Surface mount fuse

Patent metadata

Field	Value
Publication number	US-10490379-B2
Application number	US-201916364910-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Apr 5, 2017
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A surface mount fuse including a fuse body having a base including a floor and a plurality of adjoining sidewalls defining an interior cavity, wherein top edges of the sidewalls define a recessed shoulder bordering the interior cavity, and a cover including a main body disposed on the recessed shoulder and enclosing the interior cavity, first and second terminals extending through opposing sidewalls of the base, the first and second terminals extending around the opposing sidewalls and the cover and disposed in abutment therewith to secure the cover to the base, and a fusible element extending through the interior cavity and connected to the first and second terminals.

First claim

The invention claimed is:

1. A method of manufacturing a surface mount fuse, the method comprising:
molding a base of a fuse body around first and second terminals, the base including a floor and a plurality of adjoining sidewalls defining an interior cavity, the first and second terminals extending through opposing sidewalls of the base;
wherein the fusible element is planar and includes first and second terminal portions connected by a bridge portion, and wherein connecting the fusible element to the first and second terminals comprises disposing the first and second terminal portions in flat engagement with the first and second terminals outside of the interior cavity.

2. The method of claim 1 , further comprising connecting a fusible element to the first and second terminals, the fusible element extending through the interior cavity.

3. The method of claim 1 , wherein the fusible element further includes flanges extending from the bridge portion, and wherein connecting the fusible element to the first and second terminals further comprises disposing the flanges on a recessed shoulder defined by top edges of the sidewalls to the base.

4. The method of claim 2 , further comprising filling the interior cavity with an arc quenching material.

5. The method of claim 2 , further comprising disposing a cover of the fuse body on a recessed shoulder formed in top edges of the sidewalls of the base.

6. The method of claim 5 , further comprising bending the first and second terminals around the opposing sidewalls and the cover to secure the cover to the base.

7. The method of claim 6 , wherein the cover includes a plateau extending from a top surface thereof and defining an elevated surface, wherein bending the first and second terminals comprises disposing ends of the first and second terminals adjacent to edges of the plateau and disposing bottom surfaces of the first and second terminals in a coplanar relationship with the elevated surface.

8. A method of manufacturing a surface mount fuse, the method comprising:
molding a base of a fuse body around first and second terminals, the base including a floor and a plurality of adjoining sidewalls defining an interior cavity, the first and second terminals extending through opposing sidewalls of the base;
connecting a fusible element to the first and second terminals, the fusible element extending through the interior cavity, wherein the fusible element is planar and includes first and second terminal portions connected by a bridge portion, and wherein connecting the fusible element to the first and second terminals comprises disposing the first and second terminal portions in flat engagement with the first and second terminals outside of the interior cavity;
disposing a main body of a cover of the fuse body on a recessed shoulder formed in top edges of the sidewalls of the base, wherein flanges extending from longitudinal ends of the main body are disposed in complementary notches formed in the top edges of the opposing sidewalls; and
bending the first and second terminals around the opposing sidewalls and the cover to secure the cover to the base.

Assignees

• Littelfuse Inc

Inventors

• De Leon Conrado
• Enriquez Albert

Classifications

• H01H85/18

  Casing fillings, e.g. powder · CPC title

• H01H85/38

  Means for extinguishing or suppressing arc (by powder filling H01H85/18; by mechanical tension applied to fusible member H01H85/36) · CPC title

• H01H2085/0414

  Surface mounted fuses · CPC title

• H01H69/02

  Manufacture of fuses · CPC title

• H01H85/143 Primary

  Electrical contacts; Fastening fusible members to such contacts · CPC title