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EP1561885B1 - Protection device for a tumbler of a door lock - Google Patents

Protection device for a tumbler of a door lock Download PDF

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Publication number
EP1561885B1
EP1561885B1 EP20050002343 EP05002343A EP1561885B1 EP 1561885 B1 EP1561885 B1 EP 1561885B1 EP 20050002343 EP20050002343 EP 20050002343 EP 05002343 A EP05002343 A EP 05002343A EP 1561885 B1 EP1561885 B1 EP 1561885B1
Authority
EP
European Patent Office
Prior art keywords
protection plate
lock according
groove
tumbler
bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20050002343
Other languages
German (de)
French (fr)
Other versions
EP1561885A1 (en
Inventor
Alain Lartisien
Thierry Farcy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bricard SAS
Original Assignee
Bricard SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bricard SAS filed Critical Bricard SAS
Publication of EP1561885A1 publication Critical patent/EP1561885A1/en
Application granted granted Critical
Publication of EP1561885B1 publication Critical patent/EP1561885B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
    • E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
    • E05B17/2092—Means responsive to tampering or attack providing additional locking
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/0017—Locks with sliding bolt without provision for latching

Definitions

  • the present invention relates to a door lock equipped with a device for protecting a groove of this lock.
  • a lock is for example known documents EP 1199 427A or EP 651 116 A .
  • a burglar wishing to enter a room starts by fracturing the barrel to extract it from the trunk of the door lock. Once this task has been completed, the burglar has access to the internal organs of the lock and can therefore easily unlock the bolt previously housed in the keeper fixed in the door jamb to protect. For this, the burglar raises the groove whose teeth cooperate with the teeth presented by the tail of the bolt. The bolt is no longer locked in translation and the burglar can place it in its rest position.
  • the present invention aims to solve the problem mentioned above, and consists of a door lock comprising a safe adapted to be traversed by a barrel provided with a movable bit rotating, a locking bolt that can cooperate with said bit and having a tail having teeth, a groove provided to be disposed on one side of said tail and provided with a stop element, a first elastic return means putting said groove in engagement with said teeth,
  • this lock being remarkable in that it comprises a protection plate positioned on the other side of said tail and characterized in that it is designed so as to have at least one suitable protuberance, under the effect of at least one second resilient return means, bearing against said abutment element, this second elastic return means being suitable, if said protrusion is disengaged from said abutment element, to forcing said shielding plate to pivot about an axis to position said protuberance on the path of said tail.
  • a protection device is therefore active since it is able to effectively counter such an attempted break-in.
  • the second elastic return means is made using a torsion spring.
  • the latter has a branch designed to bear against the protection plate.
  • a groove is formed in the upper edge of the protection plate to receive the branch of the torsion spring. It should be understood that a side compression spring could be used in place of such a torsion spring.
  • the associated abutment element has a substantially flat contact surface.
  • a shoulder is advantageously formed in the groove.
  • the protrusion of the protective plate comprises a tooth extended by a lug provided to be inserted between the shoulder and the stop element formed in the groove.
  • the protection plate can not rotate in one direction or another.
  • the protection plate comprises a substantially oblong slot through which the axis around which said protection plate can pivot.
  • a clearance is preferably provided at the rear of the tail of the locking bolt to allow the pivoting of the protection plate.
  • a door lock 1 as shown in FIG. figure 1 , comprises a box 2 made with two flanges 3 assembled to one another. This box 2 is attached to a headrest 4, and contains the parts well known to those skilled in the art usually used for locking and unlocking a locking bolt 5 extended by a tail 9 provided with teeth 17.
  • each flange 3 comprises, in the lower part, a central opening 6 adapted to the section of a cylinder 7, the latter having a first portion 8 and a second portion (not shown) separated from one another by a medial bit 10 rotating in rotation.
  • the bit 10 is housed in said trunk 2, and the first part 8 and the second part of the barrel 7 protrude respectively on one side and the other of said trunk 2.
  • the bit 10 is intended to cooperate with a groove 11 when it is rotated by means of a key 40 inserted into the barrel 7.
  • this groove 11 is constituted by a plate having an inner face 12 disposed on one side of the tail 9 of the bolt 5.
  • This groove 11 has an oblong slot 13 traversed by a transverse axis 14 secured to the box 2.
  • the groove 11 comprises, on the one hand, a shoulder 15 projecting into which is hollowed a recess 16 to form a housing adapted to cooperate with the teeth 17 of the tail 9 of the bolt 5, and on the other hand, a stop element 18, separated from the shoulder 15, and having a substantially flat contact surface 19.
  • This shoulder 15 is surmounted by a stud 20 on which is centered a first end of a compression spring 21, the latter also having a second end bearing against a fixed element of the door lock 1.
  • a protective plate 22 provided with an inner face 24 is attached to the groove 11 on the other side of the shank 9 of the bolt 5.
  • This protective plate 22 has an oblong slot 25 through which the shaft 14 passes. transversely integral with the trunk 2.
  • the protection plate 22 has a protuberance 26 comprising a tooth 27 extended by a lug 28.
  • a groove 29 parallel to the tail 9 of the bolt 5 is hollowed at the top of the protrusion 26 and constitutes a housing adapted to receive a first branch 30 of a torsion spring 31 placed around a fixed element 32 secured to the door lock 1.
  • the second limb 33 of this torsion spring 31 is provided to abut against the return 35 of one of the two flanges 3.
  • This fixed element 32 overhangs the groove 11 and the protection plate 22, and is offset by compared to these.
  • the groove 11 and the protection plate 22 are returned, respectively by the compression spring 21 and the torsion spring 31, to the tail 9 of the bolt 5.
  • one of the teeth 17 of the tail 9 of the bolt 5 is housed in the recess 16 presented by the shoulder 15 of the groove 11 so as to lock the bolt 5 in translation
  • the tooth 27 of the protrusion 26 rests on the tail 9 of the bolt 5
  • the lug 28 of the protrusion 26 is inserted between the shoulder 15 and the abutment element 18 formed in the groove 11. More specifically, the lug 28 is provided to abut against the substantially flat contact surface 19 of the abutment element 18.
  • the bit 10 housed in the trunk 2 is rotated, or in a clockwise direction, or in the trigonometric direction, and simultaneously comes into contact with the groove 11 and the protection plate 22.
  • the bit 10 exerts stress in the lower part of the groove 11 and the protection plate 22, and causes the translational movement upwards thereof against respectively the compression spring 21 and the torsion spring 31.
  • the groove 11 and the protection plate 22 remain motionless relative to each other, and it follows that the lug 28 remains in abutment against the contact surface 19 of the abutment member 18.

