KR100676422B1 - A multi-way slim panel speaker system with multi-point drive - Google Patents

Abstract

According to the present invention, a wideband sound source can be reproduced by combining a second diaphragm vibrating by a driving force of a plurality of magnetic circuit parts connected exclusively to a bass and a plate, and a plurality of first diaphragms reproducing heavy sound by direct driving of a voice coil. Regarding the multi-way plate speaker system,

The present invention provides a plate-shaped speaker system comprising: an outer frame; A plurality of magnetic circuit parts disposed at regular intervals and including a yoke, a permanent magnet, and a plate; A plurality of first diaphragms for one-to-one correspondence with the plurality of magnetic circuit parts, and having a voice coil; And a second diaphragm having an edge thereof coupled to the outer frame through an external damper, and coupled to the magnetic circuit parts through internal dampers to reproduce a bass region by vibrations of the magnetic circuit parts. The second diaphragm is supported by the second diaphragm, and the second diaphragm is indirectly vibrated by the vibration of the magnetic circuit unit to reproduce the bass region.

Flat panel, panel, panel, speaker, system, diaphragm, voice coil, magnetic circuit, broadband

Description

A multi-way slim panel speaker system with multi-point drive}             

1 is a view showing a conventional flat speaker system.

2 illustrates a flat panel speaker system according to an exemplary embodiment of the present invention.

3 is a cross-sectional view illustrating a speaker unit used in a flat panel speaker system according to an embodiment of the present invention.

Figure 4 is a cross-sectional view showing a flat panel speaker system according to another embodiment of the present invention.

5 is a view for explaining a speaker unit used in a flat panel speaker system according to another embodiment of the present invention.

6 is a view showing the internal electrodes and patterns of the flat panel speaker system according to the present invention;

7A to 7C illustrate examples of connecting the multi-point driving unit in various forms using the internal electrodes of the flat panel speaker system according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: outer frame 12: second diaphragm

13: first diaphragm 14: external damper

15: Duct 16: Lower Case

17: upper case 18: magnetic circuit portion

19: power connector

The present invention relates to a multi-point driven multi-way slim flat speaker system, and more particularly, to a multi-point driven multi-way slim flat speaker system having a wider range of reproducing bandwidth by combining a plurality of vibrating bodies having independent sound reproduction capability. .

The conventional two-way speaker system has a form in which a plurality of speaker units having separate independent sound reproduction capabilities such as woofers and tweeters are coupled to a wooden cabinet box. In addition, the conventional speaker system allocates and supplies an AC electric signal source of different frequencies electrically separated from each other using a network which is a passive frequency filter.

Such a conventional two-way speaker system is relatively difficult to thin the outer size. Moreover, the conventional speaker system is unable to extend the entire sound range to be low bass when the size is below a certain size. In addition, the conventional speaker system must use a network because the loudspeaker unit for reproducing high-pitched sound is damaged when a large input electric signal is introduced.

Flat speakers are patented by New Transducers Limited, published under International Publication No. WO 1997/09846 (named Panel Loudspeaker). The configuration of the conventional flat speaker is shown in FIG.

The conventional flat speaker includes a rectangular frame 1 having a resilient damper, and the distributed mode sound emitting flat plate 2 is supported along the inner periphery of the damper. Transducer 4 is securely mounted on or within the plate at a predetermined location, indicated by dimensions X and Y, the coordinates of which position the bending wave to propagate into the plate, allowing the plate to resonate and radiate sound output. To this end, it is calculated in the manner as disclosed in the invention filed by New Transducers Limited.

The transducer 4 is driven by a signal amplifier 6, for example an audio amplifier, connected to the transducer by a conductor 5. The amplifier load and power requirements can be completely standard, similar to conventional conical speakers, with sensitivity of 86-88 dB / watt at room load. The amplifier load impedance is typically 6 ohms in resistance and 20 to 80 watts of processing power. In the case where the plate core and / or skin portion are metal, they serve to absorb heat, so that the processing power is improved because the transducer 4 can remove heat generated from the motor coil of the transducer.

