What is rubber connectors?

- Mar 11, 2020-

Rubber connectors are a type of connector developed to adapt to micro-devices, and are used for the electrical connection between high-density dual-row terminal packages such as electronic watches liquid crystal displays and integrated circuits and printed circuit boards.


Used for

Electronic watch LCD display



Various types of pressure-sensitive conductive rubber



Very high density and good compliance


table of Contents

1 Overview

2 categories

Overview of this paragraph

It is a type of connector developed to adapt to miniature devices. It is used for the electrical connection between high-density dual-row terminal packages such as liquid crystal displays and integrated circuits of electronic watches and printed circuit boards.


Rubber connectors can be classified into non-conductive rubber, conductive rubber, and pressure-sensitive conductive rubber.



Folding 1. A connector using non-conductive rubber

A type of connector using non-conductive rubber-a rubber rod as thin as a pencil lead is wrapped around a flexible film with micro-metallized parallel wires. Such two elastic thin sticks are placed on the two sides of the double-row lead-out package, placed on a printed circuit board, and pressed and fixed, and the two rows of the device are paralleled by micro-metallized parallel lines used as contacts. The lead-out wires are connected to the corresponding lines on the board one by one.


Folded 2. The conductive rubber and the non-conductive rubber are overlapped.

A type of connector made by overlapping conductive rubber and non-conductive rubber-this connector uses the center distance of the lead wires of the double-row lead-out package to alternate the conductive rubber sheet and non-conductive rubber sheet with the corresponding thickness. Superimposed and bonded into multiple layers of rubber blocks, and cut into rubber rods of the size described in Type 1. It uses each conductive rubber layer as a contact body. Its usage is the same as Type 1.


Fold 3. Conductive rubber connector

Another type of conductive rubber connector-a small conductive rubber button (like a double-headed rivet) as the contact body, which is embedded one by one in each through hole of the two long sides of the rectangular plastic frame in. When in use, place the two-row lead-out packaged devices on a rectangular frame, align the two-row lead-outs of the device with the two-row elastic contacts on the frame, and mount the connector with the device on the printed board. Circuit board; finally, a gland is added to fix it. In this way, each lead wire on the device and each printed wire on the board are connected by one conductive rubber button.


Fold 4. Pressure-sensitive rubber connector

Pressure-sensitive rubber connectors, shaped like a gasket, are about 0.4 mm thick. When this kind of connector is sandwiched between the device and the printed circuit board, only slight pressure exerted by the screen printing or plating on the substrate and the thin height of the wiring on the board can lead to The metal particles in the metal-filled rubber gasket are rearranged, so that a conductive path is formed in a direction perpendicular to the connection surface, and insulation is formed between adjacent device lead-outs on the left, right, and diagonal lines, and on-board wiring .


The common characteristics of the above-mentioned various rubber connectors are extremely high density, good compliance (without strict requirements for dimensional accuracy), airtightness, resistance to shock and vibration, and so on.