KR20150112644A

KR20150112644A - Flat type speaker

Info

Publication number: KR20150112644A
Application number: KR1020140037214A
Authority: KR
Inventors: 김승곤
Original assignee: 디에스글로벌 (주)
Priority date: 2014-03-28
Filing date: 2014-03-28
Publication date: 2015-10-07

Abstract

The present invention relates to a flat speaker and, more specifically, to a flat speaker wherein the output of the speaker can be increased by winding a large amount of a voice coil in a limited space to increase the intensity of a magnetic field, and a large-sized speaker can be manufactured using a single voice coil instead of many voice coils. The flat speaker according to the present invention comprises: a diaphragm; a coil plate arranged below the diaphragm and including a pair of plates separated by a predetermined interval to face each other in a lateral direction; a voice coil swirled in a space between the pair of plates; and magnetic objects arranged at the outer sides of the pair of plates respectively.

Description

Flat type speaker {FLAT TYPE SPEAKER}

More particularly, the present invention relates to a flat-type speaker, and more particularly, it can increase the strength of a magnetic field by winding a large amount of voice coil in a limited space, thereby increasing a speaker output. To a flat-type speaker capable of being manufactured as a single voice coil.

As is known, a speaker is an acoustic device that emits a sound wave by generating a compact wave in air by converting an electric signal into vibration of a diaphragm. The principle of vibrating the diaphragm provided in the speaker is that when the diaphragm is vibrated at a low frequency by a Lorentz force generated when a current flows through a voice coil placed in a magnetic field, bass is generated and when a high frequency is generated, At this time, if the amplitude is increased even if the frequency is the same, the sound level becomes higher and the sound becomes larger in size.

1 is an exploded perspective view showing a conventional flat type speaker.

As shown, the flat speaker according to the present invention includes a diaphragm and a voice coil plate. The voice coil plate is configured such that at least one end face voice coil plate 101 is inserted into a groove formed between the magnetic bodies 200 and is vertically and horizontally inserted into a base frame (not shown) A pair of magnetic bodies 200 whose right and left polarities face each other are inserted and a single end voice coil plate 101 which is spaced apart from the diaphragm 300 such that it can be inserted into a groove formed in the magnetic body 200 is attached And the diaphragm 300 has a structure that is joined to a base frame (not shown).

On one side of the single-sided voice coil plate 101, a single-sided voice coil 105 is coupled in a track shape having an upper end and a lower end parallel to each other. The single-sided voice coil plate 101 has an upper end And the lower end of the upper plate 210 are positioned between the upper plate 210 and the lower plate 230, respectively.

2 is a plan view showing a conventional voice coil board for a flat type speaker.

2, a conventional voice coil board for a flat type speaker includes a coil attachment member 101 made of a non-magnetic material, and a coil attachment member 101 attached to the coil attachment member 101, An inner power supply line 105b in which an inner end portion that is vortexed on a plane is bent and exposed to the outside, and an outer power supply that is exposed to the outside on the plane of the coil attachment member 101 And a voice coil 105 including a wire 105a and has a structure in which a coil 105 is wound on only one side of the coil attachment member 101 as shown in FIG.

The conventional voice coil coils for a flat type speaker shown in FIG. 1 are inserted into the insertion grooves formed in the plate 200 on which the permanent magnets are installed and which are bent in a continuous uneven shape and attached to the vibration plate 300.

When a current flows through the voice coil 105, the voice coil plate 101 vibrates in a direction perpendicular to the vibration plate, so that the vibration plate attached to the voice coil plate is excited to emit a sound wave.

However, the conventional flat type speaker thus constructed has a structure in which a large number of coils can not be wound. Therefore, in order to solve such a problem, a technique of substituting a coil by patterning using a PCB up to six layers has been disclosed.

