Spring ring for a bayonet coupling of a lock cylinder

Abstract

The subject matter of the invention relates to a spring ring (10), in particular a spring ring (10) for a bayonet catch (70) of a locking cylinder, in particular an electromechanical locking cylinder, comprising an annular body (11) which has at least one outwardly facing guide tab (12) for engaging in a guide (51) of a corresponding knob sleeve (50), which has at least one inwardly facing engagement tab (13) for a guided arrangement on a knob flange (30), and which has at least one inwardly projecting, outwardly resilient spring arm (14) in order to snap into a corresponding snap-in receptacle of the knob flange (30). The subject matter of the invention further relates to a knob flange (30), a knob sleeve (50), a bayonet catch (70), a locking cylinder, an electromechanical locking cylinder set, and a method therefor.

Description

[0001] The invention relates to a spring ring, in particular a spring ring for a bayonet closure of a locking cylinder, in particular an electromechanical locking cylinder according to claim 1.

[0002] Furthermore, the invention relates to a knob flange, in particular a knob flange for a bayonet closure of a locking cylinder, in particular an electromechanical locking cylinder, for cooperation with a spring ring according to claim 3.

[0003] Furthermore, the invention relates to a knob sleeve, in particular a knob sleeve for a bayonet closure of a locking cylinder, in particular an electromechanical locking cylinder, for interaction with a spring ring and / or a knob flange according to claim 4.

[0004] Furthermore, the invention relates to a bayonet lock for a locking cylinder, in particular for an electromechanical locking cylinder for connecting a knob sleeve of a rotary knob to a knob flange according to claim 6.

[0005] The invention also relates to a locking cylinder, in particular an electromechanical locking cylinder, comprising at least one rotary knob and a locking mechanism according to claim 7.

[0006] Furthermore, the invention relates to an electromechanical locking cylinder set, comprising at least one locking cylinder and at least one tool according to claim 8.

[0007] Last but not least, the invention relates to a method for assembling a rotary knob, in particular a rotary knob of a locking cylinder according to claim 9.

[0008] Electromechanical locking cylinders or door locks with a rotary knob for operating a locking mechanism are commonplace. The rotary knob houses the power source in its knob sleeve. To change the power source, usually a battery, the knob sleeve must be removed from the knob electronics. This process is often complex and involves lengthy work steps.

[0009] EP 2 706 172 A2, for example, discloses a locking device comprising a locking cylinder with at least one cylinder core rotatable in a locking cylinder housing and a locking member, at least one handle, connecting means for mechanically and electrically releasably connecting the handle to the cylinder core, and electronic access control means. This device is characterized in that the connecting means comprise a threaded connection between the cylinder core and the handle, wherein the threaded connection has a positive-locking anti-twist feature in the form of axial recesses arranged on the cylinder core or the handle, into which projections formed on the other part can axially engage when the threaded connection is screwed on.

[0010] Such locking cylinders require a lot of time for assembly and disassembly.

[0011] It is therefore an object of the present invention to provide a spring ring, a knob flange, a knob sleeve, a bayonet lock, a locking cylinder, an electromechanical locking cylinder set and a method which have a high functionality with reduced assembly effort.

[0012] These and other objects are achieved based on a spring ring according to claim 1, a knob flange according to claim 3, a knob sleeve according to claim 4, a bayonet closure according to claim 6, a locking cylinder according to claim 7, an electromechanical locking cylinder set according to claim 8, and a method according to claim 9. Advantageous developments of the invention are specified in the dependent claims.

