Shield Case

• US 20080062668A1
• Filed: 07/21/2005
• Published: 03/13/2008
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Hayashikoshi, Kenji, Nakazawa, Yukio, Kakinoki, Wataru
• Granted Patent: US 7,746,666 B2
• Time in Patent Office: Days
• US Class Current: 361/816
• CPC Class Codes: H05K 9/0032 having multiple parts, e.g. frames mating with lids

Abstract

A shield case is fixed to a surface of a circuit board with a conductive joining material so as to cover a shielded portion on the circuit board surface. The shield case includes joint terminals extending outward and inclined upward from a lower edge thereof that is in contact with the circuit board surface. The joint terminals are joined to the circuit board surface with the conductive joining material provided therebetween. The shield case can thereby be fixed to the circuit board surface, and grounded to a ground portion provided on the circuit board.

Claims

1. A shield case fixed to a surface of a circuit board with a conductive joining material so as to cover a shielded portion on the surface of the circuit board,

wherein the shield case includes joint terminals extending outward and inclined upward from a lower edge of the shield case and placed in contact with the surface of the circuit board, and wherein the shield case is fixed and grounded to a ground portion of the surface of the circuit board by conductive joining material provided between the joint terminals and the surface of the circuit board.

2. The shield case according to claim 1, comprising:

a frame having the joint terminals, formed of a conductor, and fixed to the surface of the circuit board with the conductive joining material; and

a cover formed of a conductor, and fitted on and combined with the frame.

3. The shield case according to claim 2, wherein the frame includes a peripheral wall having a lower edge in contact with the surface of the circuit board, and the joint terminals extend outward and are inclined upward from the lower edge of the peripheral wall of the frame so as to be disposed at intervals along the peripheral wall, and wherein the cover includes a peripheral portion fitted on an outer surface of the peripheral wall of the frame, and the peripheral portion of the cover has elastic retaining portions that are in pressing contact with portions of the peripheral wall of the frame corresponding to the joint terminals so as to be electrically connected to the frame.

4. The shield case according to claim 3, wherein the peripheral wall of the frame and the peripheral portion of the cover respectively have combination fitting portions that are fitted together to combine the frame and the cover, and the combination fitting portion of the peripheral wall of the frame is provided in a portion of the frame in which the joint terminals are not provided.

5. The shield case according to claim 2, wherein a positioning projection protrudes downward from the lower edge of the peripheral wall of the frame, and is fitted in a positioning hole provided in the circuit board to position the frame on the circuit board.

6. The shield case according to claim 3, wherein a positioning projection protrudes downward from the lower edge of the peripheral wall of the frame, and is fitted in a positioning hole provided in the circuit board to position the frame on the circuit board.

7. The shield case according to claim 4, wherein a positioning projection protrudes downward from the lower edge of the peripheral wall of the frame, and is fitted in a positioning hole provided in the circuit board to position the frame on the circuit board.

8. The shield case according to claim 4, wherein the combination fitting portions comprise a protuberance on one of the cover and the frame and a corresponding opening in the other of the cover and the frame.

9. The shield case according to claim 8, wherein the protuberance has an outside dimension which is greater than a corresponding inside dimension of the opening.

10. A shield case for being fixed to a surface of a circuit board with a conductive joining material so as to cover a shielded portion on the surface of the circuit boards

wherein the shield case includes joint terminals extending outward and inclined upward from a lower edge of the shield case for being placed in contact with the surface of the circuit board whereby the shield case can be fixed and grounded to a ground portion of the surface of the circuit board by conductive joining material provided between the joint terminals and the surface of the circuit board.

11. The shield case according to claim 10, comprising:

a frame having the joint terminals, formed of a conductor, for being fixed to the surface of the circuit board with the conductive joining material; and

a cover formed of a conductor, for being fitted on and combined with the frame.

12. The shield case according to claim 11, wherein a positioning projection protrudes downward from the lower edge of the peripheral wall of the frame, for being fitted in a positioning hole provided in the circuit board to position the frame on the circuit board.

13. The shield case according to claim 11,

wherein the frame includes a peripheral wall having a lower edge for being placed in contact with the surface of the circuit board and the terminals extend outward and are inclined upward from the lower edge of the peripheral wall of the frame and are disposed at intervals along the peripheral wall,

wherein the cover includes a peripheral portion for being fitted on an outer surface of the peripheral wall of the frame, and

wherein the peripheral portion of the cover has elastic retaining portions for being placed in pressing contact with portions of the peripheral wall of the frame corresponding to the joint terminals so as to be electrically connected to the frame.

14. The shield case according to claim 13, wherein a positioning projection protrudes downward from the lower edge of the peripheral wall of the frame, for being fitted in a positioning hole provided in the circuit board to position the frame on the circuit board.

15. The shield case according to claim 13,

wherein the peripheral wall of the frame and the peripheral portion of the cover have respective combination fitting portions for being fitted to combine the frame and the cover, and

wherein the combination fitting portion of the peripheral wall of the frame is provided in a portion of the frame in which the joint terminals are not provided.

16. The shield case according to claim 15, wherein a positioning projection protrudes downward from the lower edge of the peripheral wall of the frame for being fitted in a positioning hole provided in the circuit board to position the frame on the circuit board.

17. The shield case according to claim 15, wherein the combination fitting portions comprise a protuberance on one of the cover and the frame and a corresponding opening in the other of the cover and the frame.

18. The shield case according to claim 17, wherein the protuberance has an outside dimension which is greater than a corresponding inside dimension of the opening.