Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B43/00—Time locks
  • E05B43/005—Timer devices controlling electrically operated locks
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
  • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
  • E05B47/0009—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with thermo-electric actuators, e.g. heated bimetals

Definitions

• the present invention relates to a device for controlling the timed opening of a lock, for example of a safe lock comprising at least one locking bolt, this device comprising a housing containing at least one mechanism for locking the bolt and an electronic device for controlling the locking mechanism.
• the second systems make it possible to define a time interval which for example has a duration of the order of 15 minutes, during which it is impossible to open a lock. trunk, this interval being between the moment of an opening request and the moment of the effective opening of this lock.
• These systems called "anti hold-up" have an essentially dissuasive vocation since they prevent an action of the "lightning" type of armed thieves.
• the opening of the lock being controlled by a timing mechanism, usually of the clock type, nothing allows a premature opening and the bandits are forced either to give up their action if they do not want to take the risk of waiting for the moment where the opening becomes possible, either to wait for this moment with all the risks that this entails.
• the present invention proposes to overcome this drawback by providing a device as defined in the preamble, which reliably ensures a timed opening of a security lock and the safety of use of which is guaranteed.
• the device according to the invention is characterized in that the locking mechanism comprises a trigger module, a blocking module and a security module arranged to allow the timed opening of the lock in the event of a device failure. electronic control of the locking mechanism.
• the trigger module can comprise a cam and a control slide secured to the bolt of the lock, the slide comprising a pin designed to lock the control slide in the locked position, and the cam comprising a ramp designed to cooperate with said pin to cause a change of state of a contactor.
• the cam is advantageously mounted on a support plate and is pivotable about an axis mounted on this support plate, and said support plate is provided with an elongated recess in which is engaged the pin secured to the control slide.
• the cam preferably comprises a control edge provided with a notch and said contactor is provided with a pivoting arm carrying a follower roller, this roller being arranged to be in abutment on said control edge and / or to enter said notch , thus causing said change of state of the contactor.
• the blocking module comprises a hook, a lever pivoting around a fixed axis, a return spring and a polarized electromagnet, this lever comprising an arm arranged to be brought into a first position, attracted by the electromagnet when the module is armed, and to be brought into a second position, under the effect of the return spring, when the module is disarmed.
• the hook is pivotable around the axis mounted on the support plate and is provided with a notch arranged to lock the control slide in the locked position.
• the lever is preferably pivotable. around the axis mounted on the support plate.
• the arm of the sink may include an inclined ramp designed to cooperate with the pin of the control slide, to return said arm to its first position after it has been brought into its second position by the return spring.
• the biocage module hook carries a pin and the pivoting lever is provided with an opening in which this pin is engaged, so that the pivoting of said lever around the axis causes the pivoting of the hook around this same axis.
• the device preferably comprises a return spring, one end of which is attached to the pin and the other end of which is attached to the fixed pin carried by the support plate, this return spring being arranged to urge the hook towards the locking position.
• the opening of the pivoting lever is so advantageous diameter "bigger than the pin, so as to allow pivoting of the hook when the ievier is in its first position.
• Said hook comprises a ramp arranged to engage the pin to lift the hook when the control slide is returned to the lock closed position.
• the security module advantageously comprises a toothed wheel and two arms respectively provided with slots, these arms being integral with a bimetallic strip arranged to be subjected to thermal cycles and the slots being respectively engaged with teeth substantially diametrically - -f- -
• the opposite side of the toothed wheel said wheel having an elongated opening in which is engaged the pin secured to the hook.
• the length of said opening, the dimension and the number of teeth of the toothed wheel and the duration of a thermal cycle of the bimetallic strip are determined in such a way that the tilting of the hook around its pivot axis takes place after a determined delay. which can for example be at least equal to the duration of the opening delay defined by the electronic device.
• the bimetal strip is preferably mounted, by one of its ends, on a fixed support, in such a way that its other end moves, following its deformation during each thermal cycle, by carrying with it one of the arms carrying the 'one of said slots.
• the trigger module comprises a rocker and a control slide secured to the bolt of the lock, the slide comprising a pin designed to lock the control slide and the rocker comprising a ramp designed in the locked position to cooperate with said pin to cause a change of state of a contactor.
• Said rocker preferably carries an electromagnet and the rocker is biased in a position determined by a return spring, one end of which is fixed to a pin secured to the support plate.
• FIG. 1 represents an overall perspective view of the device according to the invention, associated with a security lock
• FIG. 2 represents an exploded perspective view of the locking mechanism of the device according to the invention
