TWI452770B - Electrical contact - Google Patents

Description

Electrical connector terminal

The present invention relates to an electrical connector terminal, and more particularly to an audio connector terminal.

Generally, the surface of the electrical connector terminals is plated, mainly to improve the corrosion resistance and contact stability of the electrical connector terminals. The plating layer generally comprises a nickel layer for filling the substrate and a corrosion-resistant metal layer covering the surface, and the metal layer may be a gold layer or a gold-palladium alloy layer. At the same time, the electrical connector terminals will be scratched and elastically deformed, and they are also required to have certain wear resistance and toughness.

Therefore, it is necessary to design a new electrical connector terminal to overcome the above problems.

It is an object of the present invention to provide an electrical connector terminal that has a certain degree of toughness and corrosion resistance.

To achieve the foregoing objective, the present invention provides an electrical connector terminal that is fixed to an electrical connector. The electrical connector terminal includes a connecting portion, a holding portion that connects the connecting portion at one end, and extends from the other end of the holding portion. The elastic portion is for fixing the electrical connector terminal to the electrical connector, and the elastic portion has a contact portion for abutting, and the surface of the electrical connector terminal is plated with nickel plating layer and nickel sulfamate from the inside to the outside. Plating and phosphorous nickel plating.

Another technical solution is: an electrical connector terminal made of metal sheet, electrical connection The surface of the connector terminal is plated with a nickel plating layer, a nickel sulfamate plating layer and a phosphorous nickel plating layer from the inside to the outside.

Compared with the prior art, the electrical connector terminal of the present invention has the following effects: nickel sulfamate plating and phosphorous nickel plating ensure the electrical connector terminals have certain toughness and corrosion resistance.

100‧‧‧Electrical connector terminals

10‧‧‧Connecting Department

11‧‧‧ base

12‧‧‧welding block

121‧‧‧welding surface

20‧‧‧ Holding Department

21‧‧‧ Body Department

22‧‧‧Bending

30‧‧‧Flexible Department

31‧‧‧Arc

32‧‧‧Flexible arm

33‧‧‧Contact arm

331‧‧‧Contacts

41‧‧‧Steps

42‧‧‧Steps

43‧‧‧Steps

44‧‧‧Steps

45‧‧‧Steps

46‧‧‧Steps

47‧‧‧Steps

51‧‧‧ Nickel plating

52‧‧‧ Nickel sulfamate coating

53‧‧‧Phosphorus nickel plating

BRIEF DESCRIPTION OF THE DRAWINGS The first drawing is a perspective view of a terminal of an electrical connector of the present invention; the second drawing is a schematic view of a portion of a terminal of an electrical connector, showing only one side of the plating; and the third drawing is a flow chart of the terminal plating of the electrical connector of the present invention.

The first, second and third figures disclose an electrical connector terminal 100 of the present invention and a method of fabricating the same. In this embodiment, the electrical connector terminal 100 is an audio connector terminal that is made of sheet metal.

Referring to the first figure, the electrical connector terminal 100 includes a connecting portion 10, a holding portion 20 that connects the connecting portion at one end, and an elastic portion 30 that extends from the other end of the holding portion. The holding portion 20 is used for fixing the electrical connector terminal to the electrical connection. The elastic portion 30 has a contact portion 331 for abutting.

The holding portion 20 has a flat shape, and both sides are provided with barbs held by a body (not shown) of the electrical connector. The holding portion 20 includes a body portion 21 and a bent portion 22 that connects the connecting portions, and the bent portion 22 has a small width and an "L" shape.

The connecting portion 10 is for fixing the electrical connector terminal 100 to a printed circuit board (not shown), and the fixing manner may be elastic abutment or welding. In this embodiment, the welding side is used. The connecting portion is the welded portion. The connecting portion 10 includes a base portion 11 extending from the bent portion and a solder bump 12 at the center of the base portion. The solder bump 12 is stamped from the base, the solder bump also has a solder face 121 protruding from a surface of the base, and the solder bump 12 is used to solder the electrical connector terminal to the printed circuit board.

The elastic portion 30 includes a semi-circular arc portion 31 extending from the retaining portion, and the elastic arm 32 extending from the arc portion 31 toward the connecting portion 10 and parallel to the retaining portion 20 and the self-elastic arm 32 extending obliquely and away from the retaining portion The contact arm 33 of the portion 20 has a contact portion 331 formed on the surface of the contact arm 33. The contact portion 331 has a hemispherical protrusion shape, and cooperates with a mating plug (not shown) to form an electrical connection.

