KR200304377Y1 - a vibration speaker - Google Patents

Abstract

The present invention relates to a vibrating speaker, and more particularly, a vibrating body composed of a cylindrical U-yoke, a donut-shaped magnet, and a yoke plate are stacked inside a cylindrical housing while being supported by a leaf spring, and a voice on the bottom thereof. In a conventional vibrating speaker having a top plate provided with a coil, the vibrating body alternately stacks a yoke plate and a magnet in a U-yoke, and overlaps the triple layer, so that the voice coil is adjacent to the yoke plate of the intermediate layer. Since the repulsive force and the attraction force are generated during magnetic induction, the vibrating body moves only within a certain range, thereby limiting the vibration band within a certain range, thereby eliminating sound interference and unnecessary sounds, thereby enabling more accurate reproduction of sound.

Description

Vibration speaker {a vibration speaker}

The present invention relates to a vibrating speaker, and more particularly, to a vibrating speaker capable of removing fine residual vibration by setting a limit of vibration by stacking magnets in multiple layers inside a vibrating speaker known as a conventional haptic speaker. .

In general, speakers are widely used for converting electrical signals into audible signals and outputting them in music, games, entertainment, and loudspeakers.

Recently, a vibrating speaker is provided to give a three-dimensional effect in music or video viewing, games, and entertainment for dancing.

The vibrating speaker may also be referred to as a bodily loudspeaker, and the body sense speaker is a sound rate output from the acoustical device if the acoustic sensation method by the audio device is simply dependent on the main auditory effect of hearing and feeling by the ear. It was developed to feel the strength and weakness of the body directly through sound pressure, as well as to enjoy the musical appreciation effect by hearing.

In other words, the sound rate output from the sound equipment is amplified through the control box, the mid and low bodily sensation spearger vibrates the whole body strongly and weakly according to the sound rate, and the sound rate is transmitted to enable the three-dimensional music listening effect. In particular, you will be able to listen to the vibration of the strong bass with the performance equivalent to that of the opposite speaker 100 ~ 200W.

FIG. 6 illustrates an embodiment of the conventional vibrating speaker, and is configured to generate sound or cause vibration by applying a high frequency current to the voice coil 42 ".

That is, the conventional vibrating speaker has a housing 9 "having a predetermined size space therein while forming an outer body, and a vibrating body 6" is provided at the center of the inner space of the housing 9 ". .

At this time, the vibrating body 6 "is formed by sequentially stacking a cylindrical U- yoke 66", a magnet 64 ", and a yoke plate 62" having an open top, and the U-yoke ( A pair of leaf springs 82 " and 83 " that are elastically fixed to the inner circumferential surface of the housing 9 "

At this time, the upper leaf spring (82 ") of the pair of leaf spring (82", 83 ") of the outer circumference is fixed to the upper inner peripheral surface of the housing 9", the outer circumference of the lower leaf spring (83 ") The bottom side is bonded and fixed to the adhesive in the state where the upper end surface is in contact with the stepped portion formed on the lower inner peripheral surface of the silver housing 9 ".

On the other hand, a magnet 64 "is attached to the inside of the center of the U-yoke 66", and a conductive yoke plate 62 "is attached to the upper surface of the magnet 64".

In addition, the upper plate 4 "is provided with an EVA gasket 2" attached to the upper surface and a through hole 44 "formed at the center of the housing 9" to generate sound. At the bottom of 4 "), a voice coil 42" is formed which is inserted between the outer periphery of the magnet 64 "and the inner periphery of the U-yoke 66".

In addition, in order to increase the amount of vibration of the vibration speaker having such a configuration, the U-yoke 66 '' is made of a mass having a weight.

In the conventional vibrating speaker having the above configuration, when the high frequency signal is input to the voice coil 42 ", the EVA gasket 2" is prevented by the electromagnetic force between the voice coil 42 "and the magnet 64". Since the vibration is finely generated to produce sound, it can be used as a speaker sound.

In addition, as the electromagnetic force generated by the magnetic induction between the voice coil 42 "and the magnet 64" is generated, the vibrating body moves up and down according to the Fleming's left hand law, and the up and down movement causes the leaf spring to It is to be transmitted to the housing 9 "to perform the vibration function.

That is, the conventional vibrating speaker is excited at a constant frequency using the resonant frequency of the vibrating body, thereby moving the vibrating body composed of the yoke plate 62 ", the magnet 64, and the U-yoke 66 in the up and down directions. To generate vibration.

By the way, such a conventional vibrating speaker is reduced in the low frequency (20 ~ 200 Hz) or high frequency (2 ~ 10 Hz) after the initial waveform shows a large waveform over a certain amplitude, this time the vibration over a certain amplitude Since the sound generated by the user feels a sense of rejection, there is a problem in that the correct sound cannot be reproduced.

The present invention is to solve the problems of the prior art, by limiting the vibration width of the vibrating body vibrating up and down while adjacent to the voice coil within a certain range to remove the unnecessary range of vibration to reproduce the sound more accurately It is an object of the present invention to provide a vibration speaker equipped with a center core.

