Classification of connectors and naming
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As connectors become increasingly diverse and new structures and applications emerge, attempts to solve the classification and naming problem with a fixed model have become difficult to accommodate. Nevertheless, some basic classifications are still valid.
1, the level of interconnection According to the function of the internal and external connection of electronic devices, interconnection (interconnection) can be divided into five levels.
① The internal connection of the chip package
② The connection between the IC package pins and the PCB. Typical connector IC socket.
③ printed circuit and the connection of the wire or printed board. Typical connectors are printed circuit connectors.
④ Base board to base board connection. Typical connectors are cabinet connectors.
⑤ Device to device connection. Typical products are circular connectors.
Levels (iii) and (iv) have some overlap. Among the five levels of connectors, the market volume accounts for a large proportion of the products in the third and fifth levels, while the current fast growth is the products in the third level.
2, the level of connector specifications. According to the International Electrotechnical Commission (IEC) classification, the connector belongs to the electronic equipment with electromechanical components, the specifications of the level of: category (family) example: the connector
Sub-division (sub-family) example: circular connectors Type (type) example: YB type circular connectors Species (style) example: YB3470 specifications (variant)
3, in our industry management, the connector and switches, keyboards, etc. collectively referred to as electrical plug components, and electrical plug components and relays are collectively referred to as electromechanical components.
4, the connector product categories. Connector product type division although some confusion, but from a technical point of view, the connector product category only two basic division approach: ① according to the shape of the structure: round and rectangular (cross-section), ② according to the operating frequency: low frequency and high frequency (to 3MHz as the boundary).
According to the above division, coaxial connectors belong to the circular, printed circuit connectors belong to the rectangular (historically, printed circuit connectors are indeed separated from the rectangular connector to form its own category), and the current popular rectangular connectors whose cross-section is trapezoidal, close to the rectangular. To 3MHz as the boundary to divide the low and high frequencies and radio waves are also basically the same frequency division.
As for other uses, installation methods, special structures, special performance, etc. can also be divided into many different types, and often appear in publications and manufacturer's promotional materials, but generally just to highlight a feature and use, the basic classification is still not beyond the above principles of classification.
Considering the technical development of the connector and the actual situation, from its generality and related technical standards, the connector can be divided into the following categories (subcategories): ① low-frequency circular connectors; ② rectangular connectors; ③ printed circuit connectors; ④ RF connectors; ⑤ fiber optic connectors.
5, the connector model naming. Connector model naming is the basis for customer procurement and manufacturers to organize production. In the connector industry at home and abroad, there are two ideas for product model naming: one is to use the letter code plus the number approach, and strive to reflect the main structural characteristics of the product in the model naming. The advantage of this approach is easy to identify, but the arrangement is too long and too complex, with the miniaturization of the connector, bringing many difficulties to print. This approach is still popular in China, and in some industry standards and even national standards to make provisions, such as SJ2298-83 (printed circuit connectors), SJ2297-83 (rectangular connectors), SJ2459-84 (ribbon cable connector), GB9538-88 (ribbon cable connector), etc.. Due to the increasing diversity of connector structure, in practice with a naming rule to cover a class of connectors is increasingly difficult. Another way of thinking is to use a combination of Arabic numerals. This approach has the advantage of simplicity, easy computer management and small product logo printing. Major international connector manufacturers are currently using this approach. Can be expected to be developed by the manufacturers to reflect their own characteristics of the naming scheme will gradually replace the planned economic system by the entire industry to specify a unified approach to naming rules.
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