Electronic cylinder lock

Abstract

The electronic cylinder lock (1) comprises a rotor (2), a cam (3) for actuating a lock-opening mechanism, a coupling element (4) slidably supported within the rotor (2) and movable between a coupled and a decoupled position between the rotor (2) and the actuating cam (3), an electromagnetic actuator (5, 6, 7, 8, 9, 16) for moving the coupling element (4) housed in the rotor (2), the rotor (2) including first means (100) for receiving electrical energy via electrical contact and second means (101) for receiving electrical energy via electromagnetic induction to supply electrical power to the electromagnetic actuator (5, 6, 7, 8, 9, 16).

Description

[0001] ELECTRONIC CYLINDER LOCK

[0002] DESCRIPTION

[0003] The present invention relates to an electronic cylinder lock comprising a rotor, a cam for actuating a lock-opening mechanism, and a coupling element between the rotor and the cam.

[0004] In a known electronic cylinder lock, the coupling can be activated and performed via a key or a knob.

[0005] When it becomes necessary to change the type of coupling, it is currently required to replace the entire electronic lock, resulting in high costs, time consumption, and complex inventory management logistics.

[0006] This issue is especially critical in installations involving multiple doors, and consequently multiple electronic locks.

[0007] The technical object of the present invention is to provide an electronic cylinder lock offering greater operational versatility, enabling it to adapt flexibly to changing requirements.

[0008] As part of this technical objective, one aim of the invention is to create an electronic cylinder lock that requires a reduced amount of energy to perform the coupling between the rotor and the actuation cam, while maintaining stable operational configurations.

[0009] This technical objective, along with these and other aims, according to this invention, is achieved by providing an electronic cylinder lock comprising a rotor, a cam for actuating a lock-opening mechanism, a coupling element supported slidably within the rotor between a coupling and a decoupling position between said rotor and said cam, an electromagnetic actuator housed in said rotor for moving said coupling element, characterized in that said rotor includes first means for receiving electrical energy via electrical contact and second means for receiving electrical energy via electromagnetic induction to supply electrical power said electromagnetic actuator.

[0010] Advantageously, the electronic cylinder lock according to the invention includes a knob and, respectively, a key, each of which can be interchangeably engaged in a slot of the rotor to transfer energy to said first means for receiving electrical energy and said second means for receiving electrical energy.

[0011] In a preferred embodiment of the invention, the electronic cylinder lock, according to the invention, includes automatic locking means for the knob within the slot.

[0012] In a preferred embodiment of the invention, the electronic cylinder lock, according to the invention, includes unlocking means for detaching said knob from said slot. Other features of the invention are set forth in the dependent claims below.

[0013] The rotor of the electronic cylinder lock is advantageously designed to selectively accept either a knob or a key.

[0014] Specifically, the knob has a stem shaped congruently with the key stem, enabling proper insertion into the rotor slot and correct electrical energy transfer.

[0015] The cylinder of the electronic lock can thus be converted from key-operated to knob- operated and vice versa, in the preferred case where the knob, like the key, is also removable.

[0016] The key is battery-powered and transfers energy to the cylinder via electromagnetic induction.

[0017] The knob preferably operates without a battery.

[0018] It can be powered via NFC communication from an external system (e.g., a smartphone) or through an internal energy harvesting system, and transfers energy to the cylinder through electrical contact. The cylinder is already equipped with both induction and contact energy transfer systems, and either system can be used alternately but not simultaneously.

[0019] According to the invention, with a single cylinder mounted in the frame, various actuation systems can thus be provided, one being key-operated, one being knob- operated and powered from the outside, and one being knob-operated and powered from its own internal source.

[0020] In the same installation, a given configuration of the locks can initially be used; for example, some frames may be equipped with key-operated electronic cylinder locks, while others may be equipped with knob-operated electronic cylinder locks and, subsequently, the configuration may be changed, for instance, the frames may be standardized with only key-operated electronic cylinder locks, or all with knob- operated electronic cylinder locks, and the configurations can in any case always be modified at will and are reversible.

[0021] Additionally, the key can still be used even after a potential attack / force removal of the knob.

