Electrical connector

• US 4,842,558 A
• Filed: 10/14/1988
• Issued: 06/27/1989
• Est. Priority Date: 10/14/1988
• Status: Expired due to Term

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Strand, Jerome E.
• Primary Examiner(s): DESMOND, EUGENE
• Application Number:
  US07/258,182
• Time in Patent Office: 256 Days
• Field of Search: 439/395, 439/399, 439/820, 439/842, 439/848-850, 439/863, 439/909
• US Class Current: 439/863
• CPC Class Codes: A61N 1/3752 Details of casing-lead connections
• CPC Class Codes: H01R 4/50 utilising a cam, wedge, cone or ball also combined with a screw
• CPC Class Codes: Y10S 439/909 Medical use or attached to human body

Abstract

An electrical connector for releasably connecting a flat terminal, such as the terminal of a biomedical electrode, to an electric wire. The connector comprises a housing having a passageway extending substantially therethrough, and an actuator in the passageway. The housing has a first terminal-engaging surface defining one side of the passageway, and the actuator has a second terminal-engaging surface complementary to the first terminal-engaging surface of the housing. The actuator is slidable generally diagonally of the passageway in the housing between an open position, wherein the first and second terminal-engaging surfaces are spaced apart a distance at least as large as the thickness of the electrode terminal so that the terminal may be placed between the surfaces, and a wedged position, wherein the first and second terminal-engaging surfaces are sufficiently close to clamp the terminal between the surfaces with the actuator being wedged against the terminal to retain the terminal in the connector.

Claims

1. An electrical connector for releasably connecting a substantially flat terminal to an electric wire, the connector comprising:

a housing having a passageway extending substantially therethrough defining a longitudinal direction, and a first terminal-engaging surface in the housing defining at least a portion of the passageway;

an actuator having a second terminal-engaging surface complementary to the first terminal-engaging surface of the housing;

means for conductively attaching the electric wire to the connector; and

cooperable positioning means for slidably positioning the actuator along the passageway of the housing such that the actuator is slidable generally diagonally with respect to the passageway between an open position, wherein the first and second terminal-engaging surfaces are spaced apart a distance at least as large as the thickness of the terminal so that the terminal may be placed between the surfaces, and a wedged position, wherein the first and second terminal-engaging surfaces are sufficiently close to clamp the terminal between the surfaces with the actuator being wedged against the terminal to retain the terminal in the connector.

2. An electrical connector according to claim 1 wherein the cooperable positioning means includes first positioning means along opposite sides of the passageway extending generally longitudinally of the passageway at an angle no greater than approximately 10 degrees relative to the first terminal-engaging surface for slidably positioning the actuator, and second positioning means along opposite sides of the actuator extending at an angle relative to the second terminal-engaging surface substantially equal to the angle of the first positioning means relative to the first terminal-engaging surface, the first and second positioning means being cooperatively adapted to permit movement of the actuator between the open and wedged positions such that the first and second terminal-engaging surfaces are substantially parallel throughout the movement.

3. An electrical connector according to claim 2 wherein the angle of the first positioning means relative to the first terminal-engaging surface of the housing is approximately five degrees.

4. An electrical connector according to claim 2 wherein the first positioning means comprises ribs along the opposite sides of the passageway in the housing extending generally longitudinally of the passageway at the angle relative to the first terminal-engaging surface, and the second positioning means comprises walls forming channels along the opposite sides of the actuator complementary to the ribs of the housing, the ribs being slidably received in the channels for movement of the actuator between the open and closed positions.

5. An electrical connector according to claim 4 wherein the first and second terminal-engaging surfaces are generally arcuate with the axis of curvature of each surface extending generally longitudinally relative to the passageway of the housing.

6. An electrical connector according to claim 5 wherein the first terminal-engaging surface is generally cylindrically convex and the second terminal-engaging surface is generally cylindrically concave.

7. An electrical connector according to claim 6 further comprising retaining means for preventing separation of the actuator from the housing.

8. An electrical connector according to claim 7 wherein the retaining means comprises a lip at one end of the second terminal-engaging surface of the actuator for engaging one edge of the housing when the actuator is in its open position to prevent separation of the actuator from the housing.

9. An electrical connector according to claim 1 wherein the housing has forward and rearward edges, and the passageway extends substantially between the forward and rearward edges, the connector further comprising an aforesaid electric wire attached to one end of the actuator constituting the rearward end of the actuator, the cooperable positioning means being adapted for moving the actuator from its open position toward its wedged position as the actuator is moved generally longitudinally rearwardly so that the actuator may be moved to its wedged position by pulling the wire rearwardly.

10. An electrical connector according to claim 9 wherein the actuator and the housing are molded of an electrically-conductive polymer.

11. An electrical connector according to claim 1 wherein the actuator comprises a body of electrically-conductive material and means for attaching the electrical wire to the body, the wire-attaching means being adapted for a snap fit on the body to hold the wire between the wire-attaching means and the body.

12. An electrical connector according to claim 11 wherein the wire-attaching means is adapted for attaching electrical wires of the type having a central conductive core coated with an electrical-insulating layer, the wire-attaching means being formed of generally electrical conductive material, and including opposed blades spaced apart a distance no greater than the thickness of the conductive core and adapted to cut through the electrical-insulating layer to provide a conductive path between the wire and the second terminal-engaging surface.

13. An electrical connector according to claim 12 wherein the body and wire-attaching means are formed of carbon fiber reinforced polyphenylene sulfide material.

14. An electrical connector according to claim 12 further including retaining means for preventing separation of the actuator from the housing, the retaining means comprising portions associated with the blades of the wire-attaching means extending beyond the second terminal-engaging surface of the actuator for engaging one edge of the housing when the actuator is in its open position.