Door lock including a locking mechanism for a deadbolt
The door lock mechanism with a deadbolt locking system using a groove and elastic return device ensures the deadbolt remains locked, addressing vulnerabilities in existing locks by maintaining the deadbolt in a locked position despite attempted manipulation.
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2026-03-20
AI Technical Summary
Existing door locks with deadbolts are vulnerable to break-ins as burglars can easily manipulate internal components to move the deadbolt from a locked to an unlocked position after breaking the cylinder.
A door lock mechanism featuring a deadbolt locking system with a lower and upper groove system, an elastic return device, and a locking member that moves between tracking and locking configurations, ensuring the deadbolt remains locked by gravity, even if the grooves are manipulated asynchronously.
The mechanism provides enhanced security by preventing the deadbolt from being unlocked, even with forced manipulation, ensuring reliable anti-burglary effectiveness through a simple and effective design.
Smart Images
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Abstract
Description
Title of the invention: Door lock comprising a locking mechanism for a deadbolt Scope of the invention
[0001] The present invention relates to a door lock comprising a bolt locking element adapted to prevent the bolt from moving from a locked position to an unlocked position of the door in the event of a break-in. Prior art
[0002] It is known to use a lock comprising at least one deadbolt. In the locked position, the deadbolt is housed in a strike plate fixed in the door frame of the door to be protected, which prevents the door from being opened.
[0003] Often, a burglar wishing to open the door begins by breaking the cylinder in order to extract it from the door lock case. Once this task has been accomplished, the burglar has access to the internal components of the lock and can therefore easily move the deadbolt from the locked position to an unlocked position in which the deadbolt is outside the strike plate that previously held it.
[0004] One possibility for the burglar is to lift an internal groove in the lock, which releases the deadbolt from any translational blockage. The burglar can then move the deadbolt into the unlocked position. It should be noted that the burglar can also drill the lock in an attempt to reach the groove designed to block the deadbolt from translational movement.
[0005] To reduce the risk of this type of break-in, suitable protective devices are known to delay the opening of a door. For example, it is already known to use two independent, vertically moving grooves, both of which must be moved simultaneously to allow the deadbolt to be released.
[0006] Consequently, the burglar will be hindered in his attempt to break in since it is difficult to move both throats simultaneously.
[0007] Another possibility is to provide that the two independent grooves cooperate by contact, with return means applying a force on one of the grooves so as to generate a relative displacement of the grooves when the contact is broken by a slight offset between the grooves.
[0008] The groove displaced by the return means is then in the path of the deadbolt's tail. By obstructing the deadbolt's tail, the displaced groove prevents any movement of the deadbolt. Reference may be made, in particular, to patent EP 1 561 885, which describes such a device.
[0009] It is also known from document FR 2 963 634 that the device has two grooves and return means capable of displacing one of the grooves in the event of desynchronization of their movements. This document also describes a locking member designed to block the groove not displaced by the return means in translation. The undisplaced groove is held in a position that blocks the deadbolt in translation.
[0010] Although the devices described above provide security against break-ins, it remains necessary to design locks including improved deadbolt blocking means that are effective, reliable and of simple design.
[0011] The present invention aims to resolve all or part of the disadvantages mentioned above. Description of the invention
[0012] To this end, the present invention relates to a door lock comprising a deadbolt and an operating member having a cam configured to cooperate with the deadbolt so as to move the deadbolt by translation along a locking direction between a locked position and an unlocked position of the door, the lock further including a deadbolt locking mechanism comprising:
[0013] a lower groove configured to be moved by the cam in a holding direction transverse to the locking direction between a holding position in which the lower groove blocks the deadbolt in the locking direction and a raised position in which the lower groove allows movement of the deadbolt in the locking direction by the cam,
[0014] an upper groove configured to be moved with the lower groove in the direction of retention by the cam, the upper groove being configured to cooperate with the lower groove so as to be held in position relative to the lower groove in the locking direction when the lower and upper grooves move in the direction of retention,
[0015] an elastic return device configured to apply a force to the upper groove, said force being configured to move the upper groove relative to the lower groove when the lower and upper grooves are offset along the holding direction beyond a defined distance,
[0016] a deadbolt locking member capable of being in a tracking configuration in which the locking member rests by gravity on and follows the movements of the upper groove and alternatively in a locking configuration, occurring following the movement of the upper groove relative to the lower groove and an interruption of contact between the upper groove and the locking member, in which the member the locking mechanism descends by gravity to a locking position, the locking device being configured so that, in the locking position, it is positioned on a stroke of the deadbolt between the locking position and the unlocking position so as to prevent the deadbolt from returning to the unlocking position from the locking position.
