Stranded wire-type elastic contact pin

Abstract

The invention relates to a stranded wire-type elastic contact pin. The metal wires in a central layer comprises at least two metal wires; the enveloped cross sections of the metal wires of each layer are circular and the metal wires of the adjacent layers are attached tightly; at least one layer of metal wires has the stranding direction opposite to stranding direction of other layers of metal wires; the stranding direction of the outermost layer of metal wires is opposite to that of the adjacent layer of metal wires; the helical angles of the metal wires in the outer layers are less than helical angles of the metal wires in the inner layers; the length of the stranded wire-type elastic contact pin is greater than or equal to the helical pitch of the outermost layer of metal wires; the external diameter D of the maximum fat point is 1.3-1.9 times of the external diameter d of the contact pin; and the fat point span L is 2.2-3.8 times of the external diameter d of the contact pin. According to the invention, the stranded wire-type elastic contact pin has little engaging force so that a multi-core connector can be manually inserted or separated very easily. Therefore, the stranded wire-type elastic contact pin can be used for multi-core connectors.

Description

technical field [0001] The invention relates to stranded wire type elastic pins, in particular to an electrical connector with high reliability, small insertion force, convenient insertion and extraction, and long service life. Background technique [0002] For the twisted wire elastic pin, it is necessary to punch fat between the two ends of the twisted elastic pin to form a "bellied" fat point, and through the elastic deformation of the fat point to match the rigid jack, so that Pairs of contacts that make up an electrical connector. [0003] U.S. Patent US 3,31,9217 discloses a kind of stranded wire elastic pin (see figure 1 ), which increases the second layer of metal wire 87 on the basis of the core metal wire 88, the outer layer of metal wire 86 is opposite to the spiral direction of the second layer of metal wire 87, the outer layer of metal wire 86, the second layer of metal wire 87 and the core metal The two ends of the wire 88 are respectively welded together to ...

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Problems solved by technology

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