Door lock

Description

[0001] The invention relates to a door lock in accordance with claim 1.

[0002] These kinds of door locks are generally used in domestic doors. Different properties are expected from domestic door locks in different situations. Therefore, the lock should be easy to use in a so-called daytime use position. In practise, it should be then possible to open the door without a key. In other situations the lock should meet sufficient safety requirements, which as a minimum include a bolt that can be deadlocked.

[0003] It is previously known to use in domestic doors a lock, which is provided with a latch bolt spring-loaded to a position protruding from the lock casing, for which latch bolt two different protruding positions may be selected, whereby the choice: of the longer position also involves a deadlocking possibility. The solution is widely used and simple, but might in present conditions appear insufficient as regards its safety qualities. According to another known solution the lock casing is provided with a handle-operated latch bolt for daytime use and with a separate dead bolt, which is forcibly actuated by a key. The solution is more complicated, but does not have essentially better safety qualities than the former solution. According to yet another generally used solution the door is provided in addition to a conventional door lock, with a separate safety lock forcibly actuated by a key and located at a distance from said door lock. This solution is fairly expensive and more difficult to install, when compared with the above solutions.

[0004] The document EP 1 353 028 A discloses a door lock comprising a lock casing with a latch bolt and a slidable deadbolt. The latch bolt is spring-loaded to a position protruding from the lock casing and has two protrusions of different lengths controlled by an auxiliary bolt.

[0005] The document WO 03/078767 A discloses a door lock comprising a lock casing with a latch bolt and a hook bolt. The lock casing comprises a first operating axis arranged for handle actuation and a first follower arrangement mounted thereon, a second operating axis arranged for a turning knob (thumb turn) actuation and a second follower arrangement mounted thereon and a third operating axis arranged for key actuation. The hook bolt may be positively urged to a protruding position and to a retracted position, the lock casing is further provided with activating means, comprising a switching element accessible from the faceplate of the lock casing which operates on an activating piece (latch plate), which is selectively arranged so as to be moved from a first position, in which it prevents the protrusion of the hook bolt by the turning knob to a second position, in which it allows the protrusion of the hook bolt by the turning knob. One end of the activating piece is provided with a restraining member acting on the second follower arrangement and the other end with a counter surface, which is arranged in cooperation with the switching element.

[0006] A purpose of the invention is to provide a novel, improved, especially to domestic doors applicable door lock, in which the aim is to eliminate the shortcomings occurring in the above-mentioned solutions. A purpose is to provide a solution, in which various operating situations and increasing safety requirements are taken into account, but which is, nevertheless, also suitable for simple daytime operation.

[0007] The object of the invention is achieved as disclosed in the appended claim 1, further embodiments of the invention are explained in the other claims. According to the invention the lock casing is also provided with a hook bolt, which may be positively urged to a protruding position and to a retracted position, and with activating means, which are selectively arranged to be moved from a first position, in which they prevent the protrusion of the hook bolt, to a second position, in which they allow the protrusion of the hook bolt, wherein said activating means comprise an activating piece, one end of which is provided with a restraining member acting on the hook bolt and the other end with a counter surface, which is arranged in cooperation with a second follower arrangement mounted on said second operating axis for moving the activating piece from said first position to said second position. Thus, the same lock casing comprises two safety bolts, which are independently of one another selectively movable to their protruding position, which is likely to improve the safety qualities of the lock. Accordingly, the solution makes it possible to accomplish two different safety locking modes with the same lock casing, depending on whether only the latch bolt deadlocked in its outermost protruding position is used alone, or together with the hook bolt. At the same time, the solution is still simple, since no separate latch bolt for daytime use is required. Further, only two operating axes are required in the lock casing.

[0008] The activating piece is preferably spring-loaded towards its first position. In this way it can be ensured that the hook bolt is taken into use separately and intentionally.

[0009] In view of the safety qualities of the lock it is advantageous to provide the lock casing with a deadlocking element for the hook bolt, which element is turnably supported by the lock casing and spring-loaded towards its deadlocking position. Then, the activating piece may be arranged to control the movements of the deadlocking element so that it allows the movement of the deadlocking element to its deadlocking position, while the hook bolt is in its protruding position. ln this way the use of both the hook bolt and its deadlocking position can be activated with the same activating piece.

