Contact member, connector, composition, and method for producing contact member

Patent metadata

Field	Value
Publication number	US-12355172-B2
Application number	US-202217895614-A
Country	US
Kind code	B2
Filing date	Aug 25, 2022
Priority date	Mar 27, 2020
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The present invention provides a contact member that strikes a balance between low electrical resistance and sliding durability. A contact member of the invention has a metal base and a coating disposed on at least part of the metal base. The coating contains fluorinated oil having a polar group, and metal particles surface-treated with a fluorine-based compound having a polar group.

First claim

What is claimed is:

1. A contact member comprising:
a metal base; and
a coating disposed on at least part of the metal base, the coating containing fluorinated oil having a polar group, and metal particles surface-treated with a fluorine-based compound having a polar group,
wherein the metal particles have an average primary particle size of 0.2 μm to 10.0 μm, and wherein a metal of the metal base is identical to that of the metal particles.

2. The contact member according to claim 1 , wherein the polar group is a hydroxyl group.

3. The contact member according to claim 1 , wherein a ratio of a content (mass %) of the fluorinated oil to a content (mass %) of the metal particles (fluorinated oil content (mass %)/metal particle content (mass %)) is 15 to 25.

4. The contact member according to claim 1 , wherein a ratio of an area of the metal particles to an area of the coating, when the coating is observed from a normal direction of the coating, is 3.6% to 15.0%.

5. The contact member according to claim 1 , wherein the metal base has a Vickers Hardness of 180 Hv or less.

6. The contact member according to claim 5 , wherein a ratio of an average secondary particle size (μm) of the metal particles to a maximum height Ry (μm) of surface roughness of the metal base (average secondary particle size (μm) of the metal particles/maximum height Ry (μm) of surface roughness of the metal base) is 1.0 to 1.2.

7. The contact member according to claim 1 , wherein the metal base has surface roughness with a maximum height Ry of 0.5 μm to 1.7 μm.

8. A connector comprising the contact member according to claim 1 .

9. A method for producing the contact member according to claim 1 , comprising forming the coating by supplying a composition comprising the fluorinated oil having the polar group; and the metal particles surface-treated with the fluorine-based compound having the polar group on the metal base.

10. The contact member according to claim 1 , wherein the metal particles have an average secondary particle size of 1.7 μm to 2.1 μm.

Assignees

• Japan Aviation Electronics Ind Ltd

Inventors

• Yamada Kazuhiko
• Suzuki Akiko
• Sato Akinobu

Classifications

• H01H1/025

  having copper as the basic material · CPC title

• C23C24/10

  with intermediate formation of a liquid phase in the layer · CPC title

• H01R43/16

  for manufacturing contact members, e.g. by punching and by bending · CPC title

• C23C26/00

  Coating not provided for in groups C23C2/00 - C23C24/00 · CPC title

• H01R12/73

  connecting to other rigid printed circuits or like structures · CPC title