EP0283384A1 - Lock which can be automatically shut and opened - Google Patents

Abstract

Lock with automatic opening and closing, comprising at least one lock bolt (2) and one catch bolt (3) and a mechanism (6, 7) for the key actuation of the lock bolt (2) and of the catch bolt (3), characterised in that the mechanism (6, 7) for key actuation (8) is arranged on the outside of the lock, and in that it possesses, furthermore, means (20, 21, 22, 23, 27 to 34) actuated by an electric motor (35) driving the catch bolt (3) and lock bolt (2) according to a predetermined sequence, means (25, 26, 37, 38) for detecting the position of the lock bolt (2) and catch bolt (3) in the lock and in relation to the keeper, and means for actuating the electric motor (35) as a function of the state of said lock determined by said detection means. <IMAGE>

Description

The present invention relates to locks and relates more particularly to locks with automatic opening and closing.

Known locks of this type generally include a mechanism for actuating the bolt, the release of which is ensured by an electrical signal generated from a code entered on a keyboard.

However, locks of this type do not make it possible to obtain positive closing security, so that they are insufficient when it is desired that a room is actually closed after each use of the door.

The invention aims to remedy the drawbacks of locks with automatic opening and closing by creating a lock which is capable of being locked automatically after each use.

The invention also aims to create a lock of the aforementioned type, the night control of which is provided by an increased security system compared to the system used during the day.

Its subject is therefore a lock with automatic opening and closing comprising at least one dead bolt and a half-turn bolt, a key actuation mechanism for the dead bolt and the half-turn bolt, characterized in that the mechanism for key actuation is arranged exclusively on the outside of the lock and in that it further comprises means actuated by an electric motor for driving the bolt turn and the dead bolt on the inside of the lock according to a predetermined sequence , means for detecting the position of the dead bolt, and of the U-bolt, in the lock and relative to the strike and means for actuating the electric motor as a function of the state of said lock given by said detection means.

• - la Fig.1 est une vue schématique en pers­pective éclatée d'une serrure motorisée suivant l'in­vention;
• - la Fig.2 est une vue en élévation et en coupe à plus grande échelle de la serrure motorisée suivant l'invention montée sur un battant de porte;
• - la Fig.3 est une coupe suivant la ligne 3-3 de la Fig.2;
• - la Fig.4 est une coupe suivant la ligne 4-4 de la Fig.2;
• - la Fig.5 est une vue extérieure de face de la serrure suivant l'invention; et
• - la Fig.6 est un schéma électrique du cir­cuit de commande de la serrure suivant l'invention.

The invention will be better understood with the aid of the description which follows, given solely by way of example and made with reference to the appended drawings, in which:

• - Fig.1 is a schematic exploded perspective view of a motorized lock according to the invention;
• - Fig.2 is an elevational view in section on a larger scale of the motorized lock according to the invention mounted on a door leaf;
• - Fig.3 is a section along line 3-3 of Fig.2;
• - Fig.4 is a section along line 4-4 of Fig.2;
• - Fig.5 is an external front view of the lock according to the invention; and
• - Fig.6 is an electrical diagram of the control circuit of the lock according to the invention.

The lock shown in Fig.1 mainly comprises a trunk 1 in which are mounted displaceable in translation a dead bolt 2 and a U-bolt 3.

The dead bolt 2 is provided with an extension 4 provided with notches 5 which cooperate with an eccentric 6 which is part of a cylinder assembly 7 actuated by a key 8 of conventional type placed on the outside of the lock.

The extension 4 of the dead bolt 2 is further provided with locking notches 9 cooperating with a finger 10 fixed on a plate 12 movable in translation in the vertical direction and actuated by the eccentric 6.

The latch bolt 3 is carried by a rod 13 provided with an end head 14 engaged in a fork 15 secured to the trunk 1.

The rod 13 carries a flange 16 by means of which it is urged in the direction of retraction of the latch bolt 3 in the trunk 1, by a lever 17 or angle articulated on the extension 4 of the dead bolt 2.

