WO2010067384A1

WO2010067384A1 - Double keyhole lock, particularly for the security of residential uses

Info

Publication number: WO2010067384A1
Application number: PCT/IT2008/000749
Authority: WO
Inventors: Fausto Fustini
Original assignee: Cisa S.P.A.
Priority date: 2008-12-09
Filing date: 2008-12-09
Publication date: 2010-06-17
Also published as: EP2373859A1

Abstract

A lock (1) with double keyhole (2, 3), particularly for the security of residential uses, comprising a box-like containment body (4) provided with suitable lateral openings (5), for the passage of at least one spring latch (6) and of at least one bolt (7), with a plurality of substantially laminar members (8) that are functionally associated with a first cylinder, operated by a respective key and accommodated in a first keyhole (2), with a rotatable element (9), for the engagement of a handle, which is associated with the at least one spring latch (6) by means of lever systems and is designed for the movement of the spring latch (6), and with a latch (10) that is functionally associated with a second cylinder, which is operated by a respective key and is accommodated in a second keyhole (3), and comprising a plate (12) that performs a translational motion and is functionally associated in an upper region with the rotatable element (9) and in a lower region with a laminar member (8) that is jointly connected to the bolts (7) by means of a carousel (13) that is pivoted, in another point, to the box-like body (4). The arrangement of the latch (10) in a preset positioning configuration, set by the second cylinder, produces a misalignment between an abutment member (14) of the rotatable element (9) on the translating plate (12) and the plate (12) itself, with consequent mutual uncoupling thereof; the rotation of the rotatable element (9), consequent to the rotation of the handle, causes the retraction of the at least one spring latch (6) and of the at least one bolt (7), unless the latch (10) is in the preset positioning configuration, in which the rotation determines only the retraction of the at least one spring latch (6).

Description

DOUBLE KEYHOLE LOCK, PARTICULARLY FOR THE SECURITY OF RESIDENTIAL USES Technical field

The present invention relates to a double keyhole lock, particularly for the security of residential uses. Background art

A reinforced door, used typically as an entrance door of apartments and offices, is provided with suitable laminar reinforcement elements intended to provide overall stiffening and to make it difficult to produce damage for break-in purposes.

For a door of this type it is necessary to provide components that have the same degree of security against break-ins as the door itself: the hinges must be oversized in order to bear the great weight of the door and withstand any break-in blows and the lock must have bolts that protrude appropriately and are adapted to engage within respective selvages of the jamb that are particularly deep and firmly anchored to the wall.

Locks of this type normally provide for the actuation of the spring latch by means of a handle (in some cases provided only on the inner side of the door and in other cases on both sides) and of the bolts by means of the rotation of the key within the cylinder.

For some kinds of installation it is not possible to adopt this kind of lock, since specific legal obligations require exit routes to have antipanic handles installed.

Known types of constructive solution for locks for reinforced doors therefore do not provide the possibility to retract the bolts by operating the handle: it must therefore be possible to lock the bolts in a retracted configuration for all the time during which the antipanic function is necessary, i.e., while such space is occupied by people.

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However, adopting this solution is not allowed by many statutory provisions, since the security condition for the user is required to persist constantly.

One drawback of all locks that have an antipanic function resides in that this function makes the lock insecure in case of theft in the space delimited by the door in which such lock is installed. If the thief is able to enter the space (for example through a window), he can comfortably exit from the main door (even if it is locked with several turns and therefore with the bolts completely extracted), because the rotation of the handle with antipanic function entails the retraction of the spring latch and of the bolts. Moreover, the possibility to provide the key of the lock to service personnel while in any case maintaining a preset standard of security also with respect to such personnel is not provided: once the service personnel acquires the key, such personnel can enter and exit at will from the space delimited by the door on which the lock is installed, without any limitation. Disclosure of the Invention

The aim of the present invention is to provide a double keyhole lock, particularly for the security of residential uses, whose behavior and operating modes are variable depending on the type of use set by users.

Within this aim, an object of the present invention is to provide a double keyhole lock, particularly for the security of residential uses, that is suitable for controlled enabling/disabling of the key reserved for service personnel and the like.

Another object of the present invention is to provide a double keyhole lock, particularly for the security of residential uses, that is adapted to increase the level of security with respect to traditional locks.

Another object of the present invention is to provide a selector for locks of reinforced doors and the like that has a low cost, is relatively simple to provide in practice, and is safe in application.

