Input device and control method of input device

An input device comprising:

• a key that outputs a signal according to at least two pressing amounts;
• a pressing amount detection unit that detects a pressing amount of the key;
• an A/D conversion unit that converts the pressing amount of the key into digital data;
• a memory unit that stores the digital data;
• and
• a main control unit that determines whether the key has been pressed or whether the key has not been pressed, based on the pressing amount of the key, and outputs information, wherein
• the main control unit includes:
• a pressing determination unit that,
• when outputting information indicating that the key has not been pressed, and then when a detected value of the pressing amount is equal to or larger than an ON-threshold value, which is larger than a local minimum value of the pressing amount by a predetermined ON-hysteresis, changes the information to information indicating that the key has been pressed, and outputs the information, and when outputting information indicating that the key has been pressed, and then when the detected value of the pressing amount is less than an OFF-threshold value, which is smaller than a local maximum value of the pressing amount by a predetermined OFF-hysteresis, changes the information to information indicating that the key has not been pressed, and outputs the information,
• an initial operation OFF value, and an initial operation ON value that is larger than the initial operation OFF value, are set as initial operation values,
• when the pressing amount detected by the pressing amount detection unit is less than the initial operation ON value, the pressing determination unit outputs information indicating that the key has not been pressed, regardless of whether the pressing amount is equal to or larger than the ON-threshold value, and
• when the pressing amount detected by the pressing amount detection unit, which had been equal to or larger than the initial operation OFF value, decreases to be less than the initial operation OFF value, the pressing determination unit outputs information indicating that the key has not been pressed, regardless of whether the pressing amount is less than the OFF-threshold value.