KR20100011199A - Rectangle and lmina type speaker - Google Patents

Abstract

PURPOSE: A rectangle type speaker is provided to induce uniform vibration of the dome body in reproducing sound by forming a recess on the dome body. CONSTITUTION: At least one voice coil drive settling portion(21) is formed in a frame(20). The voice coil drive(30) is settled in the voice coil drive settling portion of the frame. A suspension(40) is connected to the voice coil in order to apply an acoustic signal with different polarities to both ends of the voice coil of the voice coil drive. A edge(50) of a ring shape is attached from the top of the suspension to the frame. A dome(61) is expanded to horizontal direction from the central part of the dome body(60). The dome body is attached to the center hole of edge.

Description

Rectangular Thin Film Speaker {RECTANGLE AND LMINA TYPE SPEAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker. The present invention relates to a rectangular thin-film speaker that enables to output even sound in a wide frequency band and to facilitate the extension of the speaker in the longitudinal direction.

In recent years, in large display devices such as LCD TVs, PDP TVs, and LCD monitors, not only the expansion of the size but also the slimming have proceeded remarkably. As the size and size of the display device increase, a rectangular speaker that is thin and attached to a narrow bottom of the display device to output a high-quality sound signal without compromising the aesthetics of the display device is required.

In accordance with this requirement, in the prior art, it is considered to implement an elliptic speaker by extending one axis length in a circular dome speaker, and FIG. 1 is provided with an elliptic dome according to this consideration. The schematic diagram of the speaker.

As shown in FIG. 1, the elliptical speakers 1 and 1a presented for a large display device have an ellipse-shaped dome (a) in which the length of the long axis is significantly larger than that of the short axis in FIG. 2), which is configured to vibrate the voice coil drive drive 3 with the voice coil.

However, in the case of the oval speaker 1 of FIG. 1 (a), the difference between the long axis and the short axis of the elliptical dome 2 is large, so that when the vibration is performed by one voice coil, the overall weight balancing of the dome 2 does not match. Therefore, when the dome 2 vibrates, uniform vibration does not occur in the entire dome 2, and there is a problem that distortion occurs in the reproduction sound.

In order to solve this problem, the elliptical speaker 1a of FIG. By reducing and vibrating to solve the problem of the elliptical speaker (1) of Figure 1 (a).

However, in the case of the elliptical speaker 1a having a plurality of voice coil drives 3 of FIG. 1 (b), the split vibration between the voice coils of each voice coil drive drive 3 and the dome of the elliptical shape ( 2) does not have a symmetry, so that the balance of the weight of each region is not corrected, so that a distortion phenomenon in the reproduction sound may still occur due to non-uniform vibration generated for each region of the dome 2.

FIG. 2 is a graph of sound output characteristics for each frequency band showing distortion of reproduction sound generated in an elliptical speaker having the structure of FIG. 1. FIG. 2 will be described in more detail with reference to FIG. 2. In other words, the sound reproduced by the elliptical speaker having the structure of FIG. I can see that.

That is, in the case of an elliptical speaker presented as a rectangular speaker of the prior art, since the vibration of the voice coil is not uniformly transmitted to the whole of the diaphragm by the rectangular shape of the diaphragm, the quality of the reproduced sound is remarkably deteriorated.

Therefore, the present invention is to solve the above-mentioned problems of the prior art, to prevent the non-uniform vibration of the dome in the elliptical speaker having the elliptical dome of the prior art to significantly improve the quality of the reproduction sound, and to increase the sound output It is an object of the present invention to provide a rectangular thin-film speaker that can easily perform the extension in the longitudinal direction.

According to an aspect of the present invention, there is provided a rectangular thin film speaker including: a frame in which at least one voice coil drive seat is formed; A voice coil drive seated on the voice coil drive mounting part of the frame; The upper part of the voice coil drive is formed to have a symmetrical structure divided into upper and lower suspensions to which acoustic signals of different polarities are applied, so that both ends of the voice coils of the respective voice coil drives are attached to the upper and lower suspensions, respectively. A suspension seated on the frame; A ring shaped edge attached to the frame at the top of the suspension; And a dome body attached to a central perforation of the edge with a dome extending transversely from the center portion.

The dome body is formed by being inserted along the transverse direction at the central portion of the dome in order to improve the bearing capacity of the dome body, enhance the balancing characteristics, and efficiently receive the vibration of the voice coil. It further comprises a concave indentation attached to the surface.

