AU2018250460A1 - A lock cylinder - Google Patents

Abstract

A lock cylinder (10) to activate an associated lock, including a casing (12), a shaft assembly comprising a shaft (16) and user gripping portions fixed to the shaft so that the user can grip the gripping portion to cause angular movement of the shaft about a longitudinal axis (15) of the shaft. A cam member (21) is mounted for angular movement about said axis, and to cause operation of the lock. A clutch assembly (19) is operatively associated with the shaft and cam member. A controller (42) and an electric motor (33) are operatively associated with the clutch (19) to change the clutch between a first configuration connecting the shaft and cam member so that the shaft drives the cam member to cause said angular movement, and a second configuration in which the shaft is not operatively associated with the cam member. Fig. 1 VII: c-Zr (fl (Nfl a

Description

A LOCK CYLINDER

FIELD [0001] The present invention relates to electrically operated lock cylinders.

BACKGROUND [0002] Traditionally locks that were key operated, had a cylinder that incorporated a barrel within which a key was inserted. The key was turned to cause angular movement of the barrel that then operated the lock mechanism.

[0003] As opposed to key operated locks, there are now available locks that have a user operated portion that provides access control, such as a key pad, that when correctly operated causes operation of an electronic lock.

[0004] A disadvantage of the above discussed locks is that they are not interchangeable.

OBJECT [0005] It is the object of the present invention to overcome or substantially ameliorate the above disadvantage.

SUMMARY OF INVENTION [0006] There is disclosed herein a lock cylinder to activate an associated lock, the lock cylinder including:

a casing;

a shaft assembly including:

a shaft having a longitudinal axis and being mounted in the casing so as to be movable angularly about the axis; and a first user gripping portion fixed to the shaft so that the user can grip the gripping portion to cause angular movement of the shaft about the axis;

a cam member mounted for angular movement about said axis, with movement of the cam member being provided to cause operation of the lock;

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2018250460 18 Oct 2018 a clutch assembly operatively associated with the shaft and cam member, the clutch assembly having a first configuration connecting the shaft and cam member so that the shaft drives the cam member to cause said angular movement, the clutch having a second configuration in which the shaft is not operatively associated with the cam member to drive the cam member;

an electric motor operatively associated with the clutch to change the clutch between the first and second configurations of the clutch;

controller operatively connected to the motor to cause operation thereof to cause the clutch to change between the first and second configurations of the clutch; and wherein the shaft assembly provides a cavity within which a battery is to be located.

[0007] Preferably, the lock cylinder provides electrical coupling of the battery with the controller.

[0008] Preferably, the lock cylinder includes a first user operated portion electrically connected to the controller, with the user operated portion being manipulated by the user to cause the controller to operate the motor.

[0009] Preferably, the first user operated portion is disposed on the first gripping portion so that the user can grip the user operated portion to cause angular movement of the shaft.

[0010] Preferably, the user operated portion includes a key pad.

[0011] Preferably, the first a second user gripping portion is disposed at or adjacent a first end of the shaft.

[0012] Preferably, a second user gripping portion is disposed at or adjacent a second end of the shaft opposite said first end.

[0013] Preferably, the lock cylinder includes a second user operated portion electrically connected to the controller, with the second user operated portion being manipulated by the user to cause the controller to operate the motor.

[0014] Preferably, the gripping portion is a handle or a knob attached.

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2018250460 18 Oct 2018 [0015] Preferably, the shaft provides the cavity within which a battery is to be located.

[0016] Preferably, the shaft is tubular so as to provide said cavity.

[0017] Alternatively, the user operated portion provides a cavity within which a battery is to be located, with the lock cylinder providing electrical coupling of the battery with the controller.

[0018] Preferably, the clutch assembly includes a clutch part, the clutch part being mounted on the shaft for angular movement and longitudinal movement relative to the shaft, with the clutch part being movable between a first position and a second position, the clutch part in the first position coupling the shaft and cam member so that the shaft drives the cam member, with the clutch part in the second position not operatively engaged with the cam member.