[0022] Further features and advantages of the invention will become more evident from the description of a preferred but non-exclusive embodiment of the electronic cylinder lock according to the invention, illustrated by way of example and not limitation in the accompanying drawings, wherein:

[0023] Figure 1 shows an axonometric view of the lock, in which a key is associated with the external side of the cylinder.

[0024] Figure 2 shows the lock of Figure 1 in a partially disassembled view;

[0025] Figure 3 shows some disassembled parts of the lock of Figure 1;

[0026] Figure 4 shows the coupling element of the lock of Figure 1 with the magnets removed; Figure 5 shows the rotary element of the lock of Figure 1 with the magnets removed. Figures 6 A, B, C, D, E, show rear views of the rotor with the components mounted therein, in various operating positions;

[0027] Figure 7 shows a side elevation view of a vertical section of the lock with the key not fully inserted;

[0028] Figure 8 shows a side elevation view of a vertical section of the lock with the key fully inserted;

[0029] Figure 9 shows an exploded detail of the energy recovery and locking system in the closed position;

[0030] Figure 10a shows an axonometric view of a knob with the locking pin in the locking position.

[0031] Figure 10b shows an axial sectional view of the knob of Figure 10a inserted and engaged with the slot of the cylinder rotor;

[0032] Figure I la shows an axonometric view of a knob with the locking pin in the unlocking position;

[0033] Figure 11b shows an axial sectional view of the knob of Figure Ila inserted but disengaged from the slot of the cylinder rotor;

[0034] Figure 12a shows a side elevation view of the shaft of the knob of Figure 10a;

[0035] Figure 12b shows an axial sectional view of the rotor of the cylinder with the knob disengaged; and

[0036] Figure 12c shows an axial sectional view of a detail of the rotor of the cylinder with the knob engaged.

[0037] With reference to the mentioned figures, an electronic cylinder lock is shown, generally indicated by the reference numeral 1. The electronic lock 1 comprises a cylindrical stator 2’ with a longitudinal axis L, and a rotor 2 housed coaxially within the stator 2’, rotatable about axis L.

[0038] The electronic lock 1 further comprises a cam 3 for actuating a lock-opening mechanism (not shown).

[0039] The cam 3 is also rotatably supported by the cylindrical stator 2' about the axis L.

[0040] The rotor 2 houses a coupling element 4 movable between a coupling position and a decoupling position between the rotor 2 and the actuating cam 3.

[0041] The coupling element 4 is rotationally fixed with the rotor 2.

[0042] In the coupling position, the coupling element 4 engages with a corresponding seat 19 formed in the actuating cam 3, and the actuating cam 3 is rotationally constrained to the rotor 2, while in the decoupling position, the coupling element 4 disengages from the corresponding seat 19 formed in the actuating cam 3, and the actuating cam 3 is rotationally uncoupled from the rotor 2.

[0043] The rotor 2 houses an actuator 5, 6, 7, 8, 9, 16 for moving the coupling element 4 comprising an electric motor 16, a rotary element 5 rotatable by the electric motor 16, and magnetic coupling means 6, 7, 8, 9 between the rotary element 5 and the sliding coupling element 4.

[0044] The axis of rotation L' of the rotary element 5 may coincide, as shown, with the axis L of the cylindrical stator 2' .

[0045] The rotary element 5 performs a reversible stroke between an end-of-stroke closing position and an end-of-stroke opening position, where it commands the switching of the coupling element 4 from the decoupling position to the coupling position.

[0046] The electric motor 16 has a rotating output shaft on which a pinion 17 is mounted. The output shaft of the electric motor 16 is rotatable about an axis that is parallel to and offset from the axis L of the cylindrical stator 2'. The pinion 17 meshes with a toothed arc 18 of the rotary element 5.

[0047] The magnetic coupling means 6, 7, 8, 9 comprise at least one primary permanent magnet 6, 7 fixed to the rotary element 5 and at least one secondary permanent magnet 8, 9 fixed to the sliding coupling element 4.

