US 7,679,476 B2Granted

Polarized electromagnetic relay and coil assembly

AssigneeFujitsu Componenet Limited

InventorsKazuo Kubono, Shinichi Sato

Life of this patent

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Abstract

A polarized electromagnetic relay including an electromagnet assembly, a contact section insulated from the electromagnet assembly, and a force transfer member disposed between the electromagnetic assembly and the contact section. The electromagnet assembly includes an electromagnet, an armature driven by the electromagnet, and a permanent magnet carried on the armature. The armature includes first and second electrically conductive plate elements holding the permanent magnet therebetween in a direction of magnetization of the permanent magnet and disposed to orient the direction of magnetization in parallel with the center axis of the coil. The armature is arranged linearly movably in a direction parallel with the center axis in a state where a part of the first electrically conductive plate element is inserted into a space between the outer peripheral region of the iron core head portion and the distal end region of the yoke major portion.

Claims17

Dependent claims

A polarized electromagnetic relay comprising:

a base;
an electromagnet assembly fitted to said base, said electromagnet assembly comprising an electromagnet, an armature driven by said electromagnet, and a permanent magnet carried on said armature;
a contact section fitted to said base and insulated from said electromagnet assembly;
and
a force transfer member disposed between said electromagnet assembly and said contact section, said force transfer member being shiftable under an action of said electromagnet assembly to make said contact section open or close;
wherein said electromagnet includes a coil with a center axis, an iron core provided with a shaft portion disposed along said center axis of said coil and a head portion extending outside of said coil and radially outward from one axial end of said shaft portion, and a yoke joined to another axial end of said shaft portion of said iron core and extending outside of said coil, said yoke including a major portion extending generally parallel with said center axis, an outer peripheral region of said head portion of said iron core being opposed to and spaced from a distal end region of said major portion of said yoke;
wherein said armature includes first and second electrically conductive plate elements holding said permanent magnet therebetween in a direction of magnetization of said permanent magnet and disposed to orient said direction of magnetization in parallel with said center axis of said coil, said armature being arranged linearly movably in a direction parallel with said center axis in a state where a part of said first electrically conductive plate element is inserted into a space defined between said outer peripheral region of said head portion of said iron core and said distal end region of said major portion of said yoke;
and
wherein said force transfer member is arranged to linearly shift in a direction parallel with said center axis to make said contact section open or close, while accompanying with a linear movement of said armature driven by said electromagnet in the direction parallel with said center axis.

6 more elements

A polarized electromagnetic relay comprising:

a base;
an electromagnet assembly fitted to said base, said electromagnet assembly comprising an electromagnet, an armature driven by said electromagnet, and a permanent magnet carried on said armature;
a contact section fitted to said base and insulated from said electromagnet assembly;
and
a force transfer member disposed between said electromagnet assembly and said contact section, said force transfer member being shiftable under an action of said electromagnet assembly to make said contact section open or close;
wherein said electromagnet includes a coil with a center axis, a bobbin on which said coil is wound, and at least three coil terminals securely supported on said bobbin, a conductive wire forming said coil being connected to each of said coil terminals;
wherein said coil constitutes two excitation circuits, each excitation circuit including a terminal pair defined by any two of said at least three coil terminals;
wherein each of said at least three coil terminals is provided with a tying portion to which said wire is connected and a termination portion defined away from said tying portion, said tying portion and said termination portion being disposed to protrude outside of said bobbin;
wherein said bobbin is provided with a first surface defining a side from which said tying portion, of one coil terminal of said terminal pair in each of said two excitation circuits protrudes, and a second surface defining another side opposite to said first surface and from which said termination portion of said one coil terminal protrudes;
and
wherein said conductive wire is provided with a first lead portion extending between said coil and said tying portion of said one coil terminal of said terminal pair, said first lead portion being laid along said first surface of said bobbin, and a second lead portion extending between said coil and said tying portion of another coil terminal of said terminal pair, said second lead portion being laid along said second surface of said bobbin.

8 more elements

A coil assembly used in a polarized electromagnetic relay, said coil assembly comprising:

a coil with a center axis;
a bobbin on which said coil is wound;
and
at least three coil terminals securely supported on said bobbin, a conductive wire forming said coil being connected to each of said coil terminals;
wherein said coil constitutes two excitation circuits, each excitation circuit including a terminal pair defined by any two of said at least three coil terminals;
wherein each of said at least three coil terminals is provided with a tying portion to which said wire is connected and a termination portion defined away from said tying portion, said tying portion and said termination portion being disposed to protrude outside of said bobbin;
wherein said bobbin is provided with a first surface defining a side from which said tying portion of one coil terminal of said terminal pair in each of said two excitation circuits protrudes, and a second surface defining another side opposite to said first surface and from which said termination portion of said one coil terminal protrudes;
and
wherein said conductive wire is provided with a first lead portion extending between said coil and said tying portion of said one coil terminal of said terminal pair, said first lead portion being laid along said first surface of said bobbin, and a second lead portion extending between said coil and said tying portion of another coil terminal of said terminal pair, said second lead portion being laid along said second surface of said bobbin.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/068,037Filed 31 Jan 2008
Priority: JP 2007-02153531 Jan 2007
Published: US 2008/0180197 A131 Jul 2008
Granted: 16 Mar 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H01H 50/642
Intermediate part performing a rectilinear movement: intermediate part being generally a slide plate, e.g. a card
H01H 50/043
Details concerning assembly of relays: details particular to miniaturised relays
H01H 50/443
Magnetic coils or windings: connections to coils
H01H 51/2209
Polarised relays: with rectilinearly movable armature