CN106849934A - A kind of press key locking keyboard - Google Patents
A kind of press key locking keyboard Download PDFInfo
- Publication number
- CN106849934A CN106849934A CN201710238460.1A CN201710238460A CN106849934A CN 106849934 A CN106849934 A CN 106849934A CN 201710238460 A CN201710238460 A CN 201710238460A CN 106849934 A CN106849934 A CN 106849934A
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- CN
- China
- Prior art keywords
- keyboard
- circuit
- electric capacity
- main control
- control chip
- 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.)
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/965—Switches controlled by moving an element forming part of the switch
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The present invention proposes a kind of press key locking keyboard, belongs to computer fittings technical field, and the present invention is provided with press key locking circuit on the data line between keyboard circuit and USB interface；Described press key locking circuit, including：Main control chip, a key lock switch, pull-up resistor, resistance, triode, relay, connecting valve, electrification reset circuit, power circuit and a crystal oscillating circuit；As common computer keyboard, difference is have one button of many settings in the upper right corner of the keyboard to the keyboard body, and the button can realize the locking of other whole buttons of keyboard, other keypress functions is failed.When user needs keyboard operation computer again, the button can be again clicked, other whole buttons of keyboard are unlocked, user can normally use keyboard, the small user's office of Portable computer desk of the present invention prevents keys of keyboard by mistake by easy to use, simple structure.
Description
Technical field
The present invention relates to computer fittings technical field, and in particular to a kind of press key locking keyboard.
Background technology
The fast development of information technology and economy causes that computer is quickly popularized, and nowadays computer is used in industry-by-industry；Keyboard
As the part that computer is essential, also obtain and be widely applied.Many user computer tables using computer are all smaller, remove
Placed outside computer monitor and keyboard on computer desk, computer desk remaining space very little, when needing to be handled official business on computer desk,
Such as fill in and read and make comments paper material, such keyboard is easily overwritten, button be easy to by by mistake by so that there is maloperation in computer.
The content of the invention
In view of the shortcomings of the prior art, the present invention proposes a kind of press key locking keyboard, with reach realization prevent keyboard by
The purpose that key is pressed by mistake.
A kind of press key locking keyboard, button is provided with the data line between keyboard circuit and USB interface
Lock-in circuit；
Described press key locking circuit, including：Main control chip, a key lock switch, pull-up resistor, first resistor, one
Triode, relay, connecting valve, electrification reset circuit, power circuit and crystal oscillating circuit；
Described key lock switch is arranged at surface of keyboard, and a key lock switchs one end ground connection, and the other end is connected simultaneously
One end of pull-up resistor and the input of main control chip, the other end connection+5V of pull-up resistor；
Described first resistor one end connects the output end of main control chip, the base stage of other end connecting triode, triode
Emitter stage connection+5V, the input of the collector connection relay of triode, the output end connecting valve of relay is described
Connecting valve be arranged on the data line between keyboard circuit and USB interface；
Described electrification reset circuit, power circuit and crystal oscillating circuit are connected with main control chip.
Described key lock switch, volume is less than other buttons on keyboard, and height is less than other buttons on keyboard.
Described electrification reset circuit, including an electric capacity and second resistance, wherein, one end connection+5V of electric capacity, electric capacity
The other end simultaneously connect main control chip RST interfaces and second resistance one end, second resistance the other end ground connection.
Described power circuit, including an electric capacity, one end of the electric capacity connect the VCC ends of+5V and main control chip simultaneously,
The other end of electric capacity connects the GND ends of main control chip, and is grounded.
Described crystal oscillating circuit, including crystal oscillator, the first electric capacity and the second electric capacity, the one of described crystal oscillator
End connects one end of the first electric capacity and the XTAL1 ends of main control chip simultaneously, and the other end of described crystal oscillator is connected simultaneously
One end of second electric capacity and the XTAL2 ends of main control chip, the other end of the first electric capacity are connected with the other end of the second electric capacity, and
Ground connection.
