KR20180055096A - Tweeter of Electro-magnetic method - Google Patents

Abstract

The present invention relates to an electromagnetic treble speaker, comprising: an upper coil; A lower coil disposed opposite to a lower portion of the upper coil; A diaphragm disposed between the coils; And at least one permanent magnet disposed on the outer side of the coils, wherein the vibration plate is provided with at least one hole or a plurality of vibrating blades at the center of the vacuum plate, The reverse phase disappears and only the treble sound is emitted. This is very advantageous for enlarging and fine-tuning the high-frequency range and contributing to the cost reduction due to elimination of the high-pass filter.

Description

{Tweeter of Electro-magnetic method}

The present invention relates to an electromagnetic high-pitched speaker, and more particularly, to provide a high-resolution, precise and delicate high-quality sound reproduction in a broader range of high frequencies by providing a diaphragm having an opening in the center thereof or an open- And an electromagnetic high-pitched speaker capable of minimizing a magnetoresistance and realizing a maximum efficiency.

Generally speaking, an electro-magnetic speaker has the same principle as that of a coin-type in that an AC magnetic force line generated from a coil wound around a lead wire and a DC magnetic field line derived from a permanent magnet generate a force by cooperating with each other, Unlike a coin-type that is directly driven, the coil is fixed and the iron piece attached to the coil is electrostatically converted to electro-acoustic conversion.

The electromagnetic-type speaker includes a balanced armature speaker and a plate-type speaker. Among these electromagnetic-type speakers, a plate-type speaker is disclosed in Patent Document 1 (Korean Patent Registration No. 1596894) .

In the electromagnetic-type speaker of Patent Document 1, an upper coil and a lower coil are correspondingly arranged, one or more permanent magnets are disposed on the outer sides of the upper and lower coils, a diaphragm is disposed between the upper and lower coils, And the upper and lower damper members support the edge of the lower damper member.

A process of driving the diaphragm in the conventional electro-type speaker having the above-described structure will be described. First, assuming that the upper surface of the permanent magnet is the S pole and the lower surface is the N pole, when the current flow is a positive period, the direction of the internal magnetic field of the upper coil and the direction of the internal magnetic field of the lower coil are mutually opposing So that the diaphragm is N-polarized, so that the diaphragm moves upward.

When the current flow is 0, the diaphragm is neutralized, and the diaphragm itself is positioned at the center by the balancing of the upper and lower magnetic fields of the upper and lower permanent magnets and the restoring force of the diaphragm itself.

When the current flow is negative (-), the direction of the internal magnetic field of the upper coil and the direction of the internal magnetic field of the lower coil are mutually opposing toward each other, and the diaphragm moves to the downward direction.

The above-mentioned electromagnetic-type speaker realizes quick response corresponding to an electric signal by directly driving the diaphragm by reacting with the magnetic force of the permanent magnet in a state where the diaphragm is electromagnetized by the electromagnetic force of the upper and lower coils and the weight of the coil is excluded Which allows for very detailed and detailed sound reproduction.

In addition, the electro-loudspeaker is actively driven by the diaphragm itself and performs sound conversion, thereby minimizing the conversion path distortion rate of the vibration portion, which is advantageous for reproducing clean sound.

However, in the conventional electro-loudspeaker as described above, a single diaphragm integrated in a plate shape such as a circular or elliptical shape is provided and limited to the expansion of a high-tone area. If the diaphragm and the cone diaphragm are provided, There is a problem that molding is difficult due to strong elasticity, which is a characteristic of the material, and thus manufacturing cost is increased.

Further, since a single integrated diaphragm on the plane is supported by the upper and lower damper members and the gap guide is provided on the outer side thereof, an amplitude space is required, thereby increasing the overall thickness and reducing the efficiency And existing electronic-type speakers have a resolution that is limited but limited to bass and ultra-high frequency expansion.

In recent years, the audio market, which is being converted to high resolution, is pursuing a high-resolution sound reproduction with an expanded dynamic range and a lot of musical elements including bass and treble, and thus, for better quality sound reproduction, So that a sophisticated high-resolution dedicated loudspeaker exclusively for treble is desperately required.

