RU2771978C1 - Method for mechanical coding of subracks and associated insetion pieces - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and instrumentation, can be used in the design of subracks and associated insertion pieces. The expected result is achieved by the fact that on the printed circuit boards of the insertion pieces at the edges of the PCB connector, keys are made, which are projections in the form of a rectangular parallelepiped. On the backplane, matching holes are made for these rectangular keys with a length and width identical to the length and width of the keys of the insertion piece. The locations of the matching holes are selected with the possibility of keys entering when installing the insertion piece into the opening intended for it formed by the upper and lower guides on the backplane. At the same time, the height of all keys is the same and exceeds the maximum height of the connectors located on the backplane and on the printed circuit boards of the insertion pieces by at least 1 mm.

EFFECT: ensuring simplicity, lightness, as well as increase in the reliability of the method for mechanical coding of subracks and associated insertion pieces, which in turn will ensure error-free positioning of insertion pieces in the openings of subracks during installation and will reduce the amount of damage to both connectors and the subracks themselves and associated insertion pieces.

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Description

The present invention relates to the field of electrical engineering and instrumentation, can be used in the design of block frames and associated plug-in blocks to ensure quick, simple installation of the internal parts of devices without damaging the mounted parts of the devices and without positioning errors.

Hereinafter, the terms are used in accordance with GOST R IEC 60297-3-101-2006.

With the current level of development of radio electronic technology, the issue of quick and safe replacement of failed plug-in units connected to the backplane is an important component of technical excellence and commercial success of the product. In order to avoid positioning errors of plug-in units in subracks, there are various technical solutions, one of which is the mechanical coding system. Mechanical coding avoids damage to the backplane, which can occur if, for example, a service technician accidentally installs a plug-in unit in an unsuitable opening. Indeed, if the backplane does not provide redundancy, and not only the electronics of the plug-in module, but also the backplane connector is damaged, the entire system will need to be replaced, and this will entail a simple - a serious problem for the operating organization and equipment users.

Known technical solution - a key system, regulated by the standard GOST R IEC 60297-3-103-2006, which is a method of mechanical coding plug-in blocks and block frames (prototype). A schematic representation of the key system in the block frame and plug-in blocks is shown in figure 1, where:

1 - typical plug-in printed circuit board;

2 - key installed on the plug-in block;

3 - key mounted on a block frame;

4 - typical guide.

Components for the implementation of this method are produced by different companies, for example, Heitec (access mode: https://www.rittal.com/ru-ru/content/ru/produkte/heitec_1/heitec_1.jsp, accessed July 2021). To implement this technical solution, the keys (access mode: https://elektronik.heitec.de/en/packaging/components-accessories/guide-rails/keys, accessed July 2021) are inserted into slots on the insert block, at of this particular manufacturer into the injector-extractor handle (Accessed: https://elektronik.heitec.de/en/packaging/components-accessories/front-panels-handles/handle-type-iv, accessed July 2021) and subframe, in this case coded subframe guides (access mode: https://elektronik.heitec.de/en/packaging/components-accessories/guide-rails/keyable-guide-rails-plastic, accessed July 2021 G.). Thus, the plug-in block is fully plugged into the backplane only if the combination of keys on the block guide and the plug-in block match, which only happens if the block is installed in the correct opening.

The disadvantage of this technical solution is its high complexity, because when using it, it is necessary to complete each radio-electronic unit with special encoded guides, keys. You will also need a special tool to install the keys.

The technical problem of the present invention is the need to overcome the technical disadvantages inherent in the analog, namely, the creation of a simple, easy and reliable method for mechanical coding of block frames and associated plug-in blocks, which allows the installation of plug-in blocks in block frames without errors and without damage to both connectors and plug-in blocks. and the mounted elements themselves.

The technical results of the claimed invention consist in providing simplicity, ease, and also increasing the reliability of the method of mechanical coding of block frames and associated plug-in blocks, which in turn will ensure error-free positioning of plug-in blocks in the openings of block frames during installation and will reduce the number of damages as connectors, as well as the block frames themselves and the plug-in blocks associated with them.

The technical results of the invention are achieved by the fact that the printed circuit boards of the plug-in blocks are provided with keys, which are protrusions of a certain geometric shape and size. On the backplane there are reciprocal holes for these keys. Moreover, the geometric shape and dimensions (length and width) of the corresponding counter holes on the backplane are identical to the shape and dimensions (length and width) of the plug-in block keys, and their locations are chosen so that the keys will enter the mating holes only if the plug-in block install in the opening intended for it. In this case, the height of the keys is chosen in such a way that it is at least 1 mm greater than the height of the connectors located on the backplane and on the printed circuit boards of the plug-in blocks, which makes it possible to protect the connectors from damage due to incorrect positioning, preventing their joining.

