Abstract: A storing case for holding a recording medium is provided where the recording medium can be easily stored and removed. The storing case has a sturdy structure that is durable and in which the stored recording medium is securely retained. The storing case comprises an outer case and an inner case, which are assembled to provide a storage cavity. First engaging portions and a second engaging portion are formed in upper and lower parts of inner side surfaces of a right wall and a left wall of the outer case. Third engaging portions and fourth engaging portions are engaged in the first engaging portions and the second engaging portions and are formed in the upper and lower parts of outer side surfaces of a right wall and a left wall of the inner case. Engaging pawls for engaging recessed portions of the recording medium are provided in the right wall and the left wall.

Abstract: A tricycle with an electric motor in which two rear wheels 4 and 4 are driven by not only an electric motor 5, but also pedals 6 with manpower. A rotational force of the pedals 6 is transmitted to drive shaft 9 via first bevel gears 8a and 8b and then transmitted to a one-way clutch 7 via second bevel gears 10a and 10b from the drive shaft 9. The output of the one-way clutch 7 is then transmitted to the two rear wheels 4 and 4. The electric current to the electric motor is a pulse current and its pulse width is controlled to be shorted in relation to a braking operation.