KR101543577B1

KR101543577B1 - Receiver having diaphragm built pattern circuit and integrated edge unit

Info

Publication number: KR101543577B1
Application number: KR1020150062284A
Authority: KR
Inventors: 박태복; 이수웅; 김재혁
Original assignee: 주식회사 영진하이텍
Priority date: 2015-05-01
Filing date: 2015-05-01
Publication date: 2015-08-11

Abstract

A receiver including a diaphragm which has an embedded pattern circuit and is integrated with an edge part includes a housing which has a receiving space inside and forms an outer appearance, a permanent magnet which is combined with the bottom side of the center of the receiving space of the housing and vertically provides magnetic lines of force, a plate which is combined with the upper side of the permanent magnet and forms the directions of the magnetic lines of force on one side, a voice coil part which maintains a preset separation distance from the outer sides of the plate and the permanent magnet and is arranged to surround the plate and the permanent magnet, the diaphragm which is combined with the upper side of the voice coil part, is supported by the housing and includes the embedded pattern circuit to receive external power and the edge part which protrudes to the outline region with a donut shape to smoothly vibrate in the vertical direction and protrudes in an upper direction, and a cap which is combined with the upper side of the housing and the upper side of the diaphragm, prevents the separation of the diaphragm, and forms the outer appearance.

Description

[0001] The present invention relates to a receiver having diaphragm built-in pattern circuit and integrated edge unit having a pattern circuit and an integrated diaphragm,

The present invention relates to a receiver, and more particularly, to a receiver having a diaphragm integrated with a pattern circuit and integrated with an edge portion.

An apparatus that reproduces a sound wave by giving a mechanical vibration to a diaphragm by a modulated current corresponding to a voice is referred to as a receiver or a speaker. That is, the receiver is a device for converting an electrical signal into a voice signal.

Speakers (receivers) are connected to audio or amplifiers to amplify the volume of medium and large speakers, such as small-sized sound devices, such as cell phones, notebooks, MP3 players, earphones and portable audio equipment for small speakers There is also. Such a small speaker is referred to as a micro speaker.

In a typical conventional receiver, a permanent magnet, a plate, a fixing pin, a voice coil, a fixing ring, a diaphragm, and a cap are coupled to each other as main components in a housing. Further, the circuit board is attached to the lower part of the housing, and the circuit board and the voice coil are connected to each other through a lead. That is, the connecting wire is connected to the voice coil via the connecting passage formed on the side or bottom of the housing on the circuit board under the housing.

When assembling such a conventional receiver, since the connection process between the external circuit board, the connection lead, and the voice coil is complicated, if it is not an artisan, the connection may be bad and the sound quality of a predetermined standard may not be reproduced.

In addition, when a low-frequency sound is reproduced by using a miniaturized diaphragm of a microwave receiver, the diaphragm may be damaged due to too high a vibration.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned technical problems, and it is an object of the present invention to provide a circuit for receiving external power, which is embedded in a diaphragm and reinforces the surface of the diaphragm through a metal thin film, A diaphragm integrated with a circuit and integrated with an edge portion, and a receiver including the diaphragm are provided.

According to an embodiment of the present invention, there is provided a portable terminal comprising: a housing having an outer shape and having a receiving space therein; A permanent magnet coupled to a bottom surface of a center of a housing space of the housing and providing magnetic force lines in a vertical direction; A plate coupled to an upper portion of the permanent magnet to form a magnetic force line direction; A voice coil part disposed to surround the permanent magnet and the outer surface of the plate while maintaining a constant distance from the outer surface; And a pattern circuit coupled to an upper surface of the voice coil part and supported by the housing, wherein the pattern circuit includes an edge part protruding in a donut shape in an outer area so as to smoothly oscillate up and down, The diaphragm being protruded into the diaphragm; And a cap coupled to an upper portion of the diaphragm and an upper portion of the housing to prevent the diaphragm from departing from the diaphragm and to form an outer shape, and a receiver having a diaphragm integrated with the edge portion.

The diaphragm includes a first edge portion protruding in a donut shape in an outer region so as to smoothly oscillate in a vertical direction, and a second edge portion protruding in a donut shape having a smaller radius than the region where the first edge portion is formed, And an edge portion is formed.

