CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. patent application Ser. No. 15/822,359, filed Nov. 27, 2017 and Ser. No. 16/898,749 filed on Jun. 11, 2020, and Japanese Patent Application No. 2016-230688, filed Nov. 28, 2016, which are all hereby incorporated by reference in their entirety.

BACKGROUND

Technical Field

The present disclosure relates to a vibration generating device and an electronic device, and more particularly, to a vibration generating device and an electronic device for generating a vibration by using magnetism.

Background

As a vibration generating device to be mounted on an electronic device or the like, a vibration generating device for generating a vibration by using magnetism is known.

Japanese Patent Laid-Open No. H05-176498 described below discloses a vibration generating device having a structure arranging a flat magnetic body plate. The flat magnetic body plate faces a core. The core is wound with a coil arranged at the center of a flat disc-like magnetic body. In this vibration generating device, the magnetic body plate is supported by an elastic body thin plate having a structure. In the structure a central part attaching to the magnetic body plate coupled to an outer peripheral circular ring arranged at the outer periphery of the central part, with a coupling part.

Incidentally, a vibration generating device used for an electronic device or the like is required to be able to generate a required vibration force and to be thinned or downsized.

The present disclosure is related to providing a vibration generating device and an electronic device being able to be thinned or downsized.

SUMMARY

In accordance with one aspect of the present disclosure, a vibration generating device includes a protruding part; a base formed with a magnetic body; an annular coil surrounding the protruding part; a plate facing the base and formed with a magnetic body; and an elastic member supporting the plate with respect to the base. The protruding part is provided at the base. The plate and the base form a magnetic circuit.

Preferably, a flange part facing the plate is provided in a region of the base outside of an outer peripheral part of the coil.

Preferably, the flange part is a magnetic pole part.

Preferably, an outer peripheral end part of the plate is bent toward the coil, and the outer peripheral end part of the plate is arranged inside an outer peripheral end part of the base.

Preferably, in the protruding part, a recessed part is provided at a surface facing the plate, and the elastic member is arranged at the recessed part.

Preferably, in the plate, a weight is provided at a surface facing the base.

Preferably, the elastic member includes a magnetic material, and the elastic member is a member forming the magnetic circuit.

In accordance with another aspect of the present disclosure, an electronic device includes: a housing; a contact member attached to the housing; and any one of vibration generating devices described above. The vibration generating device is coupled or fixed to the housing or the contact member directly or through other member.

In accordance with the above-mentioned aspects of the present disclosure, it is possible to provide a vibration generating device and an electronic device being able to be thinned or downsized.

