KR101587477B1 - Ultra-thin type speaker - Google Patents

Abstract

The present invention relates to an ultrathin loudspeaker and a method of manufacturing the same and an ultrathin loudspeaker capable of improving acoustic output efficiency by uniformly driving the entire surface of a vibrating portion by suppressing divided vibrations by using a direct current magnetic flux and an alternating magnetic flux, to provide. Such an ultrathin loudspeaker includes a cover portion for focusing DC magnetic flux and AC magnetic flux on a diaphragm; A permanent magnet embedded in the cover portion to form a DC magnetic flux loop and to vibrate the diaphragm with an attractive force or a repulsive force with the diaphragm magnetized by the coil; A coil embedded in a side surface of the cover to form an AC magnetic loop according to the direction of the AC current to magnetize the diaphragm; A guide portion located inside the coil, the guide portion for guiding the guide; And a diaphragm which is guided by the guide portion and is located inside the coil, is magnetized by an alternating magnetic flux loop formed in the coil, and vibrates according to attraction or repulsion force with the permanent magnet.

Description

Ultra-thin type speaker < RTI ID = 0.0 >

Some embodiments of the present invention relate to an ultrathin loudspeaker, and more particularly, to an ultrathin loudspeaker capable of improving acoustic output efficiency by uniformly driving the entire surface of a vibrating portion.

Generally speaking, a speaker is an electroacoustic transducer, and since the interest of the user is increasing with the development of the video apparatus, the communication apparatus, and the like, the speaker is more suitable for the video apparatus, the communication apparatus, Research is being conducted on the speaker for this purpose.

Moving coil loudspeakers are mainly used as general loudspeakers, but in particular, there are electrostatic loudspeakers, ribbon loudspeakers, piezoelectric loudspeakers and the like. There are radiative speakers that vibrate directly by vibrating the air and horn type speakers in which the diaphragm is placed in the horn. In addition, they may be classified according to the shape of the diaphragm, the driving method, and the reproducible frequency band.

For example, a horn type speaker is a horn-type speaker having good electrical and acoustical characteristics and does not require an acoustic box for accommodating a speaker. However, the minimum frequency of the sound output according to the diameter of the horn- . For this reason, a copy type speaker is mainly used for various electronic products or sound apparatuses. Condensed speakers are typical. The cone-shaped speaker has a cone-shaped diaphragm, which is less efficient than the mixed-type speaker, but can be made cheap and compact.

1 is a structural view of an embodiment of a general moving coil type speaker, which shows a moving coil type speaker that vibrates a diaphragm to directly vibrate air.

1, a speaker of a moving coil system includes a permanent magnet 101 as a ring, a front plate 103 and a back plate 105 provided on the upper and lower sides of the permanent magnet 101 Together with the pole piece 107 constitute a magnetic circuit. A gap is formed between the pole piece 107 and the front plate 103 with a gap formed between the pole piece 107 and the front plate 103. A voice coil 109 wound around the bobbin is installed in the gap, Lt; / RTI >

The diaphragm 113 is attached to the bobbin in order to increase the acoustic output by widening the vibration area and the diaphragm 113 is supported on the speaker frame 119 by using an edge of a flexible material or a surround 115 .

A speaker of a moving coil system is configured so that the magnetic flux of the permanent magnet 101 and the magnetic field of the voice coil 109 are applied to the voice coil 109 installed on the narrow gap between the permanent magnets 101 constituted by the N- A force proportional to the amount of current flowing and the number of turns of the voice coil 109 moves the voice coil 109 up and down (and hence the voice coil can be called a moving coil), and this kinetic energy is transmitted to the diaphragm 113, (113) The principle of generating sound by vibrating the front air (moving coil system) is used. That is, in the moving coil type speaker, the force generated by the interaction between the direct magnetic flux by the permanent magnet 101 and the magnetic flux by the voice coil 109 causes the voice coil 109 to move up and down, And generates the sound by vibrating the air on the front surface of the diaphragm.

As described above, since the moving coil type speaker is structured such that the voice coil 109 and the vibration plate 113 move together, the weight of the vibration system is increased, so that sound reproduction in the high frequency band is restricted and the overall sound output efficiency of the speaker is lowered.

Further, in the moving coil type speaker, divided vibrations in which the diaphragm portion joined to the voice coil 109 and the diaphragm portion not bonded to the voice coil 109 are vibrated differently are generated, so that the sound quality in the high frequency band is lowered, Is reduced.

Also, in the moving coil type speaker, disconnection of the wire of the voice coil junction occurs due to the up-and-down movement of the diaphragm 113, and noise is generated in the diaphragm 113 and the wire.

Since the vibration plate 113 of the moving coil type speaker is located above the permanent magnet 101, the total thickness of the speaker is determined by the sum of the height of the permanent magnet 101 and the height of the vibration plate 113, It is impossible to configure.

In order to overcome such a problem, studies have been made to reduce the weight of the vibration meter. One example of such a speaker is a balanced amateur speaker.

2 is a structural diagram of a typical balanced amateur speaker.

As shown in FIG. 2, the balanced amateur speaker places an electromagnet between the N pole and the S pole of the permanent magnet 201. The oscillator 207 of the armature 205 is switched to the N pole or the S pole according to the direction of the current by the principle of the electromagnet and the oscillator 207 and the permanent magnet The oscillator 207 vibrates up and down. The up and down kinetic energy of the vibrator 207 is transmitted to the diaphragm 213 through the connecting pin 211. The diaphragm 207 moves and the electric signal can be reproduced by the sound. Here, the reference numeral 209 is a stator.

