Loudspeaker, yoke iron thereof and manufacture method of yoke iron

Abstract

The invention relates to a loudspeaker which comprises a frame body, a vibrating diaphragm, a front cover, a magnetic circuit device and a speech coil, wherein the front cover and the vibrating diaphragm are both arranged at one first face of the frame body, the front cover covers the vibrating diaphragm, the magnetic circuit device is arranged at one second face of the frame body, the speech coil is arranged on a path which generates magnetism on the magnetic circuit device, and the speech coil is combined with the vibrating diaphragm; in addition, the magnetic circuit device comprises yoke iron, a magnet and a magnetic pole piece, wherein the yoke iron is folded with a protrusion part which is sleeved with the magnet and the magnetic pole piece. The yoke iron is arranged in the loudspeaker, comprises two platform areas and the protrusion part, is formed between the two platform areas in a folding mode and is sleeved with the magnet of the loudspeaker. The invention can increase the arrangement area of the magnet and enhance the electric characteristic of the loudspeaker.

Description

technical field [0001] The invention relates to a loudspeaker yoke and a manufacturing method thereof, in particular to a loudspeaker capable of cooperating with a magnet with better electrical properties, its yoke and a manufacturing method of the yoke. It is utilized to become a quite practical and progressive new design, which is suitable for wide promotion and application in the industry. Background technique [0002] see Figure 1A and Figure 1B As shown in FIG. 2 , it is an exploded perspective view and a schematic cross-sectional view of an existing loudspeaker. The existing loudspeaker 1 is slightly rectangular and is composed of a frame body 10 , a front cover 11 , a magnetic circuit device 12 , a voice coil 13 and a diaphragm 14 . Magnetic circuit device 12, voice coil 13 and diaphragm 14 are all arranged between frame body 10 and front cover 11, and magnetic circuit device 12 is made up of a yoke 121, a magnet 122 and a magnetic pole piece 123, and magnet 122 a...

AI Technical Summary

Problems solved by technology

[0004] Since the forming accuracy of the central stud is better when the non-circular metal plate is stamped, and the flatness is easy to be caused by the different directions of the stress, so when the existing yoke is stamped and formed, usually only It is chosen to be stamped with a circular plate; however, the use of a circular plate to make the yoke will of course limit the design of the magnet, magnetic pole piece, voice coil and perforation of the frame to be circular. In this way, because The circular area that can be arranged on a non-circular area is limited by the width (that is, the diameter) is smaller than the length, so the area of ​​the magnet that can be arranged on a non-circular speaker (rectangular as shown in the figure) is just Not too large, the effect of electrical characteristics is relatively unsatisfactory

In addition, because it is made by stamping, the height of the central pillar of the yoke is also limited, and the magnet cannot be set with a higher size, which also has a considerable impact on the electrical characteristics.

[0005] This shows that above-mentioned existing loudspeaker obviously still has inconvenience and defect in structure, method and use, and urgently needs to be further improved

In order to solve the problems of loudspeakers, relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and general products do not have a suitable structure to solve the above problems. This is obviously related. The problem that the industry is eager to solve

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