TH4636A - Miniature motor - Google Patents

Abstract

Miniature motor with cylindrical housing A field-mounted plastic or rubber magnet that is tightly sealed against the inner surface of the housing, a shaft supported to be rotated by a slip-on on the housing. And a rotor that was prepared inside of a cylindrical rubber magnet Where the outer diameter of the miniature motor is made to be smaller than 15 mm and the thickness to outer diameter ratio of the rubber magnet is set in the range 0.085 to 0.125.

Claims (1)

1.Miniature motors consist of a cylindrical motor housing (2), a cylindrical rubber or plastic magnet (1), which form the field and are rigidly assembled into the inside of the motor housing (2) as follows: And a rotor (3) which has a shaft (4) that is supported rotatable with a bearing provided on the aforementioned motor housing (2) and is provided rotatable on the inner circumference surface. Through a small gap, the rotor (3) is rotated when electric current is fed to the set of coils wound on the rotor (3) and is characterized by Specifically, the motor housing (2) outer diameter is shortened by 15mm. (1) It is produced by winding a rectangular sheet of rubber magnetic material consisting of strontium. Ferrite or plastic magnetic material Which contains strontium The ferrite is given a cylindrical shape and the ratio (t / D) of the thickness (t) of such a cylindrical magnet (1) to the outer diameter (D) of such magnet (1) is set. Where values within the range which exceed 0.085 and not exceed 0.125