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CN-122027956-A - Moving coil loudspeaker and electronic equipment

CN122027956ACN 122027956 ACN122027956 ACN 122027956ACN-122027956-A

Abstract

The application provides a moving coil loudspeaker and electronic equipment, and relates to the technical field of loudspeakers, wherein the moving coil loudspeaker comprises a loudspeaker body with a magnetic circuit system, the magnetic circuit system comprises a magnetic yoke, a magnet and a magnetic washer which are sequentially overlapped, and further comprises a tuning mass damper, the magnetic yoke or the magnetic washer is provided with a containing cavity, the tuning mass damper is arranged in the containing cavity, one end of the tuning mass damper is connected with the magnetic yoke or the magnetic washer provided with the containing cavity, gaps suitable for vibration movement of the tuning mass damper are formed between the tuning mass damper and all cavity walls and opening planes of the containing cavity, so that vibration is directly restrained from the source, and the advantages of high efficiency vibration suppression and vibration transmission reduction are achieved.

Inventors

  • Xu Haojian
  • WEN YUANHONG
  • LI XUEMEI
  • WANG LIHONG
  • LI MENGQIU
  • ZHAO WEIHAI
  • LI DAN

Assignees

  • 佛山鋐利电子有限公司

Dates

Publication Date
20260512
Application Date
20260211

Claims (11)

  1. 1. The moving coil loudspeaker comprises a loudspeaker body with a magnetic circuit system (1), wherein the magnetic circuit system (1) comprises a magnetic yoke (101), a magnet (102) and a magnetic washer (103) which are sequentially overlapped, and is characterized by further comprising a tuning mass damper (2), a containing cavity (3) is arranged on the magnetic yoke (101) or the magnetic washer (103), the tuning mass damper (2) is arranged in the containing cavity (3) and one end of the tuning mass damper is connected with the magnetic yoke (101) or the magnetic washer (103) provided with the containing cavity (3), and gaps suitable for vibration movement of the tuning mass damper (2) are reserved between the tuning mass damper (2) and all cavity walls and opening planes of the containing cavity (3).
  2. 2. Moving-coil loudspeaker according to claim 1, characterized in that the tuning mass damper (2) comprises an elastic support (201) and an inertial mass part (202), the inertial mass part (202) being arranged in the receiving chamber (3) with the gap between all chamber walls and opening planes of the receiving chamber (3), one end of the elastic support (201) being fixedly connected with the magnetically conductive yoke (101) or the magnetically conductive washer (103) provided with the receiving chamber (3), the other end being fixedly connected with the inertial mass part (202).
  3. 3. The moving coil loudspeaker according to claim 2, wherein the elastic support member (201) is a spring plate and the inertial mass member (202) is a sheet-like member.
  4. 4. Moving coil speaker according to claim 2, characterized in that the magnetically conductive yoke (101) or the magnetically conductive washer (103) provided with the receiving cavity (3) is provided with a first mounting groove (4) adapted to be fitted into one end of the elastic support member (201), the inertial mass member (202) is provided with a second mounting groove (2021) adapted to be fitted into the other end of the elastic support member (201), and both ends of the elastic support member (201) are fitted into the first mounting groove (4) and the second mounting groove (2021), respectively.
  5. 5. The moving coil loudspeaker according to claim 2, characterized in that the elastic support (201) is fixedly connected with the magnetically conductive yoke (101) or the magnetically conductive washer (103) provided with the accommodating cavity (3) and the elastic support (201) and the inertial mass part (202) by riveting or laser welding.
  6. 6. Moving coil speaker according to claim 2, characterized in that the inertial mass (202) does not exceed the opening of the receiving cavity (3) in a vibrating state and does not collide with the cavity wall of the receiving cavity (3).
  7. 7. The moving coil speaker of claim 6 wherein said gap is not less than 0.2mm.
  8. 8. Moving coil speaker according to claim 1, characterized in that the natural frequency of the tuned mass damper (2) is equal to a target rejection frequency, which is the main structural resonance frequency of the complete machine or critical components of the electronic device to which the moving coil speaker is applied.
  9. 9. The moving-coil loudspeaker according to claim 1, wherein the accommodating cavity (3) is disposed in a non-critical magnetic conductive region of the magnetic conductive yoke (101) or the magnetic conductive washer (103), the non-critical magnetic conductive region being a region where effects on an effective cross-sectional area of a main magnetic flux path of the magnetic circuit system (1) and magnetic field uniformity and magnetic field strength of a magnetic gap of the magnetic circuit system (1) are smaller than corresponding tolerance upper limits.
  10. 10. The moving coil loudspeaker according to claim 1, wherein the loudspeaker body further comprises a vibrating diaphragm (5), a voice coil (6) and a support (7), the support (7) is arranged around the magnetic circuit system (1), the vibrating diaphragm (5) is covered on one side, away from the magnetic circuit system (1), of the support (7), and the voice coil (6) is arranged on the side, close to the magnetic circuit system (1), of the vibrating diaphragm (5).
  11. 11. An electronic device comprising a moving coil speaker according to any one of claims 1-10.