A helical spring 19 for returning the bolt half-turn to the active position is placed on the rod 13 between the fixed fork 15 and the flange 16.

The lever 17 is also actuated by the eccentric 6.

A second eccentric 20 disposed opposite the eccentric 6 intended to actuate the bolts 2 and 3 is mounted at one end of an axle 21 which carries a toothed wheel 22 as well as an operating button 23 placed on the inside of the lock. The assembly formed by the eccentric 20, its axis 21, the wheel 22 and the button 23 replaces the conventional key locking system disposed opposite the cylinder assembly 7 in a conventional lock.

The toothed wheel 22 is integral with a cam 24 cooperating with two limit switches 25 and 26 intended to determine the angular travel of the toothed wheel 22. The contactor 25 gives the position of the eccentric 20 when the latter is disengaged from the notches 5 of the extension 4 of the dead bolt 2 while the contactor 26 gives the retracted position of the half-turn bolt 3. The cam 24 has a portion 24ª of smaller radius relating to the actuation of the half-turn bolt 3.

The toothed wheel 2 meshes with a pinion 27 carried by an axis 28 parallel to the axis 21 and on which is wedged a pinion 29 of larger diameter.

The pinion 29 in turn meshes with a pinion 30 of small diameter carried by a pin 21 on which is wedged a pinion 32 of larger diameter, the latter meshing with a pinion 33 of small diameter carried by the output shaft 34 d an electric motor 35 for driving the assembly.

The operating button 23 constitutes with the key actuation mechanism 6,7, emergency means for mechanical actuation of the lock in the event of a power supply failure.

The lock in Fig. 1 is completed by a contactor 36 for indicating the low position of the eccentric 6 released from the notches 5 of the extension 4 of the dead bolt 2, by a contactor 37 of the strike plate intended to indicate that the deadbolt is at the end of the closing stroke and by a half-turn bolt switch 38 intended to indicate that the half-turn bolt is in the extended position.

In Fig.2 is shown in more detail an embodiment of the motorized lock according to the invention in place on a door leaf P.

This lock is of the type with several bolts actuated from the mechanism housed in the trunk 1 by means of rods T.

The electric motor 35 and the reducer constituted by the pinions and toothed wheels for transmitting the movement of the output shaft 34 of said motor to the axis 21 which carries the eccentric 20 are mounted in a housing 40 which contains the trunk 1, the plate 18 thereof having dimensions such that it also forms the bottom of the housing 40.

In the housing 40 is mounted a printed circuit board 41 for controlling the lock fixed to the housing by balusters 42. A piece 43 of positioning in the housing 40 of the axis 21 of the toothed wheel 22 with cam 24, of the axes 28 and 31, of the pinions 27, 29 and 30, 32 and of the motor output shaft 34 is also fixed in the housing 40 by screws (not shown). The axes 21, 28, 31 are mounted in the positioning part 43 by means of respective bearings 44, 45, 46 while corresponding bearings 47, 48, 49 for the other ends of these axes and a bearing 50 for the the output shaft 34 of the motor 35 are formed in a thicker part 51 of the housing 40.

In the housing 40 is further provided a recess 52 in which are housed a switch 53 with push button for opening the lock and an electric key switch 54 (Fig. 5), for changing the operating mode during the day or night lock.

On the face of the opening panel P opposite to the housing 40 is fixed a key housing 55 for controlling the lock using a code.

Fig.3 mainly shows the position of the various switches of the lock according to the invention.

There are shown in phantom in the housing 40, the electric drive motor 35, the pinions 27, 29, 30, 32 of the reduction gear, the cam 24 associated with the eccentric 20 and the dead bolt provided with its extension 4 notched 5.

Cam 24 is associated with two microswitches corresponding to contactors 25 and 26 shown in Fig.1.

A third microswitch corresponding to the contactor 37, controlled by the extension 4 of the dead bolt 2 to detect when the bolt 2 is in the extended position.

