SELF-LOCKING MECHANICAL-MOTORISED THREE-POINT LOCK

Abstract

 The invention relates to a three-point lock with deadbolts and self-locking on the deadbolts with a central assembly (1), an upper assembly (1.1) and a lower assembly (1.2), wherein each assembly comprises a deadbolt (4, 4.1, 4.2) and wherein the central assembly (1) comprises a mechanical central transmission (16) and the upper and lower assemblies (1.1, 1.2) comprise satellite transmissions (7.1, 7.2) linked to the mechanical central transmission (16) via an upper espagnolette bolt (3.1) and a lower espagnolette bolt (3.2), so that when the mechanical central transmission (16) is moved in the closing direction, it moves the upper and lower satellite transmissions (7.1, 7.2) in the same direction, all the deadbolts (4, 4.1, 4.2) moving to the closed position. At least the central assembly (1) comprises a self-locking system.

Description

OBJECT OF THE INVENTION

[0001] The object of the present invention falls within the sector of locksmithing and more specifically mechanical-motorised locks. The invention relates to a three-point lock with deadbolts and self-locking on the deadbolts.

TECHNICAL PROBLEM TO BE RESOLVED AND BACKGROUND OF THE INVENTION

[0002] A countless number of motorised lock models are known in the state of the art, said models comprising a load shaft and closing hooks, where the opening process is motorised or carried out manually by a key, and the closing process is carried out by loading the load shaft. At the moment when said load shaft is loaded, the closing hooks are triggered and, therefore, a greater closing force is applied to the elements that position the door (or window).

DESCRIPTION OF THE INVENTION

[0003] The invention relates to a self-locking mechanical-motorised three-point lock.

[0004] The lock of the present invention does not have any load shafts for performing the closing operation. The configuration of the lock allows for smooth and frictionless closing by means of an electrical command sent to the motor of the lock. Once closing has been performed, the deadbolts (hooks) that perform this action are self-locked, i.e., it is impossible to fold them manually or with external tools. They would only open mechanically, by key, or electrically.

[0005] For this purpose, the lock comprises a central assembly and upper and lower assemblies wherein each of the assemblies has a deadbolt (hook or closing point). These deadbolts are linked to a mechanical central transmission and to upper and lower satellite transmissions. The mechanical central transmission and the satellite transmissions are linked to each other via an upper espagnolette bolt and a lower espagnolette bolt, which allow the transmission of movements to synchronise the opening/closing movements of the three locking points (deadbolt, upper deadbolt and lower deadbolt).

[0006] In an embodiment of the invention, the lock incorporates a coil which, if energised, inhibits manual opening by the key-cylinder. This increases security against attacks on the cylinder by bumping, impressioning, breaking, etc. In these cases, the cylinder of the lock can be rotated, but the lock does not respond as long as the inhibition is active. The lock has also been fitted with guards for the espagnolette bolts to prevent their tampering and thus also prevent the lock from being opened by an attack on the espagnolette bolts. The lock can also have two central steel guards, which prevent tampering of the internal elements by attempts to drill holes in the lock body.

[0007] In the embodiments in which the lock comprises an inhibiting system, said system has a coil that attracts an inhibiting lever, which in turn is connected to a mechanical central transmission for manual opening by key. Once the coil is activated, it attracts the inhibiting lever that connects the mechanical central transmission and a cylinder slider, thus being in idle rotation and thus preventing opening by key.

[0008] The inhibiting system comprises a sliding lever, connected to the mechanical central transmission by an inhibiting lever, and it comprises an inhibiting coil that causes the inhibiting lever to release from the cylinder slider.

[0009] Self-locking is achieved by positioning, in each assembly, a self-locking shaft, which is connected to the mechanical central transmission and to the corresponding satellite transmissions, within a slotted hole comprised in the locking deadbolts and said slotted hole has a section arranged at an obtuse angle with respect to the longitudinal direction of movement with respect to the longitudinal movement of the transmissions (mechanical central transmission and upper and lower satellite transmissions) which prevents the corresponding deadbolt from rotating. This angle is preferably 108°.

[0010] The lock also comprises a motor, connected to a bit, which drives a die with two bearings configured to slide along a flute of the bit. The motor is also connected to the mechanical central transmission.

[0011] To complete the self-locking system, the lock also comprises a positioning rod which, via a spring, positions the deadbolt of the mechanical central transmission in the open or closed lock position.

[0012] When the lock is activated both electrically and mechanically, the die connected to the central transmission is moved through the flutes of the bit and it moves the central transmission, which in turn moves the upper and lower espagnolette bolts, thus causing the deadbolts to rotate, opening or closing the lock. This position is locked by the self-locking system with the locking shaft arranged in the corresponding position in the locking slotted hole (with a section inclined 108°) and with the positioning rod.