Next, in the above-described configuration, the frame has a recess formed along the upper side of the frame side and is formed in a recess, and both side portions in the horizontal direction are formed with connection grooves disposed so that both suspension terminals of the suspension are exposed to the outside of the frame. A suspension seat; And at least one voice coil drive seating portion recessed to form a yoke on a bottom surface of the suspension terminal seating portion to seat the voice coil drive, respectively.

The frame further includes a suspension terminal seating portion protruding horizontally from the outer surface of the frame at the position of the connecting groove to provide a support force when extending the longitudinal direction of the rectangular speaker to seat the connection terminal of the suspension. It is characterized by.

And the suspension is cut in the center portion of the end of both sides is separated into the upper and lower outer ring, both ends of the upper and lower outer ring has a suspension terminal exposed to the outside of the frame through the connecting groove formed in the frame A rectangular outer ring made of a metal thin film material; An arc ring in which end portions of the voice coils are in contact with each other is formed at each position where the voice coil drive is seated, and a cutout is formed along a central portion to separate the upper inner ring and the lower inner ring, and the upper inner ring is the upper outer ring. To the ring, the lower inner ring is electrically connected to the outer ring, each of the upper semi-circular arc ring and the lower semi-circular arc ring separated in the circular ring is connected to each of the terminals of the conductive metal film material of the inner rectangular metal thin film It is characterized in that the upper suspension and the lower suspension is symmetrical with respect to the incision portion of the inner ring with a ring.

In addition, the suspension is characterized in that it further comprises a conductive connecting piece for interconnection of the suspension terminal.

In the rectangular thin film speaker of the present invention having the above-described configuration, a voice coil drive made of a permanent magnet, a plate, and a voice coil is vibrated to the voice coil drive mounting part of a frame, and all voice coils have current flowing in the same direction. Both terminals of the voice coil are connected to the upper and lower semicircular arc rings of the upper and lower suspensions so that the same vibration can be performed, and the suspension is seated on the suspension seat to vibrate according to the vertical vibration of the voice coil. Is seated, and the dome body is attached to a perforation formed in the center portion of the edge to form an integral rectangular thin film speaker. In this case, the upper and lower suspension terminals formed on both sides of the suspension are exposed to the outside of the frame through the connection grooves of the frames and are placed on the suspension terminal seating portions.

The rectangular thin film speaker of the present invention having the structure as described above separates and inputs a sound signal having different polarities into upper and lower suspensions through a suspension terminal seated on a suspension terminal seating portion formed outside the frame.

When sound signals with different polarities are input to the upper and lower suspensions, all voice coils connected to the upper and lower suspensions simultaneously flow currents corresponding to the polar directions of the upper and lower suspensions to generate magnetic fluxes corresponding to the acoustic signals. The magnetic flux interacts with the permanent magnet inside the voice coil drive to vibrate the voice coil up and down.

When the voice coil vibrates up and down, the edge and the dome body vibrate according to the vibration of the voice coil, so that a sound corresponding to the sound signal is reproduced and output.

At this time, the dome body is vibrated in the state that the concave portion formed in the center portion is attached to the voice coil, the vibration of the voice coil is transmitted directly to the dome body, the vibration of the voice coil is unevenly transmitted to the dome body as in the prior art This prevents distortion of the output sound. In addition, the recesses formed in the dome body provide a support force for uniformly supporting the entire dome body so that the entire region of the dome body vibrates uniformly, thereby further preventing distortion of the reproduced acoustic signal.

In addition, the rectangular thin film speaker of the present invention as described above is easy in the longitudinal direction by connecting a plurality of rectangular thin film speakers, which are integrally assembled, with the suspension terminals protruding to the outside of the frame by using the connecting pieces and the fasteners of the conductors. It is possible to easily improve the output of the rectangular thin-film speaker by making it easily expandable.

The rectangular thin-film speaker of the present invention that performs the above-described configuration and operation, by forming a recess in the dome body, the recess is uniformly supporting the dome body, so that the dome body vibrates uniformly during sound reproduction, as well as the lowest of the recess part. By attaching the part to the voice coil so that the vibration of the voice coil is directly transmitted to the dome body, the distortion of the reproduced sound is remarkably prevented during sound reproduction, thereby providing an effect of remarkably improving the output characteristics.

In addition, the rectangular thin film speaker of the present invention allows the rectangular thin film speaker to be easily extended in the longitudinal direction by connecting the suspension terminals exposed to the outside of the frame with the connecting pieces, thereby improving the sound output without degrading the quality of the reproduced sound. It provides an effect that can be easily increased.

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

Figure 3 is an exploded perspective view showing a rectangular thin-film speaker of the present invention provided in accordance with the requirements of the prior art as described above, Figure 4 is a plan view of the sustain of the present invention, Figure 5 is a perspective view of a dome body of the present invention. .

