1. An input device for transmitting information comprising: a manipulation portion configured to be displaced by deformation by the user; a sensor for detecting a displacement amount of the manipulation portion; a vibration element for generating vibrations that are transmitted to the user; and a controller configured to control the vibration element to generate vibrations in accordance with information indicative of the displacement amount of the manipulation portion detected by the sensor, when v 1 â‰¦xâ‰¦T 1 is satisfied, where x represents the displacement amount, T 1 represents a first threshold, and v 1 is a predetermined value less than T 1 , the controller controls the vibration element to generate vibrations such that the vibrations become stronger as the displacement amount increases and when the displacement amount x has reached T 1 , from a value smaller than T 1 , the controller generates a forward crossing signal which indicates that the displacement amount x has reached T 1 from a value smaller than T 1 for inputting the forward crossing signal to a predetermined apparatus, or when the displacement amount x has returned to T 1 from a value larger than T 1 , the controller generates a reverse crossing signal which indicates that the displacement amount x has returned to T 1 from a value larger than T 1 for inputting the reverse crossing signal to the predetermined apparatus.