[0010] Further, the activating piece may preferably be arranged so as to be moved to a third position, in which it is arranged to prevent the turning of the turning knob means mounted on said second operating axis. This is likely to improve the safety qualities of the lock further, as it can be ensured that a burglar intruding into a locked space cannot disengage the locking, and thus the door itself, without a key.

[0011] Said second and third positions of the activating piece are on different sides of said first position. Consequently, the same spring can be used to load the activating piece so as to make it move both to a position enabling the use of the hook bolt and further to a position preventing the turning of the turning knob. On the other hand, the hook bolt may then be preferably arranged to prevent the movement of the activating piece to its said third position, while the hook bolt is in its retracted position, and thus it can be ensured that the lock members do not unintentionally move to their highest safety locking mode.

[0012] In a preferable embodiment the retraction of the latch bolt is arranged so as to be provided by the follower means mounted on the first operating axis. Then, also the movement of the hook bolt to its protruding position may preferably be arranged by said follower means by turning them in an opposite direction with respect to the direction of the retraction of the latch bolt.

[0013] The hook bolt is preferably provided with a force transmission piece turnably supported by it, on which piece said follower means are arranged to act for protruding the hook bolt and on which the latch bolt is arranged to act for retracting the hook bolt. ln this way the latch bolt and the hook bolt may preferably be arranged so as to be retracted inside the lock casing solely by said follower means mounted on the first operating axis, i.e. from one and the same operating axis, which is likely to provide a simpler structure.

[0014] The latch bolt is preferably provided with a force transmission piece turnably supported by it, which force transmission piece is spring-loaded towards a first position, in which it is beyond reach of said first follower means and from where it can be moved to a second position, in which it is in cooperation with said follower means for retracting the bolts. Consequently, the exertion of force with the intention of breaking the lock from the first operating axis remains ineffectual.

[0015] Said force transmission piece is in its said first position preferably arranged to deadlock the latch bolt. In addition, said second follower means mounted on the second operating axis are arranged to control the movements of said force transmission piece, whereby the deadlocking of the latch bolt is independent of handle actuation.

[0016] ln the following, the invention is explained by way of example with reference to the appended schematic drawings, in which

• Figure 1 depicts a door lock according to an embodiment of the invention with the housing of the lock casing for the most part open and the parts of the lock in a so-called daytime use position, while the door is open;
• Figure 2 depicts the lock according to Figure 1 with the latch bolt deadlocked in its outermost protruding position, while the door is closed;
• Figure 3 depicts the lock according to Figure 2 in a situation, in which also the hook bolt is activated and protruded;
• Figure 4 depicts the lock according to Figure 3 after the protrusion of the hook bolt in a situation, in which also both the handle actuation and the turning knob actuation are prevented;
• Figure 5 depicts the lock according to Figure 4 in a situation, in which the lock members are activated for retracting the bolts; and
• Figure 6 depicts the lock according to Figure 5 after the bolts have been retracted and the door has been opened, while the handle is still pressed down.

[0017] In the drawings the reference number 1 refers to a lock casing in a door lock comprising a housing 1a and a front plate 2. The door itself is not shown. For handle actuation the lock casing is provided with a first operating axis 3, on which a follower 4 is mounted (for the sake of clarity the handle itself is not shown) and a second operating axis 5, on which a follower arrangement 6 is mounted for key actuation and turning knob actuation (neither the cylinder housing nor the turning knob are shown). The follower arrangement 6 comprises, in a manner known as such, two mutually independent turnable followers 6a and 6b, whereby one of the followers, depending on whether the door is a right-hand door or a left-hand door, is turnable by means of the door knob on the inside of the door and the other follower is correspondingly turnable by a key via the cylinder housing on the outside of the door.

[0018] The lock casing 1 is provided with a latch bolt 7, which a spring 23 tends to push towards a protruding position and which has two protruding positions of different lengths. The choice between these two positions is made, in a way known as such, from the front plate's 2 side by a turnable selector member (not shown in detail) and in addition, the operation of the latch bolt 7 is in a manner known as such controlled by an auxiliary bolt 8. Figure 1 illustrates the daytime use of the door lock after the door has been opened and a restraining member 9 in conjunction with the auxiliary bolt 8 has been moved by the selector member to a position, which in all situations and independently of the auxiliary bolt 8 prevents the movement of the latch bolt 7 to its outermost protruding position.