Another object of the present invention is to enhance the damping function in the leaf spring supporting the vibrating body to reduce the change in the amount of vibration in accordance with the change in frequency to output a stable vibration characteristics.

1 is an exploded perspective view of a vibration speaker according to the present invention

2 is a cross-sectional view of an embodiment of a vibration speaker according to the present invention

3A is a perspective view showing a modified embodiment of the leaf spring in FIG.

3B is a cross-sectional view of another embodiment of the vibration speaker to which the leaf spring of FIG. 3A is applied.

4 is a graph showing the vibration characteristics of the vibration speaker according to the present invention

5A, 5B and 5C are cross-sectional views schematically showing the operation of the vibrating body in the vibrating speaker according to the present invention.

6 is a cross-sectional view of a conventional vibrating speaker

7 is a graph showing the vibration characteristics of a conventional vibration speaker

Explanation of symbols on the main parts of the drawings

2: EVA gasket 4: Top plate

6: vibrating body 9: housing

42: voice coil 62a, 62b, 62c: first, second, third yoke plate

63: screw 64a, 64b; Magnet

66: U-yoke 82: Upper leaf spring

83: lower leaf spring 92: space

820: concave groove 830: convex portion

In order to achieve the above object, the present invention is a cylindrical U-yoke, a donut-shaped magnet, and a vibrating body in which a yoke plate is stacked is mounted on the inside of the cylindrical housing while being supported by a leaf spring, and a voice coil is provided on the bottom thereof. In the normal vibrating speaker formed by fastening the top plate,

The vibrating body is configured to alternately stack the yoke plate and the magnet in the U-yoke, and overlap the triplet, and the voice coil is adjacent to the yoke plate of the intermediate layer.

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

1 is an exploded perspective view of a vibration speaker according to the present invention, Figure 2 is a cross-sectional view of an embodiment of a vibration speaker according to the present invention, Figure 3a is a perspective view showing a modified embodiment of the leaf spring in Figure 1, 3B is a cross-sectional view of another embodiment of the vibration speaker to which the leaf spring of FIG. 3A is applied, and FIG. 4 is a graph showing vibration characteristics of the vibration speaker according to the present invention.

First, the present invention has a cylindrical housing (9) having an upper portion and a space portion (92) therein so that the upper plate (4) with the EVA gasket (2) for sound generation on the upper surface is installed;

The U-yoke 66 is provided at the inner center of the housing 9 and is fixed to the inner circumferential surface of the housing by upper and lower leaf springs 82 and 83 spaced at a predetermined interval, and the U-yoke 66. A vibrating body 6 composed of a magnet 64 attached to the upper and lower portions of the upper and lower poles of the upper and lower poles to form a magnetic circuit and fixed by the yoke plate 62;

And a voice coil 42 installed on a bottom surface of the upper plate 4 installed at an upper end of the housing 9 and inserted between the yoke plate 62 and the U-yoke 66. The structure of the vibration speaker of the basic configuration.

In the above-described basic configuration, the vibrating body 6 stacks disc-shaped first, second, and third yoke plates 62a, 62b, and 62c inside the U-yoke 66, but includes a first yoke. A disc shaped first magnet 64a is inserted between the plate 62a and the second yoke plate 62b, and a disc shaped second magnet is provided between the second yoke plate 62b and the third yoke plate 62c. By inserting 64b, the plurality of yoke plates 62a, 62b, 62c and the magnets 64a, 64b are fastened with screws 63 to be fixed.

On the other hand, the voice coil 42 is a coil wound so that the direction of the force acting when a (+) current is applied and the magnetic force flows from the N pole to the S pole is directed upward, the second yoke plate provided in the intermediate portion It is located between the outer periphery of 62b and the inner periphery of U-yoke 66.

Looking at the operation of the present invention configured as described above are as follows.

First, in the embodiment of the present invention, the voice coil 42 sets the winding direction of the coil so that the direction of the force acting when the positive current is applied and the magnetic force flows from the N pole to the S pole is directed upward.

In addition, the flow of the magnetic field between the first, second, and third yoke plates 62a, 62b, and 62c, the magnets 64a, 64b, and the U-yoke 66 is shown in FIG. The flow of the magnetic field was set from the S pole to the N pole between the yoke plate 62a and the U-yoke 66 and the magnetic field from the N pole to the S pole between the second yoke plate 62b and the U-yoke 66. The flow of was set, and the flow of the magnetic field was set from the S pole to the N pole between the third yoke plate 62c and the U-yoke 66.

When a current is applied to the voice coil 42, the first, second, and third yoke plates 62a, 62b, 62c and the magnets 64a, 64b, and the U-yoke 66 are formed by magnetic induction. As the current flows, the direction of the force is generated vertically by Fleming's left-hand law, which causes the vibrator 6 to vibrate up and down.