KR 10-1596894 B1 (Registered on February 17, 2016)

The present invention has been developed to overcome the disadvantages of the conventional loudspeaker described above. The present invention provides an open type diaphragm having at least one hole or a plurality of vibrating blades at the center of a diaphragm capable of enlarging a treble region and performing delicate control, The bass generated in the wing itself is canceled out in reverse phase and only high-frequency sound is generated and discharged. Therefore, it is an object of the present invention to provide an electromagnetic high-pitched speaker which is very advantageous for enlarging and fine-tuning a high-frequency range.

In addition, the present invention is characterized in that the open diaphragm is directly contacted with the upper and lower coils or the upper and lower permanent magnets without any gap, whereby an electromagnetic field alternating with the electric signals flowing in the upper and lower coils and an active ferromagnetic oscillator The present invention has been made to provide an electromagnetic high-pitched speaker capable of realizing ultra-high resolution of a high frequency band from a high frequency band to a high-frequency band through a low-pass filter.

In addition, by providing the integrated electrode member which is the flexible printed circuit board (FPCB) and the double-sided adhesive pads, it is possible to assemble at least the upper and lower coils or the upper and lower permanent magnets to the integral electrode member using the double-sided adhesive pads, And it is an object of the present invention to provide an electromagnetic high-pitched speaker which can be simplified and minimized by 10 processes, and is suitable for automation of an assembly line.

According to an aspect of the present invention, there is provided an electromagnetic treble speaker comprising: an upper coil; A lower coil disposed opposite to a lower portion of the upper coil; A diaphragm disposed between the coils; And at least one permanent magnet disposed on the outer side of the coils, wherein the diaphragm is provided with an open diaphragm having a hole at the center thereof.

In the electromagnetic type treble speaker of the present invention, the diaphragm is formed as an open diaphragm having a plurality of vibrating blades formed by radially cutting the inner major surface of the hole.

In the electromagnetic type treble speaker of the present invention, the diaphragm may form an adjusting hole for each vibration wing, or may selectively form an adjusting hole in a part of the vibration wing.

In the electromagnetic type treble speaker of the present invention, the diaphragm may be formed of a ferromagnetic material such as iron, nickel, or silicon.

In the electromagnetic type treble loudspeaker of the present invention, the upper coil and the lower coil are arranged in the same size and arranged symmetrically and vertically, and the upper and lower coils disposed symmetrically to directly support the edge of the diaphragm .

 In the electromagnetic treble loudspeaker of the present invention, the upper coil and the lower coil are connected so that their respective magnetic force lines flow so as to face each other.

 In the electromagnetic type treble speaker of the present invention, the upper coil, the lower coil, the upper permanent magnet, the lower permanent magnet, and the diaphragm are concentrically provided in the housing, a first acoustic emission hole is formed in the upper center of the housing, And the upper permanent magnet and the lower permanent magnet have the same magnetization direction.

 In the electromagnetic type treble speaker of the present invention, the upper and lower coils are connected so that the (+) and (-) terminals of the upper and lower coils are connected in parallel through an integral electrode member made of a flexible printed circuit board (FPCB) .

The integrated electrode member includes an upper electrode member covering an upper surface of the upper coil, a lower electrode member covering a lower surface of the lower coil, a connection track connecting the upper and lower electrode members to each other, And two electrode terminals are provided at the ends of the outer electrode terminal member, and the electrode terminals of the upper and lower electrode coils And a pair of electrode patterns are formed so as to form a circuit by separately connecting lead wires.

The integrated electrode member is attached to the upper surface electrode member with a double-sided adhesive pad so that the upper coil and the upper permanent magnet are concentric with each other, and the lower coil and the lower permanent magnet are attached to the lower surface electrode member with a double- And the upper and lower coils as well as the diaphragm are formed by bending both ends of the connecting track so that the diaphragm is concentric with the lower and upper coils, and then inserted into the housing and assembled.

In the electromagnetic type treble speaker of the present invention, the housing is formed of a cap-shaped member, and a first sound output port is formed at the center of the upper surface, a coil wire molding opening is formed on one side thereof, And an electrode withdrawing cutout groove is formed.

