CN2859780Y - Private keyboard for teaching courseware demonstration capable of remote control - Google Patents
Private keyboard for teaching courseware demonstration capable of remote control Download PDFInfo
- Publication number
- CN2859780Y CN2859780Y CN 200520124620 CN200520124620U CN2859780Y CN 2859780 Y CN2859780 Y CN 2859780Y CN 200520124620 CN200520124620 CN 200520124620 CN 200520124620 U CN200520124620 U CN 200520124620U CN 2859780 Y CN2859780 Y CN 2859780Y
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- CN
- China
- Prior art keywords
- relay
- keyboard
- plastic paper
- sheet metal
- button
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Input From Keyboards Or The Like (AREA)
Abstract
The present utility relates to a remote control key dedicated for teaching courseware demo which comprise key pad main body, press key, electric plastic paper, metal foil, code-possessing radio transmitting and receiving circuit, and relay. Code-possessing radio transmitting and receiving circuit is connected with relay which is respectively connected with conductive metal sheet and music chip by conductive wire. Metal foil is respectively fixed on upper and lower plastic paper possessing circuit under the key pad main body. When radio receiving circuit supply power to the relay, then relay switch on, and upper metal sheet contact the lower sheet, that is key is pressed. At the same time, music chip transmits the audio file and play it by self-installed speaker. The set buttons are: Enter, Page Up, Page Down, other keys are mounted according to need. The utility has simple structure and is convenient for using.
Description
Technical field
The utility model relates to a kind of multimedia tool, specifically a kind of keyboard special of remote-controlled teaching courseware demonstration.
Background technology
We know, existing in the market keyboard all is all buttons to be concentrated on a panel use, its form also has only the band transmission line and utilizes two kinds of forms of infrared transmission data, and employed button has only fixing several when courseware is demonstrated, therefore can't be implemented in and say and stand in the control that demonstration is switched to courseware on the optional position class hour, promptly allow to realize the infrared transmission keyboard of this function, also can be difficult to realize the performance of this function because of reason such as direction, distance, volume be big.Cause the dumb of courseware demonstration and teaching person position.
Summary of the invention
The utility model is for overcoming above-mentioned the deficiencies in the prior art, and a kind of keyboard special of remote-controlled teaching courseware demonstration simple in structure, easy to use is provided.
The purpose of this utility model is to adopt following technical proposals to realize: a kind of keyboard special of remote-controlled teaching courseware demonstration, it includes keyboard body, button, charged road plastic paper, sheet metal, band coding radio transmission and receiving circuit and relay, band coding radio receiver circuit is connected with relay, relay is connected with Music Clip with conductive sheet metal respectively by lead, and sheet metal is separately fixed on the up and down two-layer charged road plastic paper under the keyboard body button.
Described sheet metal is divided into two up and down, is separately fixed on the button hard contact of two-layer charged road plastic paper up and down, with the hard contact conducting of button.
On keyboard body, be provided with mains switch and indicator light.
The utility model is connected with relay by a band coding radio receiver circuit, come the break-make of control relay by receiving circuit, relay is connected with conductive sheet metal by lead, sheet metal is placed in the two-layer charged road plastic paper up and down under the keyboard respectively, sheet metal is divided into two up and down, last slice be fixed on the button hard contact of epipelagic zone circuit plastic paper, make it hard contact conducting with keyboard, lower floor is fixed on the button hard contact of lower floor's charged road plastic paper, make it the hard contact conducting with keyboard equally, its fixing means can be in the method for paste.When radio receiver circuit is powered to relay, relay is connected, and sheet metal last slice touches down sheet, is equivalent to supress the keyboard of the setting of installing.The button of its setting mainly contains three: Enter, Page Up, Page Down, all the other each strong can settings according to concrete needs.For example: the PowerPoint in the Microsoft Office software only gets final product with Page Up, Page Down two keys during demonstration.
Wherein No. one relay is connected in the pronunciation chip, and when by radio receiver circuit relay being powered, when relay was connected, Music Clip sent the audio files that writes, by carrying loud speaker with sound playing.
The utlity model has characteristics such as simple in structure, easy to use.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is circuit theory diagrams of the present utility model;
Fig. 3 is a receiving circuit schematic diagram of the present utility model;
Fig. 4 is a receiving circuit schematic diagram of the present utility model.