[0019] Preferably, the electric motor is a solenoid and the cylinder further includes a lever pivotally mounted in the casing for angular movement about an axis transverse relative to the shaft, with the lever being caused to move angularly by operation of the solenoid, with the lever also being engaged with the clutch part to cause the movement thereof between the first and second positions of the clutch part.

[0020] Preferably, the casing provides a cavity that receives the solenoid and controller, with the cavity being spaced laterally relative to the shaft.

[0021] Alternatively, the clutch assembly includes a clutch part and a locking pin mechanism, the clutch part being mounted on the shaft for concurrent rotation therewith, and wherein the locking pin mechanism includes a locking pin moveable between an first position and a second position, wherein in the first position the locking pin extends from the clutch part to engage the cam member so that the shaft drives the cam member and cause said angular movement, and wherein in the second position, the locking pin is retracted into the clutch part so that the cam member freely rotates relative to the clutch part.

[0022] Preferably, the locking pin is housed in the clutch part and extendible from the clutch part to be received in complementary pin receiving apertures in the cam member.

[0023] Preferably, the locking pin is configured to extend radially from the clutch part.

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2018250460 18 Oct 2018 [0024] Preferably, herein the locking pin mechanism is a ball lock pin mechanism and the locking pin is an elongate ball lock pin.

[0025] Preferably, the electric motor is a solenoid.

[0026] Alternatively, the electric motor is a rotational electric motor.

BRIEF DESCRIPTION OF DRAWINGS [0027] Preferred forms of the present invention will now be described by way of example with reference to the accompanying drawings wherein:

[0028] Figure 1 is a schematic parts sectioned isometric of a lock cylinder;

[0029] Figure 2 is a part exploded isometric view of the lock cylinder of Figure 1;

[0030] Figure 3 is a schematic end elevation of the lock cylinder of Figure 1;

[0031] Figure 4 is a further schematic end elevation of the lock cylinder of Figure 1;

[0032] Figure 5 is a schematic parts sectioned side elevation of the lock cylinder of Figure 1 sectioned along the line 9-9 of Figure 3, with a clutch assembly engaged;

[0033] Figure 6 is a schematic sectioned side elevation of the lock of Figure 1, sectioned along the line 10-10 of Figure 4, with the clutch assembly engaged;

[0034] Figure 7 is a schematic parts sectioned side elevation of the lock of Figure 1, sectioned along the line 9-9 of Figure 3, with the clutch assembly disengaged;

[0035] Figure 8 is a schematic sectioned side elevation of the lock assembly of Figure 1, sectioned along the line 10-10 of Figure 4, with the clutch assembly disengaged;

[0036] Figure 9 is a schematic parts sectioned isometric of another lock cylinder;

[0037] Figure 10 is a part exploded isometric view of the lock cylinder of Figure 9;

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2018250460 18 Oct 2018 [0038] Figure 11 is a detailed part exploded isometric view of the clutch assembly of Figure 10;

[0039] Figure 12 is a detailed part exploded isometric view of a knob assembly of Figure 10;

[0040] Figure 13 is a detailed part exploded isometric view of a knob assembly of Figure 10;

[0041] Figure 14 is a schematic end elevation of the lock cylinder of Figure 9; and [0042] Figure 15 is a schematic sectioned side elevation of the lock of Figure 9, sectioned along the line 15-15 of Figure 14.

DESCRIPTION OF EMBODIMENTS [0043] In the accompanying drawings there is schematically depicted a lock cylinder 10. In this embodiment the lock cylinder 10 is configured to be retrofitted into a door that was to receive a key operated lock cylinder.

[0044] The lock cylinder 10 includes a housing 11 providing a casing 12, a first sleeve 13 and a second sleeve 14. The sleeves 13 and 14 are generally cylindrical in configuration and have a central longitudinal axis 15.