According to the electromagnetic treble loudspeaker of the present invention, the diaphragm is provided as an open diaphragm having at least one hole or a plurality of vibrating wings at the center thereof, so that unnecessary low sound can be removed and at the same time, There are advantageous advantages.

Further, since the electromagnetic type treble loudspeaker according to the present invention has a hole or a plurality of vibrating blades formed at the center of the diaphragm, the open diaphragm is very light and has a very small mass. As a result, the circular diaphragm can move at a high speed, It is possible to realize ultra high resolution of high frequency band.

In particular, the electromagnetic high-pitched speaker according to the present invention is provided with a hole as an opening in the center of the diaphragm or an open type in which a plurality of vibrating blades are formed so as to reduce the weight of vibration and to cause the body around the hole or each vibration wing to perform a fine arc motion It is possible to reproduce high-resolution, precise and delicate high-quality sound in a high-frequency region having a large number of vibrations per second, and to provide an advantage that unnecessary low-frequency regions can be easily removed with an anti-phase effect without a separate high-pass filter. It is advantageous in terms of cost reduction as well as providing a wider sound of high resolution than the conventional system.

Further, since the electromagnetic type treble speaker according to the present invention can easily change the dimensions, shape, thickness, and elastic modulus of the vibrating vane, it is possible to control the responsiveness of the high frequency domain frequency, thereby realizing a super high resolution acoustic pattern And provides an easier environment for design and use.

Further, since the electromagnetic type treble loudspeaker according to the present invention does not require an amplitude space because the open diaphragm is directly and closely supported by the upper and lower coils or the upper and lower permanent magnets without a separate damper member, And the magnetic reluctance is reduced to increase the efficiency and to realize the slim profile.

In addition, the electromagnetic high-pitched speaker according to the present invention can be assembled by integrating at least the upper and lower coils, the upper and lower permanent magnets by using the integrated electrode terminal which is a flexible printed circuit board (FPCB) Therefore, there is an advantage that it is very suitable to automate the assembly line while minimizing and simplifying the assembly main process to about 10 processes.

The electromagnetic high-pitched speaker according to the present invention is assembled so that the ends of the upper and lower coils are led out to the coil-guiding track of the integral electrode member, and then can be bent and formed into a single piece by using a roller or the like. It is very suitable for automation as well as productivity improvement.

1 is a cross-sectional view of an electromagnetic treble speaker according to a preferred embodiment of the present invention.
2 is a plan view of Fig.
3 is a bottom view of Fig.
4 is an enlarged view showing an excerpt of a portion of Fig.
5 is an exploded perspective view of an electromagnetic treble speaker according to a preferred embodiment of the present invention.
FIG. 6 is a plan view and a longitudinal sectional view showing a housing applied to the electromagnetic type treble speaker of the present invention.
7 is a plan view and a longitudinal sectional view showing a coil according to the present invention.
FIG. 8 is a plan view showing a diaphragm extracted from an electromagnetic type treble speaker according to the present invention. FIG.
FIG. 9 is a plan view and a bottom view of an integral type electrode member in an electromagnetic type treble speaker according to the present invention. FIG.
10 and 11 are perspective views showing diaphragms according to another embodiment of the electromagnetic treble speaker according to the present invention.
12 to 19 are views for explaining an assembling process of the electromagnetic type treble speaker according to the present invention.
20 is a diagram showing another embodiment of an electromagnetic treble speaker according to the present invention.
FIG. 21 is a graph showing a frequency response characteristic of an electromagnetic high-pitched speaker according to the present invention and a frequency response characteristic of a conventional speaker.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings of an electromagnetic treble speaker according to a preferred embodiment of the present invention. For reference, the size, line thickness, and the like of the components shown in the drawings referred to in describing the present invention may be somewhat exaggerated for ease of understanding. Further, the terms used in the description of the present invention are defined in consideration of the functions of the present invention, and may vary depending on the user, the intention of the operator, customs, and the like. Therefore, the definition of a term should be based on the contents of the entire specification.

1 to 9 are views illustrating an electromagnetic treble speaker according to a preferred embodiment of the present invention.