[0013] The invention includes the technical teaching that in a spring washer, in particular a spring washer for a bayonet lock of a locking cylinder, in particular an electromechanical locking cylinder, comprising an annular body which has at least one outwardly facing guide tab for engagement in a guide of a corresponding knob sleeve, which has at least one inwardly facing engagement tab for a guided arrangement on a knob flange, at least one inwardly projecting, outwardly resilient spring arm is provided in order to realize latching in a corresponding latching receptacle of the knob flange. The spring washer is preferably formed in one piece. The spring washer is manufactured as an annular disk with a constant spring washer thickness, i.e. with a constant thickness in an axial direction.The spring ring thus forms two end faces in the axial direction and an inner and an outer circumferential wall or circumferential side - inside and outside. The spring ring has an annular body. This has at least one engagement tab, preferably two engagement tabs, pointing radially inward. The two engagement tabs are opposite one another and are therefore offset by 180° to one another. Other angles and a different number of engagement tabs are possible in other embodiments. The engagement tabs are preferably tapered radially inward, but can also have other shapes. In extension to the engagement tabs, the annular body has a guide tab for each engagement tab pointing outwards. The guide tabs can be offset from the engagement tabs in other embodiments. The guide tabs are preferably designed to widen outwards.Other shapes are conceivable in other embodiments. On the outside, the radially outer side, of the annular body, indentations are provided next to the guide tabs. On the inside, the radially inner side, the annular body has at least one spring arm, preferably two spring arms. These are arranged offset from the engagement tabs and / or the guide tabs. The spring arm is realized by a one-sided open recess in the annular body. Due to the thinning of the material / recess, the spring arm is designed to be springy in the radial direction. At the open end, each spring arm has a locking lug that projects radially inward relative to the rest of the spring arm. In this way, a locking mechanism with complementary components, in particular the locking receptacle of the knob flange, can be realized.

[0014] In one embodiment, it is alternatively or additionally provided that the at least one spring arm has at least one inwardly projecting locking lug at its end. The locking lug extends over a portion of the spring arm and is formed at the open end of the spring arm. The locking lug protrudes radially inward and is designed to cooperate with a knob flange. The thickness of the spring ring is selected such that at least the tabs achieve a spring effect while maintaining sufficient strength.

[0015] The invention also includes the technical teaching that in a knob flange, in particular a knob flange for a bayonet lock of a locking cylinder, in particular an electromechanical locking cylinder, for interaction with a spring washer, in particular a spring washer described here, it is provided that the knob flange has an annular body which has an axially projecting extension on one end face for receiving a spring washer, which has a flange section remote from the annular body with at least one passage opening for a corresponding engagement tab of the spring washer and which has a latching section or a latching receptacle between the annular body and the flange section with at least one projection projecting laterally or radially outwards and / or at least one recess projecting laterally or radially inwards for latching interaction with the corresponding spring arm,in particular the corresponding locking lug of the spring washer. The knob flange has an annular body. In the axial direction, the knob flange is thicker than the spring washer. On one end face, the annular body is designed to interact with the spring washer. For this purpose, the annular body has an axially extending extension on the end face. The extension is also annular and does not protrude radially inward into the interior, so that this interior runs through the extension without offset from the annular body. The extension has a flange section remote from the annular body, which has a divided projection or several projections radially inward, so that an undercut is formed between the annular body and the axially outer end face of the extension. So that the spring washer can engage behind the undercut with the engagement tabs,The flange section has a complementary opening for each engagement tab. The opening is dimensioned such that a corresponding engagement tab can be guided axially through it. Only when the engagement tabs and openings are aligned can the spring washer be pushed over the flange section toward the ring body of the knob flange onto the extension and secured there by engaging in the undercut by a corresponding rotation. To prevent the engaging spring washer from accidentally coming loose, additional locking sections or locking receptacles are provided between the ring body and the flange section, at least for each locking lug. The locking sections are designed to interact with the locking lug and have a radially outwardly projecting shoulder or projection and / or a radially inwardly projecting recess or depression. When the spring washer is rotated, the locking lug and thus the spring arm are pressed radially inward.so that the locking lug can pass the projection. After passing the projection, the locking lug springs back and engages behind the projection and / or in the recess. To release the locking, the locking lug must be moved radially inward. This is possible using a special tool that engages with the designated recesses in the spring washer. On the end face facing away from the flange section, the knob flange can be connected to the locking mechanism. The end face facing the flange section and the outer peripheral wall are designed for a twist-proof connection to the knob sleeve. The connection between the knob sleeve, spring washer, and knob flange is designed as a bayonet connection.