[0019] For the retraction of the latch bolt 7 a force transmission piece 10 is turnably supported by it, on the pin 10a of which piece the follower 4 acts. A spring 11 acts on the force transmission piece 10 tending to turn it anti-clockwise in the figures. A stationary pin 12 in the lock casing controls the movements of the latch bolt 7.

[0020] In the situation according to Figure 2 the selector member is moved to a position, in which it allows the latch bolt 7 to move to its outermost protruding position. In this case the door is closed, whereby the auxiliary bolt 8 lies against a striker plate (not shown) in the doorframe only partly protruded. When the door is opened, the auxiliary bolt 8 is urged to its outer position according to Figure 1 and simultaneously presses the restraining member 9 to the position shown in Figure 1. Then the latch bolt 7 remains in its inner protruding position according to Figure 1, whereby the door can be pressed closed, if required, without using the handle. All this is previously known technology.

[0021] In the situation according to Figure 2 the door is closed and the force transmission piece 10 is, urged by the spring 11, in a position, in which it is beyond reach of the follower 4, whereby the force transmission connection from the operating axis 3 to the latch bolt 7 is cut. In this position the force transmission piece 10 provides also deadlocking of the latch bolt 7 via the stationary pin 12 of the lock casing. This corresponds to the lighter safety locking mode of the door lock. When the aim in this situation is to open the door and retract the latch bolt 7, the deadlocking of the latch bolt needs to be first disengaged and the force transmission connection to the latch bolt 7 restored. For this purpose the lock casing is provided with a turnably supported activating element 18, which may be pressed against the force of the spring 11 by either follower, 6a or 6b, of the follower means 6 so that it moves the force transmission piece 10 to a position, in which the latch bolt 7 can by means of the follower 4 be retracted inside the lock casing (cf. Figures 3 and 5).

[0022] According to the invention it is also possible to select a heavier safety locking mode with other kind of safety qualities. For this purpose the lock casing 1 also includes a hook bolt 13, known per se, comprising parts 13a and 13b turnably supported by one another by means of a pin 14. In addition, a force transmission piece 15 is turnably supported by the pin 14. Further, the lock casing is for the activation of the use of the hook bolt 13 provided with an activating piece 16, which can be moved, urged by a spring 17, parallel to the front plate 2 in the lock casing. The operation of these components will be explained in the following with special reference to Figures 3 - 6, which depict the different phases of the operation related to the highest safety locking mode of the door lock.

[0023] The activating piece 16 is provided with a protrusion 16a, through which a spring 17 presses it upwards in the figures. ln the operating mode shown in Figures 1 and 2 the protrusion 16a acts also on the part 13b of the hook bolt and prevents the movement of the hook bolt 13 to its protruding position. The activating piece 16 is also provided with counter surfaces 16b (cf. Figure 1), which are in cooperation with the follower arrangement 6 so that the activating piece 16 may by either follower, 6a or 6b, be pressed against the force of the spring 17, as shown in Figure 3, and thus release the hook bolt 13 to be taken into use.

[0024] With reference to Figure 3, the activation of the use of the hook bolt 13 is performed by turning the follower 4 of the first operating axis 3 in a direction opposite of the direction of normal handle operation, i.e. anti-clockwise in the figures, whereby it presses the hook bolt 13 to its protruding position according to Figure 3 by means of the force transmission piece 15 turnably supported by the pin 14 of the hook bolt. For this purpose the force transmission piece 15 is supported by a stationary pin 19 of the lock casing. The control of the movements of the hook bolt 13 is carried out in a way known as such by utilising the pin 14 and a guide groove 1b in the lock casing, as well as a guide groove 13b' in the hook bolt's part 13b and a pin 20 in the lock casing.

[0025] The lock casing is also provided with a deadlocking element 21 for the hook bolt turnably supported by the pin 20 of the lock casing, which element is provided with a pin 21a and urged by a spring 22 towards the locking position of the deadlocking element 21. ln the situation according to Figures 1 and 2 the guide surface 16c in the activating piece 16 prevents, via the pin 21a, the movement of the deadlocking element 21 to its locking position. On the other hand, the hook bolt's part 13b acts simultaneously on the protrusion 16a and prevents the movement of the activating piece 16 upwards in the figures.

