Yamaichi Electronics Co., Ltd.

Shuuji Kunioka

Katsumi Suzuki

Eiichi Murakoshi

Yuji Nakamura

Yuji Kato

Kazumi Uratsuji

Shunji Abe

Hideki Sagano

Eiji Kobori

Takahiro Ishibashi

A semiconductor device socket including lever members connected to a pressing member movably supported by a pressing member support body. The lever members are operated in conjunction with rotation of an engaging pin of an operating lever supported by a common support shaft with the pressing member support body.

Semiconductor device socket

A probe pin cartridge includes a first substrate disposed opposite to a positioning member, a second substrate laid beneath the first substrate, having the same contour as that of the first substrate and a plurality of probe pins held by the first and second substrates.

Cartridge for contact terminals and semiconductor device socket provided with the same

The probe pin cartridge is held in the cartridge accommodating region of the frame body when the slider members are in the locked state, and detachable from the cartridge accommodating region when the slider members are in the unlocked state by the operation of the operating buttons.

Socket for semiconductor device

An IC socket for the fine pitch IC package includes a socket body having an opening for guiding the IC package, an insulation base having a plurality of through-holes corresponding to the external terminals of the IC package, the contact pins placed in the through-holes, and a cover member for applying a predetermined pressure to bring the external terminals of the IC package and the contact pins into contact with one another. Each of the contact pins is formed with a first plunger including a terminal portion to be in contact with the external terminal of the IC package, a wider portion whose width is larger than the width of the terminal portion and the shaft whose width is equal to or smaller than the terminal portion, the coil spring, and the second plunger having a U-shape section, to be connected with the contact terminal of external circuit.

IC socket for a fine pitch IC package

An IC package receptacle is disclosed in which, as an actuator is pushed down, a pushing surface thereof pushes down pressure bearing portions of a plurality of contacts against an elastic force to bring the contacts into and out of contact with leads of an IC package. To cope with an increase of the number of contact poles, the pushing load is reduced by providing a plurality of pushing load peaks brought about by different pushing surfaces. The contacts are grouped into a plurality of unit groups of contacts. The individual groups of contacts are pushed by the different pushing surfaces, respectively, thus providing a deviation between pushing load peaks and provided by the pushing surfaces on the respective unit groups of contacts.

Integrated circuit package receptacle

To shift contacts of a socket for an electric part rearwardly, there is provided a slider for sliding the contacts. The slider is slid in the same direction that it moves the contacts. The slider and the contacts are engaged with each other in such a manner as to cooperatively act such that the contacts are shifted rearwardly by sliding the slider rearwardly.

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Yokohama, Japan

Shuuji Kunioka