[0016] The invention also includes the technical teaching that in a knob sleeve, in particular a knob sleeve for a bayonet lock of a locking cylinder, in particular an electromechanical locking cylinder, for interacting with a spring ring, in particular a spring ring described here and / or a knob flange, in particular a knob flange described here, the knob sleeve has a profile on the inside, in particular a guide, with a front-side flange section which has at least one axial opening for the passage of the corresponding guide tab of the spring ring, and an undercut section adjoining it in the direction of the opposite front side, in which the corresponding guide tab engages after being passed axially through the opening and rotated about the longitudinal axis, thus rotating in the circumferential direction.The knob sleeve, knob flange, and spring washer together form the bayonet lock. First, the spring washer is connected to the knob flange. Then, the spring washer is aligned so that its guide tabs are aligned with the corresponding openings in the knob sleeve. A corresponding opening is provided for each guide tab. The knob sleeve is moved axially over the spring washer and the knob flange, and the spring washer is then rotated relative to the knob sleeve and knob flange so that the guide tabs engage behind the undercut section of the knob sleeve. The undercut sections are designed to have bevels to facilitate twisting in combination with axial movement.

[0017] A further embodiment provides, alternatively or additionally, that the transition from the flange section to the opening is bevelled and / or rounded on the side of the undercut section in order to facilitate engagement of the guide tab. Unlike in a thread with full-circumferential thread guidance and multiple thread turns, an undercut section is provided for each guide tab. The undercut section has a groove or recess formed by the flange section and the annular body. The groove or recess of the knob sleeve forming the respective undercut section extends only partially in the circumferential direction, approximately by 10 to 90°, in other embodiments by a different angle around the longitudinal axis or around the axial direction.In addition, the groove or recess is formed on a constant plane in the axial direction compared to the threads of the prior art, thus having a constant distance from the ring body and / or flange section in the axial direction.

[0018] The invention further includes the technical teaching that in a bayonet lock for a locking cylinder, in particular for an electromechanical locking cylinder for connecting a rotary knob to a locking mechanism, comprising a knob sleeve, in particular a knob sleeve as described here, a knob flange, in particular a knob flange as described here, and a spring ring, in particular a spring ring as described here, it is provided that the knob flange is connected to the spring ring and the spring ring engages behind the knob sleeve in an undercut section and the spring ring is releasably locked to the knob flange via a spring arm. The bayonet lock is thus designed in three parts. The knob flange and knob sleeve are connected to one another in a rotationally secure manner in the circumferential direction. The spring ring is designed to be rotatable relative to the knob sleeve and the knob flange.The spring ring is designed so that it can rotate part of its circumference around its longitudinal axis by a predetermined angle relative to the knob sleeve and / or the knob flange, for example by an angle of 10 to 90° or other angular ranges. The knob flange is connected to the locking mechanism on one end and to the spring ring on the other end. The knob sleeve is attached over the spring ring and the knob flange. The knob sleeve and knob flange each have a complementary profile around their circumference, which prevents the knob sleeve and knob flange from twisting relative to one another. After the spring ring has been rotated relative to the knob sleeve, the guide tabs engage behind the undercut section. The guide tabs are also moved axially in a springy manner, creating a spring force which, in addition to locking with the knob flange, prevents accidental release.In another embodiment, an O-ring or similar element is provided axially between the locking mechanism and the knob flange. This creates a seal. The elastic properties of the O-ring also increase the spring force in the axial direction.

[0019] The invention further includes the technical teaching that a locking cylinder, in particular an electromechanical locking cylinder, is provided with a bayonet lock, in particular a bayonet lock as described here. The locking cylinder has, among other things, a rotary knob. The rotary knob has a knob sleeve, in particular the knob sleeve described here. This is connected to a spring ring, in particular the spring ring described here, and a knob flange, in particular the knob flange described here, and thus forms the bayonet lock. By rotating the spring ring relative to the knob flange and / or the knob sleeve, the bayonet connection can be locked or released.

[0020] Furthermore, the invention includes the technical teaching that in an electromechanical locking cylinder set, comprising at least one locking cylinder, in particular a locking cylinder described here, and at least one tool for releasing a rotary knob connected to a locking mechanism by means of a bayonet lock, in particular a bayonet lock described here, the tool is provided with at least one rear gripping tab for engaging in a corresponding rear gripping opening of the bayonet lock, in particular an indentation of the spring ring of the bayonet lock. In order to release the bayonet lock formed by the knob sleeve, knob flange and spring ring, the tool is necessary. This tool is designed as a sheet metal part. A tool head comprises two arms that laterally surround a recess.The recess has a roughly semicircular cross-section with an inner diameter corresponding to the outer diameter of the locking mechanism. At the ends of each arm, a tab is formed, which can be engaged with corresponding recesses in the spring washer. When the tool engages the spring washer, the spring washer can be rotated relative to the knob sleeve and / or the knob flange, thus releasing or locking the bayonet lock.

