Electromagnetic shielding structure

Patent metadata

Field	Value
Publication number	US-2016150685-A1
Application number	US-201414898217-A
Country	US
Kind code	A1
Filing date	Jul 1, 2014
Priority date	Jul 10, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

An electromagnetic shielding structure in one aspect of the present invention comprises one and more gripping members and a shielding case. The shielding case has a roof section and a plurality of side walls. The roof section comprises a polygonal panel that is shaped so as not to fit inside a 30 mm×30 mm square region. The side walls comprise panels that are provided so as to hang from portions corresponding to part or entirety of some of sides of the polygonal roof, and each side wall is configured to contact the gripping member at a position within a predetermined distance from an edge of that side wall in a direction perpendicular to both a thickness direction of that side wall and a thickness direction of a printed circuit board.

First claim

What is claimed is:

1 . An electromagnetic shielding structure comprising:
one or more gripping members and a shielding case, the one or more gripping members being surface-mounted on a mounting surface of an electronic component of a printed circuit board, the shielding case being held with the gripping member and thereby attached to the printed circuit board, the shielding case comprising a roof section and a plurality of side walls, the roof section configured to face the printed circuit board at a position to form a gap with the printed circuit board when the shielding case is attached to the printed circuit board, each of the plurality of side walls configured to be held with the gripping member in a state hanging toward the printed circuit board from each of a plurality of positions on a periphery of the roof section when the shielding case is attached to the printed circuit board,
the roof section comprising a polygonal panel that is shaped so as not to fit inside a 30 mm×30 mm square region,
the side walls comprising panels that are provided so as to hang from portions corresponding to part or entirety of some of sides of the polygonal roof, each side wall being configured to contact the gripping member at a position within a predetermined distance from an edge of that side wall in a direction perpendicular to both a thickness direction of that side wall and a thickness direction of the printed circuit board,
the electronic component mounted on the mounting surface being configured to be accommodated in a space surrounded by the printed circuit board, the roof section, and the side walls, and a conductor provided on the printed circuit board and the shielding case being configured to be electrically connected via the gripping member, when the shielding case is attached to the printed circuit board.

2 . The electromagnetic shielding structure according to claim 1 , wherein the side wall is configured to contact the gripping member at a position spaced by 2 to 5 mm from the edge of the side wall in the direction perpendicular to both the thickness direction of the side wall and the thickness direction of the printed circuit board.

3 . The electromagnetic shielding structure according to claim 1 , wherein, if the single side wall is held with a plurality of the gripping members, each of the adjacent gripping members and the side wall are configured to contact at a position spaced by 2 to 5 mm from each other.

4 . The electromagnetic shielding structure according to claim 1 , wherein the gripping member is formed to have a dimension of 2 to 10 mm in the direction perpendicular to both the thickness direction of the side wall and the thickness direction of the printed circuit board.

5 . The electromagnetic shielding structure according to claim 1 , wherein each of the one or more gripping members comprises one or more grip portions, the grip portion comprising one or more inner surface side grip portions to be pressed against an inner surface of the side wall and one or more outer surface side grip portions to be pressed against an outer surface of the side wall, and the inner surface side grip portion and the outer surface side grip portion provided on the one or more gripping members are configured to cooperate to hold the shielding case,
the inner surface side grip portion and the outer surface side grip portion are formed to have a dimension of 1 to 2 mm in the direction perpendicular to both the thickness direction of the side wall and the thickness direction of the printed circuit board.

6 . The electromagnetic shielding structure according to claim 1 , wherein the gripping member has a suction surface that can be suctioned by a suction nozzle of an automatic mounting machine, and the suction surface is formed to have a dimension of 0.5 to 2 mm in the direction perpendicular to both the thickness direction of the side wall and the thickness direction of the printed circuit board.

7 . The electromagnetic shielding structure according to claim 2 , wherein, if the single side wall is held with a plurality of the gripping members, each of the adjacent gripping members and the side wall are configured to contact at a position spaced by 2 to 5 mm from each other.

8 . The electromagnetic shielding structure according to claim 7 , wherein the gripping member is formed to have a dimension of 2 to 10 mm in the direction perpendicular to both the thickness direction of the side wall and the thickness direction of the printed circuit board.

9 . The electromagnetic shielding structure according to claim 8 , wherein each of the one or more gripping members comprises one or more grip portions, the grip portion comprising one or more inner surface side grip portions to be pressed against an inner surface of the side wall and one or more outer surface side grip portions to be pressed against an outer surface of the side wall, and the inner surface side grip portion and the outer surface side grip portion provided on the one or more gripping members are configured to cooperate to hold the shielding case, the inner surface side grip portion and the outer surface side grip portion are formed to have a dimension of 1 to 2 mm in the direction perpendicular to both the thickness direction of the side wall and the thickness direction of the printed circuit board.

10 . The electromagnetic shielding structure according to claim 9 , wherein the gripping member has a suction surface that can be suctioned by a suction nozzle of an automatic mounting machine, and the suction surface is formed to have a dimension of 0.5 to 2 mm in the direction perpendicular to both the thickness direction of the side wall and the thickness direction of the printed circuit board.

Assignees

• Kitagawa Ind Co Ltd

Inventors

• Kurita Tomohisa

Classifications

• H05K9/0028

  with retainers or specific soldering features · CPC title

• H05K9/0016

  having a spring contact · CPC title

• H05K9/0026 Primary

  integrally formed from metal sheet · CPC title

• H05K9/0035 Primary

  with retainers mounted beforehand on the PCB, e.g. clips · CPC title