As shown in the figure, an electromagnetic high-pitched speaker according to the present invention includes a housing 10 having a cap-shaped cross section, an upper coil 20 mounted in an upper space inside the housing 10, A diaphragm 40 disposed between the coils, and upper and lower permanent magnets 50 and 60 disposed on the outer sides of the coils, respectively, . The upper and lower coils 20 and 30 are configured to be connected to the integrated electrode member 70 so as to be supplied with current.

The housing 10 must have a space for installing the upper and lower coils 20 and 30, the diaphragm 40, the upper and lower permanent magnets 50 and 60, the integral electrode member 70, Shaped cross section, and is preferably made of a non-magnetic material such as aluminum or the like. The housing 10 has an acoustic discharge port 11 formed at the center of the upper surface thereof and a coil wire molding opening 12 formed on one side thereof and a connection track 73 of the integral electrode member 70 An electrode withdrawing cutout groove 13 for withdrawing an electrode for preventing damage is formed.

Lead wires 21 such as a positive lead wire and a negative lead wire are drawn out to one side of the upper coil 20 and the lead wires 21 of the upper coil 20 are connected to the upper surface electrode And is connected to the first electrode terminal 71a formed on the member 71. The upper coil 20 is assembled inside the upper permanent magnet 50 and installed in the upper space of the housing 10.

The lower coil 30 is disposed so as to be spaced apart from the lower portion of the upper coil 20 by a thickness of the diaphragm 40 and positioned inside the lower permanent magnet 60 in the lower space of the housing 10 .

Lead wires 31 such as a positive lead wire and a negative lead wire are drawn out to one side of the lower coil 30 and the lead wires 31 of the lower coil 30 are led out to the lower surface of the lower electrode 30. [ And is connected to the second electrode terminal 72a formed on the member 72. [

As mentioned above, the upper permanent magnet 50 is disposed on the outer side of the upper coil 20, and the lower permanent magnet 60 is disposed on the outer side of the lower coil 30, all of which are provided in a washer type.

The upper and lower coils 20 and 30 are connected such that their magnetic force lines are mutually opposed to each other so that the diaphragm 40 is electromagnetized through the upper and lower coils 20 and 30, . The diaphragm 40 vibrates up and down in response to a positive period and a negative periodic signal applied to the upper and lower coils 20 and 30.

The diaphragm 40 is installed directly in close contact with the upper coil 20 and the lower coil 30 in a symmetrical manner and is disposed concentrically with the upper and lower coils 20 and 30 . The diaphragm 40 has a body 41 having a main function of vibration and an edge 42 provided outside the body 41. The diaphragm 40 has a body 41, And a plurality of vibrating vanes 44 formed radially around the holes 43. The vibrating vanes 44 are formed in the shape of a circle. The diaphragm 40 is formed of a ferromagnetic material such as iron, nickel, or silicon.

Since the diaphragm 40 is directly installed between the upper and lower coils 20 and 30 of the same size and does not need an amplitude space and is directly driven by the electromagnetic force of the upper coil 20 and the lower coil 30 The magnetic reluctance is reduced and the efficiency is increased. As a result, a quick response corresponding to the electric signal is obtained, so that very fine sound reproduction is possible.

In particular, the diaphragm 40 of the open type has the same circumference as the inner diameter of the upper and lower coils 20 and 30 (the diaphragm shown in the diaphragm of FIG. 5) in a state where the outer periphery thereof is supported by the upper and lower coils 20 and 30 The vibration vanes 44 oscillate while oscillating upward and downward as shown by the imaginary line in Fig. The bass region generated in the vibrating vane 44 itself by the groove between the hole 43 and the vibrating vane 44 of the diaphragm 40 is annihilated by itself in a reverse phase so that the vibrating vane 44 is subjected to circular motion It is very advantageous to obtain an electromagnetic high-pitched speaker.

The open diaphragm 40 is directly and tightly supported by the upper and lower coils 20 and 30 and the upper and lower permanent magnets 50 and 60 without any gap so that the electric signal flowing through the upper and lower coils 20 and 30 An alternating electromagnetic field and an active vibrating body which is self-driven as it is magnetized. Thus, it is possible to realize an ultra high resolution of a high frequency band ranging from a high frequency band to a high frequency band.