These balanced amateur loudspeakers have the advantage of lowering the vibration system by separating the coil and diaphragm, so that the sound output efficiency is higher than that of the moving coil type. However, since the connecting pin 211 is attached near the coil 203 of the vibrator 207, the vibrating plate 213 can not be greatly vibrated because of the small vertical vibration amplitude, The entire diaphragm is hard to move in the same phase in the vertical direction due to the concentrated force applied to only one point of the diaphragm 213. As the diaphragm 213 becomes larger, the diaphragm does not move in the same phase, It is impossible to apply to a wide diaphragm. Further, since the diaphragm 213 is disposed above the electromagnet driver, it is difficult to design the diaphragm. Therefore, it can not be applied to a speaker requiring high output, and is limited to a cannular earphone and a hearing aid which have low acoustic output.

Fig. 3 is a structural view of a general planar magnet speaker, showing a planar magnet speaker in which the arrangement of the permanent magnet and the coil is different from that of the moving coil system.

At this time, the flat type magnet speaker uses the principle that the coil moves in the vertical direction when the current flows in the coil in the magnetic line range of the moving coil speaker vibration principle.

As shown in Fig. 3, the flat-plate-type magnet speaker has a structure in which a plurality of permanent magnets are alternately arranged with N poles and S poles to form a magnetic line of force (red line), a current is supplied to a thin film conductor connected to the diaphragm And the vibration of the conductor is generated to cause the entire diaphragm to move up and down, thereby solving the split vibration phenomenon.

In order to increase the acoustic output, however, the length of the thin film conductor must be made long, and the length of the thin film conductor is less than that of the moving coil system due to the characteristic of bonding the pattern plate to the diaphragm. In addition, a large number of permanent magnets are required to solve the problem of the acoustic output degradation, and thus the cost is increased, and the current of the thin film conductor increases at the time of high output.

Therefore, in order to further improve the performance of electronic devices, ultrathin loudspeakers having thin thickness and excellent sound reproduction performance are required.

The embodiment of the present invention provides an ultrathin loudspeaker capable of improving the sound output efficiency by uniformly driving the entire surface of the vibration portion. That is, the embodiment of the present invention provides an ultrathin loudspeaker capable of improving the sound output efficiency by suppressing the divided vibration by uniformly driving the entire surface of the vibration portion using the direct current magnetic flux and the alternating magnetic flux.

In addition, the embodiment of the present invention provides an ultrathin loudspeaker, which is implemented as an ultrathin type by disposing a driving part on a side surface of a vibrating part.

Further, the embodiment of the present invention provides an ultrathin loudspeaker capable of minimizing the weight of the vibrating portion by separating the coil from the vibrating portion and preventing the vibration of the vibrating portion from affecting the coil.

According to an aspect of the present invention, there is provided an ultrathin loudspeaker comprising: a cover part for focusing DC magnetic flux and AC magnetic flux on a diaphragm; A permanent magnet embedded in the cover portion to form a DC magnetic flux loop and to vibrate the diaphragm with an attractive force or a repulsive force with the diaphragm magnetized by the coil; A coil embedded in a side surface of the cover to form an AC magnetic loop according to the direction of the AC current to magnetize the diaphragm; A guide portion located inside the coil, the guide portion for guiding the guide; And a diaphragm which is guided by the guide portion and is located inside the coil, is magnetized by an alternating magnetic flux loop formed in the coil, and vibrates according to attraction or repulsion force with the permanent magnet.

According to another aspect of the present invention, there is provided an ultrathin loudspeaker comprising: a magnetic circuit loop made of a conductive material for focusing DC magnetic flux by first and second permanent magnets and AC magnetic flux by a coil on a metal diaphragm; A first cover portion for forming the first cover portion; A first permanent magnet embedded in the first cover portion to form a DC magnetic flux loop and to vibrate the metal diaphragm with an attractive force or a repulsive force with the metal diaphragm magnetized by the coil; A coil disposed on a side surface of the metal diaphragm to form an alternating magnetic flux loop to magnetize the metal diaphragm according to a direction of an applied AC current; First and second guide portions located inside the coil, the first and second guide portions being for guiding; Magnetically attracted by the alternating magnetic flux loops formed in accordance with the direction of the alternating current applied to the coil and having a magnetic property and an elastic material and being guided by the first and second guide portions and located inside the coil, The metal diaphragm vibrating according to an attractive force or a repulsive force with the first and second permanent magnets; The second permanent magnets incorporated in the second cover portion to form a DC magnetic flux loop to vibrate the metal diaphragm with an attractive force or a repulsive force with the metal diaphragm magnetized by the coil; And the second cover portion, which is made of a conductive material and forms a magnetic circuit loop for focusing DC magnetic flux by the first and second permanent magnets and AC magnetic flux by the coil on the metal diaphragm.

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According to another aspect of the present invention, there is provided an ultrathin loudspeaker comprising: a guide part for preventing leakage of DC magnetic flux and AC magnetic flux; A cover portion guided by the guide portion and focusing the direct current magnetic flux and the alternating magnetic flux to the diaphragm; A permanent magnet embedded in the cover portion to generate a direct current magnetic flux to form a direct current magnetic flux loop; A coil positioned inside the permanent magnet and forming an alternating magnetic flux loop on the upper and lower portions of the diaphragm to increase or decrease the magnetic flux amount by interaction with the direct magnetic flux; And the diaphragm interlocked with the permanent magnet and the coil to vibrate up and down in accordance with the amount of magnetic flux at the upper and lower portions due to the interaction between the direct magnetic flux and the alternating magnetic flux.

