Door lock including a locking member for a deadbolt

Abstract

Lock for door comprising a blocking member for deadbolt Lock (1) for door comprising a deadbolt (3) and an operating member (5) provided with a bit (7), the lock (1) further including a mechanism for blocking the deadbolt comprising: a lower groove (11); an upper groove (13); an elastic return device (15) configured to apply a force to the upper groove (13), a blocking member (17) of the deadbolt (3) capable of being in a tracking configuration in which the blocking member (17) rests by gravity on and follows the movements of the upper groove (13) and alternatively in a blocking configuration in which the blocking member (17) descends by gravity to a blocking position, the blocking member (17) being configured to be arranged on a stroke of the deadbolt (3) between the locking position and the unlocking position. Figure 1

Description

Title of the invention: Door lock comprising a locking member for a deadbolt Field of invention

[0001] The present invention relates to a door lock comprising a locking member for a bolt adapted to prevent movement of the bolt from a locking position to an unlocking 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 locking position, the deadbolt is housed in a strike plate fixed in the 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 barrel in order to extract it from the door lock casing. Once this task has been accomplished, the burglar has access to the internal organs 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 housed it.

[0004] One way to do this is for the burglar to lift an internal groove in the lock, which frees 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 order to try to reach the groove intended to block the deadbolt in translation.

[0005] To reduce the risks of break-ins of this type, protective devices are known which are adapted to delay the opening of a door. It is already known to use two independent grooves which can move in vertical translation, the two grooves having to be moved simultaneously to allow the release of the deadbolt.

[0006] Consequently, the burglar will be hampered in his attempt to break in since it is difficult to move both tumblers simultaneously.

[0007] Another possibility consists of providing that the two independent grooves cooperate by contact, return means applying a force on one of the grooves so as to cause a relative displacement of the grooves when the contact is broken by a slight offset between the grooves.

[0008] The groove moved by the return means is then on the path of the tail of the deadbolt. By obstructing the tail of the bolt, the moved groove prevents any movement of the deadbolt. Reference may in particular be made to patent EP 1 561 885 which describes such a device.

[0009] It is also known from document FR 2 963 634 to have two grooves and return means capable of moving one of the grooves in the event of desynchronization of their movements. This document also describes a locking member designed to block in translation the groove not moved by the return means. The non-moved groove is held in a position blocking the deadbolt in translation.

[0010] Although the devices described above provide security against break-ins, there remains a need to design locks comprising improved deadbolt locking means which are effective, reliable and of simple design.

[0011] The present invention aims to resolve all or part of the drawbacks mentioned above. Statement of the invention

[0012] To this end, the present invention relates to a door lock comprising a deadbolt and an operating member provided with a bit configured to cooperate with the deadbolt so as to move the deadbolt by translation in a locking direction between a locking position and an unlocking position of the door, the lock further including a mechanism for blocking the deadbolt comprising:

[0013] a lower groove configured to be moved by the bit 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 bit,

[0014] an upper groove configured to be moved with the lower groove in the holding direction by the bit, 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 groove and the upper groove move in the holding direction,

[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 groove and the upper groove are offset in the holding direction beyond a defined distance,

[0016] a deadbolt locking member adapted to be 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 blocking configuration, occurring following the movement of the upper groove relative to the lower groove and an interruption of the contact between the upper groove and the locking member, in which the locking member locking member descends by gravity to a locking position, the locking member being configured to, in the locking position, be arranged 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 member is directly arranged 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 member and continues by trying to move the lower groove and the upper groove to the raised position.

[0019] In the absence of a bit, it is very difficult for the burglar to move the lower groove and the upper groove at the same time. In the event of non-synchronous movement causing 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 in the holding direction allowing it to remain in the tracking configuration.

[0021] Following the movement 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 a precarious balance which is only maintained by the movement of the lower groove and the upper groove by the bit.

[0023] Any attempt to force the lock will therefore be punished by the movement of the locking member into the locking position. The lock described is thus reliable because the arrangement of the deadbolt in the unlocking position is directly prevented by the presence of a part on its travel.

[0024] Preferably, the operating member is a barrel-type lock cylinder passing through the thickness of the door lock. The bit, secured to the barrel rotor, is mounted to rotate in the lock.

[0025] The rotation of the bit is obtained, in this case, using a key engaged in said barrel. The bit is intended to cooperate with the lower groove and the upper groove when it is rotated using 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 bit 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 arrival in the locking position is due to gravity and is a reliability criterion. Furthermore, it is a simple design mechanism which facilitates the manufacture of the lock while guaranteeing high anti-burglary efficiency.