[0017] The proposed lock is reliable because the locking element is directly positioned on the travel of the deadbolt to prevent it from returning to the unlocked position.
[0018] Thus, in the event of a break-in, a burglar begins by removing the operating mechanism and continues by trying to move the lower groove and the upper groove towards the raised position.
[0019] In the absence of a cam, it is very difficult for a burglar to move the lower and upper grooves simultaneously. In the event of asynchronous movement resulting in a shift beyond the defined distance, the elastic return device moves the upper groove.
[0020] The defined distance corresponds to the amplitude of movement of the upper groove relative to the lower groove along the holding direction allowing it to remain in tracking configuration.
[0021] Following the displacement of the upper groove, the locking member no longer rests on the upper groove and descends by gravity into the locking position.
[0022] It therefore appears that the locking member is in precarious equilibrium which is maintained only by the movement of the lower and upper grooves by the cam.
[0023] Any attempt to force the lock will therefore be punished by the movement of the locking mechanism into the locked position. The lock described is thus reliable because the deadbolt's position in the unlocked position is directly prevented by the presence of a part in its travel.
[0024] Preferably, the operating mechanism is a barrel-type lock cylinder that passes through the thickness of the door lock. The cam, which is integral with the rotor of the cylinder, is mounted to rotate freely within the lock.
[0025] In this case, the rotation of the cam is achieved by means of a key engaged in the cylinder. The cam is designed to cooperate with the lower and upper grooves when rotated by the key.
[0026] According to one aspect of the invention, the locking member is configured to be free according to one degree of freedom only in translation parallel to the holding direction.
[0027] It thus appears that in the tracking configuration, the upper groove and the locking member move jointly parallel to each other.
[0028] This parallel movement is due to the cam which moves by contact the upper groove which itself moves the locking member.
[0029] The fact that the movement of the locking member is limited to a translation and that The fact that the lock reaches the locked position due to gravity is a reliability criterion. Furthermore, the mechanism's simple design facilitates lock manufacturing while ensuring high anti-burglary effectiveness.
[0030] According to one aspect of the invention, the lock comprises a case configured to house the deadbolt, the operating member, the lower groove, the upper groove, the elastic return device and the locking member; the case having a guide adapted to cooperate with the locking member.
[0031] The locking member is an important element for securing the lock; the guide thus ensures that the locking member follows the intended trajectory in the following configuration and in the locking configuration.
[0032] According to one aspect of the invention, the guide is a straight light formed in the housing adapted to cooperate with a portion of complementary shape of the locking member so as to allow free sliding of the locking member.
[0033] The construction of the guide is thus simple since it consists of a straight light. The lock case comprises two flanges arranged to cooperate together. The straight light is provided in one of the flanges.
[0034] Furthermore, each flange has a central opening adapted to the cross-section of the operating member.
[0035] According to one aspect of the invention, the upper groove extends parallel to a plane of the lock defined by the locking direction and the holding direction, the upper groove having a return transverse to the plane of the lock and configured to cooperate by complementarity of form with an indexer of the locking member in tracking configuration.
[0036] This configuration allows the upper groove to be defined as a protective plate extending parallel to the plane of the lock. Indeed, the deadbolt extends between the upper and lower grooves transversely to the plane of the lock.
[0037] Moreover, the return allows cooperation with the indexer in a reliable manner by complementarity of form in tracking configuration.
[0038] According to one aspect of the invention, in the locking configuration, the return of the upper groove is moved along the locking direction relative to the tracking configuration so as to allow the movement of the locking member towards the locking position.
[0039] This geometry ensures that, when the upper groove is moved into the locking configuration, it never comes into contact with the locking member.
[0040] In particular, the locking member comprises a leg extending towards the upper groove. This leg itself comprises a body from which the indexer extends so as to create a gap transverse to the plane of the lock for the free passage of the return in blocking configuration.