[0048] The magnetic coupling means are configured and arranged to provide a plurality of functions; in fact, they: generate holding forces for maintaining the coupled and decoupled positions of the coupling element 4; generate magnetic forces sufficient to displace the coupling element 4 from the coupled position to the decoupled position, and vice versa; generate retention torques for maintaining a stable equilibrium position of the rotary element 5 when it is in the end-of-stroke closing position and in the end-of-stroke opening position; generate, in specific phases of the decoupling cycle, torques on the rotary element 5 that, in the event of incomplete decoupling, enable the completion of the decoupling; assist a phase of the rotation of the rotary element 5; and finally, as will be clarified below, store energy in the magnetic field from the extraction of the key or knob, for use in the subsequent opening cycle.

[0049] Specifically, the magnetic coupling means comprise a first primary permanent magnet 6 and a second primary permanent magnet 7, and a first secondary permanent magnet 8 and a second secondary permanent magnet 9.

[0050] In the end-of-stroke closing position, illustrated in Figure 6A, the first primary permanent magnet 6 and the second primary permanent magnet 7, and the first secondary permanent magnet 8 and the second secondary permanent magnet 9 are arranged to collectively exert on the rotary element 5 a magnetic torque in the closing direction, and on the coupling element 4 a magnetic force in the decoupling direction. In the end-of-stroke opening position, illustrated in Figure 6E, the first primary permanent magnet 6 and the second primary permanent magnet 7, and the first secondary permanent magnet 8 and the second secondary permanent magnet 9 are arranged to collectively exert on the rotary element 5 a magnetic torque in the opening direction, and on the coupling element 4 a magnetic force in the coupling direction.

[0051] Specifically, in the end-of-stroke closing position, illustrated in Figure 6A, the permanent magnets 7 and 9 are in a mutual magnetic coupling configuration that generates on the rotary element 5 a first magnetic torque in the closing direction, and the permanent magnets 6 and 8 are in a mutual magnetic coupling configuration that generates on the rotary element 5 a second magnetic torque, also in the closing direction, although of lower intensity.

[0052] Furthermore, in the end-of-stroke closing position, illustrated in Figure 6A, the second primary permanent magnet 7 and the second secondary permanent magnet 9 are in a mutual magnetic coupling configuration that generates a magnetic force on the coupling element 4 in the decoupling direction.

[0053] In the end-of-stroke opening position, illustrated in Figure 6E, the first primary permanent magnet 6 and the second secondary permanent magnet 9 are in a mutual magnetic coupling configuration that generates a magnetic force on the coupling element 4 in the coupling direction.

[0054] Furthermore, in the end-of-stroke opening position, illustrated in Figure 6E, the same permanent magnets 6 and 9 cooperate to maintain in stable position the rotary element 5.

[0055] The coupling element 4 is slidable radially with respect to the rotation axis L of the rotor 2. The first primary permanent magnet 6 and the second primary permanent magnet 7 are positioned at an angular offset around the rotation axis L' of the rotary element 5 and have magnetic polarization axes lying in the rotation plane and mutually inclined.

[0056] The coupling element 4 is linearly slidable orthogonally with respect to the axis of the cylinder rotor 2.

[0057] In the end-of-stroke opening position, the first primary permanent magnet 6 and the second secondary permanent magnet 9 face each other with coaxial polarization axes oriented in the direction of movement of the coupling element 4 and with polarities such as to generate on the coupling element 4 a magnetic force directed toward achieving the coupling position.

[0058] Regardless of the specific construction of the actuator 5, 6, 7, 8, 9, 16 for moving the coupling element 4, which may therefore also take other structural forms, the salient aspect of the invention lies in the fact that the rotor 2 comprises first means 100 for receiving electrical energy via electrical contact and second means 101 for receiving electrical energy via electromagnetic induction for the electrical supply of the electromagnetic actuator 5, 6, 7, 8, 9, 16.

[0059] The electronic lock 1 in turn comprises a knob 102 and respectively a key 11 which are interchangeably engageable in a slot 12 of the rotor 2.

[0060] The knob 102 includes a first electrical circuit for transferring electrical energy to the first means 100 for receiving electrical energy.

[0061] The key 11 , in turn, includes a second electrical circuit for transferring electrical energy to the second means 101 for receiving electrical energy.

[0062] The knob 102 comprises a shaft 102a engageable within the slot 12 of the rotor 2. The first electrical circuit for transferring electrical energy comprises, within the shaft 102a of the knob 102, first means 103 for transferring electrical energy by electrical contact to the first means 100 for receiving electrical energy.