The diaphragm is formed of a nonconductive polymer film, and the edge portion protrudes in a donut shape in an outer region so as to smoothly oscillate in a vertical direction; A reinforcing plate extending outside the edge portion; A central portion extending inwardly of the edge portion to form a plane; A connection terminal block extended from one side of the reinforcing plate to the outside; And an external power connection part connected to the extended end of the wire connection terminal block and having an opening inserted into the external bottom surface of the housing.

In addition, the pattern circuit built in the diaphragm may be formed of a thin metal film, a coil connection terminal formed on a lower surface of the central portion, A connection circuit line formed on a lower surface of the connection terminal block and connected to the coil connection terminal; An external power connection terminal formed on a lower surface of the external power connection part and connected to the wiring circuit line; And a power terminal formed on an upper surface of the external power connection part and connected to the external power connection terminal.

Further, a metal thin film is formed on the surface of the reinforcing plate.

In addition, the edge portion is characterized in that a metal thin film is formed in a screw shape on a surface protruding in a donut shape.

Further, the plate and the housing are formed of a magnetic material.

In addition, a stepped portion for supporting the reinforcing plate is formed on the inner circumferential surface of the upper portion of the housing.

According to another embodiment of the present invention, a pattern circuit for receiving an external power source is incorporated, and an edge portion protruding in a donut shape in an outer region so as to smoothly oscillate in an up-down direction is protruded upward And a diaphragm integrated with the edge portion is provided.

A first edge portion protruding in a donut shape in an outer region so as to smoothly oscillate in a vertical direction; And a second edge portion protruding in a donut shape having a smaller radius than the region where the first edge portion is formed.

Further, a metal thin film is formed on the surface of the reinforcing plate.

A diaphragm having a pattern circuit integrated with an edge portion according to an embodiment of the present invention, and a receiver including the diaphragm,

A circuit for receiving external power is built in the diaphragm, and by strengthening the surface of the diaphragm through the metal foil, it has durability against low frequency vibration.

In addition, since the circuit for receiving external power is formed in the diaphragm, the number of assembled parts is reduced.

In addition, it is formed in a structure having strong durability against low-frequency vibration, so that the sound in the low-frequency band can be reproduced more effectively, and the vibration of the part of the voice coil is evenly distributed to the diaphragm, .

1 is an exploded perspective view of a receiver 1 having a diaphragm integrated with an edge portion in which a pattern circuit according to an embodiment of the present invention is incorporated.
2 is an assembled cross-sectional view of a receiver 1 having a diaphragm integrated with the edge portion with the pattern circuit of Fig.
Fig. 3 is a top view of the diaphragm 22 of the receiver 1 having the diaphragm integrated with the edge portion with the pattern circuit of Fig. 1 incorporated therein. Fig.
Fig. 4 is a bottom view of the diaphragm 22 of the receiver 1 having the diaphragm integrated with the edge portion of the pattern circuit of Fig. 1; Fig.
Fig. 5 is a view showing the coupling of the voice coil part 21 and the diaphragm 22 of the receiver 1 having the diaphragm integrated with the edge part and incorporating the pattern circuit of Fig.
Fig. 6 is a top view of another embodiment of the diaphragm 22 of the receiver 1 with the diaphragm integrated with the pattern portion of Fig. 1 and integrated with the edge. Fig.
7 is an assembled cross-sectional view of a receiver 2 incorporating a pattern circuit according to another embodiment of the present invention and having a diaphragm integrated with an edge portion.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention.

Fig. 1 is an exploded perspective view of a receiver 1 having a diaphragm 22 integrated with an edge portion and incorporating a pattern circuit according to an embodiment of the present invention. Fig. 2 is a cross- Sectional view of the receiver 1 having an integrated diaphragm.

The receiver 1 having the diaphragm integrated with the edge portion and the pattern circuit according to the present embodiment includes only a simple structure for clearly explaining the technical idea to be proposed.

1 and 2, a receiver 1 having a diaphragm integrated with a pattern circuit and integrated with an edge portion includes a fixed body 10, a vibrating body 20, and a cap 30.

The fixture 10 has a housing 11, a permanent magnet 12 and a plate 13 and provides a line of magnetic force in the direction of the vibrator 20.

The vibrating body 20 includes a voice coil part 21 and a diaphragm 22. When the external power source of the AC type is supplied to the voice coil part 21, So that the sound source is reproduced while generating vibration in the vertical direction.

