EP1724417B1 - Lock element - Google Patents

Abstract

The device has a lock body (2), a rotary closure element (4) opposite the lock body, a cavity rising into the lock body in which an actuating element (8) for coupling to the lock element, rotatable relative to the lock body and lying outside the lock can be reversibly attached to a cylindrical attachment section (9). The attachment section has a constantly rotating peripheral groove that can be latched with a releasable latching element movable in the lock body radially to the axis of the cylindrical attachment section and acted on by a spring towards the actuator groove : An independent claim is also included for a tool for unlocking a latching element.

Description

The invention relates to a lock element with a lock body, an actuating element, a locking element rotatable relative to the lock body in a cavity in the lock body into which the lockable with the closing element and rotatable relative to the lock body, lying on a lock outer side actuator with a cylindrical mounting portion detachably fastened is. In addition, the invention relates to a tool for releasing the coupling of the actuating element with the closing element.

Such lock elements are used, for example, in conventional mortise locks, in which a profile cylinder serves as a lock body and a door handle or door knob as an actuating element. When installing such mortise locks in a door is faced with the task of attaching the actuators in the simplest possible, space-saving and visually appealing manner on the lock body. In general, it is not possible to mount on both sides of the lock body before installing the lock element in the door actuators, as provided in the door opening for the lock element is usually smaller than the actuators, so that only the example with a Actuator coupled lock element with its side facing away from this actuator side must be inserted through the opening before then the other actuator can be mounted on the lock body. At least on one side of the door lock so an actuator after installation of the lock body in the door must be retrofitted. In particular, in electronic locking systems exists in addition the problem that in an example designed as a door knob actuator mechanical and electronic components must be accommodated, so that comparatively little space for the attachment of the actuator is available on the lock body. In the case of electronic locking systems, this mainly concerns the inside of the lock, which is generally more complex than the outside of the lock.

A common solution known from the prior art suggests mounting at least one of the two actuators on a shaft extending through the door lock and by means of a fastener element acting radially on the shaft, e.g. to fix a threaded pin. However, this solution is optically unsatisfactory because the fastener is visible on the outside of the actuator. In addition, a solid shaft is required for a sufficiently stable attachment, which limits the space available for mechanical and electronic components space. In addition, assembly and disassembly of an attachable in this way actuator are relatively expensive.

The DE 102 35 201 A1 discloses a door closure system comprising a cylinder module and an actuation module. By means of a servomotor and a control slide, the cylinder module and the actuation module can be rotatably coupled together or decoupled from each other depending on an authorization code supplied by means of a key. The authorization code can be supplied via a transponder card, for example, which is brought to the locking system. The actuation module has a cylindrical attachment section with a circumferential groove, which can be latched with a latching element. The latching is releasable by means of an electric drive device.

In the EP 1 577 465 A1 A state of the art under Article 54 (3) EPC, discloses a lock element comprising a lock body, a closure member, a cavity projecting into the lock body, and an actuator having a mounting portion includes. The attachment portion has on its outer side a circumferential groove which can be latched with a latching element, wherein the closure body has a bore which extends from the lying on a lock outer end of the lock body up to the lock body mounted in the lock body, and wherein the latching a plugged from the lock outside through the hole tool is solvable.

Object of the present invention is to provide a lock element of the type mentioned in which an actuator in a simple and space-saving manner is releasably fastened, but to prevent the detachable actuator can be solved by an unauthorized person from the outside.

This object is achieved by the features of claim 1. The lock element in this case has a protruding into the lock body cavity, in which the actuating element with a cylindrical mounting portion is releasably fastened. The cylindrical attachment portion of the actuating element has continuously a circumferential circumferential groove which can be latched with a latching element, which is guided radially to the axis of the cylindrical mounting portion slidably in the lock body and acted upon by a spring in the direction of the groove of the actuating element. The lock body has a bore which extends from the end of the lock body lying on a lock inner side at least as far as the lock element mounted in the lock body. The latching can be released by a tool inserted from the inside of the lock through the hole. The actuating element is thus secured by the latching of the groove with the corresponding locking element against axial displacement. Overall, virtually no installation space for the attachment is lost on the part of the actuator, so that, for example, in a door knob of an electronic door lock the entire interior of the doorknob for mechanical and electronic components is available. Since the locking of the locking element can be solved with the groove only from a castle inside out, can the actuator can not be removed from the outside of the lock. In addition, no fasteners are visible from the outside in the construction according to the invention, which is very advantageous in terms of the design of the castle.

