CZ273296A3 - Clamping device, particularly for automobiles - Google Patents

Abstract

The lock proposed has a cylinder made up of a sleeve and a core. The core is locked to the sleeve by means of tumblers when the key is withdrawn and carries one of the elements of a longitudinal two-element coupling. When the inserted key is turned, the cylinder core is rotated and this movement is transmitted to the other element of the two-element coupling which is non-rotatably linked to an engaging lug. It is the engaging lug which carries out the vehicle-locking function. Although the cylinder sleeve is rotatably mounted in a fixed housing, it is normally prevented from rotating in the housing by means of a catch which acts as an overload protection mechanism. The catch consists of a male and a female snap-in element on the cylinder sleeve, which are spring-biased with respect to each other and normally engage in each other along a longitudinal section and can be disengaged. When turned by force, the male catch element is disengaged out of the female catch element and the cylinder is brought into a freely turning overload condition within the housing. At the same time, the two coupling elements are detached from each other. So that the cylinder does not move longitudinally in the event of an overload, the invention proposes that the cylinder sleeve is mounted in the housing so that it cannot move longitudinally. While the male catch element of the overload protection mechanism cannot be rotated, it can be displaced along the longitudinal axis of the housing. The longitudinally acting spring bias acts on the male catch element in the direction towards the female catch element which cannot move longitudinally in the housing. The coupling element mounted on the cylinder core also cannot move longitudinally, but the other coupling element can move longitudinally together with the male catch element against the bias of the spring.

Description

Closure designed especially for cars

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device, in particular for an automobile with a shutter cylinder, which comprises a cylindrical guide and a cylindrical core for receiving a key. The cylindrical core is secured in the cylindrical guide by tumblers located on the springs when the key is pulled out and the second member is mounted in an axially engaged clutch member, the cylinder guide is blocked by the latch axial clutch. a device comprising at least one latch and having a support on the cylindrical guide. The pawl and the supporting rails are spring loaded and interlocking with each other, with the cylindrical guide engaging the housing in the case of forcible rotation and the axial pawl mechanism disengaged is possible only by the key but not by manipulation

3pojka. By establishing an axial connection and ensuring that the control of the shut-off function inserted into the core of the shut-off cylinder is a burglary tool. Although the burglary tool can be rotated by the cylindrical core, however, the cylindrical guide is not carried because the tumblers are not extended along the circumference of the cylindrical core. the ratchet mechanism ensures the operation of the cylinder in the housing without overloading in the housing. The latch and arm of this latch device automatically extend axially from each other and disconnect the axial connection between the cylindrical core and the carrier. Therefore, forcible rotation of the breech cylinder cannot result in rotation of the carrier. Overload protection prevents the shutter device from being damaged during violent burglary attempts. Therefore, the device can later be used again to provide a closing function in the car with the key.

BACKGROUND OF THE INVENTION A prior art of the type such as that of a sheath. Between

In the known shut-off devices of this device according to DE-OS 41 22 4 14, between the cylindrical guide and the guide located on the cylindrical guide, it is displaceable in the housing when using violence. In this axial displacement, the cylindrical core naturally also displaces axially, since it must always be axially stable when rotatably mounted in the cylindrical guide.

depending on whether the latch of the latch device is the rear end of the cylindrical guide, the device is moved with or without running inward. Due to the large, in many cases, latching devices of the burglary tool in engagement and forcibly rotating with the burglary tool, the tumblers can be cut off. In the end, unexpected closing functions can unexpectedly arise due to the burglary tool. In addition, the lock cylinder is damaged by cutting the tumblers and the device cannot be operated again with the key. This risk of breaking out can be reduced by a profile with very flat sides, functional problems.

for example, with a latch and a support axially disposed by a cylindrical axial spring.

Depending on the placed on the front or closing cylinder at known overload either axially out of the axial forces may remain in use but then arise

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide an affordable, compact closing device of the above-mentioned type in which the closing cylinder is not axially movable in the event of an overload. This is achieved by the measures according to the characterizing part of claim 1.

According to the invention, the cylindrical guide is mounted in the housing on a fixed axis, and therefore the support member formed thereon is also supported on the fixed axis. The latch associated with this latch assembly is not a fixed part of the housing, but a detachable part which can be moved axially in the housing. The housing consists of an axial guide in which the pawl is supported axially displaceably but non-rotatably. In this case, the axial guide acts axially on this separate latch and loads it also

3 to the aforementioned roller guide support formed in the housing on a fixed axis.