The detailed structure and main operation of the receiver 1 having the diaphragm integrated with the edge portion and the built-in pattern circuit will be described below.

The housing 11 has an outer shape and a receiving space formed therein. That is, in the housing 11, a space capable of accommodating the permanent magnet 12, the plate 13, and the vibrating body 20 is formed with reference to the center portion. In addition, a plurality of air holes are formed in the inner bottom surface of the housing 11 at a predetermined interval, so that the vibrating body 20 can smoothly vibrate.

The permanent magnet 12 is coupled to the bottom surface of the center of the housing space of the housing 11 and provides magnetic force lines in the up and down directions.

The plate 13 is coupled to the upper portion of the permanent magnet 12 to form a direction of the magnetic force line on one side. That is, the plate 13 serves to change the direction of the magnetic force lines.

The plate 13 and the housing 11 are formed of a magnetic material so that the magnetic force lines emitted upward in the permanent magnet 12 can be returned to the permanent magnet 12 through the plate 13 and the housing 11 . The plate 13, the permanent magnet 12, and the housing 11 may be combined using an adhesive.

The voice coil part 21 is disposed so as to surround the permanent magnet 12 and the outer surface of the plate 13 while maintaining a constant distance therebetween.

The diaphragm 22 is engaged with the upper surface of the voice coil part 21 and is supported by the housing 11.

The diaphragm 22 has a pattern circuit for receiving an external power source and has an edge portion 221 protruding in a donut shape in an outer region so as to smoothly oscillate up and down.

On the other hand, a stepped portion is formed on the inner circumferential surface of the upper portion of the housing 11 to support the diaphragm 22 in the inward direction, which is the reinforcing plate 222 - the outer rim portion.

The cap 30 is coupled to the upper portion of the diaphragm 22 and the upper portion of the housing 11 to prevent the diaphragm 22 from escaping and form an outer shape.

Fig. 3 is a top view of the diaphragm 22 of the receiver 1 having the diaphragm integrated with the pattern unit of Fig. 1, and Fig. 4 is a top view of the diaphragm 22 integrated with the edge unit, The lower surface of the diaphragm 22 of the receiver 1 having

3 and 4, the detailed structure and main operation of the diaphragm 22 having the pattern circuit integrated therein and integrated with the edge portion 221 will be described below.

The diaphragm 22 is formed of a non-conductive polymer film and is manufactured as an integral type rather than an assembled type.

The diaphragm 22 may be constituted by stacking at least one layer of a polymer film in order. In this case, the polymer films to be laminated are preferably formed of different kinds of materials. For example, in order to enhance durability due to vibration, the material of the mesh structure may be centered, and different polymer films may be bonded to the upper and lower surfaces of the mesh structure. In addition, the vibration plate 22 may have a structure in which a polymer material is coated on the surface thereof.

The diaphragm 22 includes an edge portion 221, a reinforcing plate 222, a central portion 223, a wire connection terminal block 224, an external power connection portion 225, a power terminal 225A, a metal thin film 226, A terminal 227, a wiring circuit line 228, and an external power connection terminal 229.

The edge portion 221, the reinforcing plate 222, the central portion 223, the wire connection terminal block 224, and the external power connection portion 225 are integrally formed instead of being assembled.

The edge portion 221 protrudes in a donut shape in an outer region so as to smoothly oscillate in a vertical direction. The diaphragm 22 is disposed at a lower portion corresponding to the protruding portion in the form of a donut. Accordingly, the edge portion 221 is stretched in the vertical direction and then shrunk to reproduce the sound source while vibrating.

A metal thin film 226 is formed on the surface of the edge portion 221 protruding in the form of a donut. In order to prevent the edge portion 221 from being durable due to vibration and distorting the donut shape, A thin film 226 is formed.

The metal thin film 226 may be manufactured in a form in which a thin film patterned in advance is attached to the metal thin film 226 or may be manufactured in such a manner that a metal thin film is formed on the entire surface of the vibration plate 22 and then patterned in a desired shape will be. That is, the structure of the pattern circuit and the metal thin film 226 embedded in the diaphragm 22 may be a structure in which a metal thin film patterned in a desired pattern is attached to the diaphragm 22 in advance, A metal thin film may be formed on the entire surface of the substrate, and then patterned in a desired pattern.

