公开(公告)号：US20230370782A1

公开(公告)日：2023-11-16

申请号：US18025724

申请日：2021-09-06

Applicant: RION CO., LTD.

Inventor： Takashi IWAKURA

IPC: H04R11/02

CPC classification number: H04R11/02

Abstract: This electromechanical transducer includes a pair of magnets, a pair of yokes that each comprise a plurality of yoke components superposed over each other in a flat-plate-form region and that guide magnetic fluxes generated by the magnets, a hollow-core coil to which an electric signal is supplied, an armature passed through a space inside a structural section formed by integrally arranging the magnets and the coil on the inner sides of the pair of yokes, and a pair of elastic members that each engage the structural section and the armature.

公开(公告)号：US20210029477A1

公开(公告)日：2021-01-28

申请号：US17044581

申请日：2019-04-05

Applicant: RION CO., LTD.

Inventor： Kyoji YOSHIKAWA ,  Takashi IWAKURA

IPC: H04R25/00 ,  H04R1/10 ,  H04R7/02

Abstract: An electroacoustic transducer includes an electromechanical transducer and a casing. The electromechanical transducer transduces an electric signal into mechanical vibration. The housing can be attached to a cavum conchae without blocking an external auditory canal, in which the electromechanical transducer is housed, and vibrates due to the mechanical vibration caused by the electromechanical transducer to generate sound. The housing includes an inner housing portion located on the external auditory canal side and an outer housing portion located on an external environment side when the housing is attached to the cavum conchae. The housing has an ellipsoidal shape or an oval shape.

公开(公告)号：US20210235199A1

公开(公告)日：2021-07-29

申请号：US17051135

申请日：2019-04-18

Applicant: RION CO., LTD.

Inventor： Takashi IWAKURA

IPC: H04R11/02

Abstract: The electromechanical transducer is provided with: a structure portion in which a magnet, yokes, and a coil are integrally arranged; an armature which includes an inner portion penetrating through an internal space of the structure portion along a central axis in the X-direction, and outer portions, constitutes a magnetic circuit with the structure portion, and is displaced in the Z-direction; and elastic members providing the armature with a recovery force. Each of the elastic members has a first and a second engaging portions. A width in which a force in the Z-direction acts between each of the elastic members and the structure portion via the first engaging portion has a first distance. A width between each of the elastic members and the outer portion via the second engaging portion has a second distance in the Y-direction, wherein the dimension condition of 2a>2×2b is set.

公开(公告)号：US20210067861A1

公开(公告)日：2021-03-04

申请号：US17003443

申请日：2020-08-26

Applicant: RION Co., Ltd.

Inventor： Akihiro SOETA ,  Takashi IWAKURA

IPC: H04R1/10

Abstract: An installation structure of a vibrator includes elastic members formed of an elastic material, the elastic members being arranged between a housing of a listening device, and the vibrator accommodating an electromechanical transducer for transducing an electric signal into mechanical vibration. The vibrator is installed on the listening device such that a lower surface of the vibrator is disposed at a position facing an ear cartilage in a state where the listening device is worn on an ear, and a first mechanical impedance of the elastic members between the vibrator and the housing is set smaller, at a frequency of 200 Hz to 1000 Hz, than twice a second mechanical impedance, with which the vibrator is loaded, of the ear cartilage.

公开(公告)号：US20180310101A1

公开(公告)日：2018-10-25

申请号：US15959706

申请日：2018-04-23

Applicant: RION Co., Ltd.

Inventor： Takashi IWAKURA ,  Fumitaka FUNAHASHI ,  Kei KOYAMA

IPC: H04R11/02 ,  H01F7/124 ,  H02K35/06 ,  H04R1/10

CPC classification number: H04R11/02 ,  H01F7/124 ,  H02K35/06 ,  H04R1/10 ,  H04R11/00

Abstract: An electromechanical transducer includes: a structural portion configured such that two pairs of magnets magnetized in opposite directions, a yoke configured to guide magnetic fluxes from the magnets, and a coil configured to receive a supplied electric signal are located integrally; an armature having an inner portion penetrating an internal space of the structural portion and outer portions protruding from the inner portion toward both sides in a first direction, forming, together with the structural portion, a magnetic circuit through regions of the inner portion facing the two pairs of magnets, and configured to displace in a second direction perpendicular to the first direction by magnetic force of the magnetic circuit; and a pair of elastic members each located on both sides of the armature in the second direction, and configured to provide, to the armature, restoring force according to relative displacement of the armature corresponding to the structural portion.

公开(公告)号：US20170244309A1

公开(公告)日：2017-08-24

申请号：US15439750

申请日：2017-02-22

Applicant: Rion Co., Ltd.

Inventor： Takashi IWAKURA

IPC: H02K33/02

CPC classification number: H02K33/02 ,  H04R11/02 ,  H04R25/00

Abstract: An electromechanical transducer of the invention comprises a structural unit, an armature, and the first and second elastic units. The structural unit includes magnets, a yoke and a coil. The armature includes an inner portion disposed to pass through inside the structural unit and two outer portions protruding from the inner portion in a first direction, and the armature constitutes a magnetic circuit with the structural unit via two regions through which components of the magnetic flux flow in reverse directions in the inner region. The elastic units give restoring forces to the outer portions in response to displacement of the armature due to magnetic forces of the magnetic circuit. In the armature, a cross-sectional area at a predetermined position between the two regions is smaller than that at the two regions, and magnetic flux flowing in the first direction within a range of displacement of the armature.