Advantageous embodiments of the invention are described in the description, the figures and the subclaims.

The cylindrical attachment portion may have at its protruding into the lock body end a conical taper, which allows a displacement of the locking element against the spring tension during insertion of the actuating element into the cavity of the lock body. If the lock body is already mounted in a door lock, the actuator can thus be easily attached to the lock element. When inserting the actuator with its conically tapered mounting portion in the cavity of the lock body, the force applied during insertion force is converted by the inclined surface on the tapered mounting portion in a radially extending force which can compress the spring. When the actuating element is inserted far enough into the cavity, its circumferential circumferential groove engages with the locking element, this being pressed by the spring in the direction of the groove. The actuator can therefore be attached by simply plugging, without the need for a tool would be necessary, at the same time assembly errors are reliably avoided.

According to an advantageous embodiment of the invention, the latching element may be guided along a running inside the lock body, in particular linear guideway, wherein its movement is limited in two opposite directions extending radially to the axis of the cylindrical mounting portion directions by means of stop elements. Along the guide track running completely outside the fastening element, the latching element is thus accommodated in a space-saving manner relative to the interior of the fastening element and the travel by which the latching element is displaceable radially relative to the axis of the cylindrical fastening section is limited by means of the stop elements. In the one extreme position of the locking element of the mounting portion of the actuating element is latched to the locking element, in the opposite extreme position, the locking element is spaced from the groove of the mounting portion, so that there is no engagement between locking element and groove, whereby the actuator with its cylindrical mounting portion in the lock body axially can be moved.

As stop elements, for example, provided in the locking element slot and provided in the lock body pin, which extends through the slot serve. The greater the longitudinal extent of the slot compared to the diameter of said pin, the greater the distance to which the locking element in the radial direction can be moved. Such a construction is easy to implement and also durable and maintenance-free.

According to a preferred embodiment of the invention, the spring, which acts on the latching element in the direction of the groove of the fastening section, may be arranged in a recess of the latching element extending radially to the axis of the cylindrical fastening section. The above-mentioned pin, which serves as a stop element, can form a supporting element for the spring with an area extending into this recess. The recess in which the spring is arranged, may be open on the surface of the lock body, but also a chamber-like closed recess is conceivable.

According to a further preferred embodiment of the invention, the latching element has a bore which has at least substantially the same diameter as the bore on the lock body, and wherein the two bores are parallel to the axis of the cylindrical attachment portion. The two holes are arranged so that the lock body-side bore extending from the inside of the lock end of the lock body to which the actuator is fastened, up to the bore of the locking element mounted in the lock body, and that the two holes in compressed spring together are aligned and overlap partially with relaxed spring. With a compressed spring, the two holes are thus axially behind one another.

Such an arrangement allows a release of the locking of the locking element with the actuating element from the inside of the lock with the aid of a special eccentric tool according to claim 13. Such Tool is similar to a screwdriver with a handle and attached thereto, preferably formed of metal rod that can be inserted into the lock body side bore. The handle remote from the end of this metal rod forms an eccentric extension whose cross section is smaller than that of the rod at its end having the extension, wherein the cross section of this end corresponds approximately to the lock body side bore. In a relaxed spring, the two holes overlap only partially and the eccentric can be introduced with its cylindrical extension through the lock body side bore in the overlap region of the hole provided in the locking element. When the eccentric tool is now rotated, the locking element is pulled away from the groove of the mounting portion and the spring is compressed. The two holes are aligned with each other, and the locking of the locking element with the actuating element is released.