In this embodiment, the metal thin film 226 on the surface of the edge portion 221 is formed in a thread-like shape to enhance the durability of the edge portion 221. However, The shape of the thin film 226 may be not only in the form of a thread, but also in the form of parallel strips of metal thin film having a certain distance from each other.

In addition, the first thread form may be formed in the same manner as in the present embodiment, and the second thread form may be formed so as to intersect with the first thread form in a direction opposite to the first thread form, .

Further, the reinforcing plate 222 is extended to the outside of the edge portion 221. That is, the reinforcing plate 222 is formed so as to extend while covering the edge portion 221 to the outer side surface of the edge portion 221. A metal thin film may be formed on the surface of the reinforcing plate 222 to enhance the durability of the diaphragm 22.

The metal thin film on the surface of the reinforcing plate 222 may be made of a structure in which a metal thin film patterned in a desired shape is attached to the diaphragm 22 in advance, or a metal thin film is formed on the entire surface of the diaphragm 22 , Or may be manufactured by patterning in a desired shape. For reference, the metal thin film attached to the surface of the reinforcing plate 222 may be selectively formed according to an embodiment.

The central portion 223 extends inward of the edge portion 221 to form a plane. That is, the central portion 223 extends to the inner side surface of the edge portion 221 to form a planar inner space. The central portion 223 and the reinforcing plate 222 are not attached to the edge portion 221 but are formed integrally by molding the diaphragm 22 of the nonconductive polymer film.

Therefore, it is possible to uniformly distribute the vibration of the voice coil part 21 by making the edge part 221, the central part 223, and the reinforcing plate 222 without a component for attaching them to each other, It is possible to reduce the distortion of the sound source caused by the distortion.

The wiring connection terminal block 224 is formed to extend outward from one side of the reinforcing plate 222 and the external power connection part 225 is connected to the extended end of the connection terminal block 224. Particularly, the external power connection part 225 is formed with an opening to be inserted into the outer bottom surface of the housing 11.

Since the opening area in which the connection terminal block 224 can protrude from the side surface of the housing 11 is formed in the housing 11 so that the connection terminal block 224 can be closely contacted with the surface of the outer surface of the housing 11 After bending, the opening of the external power connection part 225 is inserted into the outer bottom surface of the housing 11.

The pattern circuit incorporated in the diaphragm 22 is formed of a metal thin film. The pattern circuit includes a coil connection terminal 227, a connection circuit line 228, an external power connection terminal 229, and a power terminal 225A. do.

The coil connection terminal 227 is formed on the lower surface of the central portion 223 and the connection circuit wire 228 is formed on the lower surface of the connection terminal 224 and is connected to the coil connection terminal 227. The surface of the wiring circuit line 228 is preferably coated with a polymer film so as to be insulated.

The external power connection terminal 229 is formed on the lower surface of the external power connection part 225 and is connected to the connection circuit line 228.

The power terminal 225A is formed on the upper surface of the external power connection part 225 and is connected to the external power connection terminal 229. [

Therefore, when external power is applied to the power terminal 225A, the external power is transmitted to the coil connection terminal 227 via the pattern circuit.

Fig. 5 is a view showing the coupling between the diaphragm 22 and the voice coil part 21 of the receiver 1 having the diaphragm integrated with the edge part and incorporating the pattern circuit of Fig.

The coil start line 41 and the coil end line 42 of the voice coil part 21 are connected to the coil connection terminal 227 so that the voice coil part 227 is connected to the coil connection terminal 227, So that external power is supplied to the battery 21. The coil start line 41 and the coil end line 42 are attached to the coil connection terminal 227 by using soldering, welding, or an adhesive for metal.

The external power source is an AC signal, and the direction of the electromagnetic force is switched in the vertical direction by the interaction with the magnetic force lines of the permanent magnet 12 in accordance with the direction of the current, thereby vibrating the diaphragm 22 in the vertical direction. For reference, since the surface of the wiring circuit line 228 is coated with a non-conductive material, short-circuiting does not occur even if it comes into contact with the voice coil part 21.

On the other hand, in order to omit the step of connecting the coil start line 41 and the coil end line 42 to the coil connection terminal 227, a part of the connection circuit line 228 which is in contact with the voice coil part 21, And the voice coil part 21 is manufactured so that the coil start line 41 and the coil end line 42 are positioned at the portion where the non-conductive material is removed, and only the voice coil part 21 is attached to the diaphragm 22 It may be possible to shorten the wiring process by only one process of attaching.