[0021] Last but not least, the invention includes the technical teaching that in a method for assembling or disassembling a rotary knob, in particular a rotary knob of a locking cylinder, in particular of a locking cylinder described here, with a locking mechanism of a locking cylinder, in particular of a locking cylinder described here, the steps are comprised: connecting a spring ring to a knob flange, connecting the knob flange connected to the spring ring to the locking mechanism, axially pushing in or pushing out the knob flange with the spring ring into a knob sleeve in the direction of a longitudinal axis and / or vice versa, pushing the knob sleeve axially onto the knob flange with the spring ring, rotating the spring ring about the longitudinal axis relative to the knob sleeve and / or the knob flange, wherein the rotating is carried out by an angle in the range of 5° to 90°, preferably from 10° to 75° and most preferably from 15° to 45°.The knob flange is connected to the locking mechanism on one end. The connection is made in such a way that a permanent connection between the spring washer and the knob flange is realized. The knob flange is connected to the locking mechanism on the other end. The knob flange is placed onto the locking mechanism. The locking mechanism is connected to the knob flange in a rotationally fixed manner. On the other end, the knob flange is connected to the spring washer. The knob sleeve is then positioned so that it can be plugged onto the knob flange and the spring washer, or vice versa. The knob flange is connected to the knob sleeve in a rotationally fixed manner. After plugging in, the knob sleeve and / or the knob flange are rotated relative to the spring washer, approximately by an angle in the range listed above, for example 30° plus or minus 15°, depending on the design.This is preferably done using the tool, with which the spring washer is rotated relative to the knob sleeve and / or the knob flange around its longitudinal axis, thus in the circumferential direction. This creates the bayonet lock. The spring washer engages with the guide tabs behind the undercut section of the knob sleeve. The knob sleeve and knob flange are not rotated relative to each other. The bayonet lock is only engaged or released by rotating the spring washer relative to the knob flange and / or the knob sleeve. After releasing the engagement and unscrewing it from the undercut section, the knob sleeve can be released from the knob flange.

[0022] In one embodiment, it is alternatively or additionally provided that the rotation continues until the spring ring engages and / or is perceptible acoustically and / or haptically.

[0023] Further measures improving the invention are specified in the subclaims or emerge from the following description of exemplary embodiments of the invention, which are schematically illustrated in the figures. Uniform reference numerals are used for identical or similar components or features. Features or components of different embodiments can be combined to obtain further embodiments. All features and / or advantages arising from the claims, the description, or the drawings, including design details, spatial arrangement, and method steps, can thus be essential to the invention individually or in a wide variety of combinations. The figures show the following. Fig. 1 shows schematically in a perspective view an embodiment of a spring ring, Fig. 2 shows schematically in a perspective view an embodiment of a knob flange for interaction with the spring ring according to Fig. 1 , Fig. 3 shows schematically in another perspective view the embodiment according to Fig. 2 , Fig. 4 shows schematically in a perspective view an exploded view of the spring ring and the knob flange according to Fig. 1 or Fig. 2 und 3 , Fig. 5 shows schematically in a perspective view the assembly of the embodiments according to Fig. 4 , Fig. 6 shows schematically in a perspective view a section of an embodiment of a knob sleeve for interaction with the embodiments according to Fig. 1 bis 5 , Fig. 7 shows schematically in a perspective view a section of an embodiment of a bayonet closure with assembled spring ring, knob flange and knob sleeve according to Fig. 1 bis 6 in a first position, Fig. 8 shows schematically in a perspective view the section according to Fig. 7 in a second position, Fig. 9 shows schematically in a perspective exploded view an embodiment of an electromechanical locking cylinder and Fig. 10 shows schematically in a perspective view an embodiment of a tool of an electromechanical locking cylinder set.

