CN202205166U - Wireless passive keyboard based on wireless energy transmission - Google Patents
Wireless passive keyboard based on wireless energy transmission Download PDFInfo
- Publication number
- CN202205166U CN202205166U CN2011203271295U CN201120327129U CN202205166U CN 202205166 U CN202205166 U CN 202205166U CN 2011203271295 U CN2011203271295 U CN 2011203271295U CN 201120327129 U CN201120327129 U CN 201120327129U CN 202205166 U CN202205166 U CN 202205166U
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- computer end
- oscillatory
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Abstract
The utility model discloses a wireless passive keyboard based on wireless energy transmission, comprising a wireless keyboard, a computer end emitting circuit and a keyboard receiving end circuit, wherein the computer end emitting circuit is connected with a USB (universal serial bus) interface of a computer, the computer end emitting circuit is connected with the keyboard receiving end circuit by an electromagnetic coupling antenna in a wireless mode, and the keyboard receiving end circuit is connected with the power input end of the wireless keyboard. The computer end emitting circuit obtains energy from the USB interface, an oscillation circuit of the computer end emitting circuit generates stable high-frequency sine current, and then the current is amplified by a power amplification circuit to generate a high-frequency alternating magnetic field by a first LC (Line Circuit) oscillation circuit. Alternating voltage inducted by a second LC oscillation circuit in the high-frequency magnetic field is subjected to a rectifier circuit and a filtering voltage-stabilizing circuit, so as to generate stable dc voltage, and the dc voltage is supplied to the keyboard. The wireless passive keyboard realizes the wireless transmission of energy and needs no connecting cables and energy accumulation equipments such as batteries. The wireless passive keyboard based on wireless energy transmission is flexible and safe to use, is high in adaptability and is applicable to commercial and industrial purposes, households, and even field severe environments.
Description
Technical field
The utility model relates to a kind of Wireless Keyboard, especially relates to a kind of wireless and passive keyboard based on wireless energy transfer.
Background technology
Conventional keyboard is used the wired connection mode.Its connecting line in use brings a lot of inconvenience to the user, and dirigibility is very poor, and very not attractive in appearance in appearance.
The Wireless Keyboard that occurs has in the recent period been avoided the shortcoming of traditional wired keyboard through wireless communication technologys such as bluetooths.But it has realized wireless transmission of signal, and keyboard portion must rely on powered battery.It in use need regularly replace battery, and is very inconvenient.In addition, use battery can cause the increase of heavy metal pollution in a large number, endanger environment.
Summary of the invention
For overcoming present existing keyboard appearance problem not attractive in appearance and that battery is relied on; The purpose of the utility model is to provide a kind of wireless and passive keyboard based on wireless energy transfer; Adopted wireless energy transmission technology (WET); In use, the wireless and passive keyboard has been realized the wireless transmission of signal and energy simultaneously, need not energy storage devices such as any line and battery.
The technical scheme that the utility model adopts is:
Comprise Wireless Keyboard; It is characterized in that: also comprise computer end radiating circuit and keyboard receiving terminal circuit; The computer end radiating circuit is connected with the USB mouth of computing machine, and computer end radiating circuit and keyboard receiving terminal circuit are through the EM coupling wireless connections, and the keyboard receiving terminal circuit is connected with the power input of Wireless Keyboard.
Described computer end radiating circuit comprises filter capacitor, start-oscillation circuit, power amplification circuit and a LC oscillatory circuit; Primary coil in the one LC oscillatory circuit is wrapped in the outside of computer end radiating circuit encapsulation, and its filter capacitor is connected on two pins of computing machine USB mouth power supply output, and filter capacitor is parallelly connected with start-oscillation circuit simultaneously; Through with power amplification circuit that start-oscillation circuit connect after, to a parallelly connected LC oscillatory circuit, filter capacitor, start-oscillation circuit, power amplification circuit and this four part of a LC oscillatory circuit are altogether.
Described keyboard receiving terminal circuit comprises the 2nd LC oscillatory circuit, bridge rectifier circuit and capacitor filtering mu balanced circuit; The secondary coil of the 2nd LC oscillatory circuit is around the keyboard back side; The 2nd a LC oscillatory circuit and a LC oscillatory circuit are through the wireless connections of EM coupling mode; The 2nd LC oscillatory circuit is parallelly connected with bridge rectifier circuit; Seal in the capacitor filtering mu balanced circuit at last, capacitor filtering mu balanced circuit two ends connect the input of Wireless Keyboard power supply.
The beneficial effect that the utlity model has is:
The wireless and passive keyboard that the utlity model has has been realized the wireless transmission of energy, need not energy storage devices such as line or battery.Use flexible safety, adaptability is strong, is applicable to that commerce, industry and family use, even in the field extreme environment.
Description of drawings
Fig. 1 is based on the wireless and passive keyboard of wireless energy transfer always to scheme.
Fig. 2 is computer end radiating circuit figure.
Fig. 3 is keyboard receiving terminal circuit figure.
Among the figure: 1, primary coil, 2, filter capacitor, 3, start-oscillation circuit, 4, power amplification circuit, the 5, the one LC oscillatory circuit, 6, secondary coil, the 7, the 2nd LC oscillatory circuit, 8, bridge rectifier circuit, 9, the capacitor filtering mu balanced circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
As shown in Figure 1, comprise Wireless Keyboard based on the wireless and passive keyboard of wireless energy transfer, also comprise computer end radiating circuit and keyboard receiving terminal circuit; The computer end radiating circuit is connected with the USB mouth of computing machine; Acquisition is used for the energy of wireless transmission; Computer end radiating circuit and keyboard receiving terminal circuit are through the EM coupling wireless connections, and the keyboard receiving terminal circuit is connected with the power input of Wireless Keyboard, to keyboard energy is provided.
