Connection for electrodes

• US 4,303,293 A
• Filed: 02/08/1980
• Issued: 12/01/1981
• Est. Priority Date: 10/17/1979
• Status: Expired due to Term

• Current Assignee: Harco Electronics Limited
• Original Assignee: Harco Electronics Limited
• Inventors: Grunwald, Davor
• Primary Examiner(s): DESMOND, EUGENE
• Application Number:
  US06/119,676
• Time in Patent Office: 662 Days
• Field of Search: 339/61 R, 339/75 R, 339/75 M, 339/74 R, 339/238, 339/239, 339/256 S, 339/273 R, 339/273 S, 339/274, 24/73 SA, 24/73 AP, 24/73 PB, 128/419 PS, 128/802, 128/803, 128/641, 128/644, 128/303.13
• US Class Current: 439/263
• CPC Class Codes: A61B 5/273 Connection of cords, cables or leads to electrodes
• CPC Class Codes: A61B 5/274 using snap or button fasteners
• CPC Class Codes: H01R 11/24 with gripping jaws, e.g. crocodile clip
• CPC Class Codes: Y10S 439/909 Medical use or attached to human body

Abstract

A connector for electrodes in the form of an electrode clip is provided herein which is formed of resilient plastic material, e.g., polypropylene. It includes a fixed jaw and a movable jaw, the jaws being provided with cooperating female electrical contacts. An operating mechanism is provided which is composed of a plurality of elements interconnected together by at least two living hinges, one of which being secured to the movable such jaw, and the other interconnecting two operating members but preferably having at least three living hinges, one of the living hinges being integrally secured to the movable such jaw, with the other two living hinges interconnecting three operating members. The operating mechanism includes an operating lever which is movable to urge one jaw towards the other jaw, and thus to urge the jaws into a closed position. This action simultaneously forces a preselected one of the living hinges to an over-toggle position to lock the jaws in such closed position. This electrode clip can be easily manipulated with one hand to secure the connector to the electrode stud which is disposed, e.g., on a human body, to a lead cable, e.g., of an electrocardiograph, without any pressure being applied directly to the stud and hence transmitted to the human body.

Claims

1. An electrode clip formed of resilient plastic material comprising:

a fixed jaw, and a movable jaw pivotally urgeable towards the fixed jaw, said jaws including a pair of cooperating female electrical contacts;

an operating mechanism composed of a plurality of interconnected elements and including at least two living hinges, one of the elements being integrally secured to said movable jaw by a living hinge;

and a lever secured to said operating mechanism for operating on said operating mechanism for positively urging said movable jaw towards said fixed jaw;

thereby to urge said jaws to a closed position and simultaneously to force one said living hinge to an over-toggle position, and thus to lock said jaws in said closed position.

5. The electrode clip of claim 1 wherein said operating mechanism includes an elongated element integral with said fixed jaw.

6. The electrode clip of claim 1 wherein said operating mechanism includes an intermediate element connected to an elongated element which is integral with said fixed jaw, said intermediate element having said operating lever integrally secured thereto.

7. The electrode clip of claim 1 wherein one end of one said movable jaw is provided as a rabbet which slides in an associated rabbet in said fixed jaw.

8. The electrode clip of claim 1 wherein one end of said movable jaw includes an abutment to limit its movement toward said fixed jaw.

9. The electrode clip of claim 1 wherein said female electrode contacts include an indentation embracingly to engage an associated male electrode element.

10. The electrode clip of claim 1 including means positively securing said female electrode contacts within said jaws.

11. The electrode clip of claim 1 including means facilitating the electrical connection of lead electrode wires to one said electrical contact.

12. The electrode clip of claim 1 including a hollow boss on said fixed jaw, and a pair of channels passing longitudinally through said hollow boss to said fixed jaw, in order to facilitate the electrical connection of lead electrode wires to said electrical contact.

13. The electrode clip of claim 1 wherein said electrode contacts are located partially within slits in associated said jaws.

14. The electrode clip of claim 1 wherein said electrode contacts are located partially within slits in associated said jaws and wherein said female electrode contacts include an indentation embracingly to engage an associated male electrode element.

15. The electrode clip of claim 1 wherein said electrode contacts are located partially within slits in associated said jaws and including wedge means passing transversely through said jaws and associated electrode contacts for positively securing said female electrode contacts within said jaws.

22. The electrode clip of claim 1 formed of polypropylene.

2. An electrode clip formed of resilient plastic material comprising:

a fixed jaw and a movable jaw pivotally secured at one end to one end of said fixed jaw by a living hinge and urgeable towards the fixed jaw, said jaws including a pair of cooperating female electrical contacts;

an operating mechanism composed of a plurality of interconnected elements and including four living hinges, one said living hinge being integral with said movable jaw, and another said living hinge being integral with an integral extension of said fixed jaw the intermediate living hinges being interconnected to one another;

and a lever integral with said operating mechanism for operating on said operating mechanism for positively urging said movable jaw towards said fixed jaw;

thereby to urge said jaws to a closed position and simultaneously to force one said living hinge to an over-toggle position, and thus to lock said jaws in said closed position.

