Расчет упругих элементов в конструкциях электрических соединителей на основе гибких печатных кабелей

Abstract

Приведена методика определения конструктивных параметров элементов разъемных и неразъемных соединителей на основе гибкого печатного кабеля. Решена проблема перехода от единиц измерения твердости, указанных в технических условиях на резины, к величине модуля упругости, который используется при расчетах конструктивных параметров соединителей. Приведены примеры расчета величины сжатия эластомерного вкладыша, необходимой для обеспечения надежного контактирования, при заданной величине переходного сопротивления соединителя.

Наведено методику визначення конструктивних параметрів елементів роз'ємних та нероз'ємних з'єднувачів на основі гнучкого друкованого кабелю. Вирішено проблему переходу від одиниць виміру твердості, зазначених в технічних умовах на гуми, до величини модуля пружності, що використовується при розрахунках конструктивних параметрів з'єднувачів. Наведено приклади розрахунку необхідної для забезпечення надійного контакту величини стиснення еластомірного вкладиша при заданій величині перехідного опору з'єднувача.

In this article we consider the method of constructive parameters calculation of the elastic elements, which are used in electrical connectors of flexible printed cables. Electrical connectors characterized by the fact that the contact pair is needed to provide pressure. It is also important to know the optimum ratio between stability of the contact connection and the necessary value of the transition resistance. These ratios are studied sufficiently for discrete electrical connectors, however for connectors of flexible printed cables this theme is not explored enough. The purpose of this work is to develop methods that will allow to carry out calculations for elastic elements, which provide communication, and to determine the size of case elements for electrical connectors. We consider two types of connectors. First are removable electrical connections where it is necessary to find a compromise between the resistance value and the separating (engaging) force. Second are permanent connections, where counts only the value of the transition resistance. For the first type of connectors were considered a simple form of the liner, in the shape of a rubber block, as in this case, the pressure should be created only by the compression of the liner and fixing it. It is important to get accurate results of the pressure calculation for removable electrical connections, because in this case we consider especial shape of elastomeric liner, which allows to create the pressure not only by compression of the liner, but by deformation it as a spring. For this task, the engaging force was specified on the basis of already known facts. It was important to set the amount of deformation that defines the shape and size of the liner and the case. We solved the problem of transition from the units of measuring hardness, specified in the technical specifications of rubber, to the value of the Young's modulus used in the calculations of constructive parameters of connectors. We got an analytic dependence that can be used to find the Young's modulus for a known value of hardness on a scale Shore A. We gave examples of the amount of compression calculation in the elastomeric liner to provide a reliable contact for specified values of the transition resistance for the removable and permanent connectors based on flexible printed cable.