[0013] As for opening by key, the lock comprises a cylinder sliding with the ability to move in two directions, thus allowing the lock to be opened or closed.

[0014] In cases where the lock comprises an inhibiting system, the inhibiting coil is electrically activated, so that it attracts the inhibiting lever disengaging it from the cylinder slider, which in turn is connected to the central transmission and makes it impossible for the lock to open mechanically by key. The lock can be opened electrically under these conditions. Thus, opening by key can be inhibited if the inhibiting coil is energised, so that said coil attracts the inhibiting lever which is connected to the cylinder slider, leaving it free and non-actuated, so that the lock cannot be opened by key.

[0015] For electrical opening, the lock comprises an electronic circuit configured to receive electrical signals which activate the motor, which in turn is configured to move the deadbolts.

[0016] The electronic circuit is always powered with 12V DC voltage. The lock does not work until it faces the central striker which, in a preferred embodiment, comprises a magnet. The magnet excites a reed in the electronic circuit, at which point the lock is actuated and the deadbolts rotate to the closed lock position.

[0017] A signal is given to electrically open the lock. The lock comprises two 12V DC power supply wires and a third wire which, when set to negative, sends the electrical opening signal. If this third wire is left in a negative state continuously (as if it were a switch) after giving the opening signal, the lock remains open continuously as long as this state is maintained. When the negative signal is eliminated, the lock, when facing the striker and detecting the magnet, locks the door again. This is the swing or free passage function.

[0018] The electronic circuit can also receive a constant voltage so that the lock is permanently activated in order to leave the door in a swing state, with free access by simply pushing it.

[0019] In an exemplary embodiment, it can also comprise a magnet, positioned in the corresponding striker (element in which the deadbolts are housed when they are in the closed position). In such cases, the lock can comprise a circuit that detects, by means of the magnet, that the window/door is in a position ready for closing, and it can electrically activate said closing.

[0020] The most important advantages of the lock of the invention in view of the prior art are the following:

• the lock without the need for load shafts minimises the effort required to close the door, both manually by the user and automatically by the door closing springs that are incorporated for automatic closing of the doors;
• when the lock is electrically locked and the window/door is positioned in its place, an electrical signal activates the lock and the deadbolts lock the door;
• the lock can incorporate a standard European profile half or double cylinder for opening on both sides;
• the self-locking deadbolts prevent accidental opening or opening by external tampering.

[0021] In order to increase the durability of the product and offer greater quality, the lock is preferably made entirely of stainless steel (except for the rivets).

[0022] With a single electrical pulse of 12V DC, the three deadbolts are automatically released and held in the open position by the positioning rod of the central transmission. With another electrical pulse, the three deadbolts are held in the closed position, also by the positioning rod of the central transmission, and are self-locked by the self-locking shaft which rotates through the 108º slotted hole.

[0023] In possible embodiments of the invention, the lock can be opened remotely, it can be used on swing doors/windows and it can comprise open/closed status signalling.

BRIEF DESCRIPTION OF THE FIGURES

[0024] To complete the description, and for the purpose of helping to make the features of the invention more readily understandable, this description is accompanied by a set of drawings constituting an integral part of the same, which by way of illustration and not limitation represents the following:

Figure 1 shows a plan view of the lock of the invention with the deadbolts in the closed position, i.e., with the lock in the activated state (with the door closed and unable to be opened).

Figure 2 shows a detail of the central assembly in figure 1.

Figure 3A shows a detail of the upper assembly in figure 1.

Figure 3B shows a detail of the lower assembly in figure 1.

Figure 4A shows a sectional view of the central deadbolt in figure 2, where the inhibiting coil can be seen activated, which prevents the lock from being opened mechanically by key.

Figure 4B shows the section marked as plane BB in figure 4A, to show the die, the bit and the two bearing balls in cross-section.

Figure 4C shows a perspective view of the bit and die area, and the microswitch and mechanical central transmission are marked for reference.

Figure 5A shows a view of the lock with the deadbolts in the closed position and the metal guard of the upper and lower espagnolette bolts is shown.

Figure 5B shows a detail of the central assembly in figure 5A, where the central steel guard that protects the central assembly of the lock from external attacks and the metal box that protects the electronic circuit are shown.

Figures 6A-B show the two states of the lock, respectively, open with the deadbolts retracted and closed with the deadbolts in the closed position.