[0026] After the hook bolt 13 has been moved out and the follower means 6 turned from the position according to Figure 3 back to their normal position, the activating element 16 is allowed, urged by the spring 17, to move to the position according to Figure 4, in which it is located higher up than in the positions according to Figures 1 and 2. Then, in the situation of Figure 4, the deadlocking element 21 of the hook bolt 13 is first moved, urged by a spring 22, to its deadlocking position according to Figure 4, in which its counter surface 21b acts on the pin 14 of the hook bolt. Moreover, the activating piece 16 is provided with an acting member 16d, by means of which the turning of the non-shown turning knob mounted on the operating axis 5 is prevented. The prevention may, in principle, occur directly or via a movable restraining member. The arrangement is, however, such that the key actuation may in any case provide, by means of the follower arrangement 6, the movement of the activating piece 16, in a way shown in Figure 5, back to the position, which corresponds to the position of Figure 3 and which enables the retraction of the hook bolt 13 and enables the operation of the turning knob again. At the same time the follower means 6 press the activating element 18 to a position, in which the deadlocking of the latch bolt 7 is disengaged and the force transmission from the follower 4 is engaged.

[0027] Figure 6 depicts the next phase, in which the bolts 7 and 13 are retracted and the door is open. Thus, when the follower 4 is turned clockwise, it acts on the pin 10a of the force transmission piece 10 and retracts the latch bolt 7. The latch bolt is provided with a pin 7a, which then hits the force transmission piece 15 supported by the hook bolt 13 and retracts thus also the hook bolt 13 inside. Subsequently, after the follower means 6 have again been turned back to their normal position, the hook bolt's part 13b prevents again the movement of the activating piece 16 to its activating position (cf. Figure 3). Similarly, the protrusion 16a of the activating piece prevents the movement of the hook bolt 13 till the activating piece 16 is reactivated by the follower means 6 to allow the movement of the hook bolt 13 (cf. Figure 3).

[0028] Conclusively, the door lock according to the invention has three different operating modes. First, there is a mode for daytime use, in which only the latch bolt with its shorter protruding position is in use, whereby the door can be opened without a key. From this mode it is possible via the front plate to move, by turning a separate selector member, to a safety locking mode, in which the latch bolt can be moved to its outer protruding position, whereby it is also deadlocked. Then, the lock can be opened by a key from the outside of the door and by the turning knob from the inside of the door. From this mode it is possible, if so required, to move further to a secured safety locking mode, in which the hook bolt can be taken into use by the follower means mounted on the second operating axis by moving the special activating piece and in addition, to make the turning knob on the inside of the door inoperative. ln this situation the locking can always be disengaged from the outside of the door by a key. In order to make the disengagement of the locking possible also from the inside of the door, an additional key actuation independent of the turning of the turning knob is required.

[0029] The invention is not limited to the shown embodiments, but several variations are conceivable within the scope of the appended claims.

Claims

1. A door lock comprising a lock casing (1) with a first operating axis (3) arranged for handle actuation and a first follower arrangement (4) mounted thereon, a second operating axis (5) arranged for key and/or turning knob actuation and a second follower arrangement (6) mounted thereon, a latch bolt (7) spring loaded to a position protruding from the lock casing, which latch bolt has two selectable protrusion positions of different lengths, an auxiliary bolt (8) for controlling the protrusion of the latch bolt (7), and a hook bolt (13), which may be positively urged to a protruding position and to a retracted position, the lock casing further being provided with activating means (16), which are selectively arranged so as to be moved from a first position, in which they prevent the protrusion of the hook bolt (13), to a second position in which they allow the protrusion of the hook bolt (13), wherein said activating means comprise an activating piece (16), one end of which is provided with a restraining member (16a) acting on the hook bolt (13) and the other end with a counter surface (16b), which is arranged in cooperation with the second follower arrangement (6) mounted on said second operating axis (5) for moving the activating piece (16) from said first position to said second position.

2. A door lock according to claim 1, characterised in that the activating piece (16) is spring-loaded (17) towards its first position.

3. A door lock according to claim 1 or 2. characterised in that the lock casing (1) is provided with a deadlocking element (21) for the hook bolt (13), which element is turnably supported by the lock casing and spring-loaded (22) towards its deadlocking position, and that the activating piece (16) is arranged to control the movements of the deadlocking element (21) so that it allows the movement of the deadlocking element (21) to its deadlocking position, while the hook bolt (13) is in its protruding position.