However, in the conventional flat speaker as described above, the farther away from the transducer attachment portion, the more the distortion is caused by the plate resonance phenomenon, which is inherent resonance of the flat plate itself. As a result, the sound quality of the conventional flat panel speaker is not clear. Generally speaking, the distortion of the sound becomes larger as the plate gets bigger and tries to expand into the low range. Therefore, the conventional flat speaker has been mainly applied as a low-cost auxiliary speaker, the design of a total thickness less than 18 millimeters has a problem in fact difficult.

In addition, a multi-point drive type flat panel speaker has already been known, which has a plurality of coils and a magnetic circuit structure in which one diaphragm is operated. Therefore, the multi-point driven flat panel speaker is capable of expressing sound from a constant low range to a high high range, but the diaphragm is formed in a plate shape, and it is impossible to expand to a high range over a certain range due to the weight of the entire driving source and the diaphragm. Therefore, low-band bass and high-end high-pitched sounds should be supplemented by separate speakers to form a speaker system capable of full-band playback.

Therefore, the present invention is to solve the above problems of the prior art, the low-tone dedicated, plate-like and the second to the second vibration plate vibrating by the driving force of the plurality of magnetic circuit unit connected integrally by the direct drive of the voice coil to reproduce the mid to high sound It is an object of the present invention to provide a multi-way plate type speaker system capable of reproducing broadband sound sources by combining a plurality of first diaphragms.

The present invention for achieving the above object, the plate-shaped speaker system, the outer frame; A plurality of magnetic circuit parts disposed at regular intervals and including a yoke, a permanent magnet, and a plate; A plurality of first diaphragms for one-to-one correspondence with the plurality of magnetic circuit parts, and having a voice coil; And a second diaphragm having an edge thereof coupled to the outer frame through an external damper, and coupled to the magnetic circuit parts through internal dampers to reproduce a bass region by vibrations of the magnetic circuit parts. The second diaphragm is supported by the second diaphragm, and the second diaphragm is indirectly vibrated by the vibration of the magnetic circuit unit to reproduce the bass region.

Preferably, the inner damper is coupled to the outer side of the yoke of the magnetic circuit unit, the inner frame is integrally coupled to the inner damper, and the second diaphragm is coupled to the inner frame.

Preferably, an auxiliary external damper is attached to the lower portion of the external damper to prevent bass extinction.

Preferably, the outer frame, the outer damper, the second diaphragm, the inner frames, the inner dampers and the yoke are integrally manufactured through a single injection process.

Preferably, the second diaphragm has a plurality of spaces formed so that its cross section has a honeycomb shape.

Preferably, the second diaphragm is separately manufactured and its edge is coupled to an external damper formed integrally with the outer frame, and the cross section of the outer damper has a wave shape.

Preferably, the apparatus further includes signal supply means for supplying a signal to each of the voice coils, wherein the signal supply means has main signal supply lines disposed on both sides of the longitudinal direction, and provided inside the main signal supply line. The number of sub-signal supply lines divided by the number of magnetic circuit units is provided, and the connection line of the voice coil is coupled to the divided sub-signal supply lines, and a part of the sub-signal supply lines is coupled to the main signal supply line. Thus, the voice coils can be connected in series or in parallel.

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

2 is a view showing a flat panel speaker system according to an embodiment of the present invention, Figure 3 is a cross-sectional view for explaining a speaker unit used in the flat panel speaker system according to an embodiment of the present invention. (A) is a partial cutaway front view, (b) is sectional drawing of a longitudinal direction.

In the flat panel speaker system according to the present invention, a plurality of magnetic circuit units 18 are arranged at regular intervals as shown in FIG. In addition, the magnetic circuit unit 18 is integrally coupled to the second diaphragm 12 for bass reproduction through an internal damper. The edge of the second diaphragm 12 is supported on the outer frame 11 by an outer damper 14. Here, the inner damper and the outer damper have elastic force.

