US-12627930-B2 - Sound generator and audio device

US12627930B2US 12627930 B2US12627930 B2US 12627930B2US-12627930-B2

Abstract

Disclosed are a sound generator and an audio device. The sound generator includes a magnetically conductive plate, a first magnetic structure, a second magnetic structure, a treble diaphragm, a treble voice coil, a bass diaphragm and a bass voice coil. The first magnetic structure includes a first washer including a first sub-washer located and a second sub-washer provided surrounding the first sub-washer, and a treble magnetic gap is formed between the first sub-washer and the second sub-washer. A bass magnetic gap is formed between the first magnetic structure and the second magnetic structure. The treble voice coil is provided on a side of the treble diaphragm close to the magnetically conductive plate and is provided corresponding to the treble magnetic gap. The bass voice coil is provided on a side of the bass diaphragm close to the magnetically conductive plate and is provided corresponding to the bass magnetic gap.

Inventors

Miaomiao Wang
Xiaodong GUO
Chengfei Zhang
Chunfa Liu

Assignees

GOERTEK INC.

Dates

Publication Date: 20260512
Application Date: 20231229
Priority Date: 20220429

Claims (8)

1 . A sound generator, comprising: a magnetically conductive plate; a first magnetic structure comprising a first magnet and a first washer connected to the first magnet, wherein the first magnet is provided on the magnetically conductive plate, the first washer is fixedly connected to a side of the first magnet away from the magnetically conductive plate, the first washer comprises a first sub-washer provided in a middle area and a second sub-washer provided surrounding the first sub-washer, and a treble magnetic gap is formed between the first sub-washer and the second sub-washer; a second magnetic structure provided on the magnetically conductive plate and provided surrounding the first magnetic structure, wherein a bass magnetic gap is formed between the first magnetic structure and the second magnetic structure; a treble diaphragm and a treble voice coil, wherein the treble voice coil is provided on a side of the treble diaphragm close to the magnetically conductive plate and is provided corresponding to the treble magnetic gap; a bass diaphragm and a bass voice coil, wherein the bass voice coil is provided on a side of the bass diaphragm close to the magnetically conductive plate and is provided corresponding to the bass magnetic gap; a sound outlet provided at a position of the sound generator facing the treble diaphragm and configured to radiate sound waves of the treble diaphragm, wherein the sound outlet is provided corresponding to a center area of the bass diaphragm, the bass diaphragm is provided with an avoidance hole to avoid the sound outlet, and the bass diaphragm is provided on a side of the treble diaphragm away from the magnetically conductive plate; a cover provided on a side of the treble diaphragm away from the magnetically conductive plate and covering the second sub-washer, wherein the cover is provided with the sound outlet, the avoidance hole is provided corresponding to the sound outlet, and an inner periphery of the bass diaphragm corresponding to the avoidance hole is fixedly connected to the cover; and an auxiliary magnet fixedly provided on the cover, wherein the auxiliary magnet is provided with a communication hole at a position facing the sound outlet.
2 . The sound generator of claim 1 , wherein the first magnet is configured as an integral structure, a first magnetic zone is formed in a middle position of the first magnet, a second magnetic zone is formed surrounding the first magnetic zone, and a non-magnetic zone is formed between the first magnetic zone and the second magnetic zone; a magnetizing direction of the first magnetic zone is opposite to a magnetizing direction of the second magnetic zone, the first sub-washer is provided corresponding to the first magnetic zone, and the second sub-washer is provided corresponding to the second magnetic zone; and the magnetizing direction of the first magnetic zone is the same as a magnetizing direction of a magnet of the second magnetic structure.
3 . The sound generator of claim 2 , wherein the treble voice coil is provided corresponding to the non-magnetic area, and a ring width of the non-magnetic area is smaller than a ring width of the treble voice coil; and/or a diameter of the first magnetic zone is less than or equal to a ring width of the second magnetic zone.
4 . The sound generator of claim 1 , wherein the first magnet comprises a first sub-magnet and a second sub-magnet, the first sub-magnet and the second sub-magnet are separately provided, the second sub-magnet is provided surrounding the first sub-magnet, and a magnetizing direction of the first sub-magnet is opposite to a magnetizing direction of the second sub-magnet; the first sub-washer is fixedly connected to the first sub-magnet, and the second sub-washer is fixedly connected to the second sub-magnet; and the magnetizing direction of the first sub-magnet is the same as a magnetizing direction of a magnet of the second magnetic structure.
5 . The sound generator of claim 4 , wherein a gap between the first sub-magnet and the second sub-magnet is smaller than a gap between the first sub-washer and the second sub-washer; and/or a diameter of the first sub-magnet is less than or equal to a ring width of the second sub-magnet.
