CN106849934B - Key locking keyboard - Google Patents
Key locking keyboard Download PDFInfo
- Publication number
- CN106849934B CN106849934B CN201710238460.1A CN201710238460A CN106849934B CN 106849934 B CN106849934 B CN 106849934B CN 201710238460 A CN201710238460 A CN 201710238460A CN 106849934 B CN106849934 B CN 106849934B
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- keyboard
- key
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- circuit
- resistor
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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
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- 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 invention provides a key locking keyboard, which belongs to the technical field of computer accessories, and a key locking circuit is arranged on a data transmission line between a keyboard key circuit and a USB interface; the key locking circuit comprises: the device comprises a main control chip, a one-key locking switch, a pull-up resistor, a triode, a relay, a connecting switch, a power-on reset circuit, a power circuit and a crystal oscillator circuit; the keyboard main body is the same as a common computer keyboard, and is different in that one more key is arranged at the upper right corner of the keyboard, and the key can lock all other keys of the keyboard, so that other key functions are disabled. When the user needs the keyboard to operate the computer, the user can press the key again, all other keys of the keyboard are unlocked, and the user can normally use the keyboard.
Description
Technical Field
The invention relates to the technical field of computer accessories, in particular to a key locking keyboard.
Background
The rapid development of information technology and economy makes computers rapidly popular, and computers are used in various industries nowadays; the keyboard is also widely used as an indispensable part of a computer. Many users who use computers have smaller computer tables, and besides a computer display and a keyboard are placed on the computer tables, the residual space of the computer tables is small, and when the users need to work on the computer tables, if paper materials are filled in, the keyboard is easy to cover, keys are easy to be pressed by mistake, so that misoperation of the computer occurs.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a key locking keyboard so as to achieve the purpose of preventing the misoperation of keys of the keyboard.
A key locking keyboard, a key locking circuit is arranged on a data transmission line between a keyboard key circuit and a USB interface;
the key locking circuit comprises: the device comprises a main control chip, a one-key locking switch, a pull-up resistor, a first resistor, a triode, a relay, a connecting switch, a power-on reset circuit, a power circuit and a crystal oscillator circuit;
the one-key locking switch is arranged on the surface of the keyboard, one end of the one-key locking switch is grounded, the other end of the one-key locking switch is simultaneously connected with one end of the pull-up resistor and the input end of the main control chip, and the other end of the pull-up resistor is connected with +5V;
one end of the first resistor is connected with the output end of the main control chip, the other end of the first resistor is connected with the base electrode of the triode, the emitting electrode of the triode is connected with +5V, the collecting electrode of the triode is connected with the input end of the relay, the output end of the relay is connected with the switch, and the connection switch is arranged on a data transmission line between the keyboard key circuit and the USB interface;
the power-on reset circuit, the power supply circuit and the crystal oscillator circuit are all connected with the main control chip.
The one-key locking switch is smaller than other keys on the keyboard in size and smaller than other keys on the keyboard in height.
The power-on reset circuit comprises a capacitor and a second resistor, wherein one end of the capacitor is connected with +5V, the other end of the capacitor is simultaneously connected with a RST interface of the main control chip and one end of the second resistor, and the other end of the second resistor is grounded.
The power supply circuit comprises a capacitor, wherein one end of the capacitor is connected with +5V and the VCC end of the main control chip at the same time, and the other end of the capacitor is connected with the GND end of the main control chip and is grounded.
The crystal oscillator circuit comprises a crystal oscillator, a first capacitor and a second capacitor, one end of the crystal oscillator is simultaneously connected with one end of the first capacitor and the XTAL1 end of the main control chip, the other end of the crystal oscillator is simultaneously connected with one end of the second capacitor and the XTAL2 end of the main control chip, and the other end of the first capacitor is connected with the other end of the second capacitor and grounded.
The invention has the advantages that:
the invention provides a key locking keyboard, the main body of the key locking keyboard is the same as that of a common computer keyboard, and the key locking keyboard is characterized in that one key is additionally arranged at the upper right corner of the keyboard, and the key can lock all other keys of the keyboard, so that the functions of other keys are disabled. When the user needs the keyboard to operate the computer, the user can press the key again, all other keys of the keyboard are unlocked, and the user can normally use the keyboard.
Drawings
FIG. 1 is a schematic diagram of a key lock keyboard according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a key lock circuit according to an embodiment of the present invention.
Detailed Description
An embodiment of the present invention will be further described with reference to the accompanying drawings.
In the embodiment of the invention, as shown in fig. 1, a key locking keyboard 1 is provided with a key locking switch 2 at the upper right corner of the surface of the keyboard, the key locking switch 2 is smaller than a common key, and the distance between the key top of the key and the upper surface of the keyboard is smaller than that of the common key, so that the key can be effectively prevented from being pressed by mistake;
in the embodiment of the invention, as shown in fig. 2, a key locking circuit is arranged on a data transmission line between a key circuit of a keyboard and a USB interface; the key locking circuit comprises: STC989C52 master control chip U1, a key locking switch K1, a pull-up resistor R1, a first resistor R2, a triode Q1, a relay RL1, a connecting switch K2, a power-on reset circuit, a power supply circuit and a crystal oscillator circuit;
in the embodiment of the invention, one end of a one-key locking switch K1 is grounded, the other end of the one-key locking switch K1 is simultaneously connected with one end of a pull-up resistor R1 and the P1.5 end of a main control chip U1, and the other end of the pull-up resistor R1 is connected with +5V;
in the embodiment of the invention, one end of a first resistor R2 is connected with a P0.5 end of a main control chip, the other end of the first resistor R2 is connected with a base electrode of a triode Q1, an emitter electrode of the triode Q1 is connected with +5V, a collector electrode of the triode Q1 is connected with an input end of a relay RL1, an output end of the relay RL1 is connected with a switch K2, and the connection switch K2 is arranged on a data transmission line between a keyboard key circuit and a USB interface; the power-on reset circuit, the power supply circuit and the crystal oscillator circuit are all connected with the main control chip.