[0024] The Fig. 1 bis 10 show a design of an electromechanical locking cylinder set and its components in various views, sections and levels of detail. Fig. 1 shows schematically in a perspective view an embodiment of a spring ring 10. Fig. 2 shows schematically in a perspective view an embodiment of a knob flange 30 for interaction with the spring ring 10 according to Fig. 1. Fig. 3 shows schematically in another perspective view the embodiment of the knob flange 30 according to Fig. 2. Fig. 4 shows schematically in a perspective view an exploded view of the spring ring 10 and the knob flange 30 according to Fig. 1 or Fig. 2 und 3. Fig. 5 shows schematically in a perspective view the assembly of the embodiments of the spring ring 10 and the knob flange 30 according to Fig. 4 . Fig. 6 shows schematically in a perspective view a section of an embodiment of a knob sleeve 50 for interaction with the embodiments of the spring ring 10 and the knob flange 30 according to Fig. 1 bis 5 . Fig. 7 shows schematically in a perspective view a section of an embodiment of a bayonet closure 70 with assembled spring ring 10, knob flange 30 and knob sleeve 50 according to Fig. 1 bis 6 in a first position. Fig. 8 shows schematically in a perspective view the section according to Fig. 7 in a second position. Fig. 9 shows schematically in a perspective exploded view an embodiment of an electromechanical locking cylinder 100. Fig. 10 shows schematically in a perspective view an embodiment of a tool 200 of an electromechanical locking cylinder set.

[0025] The spring ring after Fig. 1 is designed in one piece. It consists of a ring body 11 which has a longitudinal axis L (see Fig. 4 ). Two engagement tabs 13 protrude radially inwards from the annular body 11, laterally opposite one another. These are designed to taper inwards. A guide tab 12 protrudes radially outwards as an extension of the engagement tabs 13 for each engagement tab 13. These guide tabs widen outwards. Offset from the engagement or guide tabs 13, 12, two spring arms 14 are formed. The spring arms 14 are formed by a material recess in the annular body 11 in the circumferential direction and at one end in the radial direction. The material recess is thus open radially inwards on one side. At this open end, the spring arm 14, which is firmly connected to the annular body 11 at the other end, forms a locking lug 15, which protrudes radially inwards from the remaining spring arm 14. When pressure is applied against the locking lug 15, the respective spring arm 14 springs radially outwards into the material recess.The locking lugs 15 of the spring arms 14 are located opposite one another in the radial direction. On the side of the radially outer side wall or outer wall, the ring body 11 has indentations or recesses 16. These are designed for engagement of the tool 200. The spring ring 10 is constructed as a single-piece sheet metal part. It has a consistent thickness, i.e., a consistent extension in the axial direction. The thickness of the spring ring 10 is dimensioned such that the spring ring 11, in particular its projecting portions, has a resilient effect and / or that the guide tabs 12 can engage in the corresponding groove 54, 55 of the knob sleeve 50 upon appropriate relative rotation.

[0026] To form the bayonet lock 70, the spring ring 10 is designed for connection to the knob flange 30 and the knob sleeve 50. The knob flange 30 has an annular body 31. This completely surrounds the longitudinal axis L. On an end face of the annular body 31 designed to interact with the spring ring 10, the annular body 31 has an extension 32 extending in the axial direction. The extension 32 is also annular and does not protrude into an interior space I, so that this interior space I runs through the extension 32 without any offset from the annular body 31. The extension 32 has a flange section 35 remote from the annular body 31, which has a plurality of projections 33 radially inward, so that an undercut is formed between the annular body 31 and the axially outer end face of the extension 32.To enable the spring washer 10 to engage behind the undercut with the engagement tabs 13, the flange section 35 has a complementary opening 36 for each engagement tab 13. Only when the engagement tabs 13 and the openings 36 are axially aligned can the spring washer 10 be pushed over the flange section 35 in the direction of the ring body 31 of the knob flange 30 onto the extension 31 and secured there by engaging in the undercut by a corresponding rotation. To prevent the engaging spring washer 10 from accidentally coming loose, at least two corresponding locking sections 37 are provided between the ring body 31 and the flange section 35 for each locking lug 15. The locking sections 37 are designed to interact with the locking lug 15 and each have a radially outwardly projecting shoulder or projection 37a and / or a radially inwardly projecting recess or depression 37b.When the spring ring 10 is rotated relative to the knob flange 30, the respective locking lug 15 and thus the corresponding spring arm 14 are pressed radially inwards so that the locking lug 14 can pass the projection 37a. After passing the projection 37a, the locking lug 15 springs back and engages behind the projection 37a and / or in the recess 37b. In order to release the locking connection thus formed, the locking lug 15 must be moved radially inwards and rotated. This is possible using the special tool 200, which engages in the indentation, cutout or engagement 16 provided for this purpose. On the end face facing the flange section 35, the knob flange 30 is provided with the locking mechanism 103 (see . Fig. 9 ) can be connected or connected. Two tabs 38 designed axially and radially on the outside are provided for fastening the electronics arranged in the knob sleeve. In addition, the knob flange 30 has depressions / recesses 39a and / or projections / formations 39b on its radially outer peripheral wall to form a profile 39, which enables the knob sleeve 50 to be placed onto the knob flange 30 in a twist-proof manner. After the knob sleeve 50 has been placed onto the knob flange 30, the bayonet lock 70 is effected by turning the spring ring 10 relative to the knob flange 30 and the knob sleeve 50. The end face on the flange section side is designed for connection to the knob sleeve 50. The connection between the knob sleeve 50, the spring ring 10 and the knob flange 30 is designed as a bayonet connection.