We also see in Fig.3, the detent bolt 3 turn 3 released as well as the detector 36 indicating the released position of the notches 5 of the dead bolt 2 of the eccentric 6 of the key cylinder assembly 7 (Fig.1) and a closed door detector 57 consisting of a reed switch placed in the housing 40 opposite a permanent magnet 58 placed in a keeper 59 secured to the door frame (Fig.5) .

The actuation means of the switch 37 by the eccentric 6 are shown more clearly in FIG. 2. They comprise a support 60 fixed on the trunk 1 and in which a rod 61 is slidably mounted recalled by a spring 62 and fixed at an intermediate point to a finger 63 for actuating the switch 36.

In Fig.4, there is shown in more detail the mechanism of the motorized lock according to the invention.

The dead bolt 2 and the half-turn bolt 3 housed in the trunk 1 are driven by a conventional mechanism. This mechanism compromises a reference 64 linked to the extension 4 of the dead bolt 2 by a finger 65 which drives it in rotation.

The reference is in turn linked to connecting rods 66,67 by means of sets of grooves 68 and fingers 69 carried by the connecting rods, the latter being connected at their ends opposite to the fingers 69, to the respective rods T.

In Fig.6, there is shown the electrical circuit for controlling the lock according to the invention carried by the printed circuit board 41 mounted in the housing 40 (Fig.2).

In this circuit, there are connected between two supply lines with low direct voltage, for example 48 V, the contactor 25 of the position released from the eccentric 20 actuated by the motor 35, the contactor 26 for indicating the bolt half turned in, the contactor 36 of the position released from the eccentric 6 of the key cylinder assembly, the contactor of the dead bolt 2 extended, the contactor 38 of the half-turn bolt 3 extended, the push button switch 53 and the door closed detector 57.

The electric motor 35 is connected to the supply lines of the series circuit with two double contacts 70 and 71 for starting and stopping and reversing its direction of rotation.

The double contact 70 is controlled by a coil of relay 72 for controlling the motor 35 in the direction of closing the door, connected in series with the contactor 36 for the position released from the eccentric 6 of the key cylinder assembly. 7.

The double contact 71 is controlled by a coil of relay 73 for controlling the motor 35 in the direction of opening the door, connected in series with the push button switch 53 disposed on the housing 40.

In parallel on the switch 53 is connected a contact 74 for connection to the electrical circuit of the keyboard 55 (FIG. 2).

In series with the relay winding 72 is connected a contact 75 mechanically coupled to a contact 76 connected in series with the relay winding 73 and with another contact 77 connected in series with a relay winding 78 for timed control of the closing of the door associated with a timing circuit formed by a resistor 79 connected in series with the relay winding 78 and a capacitor 80 connected in parallel on the winding 78.

The relay winding 78 controls a contact 81 connected in series with the contactor 25 of the position released from the eccentric 20 actuated by the motor 35.

The contacts 75, 76 and 77 are controlled by a relay winding 82 connected in series with the contactor 26 for indicating the retracted latch bolt.

In series with the contact 75 and the contactor 36 for indicating the clear position of the eccentric 6 is further connected a contact 83 mechanically coupled to a contact 84 connected in series with the relay winding 78, to a contact 85 connected at series with a relay winding 86 controlling the operation of the night lock, and a contact 87 connected in series with the relay winding 72 controlling the motor 35 in the closing direction.

The contacts 83, 84, 85, 87 are controlled by a relay winding 83a connected in series with the detector 57 of the open door.

In series with the contact 84 is further connected a contact 88 mechanically coupled to a contact 89 connected in parallel on the contact 76 and to a contact 90 connected in series with the contact 87 and the coil of relay 72 for controlling the motor 35 in the direction of closure.

The contacts 88, 89 and 90 are controlled by a relay winding 91 connected in series with the contactor 38 of the U-bolt 3 out.

