KR101625932B1 - A suspension for speaker and a speaker device using the same - Google Patents

Abstract

An object of the present invention is to provide a suspension for a speaker which prevents an allophone and has excellent audio characteristics in high and low frequency bands. The present invention relates to the suspension and a speaker to which the suspension is applied, wherein the suspension supports a vibration plate and a voice coil which are placed at the center of the speaker with a long shaft and a short shaft perpendicular to the long shaft and supplies power to the speaker. The suspension (130) is installed in the speaker in which a voice coil (140) is fixed in the central portion of the vibration plate (110) having the long shaft (L) and the short shaft (S). The suspension (130) is connected to the central portion to supply power to the voice coil and to provide attenuation force to the vibration plate. The suspension of the present invention includes: a fixing unit (131) fixed along a periphery of a frame (200) of the speaker; and a pair of cantilevers (132) extending toward the central portion while being connected inwardly to an inner periphery of a side fixing portion spaced apart from the central portion by a predetermined distance about the short shaft, wherein the pair of cantilevers are provided in one of first and second areas divided based on the short shaft.

Description

TECHNICAL FIELD [0001] The present invention relates to a suspension for a speaker device, and a speaker device using the suspension device.

The present invention relates to a suspension for a speaker device, more particularly, to a voice coil and a diaphragm located at a central portion of a diaphragm of a speaker device having a long axis and a short axis perpendicular thereto and a suspension for supplying power to the voice coil, And a mono coil speaker device using the same.

A speaker device, which is mainly used for a display device or an audio device, comprises a diaphragm assembly. The diaphragm assembly vibrates by the driving force applied to the diaphragm to generate a negative pressure. The speaker device uses the electromagnetic force induced in the coil as the driving force, the electrostatic speaker uses the electrostatic force acting on the diaphragm as the driving force, and the piezoelectric speaker changes the shape of the piezoelectric body to the driving force .

1 shows a conventional diaphragm assembly and a speaker device including the same. Speaker devices used for a display device, an audio device, and the like generally have a rectangular or track shape having a major axis and a minor axis perpendicular to the major axis. Such a speaker device is advantageous for mounting on a bezel located at the edge of the display device in terms of dimensions.

The diaphragm assembly of the speaker device is composed of a vibration surface (60), an edge (50), and a suspension (40).

The vibration surface 60 may be made of a material such as compressed pulp, paper, metal, polymer film, glass fiber, carbon fiber or the like and a convex stiffness reinforcing portion formed on the upper surface thereof to increase the area moment of inertia To reinforce the rigidity.

The edge 50 is made of an elastic material such as TPU (Thermal Polyurethane), rubber or the like, and is formed into an annular ring as a whole to surround the vibration surface and join with the edge of the vibration surface. A portion engaging with the vibration surface is formed on the inner peripheral edge of the annular ring shape, and a portion engaging with the fixed end such as the suspension 40 fixed on the frame or the frame of the speaker device is formed on the outer peripheral edge. A convex portion for reinforcing the elasticity of the edge structurally is formed between the vibration-surface-mating portion at the periphery and the fixed-end-mating portion at the outer periphery.

The suspension 40 functions to provide a damping force to the vibration surface 60 and is formed of a metal leaf spring. One side of the suspension 40 is attached to the bottom surface of the vibration surface 60 and the other side is attached to a fixed end, such as the frame 20 of the speaker device. In addition, the suspension is a conductive material and functions to supply a voltage applied from the outside to the voice coil attached to the vibration surface of the speaker device.

Since the rectangular speaker apparatus has a vibration distance that varies according to the vibration direction of the vibration surface, there is a problem that the acoustic characteristics of the speaker apparatus are structurally lowered compared with a speaker apparatus having a circular or square structure. Particularly, in the speaker device of a rectangular structure, since the vibration surface 60 is formed long in the major axis direction, divided vibrations are generated by the vibration mode in a specific frequency band. When the divided vibration is generated, vibrations having a phase difference of 180 deg. Between the specific region of the vibration surface 60 and the adjacent region cause destructive interference with each other, and a dip phenomenon in which the sound pressure remarkably drops at the frequency is inevitably generated . Such a dip phenomenon distorts the frequency response characteristic of the speaker device, and as a result, there is a problem that the output sound is distorted and the sound quality seriously deteriorates.