[0027] In Fig. 4 The assembly of spring washer 10 and knob flange 30 is shown. The spring washer 30 is placed in the longitudinal direction L over the flange section 35 onto the extension 31. The engagement tabs 13 and the openings 36 are aligned. Once the spring washer 10 is moved over the flange section 35, it is rotated relative to the knob flange 30. The engagement tabs 13 engage behind the projections 33 and protrude into the engagement section 34, thus ensuring a secure connection in the axial direction L or in the direction of the longitudinal axis L. To prevent accidental release, the locking lug 15 engages in the respective locking section 37 upon rotation. Fig. 5 the assembly of spring ring 10 and knob flange 30 is shown.

[0028] To form the bayonet lock 70, the knob sleeve 50 has a corresponding inner contour 51. This inner contour 51 forms a guide 51 for the corresponding sections of the knob flange 30 and the spring washer 10. For this purpose, the knob sleeve 50 has an interrupted flange section 52 on the front side or several flange sections 52, with at least one axial opening 53 for the passage of the corresponding guide tab 12 of the spring washer 10. Furthermore, the knob sleeve 50 has several undercut sections 54 adjoining it in the direction of the opposite front side, in which the corresponding guide tab 12 engages after axially passing through the respective opening 53 and axially rotating. The knob sleeve 50, the knob flange 30, and the spring washer 10 together form the bayonet lock 70. First, the spring ring 10 is connected to the knob flange 30.The spring ring 10 engages with the knob flange 30 by appropriate twisting and engaging of the locking lugs 15 in the corresponding locking sections 37. The spring ring 10 is then aligned so that its guide tabs 12 are aligned with the corresponding openings 53. A corresponding opening 53 is provided for each guide tab 12. The knob sleeve 50 is moved axially over the spring ring 10 and the knob flange 30, and then the spring ring 10 is rotated so that the guide tabs 12 engage behind the respective undercut section 54. The knob sleeve 50 and the knob flange 30 are connected to one another in a rotationally secure manner by the bulges 39a. The undercut sections 54 are designed such that they have bevels 55 to facilitate rotation in combination with axial movement. The solution is obtained in reverse. In . Fig. 7 An unlocked position of the bayonet lock 70 is shown. In Fig. 8 the locked or latched position of the bayonet lock 70 is shown.

[0029] In Fig. 7 The guide tabs 12 are guided axially through the openings 53. The locking lug 15 projects into a recess 37b of the locking section 37 and is blocked against rotation in the circumferential direction by the projection 37a of the locking section 37. Due to the inner contour 51, which corresponds to or is complementary to the outer contour of the knob flange 30, the knob flange 30 is arranged in the knob sleeve 50 in a rotationally secure manner. Thus, only the spring ring 10 is rotatable relative to the knob sleeve 50 and the knob flange 30. To close, the spring ring 10 is now rotated by approximately 10 to 45 degrees - depending on the design.

