Keyboard pictures, large pictures and high-definition pictures
Computer keyboard diagram:
Computer keyboard key design concept:
Keys of a keyboard The key design includes two concepts, one is the design of the main English and numeric keys, and the other is the design of various auxiliary keys.
The most common English and numeric keypad design is the commonly known as "QWERTY" Corty keyboard. This is the key scheme invented by Christopher Latham Sholes in 1868.
The appearance of the keyboard is divided into standard keyboard and ergonomic keyboard. The ergonomic keyboard separates the left-hand key area and the right-hand key area specified by the fingering on the standard keyboard to form a certain The angle prevents the operator from consciously clamping his arms and maintains a more natural shape.
The keyboard of this design is named the natural keyboard by Microsoft. For users who are accustomed to touch typing, it can effectively reduce the rate of mistyping the left and right hand keypads, such as the letters "G" and "H".
Some ergonomic keyboards also intentionally enlarge the area of ??commonly used keys such as the space bar and the enter key, and add a hand guard support plate at the lower part of the keyboard to provide a support point for the previously suspended wrists and reduce the risk of wrist fatigue. Fatigue caused by long-term suspension. These can be regarded as humanized designs.
According to the working principle, it can be divided into mechanical keyboard, membrane keyboard, capacitive keyboard, conductive rubber keyboard,
Things to note when purchasing computer keyboards:
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1. The tactile feel of the keyboard
As the most commonly used input device in daily life, the tactile feel is undoubtedly the most important. The feel is mainly determined by the strength of the keys and the degree of resistance.
To judge the feel of a keyboard, we will test whether the key elasticity is moderate, whether the key stress is uniform, whether the keycaps are loose or wobbly, and whether the key travel is appropriate.
Although different users have different requirements for the elasticity and key travel of the keys, a high-quality keyboard should be able to meet the usage habits of the vast majority of users in these aspects, and the force of the keys Evenness and firmness of the keycaps must be ensured, otherwise it may cause key jams or make the user feel fatigued.
2. The appearance of the keyboard
The appearance includes the color and shape of the keyboard. A beautiful and fashionable keyboard will add a lot of color to your desktop, while a traditional keyboard will Make your job more boring. Therefore, as for the keyboard, as long as you think it is beautiful, you like it and it is practical.
3. The workmanship of the keyboard
The cost of the keyboard is low, but it does not mean that it can be handled carelessly. The surface and edges of a good keyboard are exquisitely processed. The letters and symbols on the keycaps are usually laser-engraved, giving them a bumpy feel to the touch.
When purchasing, carefully check whether the writing on the keys is engraved, not directly printed with ink, because the writing on this keyboard will fall off after a short time of use.
The corners of the keyboard should not be sharp. A conventional keyboard has three indicator lights: CapsLock, NumLock, and ScrollLock.
4. Keyboard key layout
Although there are standards for keyboard key distribution, each manufacturer still has room for maneuver on this standard.
First-class manufacturers can use their experience to arrange the keyboard keys more considerately for users, while small manufacturers can only use the most basic standards, and even make products with extremely poor key distribution because of substandard quality. keyboard.
5. Keyboard noise
I believe that all users hate the noise generated by typing on the keyboard, especially those who are still working, gaming, and surfing the Internet late at night. Therefore, A good keyboard must ensure that it only produces a small noise when typing at high speed and does not affect others' rest.
6. The problem of keyboard key conflict
In daily life, we play some games more or less. When playing games, certain key combinations will appear consecutively. used, then this requires that these keyboards have these gaming keys that do not conflict.
7. The length, width and height of the keyboard.
When we buy a keyboard, measure the length, width, and height of the computer desk where the computer keyboard will be placed before purchasing.
Computer keyboard tips:
1. F1-F12
F1: Help information.
F2: Select a file or folder.
Press F2 to rename.
F3: Press F3 on the desktop, and the "Search for Files" window will appear.
F4: Open IE's address bar list.
F5: Refresh or the contents of the current window in the explorer.
F6: Quickly locate the address bar in Explorer and IE.
F8: Can be used to display the startup menu when starting the computer.
F9: Can be used to reduce the volume in Windows Media Player.
F10: Activate menus in Windows or programs or increase the volume.
F11: You can make the current resource manager or IE display in full screen.
F12: In a Word document, the window to save as a file can quickly pop up.
2. Clicking the Windows window key is the "Start" menu, and the "Windows D" key combination can quickly switch desktops.
3. In the small keyboard area, NumLock is the switch between the small keyboard numbers and the direction keys. When the NumLock indicator light is on, the keypad is input in the form of numbers. When the NumLock indicator light is turned off, the direction is displayed
Extended information:
The origin of the computer keyboard letter arrangement:
In the 1870s, Shores Company was The largest manufacturer specializing in typewriters at the time. Due to the imperfect mechanical technology at that time, the rebound speed of the keys after being hit was slow.
Once a typist types too fast, it is easy for two keys to get twisted together and they must be separated carefully by hand, thus seriously affecting the typing speed. For this reason, the company often receives complaints from customers.
