Aac Microtech (changzhou) Co, , Ltd.

Zte Corporation

Shenzhen Lanhe Technologies Co., Ltd.

Aac Acoustic Technologies (shenzhen) Co., Ltd.

Aac Technologies Pte. Ltd.

Tencent Technology (shenzhen) Company Limited

Huawei Technologies Co., Limited

Tsinghua University

Suteng Innovation Technology Co., Ltd.

Changzhou University

Other

Vivo Mobile Communication Co., Ltd.

Sz Dji Technology Co., Ltd.

Byd Company Limited

Shenzhen Byd Auto R&d Company Limited

Wei Wei

Zhaoyu Yin

Huhu Yang

Zhizhu Chen

Yibo Li

Zhichen Chen

Zhong Yu

Peng Qin

Ji Wang

Chen Zhang

Zhou Zhi

Bin Tan

Wei Lv

Fei-Yu Kang

Bao-Hua Li

Ying Tao

Quan-Hong Yang

Yibin Lan

Kunxia Wei

Xiao-Yu Zheng

Yong Qing Wang

Jun Cheng

Tao Yang

Yang Zhang

Hongjun Wang

Chao Xu

Chen Huang

Yong Cheng

Xuyang Pan

Bin Cai

Wenli Wang

Jingjing Zhang

Ming Wang

Xiaojiang Han

Xiaohong Chen

Hua Yang

Jingyao Wang

Chuang Fu

Qingqing Zou

Huan Li

Ke Li

Wenze Yu

Changjie Luo

Zhaojing Liu

Juanjuan Wang

Zhaoxin Wen

Ruina Zheng

Ranliang Yuan

Xulong An

Yong Wang

Libo Yao

Dandan Wang

Yubin Liu

Feilong Jia

Fuqiang Chu

Qingbo Du

Jing Hu

Qiuhua Li

Tiantian Ding

Wenxin Hong

Liurong Qian

A coaxial speaker is disclosed. The coaxial speaker includes a magnetic circuit system and two sounding units. The magnetic circuit system includes a ring magnetic unit, a magnet and a yoke arranged on an outer side of the ring magnetic unit, and a first ring magnet sleeved on an insert inserted into an inner side of the ring magnetic unit. Magnetic polarities of the inner and outer surfaces of the first ring magnet are opposite. The first ring magnet together with the ring magnetic unit forms a first magnetic gap for one sounding unit. The ring magnetic unit together with the magnet and the yoke forms a second magnetic gap for another sounding unit. Diaphragms of the two sounding units are fixed to the ring magnetic unit. The coaxial speaker improves the low-frequency performance.

Coaxial speaker

The present disclosure provides a multifunctional sounder, including a casing having an accommodating cavity, and a sounding unit and at least one driving coil group that are arranged in the accommodating cavity. The sounding unit includes a sounding diaphragm system and a magnetic circuit system configured to drive the sounding diaphragm system along a first direction. The magnetic circuit system includes a main magnet and at least one secondary magnet group. Each secondary magnet group includes a plurality of secondary magnets. Each driving coil group includes at least one driving coil each corresponding to a respective secondary magnet group, and an orthographic projection of each driving coil group along the first direction misalign with the main magnet. Compared with related technologies, when adjusting the height of the sounder, only thicknesses of the secondary magnets need to be adjusted, thereby causing relatively small impact on the acoustic performance of the sounder.

Multifunctional sounder

The present disclosure provides a sounding device. The sounding device includes a vibration system, a magnetic circuit system, a conductive element and a fixed element. The vibration system includes a diaphragm and a voice coil fixed to the diaphragm. The sounding device also includes a reinforcement element for fixing the voice coil and the connection part. The reinforcement element includes a first reinforcement part fixed to the upper surface of the connection part or the lower surface of the connection part, and a second reinforcement part fixed to the outer side surface of the voice coil. Compared with the related art, the sounding device provided by the present disclosure has a simple structure and good reliability.

Sounding device

The present disclosure discloses a speaker comprising a frame, a vibration system, a magnetic circuit system, and a flexible circuit board; the magnetic circuit system comprising a lower clamping plate and a main magnet; the lower clamping plate comprising a lower clamping body, four rectangular through-holes and four first flanges; a portion of the lower clamping body located on the side of the rectangular through-hole away from the main magnet is square to and fixed to the frame and abuts against the flexible circuit board; the speaker further comprising four breathable isolators fixed to the lower clamping body and covering each of the rectangular through-holes. The speaker can be used in an environment with an open cavity in the sound producing cavity, with good leakage effect, low cost and excellent acoustic performance.