1. buttons among the figure, 2. sheet metal, 3 epipelagic zone circuit plastic papers., the 4. charged road of lower floor plastic paper, 5. radio receiver circuit, 6. relay, 7. Music Clip, 8. loud speaker.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment: structure as shown in Figure 1 and Figure 2, band coding radio receiver circuit 5 is connected with relay 6, relay 6 is connected with Music Clip 7 with conductive sheet metal 2 respectively by lead, and sheet metal 2 is separately fixed on the up and down two-layer charged road plastic paper 3,4 under the keyboard body button 1.Sheet metal 2 is divided into two up and down, is separately fixed on button 1 hard contact of two-layer charged road plastic paper 3,4 up and down, with the hard contact conducting of button 1.Its fixing means can be in the method for paste.When 5 pairs of relays of radio receiver circuit 6 power supply, relay 6 is connected, and sheet metal 2 last slice touches down sheet, is equivalent to supress the keyboard 1 of the setting of installing.The button of its setting mainly contains three: Enter, Page Up, PageDown, all the other each strong can settings according to concrete needs.For example: the PowerPoint in the Microsoft Office software only gets final product with Page Up, Page Down two keys during demonstration.
Wherein No. one relay 6 is connected in pronunciation chip 7, and when being powered by 5 pairs of relays of radio receiver circuit 6, when relay 6 was connected, Music Clip 7 sent the audio files that writes, by carrying loud speaker 8 with sound playing.
On keyboard body, be provided with mains switch and indicator light.
As shown in Figure 3, the radio remote controller special circuit that radio receiver circuit 5 adopts in the IC circuit, IC has seven pin: 1 pin connects positive source, working voltage 3V:2 pin ground connection: 3 pin, the external concussion electric capacity of 5 pin, the inductance frequency is about 49MHz; 4 pin are empty pin, and are on the shelf; 6 pin are data input pin, can send coded data signal to; 7 pin are the external antenna end, and transmitting range is about the 60m current sinking and is about 2mA.The overall dimension of IC circuit is 30 * 10 * 2.2mm, and respectively there is the external fin of a radius 3mm at two ends with fixing empty.Coil with radius 1.2mm enamelled wire radius be on the 10mm pole around 2 circles, pitch of turn is 2-3mm.
As shown in Figure 4, radio transmitter circuit adopts the radio remote controller special circuit in the IC circuit, and 1 pin connects positive source, working voltage 3V:2 pin ground connection: 3 pin, the external concussion electric capacity of 5 pin, and the inductance frequency is about 49MHz; 4 pin are empty pin, and are on the shelf; 6 pin are the receiving circuit output, the alert stroke 3V voltage that amplifies; 7 pin are the external antenna end.
Claims (3)
1. the keyboard special of a remote-controlled teaching courseware demonstration, it includes keyboard body, button, charged plastic paper, sheet metal, band coding radio transmission and receiving circuit and relay, it is characterized in that: band coding radio receiver circuit is connected with relay, relay is connected with Music Clip with conductive sheet metal respectively by lead, and sheet metal is separately fixed on the up and down two-layer charged road plastic paper under the keyboard body button.
2. the keyboard special of a kind of remote-controlled teaching courseware demonstration according to claim 1, it is characterized in that: described sheet metal is divided into two up and down, be separately fixed on the button hard contact of two-layer charged road plastic paper up and down, with the hard contact conducting of button.
3. the keyboard special of a kind of remote-controlled teaching courseware demonstration according to claim 1 is characterized in that: be provided with mains switch and indicator light on keyboard body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520124620 CN2859780Y (en) | 2005-11-11 | 2005-11-11 | Private keyboard for teaching courseware demonstration capable of remote control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520124620 CN2859780Y (en) | 2005-11-11 | 2005-11-11 | Private keyboard for teaching courseware demonstration capable of remote control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859780Y true CN2859780Y (en) | 2007-01-17 |
Family
ID=37612638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520124620 Expired - Fee Related CN2859780Y (en) | 2005-11-11 | 2005-11-11 | Private keyboard for teaching courseware demonstration capable of remote control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2859780Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121948A (en) * | 2016-02-25 | 2017-09-01 | 北京富华胜科技中心 | Novel power supply auto switching system and combustion gas apparent source automatically cut off system |
-
2005
- 2005-11-11 CN CN 200520124620 patent/CN2859780Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121948A (en) * | 2016-02-25 | 2017-09-01 | 北京富华胜科技中心 | Novel power supply auto switching system and combustion gas apparent source automatically cut off system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |