Lock with code finding function

Abstract

The invention relates to a closure with adjusting bushings (3) arranged axially one behind the other, which are coupled to number wheels (2) and can be decoupled therefrom by means of a first control device (11, 18, 20) to change an opening combination. The adjusting bushings have code-finding elements (7) which interact with the adjusting bushings (3) in the combination-finding process in such a way that, when one of the number wheels (2) is rotated, the reaching of the release position of the associated adjusting bushing (3) can be sensed, in particular felt, wherein the combination-finding elements (7) are cams which interact with recesses (8) in the adjusting bushing (3) and, when spring-loaded, engage in the recess (8) when the release position of the adjusting bushing (3) is reached, wherein the adjusting bushings (3) can be brought into the combination-finding position by a displacement of the coding cam (11) in the direction of a bearing axis (37) which supports the adjusting bushings (3).in which at least the side wall (3') of an adjusting bush (3) rests against a combination finding element (7) under spring force.,

Description

field of technology

[0001] The invention relates to a closure with adjusting bushings arranged axially one behind the other, which are coupled to number wheels and can be uncoupled therefrom to change an opening code, which can be brought into a release position by turning the number wheels into an opening code position, in which release position a blocking element moves out of the path of movement of a locking head arranged on an actuating handle, so that the actuating handle, which is otherwise held in a blocking position by the blocking element lying in the path of movement of the locking head, can be brought from the blocking position into an open position, wherein the actuating handle can be brought into a code finding position in order to turn the number wheels coupled to the adjusting bushings into their opening code position, with code finding elements which interact with the adjusting bushings in the code finding position in such a way that when one of the number wheels is turned, the reaching of the release position of the associated adjusting bushing can be sensed. State of the art

[0002] A lock that can be used in particular as a cabinet lock is described in EP 2 419 586 B1. The lock has a rotating handle with multiple control cam arrangements. The lock has a combination lock arrangement that has four number wheels, each coupled to adjusting bushings, which are mounted on a bearing spindle. The number wheels can be uncoupled from the adjusting bushings in order to change the rotational position of the number wheels relative to the adjusting bushing. This allows an opening code position to be set. In the coupled state, the adjusting bushings can be moved into a release position by turning the number wheels to the opening code position. In the release position, touch elements of a tumbler engage in pockets of the adjusting bushings, so that a blocking element moves out of the path of movement of a locking head arranged on the operating handle. The operating handle can then be moved into an open position.In this lock, the guard also functions as a reset element, rotating the number wheels from their opening code position to a neutral position when the operating handle is moved. This occurs when the rotating handle is turned from the open position to the closed position, so that the opening code is obscured in the closed position. The guard also enables a code-finding function. For this purpose, arms of the guard engage the heart-shaped cams of the adjusting bushings to rotate them to their release position.

[0003] DE 20 2013 004 044 U1 describes a lock in which, in the unlocked position, the number wheels are decoupled from the setting bushings. Immediately after decoupled, a zero reset can be performed, thus obliterating the code.

[0004] DE 10 2009 057 188 A1 describes a lock in which, in a code-finding position, the retrieval of a lost key is possible by generating sensory responses. A locking arm of a locking device is to be moved into an active position by key operation, which makes the correct rotational position of a gearwheel detectable by touch. Summary of the invention

[0005] The invention is based on the object of further developing the code finding function on a closure in a manner that is advantageous for use.

[0006] The problem is solved by the invention specified in the claims.

[0007] In a first variant of a closure according to the invention, when the operating handle is moved from the locked position to the open position, the adjusting bushings are first uncoupled from the number wheels. This occurs when the adjusting bushings are in their release position, i.e., with the number wheels in their opening code position. When the adjusting bushings are uncoupled from the number wheels, the adjusting bushings are held in their release position. The number wheels are then returned to the neutral position with the aid of the reset element, for example, to a position in which the number code 0000 is set. This not only obscures the opening code, but also completely deletes the opening code, since the number wheels have lost their individual rotary coupling position to the respectively assigned adjusting bushing.The closure has a specially designed control device, which is designed such that when the actuating handle is moved from the locked position to the open position, the adjusting bushings are decoupled from the number wheels. However, the adjusting bushings are held in their release position. Resetting can be achieved in the known manner by a reset element of the reset member engaging reset control cams of the number wheels. The reset member is controlled by a second control device when the actuating handle is actuated. The second control device can have reset cams. Advantageous developments of the closure according to the invention are described below:

[0008] The control bushings are decoupled from the number wheels using a coding cam. The control bushings can be arranged axially one behind the other in contact. Each control bushing can have a bearing hub on which a number wheel is mounted for axial movement. Eccentrically arranged coupling pins extending axially from the number wheel can engage in coupling openings in the control bushing. The row of axially arranged control bushings is acted upon on one side by a first spring element. The coding cam arranged on the other side of the row interacts with a first control cam arrangement of the actuating handle.By moving, in particular turning, the operating handle, the coding cam can be moved axially relative to the bearing axis of the adjusting bushings from a normal operating position, in which the adjusting bushings are coupled to the number wheels, to a coding position in which the adjusting bushings are separated from the number wheels. Due to the spring force applied, the adjusting bushings follow the axial displacement of the coding cam from the normal operating position to the coding position. In the coding position, the coding cam can lie in a coding recess in the control cam arrangement. It can perform a stop function by interacting with a first stop on the operating handle, so that, starting from the open position, the latter can only be turned towards the locked position. When the lock is in the open position, the number wheels can be turned. By turning the number wheels in the open position, an opening code is set.However, since the number wheels are not coupled to the setting bushings in the open position, the opening code is not yet stored. The opening code is only stored when the operating handle is turned. Turning the operating handle from the open position to the locked position causes the coding cam to slide along a first control bevel, which controls the coding cam from the coding position to the normal operating position, so that the setting bushings are coupled to the number wheels. In this state, the opening code previously set by turning the number wheels is stored. The coding cam then runs along a control flank section and is held in its normal operating position when the lock is in the locked position. While the operating handle is moved from the open position to the locked position, the setting bushings initially remain in their release position.-The locking element of the guard lock is therefore initially located outside the movement path of the locking head. At the beginning of the rotation, the third spring element, which holds the guard lock in its release position, is released. This occurs simultaneously with the control arm of the return element running onto the control flank. Because the spring force is no longer applied, the guard lock takes on an undefined position. It can therefore also fall into its locked position. To ensure that it can still pass the locking head, the locking head is spring-loaded and has a run-up slope against which the locking arm of the guard lock can strike. During the rotation of the actuating handle, a second cam arrangement comes into effect to rotate the number wheels together with the adjusting bushings coupled to them with the help of the return element.

[0009] As soon as the locking element has overrun the bolt head, a second control cam arrangement comes into effect to rotate the number wheels together with the coupled adjusting bushings with the aid of the return element. The set code is thus erased. In a preferred embodiment, the operating handle is a rotary knob, which can have a control body that can be displaced in the axial direction. The control body has the shape of a cylindrical ring and is displaceable in the axial direction on a central body of the operating handle. It is acted upon in the axial direction by a second spring element. The control body is assigned to the operating handle, which is designed as a rotary knob, in a rotationally fixed manner. A swivel bolt can be attached to the shaft of the rotary knob, which interacts with a striking plate, so that the lock can be used as a cabinet lock.The housing, which contains the operating handle and a coding device, can be attached to the door leaf of a cabinet. The swivel bolt can interact with a striking plate attached to the cabinet body. The operating handle can only be opened in the locked position using number wheels set to the opening code. Otherwise, the locking element of the tumbler lies in the path of movement of the bolt head. To move the lock from its locked position to the open position, the opening code must first be set in the coding device by turning the number wheels. In this rotational position, touch elements of the tumbler, which is particularly designed as a rocker, can each enter a pocket in the adjusting sleeve, so that the tumbler, acted upon by a third spring element, assumes its release position. The locking element, which is permanently attached to the tumbler, then exits the path of movement of the bolt head.If the operating handle is now turned, the coding cam slides along a second control bevel, which slightly displaces the coding cam, which is held on a cylindrical surface section of the control body, radially inwards relative to the axis of rotation of the operating handle, which is designed as a rotary knob. This causes the coding cam to enter the sphere of influence of a third control bevel, which, upon further rotation of the rotary knob, slides along the coding cam in such a way that the control body is displaced in the axial direction, allowing the coding cam to enter an escape space in the control body. This results in an axial displacement of the coding cam from the normal operating position to the coding position. The setting bushings are now decoupled from their assigned number wheels, but remain in the release position.In the final phase of the rotary movement of the actuating handle, designed as a rotary knob, from the locked position to the open position, the coding cam overruns an edge of the aforementioned first control bevel, which is assigned to the coding recess, so that the control body can move back to its starting position, in which the coding cam now rests in the coding recess. In a phase of rotary actuation of the actuating handle after the coding cam has been moved from the normal operating position to the coding position, a second control cam arrangement comes into effect, which moves the reset element from its inoperative position to its operative position. The reset elements of the reset element now engage the control cams of the number wheels, which are separated from the adjusting bushings, in order to move the number wheels to the neutral position. The opening code is then erased.If the lock is to be returned to the locked position, an opening code must first be entered. This new opening code can be freely selected. If no new opening code is set, the lock can also be locked in the neutral position and then opened again.