[0025] The following is a list of the elements shown in the figures:
1: assembly; 1.1: upper assembly; 1.2: lower assembly; 2: front; 3.1: upper espagnolette bolt; 3.2: lower espagnolette bolt; 4: deadbolt; 4.1: upper deadbolt; 4.2: lower deadbolt; 5: deadbolt rotation shaft; 5.1: upper deadbolt rotation shaft; 5.2: lower deadbolt rotation shaft; 6: rod rotation shaft; 6.1: upper rod rotation shaft; 6.2: lower rod rotation shaft; 7.1: upper satellite transmission; 7.2: lower satellite transmission; 8: first drive shaft; 8.1: first upper drive shaft; 8.2: first lower drive shaft; 9: positioning rod; 9.1: upper positioning rod; 9.2: lower positioning rod; 10: spring; 10.1: upper spring; 10.2: lower spring; 11: cylinder cam; 12: cylinder slider; 13: transmission slotted hole; 13.1: upper transmission slotted hole; 13.2: lower transmission slotted hole; 14: cylinder; 15: self-locking shaft; 15.1: upper self-locking shaft; 15.2: lower self-locking shaft; 16: mechanical central transmission; 17: second drive shaft; 17.1: second upper drive shaft; 17.2: second lower drive shaft; 18: self-locking slotted hole; 18.1: upper self-locking slotted hole; 18.2: lower self-locking slotted hole; 19: base; 19.1: upper base; 19.2: lower base; 20: motor; 21: positioning slotted hole; 21.1: upper positioning slotted hole; 21.2: lower positioning slotted hole; 22: central guard; 23.1: upper espagnolette bolt cover; 23.2: lower espagnolette bolt cover; 25: metal electronic box; 26: die; 27: microswitch; 28: bit; 29: inhibiting coil; 30: inhibiting lever; 31: ball; 32: striker; 33: magnet; 34: circuit; 35: overhead connector; 36: inhibiting lever rotation shaft; 37: inhibiting lever spring; 38: inhibiting lever spring stop

DETAILED DESCRIPTION

[0026] The present invention should not be limited to the embodiment described herein. Other configurations may be carried out by those skilled in the art based on the present description. Accordingly, the scope of the invention is defined by the following claims.

[0027] Figure 1 shows a plan view of the self-locking mechanical-motorised three-point lock installed on a front (2). In this case, the lock is shown in the closed position, with the deadbolts (4, 4.1, 4.2) (locking points) in the closed position, housed in receiver holes in a striker (32). The lock can comprise a housing base (19), which is a body inside of which the mechanical and electrical elements corresponding to a central assembly (1) (central locking point) are housed. Furthermore, the lock comprises an upper assembly (1.1) and a lower assembly (1.2) which, in an exemplary embodiment, are housed in secondary closing housing bases (19.1, 19.2). The lock described is a high security lock.

[0028] The central, upper and lower assemblies (1, 1.1, 1.2) are linked to each other by upper (3.1) and lower (3.2) espagnolette bolts. The central assembly (1) comprises a mechanical central transmission (16) and an electrical central transmission, and the upper and lower assemblies (1.1, 1.2) comprise upper and lower satellite transmissions (7.1, 7.2) connected via the corresponding upper and lower espagnolette bolts (3.1, 3.2) to the mechanical central transmission (16). In a preferred embodiment, both the mechanical central transmission (16) and the satellite transmissions (7.1, 7.2) are preferably plates which can comprise a plurality of projections, inlets, holes and/or a combination thereof.

[0029] Thus, when the mechanical central transition (16) is moved upwards (in the closing direction of the lock), it moves the upper and lower espagnolette bolts (3.1, 3.2) with it, said bolts in turn moving the upper and lower satellite transmissions (7.1, 7.2), forcing the upper and lower deadbolts (4.1, 4.2) to rotate in the closing direction. When the mechanical central transition (16) is moved downwards in the opening direction, it moves the upper and lower espagnolette bolts (3.1, 3.2) with it, said bolts in turn moving the upper and lower satellite transmissions (7.1, 7.2) with them, forcing the upper and lower deadbolts (4.1, 4.2) to rotate in the opening direction.

[0030] Preferably, both the central deadbolt (4) and the upper and lower deadbolts (4.1, 4.2) are "parrot beak" deadbolts. In an exemplary embodiment, they consist of a plurality of steel sheets joined together.

[0031] Figure 2 shows a detail of the central assembly (1). As can be seen in said figure, the central deadbolt (4) is connected to a mechanical central transmission (16) plate, in a manner that swivels around a deadbolt rotation shaft (5). The central deadbolt (4) further comprises a self-locking slotted hole (18) inside of which a self-locking shaft (15) is moved, which is connected to the mechanical central transmission (16) plate. The self-locking slotted hole (18) has a configuration with a first section arranged at a certain inclination with respect to the longitudinal direction of displacement of the mechanical central transmission (16) plate and with a second section arranged in said longitudinal direction of displacement of the mechanical central transmission (16) plate.

[0032] In this way, when the central deadbolt (4) swivels around the deadbolt rotation shaft (5) to the closed position, the self-locking shaft (15) is moved through the self-locking slotted hole (18) until it is housed in the first section of said self-locking slotted hole (18), wherein it is locked by the very position of the central deadbolt (4) and the configuration of the sections of the self-locking slotted hole (18). This ensures that the central deadbolt (4) is engaged when it is in the closed lock position.

