ELECTROMECHANICAL DEVICE TO HOUSE ELECTRONIC MODULES

Abstract: Electromechanical device consisting of two parts, which may be interconnected, which can suitably house electronic modules (2, 9) and which can be inserted in telephone exchange distributors. Its build is such that it may take different configurations according to the type of motherboard (i.e. interconnections) used between interface and electronic modules being also of the Europe format DIN-41494.

Description: - l - Electromechanical device to house electronic modules. The innovation presented concerns an electromagnetic device which is meant to accomodate electronic modules. In its preferred form, it may be utilized in low frequency te¬ lephone exchange distributors. It belongs to the field of te¬ lecommunications, in particular to the field of electro- mechanical devices for telecommunications. Till now, electromechanical, structures used to the same end suffered of numerous drawbacks: - they did not have upperandrear motherboards: therefore they did not provide flexibility as a function of different con- figurations; - device expandibility was not possible because no expansion system was provided for (series of vertical and/or hori¬ zontal structures); - the mechanical structure would not allow high dissipation values through natural convection because structures were closed; - they did not use Europe format modules: this limited their utilization and reduced their flexibility. The electromechanical device, which is the object of this innovation is meant to solve the inconveniences reported on previous solutions. Thorugh its original composition it of- fords advantages also in view of devices having different configurations, because Europe format is an internationally recognized standard. In the following, some of the advantages afforded by the pre¬ sent innovation are reported. - Simplified building process, having high reliability due to the absence of wired connections for internal connections. - Very good maintainability features because each part of the device is field replaceable without making use of special equipment (a sample screwdriver is all that is required). - Flexbility of the mechanical structure: e.g., as application and configuration vary, all is needed is to equip devi es with different motherboards leaving the other parts unchan- ged. - Remarkable natural dissipation capacity per unit volume, due to its original cover configuration The present innovation will now be described with reference to one of its forms of implementation, which is preferred at pre- sent and is provided as an illustration, but is not limited to this, and makes reference to the drawings attached, where: Figure 1 shows the removeable block, where: 1 is the L shaped grilled protective removeable cover; 2 is the power supply module; 3 is the expansion system; 4 is the container compartment; 5andl2 are the interface connectors; 6 is the rear printed circuit for module interconnection (mother board) ; 7 motherboard interconnection; 8 captive screw; 9 example of modules contained in the compartment; 10 upper motherboard containing interfaces; 11 fixing device for protective covering 1; 12 mechanical hook-on device to the fixed part. Figure 2 shows the fixed part where: 14 is the fixed panel; 15 area to accomodate interface and power supply interconnec¬ tions; 16 hook-up pivot for the mobile block; 1 aτ_118 fixing accessories. Figure 3 shows, in sequence, the hooking and fixing of the two parts (shown as figs 1 and2 in side elevation). Figure 4 shows details of the interconnection system where: 5 is the interface connector; 6 is the rear motherboard; 9 is a typical module; 10 is the upper motherboard; 19 is the compartment outline. In the following, a way to assemble the structure, object of the present invention, is illustrated: The front (Figure 1) consists of two sides 20 connected by cross elements 21 grooved 22 to host electronic, modules 9,2. To the rear, the printed circuit (motherboard) 6 is fixed to provide module interconnection and has connectors 23 (Figure 4) to accomodate a further motherboard 10 for interconnection towards interface 5. Such front has a protection which may be made of plastic having an L shaped profile, provided with a blocking system which consists of a lock 11, such that, upon removal, it re¬ mains attached to the cover itself. The rear part (Figure 2) consist of a botton 14 having ope¬ nings 15 to accomodate loom wires, equipped with accessories for the fixing to the sorter frame 17, 18. Mating of the two parts ( Fig.1 and 2 ) takes place by vir¬ tue of a hookandturn system 13, 16 and captive screws. It is worth reminding that such connection is illustrated in the sequence shown in Figure 3. The outputs from interface modules 25 (Figure 4) tov/ards the external plant are brought to the back motherboard 6 through connectors 24 and from these, through connectors 23,7 are taken to the top motherboard 10 on which blocks 5 are mounted with wire wrap std connectors towards the external plant (interface) .

Claims: CLAIMS 1. Electromechanical device, which may be preferably inserted in telephone exchanges, characterized by being made of two interconnectable parts (Figs 1 & 2) to house electronic modules 9,2 also responding to DIN 41494 European standard and capable of taking different configurations according to motherboards used. 2. Electromechanical device, as per Claim 1, provided with on L shaped grilled protective cover 1, removeable and pro¬ vided with a captive locking system 11 having at the top extremes suitable shapes for mating with the two blocks (Figures 1 & 2) such as to keep the whole together. 3. Electromechanical device, as per Claim 1, characterized by the fact that in view of different applications, it uses a single suitably shaped, rigid-flexible printed circuit as well as uged boards 6,10. 4. Electromechanical device as per Claim 1, which mounted in seried can give way to an expanded horizontal and/or ver¬ tical network consisting in a basic unit and of satellite sub units, all indipendently onlefaced with the outside world. 5. Electromechanical device, as per Claim 1, where the lock-up of the two blocks takes place through a mate and turn de¬ vice 13 and 16 and locked by screws or such. 6. Electromagnetic, device, as per Claim 1, which uses as interconnection element 5) towards the outside, a modular block provided with terminals, having such an inclination as to allow use of standard too3s for wire wrapped connec¬ tions. 7. Electromechanical device, as per Claim 1, where modular block 5 may be inserted in a normal printed circuit. 8. Electromechanical device, as per previous Claims, such that mating of parts of same or different materials may be made through ultrasonic, reveting. 9. Electromechanical device as shovm in the description above and in the drawings attached as also any part there of in isolation as in combination.

Inventors: PERCHIAZZI MICHELE, VOLPE FULVIO, PERCHIAZZI, MICHELE, VOLPE, FULVIO
Applicants: SELENIA IND ELETTRONICHE, SELENIA INDUSTRIE ELETTRONICHE ASSOCIATE S.P.A.
Application year: 1985
Main classification: H05K5
IPC codes: H05K7