3. An electrode clip formed of resilient plastic material comprising:

a fixed jaw and a movable jaw, pivotally secured at one end to one end of said fixed jaw by a living hinge, said jaws including a pair of cooperating female electrical contacts and electrical lead wire guiding and securing bosses;

an operating mechanism composed of a plurality of interconnected elements and including four operating mevchanism living hinges, one said living hinge being integral with said movable jaw, and another end of said living hinge being integral with an extension of said fixed jaw the intermediate living hinges being interconnected to one another;

a lever integral with said operating mechanism for operating said operating mechanism for positively urging said movable jaw towards said fixed jaw, whereby, upon operation of said lever action is effected to urge said jaws to a closed position and simultaneously to force one said operating mechanism living hinge to an over-toggle position, and thus to lock said jaws in said closed position;

and a release mechanism, integral with said extension of said fixed jaw and said operating mechanism for positively drawing said movable jaw away from said fixed jaw.

4. An electrode clip formed of resilient plastic material comprising:

a generally inverted J-shaped fixed jaw and a generally C-shaped movable jaw pivotally secured at one end to one end of said fixed jaw by a living hinge, said jaws including a pair of cooperating female electrodes and electrical lead wire guiding and securing bosses;

an operating mechanism consisting essentially of a pair of elements interconnected by a living hinge, having a fixed end and a free end the free end of one said element being integrally secured to said movable jaw by a living hinge, the free end of said other element being pivotally mounted at the free end of said fixed jaw;

and a lever integral with said operating mechanism for operating on said operating mechanism for positively urging said movable jaw towards said fixed jaw;

thereby to urge said jaws to a closed position and simultaneously to force one said living hinge of said operating mechanism to an over-toggle position, and thus to lock said jaws in said closed position.

16. The electrode clip of claim 4 wherein said lever is pivotally secured to a semi-cylindrical fulcrum on said fixed jaw by means of a cylindrical pivot.

17. The electrode clip of claim 16 wherein said fulcrum includes a guideway thereon.

18. The electrode clip of claim 4 wherein one end of said movable jaw includes a tenon which slides in a mortise in said fixed jaw.

19. The electrode clip of claim 4 wherein said female electrodes are adapted to overlap one another, and including insulating material on said overlapping portions.

20. The electrode clip of claim 4 wherein said female electrodes are provided with male electrode engaging indentations.

21. The electrode clip of claim 4 including electrode wires secured to said female electrodes and held within said guiding and securing bosses.

23. The electrode clip of claim 4 formed of polypropylene.

24. An electrode clip formed of resilient plastic material comprising:

a fixed jaw, and a movable jaw pivotally urgeable towards the fixed jaw, said jaws including a pair of cooperating female electrical contacts;

an operating mechanism composed of a plurality of interconnected elements and including at least two living hinges, one of the elements being integrally secured to said movable jaw by a living hinge;

and a lever secured to said operating mechanism for operating on said operating mechanism for positively urging said movable jaw towards said fixed jaw, said lever including a spring section engaging said movable jaw section, whereby latching action is enhanced.

25. The electrode clip of claim 24 wherein said lever is secured to the remaining elements of said operating mechanism by means of a ball and socket joint.

26. The electrode clip of claim 24 wherein the operating mechanism is secured to said lever by a fulcrum joint.

27. The electrode clip of claim 24 including a projection on said lever and facing said spring section to ensure snap action.

28. A blank formed of resilient plastic material for distortion and assembly to provide an electrode clip, said blank including a first section adapted to provide an electrode engaging portion, and a second section adapted to provide an operating mechanism,

(A) said first section comprising:

(a) a fixed semi-circular segment including a free end and a well within which is adapted to be secured a first female electrical contact, said fixed semi-circular segment including a rabbet therein,

and

(b) a movable semi-circular segment having a connected end and a free end, said segment being hingedly connected at said connected end to said free end of said fixed semi-circular segment by a living hinge, and having its free other end provided as a rabbet movable towards said fixed semi-circular element for slidable engagement within said rabbet, of said fixed segment said movable segment including a well within which is adapted to be secured a cooperating female electrical contact;

and

(B) said second section comprising

(a) a first leg portion integrally joined at one end to another end of said fixed semi-circular segment and adapted to provide an elongated element of said operating mechanism;

(b) a second leg portion joined to the free end of said first leg portion by a living hinge, and adapted to provide an intermediate element of said operating mechanism;

(c) a third leg portion joined to the free end of said second leg portion by a living hinge and to said movable semi-circular element by a living hinge, and adapted to provide a swingable element of said operating mechanism;

and

(d) an elongated extension of said second leg portion, and adapted to provide a lever for said operating mechanism.

29. The blank of claim 28 including an hollow boss integrally formed on said fixed semi-circular segment.

30. The blank of claim 28 including gripping ribs formed on said first leg portion and on said elongated extension.

31. The blank of claim 28 including an arm-like extension formed in each of said first leg portion and said second leg portion.

32. The blank of claim 28 including an ear on each of said fixed semi-circular segment and said movable semi-circular segment adjacent said living hinge.

33. The blank of claim 28 injection molded from polypropylene.