Yokowo Co., Ltd.

Shinichi Ishizuka

Kenji Endo

Yasuhiro Minoura

An insulating holder has a first face and a second face, with a first hole that has a first diameter at the first face, and a second hole that has a second diameter larger than the first diameter and extended from the second face so as to communicate with the first hole. Inside the second hole is a plate-shaped conductive terminal that has a base portion and at least one pair of guide portions extended from the base portion so as to define a concave portion between opposed inner edges of the guide portions. The concave portion faces the first hole. Included in between the opposed inner edges of the guide portions is a conductive pin with a plunger portion that has a diameter smaller than the first diameter and a bulged portion that has a diameter larger than the first diameter. The bulged portion of the pin has opposed grooves at its periphery that run parallel to the plunger portion's longitudinal axis and is fitted with the guide portions so as to be slidable along the concave portion. A spring member is also provided in the concave portion so as to urge the pin toward the first face of the holder, so that the plunger portion of the pin is retractably protruded from the first face of the holder through the first hole.

Spring connector with slotted conductive pin

A coil spring contact connector (C) includes a plurality of coil spring contacts ( ) and an insulating holder ( ) holding the coil spring contacts arranged at intervals. Each coil spring contact has a pair of end contact coils ( ) to be brought into contact with a terminal electrode ( ), and middle contact coils ( ) radially offset relative to the end contact coils ( ) so as to be brought into contact with another terminal electrode ( ). The holder is provided with openings through which contact parts of the end and the middle contact coils project outside, respectively, restrains each coil spring contact ( ) from axial deformation and axial movement, and allows each coil spring contact ( ) to be deformed in an offset direction thereof.

Coil spring contact connector

An antenna structure obtains a snap-in antenna having a short signal transmission path, it being possible to switch between an antenna of a case and an outside antenna with low transmission loss. When an antenna side attachment section is inserted into an antenna attachment hole, a plunger is elastically forced so as to protrude in a direction intersecting with the insertion direction of a spring connector provided on a circuit board and elastically contacts a conductive member which is electrically connected to an antenna base. A small through-hole is provided in the conductive member at the contact position; a second spring connector is provided on the antenna attachment section and has a second plunger, one end of the plunger passing through the through-hole and being elastically forced toward the other side so as to project thereto; a coaxial connector containing section is provided at the other end and a coaxial connector can be inserted therein. A coaxial connector insertion hole is provided in the case facing the coaxial connector containing section. When the coaxial connector is inserted, a central conductor thereof applies a pressing force to the plunger of the spring connector, thereby separating it from the conductive member.

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Tokyo-to, Japan

Shinichi Ishizuka