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  • Lock And Its Accessories (AREA)

Description

La présente invention se rapporte à une serrure de porte équipée d'un dispositif de protection d'une gorge de cette serrure. Une telle serrure est par exemple connue des documents EP 1199 427A ou EP 651 116 A .The present invention relates to a door lock equipped with a device for protecting a groove of this lock. Such a lock is for example known documents EP 1199 427A or EP 651 116 A .

Bien souvent, un cambrioleur désirant pénétrer à l'intérieur d'un local commence par fracturer le barillet afin de l'extraire du coffre de la serrure de porte. Une fois que cette tâche a été accomplie, le cambrioleur a accès aux organes internes de la serrure et peut donc facilement procéder au déverrouillage du pêne jusqu'alors logé dans la gâche fixée dans le chambranle de la porte à protéger. Pour cela, le cambrioleur soulève la gorge dont les dents coopèrent avec les dents présentées par la queue du pêne. Le pêne n'est donc plus bloqué en translation et le cambrioleur peut le placer dans sa position de repos.Often, a burglar wishing to enter a room starts by fracturing the barrel to extract it from the trunk of the door lock. Once this task has been completed, the burglar has access to the internal organs of the lock and can therefore easily unlock the bolt previously housed in the keeper fixed in the door jamb to protect. For this, the burglar raises the groove whose teeth cooperate with the teeth presented by the tail of the bolt. The bolt is no longer locked in translation and the burglar can place it in its rest position.