On the other hand, the upper side of the magnetic circuit portion 18 is coupled to the first diaphragm 13 for high-pitched reproduction, the voice coil is attached to the first diaphragm 13. Accordingly, the first diaphragm 13 vibrates by the action of the voice coil and the magnetic circuit unit 18, and the second diaphragm 12 vibrates by the vibration of the magnetic circuit unit 18.

In the figure, reference numeral 15 denotes a reflection sound induction duct, 16 denotes a lower case, and 17 denotes an upper case. And reference numeral 19 is a power supply line for supplying power to each voice coil. A detailed configuration of the power supply structure will be described later with reference to FIG. 6.

A detailed configuration of a speaker unit used in the multi-point driving flat speaker system will be described with reference to FIG. 3.

As shown in FIG. 3, the speaker unit includes one magnetic circuit unit 18. The magnetic circuit unit 18 includes a yoke 25, a permanent magnet 26 provided in the yoke 25, and a plate 27 located above the permanent magnet 26, similar to a general magnetic circuit unit.

Above the magnetic circuit unit 18, a first diaphragm 28 for reproducing high sound is provided. The first diaphragm 28 may be coupled to a secondary suspension 29 as presented in PCT / KR2003 / 001755 (named invention: microspeaker with dual suspension) previously filed by the inventor. The voice coil 31 is attached to the lower portion of the first diaphragm 28. The first damper 30 extends to the end of the first diaphragm 28 and is integrally coupled to the end of the first diaphragm 28. The first damper 30 is fixed to the inner frame 23.

The structure and operation of the magnetic circuit unit 18, the first diaphragm 28, the voice coil 30, the secondary suspension 29 and the first damper 30 are described in PCT / KR2003 / 001755. Since it is described in detail, the description thereof is omitted here. Of course, in the present invention, the magnetic circuit portion, the first diaphragm, the voice coil, and the first damper may be configured in the same manner as a conventional micro speaker.

The biggest feature of the present invention is that the second diaphragm 12 for bass reproduction is coupled to the yoke 25 of the magnetic circuit section 18. Accordingly, the second diaphragm 12 reproduces the bass region by the vibration of the magnetic circuit unit 18.

The inner frame 23 is provided at a predetermined interval outside the yoke 25 of the magnetic circuit unit 18. The yoke 25 and the inner frame 23 are integrally connected by an inner damper 24. In addition, a second diaphragm 12 for reproducing the bass region is extended outwardly and integrally coupled to the inner frame 23. An edge of the second diaphragm 12 is fixedly coupled to the outer frame 11, wherein the second diaphragm 12 and the outer frame 11 are coupled by an outer damper 14. An auxiliary external damper 21 may be coupled to the lower portion of the external damper 14 to prevent bass cancellation.

The lower case 16 for securing the speaker is fixedly coupled to the lower end of the outer frame 11. The lower case 16 may be provided with an electrode terminal for power input. Reference numeral 22 in FIG. 3 denotes a main signal supply line for supplying a signal to each speaker unit. A connection line for supplying a signal to the voice coil 31 is coupled to the main signal supply line 22.

In the present invention, the outer frame 11, the outer damper 14, the second diaphragm 12, the inner frame 23, the inner damper 24, and the yoke 25 perform one injection process. Can be made integrally through. Therefore, the outer frame 11, the outer damper 14, the second diaphragm 12, the inner frame 23, the inner damper 24 and the yoke 25 are made of a polymer material.

In the present invention as described above, the second diaphragm 12 is indirectly vibrated by the vibration of the magnetic circuit part 18, and thus the weight of the magnetic circuit part 18, the thickness of the second diaphragm 12, and the like should be considered.