The rod of the eccentric tool from the EP 1 577 465 A1 has over its entire length a constant cross-section, which then corresponds to the cross-section at its end having the extension in approximately the cross section of the lock body side bore. In this case, the manufacture of the tool is particularly simple.

According to the invention, however, the rod also has a smaller cross-section over a large part of its length than the bore body-side bore. The rod then sits in this section with reduced compared to its end face cross section with clearance in the lock body side bore. If the bore in the lock body has irregularities, for example, if it is not completely rectilinear, the tool according to the invention can still be inserted into the bore until its eccentric extension as described above engages in the two overlapping holes.

The actuator is in the manner explained relatively easily from the lock inside of the lock body solvable, nevertheless, the fact that a special tool is necessary to release the locking, some protection against improper removal of the actuator. It is particularly advantageous that the actuator can be mounted and dismantled as often as desired, without the lock element is damaged or without signs of wear occur.

To further safeguard against improper removal of the actuating element, a bore for a forend screw can run at least partially through the bore body-side bore. Consequently, if the forend screw is properly screwed into this bore, which is of course perpendicular to the bore body-side bore and provided for it, it traverses the bore body-side bore at least with part of its shaft and thus obstructs the path for a tool. The eccentric tool according to the invention can therefore only be introduced for releasing the locking of the actuating element in this bore when the forend screw has been previously unscrewed. Since the forend screw is accessible only when the door is open, a non-authorized thus can not solve the actuator with the door closed, even from the inside, even if he is in possession of the necessary tool.

According to a further preferred embodiment of the invention, the lock body-side bore extends over the entire length of the lock body in the direction of the axis of the cylindrical attachment portion and is locked at the castle outside. The correct position of the bore can be ensured in this case easier than with an asymmetrical bore which extends from the lock inside to the lying on the opposite side of the closing element actuator, as can be drilled from both sides of the castle to the center. To prevent manipulation of the outside of the lock, the hole is then closed on the outside of the lock, for example by a steel pin with a matching cross-section, which can be pressed so that it is flush with the lock body.

The diameter of the two holes extending parallel to the axis of the cylindrical attachment portion may be between 2 mm and 5 mm, in particular approximately 3 mm. With a relaxed spring, the two holes overlap preferably about half of their diameter. In this way, an optimal force transmission when attaching an eccentric tool for releasing the locking is achieved at a reasonable engagement depth between locking element and groove.

The lock element according to the invention can have a shaft rotatably mounted centrally in the cavity of the lock body, which shaft is non-rotatably connected at one end to the first actuation element, whereas a second actuation element has a receptacle for the other end of the shaft. With the help of additional coupling elements, it is possible due to the existing shaft to produce a frictional connection between the two actuators. Since the shaft is not used for fixing the first actuating element, it can also be designed as a hollow shaft, whereby additional space for electronic components, cables or the like is available.

The attachment portion may merge at its projecting into the cavity of the lock body end in an integrally formed with the attachment portion shaft. But it can also be rotatably connected to a separately formed shaft. This shaft may be formed both in one piece and in several parts, for example, it may consist of several rotatably connected sections. The coupling between the two actuators may alternatively be made in other ways.

The lock body may for example have the shape of a standard commercial profile cylinder. Such a lock body can, without additional adapters are necessary to be used in conventional door locks with standardized dimensions.

Such a molded lock body consists of an upper portion with a cylindrical cross section and a lower portion with an elongated cross section. The guided in the lower portion of the lock body portion of the locking element must be narrower than the lower portion of the lock body in a direction perpendicular to the longitudinal center plane of the lock member direction. In order to achieve a better power transmission between the latching element and the attachment portion, the latching element may have at its upper end a matching in the circumferential circumferential groove of the attachment portion locking portion, which in a direction perpendicular to the longitudinal center plane of the lock member direction a greater ready than the lower portion of the profile cylinder has. That portion of the groove with which it engages with the locking element is enlarged in this way, whereby a better grip is achieved.

