US 12,192,708 B2
Bone conduction acoustic transmission device
Junichi Rekimto, Kanagawa (JP)
Assigned to SONY CORPORATION, Tokyo (JP)
Appl. No. 16/641,502
Filed by SONY CORPORATION, Tokyo (JP)
PCT Filed Jun. 20, 2018, PCT No. PCT/JP2018/023399
§ 371(c)(1), (2) Date Mar. 23, 2021,
PCT Pub. No. WO2019/053990, PCT Pub. Date Mar. 21, 2019.
Claims priority of application No. 2017-175829 (JP), filed on Sep. 13, 2017.
Prior Publication US 2021/0219079 A1, Jul. 15, 2021
Int. Cl. H04R 25/00 (2006.01); H04R 1/10 (2006.01); H04R 11/02 (2006.01)
CPC H04R 25/606 (2013.01) [H04R 1/1041 (2013.01); H04R 1/1075 (2013.01); H04R 11/02 (2013.01); H04R 2460/13 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A bone conduction acoustic transmission device, comprising:
a first magnetic body placeable to be in contact with or embeddable in a head of a living body;
a coil unit separate from the first magnetic body, wherein
the coil unit includes:
a casing mountable on the first magnetic body;
a coil wound around the casing; and
a second magnetic body inside the casing, wherein the second magnetic body is configured not to vibrate due to the coil, and
the first magnetic body is configured to vibrate based on an acoustic signal applied to the coil with the coil unit mounted on the head; and
a vibration damping member that protrudes from a bottom surface of the casing, wherein
the bottom surface of the casing is on a side opposite the head,
the vibration damping member is configured to enclose sides of the first magnetic body with the coil unit is mounted on the head, and
a height at which the vibration damping member protrudes from the bottom surface is higher than a height of the first magnetic body.