The diaphragm 40 is shown as having a vibrating vane 44 formed radially in the central hole 43, but it may be provided with a circular hole 43 of a closed type as shown in FIG. In this case, the body 41 around the hole 43 vibrates while moving up and down with respect to the same circumference, which is the inner diameter of the upper and lower coils 20 and 30. The bass region generated by the body 41 of the diaphragm 40 itself is annihilated in a reverse phase by the holes 43 of the diaphragm 40 and the body 41 of the diaphragm 40 is moved by the circular motion Only the generated high-frequency sound is emitted.

The closed hole 43 may be formed in various closed shapes such as an oval shape or a square shape in addition to the circular shape.

As the size and the area of the hole 43 of the diaphragm 40 are changed, the bass extinction region is also changed. When the size and the area of the hole 43 are small, the low-frequency extinction region is low and the low-frequency extinction region is gradually expanded to a high-frequency region as the size and the area of the hole 43 are increased.

The diaphragm 40 can vary the size of the hole 43 and the area of the diaphragm 40 so that the diaphragm 40 can be varied in design, It is advantageous not only for enlargement and diversification of areas but also for fine adjustment.

The upper and lower coils 20 and 30 are connected to each other by positive poles of the upper and lower coils so that parallel connection is achieved through the integral electrode member 70 made of a flexible printed circuit board (FPCB) Connect the poles together.

9, the upper electrode member 71 and the lower electrode member 72 are connected to each other through a connection track 73 and the outer electrode terminal member 72 is connected to one side of the lower electrode member 72, (74) extends in line with the connection track (73).

The upper and lower electrode members 71 and 72 are formed in the same shape as the planar shapes of the upper and lower coils 20 and 30 and two First and second electrode terminals 71a and 72a are provided and two third electrode terminals 74a are provided at an end of the external electrode terminal member 74. [ The first and second electrode terminals 71a and 72a of the integral electrode member 70 are connected to the third electrode terminal 74a by connecting the lead wires of the upper and lower coils 20 and 30 separately. A pair of electrode patterns 75a, 75b and 75c are formed.

The upper surface electrode member 71 is provided with a first member through hole 71b at the center thereof and a U-shaped coil guide track 71c (not shown) for pulling out the lead wires of the upper coil 20 at one side of the first member through- And two first electrode terminals 71a for soldering and fixing the lead wire 21 of the upper coil 20 are provided around the coil guide track 71c.

The lower electrode member 72 has a second member through hole 72b at the center thereof and a U-shaped coil induction member 72 for drawing out the lead wires 31 of the lower coil 30 to one side of the second member through- And two second electrode terminals 72a for brazing and fixing the lead wires 31 of the lower coil 30 are provided around the coil guide track 72c .

The upper and lower electrode members 71 and 72 are electrically connected to the electrode patterns 75a and 75b formed on both sides of the positive and negative electrodes so that the electrode pattern 75c on the lower surface Connection holes 76a and 76b for electrically connecting to the electrode pattern 75b may be provided.

It is preferable that the integral electrode member 70 is covered with an insulating sheet for insulation with other components except for each electrode terminal portion.

The double-sided adhesive pad 80 is two thin pads provided to improve assembling workability between the upper and lower coils 20 and 30 and the integral electrode member 70. The double-sided adhesive pad 80 is formed in a planar shape when the upper coil 20 and the upper permanent magnet 50 are coupled or the lower coil 30 and the lower permanent magnet 60 are coupled, A through hole 81 having the same size as the inner diameter of the lower coils 20 and 30 is drilled and an outward arc of the upper and lower coils 20 and 30 is formed on one outer circumference, The coil lead-out portion 82 is formed. The double-sided adhesive pad 80 may be of any type as long as it has an adhesive force on the upper and lower surfaces. It is preferable that a release paper is provided on the upper and lower surfaces having adhesive force.

The assembling process of the electromagnetic high-pitched speaker according to the present invention will be described.

First, by aligning the upper and lower permanent magnets 20 and 30 on the work table and inserting one upper and lower coils 20 and 30 respectively in the upper and lower permanent magnets 50 and 60, Thereby obtaining a magnetic circuit (see Fig. 12). At this time, the lead wires 21 and 31 of the upper and lower coils 20 and 30 are pulled upward and protruded.

