Aviation plug, also known as aviation plug, is a professional connector derived from military industry. The circuit interconnection can be realized through the elastic contact between the elastic contact of the female head and the rigid contact of the male seat. The elastic contact structure of female head mainly includes:
1、 Cantilever jack:
Cantilever jack is also called cluster type multi elastic contact jack. Its main structural form is to open 2-8 evenly split grooves at the contact end of the cylindrical jack, that is, split. The split is closed to the center by mechanical method to make it reach the specified contact positive pressure or separation force. It is usually used in high current situations.
2、 Wire spring jack:
The structural form of wire spring jack is to fix the wire spring assembly in the contact body through rolling mechanical connection in the cylindrical jack. It is characterized by soft plugging force, small contact resistance and high mechanical life. Generally, 5 or more beryllium bronze springs are uniformly distributed on the inner wall of the inner sleeve with an included angle axis of 15 °, and drum shaped double curved contact surfaces are formed. These double curved contact surfaces fully contact with the working surface of the contact pin to realize the transmission of electrical signals. The wire spring jack is difficult to meet due to its structural characteristics φ The small jack below 0.40 is made, and it is not applicable to high-density or ultra-high density aviation plugs.
3、 Crown spring jack:
The main structural form of the crown spring jack is to put a beryllium bronze crown spring reed into the cylindrical jack. The shape of the reed is a circular arc bending cylinder from the middle to the inside. There is a circular groove in the hole cavity at the front end of the cylinder. The reed is fixed in the circular groove by using its own outward elastic force. Crown spring jack is widely used in high current occasions due to its large contact area with the contact pin, soft insertion and extraction force, small soft contact resistance and high mechanical points (contact life of more than 1000 times). The structure and process of the crown spring jack are relatively simple. Now, the application of small contacts is gradually increasing, and there is a trend to replace the wire spring jack.
4、 Claw spring jack:
Claw spring jack is composed of jack base and claw spring spring. The jack base is cylindrical. Claw spring is installed in the contact port. The spring can be fixed in the cylinder with its own elasticity or forced into the cylinder. The spring force of the spring depends on the width, number, arc size and spring material of the elastic claw. It is characterized by many contact points, soft plug and pull, and high mechanical life. It is widely used in aviation plugs of small and medium-sized connectors. It is suitable for φ 0.40mm- φ The contact life of 3mm jack can reach more than 1000 times.
5、 Torsion spring jack:
The main structure of the torsion spring jack is in the cylindrical jack. The reeds are arranged in equal parts longitudinally and twisted in the form of a hyperboloid. The reeds are almost perfectly round, and the reeds are fixed on the copper sleeve. The copper sleeve and the reeds are pressed into the cylindrical jack together. Its feature is that compared with other jack structures, it has more contact points, and the insertion and extraction are very soft. When it is connected with the pin, The increasing cross contact points will reduce the arc and voltage drop generated by point contact. The whole structure is stable and elastic, and the dynamic contact resistance is very low. The consequent benefit is that the temperature rise is very low, which is widely used in high current connector products, such as the main input and output connectors of new energy vehicles.
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