[0010] The invention relates to a further development of a code-finding function. If a lock in the locked position can no longer be opened because the opening code has been forgotten, the lock can be moved into a code-finding position. This is preferably done with the aid of a cylinder lock assigned to the operating handle, which can only be operated with a matching key. In the code-finding position, code-finding elements interact with the setting bushings. This preferably occurs when the setting bushings touch the code-finding elements. This preferably involves force-applied contact between at least one code-finding element and an assigned setting bushing. The release position can then be reached by turning this setting bushing. The setting bushing is rotated by turning the number wheel coupled to it.In a preferred embodiment, the code-finding elements are formed by cams, each of which interacts with a recess in an adjusting bushing. The cams can rest against an outer circumferential surface section of the adjusting bushing under spring load. This outer circumferential surface section forms the recess into which the cam can enter when the release position of the associated adjusting bushing is reached. A noticeable engagement then occurs. In a preferred embodiment, the outer circumferential surface is a broad side surface of a radially enlarged section of the adjusting bushing. This is a wheel-shaped section of the adjusting bushing that projects radially outwards. This section has a side wall that lies in contact with the code-finding element. The adjusting bushings are preferably arranged axially one behind the other in a row, with hub sections of the adjusting bushings touching one another.A row of adjusting bushings is loaded on one side in the axial direction by a spring element. On the opposite side of the row is the coding cam, which is loaded in the axial direction by the spring element via the adjusting bushings and can therefore slide along the above-mentioned control curves under the influence of force. The axial distance between the code-finding elements is different from the axial distance between the width side surfaces of the mutually supported adjusting bushings, i.e. different from the axial length of an adjusting bush. Preferably, the axial distance between the active surfaces of the code-finding elements acting on the side walls of the adjusting bushing is smaller, in particular 0.2 mm smaller than the axial length of an adjusting bush. In order to bring the lock into the code-finding position, the above-mentioned key is required, with which the locking cylinder can be rotated in the locked position of the operating handle.Rotating the cylinder core of the locking cylinder results in a displacement of a bolt that forms the bolt head. The bolt head is thereby moved out of the path of movement of the locking element of the tumbler. The locking element is preferably a locking arm of the rocker forming the tumbler. The locking arm can thus pass the position of the bolt head. In a preferred embodiment, the rear end of the bolt forms a second stop, which, when the bolt head is retracted, can engage a stop on the housing of the lock. The housing forms a bearing cavity in which the actuating element can be rotated. The actuating handle can therefore only be rotated through a limited angle of rotation, which is sufficient, however, to displace the coding cam into the escape space in the manner described above. The adjusting bushing directly adjacent to the coding cam is now no longer supported on the coding cam.The side wall of the radially projecting, wheel-shaped projection of the adjusting bushing now rests against an effective surface of the code-finding element. Since the distance between the effective surfaces of the code-finding elements is smaller than the axial length of the adjusting bushings or the axial distance between the side walls of the projections of the adjusting bushings, the adjusting bushings arranged further away from the coding cam do not rest with their side wall on the coding cam assigned to them, but rather are slightly spaced from it. If the number wheel of a first adjusting bushing, which in this case is the adjusting bushing closest to the coding cam, is now rotated, the side wall rubs against the code-finding element until the code-finding element can enter the recess in the adjusting bushing. This occurs in a rotational position of the adjusting bushing in which it assumes its release position, i.e. the sensing element of the locking device can enter the corresponding pocket of the radial projection of the adjusting bushing.The entry of the code-finding element into the recess of the adjusting sleeve results in an axial displacement of the adjusting sleeve, so that the side wall of the second adjusting sleeve then comes into contact with the code-finding element assigned to it, and this second adjusting sleeve can be moved into a release position by turning the number wheel assigned to it. In this way, all adjusting sleeves are gradually moved into the release position so that the opening code can be found again. When the last adjusting sleeve is turned into its release position, the sensing elements can enter their assigned pockets in the tumbler. By closing the locking cylinder, the stop is moved from its stop position and the bolt head is moved into its forward position, so that the actuating handle can be moved into its open position. The tumbler, in particular the rocker, forms sensing elements that have roof-shaped slopes relative to one another.In the release position of all adjusting bushings, these enter into pockets in the adjusting bushings, which have a V-shaped cross-section. Each adjusting bushing has a pocket into which an associated sensing element can enter. The sensing elements can have sensing flanks which, in the release position of the guard locking, rest against corresponding walls of the pocket. A spring element is provided with which the guard locking is spring-loaded against the locking direction. This spring element is thus able to urge the sensing elements into the pockets. The spring element is tensioned by the return element in the end positions of the rotary knob. Between the two end positions, the spring element should be untensioned so that the number wheels can be turned more easily. The code finding elements can be different from the sensing elements. However, they can also be identical to the sensing elements if they are suitably shaped. The coding cams are preferably locally assigned to the sensing elements.The recess is then locally assigned to the pocket. Short description of the drawings

[0011] The invention is explained in more detail below using exemplary embodiments. They show: Fig. 1 a perspective view of a housing 1 of the lock arranged, for example, on a wing of a cabinet, Fig. 2 a first exploded view of the essential elements of the closure, Fig. 3 a second exploded view of the essential elements of the closure, Fig. 4 the coding device 29 of the closure in spatial association with an actuating handle 12 designed as a rotary knob in the open position of the closure, Fig. 5 a perspective view of a part of the coding device 29 and the actuating handle 12 in the open position of the closure, Fig. 6 the section along the line VI-VI in Fig. 4, Fig. 7 a representation according to Fig. 4, but with the operating handle 12 rotated 90° from the open position towards the locked position, Fig. 8 the section along the line VIII - VIII in Fig. 7, Fig. 9 a perspective view of the closure in its position in the Fig. 7 and Fig. 8, in which a return element 30 assumes its operative position, Fig. 10 a further perspective view in a rotational position of the actuating handle 12 in its locking position, Fig. 11 the section along the line XI-XI in Fig. 10, Fig. 12 shows a further perspective view in which the actuating handle 12 is slightly displaced from its locking position towards the open position after a coding cam 11, resting on a second control bevel 18, has been displaced radially inwards relative to the axis of rotation of the actuating handle 12 and lies under a third control bevel 20, Fig. 13 the section along the line XIII-XIII in Fig. 12, Fig. 14 an operating position in which the actuating handle 12 is moved from its Fig. 12 and Fig. 13 has been further rotated towards its open position, but a bolt 24 has previously been displaced, Fig. 15 the cut as in Fig. 13, whereby the actuating handle 12 has been rotated further toward the open position. The control body 13 is now above the coding cam 11, Fig. 16 the operating position according to Fig. 15 in a perspective view, Fig. 17 the coding device 29 with adjusting bushings 3 axially displaced from each other, so that the left adjusting bushing rests against the code finding element 7 assigned to it, Fig. 18 section XVIII in Fig. 17 to clarify the code finding. Description of the embodiments

[0012] The lock has a housing 1 in which a coding device 29 is arranged. The coding device has a housing made of die-cast zinc, in which a bearing shaft is arranged, on which several number wheels 2 and adjusting bushings 3 are mounted for independent rotation. The number wheels 2 have numbers on their outer surface. Coupling pins 4 protrude from their broad sides, which can enter coupling openings 5 ​​of each adjusting bushing 3 in order to be rotationally coupled to the adjusting bushing 3 in a predeterminable rotational position relative to the adjusting bushing 3.