FIG. 6 is a top view of another embodiment of the diaphragm 22A of the receiver 1 having the diaphragm integrated with the pattern portion of FIG. 1 and integrated with the edge portion, and FIG. 7 is a cross- Sectional view of a receiver 2 having a built-in diaphragm integrated with the edge portion.

6 and 7, the diaphragm 22A may include a first edge portion 221A and a second edge portion 221B.

The first edge portion 221A protrudes in a donut shape in an outer region so as to smoothly oscillate in a vertical direction.

The second edge portion 221B protrudes in the form of a donut having a smaller radius inside the region where the first edge portion 221A is formed. The protruded height of the second edge portion 221B is preferably formed to be lower than the protruded height of the first edge portion 221A.

The first edge portion 221A and the second edge portion 221B protrude in a donut shape in the outer region so as to smoothly oscillate in the vertical direction. The diaphragm 22 is disposed at the lower portion to correspond to the protruding portion in a donut shape. Accordingly, the first edge portion 221A and the second edge portion 221B are stretched in the vertical direction and then shrunk, thereby reproducing the sound source while vibrating.

A metal thin film 226 may be formed on the protruded surface of the first edge portion 221A and the second edge portion 221B in the form of a thread in the same manner as the edge portion 221 of the diaphragm 22 of FIG.

The diaphragm 22A according to the second embodiment is formed in the same structure as the diaphragm 22 according to the first embodiment except for the dual structure of the first edge portion 221A and the second edge portion 221B . That is, the diaphragm 22A according to the second embodiment can also be formed with the metal thin film 226, the reinforcing plate 222, the central portion 223, and the like in the same manner as the diaphragm 22 of the first embodiment.

Since the radius and the protrusion height of the first edge portion 221A and the second edge portion 221B are different from each other, the thickness and the wrap density of the metal thin film formed on the surface of the second edge portion 221B, Is formed to be smaller than the portion 221A.

The thickness and wrap density of the metal thin film formed on the surfaces of the first edge portion 221A and the second edge portion 221B are basically different from each other in the height difference between the first edge portion 221A and the second edge portion 221B Or to be directly proportional to the radial difference.

The thickness of the polymer film to be coated on the first edge portion 221A is not particularly limited. The thickness of the polymer film coated on the first edge portion 221A may be, for example, The thickness of the second edge portion 221B is preferably larger than the thickness of the film coated on the second edge portion 221B. In addition, the first edge portion 221A may be coated with a non-conductive polymer film.

When the diaphragm 22A is formed as a double protruding structure like the first edge portion 221A and the second edge portion 221B, there is a difference in the range of the translucent frequency band that can be reproduced according to the radius and the protrusion height of each protruding structure do. That is, since the difference in the reproduction band due to the difference in the surface area occurs, the vibration of the voice coil part 21 can be evenly distributed, so that distortion of the sound source due to the knitting vibration can be reduced and a wider band can be reproduced.

The diaphragm has a large difference in vibration level when reproducing a low band, for example, a low band of 400 Hz to 800 Hz. The diaphragm 22 proposed in the present embodiment has a structure in which the edge portion and the reinforcing plate are reinforced with a metal thin film, and thus has a strong durability even in a low frequency band of 400 Hz to 800 Hz.

A receiver 1 having a diaphragm integrated with a pattern circuit according to an embodiment of the present invention and integrated with an edge, and a diaphragm integrated with a pattern circuit and integrated with an edge,

In addition, it is formed in a structure having strong durability against low-frequency vibration, so that the sound in the low-frequency band can be reproduced more effectively, and the vibration of the voice coil part can be evenly distributed.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: Fixture 11: Housing
12: permanent magnet 13: plate
20: vibrating body 21: voice coil part
22, 22A: diaphragm 221: edge portion
221A: first edge portion 221B: second edge portion
222: reinforcing plate 223:
224: Connection terminal block 225: External power connection
225A: power supply terminal 226: metal thin film
227: Coil connection terminal 228: Connection circuit line
229: External power connection terminal 41: Coil starting line
42: coil end line 30: cap

