AU682099B2 - Closure device with a closure cylinder actings at the same time as a push handle for actuating lock members - Google Patents

Abstract

A closure device has a closure cylinder that acts at the same time as a push handle for actuating lock members. The closure cylinder is radially subdivided into a circumferential cylinder guide and into a central cylinder core. The cylinder core may be moved by a key between a locked and an unlocked position of rotation, but when the key is removed the cylinder core is secured by holders to the cylinder guide in a fixed manner not only in the axial direction but also in the direction of rotation. An axial spring force that acts on the cylinder guide axially movable in the cylinder housing actuates the closure cylinder as a push handle. In order to create a reliable device that cannot be forced open, the push handle is made up of two axial sections, of which only the outer section is formed by the closure cylinder whose circumferential cylinder guide is mounted so as to rotate in the cylinder housing. The inner section is in turn radially subdivided into two parts and consists on the one hand of an axial central control bolt and on the other hand of a circumferential pressure bushing. The control bolt is secured to the driver against rotation and axial movements and is mounted in the pressure bushing in a rotary but axially fixed manner. In addition, the pressure bushing is guided in the cylinder housing so as to move in the axial direction but not to rotate. An axial coupling is arranged between the control bolt and the cylinder core and the spring-loaded pressure bushing is pressed by an axial lifting profile against the cylinder guide. When the outer section of the push handle is violently turned, the lifting profile makes the inner section of the push handle run freely in an overload state in which the closure cylinder can turn freely but ineffectively.

Description

Modified pages [Article 34] CLOSURE DEVICE WITH A CLOSURE CYLINDER AT THE SAME TIME AS A PUSH HANDLE FOR ACTUATING LOCK MEMBERS The present invention relates to a closure device of the type specified in the ckssifying section of Claim 1, whose closure cylinder has to fulfil two different functions. One of these functions comprises moving a cylinder core in a swivel-mounted cylinder guide between a locked and an unlocked position of rotation. The reversing movement of tne cylinder core is transferred to a driver which cooperates with the lock members only in the unlocked position of rotation, and not in the locked position of rotation. The second function of the closure cylinder comprises being a push handle which, in the manner of a push button, is pressed axially against resilience acting on it in a cylinder housing and then actuates a lock member when the abovementioned cylinder core is in the unlocked rotation position.

The known push handle, in accordance with FR 24 51 985 Al, consisted solely of the closure cylinder. Even though the cylinder guide could be rotated, it was secured against axial movement with the cylinder guide and the driver was secured against rotation and axial movement directly on the cylinder core to execute the rotational reversing actuated by the key and based on the cylinder core. The axial resilience forming the basis of the push button effect had a direct effect on the cylinder core of the lock member. The closure cylinder could in addition be displaced axially for the push button effect by means of its circumferential cylinder guide, but was also unable to rotate in a cylinder housing.

The closure cylinders acting as push handle of the known closure device were at risk of burglary. The guides and the tumblers located in the cylinder core could be damaged to such an extent by forceful turning of the cylinder core when a tool is used for breaking in that the closure cylinder could no longer be used. It was often the case that exchanging the damaged components of the device was not enough, rather a complete replacement was required.

With a closure device of the same type, where the closure cylinder is used as push handle for actuating lock members, as in DE 39 02 742 C2, the cylinder core is extended by a through shaft, to which is attached a pressure foot, With pressure actuation of the closure cylinder the axially displaced pressure foot swivels a transfer lever which then swivels a revolving bolt leading to the lock members, whenever the cylinder core is in the unlocked position. Here the attempt has been made to prevent munauthorised actuation of the closure device by obstructing means. These obstructing means comprised a ratchet which can rotate together with the pressure foot, which stopped the transfer lever in the locked position of the cylinder core. These obstructing means are arranged outside the cylinder housing wlich accormnodates the closure cylinder, where they require more space. When the cylinder core is turned forcefully by a tool used for breaking in, damage to the components in the vicinity of the closure cylinder may eventuate in this case, as already mentioned.