According to the invention, in the event of an overload, the cylindrical core also remains on the fixed axis in the housing, since the axial coupling member also is mounted in the cylindrical guide in a rotatable manner on the fixed guide. Therefore, it is associated with a cylindrical core on a fixed axis.

while the second axial coupling member coupled to the carrier is axially displaceable with the latch. Thus, when the latch is retracted against axial spring load in the event of an overload, the second axial clutch member is automatically released from the axial clutch member connected to the cylindrical core on a fixed axis. Thus, according to the invention, in the event of an overload, the closing cylinder does not perform any axial movement. The front face of the cylindrical core may always be flush with the shell.

Further measures and advantages of the invention are set forth in the other claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is further illustrated by the following drawings, in which:

1 shows an axial section through the first embodiment of the closure device according to the invention, schematically illustrated, in the normal case when the cylindrical core is controlled by the inserted key, FIG. 2 shows an axial section according to FIG. Fig. 3 is a cross-sectional view along the line III-III of Fig. 1 in a schematic view; Fig. 4 is a section parallel to and offset with respect to the cylinder axis along the line IV-IV of Fig. 3 in the case of Fig. 1; FIG. 5 is a sectional view corresponding to FIG. 4; FIG. 6 shows a further schematic section of the device along line VI-VI of FIG. 1; Fig. 2

giant. 8 axial section the apparatus of FIG in the area axial couplings v in the conventional case of FIG. 1, giant. 9 display corresponding equipment FIG in case of a fall overloading according to FIG. 2, giant. 1 0 and 1t e r to t external design latch apparatus in axial

Fig. 11 is an axial section corresponding to Fig. 1 in an alternative embodiment of the closure device according to the invention in the usual case; Fig. 13 is a region of the latching device in the conventional case according to Fig. 11 4 is a parallel sectional view analogous to FIG. 4, FIG. 14 of the latch assembly in the event of an overload of FIG.

DETAILED DESCRIPTION OF THE INVENTION

The closure device according to the invention shown in FIG.

1 to 9 can be mounted preferably in cars and comprises a stop cylinder which consists of a cylindrical conduit 2.0 and a cylindrical core 1.0 rotatably mounted therein. with fixed axis position. This bearing with a fixed axis position is provided by an inner collar 21 formed on a cylindrical guide 20, which is received in an annular groove 12.

on an axial pin 1.1 formed on the cylindrical core 10 in its extension for the key shown in FIG.

The cylindrical core 10 has an opening 8 for receiving the key 15 shown in FIG. 1, and the assembly of assemblies is located on the spring and best seen in FIG. 2. With the key 15 pulled out.

According to the drawing, the stoppers 14 are pushed radially outwardly and the springs engage in the closing channel of the exemplary embodiment, two closing channels 26 are formed which engage diametrically extending from the cylindrical core 10 and block the cylindrical core 10 in the cylindrical guide 20.

24. On the mutually opposed tumblers 14 shown, the ties 14 engage each other by insertion into 1. This is cylindrical

When the key 15 is inserted, the cylindrical core 10 is removed. as seen in FIG. 10, the core 10 is mounted rotatably in the cylindrical guide 20. When actuated by the key 15, rotation is transmitted via the axle clutch member 31 best seen in FIGS. 2 and 8 to the carrier 23. The driver 23 is transferred by means of a wrench 15 with a line in the sense of the operating positions 23 '. dot-dash. By rotating the pivoting, the desired closing from the rest position shown in Fig. 3 full of arrows 27 is performed. 27 'filming into one or more

3 ''. 3 which are shown in FIG. 3 in the direction of the arrows 27, 27 ' The axial clutch member 3 1 is mounted on the axial pin 11. thus, it is mounted non-rotatably, with a fixed axis position, on the cylindrical core 10. The carrier 23 is mounted with a fixed axis position relative to the axial pin 11 of the circlip 22.

1 and 4, it is fixed by means of the below described 3 that the axis of the axis is by means of said shaft 21 in the position of the axis of the cylindrical guide 20.

