# US 10,770,854 B2 · High integration assembly process for AC adapter with foldable prongs

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- Number: US 10,770,854 B2
- Document ID: US10770854B2
- Status: Granted
- Kind: B2
- Application number: 16/257,925
- Filed: 2019-01-25
- Published: 2020-07-30
- Granted: 2020-09-08
- Earliest claimed: 2019-01-25
- Assignees: Dell Products L.P.
- Applicants: Dell Products, L.P.
- Inventors: Andrew Thomas Sultenfuss; Priyank Jatin Gajiwala
- Web page: https://patentgrep.com/patent/US10770854B2

## CPC

- H01R 31/065: {with built-in electric apparatus}
- H01R 12/57: surface mounting terminals
- H01R 13/15: Pins, blades or sockets having separate spring member for producing or increasing contact pressure
- H01R 13/5213: {Covers}
- H01R 13/6675: {with built-in power supply}
- H01R 13/707: interlocked with contact members or counterpart
- H01R 24/68: mounted on directly pluggable apparatus
- H01R 35/04: Turnable line connectors with limited rotation angle {with frictional contact members}
- H05K 1/117: {Pads along the edge of rigid circuit boards, e.g. for pluggable connectors}
- H05K 3/325: by abutting or pinching; Mechanical auxiliary parts therefor
- H05K 1/0254: {High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection (electrostatic discharge protection for electric apparatus in general H05K9/0067, H05K9/0079); Arrangements for regulating voltages or for using plural voltages}
- H05K 2201/10189: Non-printed connector
- H05K 2201/10272: Busbars, i.e. thick metal bars mounted on the printed circuit board [PCB] as high-current conductors
- H05K 2201/10409: Screws
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

Methods of assembly are provided for an AC plug supporting foldable prongs. The AC plug includes: a cover including slots and prongs. In an extended position, the prongs are insertable in AC outlet receptacles and each prong contacts a spring mounted terminal that is coupled to a power circuit. In a retracted position, each prong is recessed in a slot of the cover and does not contact a spring mounted terminal. In the extended position, the coupling between each prong and the power circuit does not utilize wires. A first end of each spring mounted terminal is positioned on a contact pad of a printed circuit board (PCB) that connects the AC plug to the power circuit. A cap is fastened to the cover and secures the spring mounted terminals to the respective contact pads and secures the PCB and spring mounted terminal to the cover.

## Claims

### Claim 1

An AC (Alternating Current) plug for providing power via a power circuit, the AC plug comprising:
a PCB (printed circuit board) connecting the AC plug to the power circuit, wherein the PCB comprises a plurality of contact pads;
a cover comprising a plurality of slots;
a plurality of spring mounted terminals, wherein a first end of each of the spring mounted terminals is positioned on one of the plurality of contact pads, and wherein the spring mounted terminals are positioned based on an alignment of the second end of each of the spring mounted terminals with an alignment structure of the cover; and
a plurality of prongs conforming to receptacles of an AC outlet, wherein:
in an extended position, the plurality of prongs are insertable in the receptacles of the AC outlet and each of the plurality of prongs contacts a respective spring mounted terminal coupled to the power circuit; and
in a retracted position, each of the plurality of prongs are recessed in a slot of the plurality of slots of the cover and each of the plurality of prongs does not contact the respective spring mounted terminals.

### Claim 2 (depends on 1)

The AC plug of claim 1, wherein, in the extended position, the coupling between each of the plurality of prongs and the power circuit does not utilize wires.

### Claim 3 (depends on 1)

The AC plug of claim 1, further comprising a cap that is fastened to the cover and secures the spring mounted terminals to the respective contact pads.

### Claim 4 (depends on 1)

The AC plug of claim 1, wherein each of the plurality of prongs comprises a cam that contacts the respective spring mounted terminal when the prongs are in the extended position.

### Claim 5

An AC (Alternating Current) adapter for powering an Information Handling System (IHS), the AC adapter comprising:
an AC/DC converter;
an AC cord, wherein the AC cord is connected to the AC/DC converter at a first end and connected to an AC plug at a second end; and
the AC plug comprising:
a cover comprising a plurality of slots;
a PCB (printed circuit board) connecting the AC plug to the AC cord; wherein the PCB comprises a plurality of contact pads;
a plurality of spring mounted terminals, wherein a first end of each of the spring mounted terminals is positioned on one of the plurality of contact pads, and wherein the spring mounted terminals are positioned based on an alignment of the second end of each of the spring mounted terminals with an alignment structure of the cover; and
a plurality of prongs conforming to receptacles of an AC outlet, wherein:
in an extended position, the plurality of prongs are insertable in the receptacles of the AC outlet and each of the plurality of prongs contacts a respective spring mounted terminal that is coupled to the PCB; and
in a retracted position, the plurality of prongs are recessed in the plurality of slots of the cover and each of the plurality of prongs does not contact the respective spring mounted terminals.

### Claim 6 (depends on 5)

The AC adapter of claim 5, the coupling between each of the plurality of prongs and the PCB does not utilize wires.

### Claim 7 (depends on 5)

The AC adapter of claim 5, wherein the plug further comprises a cap that is fastened to the cover and secures the spring mounted terminals to the respective contact pads.

### Claim 8 (depends on 5)

The AC adapter of claim 5, wherein each of the plurality of prongs comprises a cam that contacts the respective spring mounted terminal when the prongs are in the extended position.

### Claim 9

A method of assembling an AC (Alternating Current) plug for providing power via a power circuit, the method comprising:
positioning an inner side of a cover for the AC plug in an upwards orientation, wherein the inner side of the cover comprises structures for receiving a PCB (printed circuit board) and for receiving a plurality of spring mounted terminals, and wherein the cover comprises a plurality of slots;
securing a plurality of foldable prongs to the inner side of the cover, wherein the prongs protrude from the outer side of the cover in an extended position, and wherein the prongs are recessed within the slots in a retracted position;
positioning the PCB on the cover, wherein the PCB comprises a plurality of contact pads connecting the PCB to the power circuit;
positioning the plurality of spring mounted terminals on the inner side of the cover, wherein a first end of each spring mounted terminal is positioned on a contact pad of the PCB;
positioning a cap on the spring mounted terminals, the PCB and the cover, wherein assembly holes of the cap, the PCB and the cover are aligned; and
fastening the cap to the cover, wherein the first end of each spring mounted terminal is secured against a respective positioned contact pad.

### Claim 10 (depends on 9)

The method of claim 9, wherein in the extended position, each of the plurality of prongs contacts a spring mounted terminal that is in contact with a contact pad of the PCB, wherein the contact pads are coupled to the power circuit.

### Claim 11 (depends on 10)

The method of claim 10, wherein, in the retracted position, each of the plurality of prongs does not contact the respective spring mounted terminals.

### Claim 12 (depends on 10)

The method of claim 10, wherein, in the extended position, the coupling between each of the plurality of prongs and the power circuit does not utilize wires.

### Claim 13 (depends on 9)

The method of claim 9, wherein, in the extended position, each spring mounted terminal is loaded and exerts a force against a prong.

### Claim 14 (depends on 9)

The method of claim 9, wherein the spring mounted terminals are positioned based on an alignment of the second end of each of the spring mounted terminals with an alignment structure of the cover.