EP 0 143 087 Al discloses a closure device of the same type, where the push handle serving to actuate lock members comprises a single section only, namely a cylinder core to be operated by the key and a cylinder guide enclosing this. The longitudinal movement of the cylinder guide resulting from pushing is transferred by way of a pin to an annular body which cab be displaced longitudinally on the circumference of the fixed cylinder housing, which acts by way of a boss on lock members in the unlocked rotation position, whenever the push handle is actuated. In this case there is no guarantee against breaking in, With a closure device of another kind, as in DE 38 27 418, which does not correspond to the classifying section of Claim, the closure cylinder is not designed as a push handle which when actuated has an effect on the lock members. Instead, the lock members are actuated directly, by turning of a key inserted in the cylinder core. Both the cylinder core and its cylinder guide can be rotated in the fixed cylinder housing, but it cannot be mounted to move axially.

The turning of the cylinder core caused by the key is transferred by way of a sliding catch coupled axially thereto to a connecting sleeve secured against rotation, to which is solidly attached a revolving bolt associated with the lock members. Conveying these measures to devices of the type specified in the classifying section of Claim 1 cannot be inferred, especially because undesired reversing of the cylinder guide, not caused by the key, from a locked to an unlocked rotation position can be prevented.

The object of the present invention therefore is to develop a reliable and compact closure device of the type specified in the preamble of Claim 1, which is not at risk from attempts to force it open and which withstands forceful turning of its closure cylinder without damage to its components. This is accomplished according to the present invention by the features specified in the characterising section of Claim 1, which has the following special significance.

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In the invention the push handle consists of two axial sections, both of which are subdivided radially. The closure cylinder consequently forms the axial outer section of this new push handle and, compared to the known closure cylinders of this type which are aligned axially and indirectly, is freely swivel-mounted in the cylinder housing with its circumferential cylinder guide. The closure cylinder receives its unrotatable axial guide in the cylinder housing both directly, by means of the adjacent axial inner section of the push handle, and also by means of the pressure bushing there. This pressure bushing is under axial resilience and thereby exerts the restoring force necessary for actuation of the push button on the closure cylinder which is supported on a circumferential inner shoulder of the cylinder housing. The overload free running state originates from an axial lifting profile which is arranged between the cylinder guide on one side and the pressure bushing on the other side. When the closure cylinder is tun ed forcefully the latter can remain attached to the inner shoulder of the cylinder housing because the pressure bushing rises axially and cannot be rotated with it. This is ensured by the desired axial guide of the pressure bushling in the cylinder housing.

The inner section of the handle encloses in truly axial manner another control bolt which cooperates with the cylinder core by means of an interposed axial coupling. The control bolt can indeed be rotated, but is taken up against axial movement in the pressure bushing and along with its pressure bushing describes an axial movement opposite the cylinder core with an effective lifting profile, whereby the axial coupling lying therebetween disengages. Hereby the rotary reversing of the cylinder core can no longer have an effect on the control bolt coupled at the outlet side and have an effect on the driver. In the locked rotation position the driver is in an ineffective rotation position opposite the lock members, by means of which axial actuation of the combined push handle has no effect on the lock members. Forceful reversing of the driver into its unlocked rotation position cannot be achieved by forceful application on the closure cylinder because this movement cannot have an effect on the inner section of the handle. The axial spring serving as push button actuation of the handle thereby serves the further function of supplying the release force for the overload free running state of the lifting profile.

The labyrinth guide between the driver and the cylinder housing ensures that it is impossible to rotationally reverse the driver from the ineffective rotation position to the effective rotation position, where the lock members can be actuated by the push handle. This can be accomplished only by actuation of the key of the cylinder core. Only the cylinder core can effectively set the driver opposite the lock members by means of the control bolt coupled axially thereto. Application of force achieves nothing, because the driver is moved axially by means of the lifting profile brought into a free running state and in the labyrinth guide is held more reliably in its ineffective rotation position opposite the lock members.

Other features and advantages of the invention result from the other claims, the following description and the diagrams which represent the invention in simplified fashion in an embodiment.

