# US 2014/0193987 A1 · Electrical contact device

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- Number: US 2014/0193987 A1
- Document ID: US20140193987A1
- Status: Published application
- Kind: A1
- Application number: 14/128,196
- Filed: 2012-07-26
- Published: 2014-07-10
- Earliest claimed: 2011-07-29
- Assignees: Salcomp Oyj
- Inventors: Simo Kaurala
- Web page: https://patentgrep.com/patent/US20140193987A1

## CPC

- H01R 12/57: surface mounting terminals
- H01R 12/714: {with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit}
- H01R 13/2421: {using coil springs}
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

The present invention relates to an electrical contact device which comprises an electrically conductive base part, and an electrically conductive protruding part protruding from the electrically conductive base part. The electrical contact device also comprises an electrically conductive coil spring having a diameter that increases from a first end to a second end of the electrically conductive coil spring. The electrically conductive coil spring is arranged around the electrically conductive protruding part in such a manner that the first end of the electrically conductive coil spring faces the electrically conductive base part, and the electrically conductive coil spring extends further from the electrically conductive base part than the electrically conductive protruding part does.

## Claims

### Claim 1

An electrical contact device, comprising:
an electrically conductive base part, and
an electrically conductive protruding part protruding from the electrically conductive base part;
wherein the electrical contact device comprises an electrically conductive coil spring having a diameter that increases from a first end to a second end of the electrically conductive coil spring, the electrically conductive coil spring being arranged around the electrically conductive protruding part in such a manner that the first end of the electrically conductive coil spring faces the electrically conductive base part, and the electrically conductive coil spring extends further from the electrically conductive base part than the electrically conductive protruding part does.

### Claim 2 (depends on 1)

The electrical contact device according to claim 1, wherein the first end of the electrically conductive coil spring is arranged against the electrically conductive base part.

### Claim 3 (depends on 1)

The electrical contact device according to claim 1, wherein the electrically conductive protruding part has an essentially round cross section.

### Claim 4 (depends on 1)

The electrical contact device according to claim 1, wherein the minimum inner diameter of the electrically conductive coil spring is smaller than the diameter of the electrically conductive protruding part.

### Claim 5 (depends on 1)

The electrical contact device according to claim 1, wherein the electrically conductive coil spring extends at least 0.1 mm further from the electrically conductive base part than the electrically conductive protruding part does.

### Claim 6 (depends on 1)

The electrical contact device according to claim 1, wherein the number of turns of the electrically conductive coil spring is at least 3.

### Claim 7 (depends on 1)

The electrical contact device according to claim 1, wherein the electrically conductive base part comprises a groove arranged around the circumference of said electrically conductive base part in a plane perpendicular to the protruding direction of the electrically conductive protruding part.

### Claim 8 (depends on 1)

The electrical contact device according to claim 1, wherein the electrically conductive base part is a plug pin.

### Claim 9 (depends on 1)

The electrical contact device according to claim 1, wherein the inner diameter of the electrically conductive coil spring is 1-4 mm.

### Claim 10 (depends on 1)

An electrical contact arrangement, comprising:
a printed circuit board having a contact pad;
wherein the electrical contact arrangement comprises an electrical contact device according to claim 1, the electrically conductive coil spring being arranged in contact with the contact pad.

### Claim 11 (depends on 10)

The electrical contact arrangement according to claim 10, wherein the contact pad defines an aperture arranged to receive an end of the electrically conductive protruding part.

### Claim 12 (depends on 10)

The electrical contact arrangement according to claim 10, wherein the contact pad comprises protrusions on the surface of the contact pad, the second end of the electrically conductive coil spring being arranged in contact with the protrusions.

### Claim 13 (depends on 10)

The electrical contact arrangement according to claim 10, wherein the size of the contact pad is less than 5 mm×5 mm.