudinal axis L. In other words, a (fictitious) line extending through the through opening 20 of the joint 19 coincides with a (fictitious) line extending through the through opening 18 of the cleaning head 3. Moreover, the through opening 20 of the joint 19 and the through opening 18 of the cleaning head 3 are arranged centrally with respect to the joint 19 and the cleaning head 3, respectively. A distal end 31 of the joint 19 is attached to the cleaning head 3 via a snap-connection, wherein here two protrusions 33 of the joint 19 are snapped into corresponding recesses 34 provided in the cleaning head 3. A connection between the joint 19 and the handle 2 is achieved here via a proximal end 32 of the joint 19 that is attached to the distal end 22 of the handle 2. In particular, the proximal end 32 of the joint 19 is inserted into the distal end 22 of the handle 2, and wherein an attachment between the joint and the handle 2 is achieved by a friction fit as well as a snap connection established between a protruding nose 35 provided on the joint 19 and a corresponding recess 36 provided in the handle 2.

[0070] In order to enable an unobstructed cleaning by the cleaning device 1 the detaching device shall remain in its cleaning position during a cleaning operation. To this end the cleaning device 1 further comprises at least one locking device 15, which is configured to adapt at least a locking position and an unlocking position. In the locking position the locking device 15 is configured to lock the detaching device 4 in the cleaning position, wherein the ejector element 6 is mounted within the handle 2. In the unlocking position the locking device 15 allows a transfer of the detaching device 4 from the cleaning position into the detaching position. As follows from FIG. 12 the locking device 15 is configured such that it exerts a retaining force on the detaching device 4, here on the ejector element 6, in the absence of a force being applied on the detaching device 4 by a user and being greater than the retaining force. In particular, the locking device 15 comprises a preloaded retaining element 16 in the form of an elastic and/or pretensioned lug which protrudes inwardly into an interior 17 of the handle 2 and which provides an abutment surface 37 for the ejector element 6. In the absence of a force exerted by a user said lug 16 is capable of maintaining the detachment device 4 in the cleaning position. In order to transfer the detaching device 4 into its detaching position a user has to exert a force on the detaching device 4, e.g. by pushing the detaching device 4 downwards along the ejection direction E. If said pushing force is larger than the retaining force exerted by the lug 16 the lug 16 is pressed by the ejector element 6 radially outward, i.e. it deflects along a radial direction O, and the detaching device 4 can be moved along the longitudinal axis. As indicated in FIG. 12 the radial direction O runs perpendicularly to the longitudinal axis L.

[0071] In order to move the detaching device 4 along the handle 2 from the detaching position into the cleaning position and vice versa the cleaning device 1 further comprises an actuation device 10. The actuation device 10 is operatively connected to the detaching device 4 and is configured to transfer the detaching device 4 from the cleaning position into the detaching position and/or from the detaching position into the cleaning position upon its actuation. As follows from FIGS. 1 to 3, for example, the actuation device 10 is mounted on the handle 2, in particular on an outer surface 38 of the handle 2, and has the form of a sleeve that surrounds an entire circumference of the handle 2. To this end the actuation device 10 is movable along the longitudinal axis L as well as rotatable about a rotation axis A. The rotation axis A extends parallel to the longitudinal axis L. Because of its operational connection with the detaching device 4 a movement of the actuation device 10 along the longitudinal axis L is transferred into a movement of the detaching device 4 along the longitudinal axis L. Likewise, a rotation of the actuation device 10 about the rotation axis A is transferred into a rotation of the detaching device 4 about the rotation axis A. A user can actuate the actuation device 10 by grasping the actuation device 10 and moving it along the handle 2 with respect to the longitudinal axis L and/or by rotating it about the rotation axis A.

[0072] As indicated in FIG. 3 a length ld of the detaching device 4, in particular a total length being comprised of a length lr of the rod 5 and a length le of the ejector element 6, is at least 50 of a length lh of the handle 2 with respect to the longitudinal axis L. Furthermore, the actuation device 10 is arranged in a proximal region 12 of the detaching device 4, in particular in a region of the proximal end 8 of the rod 5. Consequently, the actuation device 10 is arranged in an upper region of the handle 2 and can be actuated easily by a user.

[0073] As best seen in FIGS. 13a and 13b, the detaching device 4 further comprises a mounting element 11, which corresponds here to a block of an essentially cylindrical shape, and which is movably mounted within the handle 2. The mounting element 11 is in connection with the actuation device 10 such that a movement of the actuation device 10, e.g. a rotation about or a displacement along the longitudinal axis L is transferred onto the mounting element 11. An external cross-section cm of the mounting element 11 preferably essentially corresponds to an internal cross-section ch of the handle 2. The internal cross-section ch can also be referred to as the clear width of the handle 2. By providing a mounting element 11 with a cross-section cm that essentially corresponds to a cross-section ch of the handle 2 a tilting of the mounting element 11 with respect to the handle 2 can be prevented. Because the rod 5 is connected to the mounting element 11 a tilting of the rod 5 with respect to the handle 2 is thereby prevented as well.