However, in this case, in order to manufacture a speaker having a large size, a thin PCB plate must be lengthened, which may deform the shape, and there is a problem that a plurality of voice coils of a certain size must be manufactured in order to manufacture a large speaker.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a planar speaker capable of increasing the intensity of a magnetic field by winding a large amount of voice coil in a limited space, have.

Another object of the present invention is to provide a flat-type speaker which can be manufactured as a single voice coil instead of a plurality of voice coils when manufacturing a large-sized speaker.

According to an aspect of the present invention, there is provided a flat speaker comprising: a diaphragm; A coil plate disposed below the diaphragm, the coil plate including a pair of left and right facing plates spaced apart from each other by a predetermined distance; A voice coil coiled in a space between the pair of plates; And a magnetic body provided outside each of the pair of plates.

Further, it is preferable that the coil plate further includes a winding portion for connecting a pair of facing plates spaced apart from each other.

It is also preferable that the voice coil is wound in a vertical direction around the winding portion.

It is preferable that the voice coil is wound in a track shape so as to have two parallel straight portions along the upper and lower portions of the winding portion.

The pair of plates may be fixed to the bottom surface of the diaphragm.

The magnetic body is preferably spaced apart from the pair of plates.

It is also preferable that the pair of magnetic bodies are formed to have different polarities in the vertical direction.

It is also preferable that the pair of magnetic bodies are disposed so that their upper and lower sides have different polarities.

In addition, the flat speaker according to the present invention includes a diaphragm; A coil plate coupled to a lower portion of the diaphragm and having a first magnetic body accommodated therein; A second magnetic body surrounding both side portions and a lower portion of the coil plate; And a voice coil wound on the outer side of the coil plate in a horizontal direction.

Further, the coil plate or the second magnetic body preferably has a concave shape in which a space is formed therein.

It is preferable that the voice coil is wound in a track shape so as to have two parallel straight portions along both side walls of the coil plate.

The coil plate is preferably fixed to the diaphragm.

The second magnetic body is preferably spaced apart from the coil plate by a predetermined distance from the bottom surface and the side surface.

It is also preferable that the first magnetic body is arranged so as to have different polarities from side to side.

It is preferable that the second magnetic body is disposed in a region adjacent to the first magnetic body with different polarities.

According to the present invention, since a large amount of voice coil is wound around a limited space, the intensity of the magnetic field can be increased, and the speaker output can be increased.

In addition, when manufacturing a speaker with a large size, it is possible to fabricate one voice coil instead of a plurality of voice coils.

1 is an exploded perspective view of a conventional flat type speaker.
Figs. 2 and 3 show a voice coil plate of the flat speaker shown in Fig. 1. Fig.
4 to 6 show a first embodiment according to the present invention.
7 to 9 show a second embodiment according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and an operation of an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

4 to 6 show a first embodiment 200 according to the present invention.

The first embodiment 200 of the present invention includes a vibration plate 210, a coil plate 220, a voice coil 230, and magnetic bodies 241 and 242.

The diaphragm is a known element that generates a vibration force by a force F1 generated by a magnetic field. At both ends of the diaphragm, a coupling portion 211 is formed to be coupled with a base frame (not shown) of a speaker.

Further, the coil plate 220 is further formed with a winding portion 223 for connecting the pair of plates 221 and 222 which are spaced apart from each other and formed in an 'H' shape.

Therefore, in the present embodiment 200, the voice coil 230 is wound around the winding portion 223 in the vertical direction. Depending on the shape of the winding portion 223, the voice coil 230 is wound in a track shape so as to have two parallel straight portions along the upper and lower portions of the winding portion 223.

Further, the pair of plates 221 and 222 may be fixed to the bottom surface of the diaphragm 210 by a bonding method or the like. Alternatively, the pair of plates may be fixed without being fixed.

The magnetic bodies 241 and 242 are preferably spaced apart from the pair of plates 220. To this end, the pair of plates 220 are provided with a pair of steel plates 251 and 252 respectively. Therefore, the magnetic bodies 241 and 242 are inserted between the upper and lower pairs of the iron plates 251 and 252, and the iron plate 251 located at the upper part is not formed unlike the present embodiment.