As described above, one double-sided adhesive pad 80 is attached on the upper permanent magnet 50 of the upper magnetic circuit and another double-sided adhesive pad 80 is attached on the lower permanent magnet 60 of the lower magnetic circuit 13). At this time, the lead wires 21 and 31 of the upper and lower coils 20 and 30 are positioned in the coil lead-out portion 82 outside the double-sided adhesive pad 80 so that plastic deformation is not generated.

Thereafter, the integral electrode member 70 is mounted on the upper surface of the double-sided adhesive pad 80 on the upper and lower coils 20 and 30 so that the upper electrode member 71 is positioned on the upper coil 20, (See Fig. 14). At this time, the upper portions of the upper and lower electrode members 71 and 72 and the second member through holes 71b and 72b are attached so as to coincide with the inner diameters of the upper and lower coils 20 and 30 constituting the magnetic circuit, The lead wires 21 and 31 of the coils 20 and 30 must be drawn out through the coil guide tracks 71c and 72c of the upper and lower electrode members 71 and 72.

The upper coil 20 and the upper permanent magnet 50 as well as the lower coil 30 and the lower permanent magnet 50 which are the lower magnetic circuits are formed in the integrated electrode member 70 using the double- The reason for attaching the diaphragm 60 to the diaphragm 40 is that it is possible to unitize the components and the operation of assembling the diaphragm 40 together with the diaphragm 40 is facilitated due to unitization of such components, Because.

After the integral electrode member 70 is attached to the upper and lower coils 20 and 30 as described above, the one end of the lead wires 21 and 31 of the upper and lower coils 20 and 30, The upper and lower coils 20 and 30 are pressed and pressed while being gently pressed in the direction of the first and second electrode terminals 71a and 72a provided on one side of the coil guide tracks 71c and 72c of the lower electrode members 71 and 72, The lead wires 21 and 31 are bent in a horizontal state in which they are in contact with the first and second electrode terminals 71a and 72a on one side of the coil guide tracks 71c and 72c (see FIG. 15).

The ends of the lead wires 21 and 31 of the upper and lower coils 20.30 are positioned within the first and second electrode terminals 71a and 72a without departing from the first and second electrode terminals 71a and 72a And then soldered.

The upper surface electrode member 71 of the integral electrode member 70 is seated in the housing 10 while the acoustic discharge port 11 of the housing 10 is set on the work table, The first electrode terminal 71a of the upper surface electrode member 71 is positioned in the coil wire molding opening 12 of the housing 10 and the connection track 73 of the integral electrode member 70 is inserted into the electrode withdrawal opening And inserted into the groove 13 to be assembled (see Fig. 16).

The diaphragm 40 is disposed on the upper coil 20 and the upper permanent magnet 50 as shown in FIG. 17, and the upper coil 20 and the hole 43 in the center of the diaphragm 40 are disposed so as to be concentric with each other . Subsequently, the lower coil 30 and the lower permanent magnet 60 are positioned on the diaphragm 40 while bending both ends of the connection track 73 of the integral electrode member 70 by 90 degrees (see FIG. 18). The center of the diaphragm 40 interposed between the upper coil 20 and the upper permanent magnet 50 as the upper magnetic circuit and the lower coil 30 and the lower permanent magnet 60 as the lower magnetic circuit, Should be arranged.

The upper and lower magnetic circuits are mounted together with the diaphragm 40 in the housing 10 by molding the housing 10 with the lower end of the housing 10 bent 90 ° inside the housing 10 19). As a result, the lead-out wire 21 of the upper coil 20 may be molded by filling an epoxy resin or the like into the coil wire molding hole 12 of the housing 10, if necessary.

11 is a view showing another embodiment of an open diaphragm applied to the electromagnetic treble speaker of the present invention. In this embodiment, an adjustment hole 45 is additionally formed for each vibration blade 44 constituting the open diaphragm 40. [ Although the adjustment hole 45 is shown as being provided for each vibration wing, it is also possible to selectively form only a part of the vibration wing.