[0013] Each adjusting bushing 3 has a pocket 9 formed by a radial indentation. The pocket 9 has two pocket walls arranged in a V-shape relative to each other. Approximately in the apex area of ​​the pocket 9, the adjusting bushing 3 has a recess 8 that interacts with a code-finding element 7 of a tumbler 6.

[0014] The tumbler 6 is pivotally mounted on the coding device 29 about a pivot axis running parallel to the bearing axis 37 of the adjusting bushings 3 and the number wheels 2. The tumbler 6 has an arm protruding from the housing of the coding device 29, which forms a locking arm 23. The tumbler 6 is biased by a third spring element 48 in the direction of the bearing axis 37. The tumbler 6 forms a plurality of sensing elements 10, each assigned to an adjusting bushing, which engage in a pocket 9 when the adjusting bushings 3 are rotated in a position corresponding to an open position of the coding device 29, so that the tumbler 6 moves from a locked position to a released position. The sensing elements have sensing flanks arranged in a roof-like manner relative to one another. The sensing elements 10 thus form sensing projections.

[0015] Each number wheel 2 has a heart-shaped cam 36 on one of its two broad sides, which is engaged by the arm of a reset member 30, which is also pivotably mounted in the housing of the coding device 29 about an axis parallel to the bearing axis 37. The coding device 29 forms a housing on which the reset member 30 and the tumbler 6 are pivotally mounted. The third spring element 48 is supported on the bottom of the housing. This third spring element 48 acts on the tumbler 6, which is pivotally mounted on the coding device 29. The reset member 30 has a plurality of arms and a control arm 31 projecting from the coding device 29. The control arm 31 interacts with a control cam 32 consisting of several control flanks 33, which is assigned to the actuating handle 12 designed as a rotary knob. If the actuating handle 12 is turned, the return element 30 pivots.Its reset elements 47 engage the heart curves 36 to bring the number wheels 2 into a zero position.

[0016] The control cam 32 is formed by an actuating handle 12. The actuating handle 12 is rotatably mounted in a bearing cavity 27 of the housing 1. The control cam 32 has roof-like control flanks 33, which lead to a displacement of the control arm 31 in the axial direction relative to the rotational axis of the actuating handle 12. The control flanks 33 meet at a vertex 34. When the control arm 31 reaches the vertex 34, the number wheels 2 are set to zero. The actuating handle 12 is made up of several parts. It has a cover part 41, which covers a core part. The core part is formed by a cylinder housing 44, in which a cylinder core 42 is inserted. A sleeve-shaped control body 13 sits on the cylinder housing 44 and is cushioned relative to the hood part 41 by means of a second spring element 43.The cylinder core 42 can rotate an adjusting element 46, which is arranged in a bolt support element 45, in order to displace a bolt 24. The bolt support element 45 is partially inserted into a control cylinder 49, which forms the control cam 32 mentioned above.

[0017] The adjusting bushings 3 are axially biased by a first spring element 38 in the uncoupling direction. The adjusting bushings 3 can be moved axially by a coding cam 11 against the restoring force of the first spring element 38 from the uncoupled position to the coupled position, in which the coupling pins 4 engage in the coupling openings 5. For this purpose, the adjusting bushings 3 are in axial contact with one another.

[0018] The coding cam 11 protrudes from the housing of the coding device 29 and into the bearing cavity 27. The actuating handle 12 has a control cam arrangement with which, when the actuating handle 12 is rotated, the coding cam 11 can be displaced in the axial direction relative to the bearing axis 37 and in the radial direction relative to the rotational axis of the actuating handle 12. The control cam arrangement has a first stop 22, against which a flank of the coding cam 11 rests in an open position of the closure. The first stop 22 forms a rotational stop of the actuating handle 12 and is the wall of a coding recess 14, in which the coding cam 11 is located in the open position ( Fig. 4 to 6). The coding cam 11 assumes an axial position relative to the bearing axis 37 such that the adjusting bushings 3 are not coupled to the number wheels 2. The number wheels 2 can thus be freely adjusted relative to the adjusting bushings 3, so that a code change is possible. The adjusting bushings 3 are not rotatable in this operating position, since the sensing elements 10 lie in the pockets 9 of the adjusting bushings 3. The code-finding elements 7 in the recesses 8 are even more effective, especially when the locking device 6 is not spring-loaded during code erasure.

