Magnetic circuit having dual magnets, speaker and vibration generating apparatus using the same

Abstract

A magnetic circuit having a dual magnet, a speaker and a vibration generating apparatus using the same are provided. The magnetic circuit includes a magnetic gap having a small magnetic loss and an increasing magnetic flux density, in which a uniform distribution of a line of magnetic force can be realized on yoke surfaces facing each other. The speaker includes lower and upper magnets which are disposed at a predetermine distance so that mutually identical polarities oppose each other; a first yoke integrally having a loop-type circulating circuit portion extended from the lower magnet to the upper magnet and an extension portion which is extended perpendicularly upwards from the lower magnet; a second yoke which connects between the lower and upper magnets and forms a magnetic gap between the second yoke and the extension portion of the first yoke; a coil dispose in the magnetic gap and wound around a bobbin; a frame which is extended from the first yoke; a vibrating diaphragm generating an acoustic sound in correspondence to a drive signal; a damper limiting a vibration range of the bobbin; and a center cap covering the bobbin.

Description

technical field [0001] The present invention relates to a magnetic circuit with double magnets and a loudspeaker and a vibration generating device with the magnetic circuit, in particular to such a magnetic circuit with double magnets and a loudspeaker and a vibration generating device with the magnetic circuit, wherein the double magnetic The circuit includes P-type magnets and F-type magnets, which have a small amount of magnetic loss and increased magnetic flux density in the magnetic force gap, thereby achieving uniform magnetic force line distribution on the yoke surfaces facing each other and forming a magnetic force gap, thus having high efficiency and high efficiency. output and low frequency distortion. Background technique [0002] In general, sound reproduction equipment can be classified into horn speakers; system speakers (which are used in hi-fi audio systems such as component systems having woofer speakers, midrange speakers, and tweeters covering certain freq...

AI Technical Summary

Problems solved by technology

However, although it allows users to feel three-dimensional vibrations corresponding to audio signals, the magnetic force used to drive the diaphragm is not strong enough for aerobic exercise

That is, since the magnetic force of a direct current (DC) field using permanent magnets does not exceed 5000 Gauss at its normal limited amplitude, such vibrators are not suitable for driving a diaphragm for aerobic exercise organization

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