A keyboard case is a leather case that contains a USB keyboard or Bluetooth keyboard, which can connect and protect mobile phones, MIDs, tablets, etc. After plugging it into the USB port of the relevant device (or connecting it via Bluetooth), you can use the external keyboard to type.

With the popularity of the iPhone, a series of keyboardless phones, MIDs, and tablets have become increasingly popular. To address the speed gap between full-touch and keyboard-based input modes, or to alleviate the discomfort some users experience with keyboard-less devices, a new type of leather case for phones, MIDs, and tablets has emerged. These cases are more than just a case; they also contain a USB keyboard. Plug them into the USB port on your phone, MID, or tablet, allowing you to type using an external keyboard.

Maintenance methods

The most commonly used type of keyboard is the leather keyboard, which has the advantages of long service life, moisture resistance, dust resistance, and oil resistance. Although it can cope with relatively harsh environments, it does not mean that we do not need to pay attention to the protection of the leather keyboard. If you do not pay attention to maintenance, even the best quality membrane keyboard will not last long.

Over time, leather keyboards can experience issues like a stiff feel and hard keys. This is because friction between the keycaps (the "crater") and the slide rails increases, causing the keys to stick. Many people choose to replace their keyboards when faced with these issues. However, this problem can be solved. Use a thin stick like a toothpick to apply a suitable amount of lubricant to the keycaps' "feet" and the slide rails. This can alleviate the stiffness to a certain extent.