JP2003241858A - Usb hub incorporating rechargeable battery and double layer condenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that, because a USB port of an ordinary personal computer can only supply a power source of 5-v and 500 mA, if a plurality of USB peripheral devices operating on USB bus power are connected to a hub and used, the required current exceeds a permissible range of the supplied current, disabling the operation of the device in some cases, where it is required to connect an AC adaptor for supplying the power source, but purchasing the AC adaptor for connection is very troublesome and costly. <P>SOLUTION: In an internal circuit of the USB hub, a rechargeable battery and a double layer condenser are incorporated, thus adding a function that operates devices connected to the USB hub by adding charged electricity to the bus power if the current is insufficient. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION Commercialized USB hubs with four or more ports often come with an AC adapter. If the power supplied to the device connected to the hub is insufficient, use the AC adapter. , The USB device is operated by the self-power supplied from the hub body. Normally, the power that a USB hub can supply to peripheral devices is 5V, 50
It is 0 mA, and when a plurality of devices are connected to the hub at the same time for operation, the total voltage may exceed 500 mA, and the devices connected to the USB hub cannot be operated. Therefore, an AC adapter is attached for the hub body to supply power to the body. The voltage and current required to charge the battery used in small devices are smaller than those supplied from the USB port, so the mouse connected to the hub while charging the rechargeable battery installed in the hub It is possible to operate a keyboard or the like.

[0002]

2. Description of the Related Art It is an existing concept to put a battery in an electric appliance that is often carried around, but the built-in power supply of the hub is not only for carrying around, but also as an aid when the bus power supplied from the personal computer is insufficient. Is the role of. The concept of putting a rechargeable battery or a double layer capacitor in the USB hub in order to increase the current supplied to the connected device has not been invented, and is a completely different invention from the mobile battery.

[0003]

The power supplied from the personal computer to the USB hub is usually 5V, 500 mA, and when a plurality of USB devices with large power consumption are connected, the devices connected to the hub may not operate. . Therefore A
It was necessary to supply power from the C adapter to the USB hub, but connecting the AC adapter was time-consuming and costly to purchase.

[0004]

Means for Solving the Problems A rechargeable battery or a double-layer capacitor is incorporated in the internal circuit of a USB hub, and when the power supplied to a USB device is insufficient, the charged power is used to increase the voltage or current.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has a structure as shown in FIG. 1, and has a rechargeable battery and a double-layer capacitor part in addition to a normal hub function. The rechargeable battery and the double layer capacitor are charged by being supplied with power from the USB port of the computer. When the current or voltage is insufficient, power is sent to the connected equipment.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIG. 1. In FIG. 1, a rechargeable battery and a double layer capacitor are incorporated inside a main body of a USB hub.

Referring to FIG. 2, this drawing is a reference diagram in which the device of the present invention, a personal computer and a USB device are connected. The charging control circuit sends the optimum voltage and current for charging to the rechargeable battery part. Since the present invention is to add a new function to an ordinary USB hub, the circuit of the USB hub has a reference diagram and is connected to a plurality of USB devices.

Referring to the chart of FIG. 3, the USB
When the hub is connected to the personal computer, the charge controller operates to start charging the rechargeable battery and the double layer capacitor. Products that consume less power, such as a mouse and keyboard, and self-powered USB devices can be used during charging. When a device that cannot operate only with pass power is connected and it detects a power shortage, it supplies power to the connected device from a rechargeable battery or double-layer capacitor. When the auxiliary power is no longer needed, the charging of the rechargeable battery is resumed and the flow is repeated.

[0009]

The price of the AC adapter is higher than the cost of the hub body. Most of the peripheral devices connected to the USB hub are devices such as a mouse and a keyboard that consume little power or operate by self-power. AC adapters are expensive and are often attached to USB hubs, but they are rarely needed. When the present invention plays an active part in the very few necessary occasions, AC is applied to the USB hub.
No need for an adapter. When the USB hub of the present invention continues to use a current exceeding the limit for a long time, it is conceivable that a battery or a double-layer capacitor may run out of power and a sufficient current may not be supplied to a connected device.
However, such a thing is extremely rare, and a current close to 500 mA is often required at the time of start-up. In most cases, the current shortage problem is solved without an AC adapter.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a connection diagram of the present invention.

FIG. 3 is a chart of the present invention.

[Explanation of symbols] 1 Double layer capacitor 2 rechargeable batteries 3 USB female connector A type 4 USB female connector B type 5 PCB board with built-in USB hub function 6 personal computer 7 Ports connecting to peripherals 8. Rechargeable battery

Claims (2)

[Claims] 1. A rechargeable battery or a double layer capacitor is incorporated in an internal circuit of a USB hub used by connecting to a personal computer, and the current of the rechargeable battery or the double layer capacitor and the current of the bus power are combined and connected. A USB hub that can supply sufficient current to a device when the current is insufficient to operate the device 2. A function of charging a rechargeable battery incorporated in a USB hub internal circuit. The function is realized by a circuit that supplies the optimum voltage and current to the rechargeable battery by using the power supplied from the USB bus power.