Lock cylinder with clutch

Abstract

The invention relates to a locking cylinder with a coupling. The locking cylinder has a cylinder housing in which a cylinder core (10) is rotatably arranged, which can be coupled to the locking bit or a coupling pressure piece via the coupling by means of a key inserted into its keyway (11). The coupling comprises a coupling actuator (20) which is mounted longitudinally displaceably in the cylinder core (10) and establishes the connection to the locking bit or coupling pressure piece (30). The cylinder core (10) has two opposing and corresponding guide slots, in each of which one end of a return pin (40) is guided. The return pin (40) is guided through at least one guide (21) of the coupling actuator (20). The return pin (40) has an engagement region (41) which can be brought into engagement with a recess in the key in such a way thatthat the engagement area (41) of the return pin (40) engages in the recess when the key is inserted and the front key geometry of the key engages in a contact surface of the clutch actuator (20) corresponding to the front key geometry and when the key is further advanced, the front key geometry pushes the clutch actuator (20) towards the locking bit or clutch pressure piece (30) and when the key is withdrawn, the return pin forcibly moves the clutch actuator (20) from its holding position to its starting position through the guide (21) out of the recess on the key and releases the key.

Description

[0001] The invention relates to a locking cylinder with a coupling according to the features of the preamble of claim 1.

[0002] A coupling for a locking cylinder is known from EP 2 917 440 B1. A cylinder core is rotatably arranged in the housing of the locking cylinder and can be coupled to the locking bit via the coupling by means of an inserted key. The coupling has a coupling element and a coupling cover. A guide is provided in the coupling element in which a return piece can be slidably guided. The return pin is arranged integrally with the coupling cover. The return pin itself has a driver at one end and a nose at the other end. The nose is passed through the coupling element and can be engaged with a recess in the key. When the key is inserted, the nose is carried along, so that the coupling cover can be moved longitudinally relative to the coupling element.Because the return pin is formed as one piece with the clutch cover, this component is particularly complex to manufacture and expensive to produce.

[0003] It is therefore the object of the present invention to provide a locking cylinder with a coupling, wherein the coupling is easier to manufacture and cheaper to produce, while maintaining the same or improving the function.

[0004] This object is achieved according to the invention by a locking cylinder with a coupling having the features of claim 1.

[0005] According to the invention, a locking cylinder with a coupling is provided, wherein the locking cylinder has a cylinder housing in which a cylinder core is rotatably arranged, wherein the cylinder core can be coupled to the locking bit or a coupling pressure piece by means of a key inserted into its key channel via the coupling, and wherein the coupling comprises a coupling actuator which is mounted in the cylinder core so as to be longitudinally displaceable and establishes the connection to the locking bit or coupling pressure piece.

[0006] It is essential that the cylinder core has two opposing and corresponding guide slots, in each of which one end of a return pin is guided, and the return pin is guided through at least one guide of the clutch actuator, wherein the return pin has an engagement area which can be brought into engagement with a recess of the key in such a way thatthat the engagement area of ​​the return pin engages in the recess when the key is inserted and the front key geometry of the key engages in a contact surface of the clutch actuator corresponding to the front key geometry and when the key is further advanced, the front key geometry pushes the clutch actuator towards the locking bit or clutch pressure piece and when the key is withdrawn, the return pin forcibly moves the clutch actuator from its holding position to its initial position through the guide out of the recess on the key and releases the key.

[0007] The problem is also solved by a lock-key system having the features of claim 14.

[0008] According to the invention, a lock-key system comprising a key and a locking cylinder with a clutch is provided. It is essential that, when the key is inserted, the return pin engages the recess in the key and the front key geometry of the key engages a contact surface of the clutch actuator corresponding to the front key geometry. Upon further advancement of the key, the front key geometry pushes the clutch actuator toward the locking bit or clutch pressure piece. Upon retraction of the key, the return pin forcibly moves the clutch actuator from its holding position to its initial position through the guide out of the recess in the key, releasing the key.

[0009] The locking cylinder and the lock-key system according to the invention provide a functionally reliable coupling that also requires little manufacturing effort. Compared to the prior art, the coupling mechanism is simplified by the return pin, thus ensuring the necessary operational reliability. This also ensures that the cylinder core and the locking bit or coupling pressure piece are decoupled when the key is removed. Thus, the locking cylinder is always decoupled when the key is removed.

[0010] Preferably, the locking cylinder can comprise the coupling, in particular with a coupling pressure piece, as well as a locking bit.

[0011] In particular, the return pin is provided with thickened sections at both ends. Preferably, the thickened ends of the return pin interact with the guide slots of the cylinder core.