As shown in FIG. 3, the rectangular thin film speaker 100 according to an exemplary embodiment of the present invention has a frame 20 having a voice coil drive seat 21 and a suspension seat 22 disposed at a predetermined interval. And, the voice coil drive 30 seated in the voice coil drive seat 21 and the voice coil drive 30 supplies a sound signal for sound reproduction and vibrating the edge 50 and the dome body 60 Dome coupled to the suspension 40 seated on the suspension seating portion 22 and the rectangular perforation 51 at the center portion of the edge 50 and the edge 20 seated on the edge seating portion 23. It consists of a body (60).

3 to 5 will be described in more detail the configuration of the rectangular thin-film speaker 100 as follows.

First, in the configuration of the above-described rectangular thin film speaker 100, the frame 20 has a rectangular shape with a remarkably long horizontal direction, and the suspension seat 22 formed in the frame 20 has an edge at the upper surface of the frame 20. Concave indentation is formed along the side, and both side portions in the horizontal direction are formed with connecting grooves 24 cut from the uppermost surface of the frame 20 to the height of the upper surface of the suspension seating portion 22 to form upper and lower suspensions. Each of the suspension terminals 45 of the 40a and 40b is configured to be disposed to be exposed to the outside of the frame 20 through the connection groove 24. At this time, in the center portion of the connection groove 24, the separation protrusion 24a is formed to protrude so that the parts of the suspension 40 seated in the connection groove 24 are separated, and the frame in which the connection groove 24 is formed ( The outer surface of both sides of 20) has the same height as the upper surface height of the suspension seating portion 22 and protrudes in the horizontal direction and the screw holes 26 are formed at positions corresponding to the suspension connection terminals 45, respectively. Suspension terminal seating portion 25 is formed.

The voice coil drive 30 is a voice coil inserted into the outer circumference of the plate 32 and the permanent magnet 31 and the plate 32 positioned on the upper portion of the permanent magnet for focusing the permanent magnet 31 and the magnetic flux ( 33 is respectively mounted on the voice coil drive seat 21 formed in the frame 20.

The suspension 40 is made of a rectangular metal thin film material, and as shown in FIG. 4, in order to smoothly vibrate the vibration of the voice coil 33, the rectangular outer ring 21 and the rectangular inner side are formed. It is composed of a ring 22, the incision 44 is formed along the central portion in the transverse direction is configured to be separated up and down around the incision 44 to form the upper suspension (40a) and the lower suspension (40b).

The outer ring 41 is made of a conductive metal thin film that is cut at the center of both ends, and is exposed to the outside of the frame 20 through a connection groove 24 formed in the frame 20 at both ends. Suspension terminals 45, which receive electric signals and are connected to other upper and lower suspensions when necessary, are respectively formed. At this time, the suspension terminal 45 is formed to protrude from both sides of each of the upper outer ring constituting the upper suspension 40a and the lower outer ring constituting the lower suspension 40b as described below, and adjacent to the suspension terminal 45. The fastening hole 46 is coupled to the fasteners, such as screws for connecting the suspension terminal formed on the other upper suspension 40a and the lower suspension 40b of the rectangular thin film speaker 100.

Next, the inner ring 43 has a cutout 44 formed at the center in the transverse direction, and both ends of the voice coil 33 are connected to respective half arcs separated by the cutout 44, respectively. A circular ring 43 is formed at the position of the voice coil drive seat 21, and at both ends of the inner ring 42, the upper part forms an upper suspension 40a based on the cutout 44, and the lower part is To form the lower suspension 40b, the upper inner ring (the upper part of the cutout 44 of the inner ring 42) and the lower inner ring (the lower part of the cutout 44 of the inner ring 42) are respectively the upper outer side. The ring (upper part of the outer ring 41) and the lower inner ring (lower part of the outer ring 41) has a structure that is electrically connected.

The suspension 40 having the structure as described above is divided into upper and lower suspensions 40a and 40b so that the voice coil 33 vibrates by supplying sound signals of different poles to the voice coil 33. It is configured, but the suspension terminal 45 formed in each of the upper and lower outer ring of the outer ring 41 for storage to be connected to each other to be moved and stored integrally, and integrally assembled with the rectangular thin film speaker 100 The cutout 47 may be configured to be removed.

In addition, the suspension 40 having the structure as described above is preferably rounded so that both sides have an arc shape.