J® rigid casing

It is important

The cylindrical guide 20 is rotatable, but in conventional, in the rigid housing 15, the rotatable latch assembly 40 is rotatable.

that the connection of the annular groove 12 and the inner 16 is also positioned at a constant

Therefore, as shown in FIG. 1, the cylindrical core 10 has an expanding cylindrical head 17 and the housing 16 having an inner rim 18 of the housing 16. The cylinder head 17 still housed in the outer shell 16 may be adjacent the key region 15. 1 and 2, indicated by the dashed line 39.

In the first embodiment according to FIGS. 1 to 9, the axial coupling member 31 cooperates with the tightening ring to carry the second axial coupling member 32. The clamp is mounted on the axial pin 11 of the direction of the arrow 34. perceptible on

The tightening ring 33 is mounted

33, which ring 33 but axially displaceable. Unašeč 23.

2 and 5, longitudinally displaceable relative to the carrier 23 in the housing 16 in FIGS. 2 and 5, in this first example, it has the same axis position relative to the housing 16 and is located in front of the face of the housing 16. Said non-rotatably and axially displaceable connection between the tightening ring 33 and the carrier 23 is formed according to FIGS. 1 and 4 by an axial nose 3.5. formed on the tightening ring 33 and two axial projections 25 formed on the carrier 23. Between the two axial projections 25 of the carrier 23 an axial groove 28 is provided for guiding the nose 3.5. The elastic force 33 shown in FIG. This spring force is caused by a screw spring 5 l. which at the same time performs another function of the impulse spring. The inner end of the spring 51 bears with a fixed axis position in the region of the thrust pin 11. The screw spring 51 encircles the axial bolt 11 with its threads and is supported by its outer end on the clamping ring 33. The screw spring 51 has two essentially The arms 52 of the coil spring 51 parallel to each other, between which, as shown in FIG. 3, the two axial projections 25 of the carrier 23 are disposed. Both arms 5.2 also surround the axial bridge 19 on the housing 16. which is formed on the housing 16 between two opposing radial recesses 53. By means of the arms 52 adjacent the axial bridge 19, the carrier 23 is held in the position shown in FIG. The arms 52 of the coil spring 51 exert a tangential force on each other in the direction of the arrow 54 under the force of the axial projections 25 of the carrier 23, which ensures the resting position of the carrier 2.3 shown in FIG. 2 3 '' the two axial projections 2.5 of the arm 5 2 of the helical spring 51 against the force arrow 54 move to the end positions 5.2 ', 52.' 'shown in FIG. 3.

The latching device 40 serves as an overload protection of the cylindrical core 10 and the cylindrical conduit 20, which is explained later, and consists, as best seen in FIGS. 2 and 5, of a latch 41 and an armature 42 which are commonly interlocking. elements. The pawl 41 is formed by a free body in this case, as shown in FIG. The abutment 43 is formed by an indentation 43 on the inner two front spheres located 42 of the axial surface of the cylindrical guide 20.

The recess 43 is formed on both sides with the wide sides 44 as balls with a force of said cylindrical guide 20 whose axes but in the housing 16 is best seen in FIG. 4. Both axial springs press in the direction of the described support 42 it has a fixed position together with the cylindrical guide 20 rotatably mounted.

Both balls are spring loaded by means of a tightening ring 33. The graduation ring 33 of FIG. 9 from the offset circumferential zone 35 and the offset surface 37. Both balls run on the zones 35 and abut by means of n 3 on. In addition to the apparent from FIG.

Therefore, the shrinking assembly has, on the one hand, a planar radial offset spaced radial offset surfaces 37, which exert an axial spring load 51. The two balls are also axially displaceable by the longitudinal displacement of the clamping ring. As the 2 and S protrude both balls radially above 33 and engage in axial grooves 45, which are guided in a diagonal position on the inner surface but are not and 4 and show that the axial zone of the shroud 15 is thereby axially rotatable with a compression ring 33. FIG. 1, the balls are located in the same ring 33 as the axial coupling 30, but opposite the second axial coupling member 32 formed in the tightening ring 33, they are located radially outward. This is because the second axial member 32 of the axial coupling 3.9. it is recessed axially and is covered by the circumferential zone 35 of the described offset. This can be seen in Figures 8 and 9.

