KR20150016722A - Microspeaker having expanded center diaphragm - Google Patents

Microspeaker having expanded center diaphragm Download PDF

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Publication number
KR20150016722A
KR20150016722A KR1020130092523A KR20130092523A KR20150016722A KR 20150016722 A KR20150016722 A KR 20150016722A KR 1020130092523 A KR1020130092523 A KR 1020130092523A KR 20130092523 A KR20130092523 A KR 20130092523A KR 20150016722 A KR20150016722 A KR 20150016722A
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KR
South Korea
Prior art keywords
center
diaphragm
center diaphragm
peripheral portion
suspension
Prior art date
Application number
KR1020130092523A
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Korean (ko)
Inventor
김지훈
Original Assignee
주식회사 이엠텍
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Publication date
Application filed by 주식회사 이엠텍 filed Critical 주식회사 이엠텍
Priority to KR1020130092523A priority Critical patent/KR20150016722A/en
Publication of KR20150016722A publication Critical patent/KR20150016722A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

The present invention relates to a microspeaker, and more specifically, to a microspeaker having a center vibration plate expanded to the outside more than an attaching part of a suspension. The present invention, the mivrospeaker having the expanded center vibration plate includes: a frame, a magnetic circuit, a voice coil which is vibrated by mutual electromagnetic force with the magnetic circuit; a side vibration plate which is formed in a ring shape having a hollow punched center, and has a dome part formed on an external circumference part, an internal circumference part, and between the external and internal circumference parts; a center vibration plate including a center part which is located on a punching part of the side vibration part, an attaching part which is overlapped with the internal circumference part of the side vibration, and an expansion part which is expanded to the outside of the attaching part.

Description

[0001] MICROSPEAKER HAVING EXPANDED CENTER DIAPHRAGM [0002]

The present invention relates to a micro speaker. And more particularly to a micro speaker having a center diaphragm that extends further outward than an attachment portion of the suspension.

1 and 2 show a conventional micro speaker. The inner ring magnet 22 and the outer ring magnet 23 are provided in the frame 10 and the yoke 21, the inner ring magnet 22, the outer ring magnet 23, the inner ring top plate 24 and the outer ring top plate 25, The voice coil 30 is positioned in the air gap between the voice coil 30 and the voice coil 30 and vibrates up and down when power is applied to the voice coil 30. [ The voice coil 30 is attached to the lower surface of the suspension 40 and the side diaphragm 51 and the center diaphragm 52 are provided on the upper and lower surfaces of the suspension 40, Vibrates and generates sound. A protector (60) is coupled to protect parts located inside the speaker. The protector 60 has a ring-shaped steel portion 61 having an opening 63 formed at its center so as to radiate sound and a steel portion 61 inserted thereinto and injection-molded. The frame 10, the side diaphragm 51 And a ring-shaped injection portion 62 which is stacked on the outer peripheral portion of the suspension 40.

The loudspeaker has a low ratio of area occupied by the side diaphragm in the area of the entire diaphragm. However, the micro speaker has a high ratio of the area occupied by the side diaphragm 51 in comparison with the loudspeaker in order to improve low-frequency SPL characteristics.

An object of the present invention is to provide a micro speaker in which the ratio of the area occupied by the center diaphragm to the entire diaphragm is increased by applying the area ratio of the loudspeaker.

The present invention relates to a voice coil comprising a voice coil coiled by a mutual electromagnetic force with a frame, a magnetic circuit, and a magnetic circuit, a ring-shaped ring having a center hole and having a dome portion formed between the outer periphery, the inner periphery, And a center diaphragm having a center portion located on a perforation of the side diaphragm, an attaching portion overlapping with an inner peripheral portion of the side diaphragm, and an enlarged portion extending to the outside of the attaching portion. Provides a speaker.

According to another aspect of the present invention, there is provided a micro speaker including an extended center diaphragm, wherein the extended portion of the center diaphragm is an arc.

According to another embodiment of the present invention, the extended portion of the center diaphragm is a reverse arc having a convex lower surface and a concave upper surface.

According to another aspect of the present invention, there is provided a micro speaker including an extended center diaphragm, wherein the extended portion of the center diaphragm has a parallel surface extending outwardly of the inverted portion.

According to another aspect of the present invention, there is provided a micro speaker having an extended center diaphragm, wherein the extended portion of the center diaphragm has an inclined surface inclined upward from the attachment portion and a parallel surface extending outwardly of the inclined surface and parallel to the inclined surface. do.

According to another embodiment of the present invention, the extension portion of the center diaphragm includes a normal arc having a concave lower surface and a convex upper surface, a reverse arc having a concave lower surface and a concave upper surface, at least two of inclined surfaces and parallel surfaces And a micro-speaker is formed in a shape of a micro-speaker.

According to another embodiment of the present invention, the center portion of the center diaphragm is separately manufactured and attached to the extension portion.

According to another aspect of the present invention, there is provided a micro speaker including an extended center diaphragm, wherein the micro diaphragm further comprises a suspension for guiding vibrations of the side diaphragm, the center diaphragm, and the voice coil, to provide.