[0063] The key 11 comprises a shaft I la engageable within the slot 12 of the rotor 2.

[0064] The second electrical circuit for transferring electrical energy comprises, within the shaft I la of the key 11, second means 104 for transferring electrical energy by electromagnetic induction to the second means 101 for receiving electrical energy.

[0065] The first means 103 for transferring electrical energy comprise two electrical terminals 105, 105' at different electrical potentials: a first electrical terminal 105 formed by an electrically conductive lamella suitably electrically insulated from the stem 102a of the knob 102 and exposed on an outer surface 106 of the stem 102a of the knob 102, and a second electrical terminal 105' formed by a metallic portion of the stem 102a of the knob 102.

[0066] The first means 100 for receiving electrical energy comprise two electrical contacts 107, 107', each engageable by a respective electrical terminal 105, 105': a first electrical contact 107 formed by a first pin facing into the slot 12 of the rotor 2 for contact with the first electrical terminal 105, and a second electrical contact 107' formed by a second pin also facing into the slot 12 of the rotor 2 for contact with the second electrical terminal 105'.

[0067] The second means 104 for transferring electrical energy comprise a second electrical circuit for transferring electrical energy including a primary electrical coil 108 housed within the shaft 11 a of the key 11.

[0068] The second means 101 for receiving electrical energy comprise a second electrical energy receiving circuit including a secondary electrical coil 109. The first means 103 for transferring electrical energy may be connected to an energy recovery system housed within the knob 102.

[0069] The first means 103 for transferring electrical energy may alternatively be configured for connection to an external power source outside the knob 102, for example via an NFC transmission system.

[0070] Advantageously, the electronic lock 1 also comprises automatic locking means for the knob 102 in the slot 12 of the rotor 2.

[0071] The automatic locking means comprise a first elastic member 111 and a locking pin 110, which is normally positioned in a locking position by the action of the first elastic member 111.

[0072] The locking pin 110 is movable between a locking position and a unlocking position. The locking pin 110 in the locking position extends outwardly from a sliding seat 113 formed in the stem 102a of the knob 102 and engages a locking seat 112 formed in the rotor 2 and opening into the slot 12.

[0073] The sliding seat 113 formed in the stem 102a of the knob 102 and the locking seat 112 formed in the rotor 2 are aligned along a direction orthogonal to the axis of the rotor 2.

[0074] In particular, the stem 102a of the knob 102 is flat, similarly to the stem 1 la of the key 11, and the sliding seat 113 extends orthogonally with respect to the thickness direction of the stem 102a of the knob 102.

[0075] The first elastic element 111 in the illustrated embodiment is formed by a helical spring interposed between a base of the locking pin 110 positioned inside the sliding seat 113 and a bottom portion of the sliding seat 113.

[0076] The locking pin 110 is further provided at its apex with a tapered portion 119 defining an inclined surface which, during the initial phase of insertion of the stem edge of the outer end of the slot 12 of the rotor 2 and causes the retraction of the locking pin 110 into its sliding seat 113 against the action of the helical spring which is thereby compressed.

[0077] During the subsequent phase of insertion of the stem 102a of the knob 102 into the slot 12 of the rotor 2, the locking pin 110, due to interference with the wall of the slot 12, remains retracted within its sliding seat 113 until the moment in which its sliding seat 113 becomes aligned with the locking seat 112: upon reaching this position, the locking pin 110 is free to extend into the locking seat 112 under the thrust of the helical spring, which thereby relaxes.

[0078] The unlocking means comprise a rod 114 movably supported by the stem 102a of the knob 102.

[0079] In particular, the rod 114 extends along the stem 102a of the knob 102, parallel to the stem 102a of the knob 102.

[0080] More precisely, the rod 114 is supported so that it is able to rotate about its own axis. The rod 114 has a motion-engaging end 115 and a shaped end 116.

[0081] The motion-engaging end 115 of the rod 114 is accessible from the outside of the knob 102.

[0082] To this end, the knob 102 has an internal linear channel 120 that originates from the outer wall of the knob 102 and opens onto the motion-engaging end 115 of the rod 114.

