KR20100009891A

KR20100009891A - Speaker

Info

Publication number: KR20100009891A
Application number: KR1020080070710A
Authority: KR
Inventors: 박순종
Original assignee: 에스텍 주식회사
Priority date: 2008-07-21
Filing date: 2008-07-21
Publication date: 2010-01-29

Abstract

The present invention relates to a speaker that can improve the sound quality by suppressing the split vibration of the diaphragm that degrades the sound quality by generating a peak (deep) in the acoustic characteristics.

The present invention is provided with a vibration plate for generating sound waves while vibrating at least one concave inlet for suppressing the undesired vibration for each regeneration frequency band, the concave portion is provided with a damping agent for adjusting the charge and damping coefficient of the mass to extend the regeneration frequency band By coating, the vibration reproduction band is expanded while suppressing the unwanted vibration for each frequency band during the vibration of the diaphragm, and the damping coefficient is adjusted, so that the unwanted vibration is further suppressed to improve the sound quality.

Description

Speaker {SPEAKER}

The present invention relates to a speaker, and more particularly, to a speaker capable of improving sound quality by suppressing split vibration of a diaphragm that degrades sound quality by generating peaks and deeps in a speaker's acoustic characteristics. .

In general, a speaker is a kind of acoustic device that generates sound waves by converting an electrical signal into a vibration signal, and the speaker includes a frame (1); A magnetic circuit part 5 coupled to the lower part of the frame 1 and formed of a yoke 2, a magnet 3, and a plate 4 to generate an electromagnetic force; Vibration unit is coupled to the frame 1 and the magnetic circuit unit 5 is formed of a voice coil 6, a damper 7, a diaphragm 8, an edge 9 to generate sound waves by generating vibration by electromagnetic force It consists of (10).

When the speaker is driven, an electromagnetic force is generated in the magnetic circuit unit 5, and when the current is applied to the voice coil 6, the voice coil 6 is moved up and down by the left hand law of Fleming caused by the electromagnetic force. The reciprocating motion is transferred to the diaphragm 8 bonded to the voice coil 6 to generate a sound wave by vibrating the diaphragm 8 up and down.

Here, the diaphragm 8 is a key component that determines the sound quality, tone, and frequency characteristics of the speaker, and the diaphragm 8 has peaks and dips in an acoustic characteristic curve according to its material, mass, and structure. deep) occurs and degrades sound quality.

The peaks and dips are mainly divided vibrations in which the diaphragm 8 does not vibrate the piston, or the diaphragm 8 does not follow the oscillation and causes phase interference in various places of the diaphragm 8 as the high frequency goes. It is known to cause unwanted vibrations.

Therefore, various techniques such as the vibration plate 8 being suppressed from undesired vibration or moving to a band that can be removed by a circuit combination such as a crossover have been studied. Specifically, the elastic modulus of the vibration plate 8 is examined. Increasingly, the technology of increasing the internal loss is in progress.

That is, without changing the material of the diaphragm 8, it is added to the upper surface of the diaphragm 8 in a vortex, a radial form or by adding or protruding ribs in the form of a water wave depending on the band or the diaphragm 8 ) To suppress unwanted vibrations.

However, the added or protruding ribs are limited in suppressing unwanted vibration because the addition of a mass agent for expanding the regeneration frequency band of the diaphragm 8 and the application of a damping agent for adjusting the damping coefficient are not easy.

An object of the present invention is to suppress the unwanted vibration of the diaphragm to determine the sound quality, tone and frequency characteristics of the speaker.

Another object of the present invention is to easily adjust the regeneration frequency band expansion and damping coefficient of the diaphragm.

The present invention frame;

A magnetic circuit unit coupled to a lower portion of the frame and coupled to a yoke, a magnet, and a plate to generate an electromagnetic force;

A vibration unit coupled to the frame and the magnetic circuit unit and coupled to a voice coil, a damper, a diaphragm, and an edge to generate sound waves by vibration; And

The vibrating plate of the vibrating unit includes a concave portion for suppressing undesired vibration for each reproduction frequency band.

The recess may include at least one of the diaphragm according to the regeneration frequency band of the diaphragm.

The concave portion may be filled with a mass agent extending in a regeneration frequency band, or the damping portion may be coated with a damping agent for adjusting a damping coefficient.

Therefore, according to the present invention, the diaphragm that generates sound waves while vibrating is provided with at least one concave part, and the concave part is coated with a damping agent for adjusting a mass charge and a damping coefficient to extend a regeneration frequency band, When the vibration is suppressed by the frequency band, the sound reproducing band is expanded while the damping coefficient is controlled, and thus the unwanted vibration is further suppressed to provide an effect of improving the sound quality.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a longitudinal cross-sectional view of a speaker according to an embodiment of the present invention, Figure 3 is a perspective view of a diaphragm of a speaker according to an embodiment of the present invention, Figure 4 is an enlarged longitudinal cross-sectional view of the diaphragm of a speaker according to an embodiment of the present invention. to be.

The present invention is composed of a frame 20, a magnetic circuit portion 30, a vibration portion 40.

The frame 20 is typically formed of a metal material, and provided in various sizes and shapes according to the type of the speaker to protect the interior.

The magnetic circuit unit 30 includes a yoke 31, a magnet 32, and a plate 33 for converting an input electrical signal into an electromagnetic force.

The yoke 31 forms a center pole in the center to form a flow passage of the magnetic flux.

The magnet 32 is mounted to the yoke 31 to generate a magnetic force.

The plate 33 is mounted on the upper surface of the magnet 32 to form a passage of the electromagnetic force generated in the magnet 32.