[0030] According to one aspect of the invention, the lock comprises a box configured to house the deadbolt, the operating member, the lower groove, the upper groove, the elastic return device and the locking member; the box 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 makes it possible to ensure that the locking member follows the intended trajectory in the tracking configuration and in the locking configuration.

[0032] According to one aspect of the invention, the guide is a rectilinear light formed in the box capable of cooperating with a complementary shaped portion 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 is a rectilinear light. The lock casing comprises two flanges arranged to cooperate together. The rectilinear light is arranged in one of the flanges.

[0034] Furthermore, each flange has a central opening adapted to the 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 shape with an indexer of the locking member in the tracking configuration.

[0036] This configuration makes it possible to define the upper groove as a protective plate extending parallel to the plane of the lock. In fact, the deadbolt extends between the upper groove and the lower groove transversely to the plane of the lock.

[0037] Furthermore, the return makes it possible to cooperate with the indexer reliably by complementarity of shape in tracking configuration.

[0038] According to one aspect of the invention, in the locking configuration, the return of the upper groove is moved in 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 an empty space transversely to the plane of the lock for 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 branch of the elastic return device, the elastic return device comprising a torsion spring including said displacement branch.

[0042] According to one aspect of the invention, the torsion spring is placed around a support pillar of the lock attached to a flange. Preferably, the torsion spring comprises a support branch designed to come into abutment against one of the flanges.

[0043] According to one aspect of the invention, the housing is provided in the return at a location separate from the location intended to cooperate with the locking member.

[0044] According to one aspect of the invention, the upper groove has an angled notch in the shape of an “L” 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 the tracking configuration and to allow relative movement of the upper groove relative to the lower groove in the locking configuration.

[0045] In particular, the part of the “L” parallel to the holding direction or first opening blocks the upper groove in the tracking configuration and the part of the “L” parallel to the locking direction or second opening allows 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 to any movement parallel to the locking direction for the upper groove.

[0047] The second opening, for its part, is of a dimension greater 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 free itself from the upper groove.

[0048] The lug can also come out of the angled notch, which has the consequence of moving the upper groove 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 in the locking direction.

[0051] The locking member is then in the locking position in the straight lumen of the flange.

[0052] In this locking position, the leg of the locking member is positioned in the retraction stroke of the deadbolt, thus preventing any attempt to translation of the latter from the locking position to the unlocking position.

[0053] According to one aspect of the invention, the upper groove has an oblong slot extending parallel to the holding direction in the tracking configuration, the lock being provided with a central pillar cooperating with the oblong slot.

[0054] In the locking configuration, the elastic return device is configured to move the upper groove in rotation 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 until it stops on the flange when the lug is outside the angled notch. In both cases, a rotation involves moving to the locking configuration.

[0055] Furthermore, the central pillar is attached to the trunk. This central pillar is also used as a guide for the lower groove which has a dedicated opening allowing its movement in the holding direction. The deadbolt also has a longitudinal opening extending in the locking direction and 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 in the holding direction.

[0057] The movements of the lower groove and the upper groove may be slightly asynchronous according to their respective cam profiles. Their cam profiles are configured so that the bit moves them while remaining in the tracking configuration.

[0058] In particular, the lower groove has a half-handle forming a cam profile capable of cooperating with the bit. The movement of the lower groove and the upper groove in the holding direction is actuated by the cooperation of the bit with the cam profile of the half-handle and a “V” profile of the upper groove.

[0059] The cam profile of the lower groove has a protrusion which thus 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, thus causing them to follow the movement in the holding direction described above.

[0060] In a position suitable for releasing the deadbolt, the lower groove and the upper groove are in the raised position without being moved 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 an attempt is made to manipulate the lower groove or the upper groove independently, the lug disengages from its cooperation with the first opening.

[0063] In the case where the upper groove is manipulated in an offset manner beyond the defined distance with the lower groove, the lug enters the second opening of the angled notch of the upper groove. Thus, the action of the torsion spring forces the upper groove to pivot around the central pillar, thus causing the lug 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 in 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 shape.

[0065] The raised position of the lower groove is reached in the locked position and in the unlocked position of the deadbolt.

[0066] In a deadbolt locking position, the lower groove is in the holding position such that the upper part of its slot abuts against the central pillar. In this position, the relief of the lower groove is engaged 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 bit for the transition 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 which is set out below with reference to the appended drawings.