Fig. 1

einen teilweisen Schnitt durch die Längsmittelebene eines erfindungsgemäßen Schlosselements, wobei das Rastelement mit dem Betätigungselement verrastet ist, mit einem in das Schlosselement eingeführten Exzenterwerkzeug;

Fig. 1A

einen vergrößerten, das Rastelement und die Spitze des Exzenterwerkzeugs umfassenden Ausschnitt aus der Fig. 1;

Fig. 1B

den gleichen Ausschnitt wie die Fig. 1A, wobei im Gegensatz zur Fig. 1A das Rastelement nicht mit dem Betätigungselement verrastet und der Befestigungsabschnitt des Betätigungselements nicht vollständig in den schlosskörperseitigen Hohlraum eingeschoben ist;

Fig. 2

eine seitliche Ansicht eines Exzenterwerkzeugs zum Lösen der Verrastung des Rastelements mit dem Betätigungselement;

Fig. 2A

einen vergrößerten, die Spitze des Exzenterwerkzeugs umfassenden Ausschnitt aus Fig. 2;

Fig. 3

eine perspektivische Ansicht des erfindungsgemäßen Schlosselements mit zur Montage eines Türknaufs geeigneten Betätigungselementen, und

Fig. 4

eine Ansicht eines erfindungsgemäßen Verriegelungsabschnitt des Rastelements mit senkrecht zur Längsmittelebene des Schlosselements verlaufender Blickrichtung.

In the following the invention will be described in more detail by means of a preferred embodiment and with reference to the accompanying drawings. Showing:

Fig. 1

a partial section through the longitudinal center plane of a lock element according to the invention, wherein the locking element is locked to the actuating element, with an inserted into the lock element eccentric tool;

Fig. 1A

an enlarged, the locking element and the tip of the eccentric comprehensive cutout of the Fig. 1 ;

Fig. 1B

the same section as the Fig. 1A , whereas contrary to Fig. 1A the locking element is not locked to the actuating element and the fastening portion of the actuating element is not completely inserted into the lock body side cavity;

Fig. 2

a side view of an eccentric tool for releasing the locking of the locking element with the actuating element;

Fig. 2A

an enlarged, the tip of the eccentric comprehensive cutout Fig. 2 ;

Fig. 3

a perspective view of the lock element according to the invention with suitable for mounting a door knob actuators, and

Fig. 4

a view of a locking portion of the locking element according to the invention with perpendicular to the longitudinal center plane of the lock element extending viewing direction.

The in Fig. 1 Lock body 2 shown has the outer shape of a profile cylinder. Approximately in the middle of the lock body 2 is located in the illustrated embodiment, a rotatable relative to the lock body closing element 4 with a cam 6 at its lower end. In other embodiments, the closing element may also be arranged asymmetrically in the lock body. The illustrated lock element 2 has two actuating elements 8, 8 'suitable for mounting a door knob, respectively, at its two opposite ends. When the lock body 2 is mounted on a door, the right side operating member 8 'is located on the inside of the door and the left side operating member 8 is on the outside of the door. In the following, therefore, the castle side lying on the right side of the figures in the figures, and the side lying on the left in the figures, are referred to as outside of the shell. The left, lying on the outside of the lock actuator 8 is suitable for mounting a door knob, for example. On its side facing the lock body 2, it has a cylindrical attachment portion 9, which is located inside the cylindrical cavity 3 in the interior of the lock body 2. At its end located in the cavity 3, this actuating portion 9 has a conical taper 5 or at least one circumferential chamfer and then merges into a shaft 18, which is centrally in a cylindrical cavity 3 (see Fig. 1B ) is arranged in the middle of the cylindrical upper region of the lock body 2 and is rotatably mounted in the lock body 2. The shaft 18 extends into the lying on the inside of the door actuator 8 ', with which they can make a coupling not described in detail here. As in the Fig. 1A and 1B can be seen, both the attachment portion 9 and the shaft 18, in which it merges, a cylindrical cavity 19. This can extend over the entire length of the shaft 18 and the fastening portion 9 from the actuating element 8 to the opposite actuating element 8 ', so that, for example, cables can be passed through it. Although in the illustrated embodiment, the shaft 18 is integrally formed with the mounting portion 9, but it is also possible to non-rotatably connect a separate shaft with the mounting portion 9.