Figure 1 shows an axial section through the most essential part of the device according to the present invention with the associated push handle filly extended whenever the components are in their normal rest position with the push handle in the extended position and are brought into a locked rotation position by actuation of the key, Figure 2 shows on an enlarged scale and in a developed view of the assembled is components a detailed section of the device along intersection II-II of Figure 1, Figure 3 shows the inner end view of the device of Figure 1, from which the intersection I-I for the axial section of Figure 1 is apparent, whereby the unlocked rotation position is also indicated by dashed lines, Figure 4 shows in uncut view an inner detail of the device of Figure 1 when the components are in their normal; rest position, Figure 5 shows an axial section tlhrough the device corresponding to Figure 1 when the components are in a forced position, but where the push handle is in a corresponding rotation position and extended position, Figure 6 shows this detail in a representation corresponding to Figure 4 when the components are in the forced position according to Figure Figure 7 shows a detailed section of the device corresponding to Figure 2 in the position visible from Figure 5 along the intersection VII-VII, Figure 8 shows the device again in a vertical section according to Figure 1 when the push handle is in its extended position ready to actuate the lock members and the components are brought into the unlocked rotation position shown in dashed lines in Figure 3, and N T

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-I Figure 9 shows another detailed section of the device in the extended position of the push handle visible in Figure 8 along the intersection IX-IX.

(The original [German] pages 5 to 11 of the specification follow) RFI;A- I Figure 3 shows an axial secuon through the device corresponding to Figure 1 when the components are in a forced position, but where the handle is in a corresponding rotation position and extend' position, Figure 6 shows this detail in a representation correspondin g'Figure 4 when the components are in the forced position acc rding to Figure Figure 7 shows a detailed section of the de e corresponding to Figure 2 in the position visible from Figu along the intersection VII-VII, Figure 8 shows the device ain in a vertical section according to Figure 1 when the pus andle is in its extended position ready to actuate the lock mbers and the components are brought into the unlocked rotation position shown in dashed lines in Figure 3, and igure 9 shows another detailed section of the device in the extended position of the push handle visible in Figure 8 along the intersection IX-IX.

In Figure 1 the closure device according to the present invention is illustrated on a boot lid 11 of a vehicle, which can be held in a closed position by means of lock members, not illustrated here. A push handle 20 helps to actuate the lock members and can be divided into two axial sections 21, 22 which overlap one another. Push handle 20 is accommodated in a cylinder housing 10 attached to flap 11, in which a helical compression spring 12 is situated.

Compression spring 12 encloses inner section 22 of push handle 20 and, inside cylinder housing is supported with its spnmg floor by means of a cup point 13 on a retaining ring 14 engaging in the inner wall of cylinder housing 10. Compression spring 12 exerts an axial resilient force illustrated by arrow 15 in Figure 1 on inner section 21 of push handle 20. Push handle 20 is compelled hereby to come out of cylinder housing 10 into its extended position illustrated in Figure 1, although according to Figure 8 it can be pushed in the direction of actuation arrow 23 into housing 10. With actuation 23, when the components are in an unlocked rotation position as in Figure 8, a driver should have an effect on the lock members by way of an operating ann 51, of which only one first link 53 is illustrated at 52.Outer section 21 of push handle 20 comprises a closure cylinder 30 subdivided radially in the usual manner, namely into a circumferential cylinder guide 31 and a truly axial cylinder core 32. Cylinder core 32 is secured against axial movement with cylinder guide 31, which is ensured by a retaining V4 -ring 33 in a circumferential groove of cylinder core 32 which is supported on the inner front -o 4F r I -I C_ position of Figure 1 or the retracted position of Figure 3 is in play. Rotation actuation of cylinder core 32 initiated by a key continues on driver 50 by way of axial coupling 40 and transfers its operating ann 51 between the abovementioned locked and unlocked rotation positions illustrated in Figure 3. Only in unlocked rotation position 51' according to Figure 3 s does the operating ann impact on one actuating ann of first link 53 designated in Figure 8 by 54 and describe pivoting movement 56 seen in Figure 8 with its opposite adjusting ann 55, The lock members are transferred to a release posi tin of boot flap 11.

Control bolt 42 is swivel-mounted in pressure bushing 41, though the inner end of cylinder core 32 engages freely pivotally in the interior of pressure bushing 41. Control bolt 42 is at the same time secured against axial movement with pressure bushing 41, which is ensured by a circumferential groove 43 in control bolt 42 and a radial inner cam 46 in pressure bushing 41.