This aim and these and other objects, which will become better apparent hereinafter, are achieved by a double keyhole lock, particularly for the security of residential uses, of the type that comprises a box-like containment body provided with suitable lateral openings, for the passage of at least one spring latch and of at least one bolt, with a plurality of substantially laminar members that are functionally associated with a first cylinder, operated by a respective key and accommodated in a first keyhole, with a rotatable element, for the engagement of a handle, which is associated with said at least one spring latch by means of lever systems and is designed for the movement of said spring latch, and with a latch that is functionally associated with a second cylinder, which is operated by a respective key and is accommodated in a second keyhole, and comprising a plate that performs a translational motion and is functionally associated in an upper region with said rotatable element and in a lower region with a laminar member that is jointly connected to the bolts by means of a carousel that is pivoted, in another point, to said box-like body, characterized in that the arrangement of said latch in a preset positioning configuration, set by said second cylinder, produces a misalignment between the abutment member of the rotatable element on said translating plate and the plate itself, with consequent mutual uncoupling of said abutment member and of said plate, the rotation of the rotatable element, consequent to the rotation of the handle, causing the retraction of the at least one spring latch and of the at least one bolt, unless the latch is in said preset positioning configuration, in which said rotation determines only the retraction of the at least one spring latch. Brief description of the drawings Further characteristics and advantages of the invention will become better apparent from the following detailed description of preferred but not exclusive embodiments of a double keyhole lock, particularly for the security of residential uses, illustrated by way of non-limiting example in the accompanying drawings, wherein: Figure 1 is a partially sectional perspective view of a first embodiment of a double keyhole lock, particularly for the security of residential uses, without some of its components;

Figure 2 is a partially sectional perspective view, taken along a different orientation with respect to Figure 1 , of the first embodiment of a double keyhole lock, particularly for the security of residential uses, without some of its components;

Figure 3 is a partially sectional perspective view of a second embodiment of a double keyhole lock, particularly for the security of residential uses, provided with some additional elements with respect to what is shown in Figures 1 and 2, and without other components;

Figure 4 is a partially sectional perspective view, with a different orientation with respect to Figure 3, of the second embodiment of a double keyhole lock, particularly for the security of residential uses, provided with some additional elements with respect to what is shown in Figures 1 and 2 and without other components;

Figure 5 is a partially sectional perspective view of a third embodiment of a double keyhole lock, particularly for the security of residential uses, provided with some additional elements with respect to what is shown in Figures 3 and 4 and without other components; Figure 6 is a partially sectional perspective view, with a different orientation with respect to Figure 5, of the third embodiment of a double keyhole lock, particularly for the security of residential uses, provided with some additional elements with respect to what is shown in Figures 3 and 4 and without other components; Figure 7 is a partially sectional perspective view of a fourth embodiment of a double keyhole lock, particularly for the security of residential uses, provided with some additional elements with respect to what is shown in Figures 5 and 6 and without other components;

Figure 8 is a partially sectional perspective view, with a different orientation with respect to Figure 7, of a fifth embodiment of a double keyhole lock, particularly for the security of residential uses, provided with some additional elements with respect to what is shown in Figures 5 and 6 and without other components. Ways of carrying out the Invention With reference to the figures, the reference numeral 1 generally designates a lock with double keyhole 2, 3, particularly for the security of residential uses.

The lock 1 comprises a box-like containment body 4, which is provided with suitable lateral openings 5 for the passage of at least one spring latch 6 and at least one bolt 7, with a plurality of substantially laminar members 8 that are functionally associated with a first cylinder, which is operated by a respective key and is accommodated in the first keyhole 2, with a rotatable element 9, for the engagement of a handle, which is associated with the spring latch 6 by means of lever systems and is designed to move the spring latch 6.

Further, the box-like body 4 comprises a latch 10, which faces outside through a corresponding seat 11 of the box-like body 4, that is functionally associated with a second cylinder, which is actuated by a respective key and is accommodated in the second keyhole 3. The lock 1 further comprises a translating plate 12, which is functionally associated in an upper region with the rotatable element 9 and, in a lower region, with one of the laminar members 8 that is jointly connected to the bolts 7 by means of a carousel 13, which is pivoted in another point to the box-like body 4. The box-like body 4 is substantially shaped like a parallelepiped, with two mutually opposite faces, a bottom 4a and the top, which have a large surface and four lateral edges: the upper one, the lower one, the front one, comprising the openings 5 and the seat 11 , and the rear one (not shown in the figure). The box-like body 4 can be provided by adopting the standard dimensional specifications for this type of lock 1, with the advantage that it can be installed in any reinforced door without requiring any modification thereof.