In the present invention, the resonance frequency supplied to the first diaphragm 13 is proportional to the rigidity of the damper 30, that is, the stiffness, based on the vibration force of the voice coil, and the effective mass of the first diaphragm and the voice coil. It is determined by the principle that it is inversely proportional to the equivalent mass, which is the sum of the mass of, and the mass of the reaction by the reaction of air and the mass of other adhesives. In addition, the resonant frequency of the magnetic circuit unit 18 and the internal damper 24 supporting it, the external damper 14, the rigidity of the auxiliary external dampers 21 for the purpose of restricting the access of air, that is, the second diaphragm 12 The sum of the total stiffness of the supporting dampers 24, 14, and 21 and the total weight of the second diaphragm including the added mass by the reaction of air corresponding to the effective vibration area of the second diaphragm Is considered and determined.

In this case, the internal first diaphragm 13 having a lower relative mass and the second second diaphragm 12 having a higher relative mass express different resonance regions, and as a result, this phenomenon occurs in one channel and at the same time. It allows for the reproduction of sounds of different separate frequencies. That is, in the present invention, the second diaphragm is coupled to the plurality of magnetic circuit units 18 arranged at regular intervals through an internal damper, and the second diaphragm indirectly receives the driving force of the magnetic circuit units to reproduce the bass region. In addition, a first diaphragm having a number of voice coils corresponding to a plurality of magnetic circuit parts 18 arranged at regular intervals is provided on the upper side of the magnetic circuit part, and the first diaphragm is operated by the action of the magnetic circuit part and the voice coil. It will vibrate directly. Accordingly, the present invention can reproduce the sound of another band at the same time without using a frequency separation circuit. Furthermore, since the resonant frequency varies depending on the weight of the magnetic circuit portion, sound reproduction of various bands is possible when the weight of each magnetic circuit portion is properly adjusted.

Referring to FIG. 3, the first diaphragm is formed at an appropriate angle, and can be reproduced up to a high-pitched region above the resonance frequency. In the case of the second diaphragm dedicated to bass reproduction, the first diaphragm is planar. It can only play up to the higher frequency. Therefore, the second diaphragm dedicated to the low tone is reproduced from the low tone region to the middle portion of the predetermined portion, and the first diaphragm dedicated to the medium and high tone is reproduced from the middle portion to the high tone region of the predetermined portion.

4 is a cross-sectional view showing a flat panel speaker system according to another embodiment of the present invention, and FIG. 5 is a view for explaining a speaker unit used in the flat panel speaker system according to another embodiment of the present invention.

The biggest feature of another embodiment of the present invention is that the second diaphragm employs a diaphragm having a honeycomb cross-sectional structure that is separately configured to realize lower legibility and linearity of the bass region.

As shown in FIG. 5, the second diaphragm 41 is manufactured by forming a plurality of spaces 43 so that the cross section has a honeycomb shape. Since the second diaphragm 41 cannot be injection molded integrally with the inner and outer frames like the diaphragm of FIG. 2, the second diaphragm 41 is separately manufactured. In this case, the external damper 42 for fixing the second diaphragm to the outer frame 11 may have a cross-sectional shape in the form of a wave in which a plurality of semicircles are combined. On the other hand, the edge of the second diaphragm 41 is coupled to the outer damper 42, and fixedly coupled to the upper side of the inner frame integrally connected to each magnetic circuit in the vicinity of the magnetic circuit portion.

In another embodiment of the present invention, the yoke 25, the inner damper 24 and the inner frame 23 are integrally manufactured through one injection process, and the outer frame 11 and the outer damper 42 are integrally formed. Is produced by. The second diaphragm 41 is manufactured separately and coupled to the external damper 42 and the inner frame 23 as described above. The rest of the configuration is the same as the embodiment of the present invention described with reference to FIG.

6 is a view showing the internal electrode and the pattern of the flat panel speaker system according to the present invention.