[0045] Mounted for relative rotation about axis 15 is a shaft assembly including a drive shaft 16, and first and second user gripping portions attached to opposite ends of the shaft. The user gripping portions are in the form of knobs, and are configured to be gripped and rotated by a user to cause angular movement of the shaft.

[0046] The shaft assembly passes longitudinally through and is supported by the sleeves 13 and 14 and provides a housing 17 for receiving batteries 18. In this embodiment the drive shaft 16 includes a longitudinally extending cavity forming a housing within which a plurality of batteries 18 are located.

[0047] Mounted on the shaft 16 is a clutch assembly 19 including a clutch part 20. The clutch part 20 engages a cam member 21. The cam member 21 includes a cylindrical portion 22 and a cam projection 23.

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2018250460 18 Oct 2018 [0048] The part 20 and cam member 21 are cylindrical in configuration and are slidably mounted on the shaft 16 so as to be in slidable contact with the outer surface of the shaft 16.

[0049] The part 20 and cam member 21 are located between the sleeves 13 and 14, with the casing 11 having a slot 26 within which the projection 23 can be received. The cam member 21 is movable angularly about the axis 15, but cannot move longitudinally thereof. In contrast, the part 20 is slidably mounted on the shaft 16 as to be slidable longitudinally thereof, as well as movable angularly thereabout.

[0050] The part 20 has end projections 27 and end recesses 28 that match end projections 29 and end recesses 30 of the cam member 21. The part 20 is slidable on the shaft 16 in the longitudinal direction 31 to provide for engagement of the projections 27 in the recesses 30 and the projection 29 in the recesses 28 so that the part 20 and cam member 21 are coupled so as to move angularly in unison about the shaft 16, and therefore angularly about the axis 15. In doing so, when the cam member 21 moves angularly about the axis 15, the projection 23 also moves angularly about the axis 15 to cause operation of an associated lock.

[0051] The part 20 also has an annular groove 32 that is associated with a solenoid 33. The solenoid 33 includes a coil 34 and a shaft 35. The end extremity of the shaft 35 is coupled to a pivotally mounted lever 36 that is movable angularly about a transverse axis 37, with the lever 36 having a pair of arms 38 slidably engaged in the angular groove 32. Angular movement of the lever 36 about the axis 37 causes sliding movement of the part 20 in the direction 31. The axis 37 is transverse relative to the shaft 16 and axis 15.

[00010] The above movement of the part 20 in the direction 31 causes coupling (first configuration) and decouples (second configuration) the projections 27 in the recesses 30, and the projections 29 in the recesses 28. Accordingly, operation of the solenoid 33 couples and decouples the part 20 with respect to the cam member 21, that is the solenoid 33 connects and disconnects the cam member 21 with respect to the shaft 16.

[0052] The part 20 has internal slots 39 that slidably receive projection 25 of the shaft 16, so that the part 20 moves angularly with the shaft 16. Accordingly, when the clutch assembly 19 is engaged angular movement of the shaft 16 will cause angular movement of the cam member 21.

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2018250460 18 Oct 2018

When the clutch assembly 19 is not engaged, the part 20 will not cause angular movement of the cam member 21 when the shaft 16 is moved angularly about the axis 15.

[0053] The solenoid 33 is mounted in a cavity 40 in the housing 11 so as to be securely held therein.

[0054] Also housed within the housing 11, and held in position by means of a cap 41, is a printed circuit board (controller) 42. The printed circuit board 42 is coupled to the solenoid 33 by means of a cable 43.

[0055] Located adjacent the batteries 18 is a battery terminal connector 44 that has internal wires that engage opposite ends of the batteries 18 so as to electrically couple the batteries 18 to a conductor 45 that engages the printed circuit board 42 to provide power thereto. Conductor 45 is received within a slot 46 in the shaft 16 but is slidable relative thereto.