[0012] The diameter of the thickened sections of the return pin may be 0.05 mm to 0.15 mm smaller than the width of the guide slot of the cylinder core. The thickened sections of the return pin are preferred because they allow the use of a wider slot in the slot in the core. This slot can then be manufactured with a wider, more stable milling cutter, ensuring the dimensional accuracy of the slot. This also reduces manufacturing costs. Furthermore, the return pin can be moved smoothly in the guide slot, and at the same time, the play between the guide slot and the return pin is so small that the functionality of the coupling is always guaranteed.

[0013] Furthermore, it is preferably provided that the engagement region of the return pin is arranged between the two ends.

[0014] It may also be possible for the engagement area to be thinner than the two ends of the return pin.

[0015] Advantageously, the return pin can interact with a spring that presses the return pin into the key recess when the key is inserted. It is also possible for the spring to constantly press the return pin against an outer contour of the key. This ensures that the return pin follows the key contour when the key is inserted into the keyway and can also be pressed into the key recess accordingly.

[0016] Preferably, the clutch actuator comprises two opposing and corresponding guides, with a groove formed between the two guides, in particular with the spring arranged in the groove. The design with two opposing and corresponding guides and the spring arranged between the two guides improves the functional reliability of the return mechanism.

[0017] It may also be possible for the at least one guide or the two guides to extend substantially radially within the cylinder core, in particular so that they extend from the keyway toward the cylinder housing. Preferably, the at least one guide or the two guides are each an elongated hole, in particular a linear elongated hole.

[0018] In particular, it is provided that one end of the spring is arranged in direct contact with a stop located in a recess of the clutch actuator and / or the other end of the spring is arranged in direct contact with the return pin. It may also be possible for the stop of the groove to have a lug or a pin configured to correspond to a recess in the spring or the hole in the spring, so that the spring is securely positioned at the stop in the groove.

[0019] The spring is preferably a compression spring. The compression spring preferably ensures that the return pin can always be pressed against the side surface of the key. Furthermore, the spring can be made of a material selected from: steel, hardened steel, spring bronze, or copper beryllium. However, any other material that has good spring properties and is not subject to severe corrosion is also conceivable.

[0020] It may also be possible for the at least one guide to have an upper end and a lower end, in particular with the upper end being larger than the lower end. The upper end may, for example, be a bore with a larger diameter than the width of the guide. Furthermore, the bore may also have a larger diameter than the thickened sections of the return pin. The upper end is preferably understood to mean the side of the guide facing the cylinder housing. The lower end is preferably understood to mean the side of the guide facing the keyway. It may also be possible for each of the two opposite and corresponding guides to have an upper end and a lower end, in particular with the upper end being larger than the lower end. This measure allows the return to be mounted in a simple manner.During assembly, the return pin can first be inserted through the hole at the upper end and then moved toward the lower end, allowing the spring to be positioned between the stop and the return pin. The thickened portions of the return pin preferably have a diameter that is larger than the width of at least one guide, and in particular of the lower end of the guide of the clutch actuator. This holds the return pin in position relative to the clutch actuator.

[0021] Furthermore, it is possible for the guide slots of the cylinder core to be formed from two end sections and a central section, with the central section running axially, in particular parallel, to the keyway, and the two end sections running laterally to the keyway. When the key is inserted or removed into or from the keyway, the return pin is displaced by the key flank. In this case, the return pin is forced into one of the end sections of the guide slot. This also means that the return pin moves in the guide of the clutch actuator from the lower end towards the upper end. However, as soon as the return pin is pressed into the recess of the key by spring action, the return pin is located in the central section of the guide slot, or where one end section merges into the central section. This meansThe return pin is now pressed by the spring from the upper end to the lower end of the clutch actuator guide. As the key is further inserted or removed, the return pin is carried along by the key along the central section, so that it reaches the other end of the guide slot. At the same time, the return pin ensures that the clutch actuator is forcibly moved from its pre-positioned position to its original position when the key is removed, thereby disengaging the clutch actuator from the locking cam or clutch pressure piece. As the key is further inserted into the keyway, however, the clutch actuator is pushed along by the front tip geometry to the locking cam or clutch pressure piece, where it is engaged accordingly.

[0022] Furthermore, the return pin can be made of steel or hardened steel. Hardened steel, in particular, generates very little abrasion due to friction, which significantly increases the service life of the clutch and the locking cylinder.