Advantage of the present invention：
The present invention proposes a kind of press key locking keyboard, its main body as common computer keyboard, difference be
The upper right corner of the keyboard have a button is set, the button can realize the locking of other whole buttons of keyboard, make other by
Key disabler.When user needs keyboard operation computer again, the button, other whole button quilts of keyboard can be again clicked
Unblock, user can normally use keyboard, the small user's office of Portable computer desk of the present invention, prevent keys of keyboard mistake by,
It is easy to use, simple structure.
Brief description of the drawings
Fig. 1 is the press key locking keyboard schematic diagram of an embodiment of the present invention；
Fig. 2 is the press key locking circuit theory diagrams of an embodiment of the present invention.
Specific embodiment
An embodiment of the present invention is described further below in conjunction with the accompanying drawings.
In the embodiment of the present invention, as shown in figure 1, press key locking keyboard 1, a key lock is provided with the surface of keyboard upper right corner
Switch 2, described key lock switch 2 is smaller than common button, and the key tops of the button are upper with keyboard
Surface distance is smaller than common key-press, can effectively prevent the button by by mistake by；
In the embodiment of the present invention, as shown in Fig. 2 being set on data line between keyboard circuit and USB interface
It is equipped with press key locking circuit；Described press key locking circuit, including：STC989C52 main control chips U1, a key lock switch K1,
Pull-up resistor R1, first resistor R2, triode Q1, relay RL1, connecting valve K2, electrification reset circuit, a power circuit
And crystal oscillating circuit；
In the embodiment of the present invention, key lock switch K1 one end ground connection, the other end connects one end of pull-up resistor R1 simultaneously
With the P1.5 ends of main control chip U1, the other end connection+5V of pull-up resistor R1；
In the embodiment of the present invention, first resistor R2 one end connects the P0.5 ends of main control chip, other end connecting triode Q1
Base stage, the input of the collector connection relay RL1 of the emitter stage connection+5V, triode Q1 of triode Q1, relay
The output end connecting valve K2 of RL1, the data that described connecting valve K2 is arranged between keyboard circuit and USB interface are passed
On defeated line；Electrification reset circuit, power circuit and crystal oscillating circuit are connected with main control chip.
In the embodiment of the present invention, electrification reset circuit, including an electric capacity C2 and second resistance R3, wherein, electric capacity C2's
The other end of one end connection+5V, electric capacity C2 connects the RST interfaces of main control chip and one end of second resistance R3, the second electricity simultaneously
Hinder the other end ground connection of R3.
In the embodiment of the present invention, power circuit, including one end of an electric capacity C4, electric capacity C4 connects+5V and master simultaneously
The VCC ends of chip are controlled, the other end of electric capacity C4 connects the GND ends of main control chip, and is grounded.
In the embodiment of the present invention, crystal oscillating circuit, including crystal oscillator Y1, the first electric capacity C3 and the second electric capacity C5, it is described
One end of crystal oscillator Y1 connect one end of the first electric capacity C3 and the XTAL1 ends of main control chip simultaneously, described crystal shakes
The other end for swinging device Y1 connects one end of the second electric capacity C5 and the XTAL2 ends of main control chip, the other end of the first electric capacity C3 simultaneously
The other end with the second electric capacity C5 is connected, and is grounded.
In the embodiment of the present invention, after computer expert electrically activates, electricity, keyboard switch circuit original state connecting valve on keyboard
K2 is closure state, and because keyboard USB data line is in the conduction state, keyboard can be used normally；The keyboard is carried out usually
When computation as common keyboard occupation mode；When keyboard is not used, but done using computer desk
When public, user can push button a key lock and switch 2, GPIO mouthfuls of P0.5 output high level Q1 cut-off, and RL1 disconnects, K2
Disconnect, keyboard USB data line disconnects, keyboard button function failure, so other whole buttons are locked, keypress function failure,
User can just be handled official business on computer desk, even if the file being placed on keyboard is pressed onto keyboard, due to keyboard
It is locked, therefore keyboard will not cause computer maloperation occur；When user needs keyboard operation computer again, can click again by
The key lock of key one switch 2, other whole buttons of keyboard are unlocked, and user can normally use keyboard.