[0056] Fixed to opposite ends of the shaft 16 are first and second user operated portions (knobs) including key pads 47 and 48. Each key pad 47 and 48 is provided with a plurality of buttons 49 that are electrically coupled to a further printed circuit board 50 (coupled to the batteries 18) so that upon a user engaging (in a required sequence) the buttons 49, the printed circuit board 50 will transmit a signal (indicative of the buttons 49 selected and activated) to the printed circuit board 42. The circuit boards 50 and 42 are coupled by means of contact assemblies 51 and 52. The contact assemblies 51 and 50 are electrically engaged when the shaft 16 is in a required position (home position). In that regard it should be appreciated the contact assembly 52 is located in a recess 53 in the shaft 16 so as to move angularly therewith. The printed circuit board 50 is electrically coupled to the contact assembly 52. The contact assembly 51 is electrically coupled to the printed circuit board 52. When the shaft 16 is in the home position, the printed circuit board 50 communicates with the printed circuit board 52.

[0057] When a predetermined sequence of buttons 49 is activated, the polarity of the coil 42 is changed to engage or disengage the part 20 with the cam member 21.

[0058] When the clutch assembly 19 is engaged (Figures 5 and 6), a user can grip the key pad 47 and cause rotation of the shaft 16 to cause angular movement of the projection 23 and therefore operate the associated lock. When the clutch assembly 19 is disengaged (figures 7 and 8), a user

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2018250460 18 Oct 2018 is unable to move the projection 23, as the part 20 is not engaged with the cam member 21, and therefore the associated lock is isolated from operation of the cylinder assembly 10. Manipulation of the key pad 37, and angular movement of the shaft 35 will not cause movement of the cam member 21.

[0059] The shaft 16 is fixed to the key pad 48 by means of a collar 53 into which the shaft 16 projects. The key pad 47, like the key pad 48 has a collar 53 and printed circuit board 50 although not illustrated.

[0060] The contact assembly 51 is coupled electrically to an electric socket 54 that receives the printed circuit board 42 to electrically couple the circuit board 52 to the contact assembly 51.

[0061] The casing 12 provides a cavity 55 including a first cavity portion 56 and a second cavity portion 57. The cavity portion 56 receives the printed circuit board 52, while the cavity portion 57 receives the solenoid 33. The cavity 55 is displaced laterally relative to the shaft 16.

[0062] The above described lock cylinder 10 can be used to replace a conventional key operated cylinder.

[0063] Another lock cylinder 110 in accordance with the invention is shown in Figures 9-13. As with the lock cylinder 10 shown in Figure 1, lock cylinder 110 is configured to be retrofitted into a door that was to receive a conventional key operated lock cylinder.

[0064] The lock cylinder 110 includes a housing 111 providing a casing 112, a first sleeve 113 and a second sleeve 114. The sleeves 113 and 114 are generally cylindrical in configuration and have a central longitudinal axis 115.

[0065] Mounted for relative rotation about axis 115 is a shaft assembly including a drive shaft 116, and first and second user gripping portions (105 & 106) attached to opposite ends of the shaft. The user gripping portions are configured to be gripped and rotated by a user to cause angular movement of the shaft assembly.

[0066] The shaft assembly passes longitudinally through and is supported by the sleeves 113 and 114 and provides a housing 117 for receiving a battery 118. In this embodiment, the user gripping portions are in the form of knobs, one of which 105 includes battery housing 117. The

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2018250460 18 Oct 2018 drive shaft 116 provides a longitudinally extending cradle 107 for receiving and housing other components of the lock cylinder as will be described.

[0067] In other embodiments one or more of the user gripping portions (knobs) may be in the form of a handle or other lever or formation to enable a user to rotate the shaft assembly.

[0068] Mounted on shaft 116 is a clutch assembly 119 including a partially cylindrical clutch part 120. The clutch part is mated to the shaft 116 for concurrent rotation about the axis 115.

[0069] A cam member 121, including a cylindrical portion 122 and a cam projection 123 is located and longitudinally retained between sleeves 113 and 114. The casing 111 includes a slot

124 within which the projection 123 can be received.