• FIGS 3 and * represent partial views illustrating the operation of the trigger module of the locking mechanism of the device according to the invention
• FIGS. 5, 6 and 7 represent partial views illustrating the operation of the blocking module of the locking mechanism of the device according to the invention
• FIGS. 8 and 9 represent partial views illustrating the operation of the security module of the locking mechanism of the device according to the invention.
• FIG. 10 illustrates the electronic control circuit in the form of a block diagram
• FIG. 11 illustrates an overall exploded perspective view of an alternative embodiment of the locking mechanism of the device according to the invention
• FIGS. 12 and 13 represent partial views illustrating the operation of the blocking module of the locking mechanism of the device represented by FIG. 11,
• FIGS. 1 ⁇ +, 15 and 16 represent detailed views illustrating the operation of the trigger module of this same mechanism
• FIGS 17 and 18 show detailed views illustrating the operation of the security module of this same mechanism.
• the device comprises a housing 10 which contains or adapts to a conventional security lock 11 equipped with at least one bolt 12 and actuated by a key 13, a locking mechanism ⁇ of this lock and an electronic circuit 15 for controlling the locking mechanism.
• This electronic circuit can be housed in the housing 10 or in another housing separate from the previous one.
• the locking mechanism shown in exploded view comprises a frame 20 comprising a base plate 20a and two lateral guides 20b, on which are mounted the various components which constitute this mechanism. In fact, these components essentially form three separate modules which are the trigger module 21, the blocking module 22 and the security module 23 which completes the system and allows the opening of the lock in the event of failure of the electronic circuit. .
• the operation of the trigger module 21 will be described with reference to Figures 3 and k.
• the operation of the blocking module 22 will be described with reference to FIGS. 5 to 7.
• the operation of the security module will be described with reference to FIGS. 8 and 9.
• the trigger module 21 essentially consists of a cam 25 and a control slide 26 made integral with the bolt 12 by a connecting rod 27 (see fig. 1).
• the control slide 26 carries a pin 28, substantially perpen ⁇ dicular to its plane which is engaged in a notch 29 of a hook 2k which is part of the blocking module and which is supported on an inclined ramp 30 of the cam 25.
• the hook 2k as well as the cam 25 are pivotally mounted about an axis 31 carried by a support plate 32 of the frame 20.
• the control slide 26 is mounted parallel to this plate so that the pin 28 can move axially inside an elongated recess 33 formed in this support plate.
• An electrical contactor 3k equipped with a movable arm 35 bears against a control edge 36 of the cam 25.
• This control edge is provided with a notch 37 which makes it possible to change the state of the contactor 3k.
• This pivoting allows the penetration of a roller 38 carried by the end 35 of the pivoting arm of the contactor 34 in the notch 37 and to cause the change of state of said contactor.
• this change of state causes the activation of the time delay which prevents the instantaneous opening of the lock. It therefore makes it possible to ensure one of the essential functions of the device according to the invention, namely to initialize the system at the time of an attempt to open a security lock. .
• Figs. 5 to 7 illustrate the blocking module 22.
• This module essentially comprises a lever kO pivoting around the axis 31, a polarized electromagnet kl and a return spring k2, and it cooperates with the trigger module described above .
• Fig. 5 shows this module in its locked armed position.
• the arm k3 of the lever kO has its end pressed against the electromagnet kl which, because it is polarized, that is to say comprises a permanent magnet, maintains this arm in this position as long as the coil of the electromagnet is not supplied with electric current.
• the traction exerted by the return spring k2 is calculated in such a way that it is less than the force exerted by the permanent magnet of the polarized electromagnet.
• Fig. 6 shows this module in its unlocked disarmed position.
• the contactor 3k controls the supply of the electromagnet k l.
• the induced magnetic field counteracts the magnetic field of the permanent magnet and the lever arm kO is released under the effect of the traction exerted by the spring k2.
• the hook 2k described above, which aims to retain the pin 28 and prevent the opening of the lock, carries a pin kk, perpendicular to its plane and which is engaged in an opening k5 formed in the lever kO. By tilting, pulled by the spring k2, this lever also makes the hook 2k pivot, which has the effect of releasing the pin 28.
• a return spring k6 is mounted between the pin kk and a fixed pin k7 fixed to the support plate 32.
• this spring of recall has a lower pulling force than that exerted by the spring k2, so that the lever remains, in this state, subjected to the action of said spring k2.
• Fig. 7 illustrates the blocking module 22 in the unlocked - reset position.
• the pin 28 integral with this slide moves in the direction of the arrow B and, during this movement, acts on the inclined ramp 48 of the arm k3 of the lever kO which switches in the direction of the arrow C.
• This displacement has the effect of returning the lever to its locked locked position shown in FIG. 5.
• the hook 2k returned by the spring k6 is also returned to its initial position.
• the blocking module 22, and more particularly the lever kO fulfills its locking function well since firstly it blocks the hook 2k in the closed position, secondly it ensures the pivoting of this hook which results in the release of the pin 28 and, in a third step, it allows the hook to return to its initial position. It will be noted that from this moment, the lever 40 returns to its armed position, which makes it available for a new operating cycle.