[0041] According to one aspect of the invention, the upper groove has a housing adapted to receive a displacement arm of the elastic return device, the elastic return device comprising a torsion spring including said displacement arm.
[0042] According to one aspect of the invention, the torsion spring is placed around a support pillar of the lock mounted on a flange. Preferably, the torsion spring includes a support arm designed to abut against one of the flanges.
[0043] According to one aspect of the invention, the housing is provided in the return at a location distinct from the location intended to cooperate with the blocking member.
[0044] According to one aspect of the invention, the upper groove has an L-shaped angled notch configured to receive and manipulate a lug of the lower groove so as to maintain the upper groove in position relative to the lower groove in tracking configuration and to allow relative movement of the upper groove relative to the lower groove in blocking configuration.
[0045] In particular, the part of the "L" parallel to the holding direction or first opening blocks the upper groove in the following configuration and the part of the "L" parallel to the locking direction or second opening allows a movement of the upper groove relative to the lower groove.
[0046] The first opening is sized to correspond to the width of the lug of the lower groove. This first opening then forms a stop against any movement parallel to the locking direction for the upper groove.
[0047] The second opening, for its part, is larger than the width of the lug and can allow limited movement under the effect of the elastic return device in the locking direction, but still does not allow it to be released from the upper groove.
[0048] The lug can also come out of the angled notch, which results in the upper groove being moved under the effect of the elastic return device.
[0049] The upper groove has the return at the lateral end opposite the angled notch.
[0050] According to one aspect of the invention, when the lug of the lower groove is constrained in its movement in the second opening of the upper groove, the lower groove remains in the holding position, the deadbolt being blocked according to the locking direction.
[0051] The locking member then finds itself in the locking position in the straight light of the flange.
[0052] In this locked position, the leg of the locking mechanism is positioned in the retraction path of the deadbolt, thus preventing any attempt to translation of the latter from the locked position to the unlocked position.
[0053] According to one aspect of the invention, the upper groove has an oblong light extending parallel to the direction of retention in tracking configuration, the lock being provided with a central pillar cooperating with the oblong light.
[0054] In the locked configuration, the elastic return device is configured to rotate the upper groove around the central pillar. Depending on the position of the lug, the rotation will be limited when the lug is in the angled notch or will be limited until it abuts the flange when the lug is out of the angled notch. In both cases, rotation results in the locking configuration.
[0055] Furthermore, the central pillar is attached to the case. This central pillar also serves as a guide for the lower groove, which has a dedicated opening allowing its movement in the direction of retention. The deadbolt also has a longitudinal opening extending in the locking direction, allowing its movement.
[0056] According to one aspect of the invention, the lower groove and the upper groove each have a cam profile adapted to cooperate with the bit so as to allow movement along the holding direction.
[0057] The movements of the lower and upper grooves can be slightly asynchronous according to their respective cam profiles. Their cam profiles are configured so that the cam moves them while remaining in tracking configuration.
[0058] In particular, the lower groove has a half-loop forming a cam profile adapted to cooperate with the bit. The movement of the lower and upper grooves along the holding direction is actuated by the cooperation of the bit with the cam profile of the half-loop and a "V"-shaped profile of the upper groove.
[0059] The cam profile of the lower groove has a protrusion which forces the lower groove to be pushed by the bit, the same is true for the action of the bit against the cam profile of the upper groove, causing them to follow the movement in the direction of retention described previously.
[0060] In a position conducive to the release of the deadbolt, the lower groove and the upper groove are in a raised position without being displaced relative to each other, and thus the lug of the lower groove always remains positioned in the first opening of the upper groove.
[0061] The deadbolt is then released and can be moved in translation, causing the lock to unlock.
[0062] However, if it is tempted to manipulate the lower or upper throat independently, the spur disengages from its cooperation with the first opening.
[0063] In the case where the upper groove is manipulated in an offset manner beyond the At a defined distance from the lower groove, the lug enters the second opening of the angled notch in the upper groove. The action of the torsion spring then forces the upper groove to pivot around the central pillar, causing the lug to come to rest against the end of the angled notch.
[0064] According to one aspect of the invention, the deadbolt has a plurality of teeth aligned along the locking direction and in which the lower groove has a relief complementary to at least one tooth so as to, in the raised position, block the deadbolt by cooperating by complementarity of form.