Description

Moving coil loudspeaker and electronic equipment Technical Field The application relates to the technical field of speakers, in particular to a moving coil speaker and electronic equipment. Background In products such as a portable electronic device, a notebook computer, an integrated machine, and the like, a moving coil speaker is used as a main acoustic output unit, and vibration is inevitably generated when the speaker is operated. These vibrations are transmitted to the equipment housing through the magnetic circuit system of the speaker and its mounting structure, and the resonance of the whole machine is easily excited. The resonance phenomenon generated by the method can cause unpleasant touch vibration of a user, namely 'tingling hands', particularly on a device shell (such as a palm support area of a notebook computer), seriously affects user experience, and causes the product to be perceived as poor in quality. In addition, the vibration may interfere with the delicate components inside the device, affecting its proper operation. In response to the vibration problems described above, vibration suppression schemes commonly employed in the prior art, such as strengthening the overall structure or adding damping material between the speaker and the equipment housing, are essentially "passive interception" or "post-remediation" measures performed downstream in the vibration transmission path. However, as electronic devices increasingly move toward lighter, thinner, and more integrated electronic devices, these conventional approaches face a number of inherent contradictions and limitations. In particular, they tend to encroach on valuable internal space, have limited vibration-inhibiting effects and unstable performance, and at the same time increase the manufacturing cost of the product, making it difficult to fundamentally solve the problem of vibration transmission. More importantly, in the field of miniature electroacoustic devices, it is widely believed by those skilled in the art that the magnetic circuit system is an absolute core of electro-mechanical-acoustic energy conversion, and any non-magnetically conductive physical modification will be considered a priori as necessarily destroying the symmetry and uniformity of the magnetic field, thereby resulting in degradation of the speaker core performance. Under such a well-established thinking, conventional techniques aimed at improving vibration problems are limited to external improvements of magnetic circuit systems. Therefore, how to break the technical prejudice and realize efficient vibration suppression from the vibration source is a technical problem to be solved currently. In view of the above, there is a need in the art for improvements. Disclosure of Invention The application aims to provide a moving coil loudspeaker and electronic equipment, which have the advantages of high efficiency vibration suppression and vibration transmission reduction. The application provides a moving coil loudspeaker which comprises a loudspeaker body with a magnetic circuit system, wherein the magnetic circuit system comprises a magnetic yoke, a magnet and a magnetic washer which are sequentially overlapped, and further comprises a tuning mass damper, wherein a containing cavity is formed in the magnetic yoke or the magnetic washer, the tuning mass damper is arranged in the containing cavity, one end of the tuning mass damper is connected with the magnetic yoke or the magnetic washer provided with the containing cavity, and gaps suitable for vibration movement of the tuning mass damper are formed between the tuning mass damper and all cavity walls and opening planes of the containing cavity. Preferably, the tuning mass damper comprises an elastic supporting member and an inertial mass member, wherein the inertial mass member is arranged in the accommodating cavity and has the gaps with all cavity walls and opening planes of the accommodating cavity, one end of the elastic supporting member is fixedly connected with the magnetic conductive yoke or the magnetic conductive washer provided with the accommodating cavity, and the other end of the elastic supporting member is fixedly connected with the inertial mass member. Preferably, the elastic support member is a spring plate, and the inertial mass member is a sheet member. Preferably, the magnetic yoke or the magnetic washer provided with the accommodating cavity is provided with a first mounting groove suitable for embedding one end of the elastic support member, the inertial mass member is provided with a second mounting groove suitable for embedding the other end of the elastic support member, and two ends of the elastic support member are respectively embedded in the first mounting groove and the second mounting groove. Preferably, the elastic support member is fixedly connected with the magnetic yoke or the magnetic washer provided with the accommodating cavity and the inertial mass member through a ri