[0070] The clutch part 120 and cam member 121 are aligned longitudinally, so that the clutch part is disposed within the cylindrical portion 122 of the cam member 121 with the drive shaft 116 extending therethrough. In this way the cam member 121 is rotatably mounted on clutch part 120 and supported by the drive assembly.

[0071] The clutch part 120 includes a longitudinal bore 125 for housing components of a ball lock pin mechanism for selectively coupling the clutch part to the cam member.

[0072] The ball lock pin mechanism includes a pair of elongate ball lock pins 126 retained within a respective pair of radial orientated apertures 127 in the clutch part; a ball lock piston 128 disposed within the longitudinal bore 125; and a drive means for moving the ball lock piston 128 within the bore 125 by a resilient linkage.

[0073] The drive means includes a motor 133, a drive shaft 134 a helical spring 136 axially mounted on the drive shaft 134 and a radially extending drive pin 135 for engaging the helical spring 136. In this embodiment the motor 133 is a rotational drive electric motor. Rotational drive from the motor is converted to linear drive to move the piston 128 via the driveshaft 134, drive pin 135 and coil spring 135. The drive pin extends between adjacent coils of the helical spring 136 so that rotation of the motor winds the pin around the coils of the spring in a first direction thereby compressing the spring against ball lock piston 128 to urge it along the bore

125 in the direction shown by arrow A.

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2018250460 18 Oct 2018 [0074] It will be appreciated, with reference to Figure 11, that urging the ball lock piston in the direction shown by arrow A, drives the lock piston 128 and particularly a tapered portion 129 of the lock piston toward the elongate ball lock pins 126 retained in the clutch part. Since the pins 126 have a length greater than the wall thickness of the clutch part, are pushed by the tapered portion 129 to extend from the apertures 127 proud of the outer surface of the clutch part. The extended pins are received in complementary pin receiving apertures 131 in the surrounding cylindrical portion 122 of cam member 121 thereby coupling the clutch part 120, to the cam member 121.

[0075] Further movement of the ball lock piston in the direction shown by arrow A, drives a cylindrical portion 130 of the lock piston 128 under the pins to fully extended the pins into respective pin receiving apertures 131. In this position, the clutch assembly is in a first configuration whereby the shaft assembly and the cam member are lockingly connected so that the shaft assembly may be rotated to drive the cam projection 123 for activating an associated lock.

[0076] It should be noted that the pins 126 are only able to extend into the apertures 131 in the cylindrical portion 122 when the cam member 121 is at a predetermined locking alignment with the clutch part 120. Should the motor be operated to urge the piston in direction A when the cylindrical portion 122 and cam member 121 are not in locking alignment, the pins will merely press against the inner surface of the cylindrical portion 122 of cam member 121 without coupling the clutch part 120, to the cam member 121. Furthermore, since the pins are prevented from extending radially outwardly, the inner end of each pin remains in the bore thereby blocking movement of the piston 128 in the direction A.

[0077] Should this occur, the resilient linkage between the motor 133 and lock piston 128 provided by the spring 135 tends to preload, rather than force, the ball lock pin mechanism (ball lock pins 126 and piston 128) so that the clutch assembly is biased toward the first configuration, thereby reducing the risk of damage to the clutch assembly and motor. Upon relative rotation of the shaft assembly and the cam member 121 into the locking position, the clutch assembly will snap into the first configuration.

[0078] In order to disengage the clutch assembly, the motor 133 is activated to rotate shaft 134 and wind the drive pin 135 around the coils of the spring in a second direction thereby

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2018250460 18 Oct 2018 decompressing the spring to urge the piston along the bore 125 in the direction shown by arrow B. This releases the ball lock pins 126 so that they may retract radially from the respective pin receiving apertures 131 in the surrounding cylindrical portion 122 of cam member 121 and into the clutch part 120 thereby disengaging the cam member 121 from the clutch part 120 and allowing free rotation therebetween. In this position, the clutch assembly is in a second configuration whereby the shaft is not operatively associated with the cam member to drive the cam member. That is to say, with the clutch assembly in the second configuration, rotation of the shaft assembly will not drive the cam projection 123 to operate an associated lock.