[0083] The channel 120 is configured for the passage of a dedicated tool, such as a screwdriver, the tip of which can engage with the motion-engaging end 115 of the rod 114, which has a conjugated shape, to allow the rotational actuation of the rod The shaped end 116 of the rod 114 is configured to actuate the locking pin 110 for its reversible displacement between the locking position and the unlocking position. The shaped end 116 of the rod 114 is formed by an eccentric cam slidably engaged in a buttonhole 118 provided in the locking pin 110.

[0084] The buttonhole 118 provided in the locking pin 110 is configured to convert the rotation of the eccentric cam into a translational movement of the locking pin 110 from the locking position to the unlocking position, against the action of the helical spring which is compressed.

[0085] Preferably, to stabilize the locking of the eccentric cam within the buttonhole 118, a torsional biasing spring 122 is provided, acting on the motion-engaging end 115 of the rod 114.

[0086] Finally, in the illustrated embodiment, dedicated energy storage means are provided, configured to store energy from a withdrawal movement of the key 11 or of the knob 102 from the slot 12, in order to assist a subsequent rotational actuation of the rotary element 5.

[0087] The energy storage means comprise a lever 22 sliding within the rotor 2 and provided with releasable locking means to the key 11 or to the knob 102.

[0088] The locking coupling means comprise a pivoting hook 20 hinged to the lever 22 and engageable in a notch 21 on the stem I la of the key 11 or in a notch 121 on the stem 102a of the knob 102.

[0089] The lever 22 engages with the key 11 or the knob 102 during the insertion of the key 11 or the knob 102 into the slot 12 and disengages from the key 11 or the knob 102 during a terminal phase of the extraction of the key 11 or the knob 102 from the slot The lever 22 comprises a shaped pin 13 for transmitting motion to an inclined plane 14 for transferring motion, which is integral with the rotary element 5.

[0090] In practice, the inclined plane 14 is formed by a sliding surface for the pin 13 which extends along a line that wraps at an angle around the rotation axis L' of the rotary element 5.

[0091] The inclined plane 14 is specifically formed as a helical screw.

[0092] In this manner, a translational movement of the lever 22 is converted into a rotational movement of the rotary element 5.

[0093] The key 11 or the knob 102 is engaged with the lever 22 by means of the hook 20 which forces the lever 22 to follow the seat of the slot 12 and to actuate the helical surface 14 in rotation via the pin 13.

[0094] During the initial phase of extraction of the key 11 or the knob 102, the lever 22 is dragged by the latter and, once engagement between the pin 13 and the inclined surface 14 has occurred, the rotary element 5 begins to rotate.

[0095] Finally, the lock 1 includes mechanical locking means for the rotary element 5 in the end-of-stroke closed position.

[0096] The mechanical locking means of the rotary element 5 in the end-of-stroke closed position comprise a shoulder 15 of the inclined surface 14, which is intercepted by the pin 13 in correspondence with the release position of the lever 22 from the key 11 or the knob 102.

[0097] The mechanical locking means of the rotary element 5 in the end-of-stroke closed position are further defined by the engagement geometry between the pinion 17 and the rotary element 5, which is limited to the toothed arc 18 whose angular width defines the rotational end stops.

[0098] The setup of the electronic lock for use is particularly simple. The user selects either the key 11 or the knob 102.

[0099] In the case where the key 11 is selected, upon full insertion of its stem I la into the slot 12, the primary coil 108 is positioned correctly for inductive coupling with the secondary coil 109 for energy transfer.

[0100] To extract the key 11 from the rotor 2, the user simply needs to apply a pulling force. In the case where the knob 102 is selected, upon full insertion of its stem 102a into the slot 12, it engages with the slot 12 and positions the electrical terminals 105, 105' in the correct engagement position with the respective electrical contacts 107, 107' for energy transfer.

[0101] To extract the knob 102 from the rotor 2, the operator, using one hand, manipulates the screwdriver to release the locking pin 110 and, with the other hand, applies a pulling force on the knob 102.

[0102] At any time, the key 11 can be replaced with the knob 102 and vice versa. The operation of the electronic lock is briefly as follows.