1, a plurality of magnetic circuits 31 and 32 and a voice coil 33 are connected to one vibration surface 60 at regular intervals to drive a speaker device . According to such a structure, the driving force of the vibration surface 60 acts dispersedly at two or more points, and therefore, the possibility of occurrence of divided vibration can be lowered. However, the structure of the conventional speaker device as shown in Fig. 1 using a plurality of magnetic circuits 31 and 32 and the voice coil 33 increases the number of parts, increases the cost of raw materials, The number of manufacturing processes is increased, so the unit productivity of the product is decreased and the defect rate is greatly increased. In addition, since an assembly error between a plurality of magnetic circuits and a voice coil must be considered, the manufacturing itself becomes complicated, and the manufacturing cost is inevitably increased.

In order to solve the problem of the divided vibration of the vibration surface 60 generated in such a conventional speaker device, the present invention has been invented and registered as a patent of a new concept (Patent No. 1560365). This new concept of diaphragm structure is very excellent in stiffness, so that it is possible to solve the problem of distortion of acoustic characteristics due to the resonance mode occurring at the resonance frequency of the diaphragm even if only one voice coil is used at the center.

In addition, the present invention has led to the patent registration of a diaphragm assembly having a novel structure that solves the dip phenomenon due to the divided vibration by greatly increasing the attenuation ability of the diaphragm in the speaker device (Patent No. 1564896). This is achieved by providing an extension portion extending and fixed to the fixed end from the edge of the long axis direction away from the center of the diaphragm to which one voice coil is fixed, thereby generating an additional damping force so as to suppress the divided vibration.

When two or more voice coils 33 are installed on the vibration surface 60 as shown in FIG. 1, the suspensions 40 connected to the end portions of the voice coil for supplying power to the voice coils are long And has a beam structure in which both ends are both fixed ends. That is, the voice coil 33 assembly coupled with the vibration surface 60 of FIG. 1 has four suspension legs 40 extended in two by two toward the edges of the major axis, Shape.

It is possible to adjust the position of the voice coil fixed to the vibration surface 60 in the speaker device having the long axis and the short axis orthogonal thereto in the speaker device provided with two or more voice coils as in the prior art. For example, when two voice coils are installed, the distance between the two voice coils can be appropriately selected while the two voice coils are installed at symmetrical positions with respect to the center point of the vibration surface 60. 1, one voice coil is placed at the center point of the vibration surface 60, and the remaining two are placed at positions where the two voice coils are symmetrical with respect to the center point of the vibration surface 60 . The position of the plurality of voice coils can be selected at a position where the divided vibration can be minimized, and the suspension is connected to the voice coil disposed at this position.

Since the voice coil is disposed at a position where the voice coil is appropriately dispersed in the speaker device structure in which two or more voice coils are provided so that the driving force is applied to at least two points, the suspension structure hardly affects the acoustic characteristics of the speaker device. That is, as a result of the inventor's investigation, it was found that the speaker apparatus having two voice coils has a point symmetrical structure with respect to the center of the speaker device, and even if the both ends of the suspension are fixed,

However, in the case of a speaker device having a long axis and a short axis orthogonal to the long axis and only one voice coil at the center, a problem arises in that the suspension is extended in the long axis direction and becomes a beam having a fixed stage structure at both ends . As a result of the experiment conducted by the inventor of the present invention, when a suspension having both fixed ends is connected long and one central load acts as a driving force, the symmetrical structure of the suspension becomes a repulsive structure in a low frequency band, There arises a problem that a noise is generated.

Published Patent Publication No. 2012-79306 Patent Registration No. 1074421 Korean Patent Registration No. 1560365 Patent Registration No. 1564896

It is an object of the present invention to provide a loudspeaker apparatus having a long axis and a short axis perpendicular to the long axis and having only one voice coil at the center, And it is an object of the present invention to provide a suspension for a speaker device having excellent characteristics.

In order to solve the above-described problems, the present invention provides a speaker device comprising a voice coil fixed to a center of a vibration surface of a speaker device having a long axis and a short axis orthogonal to the long axis, and a cantilever ) Type of suspension.