[0070] [Fig-1] is a perspective view of a lock without its case comprising a bolt deadbolt, a lower groove and an upper groove, and in which the lock is shown in a locking 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 groove,

[0072] [Fig.3] is a perspective view of the lock in which the lower groove is translated independently of the upper groove,

[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 groove on upper part is not moved by the action of the torsion spring,

[0075] [Fig.6] is a second perspective detail view in which the groove on upper part is pivoted by the action of the torsion spring,

[0076] [Fig.7] is a third perspective detail view in which the groove on upper part is pivoted by the action of the torsion spring,

[0077] [Fig.8] is an overall view of the lock in the deadbolt locking position. Description with reference to figures

[0078] In the detailed description which follows of the figures defined above, the same elements or the elements fulfilling identical functions may retain the same references so as 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 bit 7 configured to cooperate with the deadbolt 3 so as to move the deadbolt 3 by translation in a locking direction 9 between a locking position as in [Fig.l] and a door unlocking position.

[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 bit 7 in a holding direction 19 transverse to the locking direction 9 between a holding position as shown in [Fig.l] in which the lower groove 11 blocks the deadbolt 3 in the locking direction 9 and a raised position in which the lower groove 11 allows movement of the deadbolt 3 in the locking direction 9 by the bit 7.

[0082] The upper groove 13 is configured to be moved with the lower groove 11 in the holding direction 19 by the bit 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 to 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 in 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.l] 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 locking configuration illustrated in Figures 4 and 8, occurring following the movement of the upper groove 13 relative to the lower groove 11 and an interruption of the contact between the upper groove 13 and the locking member 17, the locking member 17 descends by gravity to a locking position.

[0087] The locking member 17 is configured to, in the locking position, be arranged on a stroke of the deadbolt 3 between the locking position and the unlocking position. locking 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 bit 3, secured to a rotor of the barrel, is mounted to rotate in the lock 1.

[0089] The rotation of the bit 7 is obtained, in this case, using a key engaged in said barrel. The bit 7 is intended to cooperate with the lower groove 11 and the upper groove 13 when it is rotated using the key.

[0090] The locking member 17 is configured to be free according to one degree of freedom only in translation parallel to the holding direction 19.

[0091] The lock 1 comprises a casing 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 casing 21 having a guide 23 adapted to cooperate with the locking member 17.

[0092] The guide 23 is a rectilinear light formed in the box 21 capable of cooperating with a complementary shaped portion of the locking member 17 so as to allow free sliding of the locking member 17.

[0093] The casing 21 of the lock 1 comprises two flanges arranged to cooperate together. The rectilinear light is provided in one of the flanges.

[0094] Furthermore, each flange comprises a central opening adapted to the 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 shape with an indexer 29 of the blocking member 17 in the tracking configuration.

[0096] This configuration makes it possible to define the upper groove 13 as a protective plate extending parallel to the plane 25 of the lock 1. In fact, 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 in 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 an empty space 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 branch 37 of the elastic return device 15, the elastic return device 15 comprising a torsion spring 39 including said displacement branch 37.

[0101] The torsion spring 39 is placed around a support pillar 41 of the lock 1 attached to a flange. The torsion spring 39 comprises a support branch 43 designed to come into abutment 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 locking member 17.

[0103] As visible in [Fig.2], the upper groove 13 has an angled notch 45 in the shape of an “L” 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 tracking configuration and the part of the “L” parallel to the locking direction 9 or second opening 51 allows movement of the upper groove 13 relative to the lower groove 11.

[0105] The first opening 49 is sized to correspond to the width of the lug 47 of the lower groove 11. This first opening 49 then forms a stop to any movement parallel to the locking direction 9 for the upper groove 13.

[0106] The second opening 51, for its part, is of a dimension greater 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, however still not allowing it to free itself from the upper groove 13.

[0107] The lug 47 can also come out of the angled notch 45, which has the consequence of moving the upper groove 13 under the effect of the elastic return device 15.

[0108] The upper groove 13 has the return 27 at the lateral end opposite the angled 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 in the locking direction 9.

[0110] The locking member 17 is then in the locking position in the rectilinear lumen 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 slot 53 extending parallel to the holding direction 19 in the tracking configuration, the lock 1 being provided with a central pillar 55 cooperating with the oblong slot 53.

[0113] In the locking configuration, the elastic return device 15 is configured to move the upper groove 13 in rotation 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 stops on the flange when the lug 47 is outside the angled notch 45. In both cases, a rotation involves moving to the locking configuration.

[0114] Furthermore, the central pillar 55 is attached to the box 21. This central pillar 55 is also used as a guide for the lower groove 11 which has a dedicated opening allowing its movement in the holding direction 19. The deadbolt 3 also has a longitudinal opening 57 extending in 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 in the holding direction 19.

[0116] The lower groove 11 has a half-handle 61 forming a cam profile 59 capable of cooperating with the bit 7. The movement of the lower groove 11 and the upper groove 13 in the holding direction 19 is actuated by the cooperation of the bit 7 with the cam profile 59 of the half-handle 61 and a “V” profile of the upper groove 13.

