Hybrid movable coil plate and flat plate-type speaker using same

Abstract

The present invention relates to a hybrid movable coil plate and a flat plate-type speaker, and more specifically, to a hybrid movable coil plate and a flat plate-type speaker, the hybrid movable coilplate having a coil pattern-printed on one lateral surface of the movable coil plate, and a wound copper wire coil attached to the other lateral surface so as to increase an induced electromotive force, and thus improve the sound pressure of a speaker. The hybrid movable coil plate for the flat plate-type speaker, according to the present invention, has a spiraled copper wire coil attached to onesurface thereof and a PCB coil pattern-printed to the other surface thereof, wherein the copper wire coil and the PCB coil are formed into a track shape, and a pair of lead wire connection terminalsare formed, and one or more via holes for electrically connecting the copper wire coil and the PCB coil, and at least one among the one or more via holes has a copper plate formed at the surrounding thereof.

Description

technical field [0001] The present invention relates to a hybrid movable coil plate and flat-panel loudspeaker, and more specifically relates to increasing the induced electromotive force by pattern-printing a coil on one side of the movable coil plate and attaching and winding a copper wire coil on the other side, thereby A hybrid movable coil plate and flat-panel speaker that improves the sound pressure of the speaker. Background technique [0002] The movable coil plate used in the flat-panel speaker is wound on one or both sides of the plate-shaped coil base in an elliptical shape or printed and patterned. [0003] When a current flows in the movable coil of the movable coil plate, the current flowing at this time generates a magnetic field that expands and then contracts at the same frequency as the audio signal around the movable coil, because the movable coil is generated by the magnet inside the speaker unit Therefore, corresponding to this magnetic field, the movab...

AI Technical Summary

Problems solved by technology

[0007] The coiled copper wire movable coil starts from the outer contour of the coil track and ends on the inside of the coil track, so it is very difficult to electrically connect the + and - leads. In the case of winding with a single copper wire, in order to increase the "L" value However, it is necessary to increase the number of turns (Turn number) of the track. In this case, there is a problem that the impedance increases proportionally with the increase of the number of turns. In order to increase the number of turns while maintaining the impedance, thick copper wire winding is required. At this time There is a contradiction in the inversely proportional correlation relationship between the increase in the number of turns and the increase in the overall thickness and weight of the movable coil

[0008] In addition, in the case of a pattern-printed PCB movable coil, the two layers of the coil track type with a two-layer structure can only be connected in series. In the case of only series connection, the impedance increases proportionally with the number of turns of the coil track. large and thus not very efficient in controlling the impedance

[0009] Moreover, in the case of printing planar coil tracks on PCBs with a multi-layer structure of more than four layers, the number of turns can be increased through PCB fine process technology to increase the "L" value, and the efficiency can be improved through series and parallel combinations between layers. However, for the fine process of PCB and the PCB characteristics of multilayer structure, the formation of extremely wide dispersion in impedance management leads to a decrease in mass production efficiency. Therefore, the cost (Cost) of movable coils using multilayer PCBs increases, which cannot be significantly improved. The cost of components, the process of precision designing the PCB pattern of the multi-layer structure, printing the coil track, correcting the data of the product, and improving the design after each time is complicated and consumes a lot of money

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