[0033] In a preferred exemplary embodiment, the first section of the self-locking slotted hole (18) is inclined at an obtuse angle with respect to the longitudinal direction of movement of the central transmission (16) plate. This inclination is preferably 108°.

[0034] The three deadbolts (4, 4.1, 4.2) of the lock comprise self-locking slotted holes (18). Furthermore, the upper and lower satellite transmissions (7.1, 7.2), as well as the mechanical central transmission (16), have locking shafts (15) which act as the locking shaft (15) of the mechanical central transmission (16) described above. Thus, the three locking points are self-locking.

[0035] The movement of the mechanical central transmission (16) plate is guided by the displacement of a first drive shaft (8) which is moved guided in a transmission slotted hole (13) and by the movement of a second drive shaft linked to a positioning rod (9) which also form part of the mechanical central transmission (16).

[0036] Similarly, the upper and lower satellite transmissions (7.1, 7.2) comprise corresponding first upper and lower drive shafts (8.1, 8.2) which are moved guided in transmission slotted holes (13.1, 13.2) and by the movement of second drive shafts linked to upper and lower positioning rods (9.1, 9.2) which are part of the upper and lower satellite transmissions (7.1, 7.2), respectively.

[0037] As can be seen in aforementioned figure 2, the positioning rod (9) is crossed upwards so when attempting to lift the deadbolt (4) with any type of tool (e.g., a screwdriver or a lever), the positioning rod (9) prevents said displacement from being carried out.

[0038] Figures 3A-B show detail views of the upper assembly (4.1) and the lower assembly (4.2), respectively.

[0039] When the opening movement of the lock is carried out, the deadbolts (4, 4.1, 4.2) swivel about the corresponding rotation shafts (5, 5.1) until they leave the corresponding recesses of the striker (32), thus moving the deadbolts from the closed position to the open position (positions that correspond to the closed position and the open position of the lock). In turn, with this movement, the self-locking slotted hole (18) rotates, so that the self-locking shaft (15) goes from being housed in the second section to being housed in the first section of said self-locking slotted hole (18), the deadbolt (4) being locked in said position.

[0040] When the mechanical central transmission (16) or the satellite transmissions (7) are moved in the closing or opening direction (considering the nomenclature used as upper/lower it would be in the upward and downward direction, respectively), a second drive shaft (17), which is connected to the mechanical central transmission (16) plate (there is also a second upper drive shaft and a lower drive shaft (17.1, 17.2) in the corresponding upper and lower satellite transmission (7.1, 7.2) plates), this movement moves the positioning rod (9) to one side or the other, rotating about a rod rotation shaft (6) (in the upper and lower assemblies (1.1, 1.2) they have been referred to as upper and lower positioning rod (9.1, 9.2) and upper and lower rod rotation shaft (6.1, 6.2), respectively). A spring (10) arranged over the positioning rod (9) assists in the correct positioning and prevents the corresponding deadbolt (4) from being moved out of its position (both in the open position and in the closed position) (the same applies to the upper and lower assemblies (1.1, 1.2) with an upper spring (10.1) and a lower spring (10.2) and the corresponding upper and lower positioning rods (9.1, 9.2)).

[0041] The positioning rod (9) leaves the satellite transmission (7) and the central transmission (16) positioned through the spring (10) when the "parrot beak" deadbolt (4) is inserted into the upper and lower secondary housing base (39). Moreover, when the "parrot beak" deadbolt (4) is in the closed position, the satellite transmission (7) is moved in the other direction and the deadbolt (4) is left secured via the self-locking shaft (15) and the positioning rod (9) so that the deadbolt (4) cannot be moved in the opening direction by means of external tools. This effect can also be applied to the mechanical central transmission (16).

[0042] Thus, the positioning rod (9) pivots on the rod rotation shaft (6), which in turn is connected to the mechanical central transmission (16) (in an exemplary embodiment, it is securely connected, by means of a rivet, to the housing base (19)). A second drive shaft (17) is also connected to the mechanical central transmission (16) and linked to the positioning rod (9) that comprises a positioning slotted hole (21) such that, when the mechanical central transmission (16) is moved, it causes the second drive shaft (17) to move and said second drive shaft causes the positioning rod (9) to move. Furthermore, a spring (10) is arranged around the positioning rod (9) and exerts pressure on the second drive shaft (17) such that, both when the lock is open and when the lock is closed, the spring (10) secures the position of the positioning rod (9), assisting in the self-locking of the deadbolt (4).

[0043] Therefore, the self-locking assembly works in combination with the positioning rod (9). If the lock would not have the positioning rod (9), the deadbolt (4) could be lifted using external tools such as a screwdriver or lever.