[0019] In this disclosure ( Fig. 4 to 6) of the lock, a code can be set by turning the number wheels 2. If the operating handle 12 is then turned in the direction of the arrow so that the first stop 22 moves away from the coding cam 11, a sliding flank of the coding cam 11 slides along a first control bevel 15 of a cylindrical control body 13, which also forms the first stop 22. In the process, the coding cam 11 is displaced radially outwards relative to the axis of rotation of the operating handle 12. The coding cam 11 is displaced axially relative to the bearing axis 37 and pushes the adjusting bushings 3 towards the number wheels 2 so that the coupling pins can engage in the coupling openings 5. After leaving the first control slope 15, the coding cam 11 slides along a first cylinder surface section 16 of the cylindrical control body 13 which is connected in a rotationally fixed manner to the actuating handle 12.During this rotary movement, the control arm 31 runs along the control flanks 33. At the start of this rotary movement, the third spring element 48 acting on the tumbler 6 is deactivated. The tumbler then assumes an undefined position. The locking arm 23 of the tumbler 6 can lie either in the path of movement or outside the path of movement of the locking head 25 of the bolt 24 of the actuating handle 12. If the locking arm 23 lies in the path of movement of the locking head 25, it strikes an inclined surface of the locking head, which can deflect against the restoring force of a spring, so that the locking head 25 can pass the locking arm 23. In a subsequent phase of the rotary movement, the control arm 31 passes the apex 34, so that the number wheels 2 coupled to the adjusting bushings 3 are brought into a zero position. This operating position is shown in the . Fig. 7 to 9. In the final phase of the rotary movement of the actuating handle 12, the coding cam 11 passes over a third control bevel 20 to strike against a radially inwardly offset second control bevel 18, which runs on a spiral path around the axis of rotation of the actuating handle 12. The two control bevels 18, 20 are in the Fig. 10 and Fig. 11, which represent the closure in the locked position. When overrunning the third control bevel 20, the coding cam 11 performs a slight radial inward movement towards the axis of rotation of the actuating handle 12. The second control bevel 18 controls the coding cam 11 back to a second cylinder surface section 19 of the cylinder surface of the control body 13. This is the locked position ( Fig. 10 and Fig. 11) is reached, in which the number wheels 2 assume their zero position and in which the tumbler 6 is in a blocking position, so that the blocking arm 23 lies in the same plane of rotation of the actuating handle 12 in which the locking head 25 is also located.

[0020] To open the lock, the number wheels 2 must be set to the correct code position. In this open position, the push buttons 10 can engage the pockets 9 of the adjusting bushings 3, allowing the tumbler 6 to reach its release position. In the release position, the locking arm 23 of the tumbler 6 lies in a plane of rotation that is axially offset from the axis of rotation of the actuating handle 12 and the plane of rotation of the locking head 25. While in the locked position of the tumbler 6, the actuating handle 12 can only be turned until the bolt 24 abuts the locking arm 23, which lies in the same plane of rotation, the actuating handle 12 can be turned further in the release position because the locking arm 23 can pass the locking head 25 in a different plane of rotation.

[0021] During the rotation of the actuating handle 12 from the locking position toward the open position, the coding cam 11 slides along the second control slope 18 adjoining the second cylinder surface section 19 and is slightly displaced in the axial direction relative to the bearing axis 37 or in the radial direction relative to the rotational axis of the actuating handle 12 toward the rotational axis of the actuating handle 12. The coding cam 11 then abuts the third control slope 20 of the control body 13, which runs obliquely relative to the axis of the control body 13. (see Fig. 12 and Fig. 13). Since the control body 13 is axially displaceable relative to the core 39 of the actuating handle 12, the control body 13 deflects in the axial direction when sliding along the third control slope 20 against the restoring force of the second spring element 43. This results in the coding cam 11 not running along the first cylinder surface section 16, but entering an escape space 21 (see Fig. 15 and Fig. 16). This is associated with an axial displacement of the coding cam 11 relative to the bearing axis 37, which results in the adjusting bushings 3 also moving away from the number wheels 2 in the axial direction, so that the coupling pins 4 emerge from the coupling openings 5. The number wheels 2, which are now in a decoupled position relative to the adjusting bushings 3, can be rotated freely. This is achieved by the return elements 47 of the return member 30, which engage the heart-shaped cams 36, and whose control arm 31 is in turn controlled by the control flanks 33. Because the spring force applied to the tumbler 6 is eliminated, it remains in an undefined position.

[0022] In the final phase of the opening rotation of the actuating handle 12, the coding cam 11 overruns the first control bevel 15, which runs diagonally to the radial, to enter the coding recess 14 and then strikes the first stop 22. In this opening position, the previously set code is erased. Entry into the coding recess 14 occurs through an axial return displacement of the control body 13 into the Fig. Operating position shown in 4 to 6.

[0023] The lock thus has the property that when an actuating handle 12 is actuated, the coding device 29 is moved from a closed position of the lock to an open position of the lock into a coding position in which the last set code is deleted, in particular the number wheels 2 are set to zero.

[0024] The lock not only has a code set function, but also a code finder function. The starting position for the code finder function is the locking position of the lock (see Fig. 10 and Fig. 11). In this locking position, the coding cam 11 lies on the first cylinder surface section 16 of the outer surface of the control body 13, which is non-rotatably but axially displaceably assigned to the actuating handle 12 or its core 39. The actuating handle 12 can only be rotated by a small angle of rotation, since the locking arm 23 lies in the path of movement of the locking head 25, which projects from the radial inside into a recess 35 in which the locking arm 23 can move.

[0025] By inserting a suitable key into the locking cylinder 40 and turning the cylinder core 42, the adjusting element 46 is rotated, and the bolt 24 mounted in the bolt holder element 45 is retracted via an eccentric pin of the adjusting element 46. This occurs in the radial direction relative to the axis of the actuating handle 12. The locking arm 23 can then move past the retracted bolt head 25 when the actuating handle 12 is rotated.