According to another aspect of the present invention, there is provided an ultrathin loudspeaker comprising: a first guide part made of a non-conductive material and preventing leakage of a DC magnetic flux and an AC magnetic flux; A magnetic circuit loop which is made of a conductive material and is guided by the first guide portion and which directs the direct magnetic flux by the first and second permanent magnets and the magnetic flux by the first and second coils to the metal diaphragm, 1 cover part; The first permanent magnet embedded in the first cover portion to generate a direct current magnetic flux to form a direct current magnetic flux loop; The first coil being located inside the first permanent magnet and forming an alternating magnetic flux loop in a lower portion of the metal diaphragm to increase or decrease the magnetic flux amount by interaction with the direct magnetic flux; The second coil being located inside the second permanent magnet and forming an alternating magnetic flux loop on the metal diaphragm to increase or decrease the magnetic flux amount by interaction with the direct magnetic flux; The second permanent magnet embedded in the second cover portion to generate a direct current magnetic flux to form a direct current magnetic flux loop; A magnetic circuit loop which is made of a conductive material and is guided by the second guide portion to converge a direct current magnetic flux by the first and second permanent magnets and an alternating magnetic flux by the first and second coils to the metal vibrating plate The second cover portion; The second guide part being made of a non-conductive material and preventing leakage of the DC magnetic flux and the AC magnetic flux; And the metal diaphragm having self-investment property and elastic material, which vibrates up and down according to the amount of magnetic force of the upper and lower parts in cooperation with the first and second permanent magnets and the first and second coils.

The conventional moving coil type speaker has a limitation in reducing the thickness of the speaker by arranging the vibrating part and the driving part up and down. However, according to the embodiment of the present invention, by disposing the driving part on the side surface of the vibrating part, And the thickness of the metal housing is minimized, so that the speaker can be realized in an ultra-thin shape.

In addition, in the conventional moving coil type speaker, split vibrations in which the diaphragm portion bonded to the voice coil and the diaphragm portion not bonded to the voice coil are different from each other are generated, so that the sound quality in the high frequency band is lowered and the acoustic output is lowered. According to the embodiment of the present invention, the DC magnetic flux and the AC magnetic flux are uniformly distributed throughout the vibrating portion (the diaphragm and the surround or the diaphragm) to transmit the driving force uniformly to the entire surface of the vibrating portion, The output efficiency can be improved.

In addition, since the conventional moving coil type speaker has a structure in which the voice coil and the diaphragm move together, the weight of the vibration part increases, so that the sound reproduction in the high frequency band is limited and the overall sound output efficiency of the speaker is reduced. , It is possible to increase the sound reproduction in the high frequency band and to improve the overall sound output efficiency of the speaker by separating the coil which occupies a large amount of weight from the vibration section and vibrate only the vibration section.

Also, in the conventional moving coil type speaker, in order to apply a current to the voice coil, the gold wire connected to the terminal is connected to the coil bonding portion of the diaphragm, so that when the vibrating plate vibrates up and down, However, according to the embodiment of the present invention, it is possible to prevent the vibration of the vibrating part from affecting the coil by separating the coil from the vibrating part. And it does not cause contact noise and split vibration because there is no gold diagonal structure.

In addition, in the conventional moving coil type speaker, the voice coil is located in a narrow space between the magnetic gaps, so that the heat emission is limited, and the input to be allowed is limited. However, according to the embodiment of the present invention, Since the metal housing (upper and lower cover) is brought into contact with the surface, it is possible to efficiently emit heat, thereby improving durability.

Further, according to the embodiment of the present invention, it is possible to simplify the assembling process by simplifying the structure of the loudspeaker, to facilitate the mass production of automation, and to reduce the manufacturing defective factor.

In addition, according to the embodiment of the present invention, it can be applied to electronic apparatuses of various sizes such as ultra-thin TVs and portable multimedia devices.

1 is a structural view of an embodiment of a general moving coil type speaker,
Fig. 2 is a structural diagram of a typical balanced amateur speaker. Fig.
FIG. 3 is a structural view of a general flat type magnet speaker,
4 is a structural view of an ultra-thin speaker according to an embodiment of the present invention.
5 is an exploded perspective view of an ultrathin loudspeaker according to an embodiment of the present invention,
6A is a view for explaining a DC magnetic flux loop in an ultra-thin speaker according to an embodiment of the present invention,
6B is a view for explaining an alternating magnetic flux loop in an ultrathin loudspeaker according to an embodiment of the present invention,
FIG. 7 is a detailed view of a metal diaphragm according to an embodiment of the present invention. FIG.
8A is an example of a corrugated surround portion and a metal diaphragm according to an embodiment of the present invention,
FIG. 8B is a structural view of an ultra-thin speaker when a pleated surround unit according to an embodiment of the present invention is applied;
9A is an example of a vibration part according to an embodiment of the present invention,
FIG. 9B is a structural view of the ultra-thin speaker according to FIG.
10 is a structural view of an ultra-thin speaker according to another embodiment of the present invention.
11 is an exploded perspective view of an ultrathin loudspeaker according to another embodiment of the present invention,
12A and 12B are views for explaining an alternating magnetic flux loop in an ultrathin loudspeaker according to another embodiment of the present invention,
13A and 13B are views for explaining the operation principle of an ultra-thin speaker according to another embodiment of the present invention,
14A to 14C are views showing a general method of manufacturing a speaker,
15 is an explanatory view of a method of manufacturing an ultra-thin speaker according to an embodiment of the present invention.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. .

And throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between. Also, when a component is referred to as " comprising "or" comprising ", it does not exclude other components unless specifically stated to the contrary . In addition, in the description of the entire specification, it should be understood that the description of some elements in a singular form does not limit the present invention, and that a plurality of the constituent elements may be formed.

First, in order to facilitate understanding of the embodiment of the present invention, the technical point of the ultra-thin speaker according to the embodiment of the present invention will be summarized as follows.

First, the driving unit (coil) is disposed on the side of the vibrating unit (the diaphragm, the surround or the diaphragm), so that the speaker can be realized in a very thin form. In other words, the conventional moving coil type speaker has a limitation in reducing the thickness of the speaker because the vibrating part (diaphragm) and the driving part (permanent magnet and voice coil) are vertically disposed. However, in the embodiment of the present invention, (The diaphragm and the surround or the diaphragm), the overall thickness of the speaker can be minimized by the displacement of the diaphragm and the thickness of the metal housing.

