Socket for electrical parts

A socket for an electrical part comprising:

• a socket body having an accommodation portion in which an electrical part having a number of terminals is accommodated;
• a number of contact pins arranged to the socket body so as to be contacted to or separated from the terminals of the electrical part;
• a pressure cover mounted to the socket body to be pivotal at one end portion thereof in a manner that, when the pressure cover is pivoted in a cover closed direction, the electrical part accommodated in the accommodation portion of the socket body is pressed and held so that the terminals of the electrical part are contacted to the contact pins, respectively;
• an arm member attached to another end portion of the pressure cover to be rotatable around a first shaft member with which said arm member is rotatably connected to another end portion of the pressure cover;
• a latch member attached to the arm member to be rotatable around a second shaft member with which said latch member is connected to the arm member so that said latch member engages with or separated from the socket body;
• a link member disposed between the latch member and the pressure cover;
• a third shaft member with which the link member is rotatably connected to the latch member;
• a fourth shaft member with which the link member is rotatably connected to the pressure cover;
• and
• a slot formed in the link member and extended to a longitudinal direction of the link member, one of said third and fourth shaft members being inserted into said slot and slidably movable along the longitudinal direction of said slot,
• wherein when the arm member is rotated from a standing-up position to a fallen position, the link member moves in the longitudinal direction of the slot along the inserted shaft, and when the arm member is further rotated the latch member is rotated through the link member to be engaged with the socket body, and when the arm member is further rotated in the same direction, the pressure cover further approaches the socket body, and when the arm is rotated in another direction from the fallen position to the standing-up position, the link member moves in the longitudinal direction of the slot along the inserted shaft and at the same time the engagement between the latch member and the socket body is slacked, and when the arm member is further rotated in the same direction the latch member is rotated through the link member in a direction to release the engagement of the latch member with the socket body.