• the pin 28 When the lock is closed, the pin 28 must move in the opposite direction to that indicated by the arrow B. This is made possible by the existence of a ramp 49 at the end of the hook 24. Indeed , the pushing of the pin 28 causes the hook 24 to tilt about the axis 31 in the direction of the arrow D. This tilting is authorized thanks to the fact that the pin 44, engaged in the opening 45 of the lever 40, has a diameter much smaller than the dimensions of the opening 45. In practice, the hook 24 pivots enough to allow the pin 28 to pass, then is returned to its initial position by the return spring 46. In this position, represented by FIG. , behind the scenes of command 26 is blocked and the blocking module is locked and armed.
• Figs. 8 and 9 schematically illustrate the construction and the operating principle of the security module which constitutes a mechanical means making it possible to ensure the delayed opening of the lock in the event of failure of the electronic circuit.
• the actual security module essentially consists of a toothed wheel 50 and two arms 51 and 52 respectively provided with two slots 53 and 54, these arms being connected by a bimetallic strip 55 fixed by a support 56.
• the toothed wheel comprises a obiongue opening 57 in the form of a circular arc, in which is engaged the pin 44 secured to the hook 24.
• the function which this mechanism must fulfill is to pivot the hook 24 after a predetermined period of time and release the pin 28 to allow movement of the control slide 26 of the bolt of the lock.
• This function is obtained by the slots 53 and 54 which mesh the toothed wheel 50 in the manner of an escapement mechanism, well known in watchmaking.
• the slots are controlled by thermal cycles which deform the bimetallic strip 55.
• FIG. 8 shows this bimetallic strip at rest.
• the two slots 53 and 54 mesh the toothed wheel which is locked in position.
• Fig. 9 illustrates the bimetallic strip 55 when it undergoes heating by the 3oule effect, which is transmitted to it by a heating body 5S. Its upper end being secured to the fixed support 56, its free end 59 moves in the direction of the arrow E by driving the corresponding arm 52 and the slot 54.
• This deformation has the effect of rotating the toothed wheel 50 by one notch in the direction of arrow F.
• the arms 51 and 52 being elastic, at the moment when the slot 54 exerts a traction on the toothed wheel to rotate it by a notch, the opposite slot 53 lifts slightly to allow the passage of a wheel tooth.
• the electronic circuit essentially consists of a power supply 60 connected to the mains and transmitting for example a DC voltage of 5 V to a control unit 61 with microprocessor which is directly connected to the opening device 62 constituted by the electromagnet ensuring the release of the arm 43 from the lever 40 and to a display device 63 which makes it possible to display the state of the latter outside the lock, in the form of a light or sound signal.
• the contactor 34 which allows the acquisition of the data, that is to say to request the opening of the lock, is also directly connected to the control unit 61.
• the security module 23 is supplied by a device d external power supply and acts directly, on request, on the opening device 62. Note that this security module is not connected to the control unit 61 since its purpose is precisely to allow the opening of the lock in case of failure of this control unit.
• the locking mechanism comprises, as before, a frame 20 which consists of a support plate 32 and a stamped plate 32a which houses and guides the control slide 26. These two plates 32 and 32a are assembled by bolts, rivets 32b or by any other suitable means such as welding, gluing, crimping etc.
• the control slide carries a pin 28 which penetrates into a notch 29 of a hook 24 which is part of the blocking module and which is supported on an inclined ramp 30 of said rocker 70.
• the rocker is pivotable about an axis 31 carried by the support plate 32 of the frame 20.
• the control slide 26 is mounted parallel to this plate so that the pin can move axially inside an elongated recess 33 formed in the support plate 32.
• An electrical contactor 34 equipped with a movable arm 35 bears against the control edge 36 of the rocker 70.
• This control edge 36 is provided with a notch 37 which makes it possible to ensure the change of state of the contactor 34 .
• rocker 70 is biased in an initial position, represented by FIG. 12, by a return spring 42 fixed to a pin 42a mounted on the support plate 32.
• FIGS. 14 to 16 show the blocking module 22. It essentially comprises a hook 24 provided with the notch 29 in which the pin 28 can engage, and an electromagnet 41 carried by said rocker 70.
• FIG 14 shows this module in its locked position.
• the electromagnet 41 is not of the polarized type.
• the hook 24 blocks the pin so that the bolt cannot be pushed back.
• a return spring 46 fixed to a pin 47 secured to the plate 32 and to a pin 44 secured to the hook 24 tends to keep the hook in this locking position.
• FIGS. 17 and 18 illustrate the construction and principle of - operation of the security module 23.
• the latter essentially consists of a toothed wheel 50 and two elastic arms 51 and 52 respectively provided with two slots 53 and 54.
• the pin 44 integral with the hook 24, is engaged as previously in the oblong opening 57 of the toothed wheel.
• the arms 51 and 52 are carried by the ends of a bimetallic strip 55 which carries a heating body 58.
• the operation of this module is completely identical to that of the module described with reference to FIGS. 8 and 9.

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• Lock And Its Accessories (AREA)
• Switch Cases, Indication, And Locking (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=9356314

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• 1987
  • 1987-10-27 FR FR8715032A patent/FR2622237A1/fr not_active Withdrawn
• 1988
  • 1988-10-26 WO PCT/CH1988/000199 patent/WO1989003922A1/fr not_active Ceased
  • 1988-10-26 EP EP19880908927 patent/EP0338046A1/de not_active Withdrawn
  • 1988-10-26 JP JP63508257A patent/JPH02501937A/ja active Pending

Non-Patent Citations (1)

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