[0065] The raised position of the lower groove is reached in the locked and unlocked positions of the deadbolt.
[0066] In a locked position of the deadbolt, the lower groove is in a holding position such that the upper part of its opening abuts against the central pillar. In this position, the relief of the lower groove engages with the deadbolt against one or more teeth, depending on the geometry of the lower groove chosen.
[0067] According to one aspect of the invention, the deadbolt has an additional plurality of teeth arranged to cooperate with the cam for the passage from the locking position to the unlocking position and vice versa.
[0068] The different aspects defined above, which are not incompatible, can be combined. Brief description of the figures
[0069] The invention will be better understood with the aid of the detailed description set out below in relation to the accompanying drawings.
[0070] [Fig-1] is a perspective view of a lock without its case comprising a bolt dormant, a lower groove and an upper groove, and in which the lock is represented in a locked position where the deadbolt is extended.
[0071] [Fig.2] is a perspective view of the lock, in which the upper groove is translated independently of the lower throat,
[0072] [Fig.3] is a perspective view of the lock in which the lower groove is translated independently of the upper throat,
[0073] [Fig.4] is a perspective view of the lock in which the upper groove is pivoted by the action of a torsion spring,
[0074] [Fig.5] is a first detailed perspective view in which the throat su The upper part is not displaced by the action of the torsion spring.
[0075] [Fig.6] is a second detailed perspective view in which the throat su The upper part is pivoted by the action of the torsion spring.
[0076] [Fig.7] is a third perspective detail view in which the throat su The upper part is pivoted by the action of the torsion spring.
[0077] [Fig.8] is an overview of the lock in the deadbolt locking position. Description with reference to the figures
[0078] In the detailed description that will follow of the figures defined above, the same elements or elements fulfilling identical functions may retain the same references in order to simplify the understanding of the invention.
[0079] As illustrated in Figures 1 to 8, a door lock 1 comprises a deadbolt 3 and an operating member 5 provided with a cam 7 configured to cooperate with the deadbolt 3 so as to move the deadbolt 3 by translation along a locking direction 9 between a locking position as in [Fig. 1] and an unlocking position of the door.
[0080] The lock 1 further includes a deadbolt locking mechanism comprising a lower groove 11, an upper groove 13, the elastic return device 15 and a locking member 17.
[0081] The lower groove 11 is configured to be moved by the cam 7 along a holding direction 19 transverse to the locking direction 9 between a holding position as shown in [Fig.1] in which the lower groove 11 blocks the deadbolt 3 along the locking direction 9 and a raised position in which the lower groove 11 allows movement of the deadbolt 3 along the locking direction 9 by the cam 7.
[0082] The upper groove 13 is configured to be moved with the lower groove 11 according to the holding direction 19 by the cam 7.
[0083] The upper groove 13 is configured to cooperate with the lower groove 11 so as to be held in position relative to the lower groove 11 in the locking direction 19 when the lower groove 11 and the upper groove 13 move in the holding direction 19.
[0084] The elastic return device 15 is configured to apply a force on the upper groove 13 to move the upper groove 13 relative to the lower groove 11 when the lower groove 11 and the upper groove 13 are offset along the holding direction 19 beyond a defined distance.
[0085] The locking member 17 of the deadbolt 3 is capable of being in a tracking configuration as illustrated in [Fig. 1] and 5 in which the locking member 17 rests by gravity on and follows the movements of the upper groove 13.
[0086] Alternatively, in a blocking configuration illustrated in figures 4 and 8, occurring following the displacement of the upper groove 13 relative to the lower groove 11 and an interruption of the contact between the upper groove 13 and the blocking member 17, the blocking member 17 descends by gravity to a blocking position.
[0087] The locking member 17 is configured so that, in the locked position, it is disposed on a stroke of the deadbolt 3 between the locked position and the unlocked position rusting so as to prevent deadbolt 3 from returning to the unlocked position from the locked position.
[0088] The operating member 5 is a barrel-type lock cylinder passing through the thickness of the door lock 1. The cam 3, integral with a rotor of the barrel, is mounted to rotate freely within the lock 1.
[0089] In this case, the rotation of the cam 7 is achieved by means of a key engaged in said cylinder. The cam 7 is intended to cooperate with the lower groove 11 and the upper groove 13 when it is rotated by means of the key.