At this time, the upper and lower vibration width of the vibrating body 6 is described with reference to the drawings,

First, FIG. 5B illustrates the movement when the vibrating body 6 descends. When a positive current of the AC current AC is applied to the voice coil 42, the direction of the force is upward (in the present invention, the voice coil). Since it is fixed while being inverted, the force acts downward in the drawing), so that the vibrating body 6 is moved while being pushed downward by the repulsive force.

However, when the voice coil 42 is adjacent to the third yoke plate 62c of the uppermost layer, the voice coil 42 is affected by the opposite polarity (S-> N), so that the force acts downward (in the present invention, the voice coil is inverted. Since the vibrating body is pulled upward in the drawing because it is fixedly installed, the vibrating body 6 moves upward.

Because the voice coil 42 is initially set so that the direction of force is directed upward when the magnetic field is formed from the north pole to the south pole, when the magnetic field is formed from the south pole to the north pole, the direction of the force is reversed by reversal. Is headed.

5C shows the movement when the vibrating body 6 rises, and the vibrating body 6 rises so that the voice coil is adjacent to the first yoke plate 62a of the lowermost layer. Since the negative current of the AC current is applied, the direction of the force is directed to the lower side (in this design, the force is applied to the upper side because the voice coil is fixedly inverted). The vibrating body 6 is moved while being pulled upward.

However, at this time, the positive current is formed in the region where the magnetic field is formed from the S pole on the side of the first yoke plate 62a to the N pole by the (−) current. (In this design, since the voice coil is fixed while being inverted, the force acts downward in the drawing.) The vibrating body 6 is lowered.

Therefore, as shown in FIG. 4, the magnetic field flow and voice coil between the upper, middle, and lower layers of the first, second, and third yoke plates 62a, 62b, 62c, and the U-yoke 66 are formed. As the direction of the force changes according to the position of 42), the vibrating body 6 vibrates up and down, and the vibration width can be limited within a predetermined range by limiting the vibration width not to exceed a certain range, thereby eliminating negative distortion. You can play the sound.

Meanwhile, FIGS. 3A and 3B show another embodiment of the upper and lower leaf springs 82 and 83 in the present invention, and the inner circumferential edges of the U-yoke 66 and the magnets 64a and 64b and the yoke plate ( A plurality of upper and lower portions provided to contact the outer periphery of the vibrating body 6 composed of 62a, 62b and 62c, and the outer periphery to be in contact with the inner periphery of the housing 9 to support the vibrating body 6. The structure of the upper and lower leaf springs is improved.

That is, the upper leaf spring 82 ′ forms a circular concave groove 820 ′ recessed downward, and the lower leaf spring 83 ′ forms a circular convex portion 830 ′ protruding upward. The elasticity can be increased so that the vibration of the vibrating body 6 can be more absorbed.

Therefore, by removing the repulsive force that interferes with the vibration waveform generated when the vibrating body 6 is vibrated, by increasing the vibration force it is possible to maintain the original vibration waveform to enable more accurate sound reproduction.

Hereinafter, reference numeral 50 denotes a guide ring 50 for supporting the upper and lower leaf springs 82 and 83.

As described above, the vibrating speaker according to the present invention alternately installs a plurality of magnets and yoke plates inside the U-yoke that is installed inside the housing, and then installs the voice coil adjacent to the yoke plate of the intermediate layer. When induced, repulsive force and attractive force are generated so that the vibrating body moves only within a certain range, thereby limiting the vibration band within a certain range, thereby providing more accurate sound reproduction by eliminating sound interference or unnecessary sounds.

Claims (3)

A cylindrical housing having an upper portion and a space portion formed therein so that an upper plate having an EVA gasket for sound generation is installed on an upper surface thereof; A cylindrical U- yoke is provided at the inner center of the housing and is fixed to the inner circumferential surface of the housing by upper and lower leaf springs spaced at regular intervals, and the N and S poles are polarized up and down at the upper end of the U-yoke. A vibrating body attached to constitute a magnetic circuit and composed of a donut-shaped magnet fixed by a yoke plate; In the structure of a conventional vibrating speaker comprising a; voice coil is installed on the bottom surface of the upper plate installed on the upper end of the housing and inserted between the yoke plate and the U- yoke, The vibrating body 6 sequentially stacks the first yoke plate 62a, the second yoke plate 62b, and the third yoke plate 62c inside the U-yoke 66, and the first yoke. The first magnet 64a is inserted between the plate 62a and the second yoke plate 62b, and the second magnet 64b is inserted between the second yoke plate 62b and the third yoke plate 62c. It is made to be fixed in three steps overlapping, And the voice coil (42) is positioned between the outer circumference of the second yoke plate (62b) and the inner circumference of the U-yoke (66). According to claim 1, wherein the voice coil 42 is wound around the coil in one direction so that the direction of the force acting when a (+) current is applied and the magnetic force flows from the N pole to the S pole is directed upwards. Vibration speaker. The upper leaf spring 82 'is formed with a circular concave groove 820' recessed downwardly, and the lower leaf spring 83 'has a circular convex portion protruding upward. 830 ') is formed, characterized in that the vibration speaker.