公开(公告)号：US20250094761A1

公开(公告)日：2025-03-20

申请号：US18891079

申请日：2024-09-20

Applicant: TDK Corporation

Inventor： Shoma KAJIKIYA ,  Toshio TOMONARI ,  Chris T. BURKET

IPC: G06K19/077

Abstract: Disclosed herein is an antenna device that includes: a metal plate having a first slit extending in a long side direction thereof and a second slit extending in a short side direction thereof; a first coil disposed so as to overlap with the metal plate in a plan view and circling along an outer edge of the metal plate; and a second coil electrically connected to the first coil, disposed so as to be surrounded by the first coil, and disposed so as to overlap with the first slit. The first slit has a first end that is open to divide the outer edge and a second end terminating without reaching the outer edge. The second slit has a third end that is open to divide the outer edge and a fourth end terminating without reaching the outer edge.

公开(公告)号：US20240326092A1

公开(公告)日：2024-10-03

申请号：US18621849

申请日：2024-03-29

Applicant: TDK Corporation

Inventor： Shigeru KANEKO ,  Chris T. BURKET

IPC: B06B1/06 ,  B06B1/02

CPC classification number: B06B1/0648 ,  B06B1/0207

Abstract: Disclosed herein is a vibration device that includes: a coil; a drive circuit generating, based on induction electromotive force of the coil, a drive signal having a predetermined frequency; a piezoelectric element supplied with the drive signal; and a metal plate having a recess. The piezoelectric element is accommodated in the recess of the metal plate and stuck to a bottom surface of the recess through an adhesive.