Electronics packaging assembly with parallel circuit boards and a vibration stiffener

• US 7,193,863 B2
• Filed: 01/28/2005
• Issued: 03/20/2007
• Est. Priority Date: 01/28/2005
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Tullidge, Lee H., Tillinghast, William M.
• Primary Examiner(s): Dinh; Tuan
• Assistant Examiner(s): Bui; Hung S.
• Application Number:
  US11/043,931
• Publication Number:
  US 20060171132A1
• Time in Patent Office: 781 Days
• Field of Search: 361/607, 361/609, 361/615, 361/625, 361/683, 361/725, 361/732, 361/740, 361/747, 361/754, 361/759, 361/798, 361/801, 361/802, 361/752, 361/797
• US Class Current: 361/801
• CPC Class Codes: H05K 7/1424 Card cages

Abstract

An electronics packaging assembly (100) includes: an assembly housing (120); a plurality of printed circuit boards (110; 210) arranged in parallel within the assembly housing (120); and a vibration stiffener (140; 240). The printed circuit boards (110; 210) each have a notch (112; 212) on one edge. The vibration stiffener (140; 240) is arranged within the assembly housing (120) along a lateral direction relative to the plurality of printed circuit boards (110; 210) and includes a plurality of slots (142; 242) that engage with corresponding notches (112; 212) of the plurality of printed circuit boards (110; 210), wherein engagement of the vibration stiffener (140; 240) with the plurality of printed circuit boards (110; 210) limits flexing of the printed circuit boards (110; 210) in the lateral direction. In one implementation, a portion of the assembly housing (120) contacts and applies pressure to the vibration stiffener (140; 240) to keep the vibration stiffener (140; 240) in place.

Claims

1. An electronics packaging assembly comprising:

an assembly housing;

a plurality of circuit boards arranged in parallel within said assembly housing, said circuit boards each having a notch on one edge;

a vibration stiffener arranged within said assembly housing along a lateral direction relative to said plurality of circuit boards, said vibration stiffener including a plurality of slots that engage with corresponding notches of said plurality of circuit boards, wherein engagement of said vibration stiffener with said plurality of circuit boards limits flexing of said circuit boards in said lateral direction, such that said vibration stiffener extends along a direction transverse to said plurality of parallel circuit boards and by engaging with said plurality of parallel circuit boards stabilizes said plurality of parallel circuit boards along an axis that is transverse to said plurality of parallel circuit boards; and

wherein said assembly housing includes a cover, a surface of which abuts said vibration stiffener, such that said cover exerts pressure on said vibration stiffener to maintain firm engagement between said vibration stiffener and said plurality of circuit boards.

2. The electronic packaging assembly of claim 1, wherein said vibration stiffener is not secured to said assembly housing.

3. The electronics packaging assembly of claim 1, wherein said vibration stiffener is secured to said assembly housing.

4. The electronics packaging assembly of claim 1, wherein said notches of said plurality of circuit boards are positioned where maximum lateral flex occurs during vibration.

5. The electronics packaging assembly of claim 1, wherein said assembly is for use in aerospace/avionics applications.

6. The electronics packaging assembly of claim 1, wherein said vibration stiffener has a square-shaped or rectangular-shaped cross-section.

7. The electronics packaging assembly of claim 1, wherein said vibration stiffener has a circular-shaped cross-section.

8. The electronics packaging assembly of claim 1, wherein said vibration stiffener is electrically isolated from conductive components of said printed circuit boards.

9. The electronics packaging assembly of claim 1, wherein said vibration stiffener also functions as an electrical grounding element or an electrical connection between printed circuit boards.

10. The electronics packaging assembly of claim 1, wherein said vibration stiffener also functions as a heat sink.