Universal serial bus voltage transformer

• US 7,212,420 B2
• Filed: 02/12/2002
• Issued: 05/01/2007
• Est. Priority Date: 02/12/2002
• Status: Expired due to Fees

• Current Assignee: Sheng Hsin Liao
• Original Assignee: Sheng Hsin Liao
• Inventors: Liao, Sheng Hsin
• Primary Examiner(s): BERHANE, ADOLF D
• Application Number:
  US10/072,921
• Publication Number:
  US 20030151938A1
• Time in Patent Office: 1,904 Days
• Field of Search: 363/144, 363/145, 363/146
• US Class Current: 363/146
• CPC Class Codes: H01R 13/6675 with built-in power supply
• CPC Class Codes: H01R 2103/00 Two poles
• CPC Class Codes: H01R 24/68 mounted on directly pluggable apparatus
• CPC Class Codes: H01R 31/02 Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter with a holder adapted for supporting apparatus to which its counterpart is attached H01R33/92
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections

Abstract

The present invention provides a universal serial bus (USB) voltage transformer, which comprises a main body, a transformer circuit unit, and several connectors. The transformer circuit unit is disposed in or at the inside of the main body. The connectors are electrically connected to the transformer circuit unit directly or via a connection cable. A USB voltage transformer having travel charging function is thus formed. The USB voltage transformer of the present invention can simultaneously charge several portable electronic devices like mobile phones, personal digital assistants, electronic translators, and small cameras.

Claims

1. A portable universal serial bus voltage transformer, comprising:

a main body;

a transformer circuit unit disposed in said main body for converting power from an AC source to a DC charging voltage required for USB devices, said transformer circuit unit including a circuit board disposed within said main body, a transformer mounted to said circuit board, and a plug electrically coupled to an input of said transformer and extending from said circuit board to pass through corresponding openings in said main body for selective coupling directly to an outlet receptacle defining the AC source; and

,

a plurality of USB connectors electrically connected to an output of said transformer circuit unit for exclusive passage of said DC charging voltage provided by said transformer circuit unit therethrough, said plurality of USB connectors being operable to simultaneously connect a plurality of devices to said DC charging voltage output from said transformer circuit unit, said plurality of connectors including at least one A-type USB connector, at least one B-type USB connector, and at least one Mini-type USB connector;

whereby DC charging power to said devices is passed through said USB connectors exclusive of concurrent data passage therethrough.

2. The portable universal serial bus voltage transformer as claimed in claim 1, wherein said main body is a hollow shell body formed by a first half body and a second half body secured together by screws.

3. The portable universal serial bus voltage transformer as claimed in claim 1, wherein said main body has a receiving space therein to receive said transformer circuit unit and said connectors.

4. The portable universal serial bus voltage transformer as claimed in claim 1, wherein said main body has openings corresponding to said connectors.

5. The portable universal serial bus voltage transformer as claimed in claim 1, wherein said transformer is a linear transformer.

6. The portable universal serial bus voltage transformer as claimed in claim 1, wherein at least one of said USB connectors is a female USB connector.

7. The portable universal serial bus voltage transformer as claimed in claim 1, wherein at least one of said USB connectors is a male USB connector.