High-density printed circuit connector with pivotable spring

• US 5,421,738 A
• Filed: 06/29/1994
• Issued: 06/06/1995
• Est. Priority Date: 06/29/1994
• Status: Expired due to Fees

• Current Assignee: Miraco, Inc.
• Original Assignee: Miraco, Inc.
• Inventors: Roberts, Joseph A.
• Primary Examiner(s): Schwartz, Larry I.
• Assistant Examiner(s): HILL, JILL
• Application Number:
  US08/268,245
• Time in Patent Office: 342 Days
• Field of Search: 439/59, 439/62, 439/65, 439/67, 439/329, 439/636-637, 439/839, 439/260-261
• US Class Current: 439/260
• CPC Class Codes: H01R 12/721 cooperating directly with the edge of the rigid printed circuits
• CPC Class Codes: H01R 12/79 connecting to rigid printed circuits or like structures
• CPC Class Codes: H01R 12/87 acting automatically by insertion of rigid printed or like structures

Abstract

A connector for connecting conductor areas of a flexible circuit to contact pads of a PC board edge connector in which the connector pivotably supports a pair of springs which pivot to a first position, upon insertion of a PC board through the board opening of the connector, in which frictional engagement between the PC board edge connector and the conductor areas is minimized, and, a second position during final insertion of the PC board edge connector into the connector, in which the springs provide a sufficient contact pressure for adequate electrical contact between the conductors areas of the flexible circuit and the contact pads of the PC board edge connector. The pivotable arrangement of the springs minimizes the wear and tear of the internal components and the contact pads while ensuring adequate electrical connection between the interconnected components.

Claims

1. A connector for connecting electrical conductor areas of a flexible circuit with electrical conductor pads of a connector portion of a structure, said connector comprising a connector housing having a pivot bearing, a cavity, a spring located in said cavity by said pivot bearing for pivotal movement thereabout, and a flexible circuit, defining said conductor areas, positioned in said cavity to be urged by said spring into electrical contact with said conductor pads of said connector portion when inserted into said cavity;

wherein said spring defines an electrical contact producing portion and is pivotable about said pivot bearing to urge said conductor areas into electrical contact with said conductor pads when said connector portion is accommodated in said cavity and a follower portion, remote from said contact producing portion, is disposed to be engaged by said connector portion upon its insertion thereof into said cavity to urge said spring about said pivot bearing to produce said electrical contact.

2. A connector for reliably effecting desired electrically conductive contact between conductor areas of a flexible circuit with conductor pads of an edge connector portion of a circuit board, said connector comprising:

a) a connector housing defining a cavity to accommodate an edge connector portion of a desired circuit board, said housing having a first opening to allow said edge connector portion to access said cavity and a second opening to allow a flexible circuit to extend into said cavity of said connector housing; and

b) spring means for resiliently biasing said electrical conductor areas into electrical contact with said conductor pads when said edge connector portion is accommodated in said cavity, said spring means being supported by and pivotal about a pivot means located in the cavity and defining an electrical contact producing portion moveable about said pivot means to urge said conductor areas into electrical contact with said conductor pads when said edge connector portion is accommodated in said cavity and a follower portion, remote from said contact producing portion and said first opening, disposed to be engaged by said edge connector portion upon insertion thereof into said cavity to urge said spring means about said pivot means to produce said electrical contact;

wherein c) said spring means is pivotable about said pivot means so that said electrical contact producing portion of said spring means can pivot away from said edge connector portion as said edge connector portion enters said cavity through said first opening, and d) in achieving accommodation of said edge connector into said connector, said follower portion of said spring means engages said edge connector portion to urge said conductor areas into said desired electrical contact with said conductor pads.

3. A connector according to claim 2 wherein as said edge connector portion enters said cavity the tendency of the spring means to pivot provides a reduced frictional engagement between the connector and said edge connector portion during a first portion of engagement therebetween.

4. A connector according to claim 2 wherein opposed cavity defining surfaces of said connector accommodate a pair of said springs means facing one another each supporting a flexible circuit defining a plurality of conductor areas with the conductor areas of each of the flexible circuits facing one another to provide electrical contact with the conductor pads of said edge connector portion when engaged therewith.