Normally, there are ratios seen in FIG. 1, where the cylindrical guide 20 is mounted non-rotatably in the ball housing by the action of the latching device 40. they are both

This is apparent from FIG. 4 in that they are mounted in said axial groove 45 and, on the other hand, are located in the axial recess 43. The cylindrical guide 20 and the latch 41 therefore usually rest on the housing 16. By means of a key 15 inserted into the cylindrical core 10, the tumbler 14 is provided. as already mentioned, it will be converted into the dashed line in FIG. Therefore, by means of a wrench 15 in the cylindrical axial pin, the tightening ring by means of the axial projection 25 of the carrier carrier 23.

In the position 14 'of tumbler 14 shown, the cylindrical core 10 can rotate the guide 20. This rotation is transmitted via the axial clutch 30 to 30 and the clamping ring 30 is carried by the rotary 23 and the axial nose 35

This, however, changes when unauthorized persons are carried out by means of a burglary tool 55, for example rotation by the cylindrical core 10. As the tumbler 14 has been pulled out of rotation by means of a screwdriver, the connection 10 and the cylindrical conduit 20 of FIG. 2 have been described violently. It is formed between the cylindrical core. The ball is pulled through the inclined cylindrical guide 20 and the cylindrical guide 20.

at a defined torque, the flank 44 from the axial recess 43 extends to the inner face 28. As has been several times 16 on the fixed axis, it is a retractable

Since the cylindrical guide is shown, the ring 33 of FIG. 5 is pushed back in the direction of the arrow 34 against the direction of the axial force of the spring 51 in the housing. The axial nose 3.5 formed on the clamping ring 33 is inserted into the axial groove by the two axial projections 25 of the carrier of the clamping ring 33 of the coupling 30, as seen at the longitudinal limit for the axial opening.

Fig. 2 also occurs

Although the axial coupling 30 positioned on the cylindrical core 10 remains axially stationary, however, in the sense of the aforementioned arrow 34, the corresponding second axle coupling member 32 formed on the side of the tightening ring 33 is shown in FIG. By means of the burglary tool 55, the cylindrical core 10, together with the cylindrical guide 20, is rotated in the housing 1S in the sense of the arrow 29 of the rotation of the burglary tool 55, but without this rotation causing the driver 2.3. In fact, the axial coupling 30 is disengaged and the cylindrical core 10 and the cylindrical guide 20 are in free running due to overload. The limit values at which the free running of the cylindrical core 10 and the cylindrical guide Z0 due to overloading occur in the latch device 40 are determined by the helical spring 51 together with the bevel of the inclined side 44. This limit value is determined such that the tumblers 14 of the cylindrical sleeve 10 engaging the closure channel 24 cannot be reliably damaged. The cylindrical core 10 and the cylindrical guide 20 are again operable by a key 15 after the unsuccessful burglary attempt has been completed. It is noteworthy that the axial position of the cylindrical core 10 and the cylindrical guide 2.0 in the housing 16 shown in FIGS. 39.

The tightening ring 33 is mounted only in its axial position according to FIG.

in the housing 16 rotatably coupled to a cylindrical displacement in the direction of FIG. 2, the shrink ring is a core 10. but already in the small case with the coupling shown in FIG. 8 and 9, as well as two radial ribs 48 on the inner surface of the housing 16. The axial protrusion 38 is normally located at a predetermined axial distance from the end of the radial rib. 48. However, if the longitudinal displacement of the tightening ring 3.3 seen in FIG. 2 occurs, the axial projection 3.3 will travel into the axial gap 49 between the two radial ribs 4.8, as best seen in FIG. 7. During displacement and thus also in the case of FIG. therefore, the clamping ring 33 is positioned by the housing 16. neotočně. However, this means that due to the non-rotatable connection of the axial projection 25

1 of the carrier 23 and the axial nose 35, the carrier 23 also remains non-rotatable in the housing 16. Thus, irrespective of the burglary tool 55, manipulations in the region of the carrier 23 are also unsuccessful.

As a further embodiment of FIG. 10, a modified embodiment of another latch member 40 'is shown. The same reference numerals as used in the first embodiment of FIGS. 1 to 9 are used to indicate the respective components. Within this range, the previous other latching device 40 'is formed 20 in the same way as the recess 43 with oblique. '.

description. Retainer 42 2 on the cylindrical guide flanks 44. Just do this other latch

The respective other pawl 41 is part of the ring body 46 shown in FIG. 10, which is housed in the housing 15 axially of two radial said axial pawls. The other pawl 41 is of the shape described by the axial pivot. The ring body 45 further comprises protrusions 47 which engage the two grooves 45 on the inner surface of the housing 16.

profiled and occupies a circuit that corresponds to the stock rail 4 2. The ring body 45 is disposed on 11 by which it is possible to freely rotate against the ring body 46 in the direction of the arrow 29 rotation of the burglary tool 55 shown in FIG. 2. In addition to the ring 46, the tightening ring 33 described e.g. design.

which further has an unwritten ball. The axial coupling 30 is similarly formed, i.e. between the Embodiment of the Embodiment, the ring 33.

as in the preceding example, however, it can also be used with the following devices, which will be described below, by means of the axial bolt 11 and the pulling-off Fig. 10.