[0090] The locking member 17 is configured to be free along one degree of freedom only in translation parallel to the holding direction 19.
[0091] The lock 1 includes a case 21 configured to house the deadbolt 3, the operating member 5, the lower groove 11, the upper groove 13, the elastic return device 15 and the locking member 17; the case 21 having a guide 23 adapted to cooperate with the locking member 17.
[0092] The guide 23 is a straight light formed in the case 21 adapted to cooperate with a portion of complementary shape of the locking member 17 so as to allow free sliding of the locking member 17.
[0093] The lock 1 compartment 21 comprises two flanges arranged to cooperate together. The straight light is provided in one of the flanges.
[0094] Furthermore, each flange has a central opening adapted to the cross-section of the operating member 5.
[0095] The upper groove 13 extends parallel to a plane 25 of the lock 1 defined by the locking direction 9 and the holding direction 19, the upper groove 13 having a return 27 transverse to the plane 25 of the lock 1 and configured to cooperate by complementarity of form with an indexer 29 of the locking member 17 in tracking configuration.
[0096] This configuration allows the upper groove 13 to be defined as a protective plate extending parallel to the plane 25 of the lock 1. Indeed, the deadbolt 3 extends between the upper groove 13 and the lower groove 11 transversely to the plane 25 of the lock 1.
[0097] In the locking configuration, the return 27 of the upper groove 13 is moved along the locking direction 9 relative to the tracking configuration so as to allow the movement of the locking member 17 towards the locking position.
[0098] This geometry ensures that, when the upper groove 13 is moved into the locking configuration, it never comes into contact with the locking member 17.
[0099] The locking member 17 comprises a leg 31 extending towards the upper groove 13. This leg 31 itself comprises a body from which the indexer 29 extends so as to create a gap 33 transversely to the plane 25 of the lock 1 for free passage of return 27 in blocking configuration.
[0100] The upper groove 13 has a housing 35 adapted to receive a displacement arm 37 of the elastic return device 15, the elastic return device 15 comprising a torsion spring 39 including said displacement arm 37.
[0101] The torsion spring 39 is positioned around a support pillar 41 of the lock 1 mounted on a flange. The torsion spring 39 includes a support arm 43 designed to abut against one of the flanges.
[0102] The housing 35 is provided in the return 27 at a location separate from the location intended to cooperate with the blocking device 17.
[0103] As seen in [Fig.2], the upper groove 13 has an L-shaped angled notch 45 configured to receive and manipulate a lug 47 of the lower groove 11 so as to hold the upper groove 13 in position relative to the lower groove 11 in the tracking configuration and to allow relative movement of the upper groove 13 relative to the lower groove 11 in the locking configuration.
[0104] The part of the "L" parallel to the holding direction 19 or first opening 49 blocks the upper groove 13 in the following configuration and the part of the "L" parallel to the locking direction 9 or second opening 51 allows a movement of the upper groove 13 relative to the lower groove 11.
[0105] The first opening 49 is dimensioned to correspond to the width of the lug 47 of the lower groove 11. This first opening 49 then forms a stop against any movement parallel to the locking direction 9 for the upper groove 13.
[0106] The second opening 51, for its part, is larger than the width of the lug 47 and can allow limited movement under the effect of the elastic return device 15 in the locking direction 9, but still does not allow it to be released from the upper groove 13.
[0107] The lug 47 can also come out of the bent notch 45, which results in the upper groove 13 being moved by the elastic return device 15.
[0108] The upper groove 13 has the return 27 at the lateral end opposite the bent notch 45.
[0109] When the lug 47 of the lower groove 11 is constrained in its movement in the second opening 51 of the upper groove 13, the lower groove 11 remains in the holding position, the deadbolt 3 being blocked according to the locking direction 9.
[0110] The locking member 17 then finds itself in the locking position in the straight light of the flange.
[0111] In this locking position, the leg 31 of the locking member 17 is positioned in the retraction stroke of the deadbolt 3, thus preventing any attempt to translate the latter from the locking position to the unlocking position.
[0112] The upper groove 13 has an oblong light 53 extending parallel to the holding direction 19 in tracking configuration, the lock 1 being provided with a central pillar 55 cooperating with the oblong light 53.