In the embodiment of the invention, the power-on reset circuit comprises a capacitor C2 and a second resistor R3, wherein one end of the capacitor C2 is connected with +5V, the other end of the capacitor C2 is simultaneously connected with a RST interface of a main control chip and one end of the second resistor R3, and the other end of the second resistor R3 is grounded.
In the embodiment of the invention, the power supply circuit comprises a capacitor C4, one end of the capacitor C4 is connected with +5V and the VCC end of the main control chip at the same time, and the other end of the capacitor C4 is connected with the GND end of the main control chip and grounded.
In the embodiment of the invention, the crystal oscillator circuit comprises a crystal oscillator Y1, a first capacitor C3 and a second capacitor C5, wherein one end of the crystal oscillator Y1 is simultaneously connected with one end of the first capacitor C3 and the XTAL1 end of the main control chip, the other end of the crystal oscillator Y1 is simultaneously connected with one end of the second capacitor C5 and the XTAL2 end of the main control chip, and the other end of the first capacitor C3 is connected with the other end of the second capacitor C5 and grounded.
In the embodiment of the invention, after the computer is electrified and started, the keyboard is electrified, the keyboard switch circuit initial state connecting switch K2 is in a closed state, and the keyboard can be normally used because the keyboard USB data line is in a conducting state; the keyboard is the same as the common keyboard in use mode when the computer is operated at ordinary times; when the keyboard is not used, but a computer desk is used for working, a user can press a key-press one-key locking switch 2, the output of a GPIO port P0.5 is high in level Q1 and is cut off, RL1 is disconnected, K2 is disconnected, a keyboard USB data line is disconnected, the keyboard key function is invalid, all other keys are locked, the key function is invalid, the user can work on the computer desk, and even if a file placed on the keyboard is pressed to the keyboard key, the keyboard cannot cause misoperation of a computer because the keyboard key is locked; when the user needs the keyboard to operate the computer, the user can press the key-to-key locking switch 2 again, all other keys of the keyboard are unlocked, and the user can use the keyboard normally.
Claims (5)
1. A key locking keyboard is characterized in that a key locking circuit is arranged on a data transmission line between a keyboard key circuit and a USB interface;
the key locking circuit comprises: the device comprises a main control chip, a one-key locking switch, a pull-up resistor, a first resistor, a triode, a relay, a connecting switch, a power-on reset circuit, a power circuit and a crystal oscillator circuit;
the one-key locking switch is arranged at the upper right corner of the surface of the keyboard, one end of the one-key locking switch is grounded, the other end of the one-key locking switch is simultaneously connected with one end of the pull-up resistor and the input end of the main control chip, and the other end of the pull-up resistor is connected with +5V;
one end of the first resistor is connected with the output end of the main control chip, the other end of the first resistor is connected with the base electrode of the triode, the emitting electrode of the triode is connected with +5V, the collecting electrode of the triode is connected with the input end of the relay, the output end of the relay is connected with the switch, and the connection switch is arranged on a data transmission line between the keyboard key circuit and the USB interface;
the power-on reset circuit, the power supply circuit and the crystal oscillator circuit are all connected with the main control chip.
2. The key locking keyboard of claim 1, wherein the one-key locking switch is smaller in size than other keys of the keyboard and smaller in height than other keys of the keyboard.
3. The key lock keyboard of claim 1, wherein the power-on reset circuit comprises a capacitor and a second resistor, wherein one end of the capacitor is connected with +5v, the other end of the capacitor is simultaneously connected with the RST interface of the main control chip and one end of the second resistor, and the other end of the second resistor is grounded.
4. The key lock keypad of claim 1, wherein the power circuit comprises a capacitor, one end of the capacitor is connected to +5v and VCC of the main control chip, and the other end of the capacitor is connected to GND of the main control chip and to ground.
5. The key locking keyboard of claim 1, wherein the crystal oscillator circuit comprises a crystal oscillator, a first capacitor and a second capacitor, one end of the crystal oscillator is simultaneously connected with one end of the first capacitor and the XTAL1 end of the main control chip, the other end of the crystal oscillator is simultaneously connected with one end of the second capacitor and the XTAL2 end of the main control chip, and the other end of the first capacitor is connected with the other end of the second capacitor and 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 CN106849934A (en) | 2017-06-13 |
| CN106849934B true CN106849934B (en) | 2023-04-28 |
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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 (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200910151A (en) * | 2007-08-22 | 2009-03-01 | Micro Star Int Co Ltd | A control method of computer keyboard lock, keyboard and computer device with the function of computer keyboard lock |
-
2017
- 2017-04-13 CN CN201710238460.1A patent/CN106849934B/en active Active
Patent Citations (4)
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN106849934A (en) | 2017-06-13 |
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