Electronic unit

 

The invention relates to the field of electronic structures of blocks that can be used in miniature transceiver devices and control systems. The technical result is an increase in the density mounting and the simplification of manufacturing technology, is the fact that in the radio block containing flexible curved circuit Board covered with a molding compound, functional assemblies, components and fixation element printed circuit Board, PCB spiral curved around the components placed along the longitudinal axis of the block. While the fixation element is made in the form of console tab on the end of the card, the length and width of which is equal to the length and width of the curved end of the Board. Moreover, the protrusion is preloaded to the end surface of the circuit Board and connected to the terminals of the radio components. 3 Il.

The invention relates to the field of electronic structures of blocks that can be used in miniature transceiver devices.

These electronic units meet high demands for minimum mass, compact, economical technology for their manufacture. With mass production rekonstrukcija electronic unit [1], which is based on a flexible printed circuit Board. On the one hand flexible PCB printed conductors, and the other glued boards with mounted components. Then, the flexible printed circuit Board is bent by 180 so that the card with the radioelements are one against the other and form a package. The distance between the glued boards is determined by the height of the mounted radio parts. Using printed conductors of the flexible printed circuit Board is used to connect within boards and between them. For fixing the circuit Board in a predetermined position applied struts.

The lack of design is that for fixing the flexible circuit Board is applied additionally hard Board and spacers that you want to make, it increases the cost of the unit. And in addition, hard Board and spacers occupy the useful volume of the block.

The closest in technical essence and the achieved effect is the construction of the electronic module [2], in which all the elements (resistors, semiconductor triodes and other) with appropriately cut and bent pins are placed on the plane of the auxiliary card fixing holes so that the conclusions of radioelements in neobnovitelna standard base electronic lamps, is closed by a tubular casing made of plastic and the top is filled with sealant.

The lack of design is that to secure the card, curved in the form of a cylinder before pouring sealant, used the base of an electron tube, which is useful volume of the module and does not allow you to use this space for installation of radio or savings. And manufacture of the cap increases the complexity of manufacturing the electronic module as a whole.

Therefore, this design is time-consuming to manufacture and does not provide a high fill factor volume.

Thus, as shown by the analysis of the technical solutions of known designs of electronic units, they all have significant drawbacks, as they require reinforcement (additional boards, spacers, parts of the cap), which does not bear directly the electrical information, and is useful volume blocks and does not allow them to install additional components or elements, for example, to provide redundancy blocks.

The task of the invention is to increase the density mounting and the simplification of manufacturing technology.

The task is naunton, with functional assemblies, components, and the fixation element printed circuit Board, what's new is that printed circuit Board spiralloops bent around the components placed along the longitudinal axis of the block. While the fixation element is made in the form of console tab on the end of the card, the length and width of which is equal to the length and width of the curved end of the Board. Moreover, the protrusion is preloaded to the end surface of the circuit Board and connected to the terminals of the radio components. This allows you to fill the volume of the unit only switching elements that carry the information.

In Fig.1 shows the construction described electronic unit of Fig.2 - longitudinal section (along a-a in Fig.1), and Fig.3 is a cross section (b-B in Fig.2), where 1 - flexible printed circuit Board, 2 - functional unit, 3 - radiodetal, 4 - compound, 5 - lug, 6 - end of the card, 7 - conclusion parts.

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

On the flexible printed circuit Board 1 will install functional units 2 and 3 components. And parts 3, around which bend the card 1, are placed along the longitudinal axis of the unit for easy formation of the block and dense rounding Board 1 around the radio parts 3 and pre-fix (mount the m on the same subject to bending of the end face 6 of the Board 1. Then charge 1 bend around the casing components 3 and spiraling within the volume of the block, and the tab 5 are bent and presses the end surface 6 a curved Board 1, to connect the shortest path with loose pins 7 3 components. Limb console tab 5 Board 1 provides the connection, for example, oxyamino located conclusions 7 without forming with simple fixation of the free ends of the flexible Board 1. Thus, parts 3 and the flexible printed circuit Board 1 is fixed with each other with formation of a rigid structure and the required form of electronic unit. The width and length of the printing tab 5 is equal to the length and width of its end face 6 a curved Board 1 for high density mounting, as it can additionally be placed as radio components, and the maximum number of printed conductors. In addition, the fixing Board 1 and the performance of the required dimensions of the unit shall be made without the production of additional fastening elements, and at the expense of the Board 1, its console print tab 5, which runs directly to electrical information, and 3 components, and provided a low complexity manufacturing unit, since the protrusion 5 is part of the Board 1. In the prototype is different:

- reduced complexity and cost of manufacturing by eliminating the block valve (the cap), which in the known unit is manufactured separately from the printed circuit Board;

- high density mounting due to the use amount of the missing fittings;

- increased utilization of materials through the use of flexible circuit Board together with purchased components that provided a fixing Board, and a shaping unit;

- possibility of manufacturing unit of any form due to the different layouts of the same components and limb cantilever projection at any angle.

Sources of information

1. The GDR patent No. 115286, class 21A475 (H 05 K 1/14) from 27.11.74, is similar.

2. U.S. patent No. 3889365, CL 29-627 (N 05 To 3/32) from 15.08.73, prototype.

Claims

Electronic unit containing a flexible curved circuit Board covered with a molding compound, functional assemblies, components and fixation element of the PCB, wherein the PCB is a spiral curved around the components placed along the longitudinal axis of the block, and the fixation element is made in the form of console tab on the second surface of the circuit Board and connected to the terminals of the radio components.

 

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