6 . The sound generator of claim 1 , wherein a side of the second sub-washer away from the magnetically conductive plate is provided with a mounting ring protrusion, and an outer periphery of the treble diaphragm is fixedly connected to the mounting ring protrusion; and/or the second magnetic structure comprises a second magnet and a second washer, the second magnet is fixedly connected to the magnetically conductive plate, and the second washer is fixedly connected to a side of the second magnet away from the magnetically conductive plate.
7 . An audio device, comprising the sound generator of claim 1 .
8 . The audio device of claim 7 , wherein the audio device is an earphone.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation application of International Application No. PCT/CN2023/080542, filed on Mar. 9, 2023, which claims priority to Chinese Patent Application No. 202210484369.9, filed on Apr. 29, 2022. The disclosures of the above-mentioned applications are incorporated herein by reference in their entireties. TECHNICAL FIELD The present application relates to the technical field of electroacoustic conversion, and in particular, to a sound generator and an audio device. BACKGROUND The sound generator is an important acoustic component in an audio device. It is a transducer device that converts electrical signals into acoustic signals. The audio device includes headphones, speakers, mobile phones, computers and others. Nowadays, full-band sound quality is increasingly pursued in the market. In order to meet the full-band sound quality, many multi-unit audio devices that combine treble and bass units have emerged, that is to say, one audio device is provided with a treble unit and a bass unit. However, although the existing multi-unit audio device solves the problem of full frequency bands, it also leads to an increase in the size of the sound generator and increases the difficulty of assembling the entire audio device. SUMMARY The main purpose of the present application is to provides a sound generator, which aims to achieve miniaturization of sound generators, thereby facilitating to assembly of audio device. In order to achieve the above purpose, the present application provides a sound generator, including: a magnetically conductive plate;a first magnetic structure including a first magnet and a first washer connected to the first magnet, wherein the first magnet is provided on the magnetically conductive plate, the first washer is fixedly connected to a side of the first magnet away from the magnetically conductive plate, the first washer includes a first sub-washer provided in a middle area and a second sub-washer provided surrounding the first sub-washer, and a treble magnetic gap is formed between the first sub-washer and the second sub-washer;a second magnetic structure provided on the magnetically conductive plate and provided surrounding the first magnetic structure, wherein a bass magnetic gap is formed between the first magnetic structure and the second magnetic structure;a treble diaphragm and a treble voice coil, wherein the treble voice coil is provided on a side of the treble diaphragm close to the magnetically conductive plate and is provided corresponding to the treble magnetic gap; anda bass diaphragm and a bass voice coil, wherein the bass voice coil is provided on a side of the bass diaphragm close to the magnetically conductive plate and is provided corresponding to the bass magnetic gap. In some embodiments, the first magnet is configured as an integral structure, a first magnetic zone is formed in a middle position of the first magnet, a second magnetic zone is formed surrounding the first magnetic zone, and a non-magnetic zone is formed between the first magnetic zone and the second magnetic zone; a magnetizing direction of the first magnetic zone is opposite to a magnetizing direction of the second magnetic zone, the first sub-washer is provided corresponding to the first magnetic zone, and the second sub-washer is provided corresponding to the second magnetic zone; andthe magnetizing direction of the first magnetic zone is the same as a magnetizing direction of a magnet of the second magnetic structure. In some embodiments, the treble voice coil is provided corresponding to the non-magnetic area, and a ring width of the non-magnetic area is smaller than a ring width of the treble voice coil; and/or a diameter of the first magnetic zone is less than or equal to a ring width of the second magnetic zone. In some embodiments, the first magnet includes a first sub-magnet and a second sub-magnet, the first sub-magnet and the second sub-magnet are separately provided, the second sub-magnet is provided surrounding the first sub-magnet, and a magnetizing direction of the first sub-magnet is opposite to a magnetizing direction of the second sub-magnet; the first sub-washer is fixedly connected to the first sub-magnet, and the second sub-washer is fixedly connected to the second sub-magnet; andthe magnetizing direction of the first sub-magnet is the same as a magnetizing direction of a magnet of the second magnetic structure. In some embodiments, a gap between the first sub-magnet and the second sub-magnet is smaller than a gap between the first sub-washer and the second sub-washer; and/or a diameter of the first sub-magnet is less than or equal to a ring width of the second sub-magnet. In some embodiments, a sound outlet is provided at a position of the sound generator facing the treble diaphragm and is configured to radiate sound waves of the treble diaphragm; the sound outlet is provided corresponding to a center area of the bass diap