Pour lutter contre de telles effractions, il est déjà connu de positionner la queue du pêne entre deux moitiés distinctes constitutives d'une gorge mobile en translation verticale- Par conséquent, le cambrioleur sera gêné dans sa tentative d'effraction puisqu'il devra nécessairement soulever les deux moitiés simultanément s'il veut libérer le pêne. Néanmoins, si un tel dispositif permet effectivement de retarder l'ouverture de la porte, il ne constitue aucunement un dispositif de protection actif apte à stopper une effraction en cours.To combat such break-ins, it is already known to position the tail of the bolt between two separate halves constituting a movable groove in vertical translation- Therefore, the burglar will be embarrassed in his attempted break-in because it will necessarily raise both halves simultaneously if he wants to release the bolt. However, if such a device actually allows to delay the opening of the door, it is not an active protection device capable of stopping a break in progress.

La présente invention a pour but de résoudre le problème évoqué précédemment, et consiste pour cela en une serrure de porte, comprenant un coffre apte à être traversé par un barillet pourvu d'un panneton mobile en rotation, un pêne de condamnation pouvant coopérer avec ledit panneton et muni d'une queue comportant des dents, une gorge prévue pour être disposée d'un côté de ladite queue et munie d'un élément de butée, un premier moyen de rappel élastique mettant ladite gorge en prise avec lesdites dents, cette serrure étant remarquable en ce qu'elle comprend une plaque de protection positionnée de l'autre côté de ladite queue et caractérisée en ce qu'elle est conçue de façon à présenter au moins une protubérance apte, sous l'effet d'au moins un deuxième moyen de rappel élastique, à venir en appui contre ledit élément de butée, ce deuxième moyen de rappel élastique étant apte, si ladite protubérance est désengagée dudit élément de butée, à forcer ladite de plaque de protection à pivoter autour d'un axe afin de positionner ladite protubérance sur la trajectoire de ladite queue.The present invention aims to solve the problem mentioned above, and consists of a door lock comprising a safe adapted to be traversed by a barrel provided with a movable bit rotating, a locking bolt that can cooperate with said bit and having a tail having teeth, a groove provided to be disposed on one side of said tail and provided with a stop element, a first elastic return means putting said groove in engagement with said teeth, this lock being remarkable in that it comprises a protection plate positioned on the other side of said tail and characterized in that it is designed so as to have at least one suitable protuberance, under the effect of at least one second resilient return means, bearing against said abutment element, this second elastic return means being suitable, if said protrusion is disengaged from said abutment element, to forcing said shielding plate to pivot about an axis to position said protuberance on the path of said tail.

Ainsi, au cours d'une tentative d'effraction, si le cambrioleur désaccouple la protubérance de son élément de butée associé, la plaque de protection sera amenée à pivoter autour d'un axe de façon à ce que la protubérance interdise tout retour en arrière du pêne de condamnation. Un dispositif de protection selon l'invention est donc actif puisqu'il est apte à contrer efficacement une telle tentative d'effraction.Thus, during an attempted break-in, if the burglar uncouples the protuberance of its associated abutment member, the protection plate will be pivoted about an axis so that the protuberance prohibits any return back of the locking bolt. A protection device according to the invention is therefore active since it is able to effectively counter such an attempted break-in.

Selon un mode de réalisation préféré, le deuxième moyen de rappel élastique est réalisé à l'aide d'un ressort de torsion.According to a preferred embodiment, the second elastic return means is made using a torsion spring.

Avantageusement, ce dernier présente une branche conçue pour venir en appui contre la plaque de protection.Advantageously, the latter has a branch designed to bear against the protection plate.

Avantageusement encore, une rainure est ménagée en bordure supérieure de la plaque de protection afin de recevoir la branche du ressort de torsion. Il doit être bien compris qu'un ressort de compression latéral pourrait être employé à la place d'un tel ressort de torsion.Advantageously, a groove is formed in the upper edge of the protection plate to receive the branch of the torsion spring. It should be understood that a side compression spring could be used in place of such a torsion spring.

Préférentiellement, l'élément de butée associé présente une surface de contact sensiblement plane. De plus, un épaulement est avantageusement ménagé dans la gorge.Preferably, the associated abutment element has a substantially flat contact surface. In addition, a shoulder is advantageously formed in the groove.

