Patent Application
20090102418
The present invention relates generally to a manual dynamo recharging device, for example, a manual dynamo recharging device that charges a rechargeable battery to recharge an electric portable device battery, such as a cell phone, with or without using a DC to DC converter.
Devices are known for mechanically charging batteries of electronic portable instruments like a cell phone. Such a device serves as a back-up charging device in case there is no wall socket or compatible wall socket electrical charger available.
Examples of such devices include those described in U.S. Pat. Nos. 7,019,492, 7,049,708 and 7,239,237, and US Patent Application 20040204180.
In one embodiment of the present invention, a manual dynamo recharging device is provided in which manual dynamo charges a rechargeable battery to recharge an electric portable device battery with or without using a DC to DC converter. The recharging device includes a housing containing a roller attached to a dynamo electrically connected to a rechargeable battery. The rechargeable battery is electrically connected, via a DC to DC converter or directly, to a connector through which a portable electric device battery may be recharged. Manually, using one hand, moving the housing back and forth over a surface, with the roller pressed onto that surface, causes the roller to roll and operate the dynamo, thereby creating electricity to recharge the rechargeable battery of the device.
In yet another embodiment of the present invention, a recharging device including a roller, a dynamo, with or without a DC to DC converter, is embedded in an electric portable device, such as a cell phone. Manually moving the electric portable device back and forth over a surface with one hand, with the roller pressed onto that surface, causes the roller to roll and operate the dynamo to create electricity to recharge the rechargeable battery of the portable device.
There is thus provided in accordance with an embodiment of the present invention a manual dynamo recharging device including a roller disposed in a housing and arranged for manually pressing and rolling against a surface with one hand, a dynamo connected to the roller, wherein rotation of the roller operates the dynamo to create electricity, and a rechargeable battery electrically connected to the dynamo through electrical circuitry, wherein manually pressing and rolling the roller against the surface operates the dynamo to create electricity to recharge the rechargeable battery, which is electrically connected to an electric portable device battery.
In one embodiment, the dynamo creates higher voltage than the recharging battery of the device, thus charging it directly, and the voltage of the rechargeable battery of the device is high enough to recharge the portable device battery directly.
In one embodiment, the electrical circuitry includes a DC to DC converter for converting DC voltage of the rechargeable battery of the device to another DC voltage for the portable electric device battery.
In one embodiment, the electrical circuitry includes a capacitor for storing electricity for recharging the rechargeable battery.
In one embodiment, the recharging device is embedded into an electric portable device, and manually moving the portable device back and forth over the surface with one hand while the roller is pressed and rolled against the surface operates the dynamo to create electricity to recharge a battery of the electric portable device.
In one embodiment, the roller has a removable cover.
In one embodiment, the recharging device has grooves around which a connecting cord is wound and is an integral part of the device.
There is also provided in accordance with an embodiment of the present invention a method for recharging an electric portable device battery including providing a recharging device that includes a roller disposed in a housing and arranged for manually pressing and rolling against a surface, a dynamo connected to the roller, wherein rotation of the roller operates the dynamo to create electricity, and a rechargeable battery electrically connected to the dynamo through electrical circuitry, and using one hand manually pressing and rolling the roller against the surface thereby to operate the dynamo to create electricity to recharge the rechargeable battery, which recharges an electric portable device battery electrically connected thereto.
There is also provided in accordance with an embodiment of the present invention manual dynamo recharging device including a roller disposed in a housing and arranged for manually pressing and rolling against a surface, a dynamo connected to the roller, wherein rotation of the roller operates the dynamo to create electricity, and an electric portable device battery electrically connected to the dynamo through electrical circuitry, wherein manually pressing and moving the roller against the surface operates the dynamo to create electricity to recharge the electric portable device battery. In other words, in this embodiment, the recharger recharges the electric portable device battery without an intermediate rechargeable battery.
The disclosed technique will be understood and appreciated more fully from the following detailed description taken in conjunction with the drawings in which:
Reference is now made to
As seen in
A gear may be used to increase the rotation speed of the roller 3 transmitted to shaft 15. Dynamo 16 may be, without limitation, an electromagnetic generator of electricity with a stator and rotor or a DC motor, well known in the art. Rotation of shaft 15, clockwise or counterclockwise, rotates the rotor of dynamo 16 to create an alternating current (AC) or DC voltage, which by utilizing a diode bridge in circuit 18, has the same polarity regardless of the rotation direction of roller 3. As is known in the art, in the case where AC is created by the dynamo, the AC voltage is converted to DC by electrical circuitry 18, such as by a full-wave rectifier that converts the AC voltage into DC voltage regardless of whether the roller 3 turns clockwise or counterclockwise.
The use of roller 3 in the present invention enables a user to generate electricity with one hand, in contrast with cranks of the prior art which require using both hands—one for the crank and the other for holding the device.
Dynamo 16 may be electrically connected to a rechargeable battery 17 and to the electrical circuitry 18 by connection with a socket 19. The electrical circuitry 18 may also include a capacitor or super capacitor for storing electricity for recharging the rechargeable battery 17, or alternatively, for directly recharging the cell phone battery without need for rechargeable battery 17.
The electrical circuitry 18 may include a DC to DC converter for converting the DC voltage of the rechargeable battery 17 to another DC voltage for the portable electric device battery.
Reference is now made to
It is appreciated that various features of the invention which are, for clarity, described in the contexts of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable subcombination.