[0079] Housed within the drive shaft 116, is a main printed circuit board (PCB) 141 comprising a controller for controlling the electric functions of the lock including operation of motor 133. The main PCB 141 extends through drive shaft assembly and includes electrical connectors 143 at each end.

[0080] Referring to Figure 10, each of the first and second user gripping portions or knobs (105 & 106) includes, a knob assembly comprising a proximal axle portion 145 and a distal portion 146 which together form a knob housing for retaining a keypad 147 and respective keypad PCB 148.

[0081] Each axle portion 145 includes an axle 149 for extending into a respective sleeve (113 & 114) of the housing 111 and to engage with a respective end of the shaft 116. The axle 149 includes a rotational drive formation 150 which matches a corresponding rotational drive formation 151 on the shaft thereby enabling rotational drive to be transmitted between the knob assembly and the shaft 116. A circumferential channel 152 on each axle 149 is provided for receiving the end of a threaded pin 153 inserted into respective bores 154 in the housing 111 to secure the axle portion 145 within a respective sleeve while allowing for relative rotation between the drive shaft assembly and housing 111.

[0082] In this embodiment, one of the knobs 105 (see Figure 12) is configured to provide a cavity for housing a battery 118 while the other knob 106 (see Figure 13) includes a port 155 for receiving an external electrical connector in the form of a micro USB. Accordingly, the axle portion of the battery housing knob 105 includes an elongated body 156 comprising a cavity for receiving battery 118. Located adjacent the battery 118 is a battery PCB 157 including electrical

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2018250460 18 Oct 2018 connectors at each end to electrically couple with connectors on the respective keypad PCB 148 in the knob housing, and the main PCB 141.

[0083] In contrast, the axle portion of the USB housing knob includes a USB port 155 for receiving an external USB plug, a USB PCB 158 having a USB connector and a USB port cover 159. The USB PCB 158 is mounted directly to the main PCB 141 and the respective keypad PCB 148 in the knob housing includes an electrical connector for electrically connecting to the electrical connector on the main PCB 141.

[0084] Each key pad 147 is provided with a plurality of buttons 160 that are electrically coupled to a respective keypad PCB 148 so that upon a user engaging (in a required sequence) the buttons 160, the keypad PCB 148 will transmit a signal (indicative of the buttons 160 selected and activated) to the main PCB 141.

[0085] When a predetermined sequence of buttons 160 is activated, a controller on the main PCB 141 activates the electric motor to engage or disengage the part 120 with the cam member 121.

[0086] When the clutch assembly 119 is engaged, a user can grip either knob and cause rotation of the shaft 116 to cause angular movement of the projection 123 and therefore operate the associated lock. When the clutch assembly 119 is, a user is unable to move the projection 123, as the part 120 is not engaged with the cam member 121, and therefore the associated lock is isolated from operation of the cylinder assembly 110. Manipulation of the key pad 147, and angular movement of the shaft assembly will not cause movement of the cam member 121.

[0087] In some embodiments, the lock cylinder includes a wireless transceiver operatively connected to the controller to allow wireless signals to be received from and/or transmitted to an external wireless device such as a smart phone and allow for wireless remote control of the lock.

[0088] The above described lock cylinder 110 can be used to replace a conventional key operated cylinder.

Claims (21)

1. A lock cylinder to activate an associated lock, the lock cylinder including:

a casing;

a shaft assembly including:

a shaft having a longitudinal axis and being mounted in the casing so as to be movable angularly about the axis; and a first user gripping portion fixed to the shaft so that the user can grip the gripping portion to cause angular movement of the shaft about said axis;

a cam member mounted for angular movement about said axis, with movement of the cam member being provided to cause operation of the lock;

a clutch assembly operatively associated with the shaft and cam member, the clutch assembly having a first configuration connecting the shaft and cam member so that the shaft drives the cam member to cause said angular movement, the clutch having a second configuration in which the shaft is not operatively associated with the cam member to drive the cam member;

an electric motor operatively associated with the clutch to change the clutch between the first and second configurations of the clutch;

controller operatively connected to the motor to cause operation thereof to cause the clutch to change between the first and second configurations of the clutch; and wherein the shaft assembly provides a cavity within which a battery is to be located.