The night operation control winding 86 controls a contact 92 connected in series with the contactor 36 for indicating the clear position of the eccentric 6, the contacts 75 and 83 and the relay winding 72 for controlling the motor in the direction of the closing.

The relay winding 86 is connected in series with a night actuation contact 93 associated with the keyboard 55 and with a contact 54a mechanically coupled to the switch 54 for changing the operating mode from day to night operating mode.

In parallel to the push button switch 53 is connected a contact 94 controlled by the coil of relay 73 for controlling the motor 35 in the opening direction. The contact 94 is mechanically coupled to a contact 95 connected in series with the contactor 36 for indicating the position released from the eccentric 20 driven by the motor 35.

It is also mechanically coupled to the double contact 71 for reversing the direction of rotation of the motor 35.

The deadbolt 2 contactor 2 output is connected in series with a relay winding 96 for controlling a contact 97 connected in series with the contacts 87 and 90 and a contact 98 for signaling a locked lock connected in a line d supply of signaling means associated with the lock.

The circuit finally comprises a relay winding 99 connected to the terminals of the low-voltage continuous supply lines and controlling a contact 100 for signaling the system supply. A contact 101 for signaling closed door is mechanically coupled with contacts 83, 84, 85 and 87.

The signaling contacts 98, 100 and 101 are intended for example to control indicator lights not shown, which allows by simple observation of these indicators to determine the different states of the lock and to intervene quickly in case of failure of its corresponding organs.

Finally, a contact 103 for holding the relay 86, mechanically coupled to the contact 92 is connected in parallel to the night control contact 93 by the keyboard 55.

The operation of the lock will be described below with reference to Figs. 1 to 6.

By day, there are two means for operating the lock, namely the push button switch 53 carried by the lock on the inside of the door and the keyboard 55 disposed outside the room.

The actuation of the switch 53 or the composition of a code on the keyboard 55 ensures the opening of the door.

The actuation of the switch 53 causes the closing of the power supply circuit of the relay winding 73, the contacts 76 and 89 being closed and therefore the closing of the holding contact 94, the opening of the contact 95 in series with the relay coil 72 for controlling the motor 35 in the closing direction and the coming of the double contact 71 in a position such that the motor 35 is supplied in the opening direction of the lock. Since the relay winding 72 is not supplied, the double contact 70 is placed in the position corresponding to the supply of the motor 35 in the direction of opening the lock.

The actuation of the motor can only take place if the out-of-turn bolt detector 38 is open, and the winding 91 is not supplied, thus ensuring that the contact 89 connected in series with the winding is kept in the closed state. 73 and that if the contactor 26 indicating the retracted latch bolt is open.

The rotation of the motor 35 in the direction of the opening causes the rotation of the toothed wheel 22 and of the cam 24 and the rotation drive of the eccentric 20 which in turn drives the dead bolt 2 in translation in the direction of the opening.

When the cam 24 has rotated with an angular travel sufficient to cause the retraction of the bolt 3, there is closure of the contactor 26 and supply of the relay winding 82 which causes the actuation of the contacts 75, 76 and 77 .

The arrival of the latch turn at the end of the retraction stroke causes the contactor 38 to close and the relay winding 91 to power, which actuates the contacts 88, 89 and 90.

Closing the contacts 77 and 88 causes the supply to the circuit 79, 80 for delaying the supply of the relay winding 78.

The duration of this delay is such that after a predetermined time interval, and if the door has not been opened, the relay winding 78 can actuate the contact 81 to cause the supply of the motor 35 in the direction of closing.

The opening of the door P unlocked by actuation of the dead bolt 2 by means of the eccentric 20 driven by the electric motor, is ensured by a simple push and causes the closing of the reed contactor 57 and the supply of the relay winding 83a which operates contacts 83, 84, 85, 87 and 101.

The closing of contact 83 makes a first contribution to the closing of the supply circuit of the motor control relay 72 winding in the closing direction.

The opening of the contact 84 interrupts the time delay by cutting off the supply of the RC circuit 79, 80 so that the closing of the lock cannot be controlled when the door is open.

