公开(公告)号：US20230353944A1

公开(公告)日：2023-11-02

申请号：US18136962

申请日：2023-04-20

Applicant: EM-TECH Co., Ltd.

Inventor： Gang Tae Kim ,  Heung Woo Jeong ,  Hyun Woo Jeong ,  Hyeon Sik You

IPC: H04R9/02 ,  H04R5/04 ,  H04R1/02 ,  H04R13/00 ,  H04R7/12

CPC classification number: H04R9/025 ,  H04R5/04 ,  H04R1/021 ,  H04R13/00 ,  H04R7/127

Abstract: A waterproof microspeaker includes: a frame; a magnetic circuit provided below the frame and including a yoke, inner and outer magnets, and a top plate; a voice coil located between the magnets and configured to vibrate by a magnetic field of the magnetic circuit and mutual electromagnetic force when an electric signal is applied; and a diaphragm housing provided above the frame. The diaphragm housing includes: a sidewall portion provided above the frame and having a predetermined height; an edge dome portion protruding upwardly or downwardly along an inner circumference of the sidewall portion; and a diaphragm provided inside the edge dome, allowing an upper end of the voice coil to be fixed thereto, and configured to generate sound by vibration of the voice coil. The diaphragm includes a polymeric material including metal or plastic and is inserted into an inner circumferential portion of the edge dome portion.

公开(公告)号：US20220182763A1

公开(公告)日：2022-06-09

申请号：US17540295

申请日：2021-12-02

Applicant: EM-TECH Co., Ltd.

Inventor： Ki Hyun Nam ,  Dong Woo Seok ,  Gang Tae Kim ,  Hyun Woo Jeong ,  Jung Soo Lee

IPC: H04R7/04 ,  H04R31/00 ,  H04R9/06

Abstract: A high water pressure microspeaker is provided. A diaphragm of the waterproof microspeaker includes a side wall portion having a predetermined height and forming an outer portion, a center portion positioned on an inner side of a dome portion, and a silicone injection-molded portion including a dome portion protruding upward or downward along an inner circumference of the side wall portion and a waterproofing portion protruding upward or outward from the side wall portion, wherein the side wall portion and the center portion are formed of plastic, and the center portion and the side wall portion are integrally manufactured with the silicon injection-mold portion by double-shot injection-molding.