Second, it is possible to suppress the divided vibration by uniformly driving the entire surface of the vibration portion by using the direct current flux and the alternating magnetic flux. In other words, in the conventional moving coil type speaker, divided vibrations in which the diaphragm portion bonded to the voice coil and the diaphragm portion not bonded to the voice coil are different from each other are generated, so that the sound quality in the high frequency band is lowered and the acoustic output is lowered. In the embodiment of the present invention, the DC magnetic flux and the AC magnetic flux are uniformly distributed throughout the vibrating portion (the diaphragm and the surround or the diaphragm) so that the driving force is uniformly transmitted to the entire surface of the vibrating portion, The efficiency can be improved.

Third, the weight of the vibrating part can be minimized by separating the coil from the vibrating part. In other words, since the conventional moving coil type speaker has a structure in which the voice coil and the diaphragm move together, the weight of the vibration part increases, so that the sound reproduction of the high frequency band is limited and the overall sound output efficiency of the speaker is reduced. In the example, by separating the coil, which takes up a lot of weight, from the vibrating part and vibrating only the vibrating part, it is possible to expand the sound reproduction in the high frequency band and improve the overall sound output efficiency of the speaker.

Fourth, by separating the coil from the vibrating part, it is possible to prevent the vibration of the vibrating part from affecting the coil. In other words, in a conventional moving coil type speaker, in order to apply a current to the voice coil, a gold wire connected to a terminal is connected to a coil bonding portion of the diaphragm, so that when the diaphragm vibrates vertically, the coil bonding portion weakens, And the vibration of the diaphragm is not smooth due to the coil joining portion, which causes the divided vibration. However, in the embodiment of the present invention, the vibration of the vibration portion can be prevented from being affected by the coil by separating the coil from the vibration portion , It does not cause contact noise and split vibration because there is no gold slip structure.

Fifth, in the conventional moving coil type speaker, there is a problem that the voice coil is positioned in a narrow space between the magnetic gaps so that the heat emission is restricted and the input to which the voice coil is allowed is limited. In the embodiment of the present invention, (Upper and lower covers, for example, upper and lower surfaces, upper and lower surfaces and inner surfaces) are brought into contact with each other, so that efficient heat dissipation is possible and durability can be improved accordingly.

Sixth, in the embodiment of the present invention, the assembly process can be simplified by simplifying the structure of the speaker, the mass production of automation is easy, and the manufacturing defect factor can be reduced.

4 is a structural view of an ultrathin loudspeaker according to an embodiment of the present invention, and is a sectional view showing a sectional shape of an ultrathin loudspeaker.

First, the cover portion is made of a conductive material and forms a magnetic circuit loop that focuses the DC magnetic flux by the first and second permanent magnets 402 and 408 and the AC magnetic flux by the coil 403 on the metal diaphragm 405. At this time, the cover part may be composed of the first cover part 401 and the second cover part 409 in the upper and lower sides.

The permanent magnet forms a DC flux loop and vibrates the metal diaphragm 405 upward and downward with gravity or repulsive force with the metal diaphragm 405 magnetized to N pole or S pole by the coil 403. [ . At this time, the permanent magnet may be composed of first and second permanent magnets 402 and 408.

When the AC current is applied, the coil 403 forms an AC flux loop according to the current direction to magnetize the metal diaphragm 405 to the N pole or the S pole.

The guide portion serves to guide the metal diaphragm 405 and the like. At this time, the guide unit may include upper and lower first guide units 404 and second guide units 407.

The metal diaphragm 405 is magnetized into an N pole or an S pole by an alternating magnetic flux loop formed in accordance with the direction of the alternating current applied to the coil 403, and the first and second permanent magnets 402 and 408 ) Depending on the pulling force or repulsive force.

The surround portion 406 is an additional component that returns the metal diaphragm 405 in the absence of an alternating magnetic flux and blocks air flow in the front and rear surfaces.

The ultrasonic speaker according to one embodiment of the present invention will now be described in more detail with reference to FIG.

5 is an exploded perspective view of an ultrathin loudspeaker according to an embodiment of the present invention, which is an exploded perspective view of each component of the ultrathin loudspeaker.

The first cover portion 501 is made of a conductive material such as a metal and is wound around the metal diaphragm 505 with a DC magnetic flux generated by the first and second permanent magnets 502 and 508 and an AC magnetic flux generated by the coil 503 To form a magnetic circuit loop. The first cover portion 501 is formed with an acoustic emission hole to discharge air on the front surface of the metal diaphragm to the outside. At this time, the first cover portion 501 may be a lower cover, for example, a conductive iron material such as SPCC (Steel Plate Cold Comerica).

The first permanent magnet 502 forms a DC flux loop and is attracted or repelled by the coil 503 to the metal diaphragm 505 magnetized to the N pole or the S pole, ) Up and down. At this time, the first permanent magnet 502 is disposed in the inner groove at the center position of the first cover portion 501. Here, the first permanent magnet 502 may be a lower magnet, for example, a neodymium permanent magnet.

And the coil 503 forms an AC flux loop. That is, when an alternating current is applied to the coil, the coil 503 forms an alternating magnetic flux loop according to the current direction to magnetize the metal diaphragm 505 to the N pole or the S pole, and the first and second permanent magnets So that the metal diaphragm 505 is oscillated up and down by the attraction force or the repulsive force with the magnets 502 and 508. At this time, the entire thickness of the speaker is minimized by the displacement of the metal diaphragm 505 and the thickness of the metal housing (upper and lower cover portions) by disposing the coil 503 on the side of the vibrating portion (the metal diaphragm and the surround portion or the metal diaphragm) . Further, the coil 503 is separated from the vibrating portion to minimize the weight of the vibrating portion, and the vibration of the vibrating portion is prevented from affecting the coil 503. Further, the metal housing (upper and lower covers) are brought into contact with a certain surface (e.g., upper and lower surfaces, or upper and lower surfaces) of the coil 503. Here, the coil (Coil) 503 may be implemented as a voice coil, for example, copper (Cu).