[0044] The lock can comprise a cylinder (14), that can be actuated with a key, and having a high cylinder cam (11) as shown, for example, in figure 2. Likewise, said cylinder (14) acts through the cam (11) by moving the cylinder slider (12) so that the mechanical central transmission (16), when being moved in one direction or the other, causes the self-locking shafts (15) to move in the corresponding self-locking slotted holes (18). As previously described, this movement is transmitted to the upper assembly (1.1) and to the lower assembly (1.2) through the upper and lower espagnolette bolts (3.1, 3.2), causing the deadbolts (4, 4.1, 4.2) to swivel. The cylinder slider (12) comprises a window on which the cylinder cam (11) acts, moving said slider.

[0045] The cylinder (14) can be actuated by means of an electric current, whereby an electric current is sent to an electronic circuit (34) connected to a motor (20), wherein said elements form part of a central electronic transmission of the central assembly (1), as shown in figure 4A. The electric current is transmitted from the electronic circuit (34) to the motor (20) by means of a bit (28), shown in figure 4A, which moves a die (26) that comprises therein balls (31) which can be made of steel and which are moved along the flute of the bit (28), thus moving the mechanical central transmission (16) plate.

[0046] Figure 4B shows a detailed view of a section of the die (26) showing the bit (28) and the balls (31). This section is determined by the plane BB marked in figure 4A. The balls (31) are bearing balls which, when sliding along the bit (28) in one direction or the other (depending on whether the lock is opened with a key or electrically), cause the die (26) to move the plate of the mechanical central transmission (16) and said mechanical central transmission, in turn, moves the upper and lower espagnolette bolts (3.1, 3.2), which causes the plate of the upper and lower satellite transmissions (7.1, 7.2) to move so that the lock is closed or opened either electrically or mechanically. Figure 4C shows a perspective view of the die (26) and the bit (28), showing how they are linked, and how the bit (28) passes through the die (26).

[0047] As can also be seen in figure 4A, the lock can comprise an inhibiting assembly. Said assembly includes an inhibiting coil (29) which, when it receives a certain voltage, attracts an inhibiting lever (30), releasing the cylinder slider (12) and thus allowing it to move. In this situation, when the cam (11) of the cylinder (14) acts on the cylinder slider (12), said slider is moved freely without moving the mechanical central transmission (16) and therefore the deadbolts (4, 4.1, 4.2) do not move.

[0048] In a preferred embodiment, the voltage determined in order for the inhibiting assembly to work is 12V DC. This voltage can come from any power supply and with any control system, such as, for example, push buttons, proximity readers, etc.

[0049] In cases where the lock comprises an inhibiting assembly, said assembly has an inhibiting lever (30) which is able to rotate about an inhibiting lever rotation shaft (36) which is connected to the mechanical central transmission (16). It also has an inhibiting lever spring (37) that keeps the inhibiting lever (30) connected to the cylinder slider (12). When the lock is opened with a key by inserting the key into the cylinder (14), the cylinder cam (11) acts on the cylinder slider (12) which, via the inhibiting lever (30), moves the mechanical central transmission (16) which, with its displacement, causes the upper and lower espagnolette bolts (3.1, 3.2) to move and the deadbolts (4, 4.1, 4.2) to rotate.

[0050] The inhibiting system is optional, i.e., inhibition is not necessary for lock operation. It is included in the embodiments of the lock where the user wishes to inhibit opening with the key, (the key is allowed to rotate but the deadbolts are not).

[0051] In cases where the lock does not have an inhibiting system, the lock can comprise an inhibiting lever (30), but in this case it is always arranged inside the cylinder slider (12) so that the lock always opens mechanically with a key, and of course it always opens electrically. In cases where the lock does not comprise an inhibiting system, the lock does not need to have the inhibiting coil (29).

[0052] On the other hand, if the elements corresponding to motorised opening are eliminated in any embodiment, the lock would work like any other lock, mechanically with just a key. In this case, it is always necessary to use a key to open or close the lock in order to open it mechanically.

[0053] In cases where the lock does comprise an inhibiting system, when voltage is applied to the inhibiting coil (29), said coil attracts the inhibiting lever (30) and disengages it from the cylinder slider (12) whereby, when mechanically rotated with a key (inserting the key into the cylinder (14)), the cam (11) moves the cylinder slider (12) to either side, freely, and without rotating the deadbolts (4, 4.1, 4.2), i.e., without closing or opening the lock. In cases where no voltage has been applied to the coil, when a cylinder cam (11) is rotated (by rotating a key in said cylinder (14)), it moves the cylinder slider (12) which is connected to an inhibiting lever (30) and which causes the mechanical central transmission (16) to move. The inhibiting lever (30) is connected to the mechanical central transmission (16) via an inhibiting lever rotation shaft (36) about which said inhibiting lever (30) pivots.