Claims (5)
1. a kind of press key locking keyboard, it is characterised in that set on the data line between keyboard circuit and USB interface
It is equipped with press key locking circuit；
Described press key locking circuit, including：Main control chip, a key lock switch, pull-up resistor, first resistor, three poles
Pipe, relay, connecting valve, electrification reset circuit, power circuit and crystal oscillating circuit；
Described key lock switch is arranged at surface of keyboard, and a key lock switchs one end ground connection, and the other end connects pull-up simultaneously
One end of resistance and the input of main control chip, the other end connection+5V of pull-up resistor；
Described first resistor one end connects the output end of main control chip, the base stage of other end connecting triode, the hair of triode
Emitter-base bandgap grading connection+5V, the input of the collector connection relay of triode, the output end connecting valve of relay, described company
Switch is connect to be arranged on the data line between keyboard circuit and USB interface；
Described electrification reset circuit, power circuit and crystal oscillating circuit are connected with main control chip.
2. press key locking keyboard according to claim 1, it is characterised in that described key lock switch, volume is less than
Other buttons on keyboard, and height is less than other buttons on keyboard.
3. press key locking keyboard according to claim 1, it is characterised in that described electrification reset circuit, including one
Electric capacity and second resistance, wherein, one end connection+5V of electric capacity, the other end of electric capacity connect simultaneously main control chip RST interfaces and
One end of second resistance, the other end ground connection of second resistance.
4. press key locking keyboard according to claim 1, it is characterised in that described power circuit, including an electric capacity,
One end of the electric capacity connects the VCC ends of+5V and main control chip simultaneously, and the other end of electric capacity connects the GND ends of main control chip, and connects
Ground.
5. press key locking keyboard according to claim 1, it is characterised in that described crystal oscillating circuit, including crystal oscillation
Device, the first electric capacity and the second electric capacity, one end of described crystal oscillator connect one end and the main control chip of the first electric capacity simultaneously
XTAL1 ends, the other end of described crystal oscillator connects one end of the second electric capacity and the XTAL2 ends of main control chip simultaneously,
The other end of the first electric capacity is connected with the other end of the second electric capacity, and is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710238460.1A CN106849934B (en) | 2017-04-13 | 2017-04-13 | Key locking keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710238460.1A CN106849934B (en) | 2017-04-13 | 2017-04-13 | Key locking keyboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106849934A true CN106849934A (en) | 2017-06-13 |
| CN106849934B CN106849934B (en) | 2023-04-28 |
Family
ID=59147676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710238460.1A Active CN106849934B (en) | 2017-04-13 | 2017-04-13 | Key locking keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106849934B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6211475B1 (en) * | 1999-01-14 | 2001-04-03 | Nec Corporation | Keyboard with key lock function |
| CN101241396A (en) * | 2007-02-06 | 2008-08-13 | 鸿富锦精密工业（深圳）有限公司 | Keyboard capable of locking key |
| US20090050450A1 (en) * | 2007-08-22 | 2009-02-26 | Chun-Pin Cheng | Computer device with keyboard lock function, and method of performing keyboard lock in the computer device |
| CN101452340A (en) * | 2007-11-30 | 2009-06-10 | 鸿富锦精密工业（深圳）有限公司 | Keyboard |
| TW200928872A (en) * | 2007-12-21 | 2009-07-01 | Hon Hai Prec Ind Co Ltd | Keyboard |
-
2017
- 2017-04-13 CN CN201710238460.1A patent/CN106849934B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6211475B1 (en) * | 1999-01-14 | 2001-04-03 | Nec Corporation | Keyboard with key lock function |
| CN101241396A (en) * | 2007-02-06 | 2008-08-13 | 鸿富锦精密工业（深圳）有限公司 | Keyboard capable of locking key |
| US20090050450A1 (en) * | 2007-08-22 | 2009-02-26 | Chun-Pin Cheng | Computer device with keyboard lock function, and method of performing keyboard lock in the computer device |
| CN101452340A (en) * | 2007-11-30 | 2009-06-10 | 鸿富锦精密工业（深圳）有限公司 | Keyboard |
| TW200928872A (en) * | 2007-12-21 | 2009-07-01 | Hon Hai Prec Ind Co Ltd | Keyboard |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106849934B (en) | 2023-04-28 |
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