The present invention relates to the field of human-machine interaction and particularly to an interface for controlling devices used in industrial and domestic contexts.

Buttons are one of the simplest mechanisms and for this reason they are widespread for controlling machines or processes. Typically made of rigid material, such as plastics or metal, they often have a surface that is generally flat or contoured to accommodate the finger or the hand, so as to be pushed and released easily. Such buttons, especially if used in the industrial field, must be sturdy, since they withstand great stresses, and must be very reliable, i.e., they must allow constant control of the device on which they are fitted. A typical example of widely used button is the M22 type, known by this name because it has a connector with a circular cross- section that measures 22 mm in diameter. Such type of button is appreciated for being easy to install, because its wide diffusion has rendered it compatible with many commercially available devices, i.e., it is supported natively without requiring additional interfaces for its installation.

Modern touchscreens also allow the user to interact directly with the device on which they are mounted without using additional apparatuses such as a mouse or a touchpad. The spread of this type of screen is due to the fact that they allow intuitive, fast and accurate user interaction with the content shown on the screen. In any case, differently from traditional electromechanical interfaces of the M22 type, the touchscreen is often installed on dedicated devices such as smartphones according to methods that are not standard.

The background art lacks a system capable of combining the sturdiness and compatibility of interfaces based on M22 technology with the benefits deriving from the use of a touchscreen.

Within this aim, an object of the present invention is to provide a system that can be adapted and used in different contests.

A further object of the invention is to provide a system that is functional and efficient.

Another object of the present invention is to provide a system that is sturdy and gives assurances of safety.

This aim and these and other objects that will become better apparent hereinafter are achieved by a system according to claim 1.

Advantageously, the system requires the use of materials that are easily commercially available.

Conveniently, the system can be integrated in existing devices.

Preferably, the system allows simpler installation and quicker maintenance.

Conveniently, the system is not constrained to the use of a particular communications standard.

Further characteristics and advantages of the invention will become better apparent from the following detailed description, given by way of non-limiting example and accompanied by the corresponding drawings, wherein:

Figure 1 is a block diagram of the system according to the present invention;

Figures 2a and 2b are views of an aspect of the system of Figure 1 ; Figure 3 is a view of an embodiment of the system of Figure 1 ;

Figure 4 is a more detailed view of a further aspect of the system of Figure 1.

An exemplifying architecture of the system according to the present invention is summarized in the block diagram of Figure 1.

Figure 1 comprises a monitor 10 and a cylindrical body 14.

The monitor 10 comprises a liquid crystal display ("LCD") 1 1 and a panel 12 adapted to contain it. The monitor 10 has a depth of preferably not more than 18 mm and is adapted to be inserted for- example in industrial panels, preferably with a depth of no more than 15 mm, in recesses in walls, in wall-mounted containers for electrical material, known as wall boxes, or in machinery. Furthermore, the monitor 10 may comprise circuitry adapted to process and exchange data.

The screen 1 1 is of a known type and comprises an optical electronic device adapted to reproduce images. The screen 11 is flat, of the touchscreen type, preferably of the capacitive type, that allows a user to react to what is displayed, for example in order to control the display mode or to enter data. The screen 1 1 is based on liquid crystal technology, preferably of the TFT type or OLED type.

The screen 1 1 has preferably dimensions equal to 5 or 7 inches with a resolution of 800x480 pixels. The screen 1 1 can have also smaller dimensions, equal to 3.5 inches with low resolution, or greater, equal to 10.2 or 15 inches, and a resolution equal to 1280x800 pixels. The screen 1 1 preferably has maximum dimensions equal to 23 inches.

Preferably, the screen does not use plastic material and is mounted on the panel 12.

The panel 12, in addition to being the support for the screen 1 1 , has, on the side opposite to the one on which the screen 1 1 is mounted, an interface, preferably arranged in a central position of the panel proper, which is adapted to receive the cylindrical body 14 that will be presented hereinafter. Preferably, this interface comprises a circular cavity with a diameter equal to 22 mm.

In addition, the panel 12 has gaskets 13 adapted to make the installation of the cylindrical body 14 safer and more stable.

The cylindrical body 14 comprises an enclosure, preferably made of aluminum and obtained by means of the pressure die-casting technique, that has an end face adapted to be accommodated inside the cavity of the panel 12 and a second end face adapted to accommodate a device for the transmission of data. The lateral surface of the enclosure of the cylindrical body has, moreover, a thread that allows a helical coupling. The thread can take the appearance of a groove with a helical shape, cut into the cylindrical surface of the body 14, while the longitudinal cross-section usually has an approximately triangular shape, with an alternation of external peaks and internal peaks. The thread allows to apply a locking ring that allows the flush assembly, for example by screwing, of the monitor 10 on a recess, such as a wall, and industrial cabinet or a domestic device. The constructive characteristics of the cylindrical body 14 are such as to make it equivalent to an M22 connector and therefore the diameter of its circular cross-section is 22 mm or substantially equal to 22 mm. Consequently, the system of Figure 1 can be installed on all apparatuses that are compatible or that in any case have interfaces that allow to fix it.

The device for the transmission of data is preferably an Ethernet RJ- 45 - IS08877 10-100 cable with Power over Ethernet (PoE) functionality according to the POE 802.3 af/at standard. The POE standard allows the simultaneous transmission of energy and data using an Ethernet cable. The Ethernet cable has a maximum diameter of 18.4 mm, so that it can be inserted easily inside the cylindrical body 14.

The cable supplies power to the screen 1 1 and allows the exchange of data with it. The Ethernet cable is therefore connected to the screen on one side of the transmission and on the other side is connected to a unit adapted to supply and receive data from it. For example, this unit might be an industrial machine and the monitor 10 might be used as an interface for controlling one aspect of this machine, for example as a knob for opening a valve. In this case, the monitor shows an icon that represent a virtual knob. By way of the functionalities of the touchscreen, the operator can stimulate the screen so as to simulate the rotation of the knob. The command, conveniently encoded by suitable circuitry, is transmitted by means of the electronic device in order to be then received and processed by the machine. Accordingly, the valve is opened. The machine may send a confirmation of actual opening by transmitting a data item on the electronic device toward the screen 1 1. The screen 1 1 shows conveniently such confirmation for example by means of a luminous signal.

Figures 2a, 2b illustrate an adapter to allow the installation of the system of Figure 1 on containers for electrical cables built into walls, usually termed wall boxes. In fact, such wall boxes are not provided natively with a support for the M22 connectors and therefore an adapter that allows the screwing of the cylindrical body 14 is necessary.

In particular, Figures 2a and 2b show respectively a lateral and front section of said adapter 16. The adapter 16 has dimensions adapted to receive the cylindrical body 14. In a preferred embodiment, it has a diameter of no more than 60 mm and a length comprised between 49 mm and 50 mm. The adapter 16 allows the passage of the electronic device for the transmission of data and the screwing of the cylindrical body 14.

Figure 3 shows the system of Figure 1 , which is further adapted to be used in conjunction with the adapter of Figures 2a and 2b. In particular, the panel 12 comprises a fixing device based on elastic coupling, which has springs or flexing elastic parts 17 adapted to be interlocked on a flush adapter 18 that is fixed by way of screws to the wall box.

Figure 4 shows in greater detail the system of Figure 1 , further adapted to be used in industrial contexts, in which intense vibrations, extreme temperatures and humid or dusty conditions might damage the monitor 10.

In particular, the system comprises moreover an enclosure 19, a second screen 20, a heat sink 21, a plastic frame 22 and gaskets 23.

The enclosure 19 is adapted to shield electromagnetic interferences and has such dimensions as to allow to contain both the data transmission device and the monitor 10. The enclosure 19 is preferably made of aluminum and is reinforced so as to withstand mechanical stresses. The second screen 20 is based on PCAP capacitive technology and is adapted to protect the screen 1 1 from excessive pressures or external agents.

The heat sink 21 protects the system from temperature variations.

The plastic frame 22 is provided so as to reinforce the area comprised between the screen 1 1 and the circuitry 24 connected to the monitor, so as to protect the screen and the circuitry proper from any bending.

Moreover, gaskets 23 are provided, preferably arranged between the screen 20 and the enclosure 19, in order to provide an "Internal Protection" rating equal to IP69K.

In practice it has been found that the described method and system achieve the intended aim and objects. In particular, it has been shown that the system thus conceived allows to overcome the quality limits of the background art.

Clearly, numerous modifications are evident and can be promptly performed by the person skilled in the art without abandoning the scope of protection of the present invention.

For example, although in the present description the electronic device for the transmission of data has been presented mainly as an Ethernet cable, it can comprise an adaptor adapted to receive a plurality of Ethernet cables or cables adapted to supply additional power or an assembling system based on a DIN rail. Moreover, the electronic device can also comprise an interface that supports WiFi or Bluetooth.

Since the system can be supplied in different contexts, it can have different degrees of IP protection. For example, the system in Figure 1 might have an IP67 protection rating on the side where the cylindrical body 14 is present and a protection rating equal to IP69K on the side that faces the screen 1 1.

The system of Figure 1 can be applied also in domestic environments, for example in controlling windows and doors. In this case it might be inserted in a suitable cavity of a wall adapted to receive it, known as socket box.

The system according to the present invention can be further adapted, by means of a convenient choice of materials and of the configuration of the elements that compose it, so as to limit its production costs. For example, the screen 1 1 can be of the resistive type, the enclosure of the cylindrical body 14 can be provided by using plastic material, can be of the multicore type and can contain circuitry for power supply and interfaces for connections of the serial, CAN bus and Ethernet type.

Therefore, the scope of the protection of the claims must not be limited by the illustrations or preferred embodiments shown in the description by way of example, but rather the claims must comprise all the characteristics of patentable novelty that reside in the present invention, including all the characteristics that would be treated as equivalents by the person skilled in the art.

The disclosures in Italian Patent Application no. VR2013A000129, from which this application claims priority, are incorporated herein by reference.

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.