When the open type diaphragm of another embodiment is applied to the electromagnetic treble speaker of the present invention, it is freely driven in arc form with reference to the root portion of the vibrating vane 44, which is the edge 42 side close to the outer periphery of the body 41. At this time, the area of the hole 43 is increased due to the gap between the holes 43 and the vibration vanes 44, so that the low-frequency extinction region must be increased to the high-frequency region. Therefore, the diameter of the hole 43 in the center of the body 41 as well as the interval between the vibrating blades 44 and the adjustment through hole 45 can be appropriately combined and adjusted according to the frequency of the high tone region to be obtained.

In other words, as the diameter of the hole 43 and the distance between the vibrating blades 44 are made smaller, the low sound attenuation region is lowered. As the diameter of the hole 43 and the interval between the vibrating blades 44 are increased, The area is gradually increased and moved to the high-frequency region, so that only higher frequencies can be obtained.

20 is a diagram illustrating an electromagnetic high-pitched speaker according to another embodiment of the present invention. Here, the diameter of the edge 42, which is the outer side of the diaphragm 40, is the same as the outer diameter of the upper and lower coils 20 and 30, and the upper and lower coils 20 and 30, And 30 are stacked one on top of the other.

According to the electromagnetic high-pitched speaker of the above-described embodiment, the number of the permanent magnets 50A is reduced to one, which reduces the overall number of assembled parts, thereby simplifying the assembly process and reducing the assembly cost.

The remaining configurations and operations are the same as or similar to those of the previously described embodiment, and thus a detailed description thereof will be omitted.

FIG. 21 is a graph showing a frequency response characteristic of an electromagnetic high-pitched speaker according to the present invention and a frequency response characteristic of a conventional speaker.

As can be seen from the graph of FIG. 21, the conventional electromagnetic-type loudspeaker showed a general characteristic of reproducing a high-frequency limit frequency of about 10 kHz. On the other hand, in the electromagnetic treble speaker of the present invention, since the open type diaphragm itself extinguishes the low frequency and reproduces only the high frequency, and the mass of the diaphragm itself is very low and performs circular arc motion, As a result.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments and the accompanying drawings, and various changes and modifications may be made by those skilled in the art And all of the design change elements will be included in the present invention as long as the driving principle and the arrangement of the components are consistent with the equivalent concept of the present invention.

10: housing 11: sound outlet
12: coil wire molding sphere 13: electrode withdrawal incision groove
20: upper coil 21, 31: lead wire
30: lower coil 40: diaphragm
41: body 42: edge
43: hole 44: vibrating wing
45: adjusting aperture 50: upper permanent magnet
60: lower permanent magnet 70: integral electrode member
71: upper surface electrode member 72: lower surface electrode member
73: connection track 74: external electrode terminal member
80: Double-sided adhesive pad

Claims (7)

An upper coil; A lower coil disposed opposite to a lower portion of the upper coil; A diaphragm disposed between the coils; And at least one permanent magnet disposed outside the coils,
Wherein the diaphragm is an open type diaphragm having a hole formed at the center thereof. The method according to claim 1,
Wherein the open type diaphragm is provided with a plurality of vibrating vanes as the inner major surface of the hole is radially cut. 3. The method of claim 2,
And an adjusting hole is formed in the vibrating blade of the open diaphragm. The method according to claim 1,
Wherein the diaphragm is directly installed between the upper and lower coils symmetrically disposed so that the edges of the diaphragm are opposed to each other, without being fed, in a tightly supported manner. An upper coil; A lower coil disposed opposite to a lower portion of the upper coil; A diaphragm disposed between the coils; And at least one permanent magnet disposed outside the coils,
The upper and lower coils are connected to a flexible printed circuit board (not shown) which can cover the lower surface of the lower coil from the upper surface of the upper coil through one side of the upper and lower coils so that the (+ FPCB) is provided on the upper surface of the lower electrode. 6. The method of claim 5,
The integrated electrode member includes an upper electrode member covering an upper surface of the upper coil, a lower electrode member covering a lower surface of the lower coil, a connection track connecting the upper and lower electrode members to each other, And an external electrode terminal member extending from the external electrode terminal member. The method of claim 6, wherein
Wherein the upper coil and the upper permanent magnet are attached to the upper surface electrode member with a double-sided adhesive pad, and the lower coil and the lower permanent magnet are attached to the lower surface electrode member with a double-sided adhesive pad.

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