2. A lock cylinder according to claim 1 wherein the lock cylinder provides electrical coupling of the battery with the controller.

3. A lock cylinder according to claim 1 or 2 wherein, the lock cylinder includes a first user operated portion electrically connected to the controller, with the user operated portion being manipulated by the user to cause the controller to operate the motor.

4. A lock cylinder according to claim 3 wherein, the first user operated portion is disposed on the first gripping portion so that the user can grip the user operated portion to cause angular movement of the shaft.

5. A lock cylinder according to claim 5 wherein, the user operated portion includes a key pad.

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6. A lock cylinder according to any one of the preceding claims wherein the first a second user gripping portion is disposed at or adjacent a first end of the shaft.

7. A lock cylinder according to claim 6 wherein a second user gripping portion is disposed at or adjacent a second end of the shaft opposite said first end.

8. A lock cylinder according to claim 7 including a second user operated portion electrically connected to the controller, with the second user operated portion being manipulated by the user to cause the controller to operate the motor.

9. A lock cylinder according to any one of the preceding claims wherein the gripping portion is a handle or a knob attached.

10. A lock cylinder according to any one of the preceding claims wherein the shaft provides the cavity within which a battery is to be located.

11. A lock cylinder according to claim 10 wherein the shaft is tubular so as to provide said cavity.

12. A lock cylinder according to any one of claims 1 to 9 wherein, the user operated portion provides a cavity within which a battery is to be located, with the lock cylinder providing electrical coupling of the battery with the controller.

13. A lock cylinder according to any one of the preceding claims wherein the clutch assembly includes a clutch part, the clutch part being mounted on the shaft for angular movement and longitudinal movement relative to the shaft, with the clutch part being movable between a first position and a second position, the clutch part in the first position coupling the shaft and cam member so that the shaft drives the cam member, with the clutch part in the second position not operatively engaged with the cam member.

14. A lock cylinder according to claim 13 wherein the electric motor is a solenoid and the cylinder further includes a lever pivotally mounted in the casing for angular movement about an axis transverse relative to the shaft, with the lever being caused to move angularly by operation of the solenoid, with the lever also being engaged with the clutch part to cause the movement thereof between the first and second positions of the clutch part.

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15. A lock cylinder according to claim 14 wherein, the casing provides a cavity that receives the solenoid and controller, with the cavity being spaced laterally relative to the shaft.

16. A lock cylinder according to any one of claims 1 to 12 wherein the clutch assembly includes a clutch part and a locking pin mechanism, the clutch part being mounted on the shaft for concurrent rotation therewith, and wherein the locking pin mechanism includes a locking pin moveable between an first position and a second position, wherein in the first position the locking pin extends from the clutch part to engage the cam member so that the shaft drives the cam member and cause said angular movement, and wherein in the second position, the locking pin is retracted into the clutch part so that the cam member freely rotates relative to the clutch part.

17. A lock cylinder according to claim 16 wherein the locking pin is housed in the clutch part and extendible from the clutch part to be received in complementary pin receiving apertures in the cam member.

18. A lock cylinder according to claim 17 wherein the locking pin is configured to extend radially from the clutch part.

19. A lock cylinder according to any one of claims 16 to 18 wherein the locking pin mechanism is a ball lock pin mechanism and the locking pin is an elongate ball lock pin.

20. A lock cylinder according to any one of the preceding claims wherein the electric motor is a solenoid.

21. A lock cylinder according to any one of the preceding claims wherein the electric motor is a rotational electric motor.