More specifically, the present invention is a speaker device in which a voice coil 140 is fixed to a center portion of a diaphragm 110 having a long axis L and a short axis S perpendicular thereto, and is connected to the center portion, A suspension (130) for supplying power and providing a damping force to the diaphragm, the suspension comprising: a fixing part (131) fixed along the frame (200) of the speaker device; And a pair of cantilevers (132) extending in the major axis direction toward the central part while being connected in a direction facing inward from the inner periphery of one of the fixed parts spaced from the center part by a predetermined distance on the basis of the minor axis And the pair of cantilevers are provided only in one of the first region and the second region which are divided with reference to the minor axis.

The pair of cantilevers may have a symmetrical shape with respect to the long axis (L).

The cantilever portion may be disposed outside the vibration surface of the diaphragm.

And a coil connection part 134, 134-1, 134-2 connected to the end of the cantilever part and fixed to the voice coil.

The end portion of the cantilever portion and the connection portion of the voice coil may be located outside the vibration surface.

The coil connection may have a shape corresponding to the shape of at least a portion of the coil.

The coil connection part may include a first coil connection part 134-1 disposed outside the vibration surface of the diaphragm.

The coil connection portion may include a second coil connection portion 134-2 disposed at a position overlapping the vibration surface of the diaphragm.

133-1, 133-2 connected to the ends of the cantilever portion and fixed to the diaphragm.

The vibrating-surface connecting portion may be connected to a coil connecting portion connected to an end of the cantilever portion and fixed to the voice coil.

The vibrating-surface connecting portion may be connected to the end of the cantilever portion via the coil connecting portion.

The vibrating-plane connecting portion of the suspension may be fixed to the bottom surface of the diaphragm, and the coil connecting portion may be fixed to the upper surface of the voice coil.

The vibrating-surface connecting portion may be disposed closer to the center (C) of the vibration surface than the coil connecting portion.

The vibration surface coupling part may include a first vibration surface connection part 133-1 extending in the major axis direction along the edge of the vibration plate.

The vibration surface coupling part may include a second vibration surface coupling part 133-2 extending in the major axis direction along the center of the vibration plate.

135, 135-1, 135-2 may be provided at a portion surrounded by the vibration surface connection portion and the coil connection portion.

And a coil connection terminal (136, 136-1, 136-2) connected to an end of the cantilever portion and to which a coil of the voice coil is electrically connected.

The coil connection terminal may have a shape in which a first vibration surface connection part connected to an end of the cantilever part and fixed to an edge of a vibration surface of the diaphragm extends further in the major axis direction.

The coil connecting terminal and the first vibrating surface connecting portion may be connected to each other with a boundary of the coil connecting portion fixed to the voice coil.

The present invention also provides a speaker device having the suspension.

According to the present invention, compared to the conventional suspension structure in which both ends are fixed ends, the possibility of occurrence of the vibration mode is significantly reduced by eliminating the repulsion structure, thereby preventing the occurrence of joints in the speaker device to which one voice coil is applied It can provide damping for the diaphragm and supply power to the center voice coil.

The cantilever portion can be arranged longer in the major axis direction than the vibration surface of the diaphragm so that the suspension can sufficiently attenuate the vibration of the vibration surface while avoiding interference between the vibration surface and the cantilever portion, The range in which the length of the cantilever portion can be designed so as to avoid the vibration mode is widened.

Also, since the vibrating-surface connecting portion and the coil connecting portion connected to the end of the cantilever portion are interposed between the bottom surface of the diaphragm and the upper surface of the coil, the diaphragm assembly can be firmly assembled.

In addition, since the vibrating-surface-connecting portion and the coil-connecting portion are connected to each other and the passage is provided in the portion surrounded by them, the mass of the suspension can be lowered and the adhesive for fixing the suspension to the diaphragm and the voice coil can be easily applied, Can be uniformly maintained.

In addition, since the connecting portion of the vibrating surface is disposed closer to the center of the vibrating plate than the coil connecting portion, the fixed area of the vibrating plate, the suspension, and the voice coil is concentrated on the inner portion of the voice coil, The effect can be minimized.