In the lower elongate portion of the lock body 2, a bore 20 is formed perpendicular to the longitudinal center plane, which serves for fastening of the lock element in a door by means of a not shown forend screw.

In Fig. 1A the mechanism for locking the actuating element 8 in the cavity 3 of the lock body 2 is shown enlarged. The Fig. 1A and 1B each show the same section of the lock element 2. The in the Fig. 1 shown latched state is in the Fig. 1A shown while in the Fig. 1B the actuator 8 is only partially inserted into the cavity 3 of the lock body 2 and not yet latched to the locking element 10.

In Fig. 1A can recognize the locking element 10, which is guided in a guide track 32 in the interior of the lock body 2, and radially to the axis m (see. Fig. 1 ) of the cylindrical attachment portion 9 can be moved. At its top, the locking element 10th a locking portion 16, which in more detail in Fig. 4 is shown. The locking portion 16 is held by a bolt-like fastening element 34 in the locking element 10.

The attachment portion 9 of the actuating element 8 has a circumferential circumferential groove 24 throughout. The locking portion 16 of the locking element 10 is seated in this groove 24, so that although the actuating element 8 is rotated about the axis m, but can not be moved in the axial direction.

A spring 22 is arranged in a recess 30, which is round in cross section, in the interior of the latching element 10, the cross section of the cutout 30 essentially corresponding to the diameter of the spring 22. The recess 30 is open at the bottom; the spring 22 is supported at its lower end on a pin 14 which is inserted perpendicular to the longitudinal center plane of the lock body 2 by the lower, elongated area. The pin 14 is held in a circular bore of the lock body 2, which has the same diameter as the pin 14. At the same time, the pin 14 extends through a slot 15 in the locking element 10, which allows a radial displacement of the locking element 10. By the interaction of slot 15 and pin 14, the radial displacement of the locking element 10 is limited up and down. In Fig. 1A the spring is relaxed and pushes the locking element 10 upwards and thus the locking element 16 in the groove 24. The pin 14 touches in this position, the upper end of the elongated hole 15th

In Fig. 1B is the cylindrical mounting portion 9 of the actuating element 8 is not fully inserted into the cavity 3 of the lock body 2.

The attachment portion 9 has according to Fig. 1B on its protruding into the lock body 2 end face 9 'a conical taper 5. When inserting the actuating element 8 with its mounting portion 9 in the cavity 3, the locking element 10 is pressed down by the tapered surface on the front of the mounting portion 9 and thus compresses the spring 22, as in Fig. 1B shown. When the actuator 8 is inserted into the cavity 3 until it stops, the latching element 10 engages with its locking portion 16 with the groove 24 in engagement. The spring 22 relaxes and the actuator is as in Fig. 1A shown locked with the lock body.

Furthermore, one can in the Fig. 1A and 1B Holes 12 and 28 recognize which serve to release the explained locking. A bore 12 in the lock body 2 and a bore 28 in the locking element 10 each have the same diameter d and both extend parallel to the axis m of the cylindrical mounting portion 9. The bore 12 extends in the illustrated embodiment of the locking element 10 to the lying on the lock inside Alternatively, however, it can also extend over the entire length of the lock body 2 and be closed on the outside of the lock, for example by means of a steel pin. With compressed spring 22 ( Fig. 1B ) are the bore 12 in the lock body 2 and the bore 28 in the locking element 10 aligned with each other and thus form a continuous cylindrical bore. When the locking element 10 is locked to the actuating element 8, that is, when the spring as in Fig. 1A is relaxed, the two holes 12, 28 are offset from each other and overlap about half their diameter d.