4. A door lock according to anyone of the preceding claims, characterised in that the activating piece (16) is movable to a third position, in which it is arranged to prevent the turning of the turning knob means mounted on said second operating axis (5).

5. A door lock according to claim 4, characterised in that said second and third positions of the activating piece (16) are on different sides of said first position, and that the hook bolt (13; 13b) is arranged to prevent the movement of the activating piece (16) to its said third position, while the hook bolt (13) is in its retracted position.

6. A door lock according to anyone of the preceding claims, characterised in that the retraction of the latch bolt (7) is arranged to be accomplished by said follower means (4) mounted on the first operating axis (3), and that the movement of the hook bolt (13) to its protruding position is arranged to be accomplished by said follower means (4) by turning them in an opposite direction with respect to the direction of the retraction of the latch bolt.

7. A door lock according to claim 6, characterised in that the hook bolt (13) is provided with a force transmission piece (15) turnably supported by it, on which piece said follower means (4) are arranged to act for protruding the hook bolt (13) and on which the latch bolt (7) is arranged to act for retracting the hook bolt (13).

8. A door lock according to anyone of the preceding claims, characterised in that the latch bolt (7) and the hook bolt (13) are arranged to be retracted inside the lock casing (1) only by said follower means (4) mounted on the first operating axis (3), and that the larch bolt (7) is provided with a force transmission piece (10) turnably supported by it.

9. A door lock according to claim 8, characterised in that said force transmission piece (10) is spring-loaded (11) towards a first position, in which it is beyond reach of said first follower means (4) and from which it can be moved to a second position, in which it is in cooperation with said follower means (4) for retracting the bolts (7, 13).

10. A door lock according to claim 9, characterised in that said force transmission piece (10) is in its said first position arranged to deadlock the latch bolt (7).

11. A door lock according to anyone of claims 8 - 10, characterised in that said second follower means (6) mounted on the second operating axis (5) are arranged to control the movements of said force transmission piece (10).

Ansprüche

1. Türschloss, umfassend ein Schlossgehäuse (1) mit einer ersten Betriebsachse (3), die zur Griffbetätigung angeordnet ist, und einer daran angebrachten ersten Zuhaltungsbaugruppe (4), einer zweiten Betriebsachse (5), die zur Schlüssel- und/oder Drehknopfbetätigung angeordnet ist, und einer daran angebrachten zweiten Zuhaltungsbaugruppe (6), einem Fallenriegel (7), der zu einer Position hin federbelastet ist, die von dem Schlossgehäuse vorsteht, wobei der Fallenriegel zwei wählbare vorstehende Positionen mit unterschiedlicher Länge aufweist, einem Hilfsriegel (8) zum Regeln des Vorstands des Fallenriegels (7) und einem Hakenriegel (13), der zwangläufig in eine vorstehende Position und in eine eingezogene Position gedrängt sein kann, wobei das Schlossgehäuse ferner mit Betätigungsmitteln (16) versehen ist, die wahlweise zu ihrer Bewegung aus einer ersten Position, in der sie das Vorstehen des Hakenriegels (13) verhindern, in eine zweite Position, in der sie das Vorstehen des Hakenriegels (13) ermöglichen, angeordnet sind, wobei die Betätigungsmittel ein Betätigungsstück (16) umfassen, das an einem seiner Enden mit einem Beschränkungsglied (16a), das auf den Hakenriegel (13) einwirkt, und am anderen Ende mit einer Gegenfläche (16b) versehen ist, die in Zusammenwirkung mit der zweiten Zuhaltungsbaugruppe (6), die auf der zweiten Betriebsachse (5) angebracht ist, zum Verschieben des Betätigungsstücks (16) aus der ersten Position in die zweite Position angeordnet ist.

2. Türschloss nach Anspruch 1, dadurch gekennzeichnet, dass das Betätigungsstück (16) zur ersten Position hin federbelastet (17) ist.

