Radio-electronic block

FIELD: electronics.

SUBSTANCE: device has electronic boards block with radio-elements thereon and with radial grooves made in them, electric connectors of electronic boards and arc shields separating boards with sockets for bodies of radio-elements, connected to electronic boards by frame fixing, central bushing and rods. Along peripheral line of each arc shield slits are made, combined with radial grooves of each electronic board. Electric connectors of boards are made in form of shields curved around side surface for console portions of boards, current-conducting drawing of which is made in form of circular sectors, positioned between shields slits.

EFFECT: higher resistance to physical impact.

2 dwg

 

The invention relates to the field of electronic structures of blocks that can be used in artillery managed shells (UAS), as well as in anti-tank complexes (ATGM) or anti-aircraft guided missiles (SAMS). In modern UAS, missile, missiles electronic blocks are widely used (for example, in the national complex "Competition", "cornet" and foreign "TOU", "Copperhead").

To electronic blocks high demands on reliability, durability, minimal mass, small material consumption, economical technology for their production.

The famous design of the electronic unit [1], consisting of a package of printed circuit boards. These boards are parallel to each other at a fixed distance by means of hollow spacer sleeves, through which pass the screws, tightening the whole package of cards in a single unit. Lowest fee package has bushings threaded for tightening screws securing the entire package boards at the installation location. Along one (preferably longitudinal) edges of each printed circuit Board bottom is attached the relevant part of insulating material, which serves at the same time the spacer piece between boards and for fixing the flexible flat cable connecting all cards. In addition, all of these Sucromat cards are tape U-shaped spring, in which, after removing the screws, tightening the package card, you can the entire package to open like a book and get a good access to each Board.

The lack of design is that the electronic unit has no strength when exposed to significant congestion that lead to the deflection circuit boards, cracking the dielectric substrate and the edge of the printed tokoprovodnikami as card based local plane on a separate sleeve, with all the plane boards, bearing elements, not fixed. And the gap between the plates defined by the sleeves, allowing these cards to vibrate together with the radioelements. Also does not provide the rigidity boards and relevant detail, as the latter establishes only along their longitudinal edges, and not on the entire surface of boards. In addition, cables and springs increase the weight of the block, thereby resulting in shock, mechanical stress increase, which leads to the destruction of printed circuit boards.

Known also design electronic unit [2], which is based on the flexible printed circuit Board. On the one hand flexible Board marked traces, and on the other, pasted boards with mounted radio. Then, the flexible printed circuit Board is bent at 180° so that the card with the radioelements are od is and against the other and form a package, the distance between the glued boards is determined by the height set on them radioelements. Using printed conductors of the flexible printed circuit Board are carried out within boards and between them. For fixing the circuit Board in a predetermined position applied spacer (bushing).

The advantage of this design is that one flexible printed circuit Board provides electrical connection between elements located on a separate auxiliary boards and between boards. However, the application of this design radioelectrical block in the rocket or projectile, starting with expelling charge, it is not possible because of the low impact strength, as spacers, holding the card in a small space, do not provide the required rigidity.

Additionally it should be noted that the electronic unit in the rocket, as a rule, it is complicated because it performs many functions and consists of a large number of densely Packed radio components and printed circuit boards, as the volume of missiles is limited. And such a dense placement of radioactive elements and printed circuit boards leads when the coating unit, for example, molding resin to the failure to complete (neprotivo) resin in the entire volume of the block. Formed shell inside a block, in which the radioactive elements, especially small, are not fixed by the resin and not who provides them strength.

In addition, completely encapsulated unit complex in setting up, testing, repair.

Closest to the proposed electronic unit in a structural sense, is an electronic block [3], contains a package of printed circuit boards with radio, billboards, separating the circuit Board and connected with them by framing fasteners and rods. Shields made in the form of prestressed in the direction opposite to the action of the overload arches with a Central hole and nests made on the convex surfaces of the arches and designed to install with glue buildings of the radioelements. And in the boards between terminals a radial grooves and a Central hole coaxial with the hole in the arches. And framing the mount is equipped with a sleeve disposed in the Central hole of the arches and boards. The electrical connection between the boards is made as conclusions of radio, and a separate harness.

The lack of design is that the individual wires of the harness are attached when mounted to a PCB with a sufficient margin to avoid breakage due to tensions arising, for example, by thermal Cycling. This stock reduces the strength of the connection when moving the unit with great acceleration and can lead to breakage of the wires. As additional measures to consolidate wires the harness increase the volume of the block, mass, and consequently, increases the mechanical stress on the components.

In addition, it took strengthen the capacity of the lifting charge to increase the distance of flight of the projectile, and this caused the increase in congestion from 10000 to 12000 g g, and is known for the design of the electronic unit has failed to meet the strength characteristics.

The task of the invention is to increase the strength by improving the damping properties preserving maintainability separate boards and volume of the block.

