Thin stator, axialclearance brushless vibrating motor with the stator

Abstract

The invention provides a thin stator and an axial-gap type brushless oscillating motor with the thin stator, which can be fully left out thickness to arrange a braking torque generating component, remove a part of a winding configuration region of a stator base, and determine the thickness of a winding so as to achieve the aim of increasing a torque. A plurality of coreless armature windings (5) are configured on a support (1) of a non-magnetic or weak-magnetic substance which configures a shaft supporting part (1a) in the center via an insulating protection film. The stator base (4) is configured without overlapping the coreless armature windings (5). A drive circuit component (D) is configured on the stator base (4). The braking torque generating component (3) is embedded in the support (1). The braking torque generating component (3) is provided with a plurality of braking torque generating part (3a) forming a magnetic pole field angle of a magnet of a combined rotor.

Description

field of invention [0001] The present invention relates to a thin stator suitable for a silent notification unit of a mobile communication device, and an axial gap type brushless vibration motor provided with the stator. Background technique [0002] As an axial gap type brushless vibration motor, a centerless slotless motor having a single shaft has been proposed (see Patent Document 1 and Patent Document 2). [0003] In addition, as a brushless vibration motor with a drive circuit, we know a heart-shaped non-circular motor in which the armature winding is wound on a plurality of salient poles arranged in equal parts, and the drive circuit part is arranged on the stator side. (Refer to Patent Document 3). [0004] However, the above-mentioned motor has a large lateral dimension, poor mounting efficiency of the SMD method arranged on a printed circuit board, and is a heart-shaped motor, so the thickness has to be large, which is not practical. [0005] In addition, there a...

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Problems solved by technology

[0013] However, in order to reliably start even if either the center of the magnetic pole of the magnet or the neutral region of the magnetic pole stops at the position of the braking torque generating part, it is necessary to deliberately deviate the braking torque generating part from the center of the winding , so when placing the braking torque generating part to the inner diameter part of the hollow armature winding, if the inner diameter of the winding is small, there is a problem that the deflection angle cannot be increased

Also, if the braking torque generating part does not deviate from the center of the winding at a predetermined angle, there is a problem that the position of the effective conductor part that contributes to the torque is sacrificed, resulting in a reduction in the starting torque

[0014] On the other hand, if the inner diameter of the winding is increased in order to deviate the braking torque generating part from the center of the winding at a prescribed angle, the outer diameter of the winding is limited in size, which in turn cannot increase the number of turns of the winding, which also leads to a start-up The problem of reduced torque

[0015]In addition, the stator of the axial gap type brushless motor generally arranges the hollow armature winding on the printed circuit board, but if it is to achieve thinning, it cannot Neglecting the thickness of the stator base, there is the problem of sacrificing the thickness of the air armature winding and still resulting in a reduction in torque

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