3. Türschloss nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das Schlossgehäuse (1) mit einem Verriegelungselement (21) für den Hakenriegel (13) versehen ist, wobei das Element drehbar von dem Schlossgehäuse gestützt ist und zu seiner Verriegelungsposition hin federbelastet (22) ist, und dass das Betätigungsstück (16) derart zum Regeln der Bewegungen des Verriegelungselements (21) angeordnet ist, dass es die Bewegung des Verriegelungselements (21) in seine Verriegelungsposition ermöglicht, während der Hakenriegel (13) in seiner vorstehenden Position ist.

4. Türschloss nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Betätigungsstück (16) in eine dritte Position bewegbar ist, in der es zum Verhindern des Drehens der Drehknopfmittel, die auf der zweiten Betriebsachse (5) angebracht sind, angeordnet ist.

5. Türschloss nach Anspruch 4, dadurch gekennzeichnet, dass sich die zweite und die dritte Position des Betätigungsstücks (16) auf verschiedenen Seiten von der ersten Position befinden, und dass der Hakenriegel (13; 13b) zum Verhindern der Bewegung des Betätigungsstücks (16) in seine dritte Position angeordnet ist, während der Hakenriegel (13) in seiner eingezogenen Position ist.

6. Türschloss nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Einziehen des Fallenriegels (7) derart eingerichtet ist, dass es durch die Zuhaltungsmittel (4) durchgeführt wird, die auf der ersten Betriebsachse (3) angebracht sind, und dass die Bewegung des Hakenriegels (13) in seine vorstehende Position derart eingerichtet ist, dass sie durch die Zuhaltungsmittel (4) durch Drehen derselben in eine Gegenrichtung bezüglich der Einziehungsrichtung des Fallenriegels durchgeführt wird.

7. Türschloss nach Anspruch 6, dadurch gekennzeichnet, dass der Hakenriegel (13) mit einem Kraftübertragungsstück (15) versehen ist, das drehbar davon gestützt ist, wobei auf dem Stück die Zuhaltungsmittel (4) zum Bewirken des Vorstellens des Hakenriegels (13) angeordnet sind, und wobei darauf der Fallenriegel (7) zum Bewirken des Einziehens des Hakenriegels (13) angeordnet ist.

8. Türschloss nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Fallenriegel (7) und der Hakenriegel (13) dazu angeordnet sind, nur durch die Zuhaltungsmittel (4) ins Innere des Schlossgehäuses (1) eingezogen zu werden, die auf der ersten Betriebsachse (3) angeordnet sind, und dass der Fallenriegel (7) mit einem Kraftübertragungsstück (10) versehen ist, das drehbar davon gestützt ist.

9. Türschloss nach Anspruch 8, dadurch gekennzeichnet, dass das Kraftübertragungsstück (10) zu einer ersten Position hin federbelastet (11) ist, in der es außerhalb der Reichweite der ersten Zuhaltungsmittel (4) ist, und aus der es in eine zweite Position bewegt werden kann, in der es in Zusammenwirkung mit den Zuhaltungsmitteln (4) zum Einziehen der Riegel (7, 13) steht.

10. Türschloss nach Anspruch 9, dadurch gekennzeichnet, dass das Kraftübertragungsstück (10) in seiner ersten Position zum Verriegeln des Fallenriegels (7) angeordnet ist.

11. Türschloss nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass die zweiten Zuhaltungsmittel (6), die auf der zweiten Betriebsachse (5) angebracht sind, zum Regeln der Bewegungen des Kraftübertragungsstücks (10) angeordnet sind.

Revendications

1. Serrure de porte comprenant un boîtier de serrure (1) avec un premier axe fonctionnel (3) conçu pour l'actionnement d'une poignée, ainsi qu'un premier agencement de fouillot (4) monté sur celui-ci, un deuxième axe fonctionnel (5) conçu pour l'actionnement d'une clé et/ou d'un bouton rotatif, et un deuxième agencement de fouillot (6) monté sur celui-ci, un pêne demi-tour (7) contraint par ressort dans une position faisant saillie hors du boîtier de serrure, lequel pêne demi-tour possède deux positions de saillie au choix, de différentes longueurs, un pêne auxiliaire (8) pour le contrôle de la saillie du pêne demi-tour (7), et un pêne en crochet (13), qui peut être forcé de façon positive dans une position saillante et dans une position rétractée, le boîtier de serrure étant en outre pourvu de moyens d'actionnement (16) agencés sélectivement de manière à être déplacés d'une première position, dans laquelle ils empêchent le pêne en crochet (13) de faire saillie, vers une deuxième position, dans laquelle ils permettent au pêne en crochet (13) de faire saillie, lesdits moyens d'actionnement comprenant une pièce d'actionnement (16), dont une extrémité est pourvue d'un élément de retenue (16a) agissant sur le pêne en crochet (13), et l'autre extrémité est pourvue d'une contre-surface (16b) agencée en coopération avec le deuxième agencement de fouillot (6) monté sur ledit deuxième axe fonctionnel (5) pour déplacer la pièce d'actionnement (16) de ladite première position vers ladite deuxième position.