According to the present invention, since the coil connection terminal and the vibration surface connection portion are connected to the coil connection portion and are connected to each other in the longitudinal direction with the coil connection portion being connected to each other, even if the suspension is made of a thin member, It is possible to add the function of the vibrating-surface connecting portion.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is an exploded perspective view showing a conventional speaker device having a long axis and a short axis orthogonal thereto,
2 is an exploded perspective view of a speaker device to which a suspension according to an embodiment of the present invention is applied,
Figure 3 is a top view of the suspension of Figure 2,
FIGS. 4 to 10 are plan views respectively showing other embodiments of the suspension according to the present invention, and FIGS.
11 is an acoustic distortion curve according to the prior art in which the cantilever portion is provided only in the first region and the cantilever portion is provided in both the first region and the second region.

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

It is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to inform.

FIG. 2 is an exploded perspective view of a speaker device to which a suspension according to an embodiment of the present invention is applied, and FIG. 3 is a plan view of the suspension of FIG. The speaker device illustrated as an embodiment of the present invention includes a diaphragm assembly 110, 120, 130 including a diaphragm, an edge, and a suspension, a magnetic circuit assembly 140, 310, 320 including a voice coil, a plate, , 330, and a frame 200. [

The diaphragm 110 performs a function of generating negative pressure by vibration. The material of the diaphragm 110 is not particularly limited, and materials such as compressed pulp, paper, metal, polymer film, glass fiber, or carbon fiber can be used. The plane shape of the diaphragm 110 is not particularly limited and may be a plane shape such as a square, a circle, a rectangle, a track, an ellipse, and the like.

The vibration surface 112 of the diaphragm 110 has a convex portion having a highest center in the longitudinal direction of the major axis, a lowest point at both ends, and a gradually increasing height from the end to the center, and the central portion surrounded by the convex portion has a long axis The center portion is the lowest along the longitudinal direction, the both ends are the highest, and the concave portion gradually increases from the end portion to the center portion, so that the stiffness is very high, so that the split vibration can be suppressed as much as possible.

The vibration surface 112 of the diaphragm 110 is surrounded by the edge 120. The edge of the vibration surface is engaged with the inner circumferential surface of the edge 120 and the outer circumferential surface of the edge 120 is fixed on the periphery of the frame 200 or more precisely on the periphery of the frame. Lt; / RTI >

At both ends of the diaphragm 110 in the longitudinal direction, extension portions 114 are formed. The middle portion of the extended portion is convex downward and the outer peripheral portion of the extended portion is flattened. The outer circumferential portion of this extension is engaged on the periphery of the frame 200, more precisely on the suspension 130 which is fixed on the periphery of the frame. The frame 200, the suspension 140, the diaphragm 110, and the edge 120 are stacked in that order from the bottom to the top in the frame peripheral area on which the extension part 114 rests.

The cutout portion 116 is formed in the end portion of the long axis in the extension portion 114. The region where the long axis of the diaphragm 110 passes is not connected to the fixed end such as the frame due to the provision of the cutout portion, so that the phenomenon of the diaphragm swinging with the long axis as the rotation axis can be prevented.

One voice coil 140 is attached to the center of the bottom of the diaphragm assemblies 110, 120 and 130 and may be self-bonded and attached to the bottom of the diaphragm assemblies 110, 120 and 130, or may be attached to the bottom of the diaphragm assembly via the bobbin. In the embodiment of the present invention, the voice coil 140 may be interpreted to include a bobbin for convenience. The voice coil 140 may have a circular shape, a square shape, or a track shape, as shown in FIG. 2, depending on the shape of the magnetic circuit. The voice coil 140 may be coupled to (coupled to) the coil connection portion 134 formed on the suspension 130 according to the embodiment, and may be coupled to the bottom surface of the diaphragm 110.

The magnetic circuit includes a yoke 330, a magnet 320 and a plate 310. The magnet 320 is disposed outside the voice coil 140 according to the positional relationship between the magnet 320 and the voice coil 140 And the magnet 320 may be positioned in the voice coil 140 and the magnet 320 may be dispersed and positioned in the voice coil 140. The magnet 320 may be made of a material such as neodymium or ferrite according to the embodiment.