[0054] The inhibiting lever is a floating joint which is connected via the inhibiting lever rotation shaft (36) to the mechanical central transmission (16). The inhibiting lever spring (37) connects said inhibiting lever (30) to the cylinder slider (12). When the lock is opened mechanically, if the inhibiting coil (29) has a voltage applied to it (e.g., 12V DC), it attracts the inhibiting lever (30), releasing the cylinder slider (12) so that said slider cannot displace the mechanical central transmission (16) and rotates freely with the key in one direction or the other without causing any other element of the lock to move. When the inhibiting coil (29) stops receiving voltage, the inhibiting lever spring (37) causes the inhibiting lever (30) to come in contact with the cylinder slider (12) again so that, when the lock is actuated with a key in the cylinder (14), it causes the deadbolts (4, 4.1, 4.2) to rotate, causing the lock to open or close.

[0055] Thus, the inhibiting lever (30) is connected to the cylinder slider (12) via a spring (37) of the inhibiting assembly which is tensioned over an inhibiting assembly spring stop (38) to allow, if the inhibiting coil is not energised with the necessary voltage, the displacements of the mechanical central transmission (16), and therefore of all the assemblies (1, 1.1, 1.2), of the lock to open or close it mechanically, when the cam (11) of the cylinder (14) acts on the cylinder slider (12). Likewise, the central assembly (4) comprises a microswitch (27) (shown, for example, in figure 4C), which is fixed and attached to the circuit (34), which is actuated by the die (26) when it is moved by the action of the bit (28) and the balls (31).

[0056] Thus, when the die (26) is moved, it comes in contact with the microswitch (27), which sends a signal indicating the position of the open/closed lock. The microswitch (27) is preferably a switched microswitch (C-NO-NC) which is part of the circuit (34). When the die (26) is moved upwards or downwards along the bit (28), it comes in contact with the pin of the microswitch (27), either by pushing it in or leaving it free, whereby the microswitch (27) gives the two possible positions of the deadbolts (4, 4.1, 4.2) (open or closed lock position). In total, the electronic circuit (34) includes two 12V DC power supply wires, an opening and/or swing signal wire, and three wires connected to the microswitch (27).

[0057] The lock can also comprise a magnet (33) installed on the striker (32). To activate the lock by means of voltage (12V DC), when the striker (32) is facing the electronic circuit (34), the magnet (33) detects said position (closed door or window) so that, when an external voltage is applied through a connector (35) of the electronic circuit (34) wherein said electronic circuit (34) is connected to the motor (20), the motor (20) rotates the bit (28), moving the die (26). In turn, the die (26), sliding through the balls (31) along the flute of the bit (28), moves the mechanical central transmission (16), causing opening or closing by swivelling the central deadbolt (4) in one direction or the other. The open or closed position of the central deadbolt (4) is recognised by the microswitch (27) which is actuated by the die (26) when it is moved along the bit (28).

[0058] The lock also allows the door to work in swing state. To do this, the deadbolts (4, 4.1, 4.2) are permanently housed inside the housing base (19) and the secondary housing bases (39) in order to open the door/window by simply pushing it. To do this, instead of sending an electrical signal through the connector (35) to the circuit (34) to activate the motor (20), the deadbolts (4, 4.1, 4.2) are kept in the open position, i.e., housed in the housing base (19) and secondary housing bases (39).

[0059] In a possible embodiment, as shown in figures 5 A-B, the lock comprises an upper espagnolette bolt cover (23) arranged over the upper espagnolette bolt (3.1), a lower espagnolette bolt cover (24) arranged over the lower espagnolette bolt (3.2), a metal electronic box (25) arranged over the electronic circuit (34) and/or a central steel guard (22) arranged over the mechanical central transmission (16).

[0060] In the embodiment where the lock has a central steel guard (22), said guard protects the lock from external attacks such as drilling or similar. The self-locking assembly of the central deadbolt (4) (and of the upper (4.1) and lower (4.2) deadbolts) prevents unwanted activation of the lock, thus preventing unauthorised opening of the door. The locking system incorporates the positioning rod (9) as shown, for example, in figure 2. When the deadbolt (4) is in the closed position, the positioning rod (9) does not allow it to return through the self-locking slotted hole (18).

[0061] However, the self-locking system does not prevent the door from opening when the lock is activated by any of the previously described methods, i.e., by a key actuating the cylinder (14), or electrically through the electronic circuit (34), since in these cases the door is opened by moving the mechanical central transmission (16) using the methods described above.

[0062] Figures 6A-B show the lock, in the open and closed position. Figure 6A shows the deadbolts (4, 4.1, 4.2) in the open position, and figure 6B shows them in the closed position (housed in holes in the striker (32)).

[0063] Lastly, it must be taken into account that the present invention must not be limited by the embodiment described herein. Other configurations may be carried out by those skilled in the art based on the present description. Accordingly, the scope of the invention is defined by the following claims.