Selon une variante de réalisation préférée de l'invention, la protubérance de la plaque de protection comprend une dent prolongée par un ergot prévu pour être inséré entre l'épaulement et l'élément de butée ménagés dans la gorge. Ainsi, en fonctionnement normal, la plaque de protection ne peut pivoter ni dans un sens ni dans un autre.According to a preferred embodiment of the invention, the protrusion of the protective plate comprises a tooth extended by a lug provided to be inserted between the shoulder and the stop element formed in the groove. Thus, in normal operation, the protection plate can not rotate in one direction or another.

Préférentiellement encore, la plaque de protection comporte une lumière sensiblement oblongue traversée par l'axe autour duquel ladite plaque de protection peut pivoter.Also preferably, the protection plate comprises a substantially oblong slot through which the axis around which said protection plate can pivot.

De plus, un dégagement est de préférence ménagé à l'arrière de la queue du pêne de condamnation pour permettre le pivotement de la plaque de protection.In addition, a clearance is preferably provided at the rear of the tail of the locking bolt to allow the pivoting of the protection plate.

L'invention sera mieux comprise à l'aide de la description détaillée qui est exposée ci-dessous en regard du dessin annexé dans lequel :

  • La figure 1 est une vue en perspective tronquée d'une serrure de porte équipée d'un dispositif de protection selon un mode de réalisation préféré de l'invention.
  • La figure 2 est une vue à échelle agrandie de la face interne de la plaque de protection de la serrure de porte représentée à la figure 1.
  • La figure 3 est une vue à échelle agrandie de la face interne de la gorge de la serrure de porte représentée à la figure 1.
  • Les figures 4 et 5 sont des vues avant et arrière d'un ensemble comprenant le pêne de condamnation sur lequel sont rapportées la gorge et la plaque de protection.
  • La figure 6 est une vue en perspective de l'ensemble représenté aux figures 4 et 5, lorsque seule la plaque de protection est soulevée.
  • La figure 7 est une vue en perspective de l'ensemble représenté aux figures 4 et 5, lorsque seule la gorge est soulevée.
  • La figure 8 est une vue en perspective de l'ensemble représenté aux figures 4 et 5, au cours du pivotement de la plaque de protection.
  • La figure 9 est une vue en perspective de l'ensemble représenté aux figures 4 et 5, après que la plaque de protection a totalement pivoté.
The invention will be better understood with the aid of the detailed description which is set out below with reference to the appended drawing in which:
  • The figure 1 is a truncated perspective view of a door lock equipped with a protection device according to a preferred embodiment of the invention.
  • The figure 2 is an enlarged view of the inside face of the door lock protector plate shown in FIG. figure 1 .
  • The figure 3 is an enlarged view of the inner face of the groove of the door lock shown in FIG. figure 1 .
  • The Figures 4 and 5 are front and rear views of an assembly comprising the locking bolt on which are reported the groove and the protective plate.
  • The figure 6 is a perspective view of the assembly shown in Figures 4 and 5 , when only the protection plate is raised.
  • The figure 7 is a perspective view of the assembly shown in Figures 4 and 5 when only the throat is raised.
  • The figure 8 is a perspective view of the assembly shown in Figures 4 and 5 , during pivoting of the protection plate.
  • The figure 9 is a perspective view of the assembly shown in Figures 4 and 5 , after the protection plate has completely rotated.

Une serrure de porte 1 selon l'invention, telle que représentée à la figure 1, comporte un coffre 2 réalisé à l'aide de deux flasques 3 assemblés l'un à l'autre. Ce coffre 2 est rattaché à une têtière 4, et renferme les pièces bien connues de l'homme du métier habituellement utilisées pour assurer le verrouillage et le déverrouillage d'un pêne 5 de condamnation prolongé par une queue 9 pourvue de dents 17.A door lock 1 according to the invention, as shown in FIG. figure 1 , comprises a box 2 made with two flanges 3 assembled to one another. This box 2 is attached to a headrest 4, and contains the parts well known to those skilled in the art usually used for locking and unlocking a locking bolt 5 extended by a tail 9 provided with teeth 17.