The first guide portion 504 serves to guide the metal diaphragm 505 and the like. At this time, the first guide portion 504 may be a lower guide, for example, a plastic material or the like.

The metal diaphragm 505 is magnetized to an N pole or an S pole by an alternating magnetic flux loop formed in accordance with the direction of an alternating current applied to the coil 503 so that the first and second permanent magnets 502 and 508 ) Depending on the pulling force or repulsive force. At this time, the metal diaphragm 505 is disposed at a central position between the first permanent magnet 502 and the second permanent magnet 508. Here, the metal diaphragm (Suspension) 505 is a diaphragm having a self-investment property, that is, a metal material having a high permeability (for example, a binary alloy of nickel and iron, for example, permalloy available under the trade name) Can be implemented. If the metal diaphragm 505 is formed of a metal diaphragm made of an elastic material, it is not necessary to provide the surround portion 506, which will be described later.

The surround unit 506 returns the metal diaphragm 505 when there is no magnetic flux generated by the coil 503, and blocks the air flow on the front and rear surfaces. At this time, the surround portion 506 is disposed on the metal diaphragm 505 between the first permanent magnet 502 and the second permanent magnet 508. Here, the surround part (Diaphragm) 506 is an additional component, for example, can be formed thinly using a polymer series such as PEEK (Polyetherether ketone).

The second guide portion 507 serves to guide the metal diaphragm 505 and the like. At this time, the second guide portion 507 is an upper guide, and may be formed of plastic material or the like.

The second permanent magnets 508 form a DC flux loop and are attracted or repelled by the coil 503 to the metal diaphragm 505 magnetized to the N pole or the S pole, ) Up and down. At this time, the second permanent magnet 508 is disposed in the inner groove at the center position of the second cover portion 509. Here, the second permanent magnet 508 is an upper magnet, for example, a neodymium permanent magnet.

The second cover portion 509 is made of a conductive material such as metal or the like so that the DC magnetic flux by the first and second permanent magnets 502 and 508 and the AC magnetic flux by the coil 503 are focused on the metal diaphragm 505 Thereby forming a magnetic circuit loop. The second cover portion 509 is formed with an acoustic emission hole to discharge air on the front surface of the metal diaphragm to the outside. At this time, the second cover part 509 is an upper cover, for example, a conductive iron material such as SPCC or the like.

As described above, in one embodiment of the present invention, the entire surface of the vibration portion is uniformly driven by using the direct-current magnetic flux and the alternating-current magnetic flux to suppress the divided vibration. In other words, the DC magnetic flux and the AC magnetic flux are uniformly distributed over the vibrating portion (the metal diaphragm and the surround portion or the metal diaphragm) to uniformly transmit the driving force to the entire surface of the vibrating portion, thereby enlarging the high frequency band and improving the acoustic output efficiency .

FIG. 6A is a view for explaining a DC magnetic flux loop in an ultra-thin speaker according to an embodiment of the present invention, and FIG. 6B is a view for explaining an AC magnetic flux loop in an ultra-thin speaker according to an embodiment of the present invention.

6A, when a DC magnetic flux is generated in the lower first permanent magnet 601, the DC magnetic flux flows through the metal diaphragm 602 to the upper second permanent magnet 603. The DC magnetic flux flowing from the upper second permanent magnet 603 passes through the lower metal housing (the upper and lower cover portions 604 and 605) 601 to form a DC magnetic flux loop. At this time, for example, the DC magnetic flux flowing out from the second permanent magnet 603 on the upper side is transmitted again through the path formed along the upper second cover portion 604 and the lower first cover portion 605, And flows into the lower first permanent magnet 601.

6B, when an AC magnetic flux is generated in the coil 611 as AC power is applied to the coil 611, the AC magnetic flux is generated in the metal housing (the first and second covers (612, 613), flows into the coil (611) along the path formed along the metal housing again via the metal diaphragm (614) formed between the metal housings, .

As a result, the metal diaphragm 614 is magnetized to the N-pole or S-pole according to the direction of the alternating current applied to the coil 611. Then, a force or a repulsive force is generated between the first and second permanent magnets 615 and 616 and the magnetized metal diaphragm 614 arranged vertically, causing the metal diaphragm 614 to vibrate up and down.

Here, the metal magnetic metal housing (the first and second cover portions 612 and 613 at the upper and lower portions) forms the closed loop of the magnetic flux loops so as to minimize the leakage magnetic flux, Can be maximized.

7 is a detailed diagram of a metal diaphragm according to an embodiment of the present invention.

As shown in FIG. 7, the metal diaphragm 701 may have a hole 702 formed therein. At this time, the holes 702 can be formed in various shapes in the metal diaphragm 701 according to the displacement and the reproduction frequency of the vibration system.

FIG. 8A is a view illustrating an example of a pleated surround unit and a metal diaphragm according to an embodiment of the present invention, and FIG. 8B is a structural view of an ultrathin speaker in which a pleated surround unit according to an embodiment of the present invention is applied.

As shown in FIG. 8A, the vibrating portion can be implemented using the corrugated surround portion 801 and the metal diaphragm 802. At this time, if the corrugated surround portion 801 is used, the restoring force of the metal diaphragm 802 can be increased.

As shown in FIG. 8B, the ultrathin loudspeaker when the pleated surround 801 is applied is different from the ultrathin loudspeaker described above with reference to FIGS. 4 to 6B only in the corrugated structure and arrangement of the pleated surround 801 And other structures and operations are the same as those described above, and will not be described here.