The frame 200 constitutes the external shape of the speaker device, accommodates the magnetic circuits 310, 320 and 330 therein, and engages with the edge of the diaphragm assemblies 110, 120 and 130 through the rim of the upper opening. The radiator 400 may further include a radiator 400 formed of a material such as a metal having high thermal conductivity as shown in FIG. 2 to improve the heat radiation performance according to the embodiment. The radiator 400 is configured to discharge the heat generated from the voice coil 140 to the outside. As shown in the figure, the radiator 400 may be configured to be coupled to an opening formed on the bottom surface of the frame 200 including a plurality of radiating holes. Further, the radiator preferably contacts the magnetic circuits 310, 320, and 330 to discharge heat transmitted to the magnetic circuits 310, 320, and 330 through conduction.

Such a speaker device is assembled by, for example, a first process of assembling a magnet and a plate, and coupling the magnet and the plate to a frame in which a yoke and a radiator are inserted and projected; A second step of coupling the suspension, the voice coil, and the diaphragm; A third step of coupling the assembly of the second process onto the assembly of the first process; And a fourth step of joining the edge to the third process assembly.

The diaphragm assembly includes a suspension 130 that is composed of a metal leaf spring. Suspension material mainly uses phosphor bronze which is excellent in strength and hardness, good in thermal conductivity, and excellent in corrosion resistance and abrasion resistance. Suspension 130 is attached to the bottom of the diaphragm assembly to provide additional damping force to the diaphragm. The voice coil 140 may be directly coupled to the bottom surface of the suspension 130, the end of the voice coil may be connected, and the voice coil may be further provided with an electric path.

Referring to FIG. 3, the suspension 130 of the present invention includes a fixing portion 131 having a shape corresponding to the shape of the outer peripheral portion of the frame 200 (e.g., a track shape). The fixing portion 131 may be fixed on the outer circumferential portion of the frame 200. At both ends in the longitudinal direction L of the fixing portion 131, a rabbit-shaped terminal portion 138 is formed extending in a direction away from a portion close to the major axis. A fixing hole 1381 is provided in the middle of the terminal portion 138 so that bolts or screws can penetrate and engage with the frame.

The two terminal portions 138 are temporarily integrally formed through the cutout portions 139. A cutout groove 1391 is formed at both ends of the cutout 139 so that the cutout 139 can be easily cut after the suspension 130 is aligned and fixed on the frame 200. The first portion 11 and the second portion 12 of the suspension 130 separated from each other by the long axis L are electrically separated from each other when the notch 139 is cut. Accordingly, the positive electrode and the negative electrode of the power source may be connected to the first portion 11 and the second portion 12 of the suspension 130, respectively.

The positioning groove 137 defined by the end of the long shaft portion of the fixing portion 131 and the terminal portion 138 and the cutout portion 139 is engaged with the projection (see FIG. 2) of the suspension 200, The suspension 130 is temporarily fixed with respect to the frame 200 and the position thereof is accurately aligned.

The fixing portion 131, the alignment groove 137, the terminal portion 138, and the cutout portion 139 are point-symmetrical with respect to the center C of the suspension 130. Also, as will be described later, the vibration surface connecting portion 133 and the coil connecting portion 134 are also point symmetrical with respect to the center C of the suspension 130. That is, they are line-symmetrical with respect to the long axis L and are line-symmetrical with respect to the short axis S so that the suspension 130 is fixed on the frame 200 without distinction between the upper surface and the lower surface, (110, 120, 130) can be mounted and fixed.

On the other hand, the cantilever portion 132 is provided at a position of the fixed portion 131 spaced apart from the center C by a predetermined distance on the basis of the short axis S. One end of the cantilever portion 132 is connected to the inner circumferential edge of the fixing portion 131 and the other end is connected to the coil connecting portion 134 to be described later. That is, the fixing portion 131, the cantilever portion 132, and the coil connecting portion 134 are integrally formed of a metal plate.

The cantilever portion 132 is provided only in one of the first region s1 and the second region s2 which are divided with reference to the short axis S. [ In the embodiment of the present invention, a structure in which a pair of cantilevers 132 are provided in each of the first portion 11 and the second portion 12 in the first region s1 is exemplified. The pair of cantilevers have a symmetrical shape with respect to the long axis (L). The cantilever portion is disposed on the inner side of the fixing portion 131 and on the outer side than the vibration surface of the diaphragm to prevent interference with the diaphragm.