Plus précisément, chaque flasque 3 comporte, en partie basse, une ouverture centrale 6 adaptée à la section d'un barillet 7, ce dernier présentant une première partie 8 et une seconde partie (non représentée) séparées l'une de l'autre par un panneton 10 médian mobile en rotation.More specifically, each flange 3 comprises, in the lower part, a central opening 6 adapted to the section of a cylinder 7, the latter having a first portion 8 and a second portion (not shown) separated from one another by a medial bit 10 rotating in rotation.

Une fois que le barillet 7 est correctement engagé dans le coffre 2, le panneton 10 est logé dans ledit coffre 2, et la première partie 8 et la seconde partie du barillet 7 font saillie respectivement d'un côté et de l'autre dudit coffre 2. De façon classique, le panneton 10 est destiné à coopérer avec une gorge 11 lorsqu'il est entraîné en rotation à l'aide d'une clé 40 introduite dans le barillet 7.Once the barrel 7 is correctly engaged in the trunk 2, the bit 10 is housed in said trunk 2, and the first part 8 and the second part of the barrel 7 protrude respectively on one side and the other of said trunk 2. In a conventional manner, the bit 10 is intended to cooperate with a groove 11 when it is rotated by means of a key 40 inserted into the barrel 7.

Comme représenté aux figures 1 et 3 à 5, cette gorge 11 est constituée par une plaque possédant une face interne 12 disposée d'un côté de la queue 9 du pêne 5. Cette gorge 11 présente une lumière 13 oblongue traversée par un axe 14 transversal solidaire du coffre 2. De plus, en partie haute de sa face interne 12, la gorge 11 comprend, d'une part, un épaulement 15 faisant saillie dans lequel est creusé un évidement 16 afin de constituer un logement apte à coopérer avec les dents 17 de la queue 9 du pêne 5, et d'autre part, un élément de butée 18, séparé de l'épaulement 15, et présentant une surface de contact 19 sensiblement plane. Cet épaulement 15 est surmonté par un téton 20 sur lequel est centrée une première extrémité d'un ressort de compression 21, ce dernier possédant également une seconde extrémité en appui contre un élément fixe de la serrure de porte 1.As represented in figures 1 and 3 to 5 , this groove 11 is constituted by a plate having an inner face 12 disposed on one side of the tail 9 of the bolt 5. This groove 11 has an oblong slot 13 traversed by a transverse axis 14 secured to the box 2. In addition, high part of its inner face 12, the groove 11 comprises, on the one hand, a shoulder 15 projecting into which is hollowed a recess 16 to form a housing adapted to cooperate with the teeth 17 of the tail 9 of the bolt 5, and on the other hand, a stop element 18, separated from the shoulder 15, and having a substantially flat contact surface 19. This shoulder 15 is surmounted by a stud 20 on which is centered a first end of a compression spring 21, the latter also having a second end bearing against a fixed element of the door lock 1.

Comme représenté plus particulièrement aux figures 1, 2, 4 et 5, une plaque de protection 22 pourvue d'une face interne 24 est rapportée face à la gorge 11, de l'autre côté de la queue 9 du pêne 5. Cette plaque de protection 22 présente une lumière 25 oblongue traversée par l'axe 14 transversal solidaire du coffre 2. Par ailleurs, en partie haute de sa face interne 24, la plaque de protection 22 présente une protubérance 26 comprenant une dent 27 prolongée par un ergot 28.As shown more particularly in figures 1 , 2 , 4 and 5 a protective plate 22 provided with an inner face 24 is attached to the groove 11 on the other side of the shank 9 of the bolt 5. This protective plate 22 has an oblong slot 25 through which the shaft 14 passes. transversely integral with the trunk 2. Furthermore, in the upper part of its inner face 24, the protection plate 22 has a protuberance 26 comprising a tooth 27 extended by a lug 28.

