Yamaichi Electric Mfg. Co., Ltd.

Junji Ishida

Noriyuki Matsuoka

An IC socket includes a socket body having a plurality of contacts arranged in such a manner as to contact terminal members of an IC package. A contact shutter member is vertically movably mounted on the socket body and adapted, when lowering, to push the contacts against their elastic property so that the contacts will be displaced backward and downward to remove the contact relation. A contact shutter device in the IC socket is characterized by each of the contact having a contact piece portion extending upward from a fixedly embedded portion thereof through a curved spring piece, a cantilever arm extending backward from the contact piece portion, the cantilever arm being provided with a pressing force receiving portion formed on a free end portion thereof and pushed down by the contact shutter member, and a push-start point of the pressing force receiving portion by the contact shutter device being set to a position which is higher than a contact point of the contact piece portion with respect to the terminal members.

Contact shutter device in IC socket

A socket for the use of an electric part has contacts disposed in such a manner as to contact with contact pieces or leads of an electric part and a stage with the electric part supported thereon and able to move between a lower position where the contact pieces are brought into contact with the contacts and an upper position where the contact pieces are brought out of contact with the contacts. The socket further has a swingable crankshaft as means for restraining the stage in the upper or lower position. The crankshaft is provided with a crank bar portion disposed in such a manner as to vertically move upward and downward while supporting the stage and to push up the stage during a raising movement thereof and a crank arm portion which is swung about the crank bar portion and engaged with lock means thereby to restrain the stage in the upper and lower positions.

Socket for the use of an electric part

An IC socket has an IC supporting means which can be moved between an upper and a lower positions with an IC mounted on it, a first spring means for energizing the IC supporting means so that the IC supporting means is pushed up to the upper position, a contact for contacting with a lead of the IC when the IC supporting means is moved to the lower position against the force of the first spring means, an IC vertical movement operating means which can be moved between the upper and lower positions and adapted to push down the IC supporting means against the first spring means, a second spring means for energizing the IC vertical movement operating means so as to push up the same to the upper position, and a lock means for retaining the IC supporting means to the lower position against the force of the first spring means by the vertical movement operation of the IC vertical movement operating means against the force of the second spring means or in accordance with the force of the second spring so that the IC is brought into contact with the contact. The retaining of the IC supporting means is released by the second vertical movement operation of the IC vertical movement operating means to allow the IC supporting means to be moved to the upper position in accordance with the force of the first spring means.

Growing community of inventors

Tokyo, Japan

Junji Ishida