[0026] The rear end of the bolt 24 forms a second stop 26. This second stop 26 is given a radial forward position during the bolt retraction, so that it can strike against a third stop 28 of the bearing cavity 27 when the rotary knob is rotated by approximately 40° (see Fig. 14). During this stop-limited rotation of the actuating handle 12, the coding cam 11 slides along the second control bevel 18 of the control body 13, which runs obliquely to the radial or tangential direction, in order to displace itself slightly in the axial direction relative to the bearing axis 37 and in the radial direction relative to the rotational axis of the actuating handle 12, until it abuts the third control bevel 20 of the control body 13, which runs obliquely to the axial direction of the control body 13, which displaces the control body 13 in the axial direction so that the coding cam 11 can enter the escape space 21.

[0027] The arms of the tumbler 6 each carry a code-finding element 7 in the area of ​​the apex of the sensing elements 10. This code-finding element 7 projects from a sensing element 10 in the direction of the bearing axis 37 of the adjusting bushing 3. This adjusting bushing 3 has a radially outwardly projecting projection in the shape of a wheel, which forms the pocket 9. In the apex area of ​​the pocket 9 there is a recess 8 into which the code-finding element 7, designed as a cam, can enter when the adjusting bushing 3 assumes its release position. In the code-finding position, however, the adjusting bushings 3 are not in their release position, so that an effective side surface of the code-finding element 7 rests against the side wall 3' of the adjusting bushing 3. The adjusting bushing 3 cannot therefore enter its uncoupling position. All adjusting bushings 3 remain in their position coupled to the respective number wheel.The code finding elements 7 resting on the side wall 3' thus prevent an axial displacement of the adjusting bushings 3 in the direction of the disengaged position.

[0028] The axial distance between the code-finding elements 7 is slightly less than the length of the adjusting bushings 3, which are in axial contact with one another. The axial distance between the code-finding elements 7 is preferably approximately 0.2 mm less than the length of the adjusting bushings 3. This results in the side wall 3' of the adjusting bushing 3, which is closest to the coding cam 11, being in contact with the code-finding element 7. The side walls 3' of the adjusting bushings 3 further away from the coding cam 11 are at increasingly greater distances from the code-finding elements 7, since the adjusting bushings 3 are in axial contact and the first spring element 38 engages in the axial direction on the adjusting bushing 3 furthest from the coding cam 11. The adjusting bushings 3 can now be rotated one after the other into the release position, starting with the adjusting bushing 3 closest to the coding cam 11.The code-finding element 7 rubs against the side wall 3' of the second adjusting bushing until it is aligned with the recess 8 and engages there. This engagement can be felt or heard, or in any case, can be perceived by the senses. The engagement depth can be so great that the number wheel 2 can no longer be turned after the code-finding element 7 has engaged the recess 8. Due to the resulting axial displacement of the consecutive adjusting bushings 3, the side wall 3' of the second adjusting bushing 3 presses against the code-finding element 7, so that this adjusting bushing 3 can now be moved into the release position by turning its number wheel 2. In this way, all adjusting bushings are moved into the release position in sequence up to the last adjusting bushing 3, so that the code is found.

[0029] By turning back the cylinder core 42 of the locking cylinder 40, the second stop 26 (see Fig.14) of the bolt 24 is radially relocated, and the bolt head 25 is radially extended. The actuating handle 12 can now be rotated into the open position, with the control arm 31 again controlling the reset element 30 into its zero-setting function by overrunning the apex 34.

[0030] In the uncoupled position, the code-finding elements 7 are located in the recesses 8 of the adjusting bushings and prevent their rotation. In the coupled position, they are located axially to the side of the edge section.

[0031] The above statements serve to explain the inventions covered by the application as a whole, which each independently develop the state of the art by at least the following combinations of features, namely:

[0032] A closure which is characterized in that the code-finding elements 7 are cams which interact with recesses 8 of the adjusting bushing 3 and which, when the release position of the adjusting bushing 3 is reached, engage in the recess 8 under spring force, wherein the adjusting bushings 3 can be brought into the code-finding position by a displacement of a coding cam 11 in the direction of a bearing axis 37 which supports the adjusting bushings 3, in which at least one side wall 3' of an adjusting bushing 3 rests against a code-finding element 7 under spring force.

[0033] A closure which is characterized in that in the code-finding position initially only the side wall 3' of a first adjusting bushing 3 rests against a code-finding element 7 assigned to it and the side wall 3' of a second adjusting bushing 3 only rests against a code-finding element 7 assigned to it when the first adjusting bushing 3 has been rotated into its release position.

[0034] A closure which is characterized in that, with respect to the bearing axis 37, the axial distance of the side walls 3' of the adjusting bushings 3 differs from the axial distance of the code-finding elements 7 and is in particular greater.

[0035] A closure which is characterized in that the code-finding elements 7 are different from touch elements 10 of a tumbler 6, which interact with a pocket 9 of the adjusting bush 3 in order to displace the locking arm 23 into a release position when all touch elements 10 enter the pocket 9 assigned to them, in which release position the locking arm 23 exits the path of movement of the locking head 25, and in particular it is provided that the code-finding element 7 is locally assigned to the touch element 10.

[0036] A closure which is characterized in that the two control devices 11, 18, 20, 31, 32, 33 are designed in such a way that when the actuating handle 12 is moved from the locked position to the open position, first the adjusting bushings 3 held in the release position are uncoupled from the number wheels 2 and then the number wheels 2 are brought into the neutral position.

[0037] A closure characterized in that the first control device 11, 18, 20 forms a first control cam arrangement 15, 16, 18, 19, 20 assigned to the actuating handle 12, with which the coding cam 11 can be brought from a normal operating position, in which the number wheels 2 are rotationally coupled to the adjusting bushings 3, into a coding position in which the number wheels 2 are uncoupled from the adjusting bushings 3 in such a way that each number wheel 2 can be freely rotated relative to the associated adjusting bushing 3.