De plus, une rainure 29 parallèle à la queue 9 du pêne 5 est creusée au sommet de la protubérance 26 et constitue un logement apte à accueillir une première branche 30 d'un ressort de torsion 31 placé autour d'un élément fixe 32 solidaire de la serrure de porte 1. Comme représenté à la figure 1, la seconde branche 33 de ce ressort de torsion 31 est prévue pour venir en butée contre le retour 35 de l'un des deux flasques 3. Cet élément fixe 32 surplombe la gorge 11 ainsi que la plaque de protection 22, et est décalé par rapport à ces dernières.In addition, a groove 29 parallel to the tail 9 of the bolt 5 is hollowed at the top of the protrusion 26 and constitutes a housing adapted to receive a first branch 30 of a torsion spring 31 placed around a fixed element 32 secured to the door lock 1. As shown in figure 1 the second limb 33 of this torsion spring 31 is provided to abut against the return 35 of one of the two flanges 3. This fixed element 32 overhangs the groove 11 and the protection plate 22, and is offset by compared to these.

Comme représenté aux figures 1, 4 et 5, en fonctionnement normal, la gorge 11 et la plaque de protection 22 sont renvoyées, respectivement par le ressort de compression 21 et le ressort de torsion 31, vers la queue 9 du pêne 5. Dans cette position, l'une des dents 17 de la queue 9 du pêne 5 est logée dans l'évidement 16 présenté par l'épaulement 15 de la gorge 11 de façon à bloquer le pêne 5 en translation, la dent 27 de la protubérance 26 repose sur la queue 9 du pêne 5, et l'ergot 28 de la protubérance 26 est inséré entre l'épaulement 15 et l'élément de butée 18 ménagés dans la gorge 11. Plus précisément, l'ergot 28 est prévu pour venir en appui contre la surface de contact 19 sensiblement plane de l'élément de butée 18.As represented in figures 1 , 4 and 5 in normal operation, the groove 11 and the protection plate 22 are returned, respectively by the compression spring 21 and the torsion spring 31, to the tail 9 of the bolt 5. In this position, one of the teeth 17 of the tail 9 of the bolt 5 is housed in the recess 16 presented by the shoulder 15 of the groove 11 so as to lock the bolt 5 in translation, the tooth 27 of the protrusion 26 rests on the tail 9 of the bolt 5, and the lug 28 of the protrusion 26 is inserted between the shoulder 15 and the abutment element 18 formed in the groove 11. More specifically, the lug 28 is provided to abut against the substantially flat contact surface 19 of the abutment element 18.

Comme on peut le déduire de la figure 1, lorsqu'une personne introduit la clé 40 dans le barillet 7 afin de verrouiller ou déverrouiller le pêne 5, le panneton 10 logé dans le coffre 2 est entraîné en rotation, ou bien dans le sens des aiguilles d'une montre, ou bien dans le sens trigonométrique, et vient simultanément au contact de la gorge 11 et de la plaque de protection 22. Durant la première moitié de sa course, le panneton 10 exerce des contraintes en partie basse de la gorge 11 et de la plaque de protection 22, et provoque le déplacement en translation vers le haut de ces dernières à l'encontre respectivement du ressort de compression 21 et du ressort de torsion 31. Au cours de cette translation vers le haut, la gorge 11 et la plaque de protection 22 restent immobiles l'une par rapport à l'autre, et il en découle que l'ergot 28 demeure en appui contre la surface de contact 19 de l'élément de butée 18. Lorsque le panneton 10 atteint le point le plus haut, les dents 17 de la queue 9 du pêne 5 sont désengagées de la gorge 11, et le pêne de condamnation 5 peut alors être entraîné en translation par ledit panneton 10 au cours de la seconde moitié de sa course. Durant cette seconde moitié de course, la gorge 11 et la plaque de protection 22 sont alors animées d'un mouvement de translation vers le bas sous l'effet du ressort de compression 21 et du ressort de torsion 31 qui se détendent progressivement. Lorsque le panneton 10 a atteint le point le plus bas, l'une des dents 17 de la queue 9 du pêne 5 est logée dans l'évidement 16 de la gorge 11, et il en découle que le pêne 5 est bloqué en translation. De même que précédemment, durant cette translation vers le bas, la gorge 11 et la plaque de protection 22 restent immobiles l'une par rapport à l'autre, et par conséquent l'ergot 28 demeure en appui contre la surface de contact 19 de l'élément de butée 18.As can be deduced from the figure 1 when a person introduces the key 40 into the barrel 7 in order to lock or unlock the bolt 5, the bit 10 housed in the trunk 2 is rotated, or in a clockwise direction, or in the trigonometric direction, and simultaneously comes into contact with the groove 11 and the protection plate 22. During the first half of its stroke, the bit 10 exerts stress in the lower part of the groove 11 and the protection plate 22, and causes the translational movement upwards thereof against respectively the compression spring 21 and the torsion spring 31. During this upward translation, the groove 11 and the protection plate 22 remain motionless relative to each other, and it follows that the lug 28 remains in abutment against the contact surface 19 of the abutment member 18. When the blade 10 reaches the highest point, the teeth 17 of the shank 9 of the bolt 5 are disengaged from the groove 11, and the locking bolt 5 can then be driven in translation by said blade 10 during the second half of its travel. During this second half of the race, the groove 11 and the protection plate 22 are then moved downwardly under the effect of the compression spring 21 and the torsion spring 31 which gradually relax. When the bit 10 has reached the lowest point, one of the teeth 17 of the tail 9 of the bolt 5 is housed in the recess 16 of the groove 11, and it follows that the bolt 5 is locked in translation. As previously, during this downward translation, the groove 11 and the protection plate 22 remain immobile with respect to each other, and consequently the lug 28 remains in abutment against the contact surface 19 of the abutment element 18.

