Pin plunger and IC socket

A pin plunger comprising:

• a first contact member;
• a second contact member that faces and is apart from the first contact member;
• a spring arranged between the first contact member and the second contact member;
• a housing that houses the first contact member, the second contact member, and the spring;
• a fixing plate arranged outside the housing;
• a bimetal arranged on the fixing plate;
• and
• a housing adjusting plate arranged on the bimetal, in contact with the housing, and arranged outside the housing, wherein
• the bimetal comprises a first metal and a second metal, the first metal having a thermal expansion coefficient different from a thermal expansion coefficient of the second metal, and
• an elastic force decreased or increased by contracting or expanding of the spring due to a temperature change is compensated with a warping force due to stretching of the first metal and the second metal.

An IC socket comprising:

• a wiring board that comprises wiring;
• a socket pin arranged on the wiring and electrically connected to the wiring;
• a pin plunger arranged on the socket pin and electrically connected to the socket pin;
• and
• a socket body that comprises the socket pin and the pin plunger which are provided in a predetermined arrangement, wherein
• the pin plunger comprises
• a first contact member;
• a second contact member that faces the first contact member and is apart from the first contact member;
• a spring arranged between the first contact member and the second contact member;
• and
• a housing that houses the first contact member, the second contact member, and the spring,
• the housing includes a bimetal inside or outside the housing,
• the bimetal includes a first metal and a second metal, the first metal having a thermal expansion coefficient which is different from a thermal expansion coefficient of the second metal;
• and
• an elastic force decreased or increased by contracting or expanding of the spring due to a temperature change is compensated with a warping force due to stretching of the first metal and the second metal.