Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-10373789-B2
Application number	US-201715666718-A
Country	US
Kind code	B2
Filing date	Aug 2, 2017
Priority date	Aug 16, 2016
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

An electromagnetic relay includes a terminal electrically connected to a fixed contact or a movable contact, and a case accommodating a contact point. The terminal includes a terminal piece having at least a portion located outside the case. The case includes a bottom surface section (first peripheral wall section) and a side surface section (second peripheral wall section). The bottom surface section has a gap to be closed with a sealant and an outer surface to which the sealant is applied. The side surface section has a through hole through which the terminal piece is inserted. The case has a flow path along which the sealant applied to the outer surface flows from the outer surface to the through hole.

First claim

The invention claimed is:

1. An electromagnetic relay, comprising:
a contact point including a fixed contact and a movable contact;
a driver is configured to bring the movable contact into contact with the fixed contact and to separate the movable contact from the fixed contact;
a terminal electrically connected to the fixed contact or the movable contact; and
a case accommodating the contact point and the driver, wherein
the terminal includes a terminal piece having at least a portion located outside the case,
the case includes
a first peripheral wall section having a gap to be closed with a sealant and an outer surface to which the sealant is to be applied, and
a second peripheral wall section which is a peripheral wall section different from the first peripheral wall section and which has a through hole through which the terminal piece is inserted, and

the case has a flow path along which the sealant applied to the outer surface of the first peripheral wall section flows from the outer surface of the first peripheral wall section to the through hole in the second peripheral wall section.

2. The electromagnetic relay according to claim 1 , wherein
the flow path includes a wall section disposed in the case.

3. The electromagnetic relay according to claim 2 , wherein
the case includes
a base including the first peripheral wall section and having an opening, and
a cover covering the opening,

the base includes a first wall section forming the wall section, and
the cover includes a second wall section forming the wall section.

4. The electromagnetic relay according to claim 3 , wherein
the first wall section faces the second wall section with a space provided therebetween.

5. The electromagnetic relay according to claim 4 , wherein
the case has a storage space adjacent to a part of the terminal accommodated in the case and stores the sealant.

6. The electromagnetic relay according to claim 5 , wherein
the storage space is located in the case.

7. The electromagnetic relay according to claim 5 , wherein
the case includes a projection protruding from the second peripheral wall section, and
the storage space has a space in communication with the through hole and surrounded by the projection.

8. The electromagnetic relay according to claim 3 , wherein
the case has a storage space adjacent to a part of the terminal accommodated in the case and stores the sealant.

9. The electromagnetic relay according to claim 8 , wherein
the storage space is located in the case.

10. The electromagnetic relay according to claim 8 , wherein
the case includes a projection protruding from the second peripheral wall section, and
the storage space has a space in communication with the through hole and surrounded by the projection.

11. The electromagnetic relay according to claim 3 , wherein
the case includes a window adjacent to the through hole in the second peripheral wall section.

12. The electromagnetic relay according to claim 2 , wherein
the case has a storage space adjacent to a part of the terminal accommodated in the case and stores the sealant.

13. The electromagnetic relay according to claim 12 , wherein
the storage space is located in the case.

14. The electromagnetic relay according to claim 12 , wherein
the case includes a projection protruding from the second peripheral wall section, and
the storage space has a space in communication with the through hole and surrounded by the projection.

15. The electromagnetic relay according to claim 2 , wherein
the case includes a window adjacent to the through hole in the second peripheral wall section.

16. The electromagnetic relay according to claim 1 , wherein
the flow path is located at an outer surface of the second peripheral wall section outside the case and communicates with the through hole of the second peripheral wall section.

17. The electromagnetic relay according to claim 1 , wherein
the case has a storage space adjacent to a part of the terminal accommodated in the case and stores the sealant.

18. The electromagnetic relay according to claim 17 , wherein
the storage space is located in the case.

19. The electromagnetic relay according to claim 17 , wherein
the case includes a projection protruding from the second peripheral wall section, and
the storage space has a space in communication with the through hole and surrounded by the projection.

20. The electromagnetic relay according to claim 1 , wherein
the case includes a window adjacent to the through hole in the second peripheral wall section.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Nakahara Chiharu

Classifications

• H01H50/54

  Contact arrangements · CPC title

• H01H50/06

  having windows; Transparent cases or covers · CPC title

• H01H50/14

  Terminal arrangements {(for coils H01H50/443)} · CPC title

• H01H50/023 Primary

  Details concerning sealing, e.g. sealing casing with resin · CPC title

• H01H2223/002

  sealed · CPC title