It is preferable that the pair of magnetic bodies 241 and 242 are formed so as to have different polarities in the vertical direction and the pair of magnetic bodies 241 and 242 are arranged so as to have polarities different from each other.

The operating state of the first embodiment thus configured will be described.

First, when a current (see arrow) is applied to the voice coil 230, a magnetic field (see arrow) is generated and the external force F1 acts on the diaphragm 210 to vibrate.

The configuration and operation of the second embodiment 300 according to the present invention will be described with reference to Figs. 7 to 9. Fig.

A second embodiment 300 according to the present invention includes a diaphragm 310, a coil plate 320 in which a first magnetic body 350 is accommodated, a second magnetic body 330, and a voice coil 340 do.

The second magnetic body 330 is configured to surround both sides and the lower portion of the coil plate 320.

Further, the coil plate 320 and the second magnetic body 330 may have a concave shape in which a space is formed.

The voice coil 340 is wound in a track shape so as to have two parallel straight portions along both side walls of the coil plate 320.

The coil plate 320 may be fixed to the diaphragm 310 by bonding or the like.

Further, it can be seen that the second magnetic body 330 is spaced apart from the coil plate 320 by a predetermined distance from the bottom surface and the side surface.

In addition, the first magnetic body 350 is disposed so as to have a different polarity from left to right, and the second magnetic body 330 has a different polarity from the region adjacent to the first magnetic body 350 .

The operation state of the second embodiment 300 configured as described above will be described.

First, when a current (see arrow) is applied to the voice coil 340, a magnetic field (see arrows) is generated and the external force F1 acts on the diaphragm 310 to vibrate.

200: First Embodiment
210: diaphragm 220: coil plate
230: voice coil 241, 242: magnetic body
300: Second Embodiment
310: diaphragm 320: coil plate
330: second magnetic body 340: voice coil
350: first magnetic body

Claims

tympanum;
A coil plate disposed below the diaphragm, the coil plate including a pair of left and right facing plates spaced apart from each other by a predetermined distance;
A voice coil coiled in a space between the pair of plates; And
And a magnetic body provided outside each of the pair of plates.

The method according to claim 1,
Wherein the coil plate further includes a winding portion for connecting a pair of facing plates spaced from each other.

3. The method of claim 2,
Wherein the voice coil is wound in a vertical direction around the winding portion.

The method of claim 3,
Wherein the voice coil is wound in a track shape so as to have two parallel straight portions along an upper portion and a lower portion of the winding portion.

The method according to claim 1,
And the pair of plates are fixed to a bottom surface of the diaphragm.

The method according to claim 1,
And the magnetic body is spaced apart from the pair of plates.

The method according to claim 1,
And the pair of magnetic bodies are formed with N poles and S poles in a vertical direction.

8. The method of claim 7,
Wherein the pair of magnetic bodies are arranged so that their upper and lower sides have different polarities from each other.

tympanum;
A coil plate coupled to a lower portion of the diaphragm and having a first magnetic body accommodated therein;
A second magnetic body surrounding both side portions and a lower portion of the coil plate;
And a voice coil wound around the coil plate in a horizontal direction.

10. The method of claim 9,
Wherein the coil plate or the second magnetic body has a concave shape in which a space is formed therein.

11. The method of claim 10,
Wherein the voice coil is wound in a track shape so as to have two parallel straight portions along both side walls of the coil plate.

10. The method of claim 9,
And the coil plate is fixed to the diaphragm.

13. The method of claim 12,
And the second magnetic body is spaced apart from the coil plate by a predetermined distance from the bottom surface and the side surface.

10. The method of claim 9,
Wherein the first magnetic body is disposed so as to have different polarities from left to right.

15. The method of claim 14,
And wherein the second magnetic body is disposed in a region adjacent to the first magnetic body and having different polarities.