[0030] The rotated position is in Fig. 8 shown. While the knob sleeve 50 and knob flange 30 are not rotated relative to one another due to the profile 39 complementing the inner contour 51, the respective guide tab 12 of the spring ring 10 now engages behind the corresponding flange section 52 and engages in the rear engagement section 54. The respective locking lug 15 has been moved over a projection 37a into an adjacent recess 37b of the respective locking section 37 due to the flexibility of the spring arm 14 and is blocked there against turning back. To open the bayonet lock 70, the tool 200 for moving the spring ring 10 relative to the knob sleeve 50 and knob flange 30 is required.

[0031] An embodiment of the overall structure of an electromechanical locking cylinder 100 with a locking cylinder actuated via the bayonet lock 70 is shown in Fig. 9 The tool 200 is shown in Fig. 10 The electromechanical locking cylinder 100 comprises a first handle designed as a rotary knob 101 and a second handle 113 axially opposite in the longitudinal direction L. The rotary knob 101 comprises the knob sleeve 50. The knob flange 30 with the spring ring 10 (in Fig. 9not visible). Adjoining this in the axial direction or longitudinal direction L is the locking or locking mechanism 103, with an O-ring 102 being provided between the knob flange 30 and the locking mechanism 103. In the embodiment shown, two shaft extensions 104 are provided on the locking mechanism 103 in the direction of the second handle 113; however, these can be provided optionally depending on the particular embodiment of the locking cylinder. The shaft extension 104 is connected to a locking lever 110, via which the opening / closing of the locking cylinder 100 is effected. The locking lever 110 is connected to a knob shaft 111, which in turn is connected to the second handle 113 designed as a rotary knob 113. The locking mechanism 103 is accommodated up to the knob shaft 111 in a cylinder housing 108. There, the accommodated components are secured by clamping rings 107 and positioned by spacer rings 109.Additionally, in the embodiment shown here, cylindrical pins 105 are provided in the cylinder housing 108. These, like the shaft extensions 104, are optional depending on the respective embodiment. The second handle 113 is connected to the knob shaft 111 via a threaded pin 112.

[0032] To attach the locking cylinder 100 to a door, the tool 200 is required. This is used in particular to release the first handle 101. The tool 200 is formed as a single-piece, bent sheet metal part. An engagement part 202 is bent from a handle part 201. The engagement part 202 has two arms 203 that laterally surround a semicircular recess 204. At the end 205 remote from the handle part 201, each of the arms 203 has a projecting tab 216. These are designed to engage in corresponding recesses 16 in the spring ring 10. As soon as the tool 200 engages with the tabs 216 in the corresponding recesses 16, the spring ring 10 can be rotated by means of the tool. In this case, the locking lug 15 is moved from the locking position in the locking section 37 over a projection 37a which otherwise limits the movement, wherein the spring arm 14 gives way to overcome the projection 37a.After turning the spring ring 10, the knob sleeve 50 can be moved axially in the longitudinal direction L from the knob flange 30 and a battery accommodated in the knob sleeve 50 can be removed. List of reference symbols

[0033] 10 Spring washer 11 Ring body 12 Guide lug 13 Engagement lug 14 Spring arm 15 Locking lug 16 Recess / cutout 30 Knob flange 31 Ring body 32 Extension 33 Projection 34 Undercut section 35 Flange section 36 Opening 37 Locking section 37a Extension / projection 37b Cutout / recess 38 Lug 39 Profile 39a Cutout / recess 39b Projection / deformation 50 Knob sleeve 51 Inner contour / guide 52 Flange section 53 Cutout 54 Undercut sections 55 Inclined section 70 Bayonet catch 100 Electromechanical locking cylinder 101 Handle / turn knob 102 O-ring 103 Locking mechanism 104 Shaft extension 105Cylinder pin 107Clamping ring 108Cylinder housing 109Spacer ring 110Locking lever 111Knob shaft 112Threaded pin 113Handle / turning knob 200Tool 201Grip part 202Engaging part 203Arm 204Recess 205End 216(Rear-engaging) tab IInterior LLongitudinal axis

Claims

1. Spring ring (10), in particular a spring ring (10) for a bayonet closure (70) of a locking cylinder, in particular an electromechanical locking cylinder, comprising an annular body (11) which has at least one guide tab (12) pointing outwards for engaging in a guide (51) of a corresponding knob sleeve (50), which has at least one engagement tab (13) pointing inwards for a guided arrangement on a knob flange (30) and which has at least one inwardly projecting, outwardly resilient spring arm (14) in order to snap into a corresponding snap-in receptacle of the knob flange (30).