Thus, by varying the number of keys and reciprocal holes, their location and geometric shape, it is possible to set the number of combinations of mechanical encoding, tending to infinity, without the use of additional purchased elements (simplification and ease of the encoding method).

In FIG. 2 shows a block of the modular design of the device, the installation of which is carried out using the method of mechanical coding of block frames and associated plug-in blocks, where:

5 - block frame;

6 - guides;

7 - plug-in block;

8 - keys of the printed circuit board of the plug-in block;

9 - reciprocal holes for keys on the backplane;

10 - backplane.

The description of the invention can be used as an example for a better understanding of its essence and is set out with reference to the figure attached to the present description. However, the following details are intended not to limit the essence of the invention, but to make it more clear.

Consider the implementation of the proposed method on the example of the implementation of the method of mechanical coding of block frames and associated plug-in blocks in the device "Sensor signal concentrator".

To perform mechanical coding of the block frame (5) and the plug-in block (7) associated with it, on the plug-in block (7) on the end side, along the edges of the printed circuit board connector, the keys of the plug-in block (8) printed circuit board are made, which are rectangular protrusions. Each ledge of a rectangular shape has a length, width and height, and the length and width of the keys are different, and the height of all the keys is the same.

Mating holes for keys (9) are made on the backplane 10, and their shape is identical to the shape of the corresponding keys (8). The dimensions of the reciprocal holes (9) (length and width) are also identical to the dimensions of the corresponding keys (8). The keys of the printed circuit board of the plug-in unit (8) and the key holes on the backplane (9) are arranged in such a way that the keys (8) will only fit into the mating holes (9) if the plug-in unit (7) is installed in the slot intended for it is an opening formed by the upper and lower guides (6) on the backplane (10). At the same time, the height of the keys (8) is greater than the height of the connectors located on the backplane and on the printed circuit boards of plug-in units by at least 1 mm, which makes it possible to protect the connectors from damage due to incorrect positioning, preventing their docking.

The length and width of the keys varies, and the height is selected based on the height of the connectors located on the backplane and on the printed circuit boards of the plug-in units - more than the largest of these heights by at least 1 mm. Mating holes on the backplane are made through.

When installing the insert block (7) in the block frame (5), it is guided between the upper and lower guides (6), i.e. installed in the opening. With proper positioning, i.e. if the opening is selected correctly, the keys of the printed circuit board of the plug-in unit (8) fall into the mating holes on the backplane (9), and the connectors are mated. When the plug-in block (7) is installed in an incorrect opening, the keys of the printed circuit board of the plug-in block (8) abut against the body of the backplane (10), preventing the connectors from mating and, accordingly, preventing the plug-in block from being incorrectly positioned in the block frame.

Ensuring simplicity, ease, and also increasing the reliability of the method of mechanical coding of block frames and associated plug-in blocks is achieved by the fact that the printed circuit boards of the plug-in blocks are provided with keys, which are protrusions of a certain geometric shape and size; on the backplane there are reciprocal holes for these keys. Moreover, the geometric shape and dimensions (length and width) of the corresponding counter holes on the backplane are identical to the shape and dimensions (length and width) of the plug-in block keys, and their locations are chosen so that the keys will enter the mating holes only if the plug-in block install in the opening intended for it. In this case, the height of the keys is chosen in such a way that it is at least 1 mm greater than the height of the connectors located on the backplane and on the printed circuit boards of the plug-in blocks, which makes it possible to protect the connectors from damage due to incorrect positioning, preventing their joining.

Claims (1)

A method for mechanical coding of block frames and associated plug-in blocks, which consists in the fact that keys are made on the printed circuit boards of the plug-in blocks along the edges of the printed circuit board connector, which are ledges in the form of a rectangular parallelepiped, counter holes are made on the backplane for these rectangular keys with a length and width identical to the length and width of the keys of the plug-in block, the locations of the reciprocal holes are selected so that the keys can enter when the plug-in block is installed in the opening intended for it, formed by the upper and lower guides on the backplane, while the height of all keys is the same and exceeds the largest the height of the connectors located on the backplane and on the printed circuit boards of the plug-in units, by at least 1 mm.

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