[0113] In the locking configuration, the elastic return device 15 is configured to rotate the upper groove 13 around the central pillar 55. Depending on the position of the lug 47, the rotation will be limited when the lug 47 is in the angled notch 45 or until it abuts the flange when the lug 47 is out of the angled notch 45. In both cases, a rotation implies switching to the locking configuration.
[0114] Furthermore, the central pillar 55 is attached to the case 21. This central pillar 55 is also used as a guide for the lower groove 11 which has a dedicated opening allowing its movement along the holding direction 19. The deadbolt 3 also has a longitudinal opening 57 extending along the locking direction 19 and allowing its movement.
[0115] The lower groove 11 and the upper groove 13 each have a cam profile 59 adapted to cooperate with the bit 7 so as to allow movement along the holding direction 19.
[0116] The lower groove 11 has a half-loop 61 forming a cam profile 59 suitable for cooperating with the bit 7. The movement of the lower groove 11 and the upper groove 13 along the holding direction 19 is actuated by the cooperation of the bit 7 with the cam profile 59 of the half-loop 61 and a "V" profile of the upper groove 13.
[0117] The cam profile 59 of the lower groove 11 has a protrusion which forces the lower groove 11 to be pushed by the bit 7, the same is true for the action of the bit 7 against the cam profile 59 of the upper groove 13, causing them to follow the movement in the direction of retention described previously.
[0118] In a position conducive to the release of the deadbolt 3, the lower groove 11 and the upper groove 13 are in a raised position without being displaced relative to each other, and thus the lug 47 of the lower groove 11 always remains positioned in the first opening 51 of the upper groove 13.
[0119] The deadbolt 3 is then released and can be moved in translation, causing the lock 1 to be unlocked.
[0120] However, if it is tempted to manipulate the lower groove 11 or the upper groove 13 independently, the ergot 47 disengages from its cooperation with the first opening 49.
[0121] In the case where the upper groove 13 is manipulated in an offset manner beyond the defined distance with the lower groove 11, the lug 47 enters the second opening 51 of the angled notch 45 of the upper groove 13.
[0122] Thus, the action of the torsion spring 39 forces the upper groove 13 to pivot around the central pillar 55, thereby causing the lug 47 to come to rest against the end of the angled notch 45.
[0123] The deadbolt 3 has a plurality of teeth 63 aligned along the locking direction 9 and in which the lower groove 11 has a relief complementary to at least one tooth 63 so as to, in the raised position, block the deadbolt 3 by cooperating by complementarity of form.
[0124] The raised position of the lower groove 11 is reached in the locked and unlocked positions of the deadbolt 3.
[0125] In a deadbolt 3 locking position, the lower groove 11 is in a holding position such that the upper part of its light butts against the central pillar 55. In this position, the relief of the lower groove 11 is engaged with the deadbolt 3 against one or more teeth 63 depending on the geometry of the lower groove 11 chosen.
[0126] The deadbolt 3 has an additional plurality of teeth 63 arranged to cooperate with the cam 7 for the passage from the locked position to the unlocked position and vice versa.
[0127] The proposed lock 1 is reliable because the blocking member 17 is directly disposed on the stroke of the deadbolt 3 to prevent it from returning to the unlocked position.
[0128] Thus, in the event of a break-in, a burglar begins by removing the operating member 5 and continues by trying to move the lower groove 11 and the upper groove 13 towards the raised position.
[0129] In the absence of paneton 7, it is very difficult for the burglar to move the lower and upper grooves at the same time. We find ourselves in one of the two cases illustrated in figures 2 and 3.
[0130] In the event of non-synchronous movement causing a shift beyond the defined distance, the elastic return device moves the upper groove as illustrated in figures 4, 6, 7 and 8.
[0131] Following the displacement of the upper groove 13, the locking member 17 no longer rests on the upper groove 13 and descends by gravity into the locking position.
[0132] It therefore appears that the locking member 17 is in precarious equilibrium which is maintained only by the movement of the lower groove 11 and the upper groove 13 by the cam 7.
[0133] Any attempt to force the lock 1 will therefore be punished by the movement of the locking member 17 into the locked position. The lock 1 described is thus reliable because the deadbolt 3 is directly prevented from being in the unlocked position by the presence of a part in its travel.
[0134] As will be obvious, the invention is not limited to the single embodiment described As given above as an example, it actually encompasses all the variants of its realization.
