Ultra-thin high-resolution electromagnetic speaker with bridge edge method

Abstract

The present invention relates to an ultra-thin high-resolution electromagnetic speaker of a bridge-shaped edge type. A pair of magnetic circuits stacked on the upper and lower parts of a vibration module, that is, a coil and a permanent magnet are arranged in a horizontal configuration, and the permanent magnet is arranged on the coil. The inner side, so as to ensure the ultra-thin speaker, the distance between the opposite poles of the permanent magnet is approached by the limiter, and the inner magnetic field of the permanent magnet can be used as the driving bias of the vibration plate, which can reduce the magnetic resistance and improve the efficiency increased effect.

Description

technical field [0001] The present invention relates to an ultra-thin high-resolution electromagnetic speaker of a bridge-shaped edge type, and more particularly relates to an ultra-thin high-resolution electromagnetic speaker of a bridge-shaped edge type in which a pair of magnetic That is, the coil and the permanent magnet are arranged horizontally to obtain a thin speaker, and the magnetic force between the coil and the vibrating body is directly transmitted through the vibration module composed of a soft strong magnetic shock absorber, thereby reducing the magnetic force. resistance and improve sound conversion efficiency, and can amplify bass at the same time. Background technique [0002] In general, in an electromagnetic (Electro-magnetic) speaker, the AC magnetic force generated by the coil wound around the wire interacts with the DC magnetic force induced by the permanent magnet to generate force. Although the principle is the same as that of an electro-magnetic spe...

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Problems solved by technology

[0007] However, in the electromagnetic speaker of Document 1 as described above, the magnetic circuit has a horizontally arranged structure in which the coil is provided inside the permanent magnet, and the enlargement of the outer diameter of the coil is limited, so the change in impedance is also limited, so it is difficult to achieve thinning.

[0008] In addition, as the driving bias of the vibrating plate, it is necessary to use the outer magnetic field at the upper and lower parts of the permanent magnet assembled outside the upper coil and the lower coil, so there is a problem that the distance between the opposite poles of the permanent magnet is long, and the This increases the reluctance while reducing the sound conversion efficiency

[0009] In addition, after the permanent magnets are inserted outside the coil to form a magnetic circuit, gap guides are provided between the permanent magnets of the magnetic circuit, so only assembly tolerances of the magnetic circuit can occur, and there is a problem that not only is it difficult to maintain the upper Symmetry between the coil and the lower coil, and it may also be difficult to achieve uniformity of sound pressure / characteristics in operation

[0010] In addition, the vibrating plate is supported by an additional upper damper and lower damper-ring, and a gap guide is provided outside the vibrating plate, so there is a problem that the number of parts and assembly processes are many, and gaps may occur The height and size of the shock absorber ring are uneven. If this unevenness occurs, it will not only hinder the uniformity of characteristics / sound pressure / reproduction frequency, but also cause bass leakage.

[0011] In addition, since the vibration plate is a single vibration plate integrated with a plate shape such as a circle or an ellipse, the expansion of the treble and bass ranges is limited. If the vibration plate is set in a dome or conical shape, the full frequency band can be realized. , but due to the strong elasticity of the amorphous alloy material, it is difficult to form and manufacture, so there is a problem of increased manufacturing costs

[0012] In particular, most of the conventional electromagnetic speakers including Document 1 have high resolution, but most of them are not ideal in the amplification performance of the bass and subwoofer, and the treble, midrange, and bass are separately provided and combined. These are systemized to amplify the frequency reproduction bandwidth, and it is difficult to widely use it as a high-performance speaker due to cost constraints and low sound conversion efficiency.

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