Electronic device that vibrates an element for sound transmission

摘要

Provided is an electronic device that is capable of reducing sound leakage from a vibration plate vibrated by a piezoelectric element. An electronic device 1 of the present invention includes: a piezoelectric element 30; and a vibration plate 10 configured to be vibrated by the piezoelectric element 30. Vibration sound is transmitted by the vibration plate vibrating a part of a human body. The piezoelectric element 30 is vibrated using a processed sound signal in which at least a part of frequency components of a sound reproduction signal that are higher than a predetermined threshold value is cut or attenuated.

主权项

1. An electronic device configured for positioning in contact against a portion of a human body comprising:
a housing including an interior and an exterior; a piezoelectric element positioned in the interior of the housing; and a vibration plate including a back surface facing the interior of the housing and a front surface positioned to face the portion of the human body, the vibration plate configured to be vibrated by the piezoelectric element and to be joined to the housing such that vibration of the vibration plate by the piezoelectric element is higher in an upper portion thereof including a joining portion with the piezoelectric element than in a lower portion thereof, wherein sound is transmitted by bending the vibration plate with the piezoelectric element such that a portion of the vibration plate directly above the piezoelectric element protrudes to a greater extent than all neighboring portions of the vibration plate adjacent to a long side of the piezoelectric element and by vibrating a contacting part of a human body that is in contact with the bent vibration plate, the protruding portion of the vibration plate located directly above the piezoelectric element and including a portion of the front surface positioned in nonoverlapping relationship with the housing in a direction normal to the front surface extending towards the exterior to expose the nonoverlapping portion of the front surface to the exterior, wherein the piezoelectric element is vibrated using a signal in which at least a part of frequency components that are higher than a predetermined threshold value is cut or attenuated, and wherein the piezoelectric element is directly attached to the back surface of the vibration plate via a joining member.