Pressure bushing 41 is designed to move axially but not to rotate in cylinder housing An axial guide channel 48 inside cylinder housing 10 ensures this, in which a radial outer cam 47 situated on the circumference of pressure bushing 41 engages. The outer end of compression spring 12 engages in a circumferential annular groove 49 located in a widened end piece 29 of pressure bushing 41. Compression spring 12 is supported on the groove floor there.

Disposed between the front end of widened pressure bushing end piece 29 on one side and end flange 39 of cylinder guide 31 on the other side is a special lifting profile 60 best seen from Figures 4 and 6, comprising an axial profiled boss 61 on cylinder guide 31 and an axial recess 62 with counter profile on pressure bushing 41. Because pressure bushing 41 is under the axial resilience, indicated in Figure 4 also, of compression spring 12, recognisable from Figure 1, recess 62 tends to engage in boss 61. In the nonnrmal rest position this engagement position is present, as in Figure 4. Thlis is also retained when pressure actuation 23, as mentioned many times already, is applied, as in Figure 8, A defined rotation position of cylinder guide 31 in cylinder housing 10 is ensured byway of engaged lifting profile 60, because pressure bushing 41 is constantly maintained in a certain rotation position by means of its abovementioned guide means 47, 48. These relationships do change whenever, according to Figures 5 and 6, forceful turning 28 is applied to outer section 21 of push handle As illustrated in Figure 5, such force can be applied by a tool 58 used for breaking in, for example a screwdriver, which can be inserted into key channel 38 of cylinder core 32.

Cylinder guide 31 is rotated in cylinder housing 10 by tumblers 36 now engaging in detent i I -I lb channel 37 of cylinder guide 31 and lifts profiled boss 61 automatically out of recess 62 exhibiting a corresponding counter profile, as is best illustrated in Figure 6. Boss 61 has a trapezoid profile with approach bevels 63 on both sides and is lifted out of recess 62 by transition to this rotation position. Recess 62 effectively has flanks 64 with corresponding inclined counter position. Because in this case too, as shown in Figure 5, closure cylinder remains supported by its end flange 39 on inner stop lug 19, pressure bushing 41, in accordance with Figure 6, is pressed back axially against prevailing resilience 15 by a distance 65 according to the boss height With further forceful rotation of closure cylinder 30 pressure bushing 41 is supported with its front end surface 66 in an effectively level apex region of axial boss 61. Such a boss/recess pair 61, 62 is preferably provided in duplicate between cylinder guide 31 and pressure bushing 41, which is why recesses 62 travel a short distance into each other boss 61 with a forceful semi-rotation 28, but are lifted again automatically by their approach bevels 63 and inclined flanks 64 with full rotation. When closure cylinder 30 is rotated 28 forcefully, pressure bushing 41 only describes axial pivoting inside cylinder housing 10, without this being able to have an effect on a rotation displacement of driver When distance bushing 41 is pushed back, according to Figure 5 control bolt 42, which is attached thereto but secured against axial movement, is also repelled. Axial lifting 65 starting from lifting profile 60 is greater in size than engagement depth 59 between recess 44 and cam of axial coupling 40. Axial coupling 40 is lifted thereby, as in Figure 5, and consequently prevents transfer of forceful rotation 28 in outer section 21 of push handle 20 on inner section 22. Uncoupled control bolt 42 is not influenced by forceful rotation 28 and accordingly cannot displace driver 50 secured thereto against rotation. If the operating arm of driver 50 is in locked rotation position 50, pressure actuation 23 of push handle 20 cannot affect first link 53 in a fundamentally effective operating manner, as is apparent from Figure 3. In dthis case operating arm 51 lies in a radial plane offset by abovementioned angle opposite limiting operating arm 54 of lock first link 53. Pressure actuation 23 subsequently have no effect.