As shown in Figure 2, described computer end radiating circuit comprises filter capacitor 2, start-oscillation circuit 3, power amplification circuit 4 and a LC oscillatory circuit 5; Primary coil 1 in the one LC oscillatory circuit 5 is wrapped in the outside of computer end radiating circuit encapsulation, and its filter capacitor 2 and computing machine USB mouth power supply output-parallel are used for the harmonic wave of elimination USB power supply, offers the start-oscillation circuit 3 parallelly connected with filter capacitor 2.Start-oscillation circuit 3 adopts the not gate of not gate chip 74LS10 and RC vibration to form, and is used to produce stable 10MHz high-frequency current through capacitor charge and discharge; The power amplification circuit 4 of electric current through connecting with start-oscillation circuit 3, power amplification circuit 4 is made up of the not gate of three parallel connections, still utilizes the not gate on the not gate chip 74LS10, makes output power increase.Last electric current produces high-frequency alternating magnetic field to a LC oscillatory circuit 5 of parallel connection, through primary coil to the spatial emission energy.Filter capacitor 2, start-oscillation circuit 3, power amplification circuit 4 and a LC oscillatory circuit 5 these four parts are altogether.
As shown in Figure 3, the keyboard receiving terminal circuit comprises the 2nd LC oscillatory circuit 7, bridge rectifier circuit 8 and capacitor filtering mu balanced circuit 9; The secondary coil 6 of the 2nd LC oscillatory circuit 7 is around the keyboard back side, and the capacitive part in the 2nd LC oscillatory circuit 7, bridge rectifier circuit 8, capacitor filtering mu balanced circuit 9 are placed in the cabinet of keyboard back.The 2nd a LC oscillatory circuit 7 and a LC oscillatory circuit 5 are through the wireless connections of EM coupling mode, and secondary coil obtains to transmit the energy of coming from primary coil through the electromagnetic field of inductive spacing alternation.The 2nd LC oscillatory circuit 7 is parallelly connected with bridge rectifier circuit 8, and the sinusoidal ac that makes the 2nd LC oscillatory circuit 7 produce through bridge rectifier changes direct current into.Seal in capacitor filtering mu balanced circuit 9 at last; The electric capacity through parallel connection and the voltage stabilizing chip ADP150 of the series connection harmonic wave in can the elimination DC current; Because primary coil and secondary coil variable in distance can change to the magnitude of voltage after the rectification, voltage stabilizing chip ADP150 also is stabilized in magnitude of voltage in 3.0 ~ 3.3V scope of keyboard need of work.Capacitor filtering mu balanced circuit 9 two ends directly connect the input of Wireless Keyboard power supply, for keyboard provides burning voltage input power supply.
Claims (3)
1. the wireless and passive keyboard based on wireless energy transfer comprises Wireless Keyboard; It is characterized in that: also comprise computer end radiating circuit and keyboard receiving terminal circuit; The computer end radiating circuit is connected with the USB mouth of computing machine, and computer end radiating circuit and keyboard receiving terminal circuit are through the EM coupling wireless connections, and the keyboard receiving terminal circuit is connected with the power input of Wireless Keyboard.
2. a kind of wireless and passive keyboard based on wireless energy transfer according to claim 1 is characterized in that: described computer end radiating circuit comprises filter capacitor (2), start-oscillation circuit (3), power amplification circuit (4) and a LC oscillatory circuit (5); Primary coil (1) in the one LC oscillatory circuit (5) is wrapped in the outside of computer end radiating circuit encapsulation, and its filter capacitor (2) is connected on two pins of computing machine USB mouth power supply output, and filter capacitor (2) is parallelly connected with start-oscillation circuit (3) simultaneously; Through with power amplification circuit (4) that start-oscillation circuit (3) connect after, to a parallelly connected LC oscillatory circuit (5), filter capacitor (2), start-oscillation circuit (3), power amplification circuit (4) and this four part of LC oscillatory circuit (5) are altogether.
3. a kind of wireless and passive keyboard based on wireless energy transfer according to claim 1 is characterized in that: described keyboard receiving terminal circuit comprises the 2nd LC oscillatory circuit (7), bridge rectifier circuit (8) and capacitor filtering mu balanced circuit (9); The secondary coil (6) of the 2nd LC oscillatory circuit (7) is around the keyboard back side; The 2nd LC oscillatory circuit (7) passes through the wireless connections of EM coupling mode with a LC oscillatory circuit (5); The 2nd LC oscillatory circuit (7) is connected with bridge rectifier circuit (8); Seal in capacitor filtering mu balanced circuit (9) at last, capacitor filtering mu balanced circuit (9) two ends connect the input of Wireless Keyboard power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203271295U CN202205166U (en) | 2011-09-02 | 2011-09-02 | Wireless passive keyboard based on wireless energy transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203271295U CN202205166U (en) | 2011-09-02 | 2011-09-02 | Wireless passive keyboard based on wireless energy transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202205166U true CN202205166U (en) | 2012-04-25 |
Family
ID=45969278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203271295U Expired - Fee Related CN202205166U (en) | 2011-09-02 | 2011-09-02 | Wireless passive keyboard based on wireless energy transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202205166U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854992A (en) * | 2012-09-12 | 2013-01-02 | 北京工业大学 | Self-generating wireless keyboard based on piezoelectric effect |
-
2011
- 2011-09-02 CN CN2011203271295U patent/CN202205166U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854992A (en) * | 2012-09-12 | 2013-01-02 | 北京工业大学 | Self-generating wireless keyboard based on piezoelectric effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20140902 |
|
| EXPY | Termination of patent right or utility model |