Figures 11 to 14 show a third embodiment of a closure device according to the invention. They are also marked here

2 corresponding parts by the same reference in the previous embodiment, wherein the description. These figures correspond to the illustrations as well as 4 and 5 from describe the differences.

of the first exemplary embodiment

Axially different carrier 5.8 case also security when with description in case

tags as pays over dc ho z according to FIG. 1, 2 That's enough only

which force acts through the device 40 in this manner causes an analogously directed arrow 50 resilient to the latch pawl 41 formed as a ball, applying the violence of Fig. 12 to the first exemplary embodiment. In this case, the inner end of the coil spring 51 bears over the retaining ring 22 on the axial pin 11. while the outer end of the coil spring 51 acts on another carrier 58. The other carrier 58 is axially spaced and, like the clamping ring 33 in the first embodiment, has a radially spaced circumferential zone 5S of another carrier 58 shown in FIG. grooves 45 formed in the housing 16. they are located on the perimeter zone 56 and rest on the abutment surface 57.

Other axial clutch 3.0. ' It is formed similarly to the first pi in that it is shown in FIG

shape and functionally perform difference axial couplings 30 ' another unašeče 58. another unašeče 58, apparently FIG. 1 1,

from the radial ribs dashed part 58 has an axial projection 59 which is normally located as a defined axial distance formed on the interior of the housing 166. In the event of an overload according to FIG. into the free space between the two radial ribs 48 and causes the other carrier 58 to rotate in the housing 16. The arm 60 protruding from another carrier 58, which provides a shut-off function when passing into the case, is therefore the overload of FIG. 12 non-rotatable

3 fixed relative to the housing 16.

A further difference in the third embodiment according to FIGS. 11 to 14 is that the longitudinal displacement in the event of an overload of FIG.

However, this axial displacement in the direction of the arrow 34 of the arm 60 has no effect on the closing function, since in the event of an overload it is secured by the radial ribs 48 and the axial projection 59 of another carrier 53 that the other carrier 58 does not rotate. This axial displacement in the direction of the arrow 34 of the arm 60 is additionally utilized beyond to fit with the next lock component. However, according to FIG. 12, the other drive 58 in the direction of arrow 3.4 does not run longitudinally in the front of the apparatus of FIGS. 11-14. As can be seen, the cylindrical guide 20 and the cylindrical core 10 retained therein remain fixed. the axially fixed position shown in FIG.

corresponding to the black dash line 3.9.

Claims (5)