Next, the edge 50 has a shape of the outer periphery of the suspension seating portion 23, the center portion is formed with a perforated portion 51 perforated to have an outer circumferential shape outside the dome body 60, the edge 50 ) Has a structure in which a protruding portion extending along the ring body and protruding upward in a dome shape is formed. At this time, both sides of the edge 50 is rounded to have an arc shape, and both sides of the perforated portion 51 formed at the center of the edge 50 are preferably rounded to have the same radius of curvature.

Next, the dome body 60 is attached to the perforations 51 of the edge 50 by a bonding method or the like, and the cross section extends laterally in an arc shape at the center from a position having a predetermined distance from the edge. And a protruding dome 61 is formed. In addition, in the horizontal region of the central portion of the dome 61, the recess is formed to support the dome 61 with uniform tension so that the vibration of the voice coil 33 transmitted from the suspension 40 and the edge 50 can be uniformly transmitted. The lowermost part formed in the recess is formed by bonding at the contact point in the upper center direction of the voice coil 33 to form the recess 62 to allow the dome body 60 to receive the vibration of the voice coil 33 immediately. It has a structure. That is, the indentation portion 62 of the dome body 60 uniformly supports the dome body 60 to prevent non-uniform vibration in the dome body 60 itself as well as directly to the vibration of the voice coil 33. By transmitting to the body 60, the distortion of the reproduction sound is prevented as well as the sound reproduction efficiency is significantly improved.

The assembling state of each configuration of the rectangular thin film speaker as described above is as follows.

First, the voice coil drive 30 is seated on the voice coil drive seat 21 of the frame 20.

The suspension 40 is then welded so that the upper and lower half circular arc rings of each arc ring 43 are energized with each end of the voice coil 33 so that all the voice coils 33 flow in the same direction at all times. Or a conductive bond or the like. In this case, each of the suspension terminals 45 formed at both ends of the suspension 40 is exposed to the outside of the frame 20 through the connection groove 24 and is positioned at the suspension terminal seat 25.

As described above, after the suspension 40 is attached, the edge 50 is attached to the upper portion of the suspension 40 by bonding, and the dome body 60 is attached to the perforation portion of the edge 50 by being integrated. The rectangular thin film speaker 100 is assembled.

In addition, the rectangular thin film speaker 100 as described above is connected to each other in the longitudinal direction by the suspension terminal 45 protruding to the outside to facilitate size expansion in the direction.

FIG. 6 is a perspective view illustrating a longitudinal extension of the rectangular thin film speaker 100 integrally assembled as described above, and is formed at both sides of the rectangular thin film speaker 100 integrally assembled as shown in FIG. 6. The suspension terminal 45 exposed to the upper portion of the suspension terminal seating part 25 is connected to each other by using a fastener such as a conductive connecting piece 48 and a screw, and the suspensions formed inside the different rectangular thin film speakers 100 are different from each other. The upper suspension 40a of the 40 is connected such that the upper suspension 40a and the lower suspension 40b are the same polarity among the lower suspensions 40b.

Next, an operation process of the rectangular thin film speaker 100 of the present invention assembled as described above will be described.

As described above, in order to drive the rectangular thin film speaker 100 that is integrally assembled, the upper and lower suspensions 40a and 40b are formed of the sound signals through the suspension terminals 45 exposed to both sides of the frame 20. -The audio signal is input separately. Accordingly, each voice coil 33 connected to the upper and lower suspensions 40a and 40b simultaneously flows a current having the same direction according to the polarity of the upper and lower suspensions 40a and 40b. 21, all voice coils 33 vibrate at the same time according to the input sound signal, thereby causing the suspension 40, the edge 11 and the dome body 12 to vibrate and reproduce the sound signal as sound. do.

At this time, the concave portion 62 formed in the dome 61 of the dome body 60 during the sound output process as described above uniformly supports the entire dome body 60, as well as vibration of the voice coil 33 By directly transmitting to the dome body 60, it is possible to prevent the occurrence of distortion of the reproduction sound signal as in the prior art, and to significantly improve the sound reproduction effect.

Referring to Figures 2, 7 and 8 when comparing the output characteristics of the rectangular thin film speaker 100 of the present invention and the rectangular thin film speaker 100 of the prior art as follows.

FIG. 7 is a graph illustrating acoustic output characteristics of a rectangular thin film speaker according to an exemplary embodiment of the present invention to which a dome body 60 having recesses 62 is applied, and FIG. 8 illustrates output characteristics of FIGS. 2 and 7. Simultaneously shown, it is possible to grasp how the rectangular thin-film speaker of the present invention improves the sound output characteristics compared to the speaker of the prior art.