En revanche, au cours d'une tentative d'effraction, le risque que le cambrioleur réussisse à déplacer simultanément la gorge 11 et la plaque de protection 22 est très faible. En effet, compte tenu des faibles dimensions de la surface de contact 19 de l'élément de butée 18, le moindre déplacement relatif de la plaque de protection 22 par rapport à la gorge 11, comme représenté à la figure 6, ou bien de la gorge 11 par rapport à la plaque de protection 22, comme représenté à la figure 7, provoque le désengagement de l'ergot 28 de l'élément de butée 18. La plaque de protection 22 est alors entraînée en rotation par la première branche 30 du ressort de torsion 31 qui cherche à se détendre. Comme représenté à la figure 8, pour permettre le libre pivotement de la plaque de protection 22 autour de l'axe 14, un dégagement 34 est avantageusement ménagé à l'arrière de la queue 9 du pêne 5. Enfin, comme représenté à la figure 9, lorsque la plaque de protection 22 a totalement pivoté autour de l'axe 14, la dent 27 se retrouve sur la trajectoire de la queue 9 du pêne 5 et interdit donc tout retour en arrière de ce dernier. Un tel dispositif de protection de la gorge 11 de la serrure de porte 1 permet donc bien de lutter efficacement contre les tentatives d'effraction.On the other hand, during an attempted break-in, the risk that the burglar succeeds in simultaneously moving the groove 11 and the protection plate 22 is very small. Indeed, given the small dimensions of the contact surface 19 of the stop element 18, the slightest relative displacement of the protection plate 22 relative to the groove 11, as shown in FIG. figure 6 , or of the groove 11 with respect to the protection plate 22, as shown in FIG. figure 7 , causes disengagement of the lug 28 of the abutment member 18. The protective plate 22 is then rotated by the first leg 30 of the torsion spring 31 which seeks to relax. As represented in figure 8 to allow the free pivoting of the protective plate 22 about the axis 14, a clearance 34 is advantageously provided at the rear of the tail 9 of the bolt 5. Finally, as shown in FIG. figure 9 when the protection plate 22 has completely pivoted about the axis 14, the tooth 27 is found in the path of the tail 9 of the bolt 5 and therefore prohibits any return back of the latter. Such a device for protecting the groove 11 of the door lock 1 thus makes it possible to fight effectively against burglary attempts.

Bien que l'invention ait été décrite en liaison avec des exemples particuliers de réalisation, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention, telle que revendiquée.Although the invention has been described in connection with particular embodiments, it is obvious that it is not limited thereto and that it comprises all the technical equivalents of the means described and their combinations if they are within the scope of the invention as claimed.