A locking device, in particular for automobiles, and a closing cylinder comprising a rolled guide (20) and a cylindrical core (10) for inserting a key (15), the cylindrical core (10) being secured in the cylindrical guide (20) by tumblers (14) disposed on the springs and is provided with an axial clutch member (31, 30, 30 '), the second axial clutch member (30, 30') being non-rotatably coupled to the carrier (23, 53) to perform the breech function in the automobile, the cylindrical guide (20) is mounted in the rigid casing (15) rotatably and is blocked by a latch device (40, 40 ') consisting of at least one latch (41, 41') and provided with a support on the cylindrical guide (20) (42) and the latch (41, 41 ') and the armature (42) are loaded with each other by a spring (51) and interlock. taking at I am flax turning to gray cylindrical guide (20) d o Coats (16) and is disconnected axial coupling (30 , 30 ' ) characterized with it. that cylindrical the line (20) is u1 o ž e n o in tires (16) rotatingly on solid Axle, latch (4 1 4 1 ') ratchet tract (40, 40 ') it is stored in the mantle ti (1 5) non-rotatable and axially displaceable, pawl (41, 41 'connected to spring (51) and support rail (42) formed on the cylindrical guide (20) is housed in a housing (15) on a fixed axis, axial coupling member (30, 30) 1) connected to the cylindrical core (10) is mounted in a cylindrical guide (20) on a fixed axis and the second axial coupling member (30, 30 ') connected to the carrier (23, 58) together with the pawl is axially displaceable against the spring (51). O 4.. Equipment according to Claim 1 characterized c í se t í m, that me from i spring (51) and latch (41 ) j and umis t ě n stáno v c c ring (33), which is o p and three others č l e n e m f 2 ' and x ·. and 1 η í couplings and is axially disposed in the housing (15). 1 5 The device according to the claim of the tightening ring (33) J is formed on the cylindrical number (31) of the axial coupling 2, characterized in that an axial bolt (11) of the core (10) for the non-rotatable closure (30) is mounted. that in which bonding Device according to claim 2 or 3, characterized in that the clamping ring (33) is mounted non-rotatably and axially displaceably on a carrier (23) which is rotatably mounted on the axial pin (11). Equipment according to at least one of claims 2 to 4, characterized by ž e downloadable ring United Kingdom (33) j e v and x i á1 η ί po bed connection to your faithfulness core (10) saved in tire (15) swivel, h and x i á! disconnection position í o d cylindrical ho core (10) is saved v p 1 (16) neotočně. Device according to at least one of Claims 2 to 5, characterized in that the pawl (41) of the pawl device (40) is mounted on the offset surface (37) of the shrink ring (33). 7. September September according to claim 1, characterized by tí m that Spring i na (51) is connection e to k z Grills (40) Help and another unašeče (58); e r ý je saved in tires (16) a x i á 1 No slidingly and n e s e Second Art e n (32 ’ ) other axial couplings (30 ') t 3. September September according to of claim 7 c i se tí m that v j i ném driver i (58) is c: eye axial č e p (i i 'vyt uo ř e n ý on cylindrical core (’0) at on this and x i á 1 n; m pin (1 ’) i 9 neotočně saved on solid axis member (3 n ji No axial SCO j ky (30 '). Apparatus according to claim 7 or 3, characterized in that the other carrier (53) is mounted rotatably in the housing (15) in the axial position of the attachment to the cylinder (10) and is detached from the cylindrical core (10) in the axial position. neotočně. axial position in the shell (16) Device according to at least one of Claims 1 to 9, characterized in that the support (42) is formed in the inner face (23) of the cylindrical guide (20) and after one or one recess (43) with laterally inclined sides (44). (41) is formed by at least one free body, which in the normal position is axially pushed by a tightening ring (33) or another carrier (58) into the recess (43) and which overhangs radially over the tightening ring (33) or another carrier (53) : fits into an axial groove (45) on the inner surface of the housing (15). Device according to claim 10, characterized in that the pawl (41) is formed by one ball. Equipment according to of claim 10 n or 11, characterized by m, ž a z a p a d k a \ ¹ / J 3 formed d ma me u u m i, fcterým are assigned dva vyhi about learning (4 3 ) in cylindrical section nor (20) and d a x i a ί η í d R and Z to Y : 4 5) in p 1 á š t (15). cř taking both h1 o learning (43) b ě axi á 1 D a r d es xy (45) leovem leadership (20) and p tire ( 16) can 100th n y diagonally. 1 7 3. Equipment according to at least one z n á r o k ú 10 to 12 characterized by loose bodies 'ace lies in common axial zone with -Return ring United Kingdom (33) a and x Clutch (30), v. D the other member (32) and x i á 1 η í Clutches (30) created in tightening ring United Kingdom (33) J s radially out oresazenc. Apparatus according to at least one of Claims 1 to 9, characterized in that the armature (42) of the other latching device (42). 4.0 ') is formed in the inner face (28) of the cylindrical guide (20) by at least one recess (43) having bevelled sides (44) on both sides, and another pawl (41') is formed by a ring (46) formed by a ring (46) which is mounted in the housing (15) axially displaceable and has at least one latching projection, the profi 1 of which corresponds to the recess (43). A device according to at least one of the preceding claims, characterized in that the spring (51 in the throat binding with the coupling clutch 30) and the latching means (40). The device according to claim spring (51) serves 15, characterized in that a rest position of the carrier (23) is defined as a pulse spring. that axial for angular Device according to claim 15 or 15, characterized in that the axial spring (50) is supported on a retaining ring (22) which is coaxially located on the axial bolt (11).