To release the locking the eccentric tool 40 is used. In the Fig. 1 . 1A and 1B an eccentric tool 40 can be seen, which is inserted from the inside of the lock through the bore 12 and into the bore 28. In the Fig. 2 and 2A the tool is shown alone. Such a tool consists of a handle 37 and a metal rod 36 with a round cross-section, wherein the diameter of the rod 36 at its end face 35 must correspond approximately to the diameter d of the holes 12, 28 in the lock body 2 and in the locking element 10. At this end face 35 of the tool, a smaller cylinder extension 38 is arranged eccentrically, the diameter of the maximum overlap of the two holes 12, 28 in the in Fig. 1A shown state of the lock element may correspond. The rod 36 has viewed from its front side 35 from only a short portion of its length d its maximum diameter and then tapers to form a shoulder on the diameter d '. By this shape of the rod 36 curvatures of the bore 12 can be compensated within a certain framework. Through the bore 12 in the lock body through the eccentric tool 40 can be inserted from the inside of the lock with a relaxed spring 22 with its cylinder extension 38 in the bore 28 in the locking element 10 ( Fig. 1A ). When the tool is now rotated, the locking element 10 is pulled down by the cylinder extension 40 and the connection between the actuating element 8 and the lock body 2 is thus released, so that the actuating element 8 can be pulled out of the cavity 3 in the lock body 2 ( Fig. 1B ). How to best in the Fig. 1 detects the bore 20 for the forend screw, not shown, partially through the lock body bore 12, so that the eccentric tool 40 can not be inserted through the hole 12 screwed screw, but the forend must first be removed, which is an additional anti-tampering.

In Fig. 3 the lock element 2 is shown in perspective. By the downwardly open guide track 32, the locking element 10 with the downwardly open recess 30 in its center can be seen. Above the pin 14 can be seen, which serves as a stop element and at the same time in Fig. 2 invisible spring 22 is supported. The locking portion 16 of the locking element 10 is located in a slot-like recess of the lock body 2 perpendicular to its longitudinal center plane.

In Fig. 4 the locking portion 16 of the locking element 10 is shown enlarged. The locking region 16 is a flat metal part whose surface lies substantially perpendicular to the axis m of the cylindrical fastening section 9. At its lower end, the locking portion 16 has a bore 17 through which a bolt for fixing the locking portion 16 in the locking element 10 can be inserted. The locking portion 16 of the locking element 10 is narrower in a direction perpendicular to the longitudinal center plane of the lock member direction than the lower portion of the lock body 2. Above this range, the locking portion 16 extends laterally in said direction and then has a greater width than the lower portion of the lock body 2. At its upper end, the locking portion 16 is sickle-shaped, so that it is complementary to the annular groove 24 in the mounting portion 9 and at the same time does not protrude beyond the outer contour of the lock body 2.

LIST OF REFERENCE NUMBERS

2

lock body

3

cylindrical cavity

4

closing element

5

conical rejuvenation

6

Cam

8th

actuator

8th'

actuator

9

cylindrical attachment section

9 '

End face of the cylindrical attachment portion

10

locking element

12

drilling

14

pen

15

Long hole

16

locking area

17

Bore in the locking area

18

wave

19

cavity

20

Mounting hole for forend screw

22

feather

24

groove

28

drilling

30

recess

32

guideway

34

fastener

35

End face of the metal rod 36

36

metal rod

37

Handle

38

Cylindrical extension

40

Exzenterwerkzeug

d

Diameter of the holes 12 and 28

d '

Diameter of the metal bar 36

m

Axis of the cylindrical attachment portion 9

Claims (11)