[0103] The rotary element 5 is initially in a stable closed end-of-stroke position, secured by the initial configuration assumed by the magnets 6, 7, 8, 9 as shown in Figure 6A. As shown in Figure 6 A, magnets 7 and 9 are in a repulsive configuration, since they face each other with magnetic poles of the same polarity, and they generate a clockwise torque on the rotary element 5 that ensures the stability of the closed end- of-stroke position, and a magnetic force on the coupling element 4 in the decoupling direction.

[0104] In the illustrated case, the decoupling direction is only incidentally vertical.

[0105] The decoupling direction may vary, since it is not possible to define a priori the angular position of the rotor 2. The contribution of the pair of magnets 6 and 8 to the performance of the aforementioned functions is less significant, as can be seen in Figure 6A.

[0106] During the insertion of the key 11 or the knob 102, the lever 22 engages with the key 11 or the knob 102 and is moved backward so that the pin 13 disengages from the shoulder 15 and the end-of-stroke closed position is unlocked.

[0107] The key 11 or the knob 102, if authorized, once inserted into the slot 12, charges a capacitor located on the electronic board of the cylinder.

[0108] The energy from the capacitor powers the motor 16 which drives the pinion 17 that rotates the rotating element 5 in the counterclockwise direction.

[0109] The opening torque initially delivered to the rotary element 5 by the motor 16 exceeds the magnetic holding torque of the closed position generated by the magnetic coupling means.

[0110] When the rotary element 5 during its opening rotation, exceeds a threshold angular position as illustrated in Figure 6B, the magnetic torque generated by the magnetic coupling means reverses direction and assists the opening.

[0111] During the angular rotation of the rotary element 5 in the opening direction, the opening magnetic torque is initially provided both by the permanent magnets 6 and 8 which are in mutual magnetic coupling and provide a first magnetic torque contribution in the opening direction, and by the permanent magnets 7 and 9, which are also in mutual magnetic coupling and provide a second magnetic torque contribution in the opening direction (see Figure 6C). In particular, the permanent magnets 6 and 8 repel each other by facing each other with magnetic poles of the same polarity, and likewise the permanent magnets 7 and 9 repel each other by facing each other with magnetic poles of the same polarity, although this polarity is opposite to that of the poles of permanent magnets 6 and 8. As the rotary element 5 continues its angular rotation in the opening direction, the opening torque is provided by permanent magnets 6 and 9, which come into mutual magnetic coupling (Figure 6D). In particular, the permanent magnets 6 and 9 attract each other by facing with magnetic poles of opposite polarity.

[0112] The rotary element 5 reaches the end-of-stroke opening position (Figure 6E).

[0113] The permanent magnets 6, 9 are aligned and face each other with opposite magnetic polarity to exert a coupling force on the coupling element 4.

[0114] The equilibrium of the rotary element 5 is maintained by the permanent magnets 6, 9: in fact, in the event of a slight disturbance of the equilibrium, the permanent magnets 6, 9 generate a magnetic torque that returns the rotary element 5 to its initial position.

[0115] It should be noted that the coupling is conditional on the correct angular alignment of the coupling element 4 with its engagement seat 19. If such angular alignment is not present, it must be manually achieved by the user by rotating the rotor 2.

[0116] When the coupling element 4 is engaged, the actuating cam 3 is rotationally fixed to the rotor 2 and the rotation of the key 11 within the rotor 2 can be transmitted to the actuating cam 3 to actuate the lock opening mechanism.

[0117] As previously mentioned, during the subsequent extraction of the key 11 or the knob 102, the lever 22, pulled forward by the key 11 or the knob 102, resets the rotating element 5 to the end-of-stroke closing position through the engagement of the motion-transmitting cam 13 with the motion-receiving cam 14, and upon disengagement from the key 11 , it locks the rotary element 5 against the shoulder 15 in the end-of-stroke closing position. The mechanical energy required by the user to extract the key 11 or the knob 102 from the slot 12 is thus used to reset the system and store energy in the magnetic field for the subsequent opening cycle.

[0118] It is possible to provide dedicated mechanical locking means 25, 26 for the coupling element 4, when decoupled in the end-of-travel closing position.

[0119] In particular, such locking means may include a tooth 25 formed on the rotary element 5 configured to cooperate with a stop 26 formed on the coupling element 4. In practice, the materials used, as well as the dimensions, may be of any type according to requirements and the state of the art.