The opening of the contact 85 interrupts the supply of the relay winding 86 and the opening of the contact 92 which is in the supply circuit of the motor control relay winding 72 in the closing direction.

The opening of the contact 87 contributes to opening the winding supply line 72 in which the contacts 90 and 97 are also located.

The rotation of the motor causes the contactor 26 to open the retracted position of the bolt 3, which causes the supply of the relay winding 82. This actuates the contacts 75, 76 and 77. The contact 75 causes the engine 35 stopped by actuation of contactors 72 and 70.

The engine 35 is then stopped.

The eccentric 20 then being in the released position, the contactor 25 is closed.

When the door P is closed, either by hand or using an automatic door closer not shown in the drawings, the contactor 57 opens and the supply to the relay winding 83a is cut off, this which returns the contacts 83, 84, 85, 87 and 101 to their initial position shown in FIG. 6. The U-bolt 3 after being retracted by contact with the wall of the strike plate 59 returns to the extended position under the action of the spring 19 and causes the contactor 38 to open and consequently establishes contact 90 in series with contacts 87 and 25. The motor 35 is then activated in the sound of the iron sets and makes eccentric 20 perform two turns to ensure the engagement of deadbolt 2 fully in its keeper 59 (Fig.4).

This position of the dead bolt results in the opening of the contactor 37 and the interruption of the supply of the relay winding 96 so that the contact opens.

The opening of the outgoing dead bolt contactor 37 is accompanied by the opening of the switch 25 for indicating the release of the eccentric 20 and causes the engine 35 to stop.

The motor 35 is kept stopped until a subsequent actuation either of the push-button switch 53 or of the contact 74 controlled by the code composed on the keyboard 55.

The control of the night lock can only be carried out from the outside using the keypad 55 controlling the contactor 93 after prior actuation of the key switch 54ª to put the lock in operating mode at night, which causes the contactor 54 to be cut during daytime operation.

The composition of a code on the keyboard 55 causes the closure of the contact 93 and the supply of the relay winding 86 which cuts the supply of the motor 35 so that the lock can only be opened by actuating the Outer cylinder assembly 7 using the key 8.

However, as soon as the eccentric 6 has caused the dead bolt 2 to retract and the door has been opened, the open door detector 57 closes and supplies the relay winding 83ª which actuates the contact 85 and makes the winding pass of relay 86 in its state corresponding to night operation.

Furthermore, the bolt contactor 37 which is out closes and by means of the winding 96 closes the contact 97 which is in the supply circuit of the motor control winding 72 in the direction of closing.

The motor is ready to close the lock as soon as the leaf of door P is closed.

The system then operates in the same manner as described above.

Night and day, the actuation of the lock can be ensured from the inside using the push button switch 53.

For control from outside, the code to be used at night to operate the keyboard 55 can be chosen different from that used during the day.

For the control of the day lock, from the outside, it is only possible to use the keypad code because as long as the motur 35 is not neutralized by the night code, it ensures reclosing instantaneous of the lock after any attempt to open with the key by opening the contactor 37 which causes the motor 35 to be supplied in the closing direction.

The lock which has just been described has a number of advantages over conventional locks.

Due to its actuation by an electric motor, it has great flexibility of use.

It can be controlled remotely either by a keyboard and a push button as described above, or by a microcomputer, a microprocessor or the like.

It provides dual mechanical and electronic coding.

It provides automatic locking as soon as the door it equips is closed, which constitutes increased positive security.

The delay device ensures automatic relocking if after a given time interval, the door which it equips has not been opened.

It is finally very easy to use.

