Double coil magnetic levitation vibrator and electric toothbrush

Abstract

The invention provides a double-coil magnetic levitation vibrator and an electric toothbrush. The vibrator comprises a shell; a rotating shaft is installed in the shell; the first end of the rotating shaft extends out from the shell; the rotating shaft is sleeved with a rotor; the inner surface of the circumferential wall of the shell is provided with magnets which are distributed at intervals along the circumferential direction of the shell; the magnets are opposite to the rotor and are located at the outer side of the rotor; the exterior of the shell is provided with an eccentric wheel; the eccentric wheel sleeves the second end of the rotating shaft; the shell is an integrally-formed shell; in the axial direction of the shell, two sides of the rotor are respectively provided with a first coil and a second coil; the first coil and the second coil respectively sleeve the rotating shaft; and the first coil and the second coil are installed in the shell. The electric toothbrush is provided with an outer shell and a toothbrush head; the vibrator mentioned above is installed in the shell; the rotating shaft of the vibrator shaft drives the toothbrush head to move. The vibrator provided by the invention has the advantages of low production cost, simple assembling process and excellent concentricity.

Description

Technical field [0001] The invention relates to the field of motors, in particular to a double-coil magnetic levitation vibrator and an electric toothbrush with the vibrator. Background technique [0002] Electric toothbrushes are common daily necessities. The existing electric toothbrushes have a toothbrush head with bristles, and a vibrator is arranged in the shell of the electric toothbrush. The vibrator is connected to the toothbrush head. After the vibrator is activated, its rotating shaft Drive the toothbrush head to rotate, thereby driving the bristles to rotate within a certain range. [0003] See figure 1 versus figure 2 , The existing vibrator has a housing, which is composed of an upper housing 10 and a lower housing 11. A rotating shaft 12 is provided in the housing, and the first end 13 of the rotating shaft 12 extends outside the housing and can be inserted into the toothbrush head Inside. A coil is provided in the shell, so a skeleton 15 is mounted on the rotating...

AI Technical Summary

Problems solved by technology

[0005] However, because the shell of the existing vibrator is formed by the upper shell 10 and the lower shell 11 being fastened together, since the upper shell 10 and the lower shell 11 are stamped parts and there are tolerances, these stamped parts are mutually The fastening cannot ensure the coaxiality of the two sets of magnets. After the coils are energized, the rotation angles of the two rotors 16 and 17 are not necessarily the same under the action of the two sets of magnets, which affects the rotation of the rotating shaft 12.

Moreover, since only one group of coils is arranged in the vibrator, the magnetic fields generated by the two groups of rotors 16, 17 are insufficient, which affects the rotational strength of the rotating shaft 12.

In addition, since two groups of magnets are arranged in the vibrator, the production cost of the magnets is high, and the process of fixing the magnets in the upper housing 10 and the lower housing 11 is complicated, resulting in high production costs of the vibrator, which in turn leads to failure of the electric toothbrush. Production costs are too high

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