Claims

CLAIMS1. Electronic cylinder lock (1) comprising a rotor (2), a cam (3) for actuating a lock-opening mechanism, a coupling element (4) slidably supported within the rotor (2) between a coupled and a decoupled position between said rotor (2) and said actuating cam (3), and an electromagnetic actuator (5, 6, 7, 8, 9, 16) for moving said coupling element (4) housed in said rotor (2), characterized in that said rotor (2) includes first means (100) for receiving electrical energy via electrical contact and second means (101) for receiving electrical energy via electromagnetic induction for supplying electrical energy to said electromagnetic actuator (5, 6, 7, 8, 9, 16).

2. Electronic cylinder lock (1) according to the preceding claim, characterized in that it includes a knob (102) and respectively a key (11) interchangeably engageable in a slot (12) of the rotor (2) for transferring energy to said first means (100) for receiving electrical energy and respectively to said second means (101) for receiving electrical energy.

3. Electronic cylinder lock (1) according to the preceding claim, characterized in that the knob (102) includes a knob shaft (102a) engageable in said slot (12), said knob shaft (102a) comprising first means (103) for transferring electrical energy via electrical contact to said first means (100) for receiving electrical energy, and in that the key (11) includes a key shaft (11a) engageable in said slot (12), said key shaft (I la) comprising second means (104) for transferring electrical energy via electromagnetic induction to said second means (101) for receiving electrical energy.

4. Electronic cylinder lock (1) according to the preceding claim, characterized in that said first means (103) for transferring electrical energy comprise twoelectrical terminals (105, 105') at different electrical potentials, and said first means (100) for receiving electrical energy comprise two electrical contact pins (107, 107') protruding into said slot (12) of the rotor (2) for engagement with said two electrical terminals (105, 105').

5. Electronic cylinder lock (1) according to any of claims 3 and 4, characterized in that said second means (104) for transferring electrical energy comprise a primary electrical coil (108), and said second means (101) for receiving electrical energy comprise a secondary electrical coil (109).

6. Electronic cylinder lock (1) according to any of claims from 3 to 5, characterized in that said first means (103) for transferring electrical energy are connected to an energy harvesting system housed inside the knob (102).

7. Electronic cylinder lock (1) according to any of claims from 3 to 5, characterized in that said first energy means (103) for transferring electrical energy are configured for the connection to an external electrical energy source outside the knob (102).

8. Electronic cylinder lock (1) according to any of claims from 2 to 7, characterized in that it includes automatic locking means of said knob (102) into said slot (12).

9. Electronic cylinder lock (1) according to the preceding claim, characterized in that said automatic locking means comprise an elastic element (111) and a locking pin (110) normally positioned in a locking position by the action of said elastic element (111) and movable between a locking and an unlocking position.

10. Electronic cylinder lock (1) according to the preceding claim, characterized in that said locking pin (110) in the locking position protrudes outside from a slidingseat (113) in the knob shaft (102a) and engages a locking seat (112) formed in the rotor (2) and opening into the slot (12).

11. Electronic cylinder lock (1) according to any of claims from 8 to 10, characterized in that it includes means for unlocking said knob (102) from said slot (12).

12. Electronic cylinder lock (1) according to the preceding claim, characterized in that said unlocking means comprise a rod (114) movably supported by the knob (102), with one motion-engaging end (115) accessible from outside the knob (102) and one shaped end (116) for moving said locking pin (110) reversibly between the locking position and unlocking position.

13. Electronic cylinder lock (1) according to the preceding claim, characterized in that said rod (114) is rotatable about itself and said shaped end (116) is formed by an eccentric cam slidably engaged in a buttonhole (118) provided in the locking pin (HO).

14. Electronic cylinder lock (1) according to any preceding claims, characterized in that said electromagnetic actuator comprises an electric motor (16), a rotary element (5) drivable in rotation by the electric motor, and magnetic coupling means between said rotary element (5) and said sliding coupling element (4), where said magnetic coupling means include at least one primary permanent magnet (6, 7) fixed to said rotary element (5) and at least one secondary permanent magnet (8, 9) fixed to said sliding coupling element (4).

Images