Claims

1. A self-locking mechanical-motorised three-point lock, characterised in that it comprises:

- a central assembly (1) that in turn comprises:

- a mechanical central transmission (16) to which a central deadbolt (4) is connected with the ability to swivel, said central deadbolt swivelling about a first deadbolt rotation shaft (5) between an open lock position and a closed lock position and wherein the central deadbolt (4) comprises a self-locking slotted hole (18), and said mechanical central transmission (16) comprises two transmission slotted holes (13) oriented in a longitudinal direction and it comprises a second drive shaft (17);

- a base (19), linked to the mechanical central transmission (16), from which a first drive shaft (8) that is housed in one of the transmission slotted holes (13), a second rod rotation shaft (6) that is housed in the other transmission slotted hole (13), and a self-locking shaft (15) that is housed in the self-locking slotted hole (18) project;

wherein the self-locking slotted hole (18) has a first section arranged in the longitudinal direction of the mechanical central transmission (16) and a second section inclined at an obtuse angle with respect to the direction of the first section;

- a positioning rod (9) comprising a positioning slotted hole (21) in which the second drive shaft (17) is housed and said positioning rod being connected to the base (19) by means of the second rod rotation shaft (6) around which it pivots;

- a spring (10) arranged around the rod (9);

- a cylinder assembly comprising a cylinder (14), a cylinder cam (11) and a cylinder slider (12);

- an electrical central transmission (21) comprising an electrical circuit (34) with a connector (35) configured to connect to an external power supply and wherein the electrical circuit (34) is connected to a motor (20) linked to a bit (28), such that when the motor (20) is driven, it causes a die (26) to move along flutes of the bit (28), said die moved by two bearing balls (31) that are housed inside the die (26), and wherein the die (26) is connected to the mechanical central transmission (16) such that when said mechanical central transmission (16) is moved, it moves said die (26); and when the mechanical central transmission (16) is moved between an open lock position and a closed lock position, it causes the central deadbolt (4) to rotate, such that the self-locking shaft (15) is moved through the self-locking slotted hole (18) and into the second section, where the position of the central deadbolt (4) is thus locked, and the rod (9) has rotational movement about the rod rotation shaft (6) and is displaced by the second drive shaft (17) and is positioned in one direction or the other by the spring (10) which is configured to lock the movement of the rod (9);

- an upper assembly (1.1) comprising an upper satellite transmission (7.1) and at least one upper deadbolt (4.1) connected to it with the ability to swivel;

- a lower assembly (1.2) comprising a lower satellite transmission (7.2) and at least one lower deadbolt (4.2) connected to it with the ability to swivel;

the lock also comprises an upper espagnolette bolt (3.1) and a lower espagnolette bolt (3.2) which are connected to the mechanical central transmission (16) and, respectively, to the upper and lower satellite transmissions (7.1, 7.2) such that said upper and lower espagnolette bolts (3.1, 3.2) move the upper and lower satellite transmissions (7.1, 7.2) causing the corresponding upper and lower deadbolts (4.1, 4.2) to rotate in order to close/open the lock.

2. The self-locking mechanical-motorised three-point lock according to claim 1, wherein the upper assembly (1.1) further comprises:

- an upper deadbolt rotation shaft (5.1) around which the upper deadbolt (4.1) swivels;

- an upper self-locking slotted hole (18.1) and two upper transmission slotted holes (13.1) oriented in a longitudinal direction;

- a second upper drive shaft (17.1);

- an upper base (19.1) linked to the upper satellite transmission (7.1) from which a first upper drive shaft (8.1) that is housed in one of the upper transmission slotted holes (13.1), a second upper rod rotation shaft (6.1) that is housed in the other upper transmission slotted hole (13.1) and an upper self-locking shaft (15.1) that is housed in the upper self-locking slotted hole (18.1) project;

wherein the upper self-locking slotted hole (18.1) has a first section arranged in the longitudinal direction of the mechanical central transmission (16) and a second section at an obtuse angle with respect to the direction of the first section;

- an upper positioning rod (9.1) comprising an upper positioning slotted hole (21.1) in which the second upper drive shaft (17.1) is housed and said upper positioning rod being connected to the upper base (19.1) by means of the second upper rod rotation shaft (6.1) around which it pivots;

- an upper spring (10.1) arranged around the upper rod (9.1);

and when the upper satellite transmission (7.1) is moved by the upper espagnolette bolt (2.1), it causes the upper deadbolt (4.1) to rotate, such that the upper self-locking shaft (15.1) is moved through the upper self-locking slotted hole (18.1) and into the second section, where the position of the upper deadbolt (4.1) is thus locked and the upper rod (9.1) has rotational movement about the upper rod rotation shaft (6.1) and is displaced by the second upper drive shaft (17.1) and is positioned in one direction or the other by the upper spring (10.1) which is configured to lock the movement of the upper rod (9.1).