The cantilever portion 132 protrudes inward from the fixing portion 131 and extends to the central portion of the diaphragm 110 in the major axis direction and has a coil connecting portion 134, a vibration surface connecting portion 133, a coil connecting terminal 136, Lt; / RTI > The distal end of the cantilever portion 132 is connected to the coil connecting portion 134 and is connected to the vibrating surface connecting portion 133 and the coil connecting terminal 136 via the coil connecting portion 134, And the connecting portion of the end portion and the voice coil is located outside the vibration surface. However, the portion to which the end of the cantilever portion is connected may be a portion where the diaphragm and the cantilever portion 132 do not interfere with each other when the diaphragm moves to generate sound. The voice coil 140 is arranged farther from the center C than the diaphragm 110 with respect to the minor axis S direction and the coil connection portion 134 of the suspension described above is disposed at a position corresponding to the voice coil 140 , The shape of the suspension 130 can be further simplified by connecting the end of the cantilever portion to the portion of the coil connection portion 134 that protrudes more than the diaphragm.

The coil connection portion 134 may have a shape corresponding to a arc shape of at least a part of a coil having a circular cross section. In the embodiment shown in FIG. 3, this section is limited to a portion where the voice coil 140 protrudes more outward than the diaphragm 110. Even though the coupling portion between the voice coil 140 and the suspension 130 is limited to the portion where the voice coil 140 protrudes more outward than the vibration plate 110, the remaining portion of the voice coil 140 and the vibration plate 110 Since the voice coil 140 can be further provided with another portion to which the vibration plate 110 is directly fixed and another portion where the vibration plate 110 is directly fixed to the other portion of the suspension 130 And the suspension 130 can maintain a firm connection.

Since the vibration surface connection portion 133 is connected to the coil connection portion 134, the vibration surface connection portion 133 is connected to the cantilever portion 132 via the coil connection portion 134. The vibrating-surface connecting portion 133 is disposed closer to the center C of the vibration surface than the coil connecting portion 134 and extends in the major axis direction corresponding to the edge of the vibrating plate. The vibration connecting portion 133 is fixed to the bottom surface of the diaphragm 110 and the coil connecting portion 134 is fixed to the upper surface of the voice coil 140 (strictly speaking, the upper surface of the bobbin of the voice coil).

A passage 135 is formed in a region surrounded by the vibration surface connecting portion 133 and the coil connecting portion 134. This not only makes the suspension 130 lighter, but also makes the width of the coil connecting portion 134 and the vibration surface connecting portion 133 constant, making it easier to apply the adhesive applied to the vibration surface connecting portion and the coil connecting portion to adhere to the voice coil and the vibration surface And it is also possible to make the coating thickness of the adhesive more easily and uniformly.

The coil connection terminal 136 is formed in a shape such that the vibration surface coupling portion 133 extends further in the major axis direction with the coil connection portion 134 as a boundary. Since the shape of the vibrating-plate-connecting portion 133 is further elongated in the longitudinal direction, it is easy to manufacture and the coupling force between the suspension 130 and the vibration surface can be further enhanced. Further, since the coil connecting terminal 136, the vibration surface connecting portion 133, and the coil connecting portion 134 extend from one point to another, they are shaped and structurally stable. The coil connection terminal 136 is a portion to which the coil of the voice coil 140 is connected. In Fig. 3, a coil connection terminal 136 is protruded only in one direction with respect to the major axis direction. Since the coil connected to each of the parts 11 and 12 can be formed by one strand each, if the coil connection terminal 136 is protruded in both directions from the long axis direction, So that the coil connecting terminal is protruded only in one direction, so that the driving force for driving the diaphragm can be saved. The width of the coil connection terminal portion may be made slightly thicker than that of the vibration surface connecting portion so that the coil can be made more convenient than soldering.

As described above, the cantilever portion 132 is provided only in one of the first region s1 and the second region s2 which are divided with reference to the short axis S as described above. Such a suspension structure eliminates the rebound structure and significantly reduces the possibility of occurrence of the vibration mode, as compared with the conventional suspension structure in which both ends are fixed ends, so that the noise is not generated in the slim type speaker to which one voice coil is applied It is possible to provide a damping force to the diaphragm and supply power to the central voice coil. Referring to FIG. 11, a case (solid line) in which a pair of cantilevers, that is, two cantilevers (first line) and a pair of cantilevers (first line) An acoustic distortion curve is shown. The lower the acoustic distortion curve, the better the sound quality.