Claims
Demands
1. A door lock (1) comprising a deadbolt (3) and an operating member (5) having a cam (7) configured to cooperate with the deadbolt (3) so as to move the deadbolt (3) by translation along a locking direction (9) between a locking position and an unlocking position of the door, the lock (1) further comprising a deadbolt locking mechanism comprising: - a lower groove (11) configured to be moved by the cam (7) along a holding direction (19) transverse to the locking direction (9) between a holding position in which the lower groove (11) blocks the deadbolt (3) along the locking direction (9) and a raised position in which the lower groove (11) allows movement of the deadbolt (3) along the locking direction by the cam (7),- an upper groove (13) configured to be moved with the lower groove (11) along the holding direction (19) by the cam (7), the upper groove (13) being configured to cooperate with the lower groove (11) so as to be held in position relative to the lower groove (11) along the locking direction (9) when the lower groove (11) and the upper groove (13) move along the holding direction (19), - an elastic return device (15) configured to apply a force to the upper groove (13), said force being configured to move the upper groove (13) relative to the lower groove (11) when the lower groove (11) and the upper groove (13) are offset along the holding direction (19) beyond a defined distance,- a locking member (17) of the deadbolt (3) capable of being in a tracking configuration in which the locking member (17) rests by gravity on and follows the movements of the upper groove (13) and alternatively in a locking configuration, occurring following the movement of the upper groove (13) relative to the lower groove (11) and an interruption of contact between the upper groove (13) and the locking member (17), in which the locking member (17) descends by gravity to a locking position, the locking member (17) being configured so as, in the locking position, to be disposed on a stroke of the deadbolt (3) between the locking position and the unlocking position so as to prevent the bolt, dormant (3) return to the unlocked position from the locked position.
2. Lock (1) according to claim 1, wherein the locking member (17) is configured to be free along one degree of freedom only in translation parallel to the holding direction (19).
3. Lock (1) according to any one of claims 1 or 2, comprising a case (21) configured to house the deadbolt (3), the operating member (5), the lower groove (11), the upper groove (13), the elastic return device (15) and the locking member (17); the case (21) having a guide (23) adapted to cooperate with the locking member (17).
4. Lock (1) according to claim 3, wherein the guide (23) is a straight light formed in the case (21) adapted to cooperate with a complementary shaped portion of the locking member (17) so as to allow free sliding of the locking member (17).
5. Lock (1) according to any one of claims 1 to 4, wherein the upper groove (13) extends parallel to a plane (25) of the lock (1) defined by the locking direction (9) and the holding direction (19), the upper groove (13) having a return (27) transverse to the plane (25) of the lock (1) and configured to cooperate by form complementarity with an indexer (29) of the locking member (17) in tracking configuration.
6. Lock (1) according to claim 5, wherein in the locking configuration, the return (27) of the upper groove (13) is moved along the locking direction (9) relative to the tracking configuration so as to permit the movement of the locking member (17) to the locking position.
7. Lock (1) according to any one of claims 1 to 6, wherein the upper groove (13) has a housing (35) adapted to receive a displacement arm (37) of the elastic return device (15), the elastic return device (15) comprising a torsion spring (39) including said displacement arm (37).
8. Lock (1) according to any one of claims 1 to 7, wherein the upper groove (13) has an L-shaped angled notch (45) configured to receive and manipulate a lug (47) of the lower groove (11) so as to maintain the upper groove (13) in position relative to the lower groove (11) in a tracking configuration and to allow relative movement of the upper groove (13) with respect to the lower groove (11) in blocking configuration.
9. Lock (1) according to any one of claims 1 to 8, wherein the upper groove (13) has an oblong light (53) extending parallel to the holding direction (19) in tracking configuration, the lock (1) being provided with a central pillar (55) cooperating with the oblong light (53).
10. Lock (1) according to any one of claims 1 to 9, wherein the lower groove (11) and the upper groove (13) each have a cam profile (59) adapted to cooperate with the cam (7) so as to permit movement along the holding direction (19).
11. Lock (1) according to any one of claims 1 to 10, wherein the deadbolt (3) has a plurality of teeth (63) aligned along the locking direction (9) and wherein the lower groove (11) has a relief complementary to at least one tooth (63) so as to, in the raised position, block the deadbolt (3) by cooperating by complementary shape.