This situation can be altered only by appropriate key 17. In the manner already explained hereinabove rotational displacement of cylinder core 32 is made possible by means of inserted key 17, whereas cylinder guide 31 enclosing it is held unrotatably by pressure bushing 41 by means of engaged lifting profile 60. The rotational reversing of control bolt 42 is now transferred, by way of likewise engaged axial coupling 40 to the operating ann of driver which is then moved to rotation position 51' illustrated by dashed lines in Figure 3, as in L~ CI -~Ub~W Figure 8 also. With pressure actuation on push handle 20 operating arm 51' now contacts operating arm 54 of closure first link 53, as explained hereinabove, and accordingly has an effect on the lock members.

In the invention precautions are taken to ensure that, apart from the rest position of push handle 20 evident in Figure 1, rotational reversing of driver 50 is fundamentally impossible. This is assured by a labyrinth guide 70 disposed directly between cylinder housing on one side and driver 50 on the other side. As is best illustrated in Figures 5 and 8, driver has a cap shape. Cap interior 68 engages by means of an inner end piece 69 of cylinder housing 10. In the peripheral region of housing end piece 69 are provided two axial grooves 71, 72, in which a slide ring 57, located in hood interior 68 and evident in Figure 2, alternatively engages. Situated between both axial grooves 71, 72 is a cross member 73. With push handle in the rest position, as in Figures 1 and 2, slide ring 57 is located on the outer end of each axial groove 71 or 72, where there is a passage 74 in cross member. Passage 74 is an identical size to slide ring 57.

is With the components in the locked rotation position, as in Figures 1 and 2, slide ring 57 is situated in axial groove 71, where, by actuation 23 of handle 20, can describe an axial movement indicated in Figure 2 also by actuation arrow 23, which is ineffective for the lock members. The described key actuation of closure cylinder 30 is necessary to attain effective rotation position 51' of the operating arm according to Figures 3 and 8. Slide ring 57 is pivoted in the region of guide 70 corresponding with rotation displacement illustrated in Figure 3, which is also indicated in the level developed view of Figures 2 and 9 and reades position 57' in other axial groove 72 shown by dashed lines through passage 74. With pressure actuation 23 of push handle 20, as in Figure 8, slide ring 57' is then displaced in parallel axial groove 72 in the direction of movement arrow 23 visible in Figure 9, whereby operating arm 51' of driver 50 contacts operating arm 54 of closure first link 53, as in Figure 8. Pivot movement 56 of closure first link 53 then takes place.

Cross member 73 ensures separating of both axial grooves 71, 72 and is especially significant when locked rotation position 51 of the driver operating arm is present. When forceful turning 28, as in Figure 5, is applied to outer section 21 of push handle 20, the result is lateral overlapping 75 between cross member 73 on one side and slide ring 57 on the other, as seen in Figure 7, this on account of axial lifting 65 already mentioned in connection with Figure 6. Cross member 57 is then prevented from reversing in the direction of rotation arrow to 67 towards locked position 57'. This naturally applies only when a pressure movement of push handle 20 is described in the locked position of slide ring 57. In this case slide ring 57 describes a longitudinal displacement in its axial groove 71, while associated operating arm 51 is idle with respect to closure first link 53 and describes its ineffective axial movement in the offset angle plane of Figure 3.

Claims (2)

1. A closure device with a closure cylinder (30) acting simultaneously as push handle for actuating lock members (53) foi locking functions which can be executed particularly at the rear of vehicles, wherein the closure cylinder (30) is subdivided radially into a circumferential cylinder guide (31) and a truly axial cylinder core (32) which is secured against axial movement with the cylinder guide but which is swivel-mounted in the cylinder guide (31) and by means of a key (17) can be switched between an unlocked and a locked rotation position in the cylinder guide but which, when the key (17) is withdrawn, is locked with the cylinder guide (31) by means of tumblers wherein the cylinder core (31) transfers its control movement to a driver (50) cooperating with the lock members (53) in the unlocked rotation is position but not in the locked rotation position the cylinder guide (30) is pressed axially displaceably out of the cylinder housing (10) and by an axial resilience (15) against an inner stop but its projecting end can be pressed manually and axially against the resilience intc the cylinder housing (10) to actuate the lock members characterised in that the closure cylinder (30) forms only an axial outer section (21) of the push handle (20) whose circumferential cylinder guide (31) is received rotatably in the cylinder housing in that the outer section (21) continues axially in an inner section which in turn is subdivided radially, namely on one side into a truly axial control bolt secured against rotation an axial movement with the driver and on the other side into a circumferential pressure bushing (41) which supports the control bolt (42) rotatably, but secured against axial movement, is loaded by the axial resilience (15) and is guided in the cylinder housing (31) axially displaceably, but unrotatably, whereby the control bolt (42) is connected by means of an axial coupling (40) to the cylinder core and disposed between the spring-loaded pressure bushing (41) and the cylinder guide (31) is an axial outer profile (60) which converts the inner section (22) of the push handle (20) into an overload free running state with forceful turning (28) of the outer section (21) of the push handle and in that disposed between the driver (50) and the cylinder housing (10) is a labyrinth guide (70) wherein the labyrinth guide (70) permits a rotational reversing (67) actuated by a key of the driver (50) between the locked and the unlocked rotation position only in an unactuated ex .ded position of the push handle but which hinders during axial actuation (23) of the push handle