1. A lock element having a lock body (2), an actuation element (8), a closing element (4) rotatable with respect to the lock body (2), a hollow space (3) which extends into the lock body (2) and in which the actuation element (8) couplable with the closing element (4), rotatable with respect to the lock body (2) and disposed at an outer side of the lock is releasably fastenable to a cylindrical fastening section (9), with the fastening section (9) of the actuation element (8) having a peripheral groove (24) extending continuously around it, the groove being able to be latched to a latching element (10) which is displaceably guided in the lock body (2) radially to the axis (m) of the cylindrical fastening section (9) and is loaded by means of a spring (22) in the direction of the groove (24) of the actuation element (8), with the lock body (2) having a bore (12) which extends from the end of the lock body (2) disposed at an inner side of the lock at least up to the latching element (10) journalled in the lock body (2), and with the latch connection being releasable by a tool pushed through the bore (12) from the inner side of the lock.
2. A lock element in accordance with claim 1, characterised in that the fastening section (9) has a conical converging portion (5) at its end projecting into the lock body, said converging portion enabling a displacement of the latching element (10) against the spring tension on the introduction of the actuation element (8) into the hollow space (3) of the lock body (2).
3. lock element in accordance with claim 1 or claim 2, characterised in that the latching element (10) is guided along a guide track (32) extending within the lock body (2), with its movement being bounded by means of abutment elements (14, 15) in two opposite directions extending radially to the axis (m) of the cylindrical fastening section (9), with the abutment elements (14, 15) in particular being realised by means of an elongated hole (15) provided in the latching element (10) and by means of a pin (14) provided at the lock body side and extending through the elongated hole (15).
4. A lock element in accordance with claim 3, characterised in that the spring (22) is arranged in a cut-out (30) of the latching element (10) extending radially to the axis (m) of the cylindrical fastening section (9), with the pin (14) forming a support element for the spring (22) with its region extending into this cut-out (30).
5. A lock element in accordance with any one of the preceding claims, characterised in that the latching element (10) has a bore (28) which has at least substantially the same diameter (d) as the bore (12) at the lock body (2), with both bores (12, 28) extending parallel to the axis (m) of the cylindrical fastening portion (9); and in that the two bores (12, 28) are mutually aligned with a compressed spring (22) and overlap section-wise with a relaxed spring (22), with in particular a bore (20) for a cylinder fixing screw extending at least partly through the bore (12) at the lock body side.
6. A lock element in accordance with claim 5, characterised in that the bore (12) at the lock body side extends over the total length of the lock body in the direction of the axis (m) of the cylindrical fastening section (9) and is closed at the outer side of the lock.
7. A lock element in accordance with one of the claims 5 or 6, characterised in that the diameter (d) of the two bores (12, 28) extending parallel to the axis (m) of the cylindrical fastening section (9) in the lock body (2) and in the latching element (10) in each case amounts to between 2 mm and 5 mm, in particular approximately 3 mm, and the two bores (12, 28) overlap by approximately half of their diameters (d) with a relaxed spring (22).
8. A lock element in accordance with any one of the preceding claims, characterised in that it has a shaft (18) which is rotatably journalled centrally in the hollow space (3) of the lock body (2) and which is rotationally fixedly connected to the actuation element (8) at one end, whereas a second actuation element (8') has a mount for the other end of the shaft (18).
9. A lock element in accordance with any one of the preceding claims, characterised in that the lock body (2) has the form of a profile cylinder.
10. A lock element in accordance with claim 3 and claim 9, wherein the profile cylinder consists of an upper section with a cylindrical cross-section and a lower section with an elongated cross-section, characterised in that the region of the latching element (10) guided in the lower section of the profile cylinder is narrower than the lower section of the profile cylinder in a direction extending perpendicular to the longitudinal centre plane of the lock element (2); and in that the latching element (10) has a latching region (16) above this region which fits into the peripheral groove (24) of the fastening section (9) and which has a larger width than the lower section of the profile cylinder in the named direction.
11. A tool for the unlatching of a latching element (10) for a lock element in accordance with claim 6, having a grip (37) and a bar (36) which is connected thereto and can be introduced into the bore (12) at the lock body side and whose end remote from the grip (37) forms an eccentric prolongation (38) whose cross-section is smaller than that of the bar (36) at its end having the prolongation (38), with the cross-section of this end approximately corresponding to the cross-section of the bore (12) at the lock body side, with the cross-section of the bar (36) being smaller at its end having the prolongation (38) over a large part of its length.

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