Electrical contact and socket for electrical parts

• US 7,381,062 B2
• Filed: 07/30/2007
• Issued: 06/03/2008
• Est. Priority Date: 08/02/2006
• Status: Active Grant

• Current Assignee: Enplas Corporation
• Original Assignee: Enplas Corporation
• Inventors: Shimada, Hideo
• Primary Examiner(s): NGUYEN, KHIEM M
• Application Number:
  US11/830,007
• Publication Number:
  US 20080032529A1
• Time in Patent Office: 309 Days
• Field of Search: 439/65, 439/66, 439/70, 439/74, 439/700
• US Class Current: 439/66
• CPC Class Codes: G01R 1/0433 Sockets for IC's or transistors
• CPC Class Codes: G01R 1/06722 Spring-loaded
• CPC Class Codes: H01R 12/57 surface mounting terminals
• CPC Class Codes: H01R 12/714 with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
• CPC Class Codes: H01R 13/2421 using coil springs
• CPC Class Codes: H01R 43/16 for manufacturing contact members, e.g. by punching and by bending

Abstract

The present invention is to provide an electrical contact and a socket for electrical parts which can be produced easily, at low cost and is light in weight. The contact pin 15 comprises a first contact member 26 having a first contact portion 26d to be contacted with an IC package 12, wherein the first contact member 26 is formed into a cylindrical shape by curling an electroconductive plate, a blocking piece 26e is formed at a middle portion of the cylindrical shape by making a cut in the middle portion, and the blocking piece 26e is bent toward an inside of the cylindrical shape in such a manner that the blocking piece, in a plan view, blocks a through hole that runs vertically through the inside of the cylindrical shape.

Claims

1. An electrical contact which comprises a first contact member having a first contact portion to be contacted with a first electrical part, wherein

the first contact member is formed into a cylindrical shape by curling an electroconductive plate, and

a blocking piece is formed at a middle portion of the cylindrical shape by making a cut in the middle portion, the blocking piece being bent toward an inside of the cylindrical shape in such a manner that the blocking piece, in a plan view, blocks a through hole that runs vertically through the inside of the cylindrical shape.

3. The electrical contact according to claim 1, wherein the first contact portion of the first contact member is formed into a crown-like shape.

4. The electrical contact according to claim 1, wherein a plurality of blocking pieces are formed on the first contact member and the plurality of blocking pieces, in a plan view, block the through hole that runs vertically through the inside of the cylindrical shape.

5. A socket for an electrical part which comprises:

a socket body to be disposed on a wiring board and to accommodate a first electrical part on an upper side of the socket body; and

a plurality of electrical contacts according to any one of claims 1 to 4, which are disposed in the socket body.

2. An electrical contact which comprises:

a first contact member having a first contact portion to be contacted with a first electrical part;

a second contact member having a second contact portion to be contacted with a second electrical part, the second contact member being disposed at a lower side of the first contact member; and

an urging means for urging the first and the second contact member in a direction opposite to each other, wherein,

the first contact member is formed into a cylindrical shape by curling an electroconductive plate,

a blocking piece is formed at a middle portion of the cylindrical shape by making a cut in the middle portion, the blocking piece being bent toward an inside of the cylindrical shape in such a manner that the blocking piece, in a plan view, blocks a through hole that runs vertically through the inside of the cylindrical shape.