2. Device as claimed in Claim 1, characterised in that the labyrinth guide (70) comprises a slide ring (57) on the driver (50) or on the cylinder housing and two parallel axial grooves (71, 72) alternatively accommodating the slide ring (57, 57') on the cylinder housing (10) or on the driver, and both axial grooves (71, 72) are separated from one another at an angle distance corresponding to the reversing (67) of the driver (50) and on the other side exhibit between them at their outer grooved ends a passage (74) which allows the rotational reversing (67) of the slide ring (57, 57'). DECLARATION MENTIONED IN ARTICLE 19 DE 38 27 418 discloses a closure device of another kind which does not correspond to s the classifying section of Claim 1. The closure cylinder is not designed as a push handle which when actuated has an effect on the lock members. Instead, the lock members are actuated directly, by turning of a key inserted in the cylinder core. Both the cylinder core and its cylinder guide can be rotated in the fixed cylinder housing, but it cannot be mounted to move axially. The turning of the cylinder core caused by the key is transferred by way of a sliding catch coupled axially thereto to a connecting sleeve secured against rotation, to which is solidly attached a revolving bolt associated with the lock members. Conveying these measures to devices of the type specified in the classifying section of Claim 1 cannot be inferred, especially because undesired reversing of the cylinder guide, not caused by the key, from a locked to an unlocked rotation position can be prevented, FR 24 51 985 Al discloses a closure device of the kind specified in the classifying section of Claim 1. The closure cylinder has two distinct functions to fulfil, one of which is reversing the cylinder core between a locked and an unlocked rotation position by actuation of the key. The second function of the closure cylinder comprises working as a push handle which acts on the lock members when actuated only when the cylinder core is in the unlocked rotation position. This known device is liable to break in. When the cylinder core is rotated forcefully by means of a tool used for breaking in, the tumblers located in the cylinder core can be damaged to such an extent that the closure cylinder is no longer usable. With a closure device of the same type, where the closure cylinder is used as push handle for actuating lock members, as in DE 39 02 742 C2, the cylinder core is extended by a through shaft, to which is attached a pressure foot. With pressure actuation of the closure cylinder the axially displaced pressure foot swivels a transfer lever which then swivels a revolving bolt leading to the lock members, whenever the cylinder core is in the unlocked position. Here the attempt has been made to prevent unauthorised actuation of the closure device by obstructing means. These obstructing means comprised a ratchet which can rotate together with the pressure foot, which stopped the transfer lever in the locked position of the cylinder core. These obstructing means are arranged outside the cylinder housing which accommodates the closure cylinder, where they require more space. When the cylinder core is turned forcefully by a tool used for breaking in, damage to the components in the vicinity of the closure cylinder may eventuate in this case, as already mentioned. EP 0 143 087 Al discloses a closure device of the same type, where the push handle serving to actuate lock members comprises a single section only, namely a cylinder core to be operated by the key and a cylinder guide enclosing this. The longitudinal movement of the cylinder guide resulting from pushing is transferred by way of a pin to an annular body which cab be displaced longitudinally on the circumference of the fixed cylinder housing, which acts by way of a boss on lock members in the unlocked rotation position, whenever the push handle is actuated. In this case there is no guarantee against breaking in. -o O7 i i -II.