9A is an example of a vibrating part according to an embodiment of the present invention, and FIG. 9B is a structural view of an ultrathin loudspeaker according to FIG. 9A.

As described above, the vibrating portion can be realized by using the metal diaphragm and the surround portion. 9A, when the metal diaphragm 901 is embodied as a metal diaphragm made of an elastic material, the vibrating portion can be realized by only the metal diaphragm 901 without the surround portion. Here, the metal diaphragm 901 is preferably made of a high permeability material having elasticity.

As shown in FIG. 9B, the ultrathin loudspeaker in which the vibrating portion is realized by only the metal diaphragm 901 is different from the ultrathin loudspeaker described above in FIGS. 4 to 6B only in the structure having no surround portion. Are the same as those described above, and will not be described here.

FIG. 10 is a structural view of an ultra-thin speaker according to another embodiment of the present invention, showing a cross-sectional shape and a direct current magnetic flux loop of an ultra-thin speaker.

First, the guide portion is made of a material in which a flux loop is not formed so that the direct magnetic flux and the alternating magnetic flux do not flow (that is, the leakage of the direct magnetic flux and the alternating magnetic flux is prevented), and the first and second cover portions 102 , 109) and the like. At this time, the guide portion may include the first guide portion 101 and the second guide portion 110 of the upper and lower sides.

The cover portion is made of a conductive material such as a metal so that DC magnetic flux by the first and second permanent magnets 103 and 108 and AC magnetic flux by the first and second coils 104 and 107 are focused on the metal diaphragm 105 To form a magnetic circuit loop. At this time, the cover part may be composed of the first cover part 102 and the second cover part 109 of the upper and lower parts.

The permanent magnet generates a DC flux to form a DC flux loop. At this time, the permanent magnets may be composed of the upper and lower first permanent magnets 103 and the second permanent magnets 108.

The coil forms an AC flux loop at the top and bottom of the metal diaphragm 105 to increase or decrease the amount of flux due to interaction with the DC flux. At this time, the coil may be composed of the upper and lower first coils 104 and the second coils 107.

The metal diaphragm 105 vibrates up and down according to the amount of flux in the upper and lower portions (the upper and lower portions of the metal diaphragm) due to the interaction between the DC magnetic flux and the AC magnetic flux.

The surround portion 106 is an additional component, which restores the metal diaphragm 105 in the absence of an alternating magnetic flux and blocks air flow in the front and rear surfaces.

10, when a DC magnetic flux is generated in the upper second permanent magnet 108, the DC magnetic flux flows through the metal diaphragm 105 to the lower first permanent magnet 103. As shown in FIG. Then, the DC magnetic flux flowing out from the first permanent magnet 103 in the lower portion is applied to the first cover portion 102 (lower cover portion) made of a metal having low magnetic resistance, the metal diaphragm 105, Flows into the upper second permanent magnet 108 via the second cover portion 109 (upper cover portion), thereby forming a DC magnetic flux loop. At this time, the first and second guide portions (101, 110, upper and lower guide portions) on the outer side are implemented with a non-metallic material such as plastic material so that the direct magnetic flux and the alternating magnetic flux do not flow, (102, 109) are made of a metal material in which a DC magnetic flux flows well, and converge a DC magnetic flux inside.

A detailed embodiment of the ultrathin loudspeaker according to another embodiment of the present invention will be described in more detail with reference to FIG. 11, and other embodiments are the same as those in the above embodiment, do.

11 is an exploded perspective view of an ultrathin loudspeaker according to another embodiment of the present invention, which is an exploded perspective view of each component of the ultrathin loudspeaker.

First, the first guide part 111 is made of a material in which a flux loop is not formed so that the direct magnetic flux and the alternating magnetic flux do not flow (that is, the leakage of the direct magnetic flux and the alternating magnetic flux is prevented) And the like. At this time, the first guide unit 111 may be a lower guide, for example, a non-metallic material (non-conductive material) such as a plastic material in which a magnetic flux loop is not formed.

The first cover part 112 is made of a conductive material such as a metal so that the direct magnetic flux generated by the first and second permanent magnets 113 and 118 and the alternating magnetic flux generated by the first and second coils 114 and 117, Thereby forming a magnetic circuit loop for focusing on the diaphragm 115. The first cover portion 112 is formed with an acoustic emission hole to discharge the air on the front surface of the metal diaphragm to the outside. At this time, the first cover part 112 may be a lower cover, for example, a conductive iron material such as SPCC or the like.

The first permanent magnet 113 generates a DC magnetic flux to form a DC flux loop. In this case, the first permanent magnet 113 may be a lower magnet, for example, a Neodymium-based permanent magnet.

The first coil 114 forms an AC flux loop below the metal diaphragm 115 to increase or decrease the amount of flux due to interaction with the direct current flux. At this time, the first coil (Coil) 114 is a lower voice coil, and the constant surface is in contact with the first cover part 112 made of a metal, for example, copper (Cu).

The metal diaphragm 115 is made of a material having high magnetic permeability and vibrates up and down according to the amount of flux in the upper and lower portions (upper and lower portions of the metal diaphragm). Here, the metal diaphragm 115 may be a diaphragm of a metal material having a high magnetic permeability (for example, a binary alloy of nickel and iron, for example, Permalloy). When the metal diaphragm 115 is embodied as a metal diaphragm made of an elastic material, it is not necessary to provide the surround portion 116, which will be described later.

The surround unit 116 returns the metal diaphragm 115 when there is no magnetic flux generated by the first and second coils 114 and 117, and blocks the air flow on the front and rear surfaces. At this time, the diaphragm 116 is an additional component, for example, a polymer type such as PEEK (Polyetheretherketone) or the like.