[0038] A closure which is characterized in that the first control cam arrangement 15, 16, 18, 19, 20 has a first control slope 15 which controls the coding cam 11 in the axial direction of the arrangement of the adjusting bushes 3 from the coding position into the normal operating position.

[0039] A closure which is characterized in that the first control cam arrangement 15, 16, 18, 19, 20 has a third control slope 20 which controls a first cylinder jacket surface section 16 from the movement path of the coding cam 11, so that the coding cam 11, acted upon by a first spring element 38, changes from its normal operating position into the coding position.

[0040] A closure characterized in that the actuating handle 12 is a rotary knob having a control body 13 which is axially displaceable relative to the axis of rotation of the actuating handle 12 against the restoring force of a second spring element 43 and which has the first control cam arrangement 15, 16, 18, 19, 20.

[0041] A closure characterized in that the first control cam arrangement has a second control bevel 18 which controls the coding cam 11 from its normal operating position towards its coding position in order to bring it into the area of ​​action of a third control bevel 20 which displaces the control body 13 in the axial direction in such a way that the coding cam 11 enters an escape space 21 and thereby assumes its coding position.

[0042] A closure which is characterized in that the coding cam 11 lies in a coding recess 14 in a rotational end position corresponding to the open position of the actuating handle 12, the wall of which forms a first control slope 15 in order to control the coding cam 11 into the normal operating position when the actuating handle 12 is rotated into the blocking position.

[0043] A closure, which is characterized in that the second control device 31, 32, 33 has a second control cam arrangement 32, 33, 34 assigned to the actuating handle 12, with which a control arm 31 of the return member 30 can be brought from an inoperative position into an operative position, in which return elements 47 of the return member 30 act on a heart curve 36 of the number wheels 2, wherein the second control cam arrangement 32, 33, 34 has control flanks 33 running in particular obliquely to the axis of the actuating handle 12 designed as a rotary knob, which transition in a roof-shaped manner into a vertex 34 which is aligned in the circumferential direction of the actuating handle 12 to the position of the locking head 25 in such a way that when the actuating handle 12 is rotated, the adjusting bushings 3 are initially displaced axially relative to the number wheels 2 by the reset elements 47 engaging the heart curves 36 in the zero position.

[0044] A closure which is characterized in that the actuating handle 12, in particular the rotary knob, has a locking cylinder 40 with which a bolt 24 having the bolt head 25 can be displaced in such a way that the bolt head 25 is no longer in the path of movement of the locking arm 23.

[0045] A closure which is characterized in that the bolt 24 forms with its rear end a second stop 26 which, in the code finding position, rests against a third stop 28 of a bearing cavity 27 of a housing 1 in which the actuating handle 12 is mounted.

[0046] A closure which is characterized in that the two control devices 11, 18, 20, 31, 32, 33 are designed such that when the actuating handle 12 is moved from the open position into the locked position, the return member 30 comes into effect in order to rotate the number wheels 2 coupled to the adjusting bushings 3 into the neutral position. List of reference symbols 1 housing 2 number wheel 3 adjusting bushing 3' side wall 4 coupling pins 5 Coupling opening 6 Tumbler 7 Code finding element 8 recess 9 bag 10 button element 11 coding cams 12 Operating handle 13 control bodies 14 coding niches 15 first control slope 16 first cylinder surface section 18 second control slope 19 second cylinder surface section 20 third control slope 21 Alternative room 22 first attack 23 Locking arm 24 bars 25 bolt head 26 second attack 27 Bearing cavity 28 third attack 29 Coding device 30 return element 31 Control arm 32 control curve 33 Control flank 34 vertices 35 puncture 36 Heart curve 37 Bearing axis 38 first spring element 39 core 40 locking cylinders 41 Hood part 42 cylinder core 43 second spring element 44 cylinder housings 45 Latch support element 46 Control element 47 reset elements 48 third spring element 49 control cylinders

