Acoustic device

• US 10,448,167 B2
• Filed: 12/28/2018
• Issued: 10/15/2019
• Est. Priority Date: 01/27/2018
• Status: Active Grant

• Current Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Original Assignee: AAC Technologies Pte Limited (AAC Technologies Holdings Inc.)
• Inventors: Xiao, Bo, Linghu, Ronglin
• Primary Examiner(s): Kim, Paul
• Application Number:
  US16/234,759
• Publication Number:
  US 20190238988A1
• Time in Patent Office: 291 Days
• Field of Search: 381117
• CPC Class Codes: H04R 1/06 Arranging circuit leads; Relieving strain on circuit leads
• CPC Class Codes: H04R 2400/11 Aspects regarding the frame of loudspeaker transducers
• CPC Class Codes: H04R 3/00 Circuits for transducers , loudspeakers or microphones
• CPC Class Codes: H04R 7/18 at the periphery
• CPC Class Codes: H04R 7/20 Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
• CPC Class Codes: H04R 9/025 Magnetic circuit
• CPC Class Codes: H04R 9/046 Construction
• CPC Class Codes: H04R 9/06 Loudspeakers

Abstract

The present disclosure provides an acoustic device, including a frame and a vibration system fixed to the frame, where the vibration system includes a first vibrating diaphragm fixed to the frame, a voice coil driving the first vibrating diaphragm to vibrate and produce a sound, and a flexible circuit board, the flexible circuit board is fixed to an end of the voice coil which is away from the first vibrating diaphragm, the flexible circuit board includes a first fixing arm and a second fixing arm respectively fixed to the frame and the voice coil body, an elastic arm connecting the first fixing arm and the second fixing arm, and a pad respectively extending from two ends of the second fixing arm, the pad is at least partially located on an inner side of the voice coil body. The acoustic device in the present disclosure has better acoustic performance.

Claims

1. An acoustic device, comprising a frame and a vibration system fixed to the frame, wherein the vibration system comprises a first vibrating diaphragm fixed to the frame, a voice coil driving the first vibrating diaphragm to vibrate and produce a sound, and a flexible circuit board, the flexible circuit board is fixed to an end of the voice coil which is away from the first vibrating diaphragm, the voice coil comprises a voice coil body and a voice coil lead wire extending from the voice coil body and electrically connected to the flexible circuit board, the flexible circuit board comprises a first fixing arm and a second fixing arm respectively fixed to the frame and the voice coil body, an elastic arm connecting the first fixing arm and the second fixing arm, and a pad respectively extending from two ends of the second fixing arm, the pad is at least partially located on an inner side of the voice coil body, and the voice coil lead wire extends from the voice coil body toward the inner side of the voice coil body and is fixed to the pad to form an electrical connection;

wherein the vibration system further comprises a second vibrating diaphragm fixed to the flexible circuit board, the second vibrating diaphragm comprises a vibration portion and a first fixing portion and a second fixing portion respectively extending from two opposite sides of the vibration portion, the first fixing portion is fixed to the first fixing arm, and the second fixing portion is fixed to the second fixing arm;

wherein the frame is rectangular, there are two flexible circuit boards, and the two flexible circuit boards are respectively located on two shorter opposite sides of the frame; and

wherein there are two second vibrating diaphragms, and the two second vibrating diaphragms are respectively fixed to the two flexible circuit boards and are symmetrically disposed about the voice coil body.

2. The acoustic device according to claim 1, wherein the vibration portion is of an arc structure protruding toward the first vibrating diaphragm.

3. The acoustic device according to claim 1, wherein the voice coil lead wire is fixed to the pad through welding.