3. The self-locking mechanical-motorised three-point lock according to any one of the preceding claims, wherein the lower assembly (1.2) further comprises:

- a lower deadbolt rotation shaft (5.2) around which the lower deadbolt (4.2) swivels;

- a lower self-locking slotted hole (18.2) and two lower transmission slotted holes (13.2) oriented in a longitudinal direction;

- a second lower drive shaft (17.2);

- a lower base (19.2) linked to the lower satellite transmission (7.2) from which a first lower drive shaft (8.2) that is housed in one of the lower transmission slotted holes (13.2), a second lower rod rotation shaft (6.2) that is housed in the other lower transmission slotted hole (13.2) and a lower self-locking shaft (15.2) that is housed in the lower self-locking slotted hole (18.2) project;

wherein the lower self-locking slotted hole (18.2) has a first section arranged in the longitudinal direction of the mechanical central transmission (16) and a second section at an obtuse angle with respect to the direction of the first section;

- a lower positioning rod (9.2) comprising a lower positioning slotted hole (21.2) in which the second lower drive shaft (17.2) is housed and said lower positioning rod being connected to the lower base (19.2) by means of the second lower rod rotation shaft (6.2) around which it pivots;

- a lower spring (10.2) arranged around the lower rod (9.2);

and when the lower satellite transmission (7.2) is moved by the lower espagnolette bolt (2.2), it causes the lower deadbolt (4.2) to rotate, such that the lower self-locking shaft (15.2) is moved through the lower self-locking slotted hole (18.2) and into the second section, where the position of the lower deadbolt (4.2) is thus locked and the lower rod (9.2) has rotational movement about the lower rod rotation shaft (6.2) and is displaced by the second lower drive shaft (17.2) and is positioned in one direction or the other by the lower spring (10.2) which is configured to lock the movement of the lower rod (9.2).

4. The self-locking mechanical-motorised three-point lock according to claim 1, wherein the obtuse angle of the locking slotted hole (18) is a 108° angle with respect to the longitudinal direction of displacement of the mechanical central transmission (16).

5. The self-locking mechanical-motorised three-point lock according to claim 2, wherein the obtuse angle of the upper locking slotted hole (18.1) is a 108° angle with respect to the longitudinal direction of displacement of the upper satellite transmission (7.1).

6. The self-locking mechanical-motorised three-point lock according to claim 2, wherein the obtuse angle of the lower locking slotted hole (18.2) is a 108° angle with respect to the longitudinal direction of displacement of the lower satellite transmission (7.2).

7. The self-locking mechanical-motorised three-point lock according to claim 1, further comprising an inhibiting assembly with an inhibiting coil (29), an inhibiting lever (30), an inhibiting assembly rotation shaft (16) and an inhibiting lever spring (37); wherein the cylinder slider (12) is connected to the inhibiting lever (30) such that the rotation of the cylinder (14) causes the displacement of the mechanical central transmission (16) via the cylinder cam (11) and the inhibiting coil (29) is connected to the electronic circuit (34) such that when the inhibiting coil (29) receives a certain voltage, it attracts the inhibiting lever (30) that is connected to the mechanical central transmission (16) via an inhibiting lever rotation shaft (36) about which the inhibiting lever (30) pivots, causing the cylinder slider (12) to rotate freely in both directions displaced by the rotation of the cylinder (14) via the cylinder cam (11).

8. The self-locking mechanical-motorised three-point lock according to any one of the preceding claims, comprising an upper espagnolette bolt cover (23) arranged over the upper espagnolette bolt (3.1), a lower espagnolette bolt cover (24) arranged over the lower espagnolette bolt (3.2), a metal electronic box (25) arranged over the electronic circuit (34) and/or a central steel guard (22) arranged over the mechanical central transmission (16).

9. The self-locking mechanical-motorised three-point lock according to any one of the preceding claims, wherein the mechanical central transmission (16) comprises a micro-switch (27) such that, when the die (26) is moved, it comes in contact with said microswitch (27), which sends a signal indicating the position of the open/closed lock.

10. The self-locking mechanical-motorised three-point lock according to any one of the preceding claims, wherein the lock comprises a magnet (33) arranged in a striker (32), in a position facing the circuit (34) so that, when it detects that the front (2) is facing the striker (32), it causes the mechanical central transmission (16), and therefore the upper and lower satellite transmissions (7.1, 7.2), to move, causing the deadbolts (4.1, 4.2, 4.3) to swivel from the open lock position to the closed lock position.

11. The self-locking mechanical-motorised three-point lock according to any one of the preceding claims, wherein the deadbolts (4, 4.1, 4.2) are "parrot beak" deadbolts.

Drawing