2. Spring ring (10) according to claim 1, characterized in that the at least one spring arm (14) has at least one inwardly projecting locking lug (15) at its end.

3. Knob flange (30), in particular a knob flange (30) for a bayonet lock (50) of a locking cylinder, in particular an electromechanical locking cylinder, for interaction with a spring washer (10), in particular a spring washer (10) according to claim 1 or 2, wherein the knob flange (30) has an annular body (31) which has an axially projecting extension (32) on one end face for receiving a spring washer (10), which has a flange section (35) remote from the annular body (31) with at least one through-opening (36) for a corresponding engagement tab (13) of the spring washer (10), and which has a latching section (37) between the annular body (31) and the flange section (35) with at least one laterally or radially projecting projection (37a) and / or at least one laterally or radially projecting recess (37b) for latching interaction with the corresponding spring arm (14),in particular the corresponding locking lug (15) of the spring ring (10).

4. Knob sleeve (50), in particular a knob sleeve (50) for a bayonet lock (70) of a locking cylinder, in particular an electromechanical locking cylinder, for interaction with a spring ring (10), in particular a spring ring (10) according to one of claims 1 or 2, and / or a knob flange (30), in particular a knob flange (30) according to claim 3, wherein the knob sleeve (30) has a guide (51) on the inside, with an end-face flange section (52) which has at least one axial opening (53) for the passage of the corresponding guide tab (12) of the spring ring (10), and an undercut section (54) adjoining it in the direction of the opposite end face, in which the corresponding guide tab (12) engages after axially passing through the opening (53) and axially rotating.

5. Knob sleeve (10) according to claim 5, characterized in that the transition of the flange section (52) to the opening (53) on the side of the undercut section (54) is bevelled and / or rounded in order to facilitate engagement of the guide tab (12).

6. Bayonet closure (70) for a locking cylinder, in particular for an electromechanical locking cylinder for connecting a rotary knob (101) to a locking mechanism (103), comprising a knob sleeve (50), in particular a knob sleeve (50) according to one of claims 4 or 5, a knob flange (30), in particular a knob flange (30) according to claim 3 and a spring ring (10), in particular a spring ring (10) according to one of claims 1 or 2, wherein the knob flange (30) is connected to the spring ring (10) and the spring ring (10) engages behind the knob sleeve (50) in an undercut section (54) and the spring ring (10) is releasably locked to the knob flange (30) via a spring arm (14).

7. Locking cylinders, in particular electromechanical locking cylinders, characterized in that the locking cylinder has a bayonet lock, in particular the bayonet lock (70) according to claim 6.

8. Electromechanical locking cylinder set, comprising at least one locking cylinder, in particular a locking cylinder according to claim 7, and at least one tool (200) for releasing a rotary knob (101) connected to a locking mechanism (103) by means of a bayonet catch (70), in particular a bayonet catch (70) according to claim 6, wherein the tool (200) has at least one rear gripping tab (216) for engaging in a corresponding rear gripping opening of the bayonet catch (70), in particular an indentation (16) of the spring ring (10) of the bayonet catch (70).

9. Method for assembling a rotary knob (101), in particular a rotary knob (101) of a locking cylinder, in particular a locking cylinder according to claim 7, with a locking mechanism (103) of a locking cylinder, in particular a locking cylinder according to claim 7, comprising the steps of: connecting a spring ring (10) to a knob flange (30), connecting the knob flange (30) connected to the spring ring (10) to the locking mechanism (103), axially inserting the knob flange (30) with the spring ring (10) into a knob sleeve (50) in the direction of a longitudinal axis (L) or vice versa, attaching the knob sleeve (50) axially onto the knob flange (30) with the spring ring (10), rotating the spring ring (10) about the longitudinal axis (L) relative to the knob sleeve (50) and / or the knob flange (30), wherein the rotating is a rotating through an angle in the range of 5° to 90°, preferably from 10° to 75° and most preferably from 15° to 45°.

10. Method according to claim 9, characterized in that the rotation continues until the spring ring (10) engages and / or is perceptible acoustically and / or haptically.

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