The speaker devices tested are all the same in configuration, except that the cantilever is cantilevered as in the present invention, or whether both ends are fixed. Experimental results show that the loudspeaker system with cantilever suspension has much better acoustic characteristics.

Hereinafter, another embodiment of the suspension according to the present invention will be described with reference to FIGS. 4 to 10. FIG. Hereinafter, the same parts as those of FIG. 3 will be omitted in order to avoid redundancy.

Referring to FIG. 4, the suspension 130 of the present invention differs from the suspension of FIG. 3 in that coil connection terminals are formed on both sides in the major axis direction. The first coil connection terminal 136-1 is formed in the first region s1 and the second coil connection terminal 136-2 is formed in the second region s2. When the coil connection terminal is formed in both areas as described above, the coil connection terminal is provided at the point symmetric with respect to the center C, so that even if the suspension 130 is fixed on the frame 200 in any direction, It is possible to greatly facilitate the operation of connecting the coil of the coil.

5, the coil connection portion is disposed at a position overlapping with the vibration surface of the vibration plate as well as the first coil connection portion 134-1 disposed outside the vibration surface of the vibration plate, as compared with the suspension of FIG. And a second coil connection portion 134-2 that is formed on the first coil connection portion 134-2. The second coil connecting portion 134-2 not only firmly fixes the voice coil 140 and the suspension 130 but also firmly fixes the vibration surface and the suspension. In the case where the second coil connecting portion 134-2 is further provided, the output tends to be further strengthened from the high frequency band (10 kHz to 20 kHz) toward the 20 kHz as compared with the case without the second coil connecting portion 134-2. Accordingly, it is possible to determine whether to add the second coil connection portion according to the output characteristics of the high frequency band which can be determined according to the structure of the diaphragm and the edge.

The suspension shown in FIG. 5 is divided into a first passage 135-1 and a second passage 135-2. The second passage is formed in a region overlapping the vibration surface. The second passage can also be formed in the space defined by the coil connecting portion and the vibration surface connecting portion in the same manner as the first passage.

Referring to FIG. 6, a second vibration surface coupling portion 133-2 (see FIG. 5) having a shape extending in the major axis direction at the center of the vibration surface so as to be engaged with the bottom surface of the concave portion of the vibration surface 112, ) Is further provided. The second vibration surface coupling portion 133-2 can additionally be added when the first vibration surface coupling portion 133-1 is expected to have insufficient coupling force between the suspension and the vibration surface. In the structure of the speaker device of FIG. 2, although the coupling force is sufficient even if only the first vibration-plane-connection portion 133-1 is provided, there is a possibility that the coupling force may be insufficient as the shape and size of the vibration- -2) may be additionally considered.

6 is divided into a first passage 135-1 and a second passage 135-2. The second passage is formed in a region overlapping the vibration surface. As in Fig. 5, also in Fig. 6, it can be said that the second passage is formed in the space defined by the coil connecting portion and the vibration surface connecting portion.

Next, referring to FIG. 7, there is a difference in that the cantilever portion 132 has a straight line shape in contrast to the suspension of FIG. This is applicable, for example, when it is necessary to design a narrower gap between the edge of the vibrating surface 112 and the fixed end (frame 200) to make the speaker device slimmer. Of course, in order to prevent stress fatigue by concentration of stress due to continuous vibration, it is preferable that the connection portions at both ends of the cantilever portion 132 are formed in the shape of a curve.

Next, referring to FIG. 8, there is a difference in that the cantilever portion 132 is configured to be shorter in comparison with the suspension of FIG. The cantilever portion 132 is connected to the region of the fixed portion 131 which is parallel to the major axis in the suspension structure having the long axis and the short axis so that interference between the extension portion 114 (see FIG. 2) of the vibration plate 110 and the cantilever portion can be avoided , The degree of freedom of design that can be designed to avoid the vibration mode by adjusting the length of the cantilever portion is further widened. In particular, it should be noted that the thickness, width, and length of the cantilever portion affecting the vibration mode can be adjusted to the length most relevant to the vibration mode.