The second coil 117 forms an AC flux loop at an upper portion of the metal diaphragm 115 to increase or decrease the amount of flux due to interaction with the DC flux. At this time, the second coil (Coil) 117 is an upper voice coil, and the constant surface of the voice coil is contacted with the second cover part 119 made of a metal, for example, copper (Cu).

The second permanent magnet 118 generates a DC magnetic flux to form a DC flux loop. At this time, the second permanent magnet 118 is an upper magnet, for example, a Neodymium-based permanent magnet.

The second cover portion 119 is made of a conductive material such as a metal so that the direct current magnetic flux generated by the first and second permanent magnets 113 and 118 and the alternating magnetic flux generated by the first and second coils 114, Thereby forming a magnetic circuit loop for focusing on the diaphragm 115. The second cover portion 119 is formed with an acoustic emission hole to discharge air from the front surface of the metal diaphragm to the outside. At this time, the second cover part 119 is an upper cover, for example, a conductive iron material such as SPCC.

The second guide part 120 is made of a material in which a flux loop is not formed so that the direct current magnetic flux and the AC magnetic flux do not flow and guides the second cover part 119 and the like. At this time, the second guide part 120 is an upper guide, and can be realized as a non-metallic material (non-conductive material) such as plastic material in which a magnetic flux loop is not formed.

12A and 12B are views for explaining an alternating magnetic flux loop in an ultrathin loudspeaker according to another embodiment of the present invention.

12A and 12B, the lower first coil 121 forms an AC flux loop below the metal diaphragm 122, and the upper second coil 123 forms an AC flux loop, An AC flux loop is formed on the diaphragm 122 to increase the amount of flux on the metal diaphragm 122 by interaction with the DC magnetic flux and to increase the amount of flux To reduce the amount of flux on the metal diaphragm 122 and to increase the amount of flux under the metal diaphragm 122 (see FIGS. 13A and 13B).

13A and 13B are views for explaining the operation principle of an ultra-thin speaker according to another embodiment of the present invention.

First, a DC magnetic flux loop is formed by the second permanent magnet 108 and the first permanent magnet 103 as described above with reference to FIG. As shown in FIGS. 13A and 13B, an AC flux loop is formed under the metal diaphragm 132 by the first coil 131, and an AC flux loop is formed by the second coil 133, An AC flux loop is formed at an upper portion of the rotor 132.

13A, when the AC flux loop on the metal diaphragm 132 is formed in the same direction as the DC magnetic flux loop, the amount of flux on the metal diaphragm 132 increases (+ And the AC flux loop under the metal diaphragm 132 is formed in the direction opposite to the DC magnetic flux loop, the amount of flux under the metal diaphragm 132 is reduced (-), The metal diaphragm 132 is moved in the upward direction where the amount of the flux is increased.

13B, when the AC flux loop on the metal diaphragm 132 is formed in a direction opposite to the DC magnetic flux loop, the amount of flux on the metal diaphragm 132 decreases (- And when the AC flux loop under the metal diaphragm 132 is formed in the same direction as the DC magnetic flux loop, the amount of flux under the metal diaphragm 132 increases (+), The metal diaphragm 132 is moved in the lower direction where the amount of the flux is increased.

14A to 14C are views showing a method of manufacturing a general speaker.

As shown in FIGS. 14A to 14C, after assembling the assembly parts in the separate first sub-process and the first sub-process, the assembly results in the first sub-process and the first sub- Since a plurality of assembly lines are required in a separate main process, the process is complicated and the product is vulnerable to drop due to a plurality of bonding processes.

15 is an explanatory view of a method of manufacturing an ultra-thin speaker according to an embodiment of the present invention.

First, an AC flux loop is formed in the first cover portion, which is made of a conductive material and forms a magnetic circuit loop that converges the DC magnetic flux and the AC flux to the metal diaphragm, according to the current direction when the AC current is applied Assemble a coil that magnetizes the metal diaphragm to N pole or S pole.

After assembling the coils, a DC flux loop is formed, and a first permanent magnet for vibrating the metal diaphragm up and down by a force or a repulsive force with a metal diaphragm magnetized to N pole or S pole by a coil is assembled do.

After assembling the first permanent magnet, a first guide portion serving as a guide for the metal diaphragm or the like is assembled.

After assembling the first guide portion, the magnetic flux is magnetized to the N pole or S pole by the alternating magnetic flux loop formed in accordance with the direction of the alternating current applied to the coil, and the attracting force or repulsive force between the first and second permanent magnets Assemble a metal diaphragm that vibrates up and down.

After the metal diaphragm is assembled, the metal diaphragm is returned when there is no alternating magnetic flux, and a surround part for blocking air flow on the front and rear surfaces is assembled.

After assembling the metal diaphragm or after assembling the surround part, a second guide part serving as a guide for the metal diaphragm or the like is assembled.

A DC flux loop is formed after the second guide portion is assembled and a second permanent magnet for oscillating the metal diaphragm up and down by attraction or repulsion between the metal diaphragm magnetized to the N pole or S pole by the coil, And a second cover part made of a conductive material and forming a magnetic circuit loop for focusing DC magnetic flux and AC magnetic flux on the metal diaphragm.