In order to solve this problem, designers and engineers worked hard. Later, a smart engineer suggested that the reason why the typewriter keys were twisted was that the keys bounced back slowly, and the typist was too fast. Since we can't increase the rebound speed, why don't we think of ways to reduce the typing speed?
This is undoubtedly a new idea. There are many ways to slow down a typist. The simplest is to shuffle the order of the 26 letters and place the more commonly used letters under clumsy fingers.
For example, the letters "O", "S", and "A" are frequently used, but they are struck with the clumsiest ring finger of the right hand, ring finger of the left hand, and little finger of the left hand. The less frequently used letters such as "V", "J" and "U" are handled by the most flexible index finger.
As a result, this "QWERTY" combination keyboard was born and gradually took shape. Later, due to the development of materials and technology, the rebound speed of the keys was much faster than the typist's keystroke speed, but the alphabetical order of the keyboard could not be changed.
Many more reasonable alphabetical order design solutions have appeared so far, but none of them can be promoted. This shows how powerful the power of social habits is.
In addition, keyboard also refers to keyboard instruments, such as electronic keyboards, pianos, etc. When a band performs live, many sound effects need to be simulated by an electronic keyboard or electronic piano. The player responsible for this type of instrument is called a "keyboard player."
Today, the most commonly used input devices for personal computers are the keyboard and mouse.
The universal 101-key or 102-key keyboard is named according to the arrangement of English letters and is called a QWERTY keyboard. There is no doubt that it was "born out" of the English typewriter.
Bill Gates once used this keyboard to illustrate what a "de facto" standard is: "The order of letters on English typewriters and computer keyboards is QWERTY, and there is no law saying that they must be arranged this way.
But they work, and most users stick to them.
"What's interesting is that this arrangement is not a reasonable layout.
The inventor of the QWERTY keyboard is Christopher Shores, who lived during the American Civil War in the 19th century and was the "Milwaukee News" 》Editor. With the help of his friend Saul, Shores developed a page numbering machine and obtained a patent for the invention.
Glidden, a newspaper colleague, suggested that he further develop a typewriter on this basis and gave him the invention. The British experimental data were obtained.
After spending several years on Shores and two partners, they made the prototype of the typewriter in 1860.
However, Shores and his two partners worked hard for several years. Sholes was frustrated to find that his machine could not work properly as long as his typing speed was slightly faster. As a rule, Sholes arranged the 26 English letters on the keyboard in the order of ABCDEF. Not too far apart. In this case, as long as the finger movement is slightly faster, the metal rods connecting the keys will interfere with each other.
To overcome the interference phenomenon, Shores rearranged the letter keys. position, arrange the commonly used letters as far apart as possible, and extend the process of finger movement.
The abnormal thinking method actually succeeded. Shores typed a line of letters excitedly: "The first blessing. Dedicated to all men, and especially, to all women. ”
Sholes “especially” dedicated his invention to women. He wanted to create an unprecedented new profession for them—“typists.” June 23, 1868 , the U.S. Patent Office officially accepted the typewriter invention patent jointly registered by Shores, Glidden and Saul.
From this point of view, the keyboard letter arrangement invented by Shores has too many shortcomings. For example, 8 of the 10 most commonly used letters in English are too far away from the prescribed finger position, which is not conducive to improving typing speed; in addition, there are too many letters on the keyboard that need to be typed with the left hand, because most people are "." "right-handed", so it is very awkward to use.
Someone has made statistics that using a QWERTY keyboard, a skilled typist's fingers can move up to 25.7 kilometers in 8 hours. However, QWERTY The keyboard is still the "de facto" standard for computer keyboards today.
Although August Dovrak, a professor at the University of Washington, designed the DVORAK keyboard with a more scientific key arrangement in 1932, it never became popular. .
Windows has built-in support for it. Open "Control Panel → Keyboard", enter the "Input Method Regional Settings" tab, and then click the "Add" button to change the "Input Method Regional Settings" "Set to "English" and find "American English-DVORAK" in the "Keyboard Layout/Input Method" column.
After confirmation, the key positions have changed. You have the capital to improve your English Typing speed has improved. Of course, it still takes time to adapt to the new system and practice patience before success.
Reference: Baidu Encyclopedia-Computer Keyboard
Reference: Baidu Encyclopedia- Keyboard
Keyboard 108 key position comparison chart
101 keyboard:
104 keyboard:
107 keyboard:
108 Keyboard:
The keyboard is a command and data input device used to operate equipment. It also refers to a set of function keys that operate a machine or equipment through system arrangements. The keyboard also constitutes a keyboard instrument. Part of it can also refer to a musical instrument that uses a keyboard, such as a piano, a digital piano or an electronic keyboard. The keyboard is helpful for practicing typing.
The keyboard is the most commonly used and important input device, through which English letters can be written. , numbers, punctuation marks, etc. are input into the computer to issue commands to the computer, enter data, etc. At first, this type of keyboard was mostly used on brand machines. Brand machines such as HP and Lenovo were the first to adopt this type of keyboard, which was widely praised. It was once regarded as a feature of brand-name machines. As time goes by, independent products with various shortcut functions are gradually appearing on the market, sold separately, and equipped with dedicated drivers and setting software. They are also available on compatible machines. Able to achieve personalized operations