Connector assembly for electrically connecting flexible and rigid printed circuits

• US 4,695,258 A
• Filed: 12/09/1986
• Issued: 09/22/1987
• Est. Priority Date: 12/09/1986
• Status: Expired due to Fees

• Current Assignee: CHERNE, LLOYD AND JOAN
• Original Assignee: Cherne Industries Incorporated (CRWS, Inc.)
• Inventors: Hanson, Daniel R., Nesheim, Ludwig D.
• Primary Examiner(s): Abrams, Neil
• Application Number:
  US06/939,715
• Time in Patent Office: 287 Days
• Field of Search: 339/17 F, 339/17 M, 339/17 LM, 339/59 M, 339/61 M, 339/74 R, 339/176 MF, 339/DIG. 3, 339/75 MP, 339/75 M
• US Class Current: 439/67
• CPC Class Codes: H01R 12/79 connecting to rigid printed circuits or like structures
• CPC Class Codes: H05K 3/365 by abutting, i.e. without alloying process

Abstract

The connector assembly is for connecting the conductive network of a flexible printed circuit to the conductive network of a rigid printed circuit board. The connector assembly comprises an alignment body structure mountable on the printed circuit and for positioning the flexible printed circuit for electrical communication with the rigid printed circuit. The alignment structure has a central aperture in alignment with the printed circuit contacts and a horizontal insertion aperture for ingress and egress of the flexible printed circuit in the plane of the rigid printed circuit. The connector assembly further comprises an elastomeric conductor disposed within the alignment structure so that the elastomeric conductor is between the communicative portions of the flexible printed circuit and the rigid printed circuit. A clamping structure is disposed within the alignment structure and which is operable in the central aperture to releasably urge the contact portions of the flexible circuit into communicative contact with the elastomeric conductor and the aligned contacts of the circuit board.

Claims

1. A unitary connector and alignment assembly for electrically connecting flexible circuits to rigid circuits comprising:

a. an alignment structure having horizontal and vertical support and positioning means to align the flexible circuit for electrical communication with the rigid circuit, said alignment structure having a vertical aperture in its bottom extending inwardly and a unitary horizontal aperture in its side, said horizontal aperture extending inwardly without obstruction to open at said vertical aperture for ingress and egress of the flexible circuit, said alignment structure being mounted on the rigid circuit so that said vertical aperture covers the communicative portions of the rigid circuit;

b. an elastomeric vertical conductor disposed within said vertical aperture so that said elastomeric vertical conductor is between the inserted flexible circuit and the rigid circuit; and

c. a hand operable clamping member connected to said alignment structure and moveable within said vertical aperture, above said elastomeric vertical conductor, to releasibly urge the flexible circuit and the rigid circuit into contact with said elastomeric vertical conductor.

2. The assembly of claim 1, wherein said alignment structure is comprised of a rectangular, non-conductive body additionally having a second vertical aperture in its top, said second vertical aperture being centrally disposed over and connected with said vertical aperture, said clamping member being extended through said second vertical aperture so that it prevents linear movement of said clamping member and permits rotation thereof.

3. The assembly of claim 2, wherein said second vertical aperture has horizontal dimensions coextensive with those of said vertical aperture and wherein said alignment structure additionally has a separable, coextensive upper structure disposed on its top, said upper structure having a clamping member retainer aperture generally disposed in its center so that it is aligned over said second vertical aperture, said clamping member retainer aperture engaging said clamping member so that it prevents linear movement of said clamping member and permits rotation thereof.

4. The assembly of claim 1, wherein said elastomeric vertical conductor has a plurality of vertically aligned conductive layers sandwiched between alternating non-conductive layers.

5. The assembly of claim 1, wherein said elastomeric vertical conductor is further disposed below the opening of said horizontal aperture to said vertical aperture to allow insertion of the flexible circuit into said vertical aperture at zero insertion force.