Claims (11)

1. Lock with automatic opening and closing comprising at least one dead bolt (2) and a half-turn bolt (3), a mechanism (6,7) for actuation by key (8) of the dead bolt (2) and of the U-bolt (3), characterized in that the key actuation mechanism (6,7) (8) is arranged exclusively on the outside of the lock and in that it further comprises means (20, 21, 22, 23, 27 to 34) actuated by an electric motor (35) for driving the latch bolt (3) and the dead bolt (2) on the inside of the lock according to a predetermined sequence, means ( 25, 26, 36, 37, 38, 57) for detecting the position of the dead bolt (2), and of the U-bolt (3) in the lock and with respect to the strike (59) and means (72 , 73,78,82,83a, 86,91,96,99) for actuating the electric motor (35) according to the state of said lock given by said detection means. 2. Lock according to claim 1, characterized in that said means for driving the latch bolt (3) and the dead bolt (2) comprise a reduction gear (22 to 34) driven by said electric motor and an eccentric (20 ) carried by the output shaft (21) of the reducer and disposed opposite said mechanism (6,7) for actuating the lock by key (8). 3. Lock according to claim 2, characterized in that said means for detecting the position of the U-bolt (3) and the dead bolt (2) comprise contactors (25,26) actuated by a cam (24) driven by the output shaft (21) of the reduction gear, said cam comprising a portion (24a) of smaller radius relating to the actuation of the U-bolt (3). 4. Lock according to one of claims 2 and 3, characterized in that said means for detecting the position of the latch bolt and the dead bolt further comprises a contactor (38) with the latch bolt extended, a contactor (37) of dead bolt (2) out and a contactor (57) disposed opposite the hole of the strike (59), said contactors (38, 37, 57) being respectively connected in means supply circuits (91 , 88, 89, 90, 96, 97, 98, 83a, 83, 84, 85, 87, 101) for controlling the electric motor (35) driving the lock according to the state of the given lock by said position detection means. 5. Lock according to one of claims 3 and 4, characterized in that the mechanism (6,7) for actuating the lock by key (8) and the mechanism for driving the lock by means of said electric motor ( 35) each comprise a drive member (6,20), said drive members being driven one (6) by a cylinder assembly (7) with key (8) and the other by the shaft of outlet (21) of the reduction gear (22, 27 to 34) associated with said electric motor (35) and being arranged opposite one another so as to cooperate with the extension (4) of the dead bolt (2) and in that said contactors (25, 26) actuated by said cam constitute means for detecting the position of said drive members authorizing the operation of the lock. 6. Lock according to any one of claims 1 to 5, characterized in that it further comprises means (78,79,80,81) for timed control of the electric motor (35) in the closing direction of the lock intended to cause the lock to close if after a time interval predetermined the bolts (2,3) of the lock are always located opposite said strike (59). 7. Lock according to one of the preceding claims, characterized in that it comprises means (53,55,74) for day control, means (53, 55,93.8) for night control and means (54,54a)) to switch the lock from a day control mode to a night control mode. 8. Lock according to claim 7, characterized in that said day control means comprise a push button switch (53) placed on the inside of the lock, and a remote control device with code (55) placed from the external side of the lock and associated with a switch for controlling the supply of the motor (35) in the opening direction in response to the action of the remote control device. 9. Lock according to claim 8, characterized in that said night control means include said push button switch (53) and said remote code control device (55) and in that said means for passing the lock from day control mode to night control mode include a key switch (54,54a) placed on the inside of the lock and intended to deactivate the control from outside the electric motor (35) under the action of the remote control device, and to make it possible to open the lock from the outside by the actuation mechanism (6,7) with key (8) only. 10. Lock according to any one of claims 2 to 9, characterized in that it further comprises a member (23) disposed on the inner side of the lock, for manual actuation of said means (20, 21, 22, 23, 27 to 34) for driving the dead bolt (2) and the U-bolt (3) in the event of an electrical power supply failure, said member (23) constituting with the key actuation mechanism (6,7) placed on the outside of the lock of the mechanical actuation back-up means. 11. Lock according to any one of claims 1 to 10, characterized in that it further comprises means (96, 98, 99, 100, 83a, 101) for signaling the different states of the lock, intended to allow rapid intervention in the event of a breakdown.

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