This object is achieved in that the electronic unit containing a package of printed circuit boards placed on them by the radioelements and with radial grooves, electrical connectors, printed circuit boards and separating the PCB arched panels with slots for housing radioactive elements connected to the circuit boards framing fastening, a Central sleeve and the rod, what's new is that on the periphery of each arched panel is made cuts, combined with the radial grooves of each of the PCB. And connectors printed circuit boards made in the form of curved around the side of the boards cantilever segments of the printed circuit Board, a conductive pattern which is executed in the form of circular sectors located between the slots of the boards. This has allowed the em with good strength of mechanical parts and insufficient strength of electrical connectors and printed circuit boards, and to increase the strength of the unit as a whole while preserving maintainability of individual printed circuit boards with specific functional properties and without increasing the volume of the box due to redistribution of stresses from boards with radio components and circuit boards in place of the reduced stiffness of the panels (without radioactive elements in the grooves, but sufficient to prevent from destruction.

1 shows a General view of the construction described electronic unit, figure 2 - cross section (along a-a in figure 1), where 1 - shield 2 - PCB, 3 - radioelement, 4 - slot 5 - slot 6 - console segment, 7 - figure from tokoprovodnikami, 8 - part circular ring, 9 - pin,10 - frame mount, 11 - Bush.

The proposed design of the electronic unit is made as follows.

On concave surfaces, made in the form of arches boards 1 are flexible printed circuit Board 2. On the convex surfaces of the panels 1, aimed in the direction of flight of the rocket placed with glue body elements 3, the conclusions of which is connected with the printed circuit boards 2.

In printed circuit boards 2 a radial grooves 4, and shields, 1 slots 5, which are aligned with the grooves 4 boards 2. To ensure electrical the links between elements 3 in the printed circuit boards 2 is protruding cantilever segments 6 of the circuit Board 2, the sides are limited by the grooves 4. On the console sections 6 figure from tokoprovodnikami 7 made in the form of parts of a circular ring 8. Cantilever segments 6 are curved around the boards 1 and pinched them free ends of the panels 1 and 2 cards, which is an electrical connection, with a circular ring 8 cantilever segments 6 are connected with tokoprovodnikami 7 boards 2 and contact the stronger, the more overload. Shields 1 boards 2 and radio 3, assembled in the package, sealed at the edges of the rods 9 and the frame mount 10, and in the center of the block sleeve 11.

The proposed design of the electronic unit operates as follows.

When exposed to a block of large accelerations within a short period of time, the boards 1 in the grooves 5 are as springs. The ends of the panels 1, which SAG from the load, shift the cantilever segments 6 and the circular ring 8 made by the same method as the tokoprovodnikami 7, with friction on the surface of tokoprovodnikami 7 boards 2, and thereby repay the impact energy.

In addition, the area of the parts of the circular rings 8 and more space to interact with them dacoromania 7, so no tolerance for their manufacture, nor bend or offset relative to each other will not break the electrical connection, which is made simple means.

The proposed design radioed the trip unit compared to the prototype is different:

- improved impact strength due to the presence of slits in the boards, which allow the whole structure with a significant impact, at the time of launch of the projectile, (to sink) in the direction of action of the overload, and by moving to the periphery of the block of parts of panels separated by slots and weakened them. I.e. these parts in the panels formed by radial slots, Flex and are a kind of damper (shock absorber) of the entire block, absorbing the impact energy, thus decreasing the amplitude of the deflection boards and boards in locations of radioelements in excess of a predetermined value;

- adaptability ensuring maintainability, simplicity of design and low weight due to not introducing additional parts and materials.

- considerable strength, especially when using electronic blocks in a supersonic missiles, rotating at high angular velocity, due to the fact that additional mechanical stresses arising from the Coriolis acceleration, perpendicular to the walls of the rocket body, draw a circular sectors to tokoprovodnikami printed circuit boards, because the mass of the arched panels greater than the mass of the cantilever segments of printed circuit boards. In this case, rotation of the cantilever sections from the effects of the angular velocity of the rocket does not divide the conductive pattern with a circular behold the torus.

Sources of information

1. U.S. patent No. 3376479, N. CL. 317-101 from 30.04.65,, similar.

2. The GDR patent No. 115286, N. CL. 21475 (N 05 To 1/14) from 27.11.74,, similar.

3. The application of the Russian Federation No. 2001129646, N 05 To 1/00, 1/02, 7/02, 7/06, 5/00 from 1.11.2001, the prototype.

Electronic unit containing a package of printed circuit boards placed on them by the radioelements and with radial grooves, electrical connectors, printed circuit boards and separating the PCB arched panels with slots for housing radioactive elements connected to the circuit boards framing fastening, a Central sleeve and the rod, characterized in that the periphery of each arched panel is made cuts, combined with radial slots each printed circuit boards and electrical connectors, printed circuit boards made in the form of curved around the side of the boards cantilever segments of the printed circuit Board, a conductive pattern which is executed in the form of circular sectors located between the slots of the boards.



 

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