First, as shown in FIG. 8, when comparing FIG. 7 with FIG. 2, in the case of a rectangular speaker having an elliptical dome of the prior art, a significant acoustic distortion occurs at 2 KHz, as in the prior art, and is generally not flat. Does not show sound output characteristics.

However, as shown in FIG. 7, the output characteristics of the rectangular thin film speaker according to the exemplary embodiment of the present invention are substantially flat throughout the effective band, and unlike the conventional rectangular speaker, the output power of the acoustic output in the 2 KHz region is different. It can be seen that distortion does not occur.

In addition, the present invention has a configuration feature that can easily increase the sound output by facilitating the extension in the longitudinal direction. In more detail, the plurality of rectangular thin film speakers 100 connected to each other by the suspension terminals 45 exposed to both sides by the method described with reference to FIG. 6 are not connected to other rectangular thin film speakers 100 and both side ends. When the acoustic signal is applied to the exposed suspension terminal 45 at, the voice coils 33 provided in all the rectangular thin film speakers 100 vibrate in the same direction at the same time, so that the number of the rectangular speakers with the extended sound output length. It becomes significantly higher in proportion to. Therefore, the rectangular thin film speaker of the present invention can easily perform the size expansion of the speaker for improving the sound output.

1 is a schematic configuration diagram of a speaker having an elliptical dome according to this consideration;

FIG. 2 is a graph showing sound output characteristics of frequency bands showing distortion of reproduction sound generated in an elliptical speaker having the structure of FIG.

3 is an exploded perspective view showing a rectangular thin-film speaker of the present invention provided in accordance with the requirements of the prior art as described above;

4 is a plan view of the sustain of the present invention;

5 is a perspective view of a dome body according to the present invention;

6 is a perspective view of a rectangular thin-film speaker extended in the longitudinal direction,

7 is a graph showing sound output characteristics of a rectangular thin film speaker according to an embodiment of the present invention;

8 is a graph showing output characteristics of FIGS. 2 and 7 simultaneously.

Description of the main symbols in the drawings

100: rectangle thin film speaker

20: Frame 21: Voice coil drive seat

23: suspension seat 24: connecting groove

25: suspension terminal seat

30: Voice coil drive

40: suspension 41: outer ring

42: inner ring 43: circular arc ring

44: cutout 45: suspension terminal

50: edge

60: dome body 61: dome

62: recessed part

Claims (6)

A frame in which at least one voice coil drive seat is formed; A voice coil drive seated on the voice coil drive mounting part of the frame; A suspension connected to the voice coil such that acoustic signals having different polarities are applied to both ends of the voice coil of the voice coil drive; A ring-shaped edge attached to the frame on top of the suspension; And a dome body attached to a central perforation portion of the edge with a dome extending horizontally from the center portion. The rectangular thin-film speaker of claim 1, wherein the dome body is formed by being recessed along the transverse direction at the central portion of the dome, and has a recessed portion in which the lowermost surface is attached to an upper surface of the voice coil. The method of claim 1 or 2, wherein the frame, Suspension seating part is formed along the upper surface of the edge side of the frame and the recess is formed on the both sides of the transverse direction is formed with a connection groove is arranged so that both suspension terminals of the suspension is exposed to the outside of the frame; And at least one voice coil drive seating portion recessed to form a yoke at a bottom of the suspension terminal seating portion to seat the voice coil drive, respectively. The method of claim 1 or 2, wherein the frame, And a suspension terminal seating portion protruding in a horizontal direction from the outer surface of the frame at the position of the connection groove to provide a support force when extending the rectangular speaker in the longitudinal direction, to which the connection terminal of the suspension is seated. Rectangular thin film speaker. The method according to claim 1 or 2, wherein the suspension, A central outer ring which is cut at both ends and separated into upper and lower outer rings, and at both ends of the upper and lower outer rings, a rectangular outer ring having a metal film material having suspension terminals; An arc ring in which end portions of the voice coils are in contact with each other is formed at each position where the voice coil drive is seated, and a cutout is formed along a central portion to separate the upper inner ring and the lower inner ring, and the upper inner ring is the upper outer ring. To the ring, the lower inner ring is electrically connected to the outer ring, each of the upper semi-circular arc ring and the lower semi-circular arc ring separated in the circular ring is connected to each of the terminals of the conductive metal film material of the inner rectangular metal thin film With ring; Rectangle thin film speaker having a structure consisting of an upper suspension and a lower suspension symmetrical with respect to the incision portion of the inner ring. The rectangular thin-film speaker according to claim 5, wherein the suspension further comprises a conductive connecting piece for interconnecting the suspension terminals.

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