According to the embodiments shown in the figures, the bolts 7 are four cylindrical elements, which are arranged in a parallel configuration and can slide transversely with respect to the lock 1. There are embodiments which provide for the adoption of additional bolts that protrude from the upper edge and from the lower edge for association with transmission rods adapted to actuate bars that perform a translational motion with respect to the door and are arranged at any distance from the lock 1. When the latch 10 is in a preset positioning configuration set by the second cylinder, it produces a misalignment between an abutment member 14 of the rotatable element 9 on the translating plate 12 and the plate 12, with consequent mutual disengagement thereof.

In practice, the rotation of the rotatable element 9, as a consequence of the rotation of the handle, always causes the retraction of the spring latch 6 and of the bolts 7, unless the latch 10 is in the preset positioning configuration in which the rotation determines only the retraction of the spring latch 6.

In particular, it should be stressed that a movable lamina 15 is interposed between the plate 12 and the abutment member 14 of the rotatable element 9; the lamina 15 is coupled to the plate 12 by means of a pivot 16 engaged in an appropriately provided slot 17 of the plate 12.

The lamina 15 can move from a first configuration, in which a protruding tooth 18 thereof is aligned and proximate to the abutment element 14, to a second configuration, in which the tooth 18 is separated and does not interfere with the stroke of the rotatable element 9: in this second configuration, the rotation of the element 9, by way of the action of the handle, does not impart a translational motion of the plate 12, with consequent rotation of the carousel 13 and retraction of the bolts 7. This means that in this second configuration a rotation of the handle is matched only by the retraction of the spring latch 6.

The movable lamina 15 is arranged so as to rest substantially on the bottom 4a of the box-like body 4 and has a longitudinal slot 19 which accommodates a pin 20 which is fixed to the bottom 4a. to guide the lamina 15 during its sliding.

The lock 1 comprises a substantially flat mask 21 , which is associated with the latch 10 by means of a protruding stem 22, which is engaged in a corresponding contoured slot 23.

The mask 21 can perform a translational motion from a raised arrangement, which corresponds to preset arrangements of the latch 10, to a lowered arrangement, which corresponds to the already mentioned preset positioning configuration of the latch 10, the one that corresponds to the disengagement of the rotatable element 9 from the bolts 7.

The mask 21 comprises an end flap 24, which is provided with a notch 25 that accommodates the fixed pin 20, and a protrusion 26, which rests against a contoured edge 15a of the movable lamina 15.

The movement of the protrusion 26, as a consequence of the translational motion of the mask 21 from the raised arrangement to the lowered arrangement, imposes a rotation of the lamina 15 with respect to the fixed pin 20 (according to the embodiment shown in the accompanying figures, the rotation with respect to the pin 20 occurs clockwise, so that the lower end of the lamina moves to the left), with consequent movement (to the left in the figure) of the protruding tooth 18 in the second configuration, in which the tooth 18 is separated and does not interfere with the stroke of the rotatable element 9.

According to an embodiment of particular interest in practice and in application, shown in Figures 7 and 8, the preset positioning configuration of the latch 10, i.e., the one in which the rotation of the element 9 determines exclusively the retraction of the spring latch 6, corresponds to a complete extraction of the latch 10 with respect to the box-like body 4. With specific reference to the embodiments shown in the accompanying figures, but without any limitation to the scope of application, the abutment member 14 is constituted by an arm 27, which is coupled to the rotatable element 9 and is arranged substantially radially with respect to it.

Again with reference to the specific embodiment shown in Figures 7 and 8, the protruding tooth 18 is constituted by a flap of the lamina 15, which is folded substantially at right angles with respect to the lamina 15. The operation of the lock 1 according to the invention is as follows. When the latch 10 is kept in a partially retracted configuration, the protruding stem 22 is arranged in a linear region of the contoured slot 23.

When the latch 10 is extracted completely, the stem 22 instead acts on a suitably contoured portion of the slot 23, causing a lowering of the mask 21. The lowering of the mask 21 produces a lowering of the protrusion

26, which by sliding on the contoured edge 15a is forced with the edge 15a (in order to be able to descend, the protrusion 26 must move the contoured portion of the edge 15a).

The movement of the contoured portion of the edge 15a forces a rotation of the lamina 15 about the fixed pin 20, with consequent movement to the left, more generically a consequent misalignment with respect to the abutment member 14, by way of which the tooth 18 is no longer located along the path followed by the member 14 when the handle forces a rotation of the element 9. In practice, by closing the lock 1 with the latch 10, operated by a respective cylinder inserted in the keyhole 3, it becomes impossible to open the lock 1 by means of the retraction of the spring latch 6 and of the bolts 7 simply by turning the handle. This condition is instead the one in which the lock 1 is normally when the latch 10 is completely retracted. The possibility to associate with different positions of the latch 10 the enabling/disabling of the facilitated opening function of the lock 1 by means of the movement of the handle is not excluded.