Speaker

Floor lamp

Screen protector applicator kit

A speaker includes a diaphragm, a voice coil with a lead wire, and a flexible circuit board assembly. The flexible circuit board assembly includes at least two flexible circuit boards and a soldering sheet. Each flexible circuit board includes an inner fixing portion including an upper surface close to the diaphragm, the upper surface of a first flexible circuit board is provided with a first pad, the upper surface of a second flexible circuit board is provided with a second pad. The lead wire is arranged on a side of the first flexible circuit board close to the diaphragm and is electrically connected to the first pad. The soldering sheet includes a first fixing portion electrically connected to the second pad, a second fixing portion and a third fixing portion electrically connected to a bottom surface of the voice coil. The speaker has a better acoustic performance.

A method, an apparatus and a device for suppressing a first HVDC commutation failure under an AC system fault are provided. The method includes: obtaining a three-phase voltage of a converter bus, and calculating a zero-sequence component amplitude and an αβ component amplitude; calculating a first trigger-angle command for a single-phase fault and a second trigger-angle command for a three-phase fault; selecting a smaller one of the first trigger angle command and the second trigger angle command as a trigger-angle command for an extinction-angle controller; and adjusting a trigger angle of the HVDC transmission system by using the trigger-angle command as an upper limit value for an output of the extinction-angle controller of the HVDC transmission system.

Control method and apparatus for high-voltage, direct current first commutation failure in alternating-current fault

The present disclosure provides a sounding device. The sounding device includes a vibration system, a magnetic circuit system, a conductive element and a fixed element. The vibration system includes a diaphragm and a voice coil fixed to the diaphragm. The sounding device further includes a reinforcement element having a first reinforcement part fixed to the upper surface of the connection part or the lower surface of the connection part, a second reinforcement part fixed to the outer side surface of the voice coil, and a third reinforcement part fixed with the upper surface of the voice coil. Compared with the related art, the sounding device provided by the present disclosure has a simple structure and good reliability.

A film applicator includes a frame including a positioning cavity for positioning an electronic device therein; a positioning film attached to the frame; and a protective film unit adhered to a side of the positioning film facing the electronic device. The protective film unit includes a protective film adhered to the positioning film; a release film adhered to a side of the protective film opposite to the positioning film; and a pull film fixed to one end of the release film such that the release film can be detached from the protective film by pulling the pull film to allow the protective film to be attached to the electronic device.

Film applicator

The sounding unit provided by the present invention includes a frame, a vibration system and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil and an FPC. The diaphragm consists of a dome with a protruded platform and a suspension. The FPC includes an internal fixed part, an external fixed part, and an elastic part. The internal fixed part includes a first fixed part, a second fixed part, and a third fixed part. The voice coil includes an upper end surface and a lower end surface. The upper end surface is fixed to the protruded platform. The lower end surface is fixed to the third fixed part. The bonding strength between the FPC and the voice coil in the sounding unit is improved, and the vibration stability of the sounding unit is enhanced.

Sounding unit

A speaker includes: a frame, a vibration system, including a diaphragm, a voice coil, and a flexible circuit board, and a magnetic circuit system, wherein the voice coil includes a first lead wire and a second lead wire, the flexible circuit board includes a first surface facing the diaphragm and a second surface opposite to the first surface, the first lead wire and the first surface are located at one side of the flexible circuit board, the second lead wire and the second surface are located at another side of the flexible circuit board, the flexible circuit board includes a first pad on the first surface and a second pad on the second surface, the first lead wire is connected to the first pad, the second lead wire is connected to the second pad. Compared with the related art, the speaker disclosed by the present disclosure has better acoustic performance.

Speaker with better acoustic performance structure

The present disclosure provides a sounding device. The sounding device includes a vibration system, a magnetic circuit system, a conductive element and a fixed element. The vibration system includes a diaphragm and a voice coil fixed to the diaphragm. The diaphragm consists of a dome part and a suspension around the dome part. The dome part includes a dome body and a protruded platform of the dome extending from the dome body to the voice coil and fixed to the voice coil. The dome part also includes dome reinforcement elements. Compared with the related art, the sounding device provided by the present disclosure has a simple structure and good reliability.

Disclosed are a voice coil and a sounding device using the voice coil. The coil body includes at least two sub coils fixed together in sequence. Each sub coil is provided with an incoming wire end and an outgoing wire end, and forms only one current path from the incoming wire end to the outgoing wire end and flowing in the same direction. The incoming wire ends of the at least two sub coils are welded together to form an incoming area on the coil body. The outgoing wire ends of the at least two sub coils are welded together to form an outgoing area on the coil body. The voice coil and the sounding device can select a wire with a lighter weight and a greater resistance, thereby decreasing a weight of a vibration system of the sounding device and improving a mid-frequency performance of the sounding device.

Voice coil and sounding device using same

Growing community of inventors

Shenzhen, China

Wei Wei