As described above, the ultra-thin loudspeaker according to the embodiment of the present invention can simplify the assembly process by simplifying the structure (can be manufactured in one process) By assembling, the product is strong against drop, and the manufacturing defective factor can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various permutations, modifications and variations are possible without departing from the spirit of the invention. Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

501: first cover part 502: first permanent magnet
503: coil 504: first guide part
505: metal diaphragm 506:
507: second guide portion 508: second permanent magnet
509: second cover portion

Claims (20)

In an ultra-thin speaker,
A cover portion for focusing the direct current flux and the alternating magnetic flux to the diaphragm;
A permanent magnet embedded in the cover portion to form a DC magnetic flux loop and to vibrate the diaphragm with an attractive force or a repulsive force with the diaphragm magnetized by the coil;
A coil embedded in a side surface of the cover to form an AC magnetic loop according to the direction of the AC current to magnetize the diaphragm;
A guide portion located inside the coil, the guide portion for guiding the guide; And
And a magnetic circuit which is guided by the guide portion and is located inside the coil and is magnetized by an alternating magnetic flux loop formed in the coil to oscillate in accordance with a pulling force or a repulsive force with the permanent magnet,
Lt; / RTI >
The method according to claim 1,
Wherein:
And an ultrasonic speaker disposed on a side surface of the diaphragm.
The method according to claim 1,
The cover portion
Ultra thin speaker made of conductive material.
In an ultra-thin speaker,
A guide portion for preventing leakage of the direct current magnetic flux and the alternating magnetic flux;
A cover portion guided by the guide portion and focusing the direct current magnetic flux and the alternating magnetic flux to the diaphragm;
A permanent magnet embedded in the cover portion to generate a direct current magnetic flux to form a direct current magnetic flux loop;
A coil positioned inside the permanent magnet and forming an alternating magnetic flux loop on the upper and lower portions of the diaphragm to increase or decrease the magnetic flux amount by interaction with the direct magnetic flux; And
And the diaphragm interlocked with the permanent magnet and the coil to vibrate up and down in accordance with the amount of magnetic flux of the upper and lower portions due to the interaction between the direct magnetic flux and the alternating magnetic flux,
Wherein:
Wherein the vibration plate is disposed separately from the vibration plate.
5. The method of claim 4,
Wherein:
A first coil for forming an AC magnetic loop at a lower portion of the diaphragm; and a second coil for forming an AC magnetic loop at an upper portion of the diaphragm, Wherein the magnetic flux amount of the lower portion of the diaphragm is decreased or the amount of magnetic force of the lower portion of the diaphragm is increased.
5. The method of claim 4,
Wherein the guide portion is made of a non-conductive material,
Wherein the cover portion is made of an electrically conductive material.
The method according to any one of claims 1 to 3, 5, and 6,
Wherein:
Wherein the vibration plate is disposed separately from the vibration plate.
7. The method according to any one of claims 1 to 6,
Wherein:
Wherein the surface of the cover is in contact with the cover portion of a metal material.
7. The method according to any one of claims 1 to 6,
The diaphragm includes:
An ultrathin loudspeaker, which is a metal diaphragm made of a metal material of self-investment property.
7. The method according to any one of claims 1 to 6,
A diaphragm disposed on the diaphragm to return the diaphragm when there is no AC magnetic flux,
Further comprising:
In an ultra-thin speaker,
A first cover part made of a conductive material and forming a magnetic circuit loop for focusing DC magnetic flux by the first and second permanent magnets and AC magnetic flux by the coil on the metal diaphragm;
A first permanent magnet embedded in the first cover portion to form a DC magnetic flux loop and to vibrate the metal diaphragm with an attractive force or a repulsive force with the metal diaphragm magnetized by the coil;
A coil disposed on a side surface of the metal diaphragm to form an alternating magnetic flux loop to magnetize the metal diaphragm according to a direction of an applied AC current;
First and second guide portions located inside the coil, the first and second guide portions being for guiding;
Magnetically attracted by the alternating magnetic flux loops formed in accordance with the direction of the alternating current applied to the coil and having a magnetic property and an elastic material and being guided by the first and second guide portions and located inside the coil, The metal diaphragm vibrating according to an attractive force or a repulsive force with the first and second permanent magnets;
The second permanent magnets incorporated in the second cover portion to form a DC magnetic flux loop to vibrate the metal diaphragm with an attractive force or a repulsive force with the metal diaphragm magnetized by the coil; And
And a magnetic circuit loop which is made of a conductive material and condenses the direct current magnetic flux by the first and second permanent magnets and the alternating magnetic flux by the coil on the metal vibrating plate,
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12. The method of claim 11,
Wherein:
And the first and second cover portions are separated from the metal diaphragm and contacted with the first and second cover portions.
In an ultra-thin speaker,
A first guide part made of a non-conductive material and preventing leakage of the direct current flux and the alternating magnetic flux;
A magnetic circuit loop which is made of a conductive material and is guided by the first guide portion and which directs the direct magnetic flux by the first and second permanent magnets and the magnetic flux by the first and second coils to the metal diaphragm, 1 cover part;
The first permanent magnet embedded in the first cover portion to generate a direct current magnetic flux to form a direct current magnetic flux loop;
The first coil being located inside the first permanent magnet and forming an alternating magnetic flux loop in a lower portion of the metal diaphragm to increase or decrease the magnetic flux amount by interaction with the direct magnetic flux;
The second coil being located inside the second permanent magnet and forming an alternating magnetic flux loop on the metal diaphragm to increase or decrease the magnetic flux amount by interaction with the direct magnetic flux;
The second permanent magnet embedded in the second cover portion to generate a direct current magnetic flux to form a direct current magnetic flux loop;
A magnetic circuit loop which is made of a conductive material and is guided by the second guide portion to converge a direct current magnetic flux by the first and second permanent magnets and an alternating magnetic flux by the first and second coils to the metal vibrating plate The second cover portion;
The second guide part being made of a non-conductive material and preventing leakage of the DC magnetic flux and the AC magnetic flux; And
The first and second permanent magnets and the first and second coils and having a magnetic permeability and an elastic material,
Lt; / RTI >
14. The method of claim 13,
Wherein the first and second coils are disposed separately from the metal diaphragm,
Wherein the first coil is in contact with the first cover part of a metal surface,
And the second coil is brought into contact with the second cover portion of a metal surface on a certain plane.
The method according to any one of claims 1 to 6 and 11 to 14,
The ultra-
And the entire surface of the diaphragm is uniformly driven by using a direct current flux and an alternating magnetic flux.
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