[0023] It can also be provided that the diameter of the engagement area of ​​the return pin is 0.05 mm to 0.15 mm smaller than the width of the clutch actuator guide. This ensures that the return pin can be moved smoothly within the clutch actuator guide while also exhibiting minimal play, thus ensuring the functionality of the clutch at all times.

[0024] The locking cylinder according to the invention and the lock-key system according to the invention are preferably used in escape route doors where a freely rotating locking cam is required. In these locking cylinders, the locking cam must be decoupled from the blocked core in the event of danger or activation. Furthermore, the coupling function can be used to force the resetting of mechanical or electromechanical components in the cylinder core. This allows the locking cylinder to be repeatedly reset to a defined state and provides the same initial conditions for each new locking operation. The return pin thus ensures that the coupling is guaranteed to be separated from the locking cam when the key is removed. Furthermore, the locking cylinder according to the invention and the lock-key system according to the invention can also be used in any door.

[0025] The invention will be explained below using several exemplary embodiments with the aid of the accompanying drawings. The exemplary embodiments shown are therefore not to be construed as limiting. In the drawings: Fig. 1: a schematic representation of a cylinder core in a sectional view; Fig. 2: a schematic representation of a clutch actuator; Fig. 3: a schematic representation of a return pin.

[0026] In The figures illustrate various examples of embodiments of the invention. Identical or equivalent components have been provided with the same reference symbols. Where the embodiments illustrated in the figures have common features, these common features have not been described multiple times to avoid repetition. The respective differences between the embodiments are described in relation to the figures. It goes without saying that a person skilled in the art can modify individual embodiments or combine individual features of these embodiments within the scope of the claims.

[0027] Fig. 1 shows a schematic representation of a cylinder core 10 in a sectional view. The cylinder core 10 is preferably rotatably mounted in a cylinder housing (not shown) of a locking cylinder. Furthermore, a coupling pressure piece 30 is arranged adjacent to the cylinder core 10. The cylinder core 10 can be coupled to the coupling pressure piece via the coupling by means of a key inserted into its keyway 11. Instead of a coupling pressure piece 30, the cylinder core 10 can also be coupled to a locking bit. As shown in Fig. 1 As can be seen, the clutch comprises a clutch actuator 20, which is mounted in the cylinder core 10 for longitudinal displacement and establishes the connection to the clutch pressure piece 30. Furthermore, the cylinder core 10 has two opposing and corresponding guide slots (not shown), in each of which one end of a return pin 40 is guided. As shown in Fig 1 As shown, the return pin 40 is guided through at least one guide 21 of the clutch actuator 20.

[0028] The Figur 1 used feedback pin 40 is in Figur 3 shown schematically. The return pin 40 according to Fig. 3 has an engagement area 41 which can be brought into engagement with a recess of the key in such a way that the engagement area 41 of the return pin 40 engages in the recess when the key is inserted and the front key geometry of the key engages in a contact surface of the clutch actuator 20 corresponding to the front key geometry and when the key is further advanced, the front key geometry presses the clutch actuator 20 to the locking bit or clutch pressure piece 30 of the Fig. 1 and when the key is withdrawn, the return pin forcibly moves the clutch actuator 20 from its holding position into its initial position through the guide 21 out of the recess on the key and releases the key.

[0029] As in Fig. 3 As can be seen, the return pin 40 has thickened sections 42 at both ends. These thickened sections 42 preferably interact with the two guide slots (not shown) of the cylinder core 10. Advantageously, the diameter of the thickened sections 42 of the return pin 40 is 0.05 mm to 0.15 mm smaller than the width of the guide slots of the cylinder core 10.

[0030] As in Fig. 3 As can be seen, the engagement portion 41 of the return pin 40 is arranged between the two ends. According to this embodiment, the engagement portion 41 is thinner than the two ends of the return pin 40.

[0031] As in Fig. 1 As shown, a spring 50 is provided, which interacts with the return pin 40 and presses the return pin 40 into the key recess when the key is inserted. This is preferably a compression spring. Advantageously, the spring 50 always presses the return pin 40 against an outer contour of the key. This ensures that the return pin 40 can also securely engage in the key recess.

[0032] In Fig. 2 The clutch actuator 20 is shown in a schematic spatial diagram. The clutch actuator 20 according to Fig. 2 has two opposite and corresponding guides 21, wherein a groove is formed between the two guides 21. It is preferably provided that the spring 50 is arranged in the groove. In the Fig. 1 In the embodiment shown, one end of the spring 50 is arranged in direct contact with a stop located in a recess of the clutch actuator 20 and the other end of the spring 50 is arranged in direct contact with the return pin 40.

