AC POWER ADAPTER WITH SWIVELING PLUG HAVING FOLDING PRONGS

• US 20090227122A1
• Filed: 03/07/2008
• Published: 09/10/2009
• Est. Priority Date: 03/07/2008
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Jubelirer, Matthew, Lauby, William J., Ledbetter, Carl Joseph, Rensberger, Gary, Griffis, Jeffrey A.
• Granted Patent: US 7,658,625 B2
• Time in Patent Office: Days
• US Class Current: 439/11
• CPC Class Codes: H01R 13/6675 with built-in power supply
• CPC Class Codes: H01R 31/065 with built-in electric apparatus
• CPC Class Codes: H01R 35/04 Turnable line connectors with limited rotation angle with frictional contact members
• CPC Class Codes: Y10S 439/954 Special orientation of electrical connector

Abstract

An external AC power adapter is provided in a compact form factor that utilizes an AC plug that swivels about the body of the adapter and that includes prongs (i.e., electrical contacts or terminals) which can fold into the body for transport or storage. The swiveling AC plug enables the body of the AC power adapter to be rotatably oriented in a user-selectable manner in order to fit in tight spaces when plugged in to maximize the utilization of available outlets. The foldable prongs help to minimize the overall size of the AC power adapter for easy portability and storage. When folded, the prongs are protected against damage and are prevented from damaging or scratching other articles when the AC power adapter is packed in a bag or suitcase during travel.

Claims

1. An external AC power adapter, comprising:

a body formed from a resilient material and arranged to isolate electrically energized components housed therein;

AC-DC power conversion circuitry housed in the body, the AC-DC power conversion circuitry arranged for converting an AC power input to a DC power output; and

a plug that is swivelably coupled to the body and including electrical contacts coupled to an AC circuit portion of the power conversion circuitry, the electrical contacts being coupled to the plug so that electrical contacts are foldable between a stowed position and an extended position, the electrical contacts being further arranged for mateable engagement with corresponding contacts in an AC power receptacle when in the extended position, the plug being arranged to rotate at least 90 degrees with respect to the adapter for variably orientating the electrical contacts when in the extended position.

2. The external AC power adapter of claim 1 further including a DC output that is coupled to a DC circuit portion of the AC-DC power conversion circuitry.

3. The external AC power adapter of claim 2 in which the DC output includes a cable having a plurality of electrical conductors, a proximal end of the cable interfacing with the DC circuit portion of the AC-DC power conversion circuitry, and a distal end of the DC power cable having a device interface that includes a facility for delivering DC power from the DC circuit portion of the AC-DC power conversion circuitry to an electronic device.

4. The external AC power adapter of claim 2 in which the DC output includes an output jack that is disposed in the body and arranged to interface with a connector disposed at a proximal end of a cable, the cable having a device interface at a distal end that includes a facility for delivering DC power to an electronic device.

5. The external AC power adapter of claim 4 in which the output jack, connector, cable, and device interface are each compliant with USB.

6. The external AC power adapter of claim 1 in which the body includes an electrical contact receiving area for receiving the electrical contacts when the electrical contacts are folded into the stowed position.

7. The external AC power adapter of claim 6 in which the electrical contact receiving area is selected from one of recess in the body or a plurality of slots in the body in which each slot in the plurality is configured to receive a respective electrical contact.

8. The external AC power adapter of claim 1 in which the adapter comprises two body portions, the plug being swivelably coupled to a first portion of the body and the power conversion circuitry being housed in a second portion of the body, the two portions of the body being removably couplable.

9. The external AC power adapter of claim 1 in which the electrical contacts are selected from one of flat-bladed prongs or pins.

10. The external AC power adapter of claim 1 in which the electrical contacts pivot about a hinge having an axis that is orthogonal to an axis of rotation of the plug when swiveled.

11. An external AC power adapter comprising:

a body formed from a resilient material and arranged to isolate electrically energized components housed therein;

AC-DC power conversion circuitry housed in the body, the AC-DC power conversion circuitry arranged for converting an AC power input to a DC power output; and

a plug that is swivelably coupled to the body and including electrical contacts coupled to an AC circuit portion of the power conversion circuitry, the electrical contacts being coupled to the plug so that electrical contacts are foldable between a stowed position and an extended position, the electrical contacts being further arranged for mateable engagement with corresponding contacts in an AC power receptacle when in the extended position,

wherein the adapter comprises two body portions, the plug being swivelably coupled to a first portion of the body and the power conversion circuitry being housed in a second portion of the body, the two portions of the body being removably couplable;

wherein the first portion of the body that is coupled to the plug comprises a faceplate that is configured to be removably attachable to the second portion of the body that contains the power conversion circuitry, the faceplate comprising;

a user-operable release mechanism that when actuated releases the faceplate from the second portion of the body when the faceplate is attached to the second portion of the body;

a set of female electrical connectors arranged for mateable engagement with corresponding male electrical connectors when the faceplate is attached to the second portion of the body, the male connectors outwardly projecting from the second portion of the body and operatively coupled to the AC-DC power conversion circuitry, the female connectors being accessibly recessed in a back face of the faceplate and when engaged with the male connectors provide a source of AC power to the AC-DC power circuit when the electrical contacts of the plug are engaged with the corresponding contacts of a live AC power receptacle.

12. The external AC power adapter of claim 11 in which the plug is arranged as one of Type A plug or Type C plug.

13. The external AC power adapter of claim 12 in which the user-operable release mechanism is operable by hand without using tools.

14. The external AC power adapter of claim 13, the faceplate further including a locating feature that interoperates with a corresponding feature disposed on the second portion of the body so that the faceplate is attachable to the second portion of the body with a given orientation.

15. The external AC power adapter of claim 14, the faceplate further including a prong receiving recess that is arranged to receive the electrical contacts when in the stowed position.

16. The external AC power adapter of claim 15 in which the release mechanism includes a button disposed in a front face.

17. The external AC power adapter of claim 16 in which the electrical contacts are arranged as foldable prongs that are hingedly moveable from a stowed position to an extended position in which the prongs project from the front face of the faceplate, the foldable prongs being arranged for removably mateable engagement with terminals in an AC outlet when in the extended position.

18-20. -20. (canceled)

21. An external AC power adapter, comprising:

a body portion housing AC-DC power conversion circuitry arranged for converting an AC power input to a DC power output, the body portion having a set of electrical connectors operatively coupled to the AC-DC power conversion circuitry; and

a faceplate configured to be removably attachable to the body portion, the faceplate comprising;

a plug including electrical contacts foldable between a stowed position and an extended position, the electrical contacts arranged to engage corresponding contacts in an AC power receptacle when in the extended position;

a user-operable release mechanism for releasing the faceplate from the body portion when the faceplate is attached to the body portion; and

a set of electrical connectors for providing a source of AC power to the AC-DC power circuit when engaged with the set of electrical connectors of the body portion when the electrical contacts of the plug are engaged with the corresponding contacts of a live AC power receptacle.

22. The external AC power adapter of claim 21, wherein the body portion is formed from a resilient material and arranged to isolate electrically energized components housed therein.

23. The external AC power adapter of claim 21, wherein the set of electrical connectors of the body portion comprises a set of male electrical connectors and the set of electrical connectors of the faceplate comprises a set of female electrical connectors.