SU871263A1 - Contact clamp - Google Patents

Description

(54) CONTACT CLIP

one

The invention relates to instrumentation, can be used in electronics and electrical engineering, in particular for connecting conductive conductors to measuring devices for fitting, adjusting, testing and other works.

Conductor connection clamps are known, which are two spring-loaded clamping jaws with a flat or shaped profile, and also provided with an elastic element 1. Such clamps are versatile, i.e., they are capable of connecting conductors in a wide range of cross-sectional dimensions. However, these clips have relatively large sizes, small areas of the contact surfaces (points), low strength temporary shear resistance. These factors destabilize the level of transient resistance, which significantly increases measurement errors and quality of work.

Also known is a contact clip, STATUS of a body made in the form of a spring of high rigidity, containing cavities for connecting the conductor and inserting the expansion tool 2. This clip has a simplified design, is small, and provides reliable contact between the mating surfaces.

The disadvantage of this clamping is the need to use an expanding tool, which increases the laboriousness of the connection operation and also limits its applicability with small distances between the conductors, for example, when connecting to fQ output pins of multi-packs of printed wiring. In addition, a high stiffness spring can cause damage (dents) to the surface layer of a connected conductor, which is unacceptable in the presence of silver, gold and other 15 coatings.

Also known contact clip 3, containing made with a longitudinal triangular groove of the rod and covering the clamping spring.

The disadvantages of this device are inadequate operational reliability.

The aim of the invention is to increase operational reliability.

This goal is achieved by the fact that, in a known device, said groove is located on a part of the length of the rod at an angle to its axis, the spring is cylindrical, and the part of the spring that encompasses the section of the rod with the groove is tightly wound, and the turns of the other part are arranged with a gap of one relative to the other.

FIG. 1 shows pin healed with a conductor; in fig. 2 and 3 - sections A-A and BB in FIG. one.

The contact clip consists of a conductive rod 1 and a clamp spring 2. The working part of the clamp is the surface of a triangular groove, covered with a layer of high conductivity metal. The thickening on the rod, made by precipitation, holds the spring in a slightly compressed state.

 connecting the clamp to the conductor, compress the spring 2, thereby opening the groove on the rod 1. Attach the groove surfaces to the conductor 3 and release the spring. At the same time, a part of the spring is tightly wound and transferred to the connected conductor and with its internal diameter will press the contact rod to its surface. To isolate the clamp from possible contact with other conductors, it is advisable to cover its outer surface with an electrically insulating material.

The clamp provides guaranteed contact with the conductor along two lines (multiple points) located on the forming groove. This factor reduces the errors introduced by the transition resistance. In addition, the work of the spring on the seizure of the conductor and the rod increases the strength of the joint temporary shear resistance.

Claims (3)

1. USSR Author's Certificate No. 635544, cl. H 01 R 9/12, 1973. 2. USSR Author's Certificate No. 312333, cl. H 01 R 7/28, 1971. 3. The patent of Germany No. 828563, cl. 21 s21 / 01. 1952.