The electroplating process is performed on the electrical connector terminal. Referring specifically to the third figure, the process mainly includes the following steps: Step 41, discharging, preparing the material strip, and connecting a plurality of electrical connector terminals to the material strip; Step 42, deesterifying, removing the dirt on the strip; step 43, pickling, cleaning the strip to remove the surface oxide layer; step 44, plating nickel, immersing the entire electrical connector terminal in the bath (the following plating method) Also the same), that is, a surface of the entire electrical connector terminal is plated with a nickel plating layer 51 having a thickness of 0.2 to 2 um to reduce the surface roughness of the terminal; and step 45, nickel sulfamate is applied throughout the terminal of the electrical connector. The surface is plated with a nickel sulfamate plating layer 52, that is, the nickel sulfamate plating layer 52 covers the nickel plating layer 51, and has a thickness of 0.2 to 2 um to improve the toughness of the plating layer; and step 46, phosphorus-plated nickel is applied throughout the electrical connector. The surface of the terminal is plated with a phosphorous nickel plating layer 53, that is, the phosphorous nickel plating layer 53 is coated on the nickel sulfamate plating layer 52, and the phosphorous nickel plating layer has a phosphorus content of 5% to 9%, which is favorable for improving the corrosion resistance of the terminal; , receiving materials.

Referring to the second figure, through the above plating process, the entire electrical connector terminal 100 is sequentially arranged with a nickel plating layer 51, a nickel sulfamate plating layer 52, and a phosphorous nickel plating layer 53 from the inside to the outside. also may In order to improve the process, only the aforementioned three-layer plating is applied to the outer surface of the electrical connector terminal, particularly the elastic arm 32 and the contact arm 33. In order to obtain a better contact effect when the electrical connector terminals are butted, a semi-spherical contact portion 331 is also plated with a layer of a more conductive metal such as gold or palladium nickel alloy. Of course, since the outermost layer of phosphorous nickel itself also has good electrical conductivity, the outer layer can also be no longer metallized.

100‧‧‧Electrical connector terminals

51‧‧‧ Nickel plating

52‧‧‧ Nickel sulfamate coating

53‧‧‧Phosphorus nickel plating

Claims (9)

An electrical connector terminal is fixed to an electrical connector, and includes: a connecting portion; a holding portion, one end is connected to the connecting portion for fixing the electrical connector terminal to the electrical connector; and the elastic portion extends from the other end of the holding portion, There is a contact portion for docking; wherein the surface of the electrical connector terminal is sequentially plated with a nickel plating layer, a nickel sulfamate plating layer, and a phosphorous nickel plating layer from the inside to the outside. The electrical connector terminal according to claim 1, wherein the nickel plating layer, the nickel sulfamate plating layer and the phosphorous nickel plating layer have thicknesses of 0.2 to 2 um, 0.2 to 2 um, and 0.2 to 1 um, respectively. The electrical connector terminal of claim 2, wherein the outer side of the phosphorous-nickel plating layer of the contact portion is further plated with gold or palladium nickel. The electrical connector terminal of claim 2, wherein the elastic portion comprises a semicircular arc extending from the retaining portion, extending from the arc toward the connecting portion and parallel to the retaining portion. The elastic arm and the contact arm extending from the elastic arm obliquely away from the holding portion, the surface of the contact arm is convex to form the contact portion. The electrical connector terminal of claim 4, wherein the connecting portion includes a base portion and a solder bump from a center of the base portion, the solder bump having a soldering surface protruding from the base portion. The electrical connector terminal of claim 5, wherein the aforementioned solder bump is stamped from the base. An electrical connector terminal made of a metal sheet, wherein the surface of the electrical connector terminal is sequentially plated with a nickel plating layer, a nickel sulfamate plating layer, and a phosphorous nickel plating layer from the inside to the outside. The electrical connector terminal according to claim 7, wherein the nickel plating layer, the nickel sulfamate plating layer and the phosphorous nickel plating layer have a thickness of 0.2 to 2 um, 0.2 to 2 um, and 0.2 to 1 um, respectively. The electrical connector terminal of claim 8, wherein the outer side of the phosphorous nickel plating layer of the contact portion is further plated with gold or palladium nickel.