US 5,963,116 AGranted

Reed relay and a method of producing the reed relay

AssigneeFujitsu Takamisawa Component Limited

InventorsTomohisa Endoh, Yukishige Noguchi, Yukihiro Takano, Hideto Harayama

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Abstract

A reed relay includes a reed switch with contacts, and a pair of terminals connected to the contacts. A tubular electrostatic shield defines an axially extending central bore within which the reed relay is inserted. A coil assembly has a winding drum, and a coil provided on the winding drum. The winding drum defines an axially extending central bore within which the electrostatic shield is inserted with the reed switch. A first pair of leads extend oppositely to each other, and are connected to the electrostatic shield at the opposite ends of the coil assembly. A second pair of leads extend oppositely to each other, and are connected to the electrostatic shield at the opposite ends of the coil assembly. A third pair of leads extend oppositely to each other, and are connected to the coil at the opposite ends of the coil assembly. A fourth pair of leads extend oppositely to each other, and are connected to the terminal of the reed switch at the opposite ends of the coil assembly. The fourth pair of leads being disposed between the first and second pairs of leads.

Claims12

Dependent claims

A reed relay, comprising:

a reed switch with contacts, and a pair of terminals connected to the contacts, the reed switch defining an axis;
a tubular electrostatic shield defining an axially extending central bore within which the reed relay is inserted with the terminals extending from the central bore;
a coil assembly having a winding drum of a electrically insulating material, and a coil provided on the winding drum, the winding drum defining an axially extending central bore within which the electrostatic shield is inserted with the reed switch;
a first pair of leads which extend oppositely to each other and parallel to the axis of the reed switch, and are connected to the electrostatic shield at the opposite ends of the coil assembly;
a second pair of leads which extend oppositely to each other and parallel to the axis of the reed switch, and are connected to the electrostatic shield at the opposite ends of the coil assembly;
a third pair of leads which extend oppositely to each other and parallel to the axis of the reed switch, and are connected to the coil at the opposite ends of the coil assembly;
and
a fourth pair of leads which extend oppositely to each other and parallel to the axis of the reed switch, and are connected to the terminal of the reed switch at the opposite ends of the coil assembly, the fourth pair of leads being disposed between the first and second pairs of leads.

5 more elements

A method of producing a reed relay, the reed relay including a reed switch with a contact, and a pair of terminals connected to the contact, the reed switch defining an axis, a tubular electrostatic shield defining an axially extending central bore for receiving the reed relay is inserted with the terminals extending from the central bore, a coil assembly having a winding drum of a electrically insulating material, and a coil provided on the winding drum, the winding drum defining an axially extending central bore within which the electrostatic shield is inserted with the reed switch;

the method comprising the steps of:
forming a first lead frame in the form of a strip including a plurality of first lead segments which includes a main portion for forming the tubular electrostatic shield, a first pair of leads which extend laterally and oppositely to each other and are connected to the main portion, a second pair of leads which extend laterally and oppositely to each other and are connected to the main portion, a third pair of leads which extend laterally and oppositely to each other and are not connected to the main portion, and a pair of tabs which are connected to the first, the second and the third pairs of leads at the outer ends thereof opposite to the main portion;
forming the main portions into the tubular electrostatic shields by pressing;
forming coil bobbins on the first lead frame by forming at least winding drums on the tubular electrostatic shields by an insert molding method with an electrically insulating material, the ends of the first, the second and the third leads adjacent to the main portion being embedded in flanges of the bobbin;
separating the coil bobbins from the first lead frame with the tabs connected to the end of the first, the second and the third pairs of leads;
providing a coil on the winding drum to provide a coil assembly;
inserting the reed switch into the central bore of the electrostatic shield;
and
connecting a fourth pair of leads which extend laterally and oppositely to each other to the terminals of the reed switch.

6 more elements

Dependencies are inferred from the claim text.