A socket for an electrical part, comprising:
- a socket body which is located on a wiring substrate and accommodates an electrical part on an upper side thereof,
- plural electric contacts which are located in the socket body, wherein
- each electrical contact of the plural electric contacts comprises:
- a first contact member, having conductivity, and which has an external cylinder portion with an opening end,
- a second contact member, having conductivity, and which has an internal contact portion to be inserted into the external cylinder portion through the opening end from a first end of the internal contact position so that the second contact member is thereby interlinked with the first contact member in an extensible manner, and
- an urging member which, when the internal contact portion is inserted into the external cylinder portion, urges the first contact member and the second contact member toward a direction to separate the first contact member and the second contact member,
- for each respective electrical contact of the plural electric contacts,
- when the internal contact portion of the respective electrical contact is inserted into the external cylinder portion of the respective electrical contact, one of the first and second contact members of the respective electrical contact contacts to the electrical part, and the other of the first and second contact members of the respective electrical contact contacts to the wiring substrate,
- the internal contact portion of the respective electrical contact has a taper shape which expands from the first end of the internal contact portion of the respective electrical contact toward a second end of the internal contact portion of the respective electrical contact, to thereby provide a taper shape surface of the internal contact portion of the respective electrical contact, and
- when the internal contact portion of the respective electrical contact is inserted into the external cylinder portion of the respective electrical contact, the internal contact portion of the respective electrical contact moves in the external cylinder portion of the respective electrical contact with the taper shape surface contacting an internal surface of the opening end of the external cylinder portion of the respective electrical contact, so that the internal contact portion of the respective electrical contact thereby conducts with the external cylinder portion of the respective electrical contact as the internal contact portion of the respective electrical contact moves in the external cylinder portion of the respectful electrical contact.