High frequency relay
First Claim
1. A high frequency relay comprising a contact base block having at least one pair of fixed contacts, at least one contact member with a movable contact, and an electromagnet for moving said contact member to open and close said pair of fixed contacts by said movable contact,wherein said contact base block comprises:
- a base having at least one pair of projections on its top surface, which is an injection-molded article of an electrical insulating material;
first metal films formed as said fixed contacts on top surfaces of said projections;
second metal films formed as connection terminals for outside devices on said base, each of which corresponds to one of said first metal films;
connecting means for making an electrical connection between each of said first metal films and the corresponding second metal film; and
a third metal film at least formed on the top surface of said base to provide electrical isolation from said first and second metal films, which works as electromagnetic shield means.
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Accused Products
Abstract
A high frequency relay comprises a contact base block having pairs of fixed contacts, contact members with movable contacts, and an electromagnet for moving the contact members to open and close the fixed contacts by the movable contacts. The contact base block comprises an injection-molded base having projections on its front surface, first metal films formed as the fixed contacts on top surfaces of the projections, second metal films formed as connection terminals for outside devices on a rear surface of the base, each of which corresponds to one of the first metal films, through holes each having a conductive material on its inner surface to make an electrical connection between one of the first metal films and the corresponding second metal film in the shortest distance, and a third metal film formed on the base to provide electrical isolation from the first and second metal films, which works as electromagnetic shield as well as a ground.
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Citations
19 Claims
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1. A high frequency relay comprising a contact base block having at least one pair of fixed contacts, at least one contact member with a movable contact, and an electromagnet for moving said contact member to open and close said pair of fixed contacts by said movable contact,
wherein said contact base block comprises: -
a base having at least one pair of projections on its top surface, which is an injection-molded article of an electrical insulating material;
first metal films formed as said fixed contacts on top surfaces of said projections;
second metal films formed as connection terminals for outside devices on said base, each of which corresponds to one of said first metal films;
connecting means for making an electrical connection between each of said first metal films and the corresponding second metal film; and
a third metal film at least formed on the top surface of said base to provide electrical isolation from said first and second metal films, which works as electromagnetic shield means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
a subbase that is an injection-molded article of an electrical insulating material; and
a fourth metal film formed on a surface of said subbase in a face to face relation with the top surface of said base when said contact sub block is mounted on said contact base block, so that said pair of fixed contacts are opened and closed by said movable contact in an electromagnetic shield space surrounded by said third and fourth metal films.
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9. The high frequency relay as set forth in claim 8, wherein said movable contact comes into contact with a required region of said fourth metal film when said pair of fixed contacts are opened by said movable contact, and wherein the required region of said fourth metal film is composed of a copper layer as an undercoat, nickel layer as an intermediate layer and a gold layer as an outer layer, and the balance of said fourth metal film is composed of a copper layer as the undercoat and a nickel layer as the outer layer.
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10. The high frequency relay as set forth in claim 8, comprising a first contact set of a first pair of fixed contacts and a first contact member used to switch a high frequency signal and a second contact set of a second pair of fixed contacts and a second contact member used to switch another high frequency signal, and wherein a shield wall for isolating said first contact set from said second contact set is integrally-molded with at least one of said base and said subbase.
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11. The high frequency relay as set forth in claim 8, comprising a coil block for housing said electromagnet, and wherein said subbase has coil block supporting means for supporting said coil block, which is integrally molded with said subbase.
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12. The high frequency relay as set forth in claim 11, wherein said coil block comprises an armature disposed between said contact member and said electromagnet and driven by energizing said electromagnet, and wherein a motion of said armature is transferred to said contact member through a first spring member held by spring holding means integrally molded with said subbase.
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13. The high frequency relay as set forth in claim 12, said coil block supporting means and said spring holding means are provided to a surface opposed to the surface having said fourth metal film of said subbase, and said contact member is attached to a through hole formed in said subbase with a second spring member such that said contact member receives a spring bias of said second spring member in a direction of spacing said movable contact from said fixed contacts, and wherein said contact member can be moved against the spring bias of said second spring member by said first spring member pushed by said armature to close said fixed contacts by said movable contact.
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14. The high frequency relay as set forth in claim 1, wherein each of said second metal films is formed on a bottom surface of said base at a position opposed to the corresponding one of said first metal films.
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15. The high frequency relay as set forth in claim 14, wherein said connecting means is metal pins, each of which is inserted into said base to electrically connect one of said first metal films with the corresponding second metal film in the shortest distance.
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16. The high frequency relay as set forth in claim 14, wherein said connecting means is through holes each having a conductive layer on its inner surface, each of which is formed in said base to electrically connect one of said first metal films with the corresponding second metal film in the shortest distance.
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17. The high frequency relay as set forth in claim 14, wherein said connecting means is through holes, each of which is filled with an electrically conductive material and formed in said base to electrically connect one of said first metal films with the corresponding second metal film in the shortest distance.
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18. The high frequency relay as set forth in claim 14, wherein each of said second metal films extends from the bottom surface to a side surface of said base, and said second metal films on the side surface are used to electrically connect with the outside devices.
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19. A high frequency relay comprising a contact base block having at least one pair of fixed contacts, at least one contact member with a movable contact, a contact sub block for movably supporting said contact member, and an electromagnet for moving said contact member to open and close said pair of fixed contacts by said movable contact,
wherein said contact base block comprises: -
a base that is an injection-molded article of an electrical insulating material;
first metal films formed as said fixed contacts on a top surface of said base;
second metal films formed as connection terminals for outside devices on said base, each of which corresponds to one of said first metal films;
connecting means for making an electrical connection between each of said first metal films and the corresponding second metal film; and
a third metal film at least formed on the top surface of said base to provide electrical isolation from said first and second metal films, which works as electromagnetic shield means, and wherein said contact sub block comprises;
a subbase that is an injection-molded article of an electrical insulating material; and
a fourth metal film formed on a surface of said subbase in a face to face relation with the top surface of said base when said contact sub block is mounted on said contact base block, so that said pair of fixed contacts are opened and closed by said movable contact in an electromagnetic shield space surrounded by said third and fourth metal films.
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Specification