DESCRIPTION

The present invention refers to a lock to be applied to a wall of a door leaf, comprising a box-like body in which an extractabie latch and/or extractable bolt are positioned.

There is a prior-art electric lock that is to be applied to an inside wall of a door leaf, in which the box-like body has a closing cover, which in the first version of the electric lock supports only one command cylinder for actuating a retraction mechanism of the latch and/or bolt, in a second version supports only one command button for actuating the retraction mechanism of the latch and/or bolt, and in a third, more advanced version supports a command cylinder and a command button.

In the third version of the electric lock, the command cylinder does not have an opening and closing function, but it exclusively performs the function of switching the command button between an operative state in which it can be pressed for opening, a locked state in a pressed hold-open position and a locked state in a non-pressed position.

As is known, variants of electric locks offered on the market are also differentiated by left or right hand opening and by the entry, defined as the centre-to-centre distance between the cylinder and the lateral wall of the box-like body from which the latch and/or the bolt projects. All these variants of electric locks obviously entail considerable complications of the logistics related to supplying, transporting and storing the pieces.

The technical task of the present invention is therefore to realize a lock for application that is highly flexible in terms of use and that makes it possible to eliminate the cited technical drawbacks of the prior art.

Within the scope of this technical task, one aim of the invention is to realize a lock for application that is capable of incorporating different functions comprised in various versions of locks present on the market and adding other functions as well.

Another aim of the invention is to provide a lock for application that is simple in construction, compact and easy to assemble and install on the door leaf.

The technical task, as well as these and other aims, according to the present invention, are achieved by realizing a lock to be applied to a wall of a door leaf, comprising a box-like body that has a rear wall that can be applied to said wall of said door leaf, a latch and/or a bolt positioned in the box-like body and extractable from a lateral wall of the box-like body, and a closing front cover of the box-like body, said closing cover supporting a command cylinder of a first actuating element of a retraction mechanism of said latch and/or bolt, and a command button of a second actuating element of said retraction mechanism of said latch and/or bolt, characterized in that it comprises means of selective deactivation of said command cylinder or of said command button.

In a preferred embodiment of the invention, the deactivation means are provided on a support element of said second actuating element interacting with a support element of said first actuating element.

In a preferred embodiment of the invention, said support element of said second actuating element is constrained to said command button in a switchable manner between a first configuration in which said deactivation means deactivate said command cylinder and a second configuration in which said deactivation means deactivate said command button.

In a preferred embodiment of the invention, said support element of said second actuating element in said first configuration has an unlocked state in which the command button operates, a first locked state in which the command button is locked in the activated position, and a second locked state in which the command button is locked in the deactivated position.

In a preferred embodiment of the invention, said command button is translatable and said support element of said second actuating element is constrained to the command button integrally in translation and is rotatable with respect to the command button around an axis parallel to the direction of translation of the command button for switching between said first and said second configuration.

The lock for application can be electric, electromechanical or mechanical, and it can comprise for example only one latch or only one bolt, or a latch and a bolt together, or also a reloading piston, all of which being extractable from the box-like body upon command by the cylinder. Other characteristics of the present invention are also defined in the claims herein below.

Further characteristics and advantages of the invention will become more apparent from the description of a preferred, but not exclusive, embodiment of the lock for application, according to the invention, and which is illustrated by way of indicative and thus non-limiting example in the attached drawings, of which:

Figure 1 is an exploded view of an electromechanical lock in accordance with the invention. Figures 2a and 2b are perspective views from the inside and outside of the front element of the cover of the box-like body and of the components connected thereto, in which the command button, shown in the non-pressed position, is activated and operating, and the command cylinder is deactivated.

Figures 3a and 3b are perspective views from the inside and outside of the front element of the cover of the box-like body and of the components connected thereto, in which the command button, shown in the pressed position, is activated and operating, and the command cylinder is deactivated. Figures 4a and 4b are perspective views from the inside and outside of the front element of the cover of the box-like body and of the components connected thereto, in which the command button is activated and locked in the non-pressed position, and the command cylinder is deactivated.

Figures 5a and 5b are perspective views from the inside and outside of the front element of the cover of the box-like body and of the components connected thereto, in which the command button is activated and locked in the pressed position, and the command cylinder is deactivated. Figures 6a and 6b are perspective views from the inside and outside of the front element of the cover of the box-like body and of the components connected thereto, in which the command button is deactivated and locked in the pressed position, and the command cylinder is activated. Figure 7 is the same view appearing in Figure 2a, from which the front element of the cover has been removed.

Figures 8 and 9 are side elevations from behind the lock appearing in Figure 1, with selection of the left and right hand opening.

With reference to the figures cited, a lock to be applied to a wall of a door leaf is shown and indicated in its entirety by reference number 1.

By way of example, the lock described is an electromechanical lock.

The lock 1 comprises a box-like body 2 that has a flat rear wall 3 that is applicable to the wall of the door leaf, a latch 4 positioned in the box-like body 2 and extractable from a lateral wall 5 of the box -like body 2, and a closing front cover 6 of the box-like body 2.

The closing front cover 6 of the box-like body 2 has a handle 40 for gripping the lock 1.

The closing cover 6 supports a command cylinder 7 and a command button 8.

In a manner known in the prior art, the command cylinder 7 comprises a stator 9 in which a rotor 10 is housed, said rotor 10 having a cam 1 1 and a slot 50 for introducing a coded key.

The cam 1 1 of the rotor 10 is adapted to actuate a first actuating element 12 of a retraction mechanism 13 of the latch 4.

The retraction mechanism 13 is of a well-known type and therefore it shall not be described.

A second actuating element 14 of the retraction mechanism of the latch 4 is connected to the command button 8.

The lock 1 advantageously comprises means of selective deactivation of the command cylinder 7 or of the command button 8.

The deactivation means 15 are provided on a support element 16 of the second actuating element 14 interacting with a support element 17 of the first actuating element 12.

The support element 16 of the second actuating element 14 is constrained to the command button 8 in a switchable manner between a first configuration in which the deactivation means 15 deactivate the command cylinder 7 and a second configuration in which the deactivation means deactivate the command button 8.

The support element 16 of the second actuating element 14

The command button 8 can be activated manually in opposition to a return spring 18 in a direction of translation perpendicular to the fiat rear wall 3 of the box-like body 2.

The support element 16 of the second actuating element 14 is constrained to the command button 8 integrally in translation, but it is rotatable with respect to the command button 8 around an axis parallel to the direction of translation of the command button 8 for switching between the first and the second configuration.

The support element 16 of the second actuating element 14 is formed of a stem 19 that extends behind the command button 8. The end of the stern 19 distal from the command button 8 is guided so as to slide along translation guides 21 from which it can be released for switching between the first and the second configuration.

The second actuating element 14 is provided at the end of the stem 19 distal from the command button 8. and in particular, it is constituted by a semi-conical formation 51 made as a single piece with the stem 19.

The deactivating means 15 comprise for deactivation of the command button 8 a slot 20 of the stem 19 at the end of the stem 19 distal from the command button 8.

The support element 17 of the first actuating element 12 is formed of a plate 22 supported by the cover 6 in a translatable manner parallel to the flat rear wall 3 of the box-like body 2.

The plate 22 is flat in configuration and it is arranged parallel to the flat rear wall 3 of the boxlike body 2.

The plate 22 has an internal through opening 31 through which the command cylinder 7 and the stem 19 are arranged.

The first actuating element 12 is formed of a tab 23 that extends perpendicularly from and behind the external edge of the plate 22 and it is fashioned as a single piece with the plate 22. The front cover 6 of the box-like body 2 is formed of a front element 24 and a rear element 38 that delimit a closed compartment in which there are special guide posts 25, 25 for guiding the plate 22 in translation.

The command button 8 and the command cylinder 7 are accessible on the external side of the front element 24 of the front cover 6.

Adjustment of the hand of the lock is made possible by a screw 26 that is supported by the cover 6 inside the compartment and that has an eccentric 27 engaged in a groove 28 for sliding provided in the plate.

Once the hand of the lock has been set, the adjustment screw 26 also has the function of guiding translation for the plate 22.

The adjustment screw 26 is rotatable on its own axis so as to have the plate 22 oscillate between a first angular position in which the cam 1 1 of the rotor 10 is engageable with a first drawing element 29 for drawing the plate 22 and a second angular position in which the cam 11 of the rotor 10 is engageable with a second drawing element 30 for drawing the plate 22.

The adjustment screw 26 and the stem 19 as well are accessible from the external side of the flat rear wall 3 of the box-like body 2.

The drawing elements 29, 30 are formed of shaped tabs extending perpendicularly from and behind the internal edge of the plate 22 delimiting the opening 31 and they are fashioned as a single piece with the plate 22.

The deactivating means 15 comprise for deactivation of the command cylinder 7 a lateral arrest surface 32 of the stem 19 for the support element 17 of the first actuating element 12.

In particular, the arrest surface 32 is adapted to interact with a tooth 33 that is coplanar with the plate 22 and fashioned more precisely by specific shaping of the edge of the opening 31 of the plate 22.

The plate 22 has additional selective engaging teeth 34, 35 in a first lateral recess 36 of the stem 19 to retain the stem 19 in the first locked state or in a second lateral recess 37 of the stem 19 offset from the first recess 36 along the axis of the stem 19 so as to retain the stem 19 in the second locked state.

The teeth 34, 35 are coplanar with the plate 22 and more precisely, in this case as well they are fashioned by specific shaping of the edge of the opening 31 of the plate 22. The operation of the lock 1 is briefly as follows.

The first actuating element 12 and the second actuating element 14 are adapted to act directly on the same releasing element 41 for releasing the retraction mechanism 13.

The lock 1 is initially supplied with the stem 19 in the first configuration and in the unlocked state. In its first configuration, the stem 19 faces the tooth 33 of the plate 22 the arrest surface 32. In the unlocked state of the stem 19, the position of the plate 22 is such that the arrest surface 32 intercepts the tooth 33, whereas the teeth 34, 35 are disengaged from the recesses 36, 37.

In this state, the lock 1 deactivates the command cylinder 7. in that, although the releasing element 41 is on the trajectory of the first actuating element 12, the arrest surface 32 intercepts the tooth 33 so as to lock the plate 22 before the first actuating element 12 can come into contact with the releasing element 41 for actuating it. However, the command button 8 is operative, in that it is free to move the second actuating element 14 on the trajectory of which the releasing element 41 is found.

If the user presses the command button 8, the second actuating element 14 translates until it presses against the releasing element 41, which is thus actuated.

With the stem 19 still in the first configuration, the user can decide to bring it into the first locked state, in which the command button 8 is locked in the activated position (the position assumed by the pressed command button 8). When the command button 8 is pressed, the teeth 34, 35 are aligned with the recess 36. With a turn of the key in the rotor 10 in the closing direction, the cam 1 1 of the rotor 10 engages one of the drawing elements 29, 30 that move the plate 22 until bringing about the engagement of the teeth 34, 35 in the recess 36. The command button 8 is locked in the activated position in a state of the lock 1 called "hold-open". The operating state of the command button 8 can be restored with a turn of the key in the rotor 10 in the opening direction.

With the stem 19 still in the first configuration, the user can also decide to bring it into the second locked state, in which the command button 8 is locked in the deactivated position. When the command button 8 is not pressed, the teeth 34, 35 are aligned with the recess 37. With a turn of the key in the rotor 10 in the closing direction, the cam 1 1 of the rotor 10 engages one of the drawing elements 29. 30 that move the plate 22 until bringing about the engagement of the teeth 34, 35 in the recess 37. The operating state of the command button 8 can be restored with a turn of the key in the rotor in the opening direction.

When the lock 1 is supplied with the stem 19 in the first configuration and with the command button 8 in the unlocked state and one wishes to exclude the functions performed by the command cylinder 7, a plug that blocks introduction of the key in the slot 50 of the rotor 10 can be mounted on the command cylinder 7. In this case, the plug preferably has fastening means that cannot be removed when the lock 1 is installed.

Hypothetically, when the user now decides to deactivate the command button 8, the command button 8 will have to be pressed so as to have the end of the stem 19 distal from the command button 8 project from the relative translation guides 21 and align the recess 36 with the tooth 33, and then the stem 19 manually rotated until engaging the recess 36 in the tooth 33.

In this state, the lock 1 deactivates the command button 8, in that the releasing element 41 is now presented with the slot 20 in place of the second actuating element 14.

However, the pressed command button 8 remains locked in this position due to the interference of the tooth 33 with the recess 36.

At the same time, in this state, the lock 1 activates the command cylinder 7, given that the tooth 33, which slides freely in the recess 36, enables the first actuating element 12 to move until it comes into contact with the releasing element 41 for actuating it.

Thus conceived, the lock for application that is highly flexible in terms of use is susceptible to numerous modifications and variants, all of which falling within the scope of the inventive concept. Moreover, all details may be replaced with other technically equivalent elements.

The materials used, as well as the dimensions, may in practice he of any type, according to needs and the state of the art.