Compared with the outer conductor, the inner conductor with small size and poor strength is more likely to cause poor contact, leading to connector connection failure.
Most of the inner conductors of connectors use elastic connection, such as spring claw type elastic connection, socket slot type elastic connection, bellows type elastic connection, etc.Among them, the socket slotted elastic connection has the advantages of simple structure, low processing cost, convenient assembly and the most extensive application.
Two reasons for connector connection failure:
1. The inner conductor of the connector is not fixed firmly:
For assembly purposes, in many connector structures, the inner conductor is split in two by the dielectric support, which is then threaded together.
However, due to the small diameter of the inner conductor, if the thread connection is not fixed with glue during assembly, then the inner conductor connection strength is very poor, especially some small connectors in multiple connections and disconnects, under the long-term action of torsion and tension, the inner conductor thread may be loose and fall off, resulting in connection failure.
Modification method: suitable amount of conductive adhesive or thread locking agent can be applied to the thread connection to increase the reliability of the thread connection.
2. The size of the socket or pin of the inner conductor of the connector is incorrect:
If the diameter of the conductor in the jack is less than the specified size, then when the pin of the conductor in the jack enters the jack, the jack will expand excessively, and the shape variable will exceed its elastic deformation range, resulting in plastic deformation, which leads to the damage of the conductor in the jack.
On the contrary, if the diameter of the pin is too small, when the pin and the jack cooperate, the gap between the pin and the jack wall is too large, the two inner conductors of the connector can not be in close contact, the contact resistance increases, the electrical performance index of the connector will be very poor, leading to the occurrence of connection failure.
Improvement method: whether the fit of the jack and the pin is reasonable, we can use the size of the insertion force and the holding force when the pin and the conductor in the jack fit in the standard gauge to measure.