Claims

A housing having an outer shape and a receiving space formed therein;
A permanent magnet coupled to a bottom surface of a center of a housing space of the housing and providing magnetic force lines in a vertical direction;
A plate coupled to an upper portion of the permanent magnet to form a magnetic force line direction;
A voice coil part disposed to surround the permanent magnet and the outer surface of the plate while maintaining a constant distance from the outer surface; And
An edge portion coupled to an upper surface of the voice coil portion and being supported by the housing and having a pattern circuit for receiving an external power supply and protruding in a donut shape in an outer region so as to smoothly oscillate in a vertical direction, A diaphragm on which a protrusion is formed; And
And a cap coupled to an upper portion of the diaphragm and an upper portion of the housing to prevent the diaphragm from separating from the diaphragm and to form an outer shape,
The diaphragm is formed of a non-conductive polymer film,
The edge portion protruding in the form of a donut in an outer region so that vibration is smooth in a vertical direction;
A reinforcing plate extending outside the edge portion;
A central portion extending inwardly of the edge portion to form a plane;
A connection terminal block extended from one side of the reinforcing plate to the outside; And
And an external power connection part connected to an extended end of the wire connection terminal block and having an opening inserted into the external bottom surface of the housing, wherein the external power connection part includes a pattern circuit and a diaphragm integrated with the edge part. .

The method according to claim 1,
The diaphragm includes:
And a second edge portion protruding in a donut shape having a smaller radius than the region where the first edge portion is formed is formed in a donut shape so as to smooth the vibration in the vertical direction And a diaphragm integrated with the edge portion.

delete

The method according to claim 1,
Wherein the pattern circuit incorporated in the diaphragm is formed of a metal thin film,
A coil connection terminal formed on a lower surface of the central portion;
A connection circuit line formed on a lower surface of the connection terminal block and connected to the coil connection terminal;
An external power connection terminal formed on a lower surface of the external power connection part and connected to the wiring circuit line; And
And a power terminal formed on an upper surface of the external power connection part and connected to the external power connection terminal. [5] The receiver of claim 1, wherein the pattern circuit is integrated with the edge part.

The method according to claim 1,
Wherein a metal thin film is formed on a surface of the reinforcing plate, and a diaphragm integrated with the edge portion.

The method according to claim 1,
The edge portion
Characterized in that a metallic thin film is formed in the form of a screw on a surface protruding in the form of a donut, and having a diaphragm integrated with the edge portion.

The method according to claim 1,
Wherein the plate and the housing are formed of a magnetic material, and the diaphragm has a built-in pattern circuit and an integrated diaphragm.

The method according to claim 1,
Wherein a stepped portion for supporting the reinforcing plate is formed on an inner circumferential surface of the upper portion of the housing so as to protrude inwardly and has a diaphragm integrated with the edge portion.

Wherein a pattern circuit for receiving an external power supply is incorporated and an edge portion protruding in a donut shape in an outer region so as to smoothly oscillate in an up and down direction is protruded upwardly. In the integrated diaphragm,
The diaphragm is formed of a non-conductive polymer film,
The edge portion protruding in the form of a donut in an outer region so that vibration is smooth in a vertical direction;
A reinforcing plate extending outside the edge portion;
A central portion extending inwardly of the edge portion to form a plane;
A connection terminal block extended from one side of the reinforcing plate to the outside; And
And an external power connection part connected to an extended end of the wire connection terminal block and having an opening inserted into an external bottom surface of the housing, the diaphragm being integrated with the edge part.

10. The method of claim 9,
A first edge portion protruding in a donut shape in an outer region so as to smoothly move in a vertical direction; And
And a second edge portion protruding in a donut shape having a smaller radius than the region where the first edge portion is formed is formed.

delete

10. The method of claim 9,
Wherein the pattern circuit incorporated in the diaphragm is formed of a metal thin film,
A coil connection terminal formed on a lower surface of the central portion;
A connection circuit line formed on a lower surface of the connection terminal block and connected to the coil connection terminal;
An external power connection terminal formed on a lower surface of the external power connection part and connected to the wiring circuit line; And
And a power terminal formed on an upper surface of the external power connection part and connected to the external power connection terminal.

10. The method of claim 9,
Wherein a metal thin film is formed on the surface of the reinforcing plate, and the diaphragm is integrated with the edge portion.

10. The method of claim 9,
The edge portion
Characterized in that a metallic thin film is formed in the form of a screw on a surface protruding in the form of a donut, and a diaphragm integrated with the edge portion.