2. Serrure de porte selon la revendication 1, caractérisée en ce que la pièce d'actionnement (16) est contrainte par ressort (17) vers sa première position.

3. Serrure de porte selon la revendication 1 ou 2, caractérisée en ce que le boîtier de serrure (1) est pourvu d'un élément de blocage (21) pour le pêne en crochet (13), lequel élément est soutenu de façon rotative par le boîtier de serrure et contraint par ressort (22) vers sa position de blocage, et en ce que la pièce d'actionnement (16) est agencée pour contrôler les mouvements de l'élément de blocage (21), de manière à permettre le mouvement de l'élément de blocage (21) vers sa position de blocage, tandis que le pêne en crochet (13) se trouve dans sa position saillante.

4. Serrure de porte selon l'une quelconque des revendications précédentes, caractérisée en ce que la pièce d'actionnement (16) peut être déplacée vers une troisième position, dans laquelle elle est agencée pour empêcher la rotation du bouton rotatif monté sur ledit deuxième axe fonctionnel (5).

5. Serrure de porte selon la revendication 4, caractérisée en ce que les deuxième et troisième positions de la pièce d'actionnement (16) se trouvent sur des côtés différents de ladite première position, et en ce que le pêne en crochet (13 ; 13b) est agencé pour empêcher le mouvement de la pièce d'actionnement (16) vers sa dite troisième position, tandis que le pêne en crochet (13) se trouve dans sa position rétractée.

6. Serrure de porte selon l'une quelconque des revendications précédentes, caractérisée en ce que la rétraction du pêne demi-tour (7) est agencée pour être accomplie par lesdits moyens de fouillot (4) montés sur le premier axe fonctionnel (3), et en ce que le mouvement du pêne en crochet (13) vers sa position saillante est agencé pour être accompli par lesdits moyens de fouillot (4), par une rotation de ceux-ci dans une direction opposée par rapport à la direction de la rétraction du pêne demi-tour.

7. Serrure de porte selon la revendication 6, caractérisée en ce que le pêne en crochet (13) est pourvu d'une pièce de transmission de force (15) soutenue de façon rotative dans celui-ci, pièce sur laquelle sont agencés les moyens de fouillot (4) pour agir de manière à faire saillir le pêne en crochet (13), et sur laquelle est agencé le pêne demi-tour (7) pour agir de manière à rétracter le pêne en crochet (13).

8. Serrure de porte selon l'une quelconque des revendications précédentes, caractérisée en ce que le pêne demi-tour (7) et le pêne en crochet (13) sont agencés pour être rétractés à l'intérieur du boîtier de serrure (1) uniquement par les moyens de fouillot (4) montés sur le premier axe fonctionnel (3), et en ce que le pêne demi-tour (7) est pourvu d'une pièce de transmission de force (10) soutenue de façon rotative par celui-ci.

9. Serrure de porte selon la revendication 8, caractérisée en ce que ladite pièce de transmission de force (10) est contrainte par ressort (11) vers une première position, dans laquelle elle se trouve hors d'atteinte par rapport auxdits premiers moyens de fouillot (4), et à partir de laquelle il peut être déplacé vers une deuxième position, dans laquelle elle se trouve en coopération avec lesdits moyens de fouillot (4) pour rétracter les pênes (7, 13).

10. Serrure de porte selon la revendication 9, caractérisée en ce que ladite pièce de transmission de force (10) se trouve dans sa dite première position agencée pour bloquer le pêne demi-tour (7).

11. Serrure de porte selon l'une quelconque des revendications 8 à 10, caractérisée en ce que lesdits moyens de fouillot (6) montés sur ledit deuxième axe fonctionnel (5) sont agencés pour contrôler les mouvements de ladite pièce de transmission de force (10).

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