Referring to FIG. 9, there is a difference in that one end of the cantilever portion 132 is closely connected to the long axis end portion of the fixing portion, as compared with the suspension of FIG. 2, in a case where the diaphragm has no extended portion at both ends in the longitudinal direction thereof and the length of the cantilever portion 132 is required to be longer to avoid the vibration mode, The form as shown in FIG. 9 can be applied. At this time, if the cantilever portion 132 is connected to the position facing the terminal portion 138 with the boundary between the fixing portion 131, the cantilever portion can be more firmly connected to the fixing portion.

Next, referring to FIG. 10, there is a difference in that a via hole 1362 and a groove 1361 are further provided in the coil connection terminal 136, as compared with the suspension of FIG. The via hole is filled with lead when soldered, and the bonding force between the end portion of the voice coil and the suspension is further increased, and the position of the coil can be regulated by inserting the coil of the voice coil into the groove, So as to make it easier.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments. It is obvious that a transformation can be made. Although the embodiments of the present invention have been described in detail above, the present invention is not limited to these embodiments.

110: diaphragm
112:
114: extension part
116:
120: Edge
130: Suspension
131:
132: cantilever part
133, 133-1, 133-2:
134, 134-1, 134-2: coil connection
135, 135-1, 135-2, 135-3:
136, 136-1, 136-2: coil connection terminal
1361: Home
1362:
137: Position alignment groove
138: terminal portion
1381: Fixing hole
139:
1391: Loops
140: voice coil
200: frame
310, 320, 330: magnetic circuit
310: Plate
320: magnet
330: York
400: Radiator
C: Center
L: Long axis
l1: First part
l2: second part
S: Shortening
s1: first region
s2: second region

Claims (16)

A suspension in which a voice coil is fixed to a central portion of a diaphragm having a long axis and a short axis perpendicular thereto, the suspension being connected to the center portion to supply power to the voice coil and provide a damping force to the diaphragm,
The suspension comprises:
A fixing part fixed along the frame of the speaker device; And
And a pair of cantilevers extending in the major axis direction toward the central portion while being connected in a direction facing inward from the inner periphery of the one fixed portion spaced apart from the central portion by a predetermined distance on the basis of the minor axis,
Wherein the pair of cantilever portions are provided only in one of the first region and the second region which are divided with reference to the minor axis.
The method according to claim 1,
Wherein said pair of cantilevers have a symmetrical shape with respect to a long axis.
The method according to claim 1,
And a coil connection part connected to an end of the cantilever part and fixed to the voice coil.
The method of claim 3,
And a connecting portion between the end of the cantilever portion and the voice coil is located outside the vibration surface.
The method of claim 3,
Wherein the coil connection portion has a shape corresponding to a shape of at least a portion of a coil.
The method of claim 3,
And the coil connection portion includes a first coil connection portion disposed outside the vibration surface of the diaphragm.
The method according to claim 1,
And a vibrating-surface connecting part connected to an end of the cantilever part and fixed to the diaphragm.
The method of claim 7,
Wherein the vibration surface coupling portion is connected to an end portion of the cantilever portion and connected to a coil connection portion fixed to the voice coil.
The method of claim 8,
Wherein the vibrating-surface connecting portion is connected to an end of the cantilever portion via the coil connecting portion.
The method of claim 8,
Wherein the vibrating-surface connecting portion is closer to the center of the vibration surface than the coil connecting portion.
The method of claim 10,
And the vibrating-surface connecting portion includes a first vibrating-surface connecting portion extending in the major axis direction along an edge of the vibrating plate.
The method of claim 10,
And a cylindrical portion is provided at a portion surrounded by the vibrating-surface connecting portion and the coil connecting portion.
The method according to claim 1,
And a coil connection terminal connected to an end of the cantilever portion and to which a coil of the voice coil is electrically connected.
14. The method of claim 13,
Wherein the coil connection terminal is connected to an end of the cantilever portion and has a first vibration surface connection portion extended in the major axis direction and fixed to an edge of the vibration surface of the vibration plate.
15. The method of claim 14,
Wherein the coil connecting terminal and the first vibrating surface connecting portion are connected to each other with a coil connecting portion fixed to the voice coil.
A speaker device comprising the suspension according to any one of claims 1 to 15.

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