6. The assembly of claim 1, wherein said clamping member has a non-conductive clamping block for engaging the flexible circuit and hand-operable screw actuated linear force means connected to said clamping block for moving said clamping block into contact with the flexible circuit.

7. The assembly of claim 1, wherein said clamping member has a non-conductive cam for engaging the flexible circuit and a hand-operable lever connected to said cam for moving said cam into contact with the flexible circuit.

8. A zero insertion force connector assembly mountable on a rigid printed circuit board for receiving a flexible printed circuit, said assembly comprising:

a. a rectangular non-conductive body structure having a contact void, and an insertion aperture, said contact void being centered in and open to the bottom surface of said body structure, and extending inwardly therefrom to the top surface for enclosing the conductive network contacts of the rigid printed circuit board, said insertion aperture being disposed in the front surface of said body structure and extending inwardly at a right angle with and opening to said contact void for insertion of the flexible printed circuit parallel to the plane of the rigid printed circuit board, said connector assembly further having an upper body plate disposed on the top surface of said body structure and being generally coextensive therewith, said upper body plate having a retainer slot generally disposed in its center so that it is centrally aligned over said contact void, said body structure bottom surface being mountable on the rigid printed circuit board so that said contact void exposes the conductive network contacts of the rigid printed circuit board for contact with the inserted flexible printed circuit conductive network contacts;

b. a rectangular elastomeric electrical connector having a plurality of vertically conductive layers sandwiched between non-conductive layers, said elastomeric electrical connector being disposed in said contact void so that it contacts the rigid printed circuit board conductive network contacts and extends to a point immediately below said opening of said insertion aperture to said contact void; and

c. a hand-operable clamping assembly having a clamping block disposed in and moveable within said contact void and further having a clamping jack connected to said clamping block and extending through said top aperture, said retainer slot engaging said clamping jack so that it prevents linear movement of said clamping jack and permits rotation thereof, said clamping jack adjustably urging said clamping block downward in said contact void to hold the inserted flexible printed circuit conductive network contacts in contact with said elastomeric electrical connector.

9. The connector assembly of claim 8, wherein said clamping jack linearly moves said clamping block and is screw actuated.

10. The connector assembly of claim 8, wherein said body structure is attachable to the rigid printed circuit board by screw means, and wherein said elastomeric vertical conductor has a plurality of vertically aligned conductive layers sandwiched between alternating non-conductive layers.

11. A connector and alignment assembly for electrically connecting flexible circuits to rigid circuits comprising:

a. a generally rectangular, nonconductive alignment structure for positioning the flexible circuit for electrical communication with the rigid circuit, said alignment structure having a vertical aperture in its bottom extending inwardly to its top, a horizontal aperture in its side, said horizontal aperture extending inwardly to open at said vertical aperture for ingress and egress of the flexible circuit, and a separable, coextensive upper structure disposed on its top, said upper structure having a retainer aperture generally disposed in its center so that it is aligned over said vertical aperture, said alignment structure being mountable on the rigid circuit so that said vertical aperture covers the communicative portions of the rigid circuit;

b. an elastomeric vertical conductor disposed within said vertical aperture so that said elastomeric vertical conductor is between the inserted flexible circuit and the rigid circuit; and

c. a clamping member connected to said alignment structure and movable within said vertical aperture, above said elastomeric vertical conductor, to releasibly urge the flexible circuit and the rigid circuit into contact with said elastomeric vertical conductor, said retainer aperture engaging said clamping member so that it prevents linear movement thereof and permits rotation thereof.

12. The connector and alignment assembly of claim 11, wherein said horizontal aperture is flaired at its outside periphery to guide the terminal end of the flexible circuit into the vertical aperture of said assembly.

13. The connector and alignment assembly of claim 11, wherein said elastomeric vertical conductor has a plurality of vertically aligned conductive layers which are separated by non-conductive layers, and is disposed between the flexible circuit and the rigid circuit for electrical communication therebetween.