Claims

[1] A closure with adjusting bushings (3) arranged axially one behind the other, which are coupled to number wheels (2) and can be uncoupled therefrom by means of a first control device (11, 18, 20) in order to change an opening code, which can be brought into a release position by turning the number wheels (2) into an opening code position, in which release position a blocking arm (23) moves out of the path of movement of a locking head (25) arranged on an actuating handle (12), so that the actuating handle (12), which is otherwise held in a blocking position by the blocking arm (23) lying in the path of movement of the locking head (25), can be brought from the blocking position into an open position, wherein the actuating handle (12) can be brought into a code-finding position in order to turn the number wheels (2) coupled to the adjusting bushings (3) into their opening code position, with code-finding elements (7) which, in the code-finding position, engage with the adjusting bushings (3) cooperate in such a waythat when one of the number wheels (2) is turned, the reaching of the release position of the associated adjusting bush (3) can be sensed, , characterized by in that the code-finding elements (7) are cams which interact with recesses (8) in the adjusting bushings (3) and which, when the release position of the adjusting bushings (3) is reached, engage in the recesses (8) under spring force, wherein the adjusting bushings (3) can be brought into the code-finding position by a displacement of a coding cam (11) in the direction of a bearing axis (37) which supports the adjusting bushings (3), in which at least one side wall (3') of an adjusting bushing (3) rests against a code-finding element (7) under spring force. [2] Closure according to claim 1, characterized bythat in the code-finding position, initially only the side wall (3') of a first adjusting bushing (3) rests against a code-finding element (7) assigned to it, and the side wall (3') of a second adjusting bushing (3) only rests against a code-finding element (7) assigned to it when the first adjusting bushing (3) has been rotated into its release position. [3] Closure according to claim 1 or 2, characterized by that, with respect to the bearing axis (37), the axial distance between the side walls (3') of the adjusting bushes (3) differs from the axial distance between the code-finding elements (7) and is in particular greater. [4] Closure according to one of claims 1 to 3, characterized bythat the code-finding elements (7) are different from touch elements (10) of a tumbler (6), which interact with pockets (9) of the adjusting bushings (3) in order to displace the locking arm (23) into a release position when all the touch elements (10) enter the pocket (9) assigned to them, in which release position the locking arm (23) exits the path of movement of the locking head (25), and in particular it is provided that each code-finding element (7) is locally assigned to a touch element (10) and in each case a recess (8) is assigned to a pocket (9). [5] Closure according to one of the preceding claims, in which, in the release position, the locking arm (23) is held out of the path of movement of the locking head (25) arranged on the actuating handle (12), so that the actuating handle (12), which is otherwise held in a locking position by the locking arm (23) lying in the path of movement of the locking head (25), can be brought from the locking position into the open position, with a return element (30) which, when the actuating handle (12) is moved, rotates the number wheels (2) from their opening code position into a neutral position under the control of a second control device (31, 32, 33), characterized bythat the two control devices (11, 18, 20, 31, 32, 33) are designed in such a way that when the actuating handle (12) is moved from the locked position to the open position, first the adjusting bushings (3) held in the release position are uncoupled from the number wheels (2) and then the number wheels (2) are brought into the neutral position. [6] Closure according to one of the preceding claims, characterized by in that the first control device (11, 18, 20) forms a first control cam arrangement (15, 16, 18, 19, 20) assigned to the actuating handle (12), with which the coding cam (11) can be brought from a normal operating position, in which the number wheels (2) are rotationally coupled to the adjusting bushings (3), into a coding position in which the number wheels (2) are uncoupled from the adjusting bushings (3) in such a way that each number wheel (2) can be freely rotated relative to the assigned adjusting bushing (3). [7] Closure according to claim 6, characterized bythat the first control cam arrangement (15, 16, 18, 19, 20) has a first control slope (15) which controls the coding cam (11) in the axial direction of the arrangement of the adjusting bushes (3) from the coding position to the normal operating position. [8] Closure according to one of claims 6 or 7, characterized by in that the first control cam arrangement (15, 16, 18, 19, 20) has a third control slope (20) which controls a first cylinder jacket surface section (16) from the movement path of the coding cam (11), so that the coding cam (11) changes from its normal operating position into the coding position when acted upon by a first spring element (38). [9] Closure according to one of claims 6 to 8, characterized bythat the actuating handle (12) is a rotary knob which has a control body (13) which is axially displaceable relative to the axis of rotation of the rotary knob against the restoring force of a second spring element (43) and which has the first control cam arrangement (15, 16, 18, 19, 20). [10] Closure according to one of claims 6 to 9, characterized by in that the first control cam arrangement (15, 16, 18, 19, 20) has a second control slope (18) which controls the coding cam (11) from its normal operating position towards its coding position in order to bring it into the effective range of a third control slope (20) which displaces the control body (13) in the axial direction in such a way that the coding cam (11) enters an escape space (21) and thereby assumes its coding position. [11] Closure according to one of claims 6 to 10, characterized bythat the coding cam (11) lies in a rotary end position corresponding to the open position of the actuating handle (12) in a coding recess (14), the wall of which forms a first control slope (15) in order to control the coding cam (11) into the normal operating position when the actuating handle (12) is rotated into the blocking position. [12] Closure according to one of claims 5 to 11, characterized bythat the second control device (31, 32, 33) has a second control cam arrangement (32, 33, 34) assigned to the actuating handle (12), with which a control arm (31) of the return member (30) can be brought from an inoperative position into an operative position, in which return elements (47) of the return member (30) engage heart curves (36) of the number wheels (2), wherein the second control cam arrangement (32, 33, 34) has control flanks (33) running in particular obliquely to the axis of the actuating handle (12) designed as a rotary knob, which merge in a roof-shaped manner into a vertex (34) which is aligned in the circumferential direction of the actuating handle (12) to the position of the locking head (25) in such a way that when the actuating handle (12) is rotated, first the adjusting bushings (3) are Axial displacement relative to the number wheels (2) can be brought into the zero position by the return elements (47) acting on the heart curves (36). [13] Closure according to one of claims 1 to 12, characterized by that the actuating handle (12), in particular the actuating handle (12) designed as a rotary knob, has a locking cylinder (40) with which a bolt (24) having the bolt head (25) can be displaced in such a way that the bolt head (25) no longer lies in the path of movement of the locking arm (23). [14] Closure according to claim 13, characterized by that the rear end of the bolt (24) forms a stop (26) which, in the code finding position, bears against a stop (28) of a bearing cavity (27) of a housing (1) in which the actuating handle (12) is mounted. [15] Closure according to one of claims 5 to 14, characterized bythat the two control devices (11, 18, 20, 31, 32, 33) are designed such that when the actuating handle (12) is moved from the open position to the locked position, the return member (30) comes into effect in order to rotate the number wheels (2) coupled to the adjusting bushes (3) into the neutral position.

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