[0074] The mounting element 11 comprises here two bores, a first bore 39 extending along the longitudinal axis L and extending from a distal end 42 of the mounting element 11 partially towards a proximal end 41 of the mounting element 11, and a second bore 40 extending perpendicularly to the first bore 39, i.e. along the transverse axis T. The rod 5 of the detaching device 4 is mounted to the mounting element 11 via its first bore 39. More specifically, a region 12 of the proximal end 8 of the rod 5 is inserted into the first bore 39 and is connected to the first bore 39 by means of a press-fit and/or a form fit and/or a frictional fit. The second bore 40 is used for connecting the mounting element 11 with the actuation device 10. Said connection is achieved via a screw 14 that extends from the actuation device 10 through the handle 2, through the rod 5 and essentially through the second bore 40 of the mounting element 11. To this end the screw 14 extends through a slot 13 running along the longitudinal axis L of the handle 2, see FIGS. 1 and 2. Hence, if the actuation device 10 and thereby also the detaching device 4 is moved along the longitudinal axis L the screw 14 will slide within as well as along the slot 13, and wherein a rotation of the detaching device 4 with respect to the handle 2 is prevented. As a result an axial guidance is provided. The slot 13 can thus also be referred to as a handle 2 guiding element 13 and the screw 14 can be referred to as a detaching guiding element 14.

[0075] As mentioned earlier, various designs of the ejector element 6 are conceivable. For instance, and as follows from FIGS. 14a and 14b, a region of the distal end 26 of the ejector element 6 can comprise a first conical element 43 followed by a second element 44 terminating in an acute tip 27, i.e. in a tip 27 that defines an acute angle α. A proximal end 45 of the first conical element 43 is in connection with the outer thread 23 via which the ejector element 6 can be removably fastened to the inner thread 24 of the rod 5. Said proximal end 45 of the first conical element 43 furthermore comprises an undercut 46 having a diameter du that matches a diameter of the rod. In the depicted example, outer surfaces 47 of the first conical element 43 run inwardly towards the longitudinal axis L run at an angle of 60° with respect to one another. Also the outer surfaces of the second element run inwardly towards the longitudinal axis and run at an angle β of 60° with respect to one another. A length lc1 of the first conical element is 4 mm. A length lc2 of the second element 44 is 1.5 mm and a diameter of the second element is 1 mm. Furthermore, a diameter du of the undercut is 7 mm, a diameter dt of the outer thread is 5 mm, and a length lt of the outer thread is 6.5 mm, respectively.

[0076] FIGS. 15a and 15b as well as FIGS. 16a and 16b depict further conceivable examples of conceivable designs. In fact, the region of the distal end 26 of the ejector element 6 according to FIGS. 15a and 15b comprises a conical element 43 that terminates in a plurality of acute tips 27. Said tips 27 are arranged next to one another and provide a serrated distal end face of the ejector element 6. Like in the embodiment of FIGS. 14a and 14b, the proximal end 45 of the conical element 43 is in connection with the outer thread 23 via which the ejector element 6 can be removably fastened to the inner thread 24 of the rod 5. Also in this case said proximal end 45 of the conical element furthermore comprises an undercut 46 having a diameter du that matches a diameter of the rod. Furthermore, the outer surfaces 47 of the conical element run inwardly towards the longitudinal axis L and at an angle β of 60° with respect to one another. Moreover, the outer surfaces 48 of each tip 27 run inwardly towards the longitudinal axis L and at an acute angle α, here at an angle α of 60° with respect to one another. A length lc of the conical element 43 is here about 3.5 mm and a lateral distance d between neighbouring tips 27 is 1 mm. Furthermore, a diameter du of the undercut is 7 mm, a diameter dt of the outer thread is 5 mm, and a length lt of the outer thread 23 is about 6.5 mm.

[0077] FIGS. 16a and 16b depict another conceivable example of a region of the distal end 26 of the ejector element 6, which corresponds here to an essentially conical element 43 terminating in notches or grooves 49. Like in the previous examples, the surfaces 48 defining the notch or groove 49 define an acute angle α with respect to one another, which is in the present case 90°. In contrast to the previous examples, here said surfaces 48 defining the notch or groove 49 run from the longitudinal axis L toward the distal end 26 of the tips 27 outwardly. Also in this case the proximal end 45 of the conical element 43 is in connection with the outer thread 23 via which the ejector element 6 can be removably fastened to the inner thread 24 of the rod 5. Likewise, said proximal end 45 of the conical element furthermore comprises an undercut 46 having a diameter du that matches a diameter of the rod. Moreover, a length lc of the conical element 43 is here about 4 mm, a diameter du of the undercut is 7 mm, a diameter dt of the outer thread is 5 mm, and a length It of the outer thread 23 is about 6.5 mm.

TABLE-US-00001 LIST OF REFERENCE SIGNS  1 cleaning device  2 handle  3 cleaning head  4 detaching device  5 rod  6 ejector element  7 distal end  8 proximal end  9 surface 10 actuation device 11 mounting element 12 proximal region 13 handle guiding element 14 detaching guiding element 15 locking device 16 retaining element 17 interior 18 through opening 19 joint 20 through opening 21 proximal end 22 distal end 23 fastening element 24 fastening element 25 proximal end 26 distal end 27 tip 28 plate 29 upper surface 30 lower surface 31 distal end 32 proximal end 33 protrusion 34 recess 35 nose 36 recess 37 abutment surface 38 outer surface 39 bore 40 bore 41 proximal end 42 distal end 43 conical element 44 conical element 45 proximal end 46 undercut 47 outer surface 48 outer surface 49 groove or notch L longitudinal axis T transverse axis A rotation axis O radial direction E ejection direction R retraction direction P1 pivoting axis P2 pivoting axis cm cross-section ch cross-section lh length handle le length ejector element lr length rod lc length conical element lc1 length conical element lc2 length conical element lt length thread d distance α angle β angle du diameter dt diameter