Connector Supplier's View on Connector Design 2

Author：Danny / time：2019-01-02 / The number of clicks：906

   The following is a description of the solder foot, plastic and size requirements when designing the connector. It is hoped that consumers will have a better understanding of the design provided by the connector supplier.

   First, the design of the connector solder foot. In order to eliminate the phenomenon of the seesaw and ensure the coplanarity of the terminals, the solder foot is exposed to the bottom of the plastic, which is generally 0.05 mm. The solder foot and the surrounding plastic should retain a certain sized gap, in order to prevent the occurrence of the phenomenon of climbing tin and cause a short circuit. As for the design of the tape, it is necessary to consider the effects on stamping, plating, assembly and cost. The connector supplier considers the idea of stamping, plating and assembly in this regard. If the connector is susceptible to squeezing when packaged, then we need to add a protective foot to prevent the terminal from deforming.

   Second, Connector manufacturers place great emphasis on connector plastic design because the role of the plastic is to secure the terminals and maintain insulation between the terminals. Because of limitation in the plastic material filling performance, the thickness of the plastic wall is generally above 0.2mm, otherwise it will be more difficult to fill. If the area of the thickness is too large, then the phenomenon of insufficient film will easily occur. Once this phenomenon occurs, the terminal will likely be short-circuited. Since the insulation resistance and piezoelectric resistance of the connector are mainly determined by the thickness of the plastic material between the terminals, when evaluating the connector supplier should consider the sliding condition between the plastic part structures. As such we need to focus on reducing unnecessary slider usage when designing. 

   Third, the connector size mark is very important, because whether for the production of connectors or connector improvements, even when connector manufacturers choose connectors, it is be an important reference. So how should measurements indicate the appropriate amount of disparity with tolerance values? This is not set by the designer or the mark person. The standard value must be set according to the product function requirements. For the finished product, the key dimensions generally include the contact height of the terminal, the height of the card, the surface supply, etc. Of course, if the customer has special requirements, it also needs to be noted. At the same time, the connector supplier also needs to consider factors such as assembly, electroplating, and automatic machine production.