[0117] The cam profile 59 of the lower groove 11 has a protrusion which thus 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, thus causing them to follow the movement in the holding direction described previously.

[0118] In a position suitable for releasing the deadbolt 3, the lower groove 11 and the upper groove 13 are in the raised position without being moved 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 unlock.

[0120] However, if an attempt is made to manipulate the lower groove 11 or the upper groove 13 independently, the lug 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 distance defined with the lower groove 11, the lug 47 penetrates into 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, thus causing the lug 47 to rest against the end of the angled notch 45.

[0123] The deadbolt 3 has a plurality of teeth 63 aligned in 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 shape.

[0124] The raised position of the lower groove 11 is reached in the locked position and in the unlocked position of the deadbolt 3.

[0125] In a locking position of the deadbolt 3, the lower groove 11 is in the holding position such that the upper part of its slot abuts 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 bit 7 for the transition from the locking position to the unlocking position and vice versa.

[0127] The proposed lock 1 is reliable because the locking member 17 is directly arranged on the travel 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 to the raised position.

[0129] In the absence of a 7-paneton, it is very difficult for the burglar to move the lower groove and the upper groove 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 an offset beyond the defined distance, the elastic return device moves the upper groove as illustrated in Figures 4, 6, 7 and 8.

[0131] Following the movement 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 a precarious equilibrium which is only maintained by the movement of the lower groove 11 and the upper groove 13 by the bit 7.

[0133] Any attempt to force the lock 1 will therefore be punished by the movement of the locking member 17 into the locking position. The lock 1 described is thus reliable because the arrangement of the deadbolt 3 in the unlocking position is directly prevented by the presence of a part on its travel.

[0134] As goes without saying, the invention is not limited to the single embodiment described. above as an example, it on the contrary embraces all the variants of realization.

Claims

Claims

1. Lock (1) for a door comprising a deadbolt (3) and an operating member (5) provided with a bit (7) configured to cooperate with the deadbolt (3) so as to move the deadbolt (3) by translation in a locking direction (9) between a locking position and an unlocking position of the door, the lock (1) further including a mechanism for blocking the deadbolt comprising: - a lower groove (11) configured to be moved by the bit (7) in a holding direction (19) transverse to the locking direction (9) between a holding position in which the lower groove (11) blocks the deadbolt (3) in the locking direction (9) and a raised position in which the lower groove (11) allows movement of the deadbolt (3) in the locking direction by the bit (7),- an upper groove (13) configured to be moved with the lower groove (11) in the holding direction (19) by the bit (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) in the locking direction (9) when the lower groove (11) and the upper groove (13) move in 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 in 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 the 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 to, in the locking position, be arranged on a stroke of the deadbolt (3) between the locking position and the unlocking position so as to prevent the bolt, sleeper (3) return to unlock position from locking position.

2. Lock (1) according to claim 1, in which the locking member (17) is configured to be free according to one degree of freedom only in translation parallel to the holding direction (19).

3. Lock (1) according to one of claims 1 or 2, comprising a box (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 box (21) having a guide (23) adapted to cooperate with the locking member (17).

4. Lock (1) according to claim 3, in which the guide (23) is a rectilinear light formed in the box (21) capable of cooperating 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 one of claims 1 to 4, in which 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 shape with an indexer (29) of the blocking member (17) in the tracking configuration.

6. Lock (1) according to claim 5, in which in the locking configuration, the return (27) of the upper groove (13) is moved in the locking direction (9) relative to the tracking configuration so as to allow the movement of the locking member (17) towards the locking position.

7. Lock (1) according to one of claims 1 to 6, in which the upper groove (13) has a housing (35) adapted to receive a displacement branch (37) of the elastic return device (15), the elastic return device (15) comprising a torsion spring (39) including said displacement branch (37).

8. Lock (1) according to one of claims 1 to 7, in which the upper groove (13) has an angled notch (45) in the shape of an “L” 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 the tracking configuration and to allow relative movement of the upper groove (13) relative to the lower groove (11) in the locking configuration.

9. Lock (1) according to one of claims 1 to 8, in which the upper groove (13) has an oblong slot (53) extending parallel to the holding direction (19) in the tracking configuration, the lock (1) being provided with a central pillar (55) cooperating with the oblong slot (53).

10. Lock (1) according to one of claims 1 to 9, in which 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 in the holding direction (19).

11. Lock (1) according to one of claims 1 to 10, in which the deadbolt (3) has a plurality of teeth (63) aligned in 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 shape complementarity.

Images