USB hub with sound output function

Abstract

A USB hub comprises a USB mainframe unit for connecting to a computer through a connecting wire so as to support second USB expansion units to connect other peripherals; at least one fist USB expansion unit having a bus; the fist USB expansion unit supporting sound outputs; the logic switch having one end connected between the fist USB expansion unit and a USB controller; and another end of the logic switch being connected to a power supply end of the USB mainframe unit or an external power source. The USB mainframe unit, second USB mainframe units, USB controller, and logic switch are contained within a casing; the fist USB expansion unit is at a top surface of the casing for receiving a device uprightly. The casing is installed with a first plug connected to the external power source and a second plug connected to an earphone or a trumpet.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the circuit of the present invention.

FIG. 2 shows the perspective view of the present invention.

FIG. 3 shows one application of the present invention.

Claims

1. A USB hub comprising: a USB mainframe unit for connecting to a computer through a connecting wire so as to support second USB expansion units to connect other peripherals;at least one fist USB expansion unit having a bus; the fist USB expansion unit supporting sound outputs;the logic switch having one end connected between the fist USB expansion unit and a USB controller; and another end of the logic switch being connected to a power supply end of the USB mainframe unit or an external power source.

2. The USB hub as claimed in claim 1, wherein the USB mainframe unit, second USB mainframe units, USB controller, and logic switch are contained within a casing; the fist USB expansion unit is at a top surface of the casing for receiving a device uprightly.

3. The USB hub as claimed in claim 2, wherein the device is an MP3 player or a media player.

4. The USB hub as claimed in claim 1, wherein the casing is installed with a first plug connected to the external power source and a second plug connected to an earphone or a trumpet; and the second plug is also connected to a sound output of the fist USB expansion unit.