The vibration unit 40 generates sound waves while vibrating by the electromagnetic force of the magnetic circuit unit 30, and the voice coil 41, the damper 42, the diaphragm 43, the edge 44, and the dust cap 45. ).

The voice coil 41 is composed of a coil and a bobbin, and is mounted between the yoke 31 and the plate 33 to generate a driving force in a direction orthogonal to the magnetic force of the magnet 22. .

The damper 42 is coupled to the upper end of the voice coil 41 to maintain the driving force generated in the voice coil 41.

The diaphragm 43 is conical and has a lower end bonded to the voice coil 41 to generate sound waves while vibrating together according to the vertical movement of the voice coil 41.

The diaphragm 43 has at least one concave concave portion 50 on the upper surface to suppress unwanted vibration for each reproduction frequency band.

The concave inlet 50 has at least one first concave portion 51, a second concave portion 52, and a third concave having a predetermined length and interval according to the position of the regeneration frequency band of the diaphragm 43. A mouth 53 is provided.

The first concave portion 51 is provided in all directions at the inner central proximal position of the diaphragm 43 to suppress the undesired vibration of the middle and high frequencies.

The second concave portion 52 is provided at an outer position of the first concave portion 51 in all directions to suppress the midrange unwanted vibration of the diaphragm 43.

The third concave portion 53 is provided between the second concave portion 52 and the edge 44 to suppress low undesired vibration of the diaphragm 43.

The first concave portion 51 and the second concave portion 52 are provided in staggered positions to suppress undesired vibration caused by reverse resonance.

The first concave portion 51, the second concave portion 52, and the third concave portion 53 are filled with a mass agent 54 that adds mass for low-pass extension of the reproduction frequency band.

In addition, at least one or more of the first recess 51, the second recess 52, the third recess 53, a damping agent 55 for adjusting the damping coefficient of the reverse resonance in the regeneration frequency band ) Is applied.

The mass agent 54 is filled with any one of a synthetic resin, an adhesive, and a damping agent in liquid or gel form.

In addition, the mass agent 54 is filled or coated with a fluorescent material to give a sense of aesthetics.

The edge 44 maintains the vibration of the diaphragm 43 by bonding the upper end of the diaphragm 43 to the frame 20.

The dust cap 45 is bonded to the inner center of the diaphragm 43 to prevent the inflow of foreign matter.

According to the embodiment of the present invention, when the electromagnetic force is generated in the magnetic circuit unit 30, and the electromagnetic force is applied to the voice coil 41, the voice coil 41 is reciprocating up and down by the electromagnetic force, the diaphragm 43 ) Vibrates up and down to generate sound waves.

At this time, the diaphragm 43 has at least one first recess 51, second recess 52, and third recess 53 according to the position of the regeneration frequency band provided on the upper surface. Unnecessary vibration caused by divisional vibration between bands is suppressed.

In addition, the first concave portion 51, the second concave portion 52, and the third concave portion 53 is filled with a mass agent 54, which is a synthetic resin or adhesive in the form of liquid and gel, as shown in FIG. To extend the regeneration frequency band (low pass) of the diaphragm 43, or to damp one or more of the first recess 51, the second recess 52, and the third recess 53. 55) to adjust the damping coefficient of the regeneration frequency band of the diaphragm 43.

Therefore, the diaphragm 43 has a mass agent 54 on the first recess 51, the second recess 52, and the third recess 53 in the regeneration frequency band (high, mid, mid, and low) during vibration. And damping agent 55 reduces the occurrence of peaks and dips in the acoustic characteristic curve due to the split vibration and the reverse resonance from the edge 44, thereby suppressing the unwanted vibration.

1 is a longitudinal cross-sectional view of a conventional speaker

2 is a longitudinal sectional view of a speaker according to an embodiment of the present invention;

3 is a perspective view of a diaphragm of a speaker according to an embodiment of the present invention;

Figure 4 is an enlarged longitudinal cross-sectional view of the diaphragm of the speaker according to the embodiment of the present invention

* Description of the symbols for the main parts of the drawings *

20; Frame 30; Magnetic circuit part

31; Yoke 32; Magnet

33; Plate 40; Vibration part

41; Voice coil 42; Damper

43; Diaphragm 44; Edge

45; Dust cap 50; Indentation

51; A first recess 52; 2nd recess

53; Third indentation part 54; Mass agent

55; Damping agent

Claims

frame;

The vibrating plate of the vibrating unit includes a speaker for suppressing unwanted vibration.

The method of claim 1,

The diaphragm includes at least one recess in the upper surface.

The method of claim 1,

And a recess having a first recess, a second recess, and a third recess, having one or more predetermined lengths and intervals depending on the position of the frequency band of the diaphragm.

The method of claim 3, wherein

The first recessed part is provided in all directions near the inner center of the diaphragm in all directions to suppress the undesired vibration of the middle and high frequencies.

The method of claim 3, wherein

And the second recessed part is provided in an outer position of the first recessed part in all directions to suppress the undesired vibration of the midrange.

The method of claim 3, wherein

And the third concave portion is provided between the second concave portion and the edge to suppress low frequency unwanted vibration.

The method of claim 3, wherein

And a first recess and a second recess in a staggered position.

The method of claim 3, wherein

And the first indentation, the second indentation, and the third indentation are filled with a mass agent for low frequency expansion.

The method of claim 3, wherein

And a damping agent is applied to the first concave portion, the second concave portion, and the third concave portion to adjust a damping coefficient.

The method of claim 8,

The mass agent is a speaker for filling any one of a synthetic resin, an adhesive, a damping agent in a liquid or gel form.

The method of claim 8,

The mass agent is filled or coated with a fluorescent material.