[0033] As in Fig. 2 As shown, the at least one guide 21 has an upper end 22 and a lower end 23, wherein the upper end 22 is larger than the lower end 23. The thickening of the upper end 22 can, for example, be, as shown in Fig. 2 shown, a bore. Preferably, the bore has a diameter that is larger than the diameter of the thickened sections 42 of the return pin 40. This measure allows the return pin 40 to be easily inserted through the bore of the guide 21 for assembly. List of reference symbols

[0034] 10Cylinder core 11Key channel 20Clutch actuator 21Guide 22Upper end 23Lower end 30Clutch pressure piece 40Return pin 41Engagement area 42Thickened section 50Feather

Claims

1. Locking cylinder with coupling, wherein the locking cylinder has a cylinder housing in which a cylinder core (10) is rotatably arranged, wherein the cylinder core (10) can be coupled to a locking bit or a coupling pressure piece by means of a key inserted into its key channel (11) via a coupling, and wherein the coupling comprises a coupling actuator (20) which is mounted in the cylinder core (10) so as to be longitudinally displaceable and establishes the connection to the locking bit or coupling pressure piece (30), characterized by thatthe cylinder core (10) has two opposing and corresponding guide slots, in each of which one end of a return pin (40) is guided, and the return pin (40) is guided through at least one guide (21) of the clutch actuator (20), wherein the return pin (40) has an engagement area (41) which can be brought into engagement with a recess of the key in such a way,that the engagement area (41) of the return pin (40) engages in the recess when the key is inserted and the front key geometry of the key engages in a contact surface of the clutch actuator (20) corresponding to the front key geometry and when the key is further advanced, the front key geometry pushes the clutch actuator (20) towards the locking bit or clutch pressure piece (30) and when the key is withdrawn, the return pin forcibly moves the clutch actuator (20) from its holding position to its starting position through the guide (21) out of the recess on the key and releases the key.

2. Lock cylinder according to claim 1, characterized by that the return pin (40) has thickened sections (42) at both ends.

3. Lock cylinder according to claim 2, characterized by thatthe diameter of the thickened sections (42) of the return pin (40) is 0.05 mm to 0.15 mm smaller than the width of the guide slots of the cylinder core (10).

4. Lock cylinder according to one of the preceding claims, characterized by that the engagement region (41) of the return pin (40) is arranged between the two ends.

5. Lock cylinder according to one of the preceding claims, characterized by that the engagement area (41) is thinner than the two ends of the return pin (40).

6. Lock cylinder according to one of the preceding claims, characterized by that the at least one guide (21) cooperates with the engagement region (41) of the return pin (40).

7. Lock cylinder according to one of the preceding claims, characterized by thatthe return pin (40) cooperates with a spring (50) which presses the return pin (40) into the recess of the key when the key is inserted.

8. Lock cylinder according to claim 7, characterized by that the spring (50) always presses the return pin (40) against an outer contour of the key.

9. Lock cylinder according to one of the preceding claims characterized by that the clutch actuator (20) has two opposite and corresponding guides (21), wherein a groove is formed between the two guides (21), in particular wherein the spring (50) is arranged in the groove.

10. Lock cylinder according to one of claims 7 to 9, characterized by thatone end of the spring (50) is arranged in direct contact with a stop located in a recess of the clutch actuator (20) and / or the other end of the spring (50) is arranged in direct contact with the return pin (40).

11. Lock cylinder according to one of the preceding claims, characterized by that the at least one guide (21) has an upper end (22) and a lower end (23), in particular wherein the upper end (22) is larger than the lower end (23).

12. Lock cylinder according to one of the preceding claims, characterized by that the guide slots of the cylinder core (10) are each formed from two end sections and a central section, wherein the central section runs axially, in particular parallel, to the key channel (11) and the two end sections run laterally to the key channel (11).

13. Lock cylinder according to one of the preceding claims, characterized by that the diameter of the engagement area (41) of the return pin (40) is 0.05 mm to 0.15 mm smaller than the width of the guide (21) of the clutch actuator (20).

14. Lock-key system comprising a key and a locking cylinder with a coupling according to one of the preceding claims, characterized by thatwhen the key is inserted, the return pin (40) engages in the recess of the key and the front key geometry of the key engages in a contact surface of the clutch actuator (20) corresponding to the front key geometry and when the key is advanced further, the front key geometry pushes the clutch actuator (20) towards the locking bit or clutch pressure piece (30) and when the key is withdrawn, the return pin forcibly moves the clutch actuator (20) from its holding position into its starting position through the guide (21) out of the recess on the key and releases the key.

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