5. A connector according to claim 2 wherein said spring means has a plurality of cantilever leaf springs located adjacent a longitudinal edge of said spring means located adjacent said first opening, and a second opposite longitudinal edge of said spring has an elongate guide surface facilitating insertion and retraction of a said desired edge connector portion from the connector.

6. A connector according to claim 5 wherein said plurality of cantilever parallel leaf springs each have a C-shaped portion, located adjacent said first opening, to facilitate pivotal movement of said C-shaped portion out of a path of said edge connector portion upon insertion thereof into said connector.

7. A connector according to claim 2 wherein said spring means defines a pair of spaced pivot arms which are pivotally supported by said housing.

8. A connector according to claim 7 wherein said spring means has a pair of alignment tabs which locate said spring means in said housing and a pair of locating tabs which engage and locate said flexible circuit relative to said spring means.

9. A connector according to claim 7 wherein pivot supports are recesses formed in said interior cavity.

10. A connector according to claim 2 wherein said housing comprises first and second modules having alignment means which facilitate proper alignment of said first and second modules with one another.

11. A connector according to claim 9 wherein an elongate rib extends between said recesses.

12. A connector according to claim 10 wherein each of said first and second modules is provided with a pair of alignment slots engaging a pair of opposed alignment tabs defined by said spring means.

13. A connector according to claim 10 comprising an outer housing provided with at least two pin apertures and each of said first and second modules is provided with at least one elongate pin which extends through one of said pin apertures and is fixedly secured thereto.

14. A connector according to claim 13 wherein a free end of said flexible circuit is secured to said at least one elongate pin of one of said first and second modules and is sandwiched between said outer housing and a corresponding one of said first and second modules, during assembly of said connector, to align and secure the free end of said flexible circuit to said connector.

15. A connector according to claim 14 wherein said first and second modules each define alignment members to align a second portion of a said flexible circuit with said housing.

16. A connector for connecting electrical conductor areas of a flexible circuit with conductor pads of an edge connector portion of a circuit board, said connector comprising:

a) a connector housing having a circuit board opening sized to at least partially accommodate a said edge connector portion, and said connector housing having a circuit opening allowing passage of two flexible circuits into an interior cavity of said connector housing; and

b) two springs for resiliently biasing electrical conductor areas of an edge connector contacting region of a flexible circuit into electrical contact with said conductor pads, when said connector engages a said edge connector portion, each spring being pivotably supported via a pivot support formed in opposed surfaces of said connector housing; and

c) each spring supporting a flexible circuit having conductor areas facing one another to provide electrical contact with said conductor pads of an edge connector portion when engaged therewith;

wherein

d) said two springs are freely pivotable about said pivot supports between first and second positions in the first of which longitudinal edges of said springs located adjacent said circuit board opening pivot away from one another, as said spring is pivoted to the first position, while opposite longitudinal edges of said springs, remotely located from said circuit board opening, pivot toward one another upon insertion of said edge connector portion into the interior cavity of said connector, the springs pivot away from one another and minimize frictional resistance between the conductor areas and the conductor pads and e) as said edge connector portion is fully inserted within the interior cavity, said springs provide, in the second position, suitable electrical contact pressure between the conductor areas and conductor pads.

17. A method of manufacturing a connector for connecting electrical conductor areas of a flexible circuit with conductor pads of an edge connector portion of a circuit board, comprising the steps of:

providing a circuit board opening, sized to at least partially accommodate an edge connector portion of a desired circuit board, within a connector housing;

providing at least a second opening within said connector housing for passage of a flexible circuit into an interior cavity of said connector housing;

pivotably supporting a spring, for resiliently biasing electrical conductor areas in an edge connector contacting region of a flexible circuit, when supported therein, into electrical contact with said conductor pads when said connector is attached to a said edge connector portion, via a pivot support formed in an interior surface of said connector housing;

said spring being freely pivotable about said pivot support between first and second positions in the first of which a longitudinal edge of said spring located adjacent said circuit board opening pivots toward the interior surface of said connector housing supporting said pivot support while a second opposite longitudinal edge of said spring located remoted said circuit board opening pivots away from the interior surface of said connector housing supporting said pivot support whereby said spring, upon insertion a said edge connector portion within the interior cavity of said connector, is pivoted to the first position and minimizes frictional resistance between the connector and a said edge connector portion and said spring and, when a said edge connector portion is fully inserted within the interior cavity, provides in the second position suitable electrical contact pressure between the conductor areas and conductor pads.