In the present invention, the structure for supplying power to the voice coil arranges the main signal supply lines 50a and 50b on both sides in the longitudinal direction of the speaker system. Protrusions 52 are formed in the central portions of the main signal supply lines 50a and 50b, and recesses are formed at the ends of the protrusions 52 to facilitate soldering. In addition, a number of sub-signal supply lines 51a, 51b, and 51c divided by the number of magnetic circuit units provided in the main signal supply lines 50a and 50b are provided. The neighboring sub-signal supply line located at the center is preferably integrally connected, and is formed so as to be solderable with the protrusion end formed at the center of the main signal supply line. The sub-signal supply lines 51a respectively positioned on the upper side and the lower side are formed with convex portions 53 for soldering connection with the main signal supply line, and correspondingly, recesses are formed in the main signal supply line.

7A to 7C illustrate examples of connecting the multi-point driving unit in various forms using the internal electrodes of the flat panel speaker system according to the present invention.

The circled portion in the drawing is the portion connected by soldering. As shown in the drawing, a plurality of speaker units may be connected in series, in parallel, or in series or parallel, depending on which part is soldered.

On the other hand, the speaker system according to the present invention can be manufactured in various forms, such as circular, oval, square, if necessary. In addition, the present invention has been described that the inner frame is coupled to the inner damper, and the second diaphragm is fixedly coupled to the inner frame, which may be directly coupled to the inner damper.

Such modifications will be apparent to those skilled in the art using the technical idea of the present invention, and therefore, the scope of the present invention should be determined by the contents of the claims rather than by the above description.

In the present invention as described above, a plurality of magnetic circuit units are arranged at regular intervals, the first diaphragm for high sound reproduction is installed to correspond to the magnetic circuit unit one-to-one, and the second diaphragm for low tone reproduction is provided with a damper in the magnetic circuit unit. By connecting via a single signal channel, a wide-band sound source can be reproduced, and the overall height is greatly reduced, making it possible to manufacture an ultra thin and ultra loud speaker system. In addition, the present invention can reduce the number of parts to be assembled can reduce the number of processes according to the manufacturing, it is possible to reduce the use of the adhesive to satisfy the environmental needs.

Claims (7)

In the plate speaker system, Outer frame; A plurality of magnetic circuit parts disposed at regular intervals and including a yoke, a permanent magnet, and a plate; A plurality of first diaphragms for one-to-one correspondence with the plurality of magnetic circuit parts, and having a voice coil; And An edge thereof is coupled to the outer frame through an external damper, and the magnetic circuit portions include a second diaphragm coupled to internal dampers to reproduce a bass region by vibrations of the magnetic circuit portions. And the magnetic circuit part is supported by the second diaphragm, and the second diaphragm vibrates indirectly by the vibration of the magnetic circuit part to reproduce a bass region. The method of claim 1, The inner damper is coupled to the outer side of the yoke of the magnetic circuit portion, the inner frame is integrally coupled to the inner damper, and the second diaphragm is coupled to the inner frame. The method according to claim 1 or 2, A flat speaker system, characterized in that the auxiliary damper is attached to the lower portion of the external damper to prevent the disappearance of bass. The method of claim 2, And the outer frame, the outer damper, the second diaphragm, the inner frames, the inner dampers and the yoke are integrally manufactured through a single injection process. The method of claim 2, The second diaphragm is a flat speaker system, characterized in that a plurality of spaces are formed so that the cross section has a honeycomb shape. The method of claim 5, The second diaphragm is manufactured separately, the edge of which is coupled to the external damper integrally formed in the outer frame, the flat speaker system, characterized in that the cross section of the external damper in the form of a wave. The method of claim 2, Signal supply means for supplying a signal to each of the voice coil further comprises a main signal supply line is disposed on both sides of the longitudinal direction, the magnetic circuit portion provided inside the main signal supply line A number of sub signal supply lines divided by a number are provided, and a connection line of the voice coil is coupled to the divided sub signal supply line, and a part of the sub signal supply lines are coupled to the main signal supply line, thereby providing the voice. Flat speaker system, characterized in that the coil can be connected in series or in parallel or in parallel.

Images