The cylinders used may be substantially of any type; the adoption of specific locks for keys with a double blade instead of the cylinders is not excluded.

It has thus been shown that the invention achieves the proposed aim and objects.

The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.

All the details may further be replaced with other technically equivalent ones.

In the exemplary embodiments shown, individual characteristics, given in relation to specific examples, may actually be interchanged with other different characteristics that exist in other exemplary embodiments.

Moreover, it is noted that anything found to be already known during the patenting process is understood not to be claimed and to be the subject of a disclaimer.

Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A lock (1) with double keyhole (2, 3), particularly for the security of residential uses, of the type that comprises a box-like containment body (4) provided with suitable lateral openings (5), for the passage of at least one spring latch (6) and of at least one bolt (7), with a plurality of substantially laminar members (8) that are functionally associated with a first cylinder, operated by a respective key and accommodated in a first keyhole (2), with a rotatable element (9), for the engagement of a handle, which is associated with said at least one spring latch (6) by means of lever systems and is designed for the movement of said spring latch (6), and with a latch (10) that is functionally associated with a second cylinder, which is operated by a respective key and- is accommodated in a second keyhole (3), and comprising a plate (12) that performs a translational motion and is functionally associated in an upper region with said rotatable element (9) and in a lower region with a laminar member (8) that is jointly connected to the bolts (7) by means of a carousel (13) that is pivoted, in another point, to said box-like body (4), characterized in that the arrangement of said latch (10) in a preset positioning configuration, set by said second cylinder, produces a misalignment between an abutment member (14) of the rotatable element (9) on said translating plate (12) and the plate (12) itself, with consequent mutual uncoupling of said abutment member and of said plate, the rotation of the rotatable element (9), consequent to the rotation of the handle, causing the retraction of the at least one spring latch (6) and of the at least one bolt (7), unless the latch (10) is in said preset positioning configuration, in which said rotation determines only the retraction of the at least one spring latch (6).

2. The lock according to claim 1, characterized in that a movable lamina (15) is interposed between said plate (12) and said abutment member (14) of said rotatable element (9) and is jointly connected to the plate (12) by means of a pivot (16) which is engaged in an appropriately provided slot (17) of the plate (12), said lamina (15) being movable from a first configuration, in which a protruding tooth (18) thereof is aligned with and proximate to said abutment element (14), to a second configuration, in which said tooth (18) is separated and does not interfere with the stroke of the abutment member (14) of said rotatable element (9).

3. The lock according to claim 2, characterized in that said movable lamina (15) is arranged so as to rest substantially on the bottom (4a) of said box-like body (4) and has a longitudinal slot (19) within which a pin (20) is accommodated which is fixed on the bottom (4a) of said box-like body (4) to guide the lamina (15) during its sliding.

4. The lock according to claim 1 , characterized in that it comprises a substantially flat mask (21), which is associated with said latch (10) by means of a protruding stem (22), which is engaged in a corresponding contoured slot (23), said mask (21) being able to perform a translational motion from a raised arrangement, which corresponds to preset arrangements of the latch (10), to a lowered arrangement, which corresponds to said preset positioning configuration of said latch (10).

5. The lock according to claims 2 and 3, characterized in that said mask (21) comprises an end flap (24), which is provided with a notch (25) that accommodates said fixed pin (20) and a protrusion (26), which rests against a contoured edge (15a) of said movable lamina (15), the movement of the protrusion (26), as a consequence of the translational motion of the mask (21) from said raised arrangement to said lowered arrangement forcing a rotation of the lamina (15) with respect to the fixed pin (20), with consequent movement of said protruding tooth (18) in said second configuration, in which said tooth (18) is separated and does not interfere with the stroke of the member (14) of said rotatable element (9).

6. The lock according to one or more of the preceding claims, characterized in that said preset positioning configuration of the latch (10) in which said rotation of said element (9) determines only the retraction of the at least one spring latch (6) corresponds to a complete extraction of said latch (10) with respect to the box-like body (4).

7. The lock according to one or more of the preceding claims, characterized in that said abutment member (14) is constituted by an arm (27), which is coupled to said rotatable element (9) with a direction that is substantially radial with respect to said element (9).

8. The lock according to one or more of the preceding claims, characterized in that said protruding tooth (18) is constituted by a flap of said lamina (15) that is folded substantially at right angles to said lamina (15).