Claims (9)

  1. Door lock, comprising a case (2) through which a cylinder (7) provided with a rotatable key-bit (10) can pass, a locking bolt (5) being able to engage with said key-bit (10) and being equipped with a tailpiece (9) having teeth (17), a tumbler (11) designed to be placed on one side of said tailpiece (9) and equipped with a stop element (18), and a first elastic return means (21) that puts said tumbler (11) into engagement with said teeth (17), this lock comprising a protection plate (22) positioned on the other side of said tailpiece (9) and being characterized in that it is intended to have at least one protrusion (26) which is able, under the effect of at least a second elastic return means (31), to bear against said stop element (18), this second elastic return means being able, if said protrusion (26) is disengaged from said stop element (18), to force said protection plate (22) to pivot about a pin (14) in order to position said protrusion (26) on the path of said tailpiece (9).
  2. Lock according to Claim 1, characterized in that the second elastic return means comprises a torsion spring (31).
  3. Lock according to Claim 2, characterized in that the torsion spring (31) has a branch (30) intended to bear against the protection plate (22).
  4. Lock according to Claim 3, characterized in that a groove (29) is formed on the upper rim of the protection plate (22) in order to receive the branch (30) of the torsion spring (31).
  5. Lock according to any one of Claims 1 to 4, characterized in that the associated stop element (18) has an approximately planar contact surface (19).
  6. Lock according to Claim 5, characterized in that a shoulder (15) is formed on the tumbler (11).
  7. Lock according to Claim 6, characterized in that the protrusion (26) of the protection plate (22) comprises a tooth (27) extended by a lug (28) designed to be inserted between the shoulder (15) and the stop element (18) formed on the tumbler (11).
  8. Lock according to any one of Claims 1 to 7, characterized in that the protection plate (22) has an approximately oblong slot (25) through which the pin (14) passes about which said protection plate can pivot.
  9. Lock according to any one of Claims 1 to 8, characterized in that a recess (34) is formed at the rear of the tailpiece (9) of the bolt (5) in order to enable the protection plate (22) to pivot.
EP20050002343 2004-02-05 2005-02-02 Protection device for a tumbler of a door lock Expired - Lifetime EP1561885B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0401116 2004-02-05
FR0401116A FR2866049B1 (en) 2004-02-05 2004-02-05 DEVICE FOR PROTECTING A GRIP FROM A DOOR LOCK

Publications (2)

Publication Number Publication Date
EP1561885A1 EP1561885A1 (en) 2005-08-10
EP1561885B1 true EP1561885B1 (en) 2008-10-15

Family

ID=34673900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050002343 Expired - Lifetime EP1561885B1 (en) 2004-02-05 2005-02-02 Protection device for a tumbler of a door lock

Country Status (3)

Country Link
EP (1) EP1561885B1 (en)
DE (1) DE602005010314D1 (en)
FR (1) FR2866049B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2438491B (en) * 2006-05-15 2011-06-01 Michael Joyce Door entry prevention device
CN101008297B (en) * 2007-01-26 2010-10-13 庄子平 Combination door lock
IT1395220B1 (en) * 2009-05-20 2012-09-05 Gruben Italia Security S P A SAFETY LOCK.
FR2963634B1 (en) * 2010-08-06 2012-09-07 Bricard DOOR LOCK COMPRISING A THROAT PROTECTION DEVICE

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2564884B1 (en) * 1984-05-23 1991-09-06 Chauvat Sofranq SECURITY DEVICE FOR APPLIED TYPE LOCK.
DE3800298A1 (en) * 1988-01-08 1989-07-20 Karrenberg Fa Wilhelm Mortise lock
DE8814086U1 (en) * 1988-11-10 1989-01-05 Mohr, Hans-Dietrich, 5830 Schwelm Lock
ATE158050T1 (en) * 1993-10-29 1997-09-15 Vachette Sa DOOR LOCK WITH PROTECTION DEVICE
FR2770247B1 (en) * 1997-10-28 1999-12-10 Fichet Serrurerie Batiment Fsb DEVICE FOR LOCKING A DOOR LOCK PENEER IN THE EVENT OF AN ATTRACTIVE ATTEMPT
FR2815660B1 (en) * 2000-10-20 2003-01-24 Stremler SLIDING LOCK WITH IMPROVED SECURITY

Also Published As

Publication number Publication date
EP1561885A1 (en) 2005-08-10
FR2866049B1 (en) 2006-06-09
DE602005010314D1 (en) 2008-11-27
FR2866049A1 (en) 2005-08-12

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