Speaker

Abstract

A speaker includes: a magnetic circuit; a voice coil bobbin; a voice coil; a diaphragm; a frame to which the outer circumference of the diaphragm is connected via a suspension; and a spider to support the center area of the diaphragm. A magnet unit, a pole piece, a pole piece, and a yoke are included in the magnetic circuit. The yoke has a ring shape with a center opening, and is disposed at the rear of the magnet unit. The magnet unit has a ring structure having a plurality of empty portions arranged equiangularly, and the spider includes a main body and a plurality of legs extending radially outwardly from the main body and is disposed inside the magnetic circuit such that distal end tips of the legs pass beyond the inner diameter of the ring structure of the magnet unit.

Description

technical field [0001] The present invention relates to a speaker for various audio equipment. Background technique [0002] Speakers are widely used not only in home or car audio equipment, but also in various electronic equipment such as personal computers, mobile phones, game consoles, thin screen TVs, and the like. Speakers used in such devices are required to provide excellent sound quality and have a large input capacity even though they are small in size and thin. [0003] Figure 14 A conventional loudspeaker is shown. refer to Figure 14 , the loudspeaker 100 generally includes: a magnetic circuit 104 configured to sandwich a magnet 101 between a pole piece 102 and a yoke 103 formed into a pot shape, a magnetic gap 105 is formed in the magnetic circuit 104; a frame 106, Its inner periphery is connected to the outer periphery of yoke 103; Surrounding thing 107, its outer edge is connected to the front peripheral surface of frame 106; Diaphragm 108, its periphery is...

AI Technical Summary

Problems solved by technology

However, in the speaker 100, there is a problem that when the voice coil 109 vibrates greatly, the multi-leg 111 comes into contact with the pot-shaped yoke 103 of the magnetic circuit 104, thereby generating noise

[0009] In the speaker disclosed by the aforementioned Japanese Patent Application Laid-Open No. 9-238396, since it is impossible to set the outer diameter of the multi-leg to be larger than the inner diameter of the voice coil bobbin, the rigidity of the multi-leg cannot be sufficiently reduced, Therefore, its lowest resonance frequency (hereinafter referred to as "resonance frequency" where appropriate) cannot be lowered, that is, the sound pressure level cannot be increased in the bass range.

[0010] In the loudspeaker disclosed by the Japanese Patent Application Laid-Open No. 2003-339099, when the diameter of the loudspeaker is small and the diameter of the voice coil bobbin is relatively large, the difference between the outer diameter and the inner diameter of the multi-leg is forced to become smaller. Therefore, the similar patent The loudspeaker of Document No. H9-238396 cannot sufficiently reduce the stiffness of the multi-legs to lower the resonance frequency of the multi-legs, that is, it cannot increase the sound pressure level in the bass range

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