注意造成连接器连接失效的两个原因! Note two causes of connector connection failure!

连接器的内导体相对于外导体来说,尺寸较小且强度较差的内导体更容易造成接触不良,导致连接器连接失效。


连接器的内导体之间大多采用弹性连接方式,例如:弹簧爪式弹性连接、插孔开槽式弹性连接、波纹管式弹性连接等。其中插孔开槽式弹性连接结构简单,加工成本低,装配比较方便,应用范围最为广泛。

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造成连接器连接失效的两个原因:


1、连接器内导体固定不牢:

为了装配需要,在很多连接器的结构是内导体被在介质支撑处分为两截,然后用螺纹连接起来。


但是由于内导体直径较小,装配时如果不在螺纹连接处涂胶加以固定,那么内导体连接强度是很差的,尤其是一些小型连接器在多次连接和断开时,在扭力和拉力长期作用下,内导体螺纹可能就会松动脱落,从而导致连接失效。


改进方法:连接器装配时可在螺纹连接处涂适量的导电胶或螺纹锁固剂以增加螺纹连接的可靠性。


2、连接器内导体的插孔或插针尺寸不正确:

如果插孔内导体孔径小于规定尺寸,那么当插针内导体的插针进入插孔时就会使得插孔过度扩张,形变量超出其弹性形变范围,产生塑性变形,导致插孔内导体损坏。


相反,如果插针直径过小,当插针和插孔配合时,插针与插孔壁之间的间隙过大,连接器的两个内导体不能紧密接触,接触电阻变大,连接器的电气性能指标也会很差,从而导致连接失效的现象发生。


改进方法:插孔和插针的配合是否合理,我们可以利用标准规插针和插孔内导体配合时的插入力和保持力的大小来进行衡量。

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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.


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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.

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