The suspension may include a ring-shaped inner peripheral portion overlapping the inner peripheral portion of the side diaphragm and the attachment portion of the center diaphragm, a ring-shaped outer peripheral portion seated on the frame, and a connecting portion connecting the inner peripheral portion and the outer peripheral portion And the extended portion includes an escaped portion to prevent interference with a part of the connection portion connected to the inner peripheral portion.

The micro speaker having the extended center diaphragm provided by the present invention has an advantage that the effective area of the center diaphragm is increased to improve the acoustic characteristics of the micro speaker.

1 and 2 show a conventional micro speaker,
FIG. 3 is an exploded perspective view of a micro speaker having an extended center diaphragm according to a first embodiment of the present invention, FIG.
4 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a first embodiment of the present invention.
5 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a second embodiment of the present invention.
6 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a third embodiment of the present invention.
7 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a fourth embodiment of the present invention.
8 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a fifth embodiment of the present invention.
9 is a perspective view of a micro speaker having an extended center diaphragm according to a sixth embodiment of the present invention, except for a protector.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 3 is an exploded perspective view of a micro speaker having an extended center diaphragm according to a first embodiment of the present invention, and FIG. 4 is a sectional view of a micro speaker having an extended center diaphragm according to the first embodiment of the present invention.

The micro speaker having the extended center diaphragm according to the first embodiment of the present invention includes a magnetic circuit coupled to the inside of the frame 100, a vibration module mounted on the frame 100, A protector 600 for protecting the magnetic circuit and the vibration module, and an internal terminal 700 for passing an electric signal from the outside of the micro speaker to the inside of the micro speaker through the frame 100.

The magnetic circuit of the micro speaker having the extended center diaphragm according to the first embodiment of the present invention is an inner and outer ring magnet type and includes a yoke 210, an inner ring magnet 220 attached on the yoke 210, A ring-shaped outer ring magnet 230 installed at the outer side of the inner ring magnet 220 at a predetermined interval from the magnet 220, an inner ring top plate 240 attached to the inner ring magnet 220, And an outer ring top plate 250 attached to the outer ring. The magnetic circuit including the yoke 210, the outer ring magnet 230 and the outer ring top plate 250 may be inserted into the mold at the time of injection molding of the frame 100 and coupled by insert injection, Or may be assembled through a separate attachment process after manufacture. In the micro speaker according to the first embodiment of the present invention, the frame 100 and the magnetic circuit are combined by insert injection.

There is a predetermined gap between the inner ring magnet 220 and the outer ring magnet 230. The lower end of the voice coil 300 to be described later is located in the gap, that is, in the air gap. A magnetic field is formed between the inner ring magnet 220 and the outer ring magnet 230. When a current flows through the voice coil 300, the voice coil 300 vibrates up and down due to mutual electromagnetic force.

The vibration module included in the micro speaker according to the first embodiment of the present invention includes a voice coil 300, a suspension 400, a side diaphragm 510, and a center diaphragm 520. The lower end of the voice coil 300 is positioned in the air gap between the inner ring magnet 220 and the outer ring magnet 230 as described above.

The suspension 400 includes a ring-shaped outer circumferential portion 420 which is seated on the frame 100 and is pierced at the center, a central portion 410 which is perforated at a distance from the outer circumferential portion 420, And a connection part 430 connecting the outer peripheral part 420 and elastically supporting the central part 410. The suspension 400 may be made of FPCB to provide electrical connection from the internal terminal 700 to the voice coil 300. In this case, the first land portion for electrical connection with the internal terminal 700, And a second land portion 450 for electrical connection with the voice coil 300 may be provided in the central portion 410. [ Meanwhile, the inner wheel top plate 240 may be provided with the escaping portion 242 so that the second land portion 450 can avoid the interference when the second land portion 450 is vibrated by the vibration.

A voice coil 300 is attached to the lower surface of the suspension 400 and a side diaphragm 510 and a center diaphragm 520 are attached to the upper surface of the suspension 400. [ Only the outer periphery 420 of the suspension 400 is supported on the frame 100 and the center portion 410 and the connection portion 430 are not supported by other components but are capable of vibrating up and down in a floating state in the air. Therefore, it serves to guide the vibration of the voice coil 300, the side diaphragm 510, and the center diaphragm 520 attached to the suspension 400.

The side diaphragm 510 includes a dome portion 516 protruding between the inner peripheral portion 512 and the outer peripheral portion 514 and between the inner peripheral portion 512 and the outer peripheral portion 514 in a ring- do. The inner peripheral portion 512 of the side diaphragm 510 is attached to the central portion 410 of the suspension 400 and the outer peripheral portion 514 of the side diaphragm 510 is attached to the outer peripheral portion 514 of the suspension 400, (516) is not attached to the suspension (400) but protrudes.

The center diaphragm 520 is attached to the center portion 410 of the suspension 400. The center diaphragm 520 includes a center portion 521 located on the perforation of the side diaphragm 510, an attachment portion 525 overlapping the inner peripheral portion 512 of the side diaphragm 510, As shown in FIG. The center portion 521 may include dome portions 523 and 524 to further secure the rigidity of the center diaphragm 520. The dome portions 523 and 524 may include a retro dome portion 523 protruding downward from the attachment portion 525 and a static dome portion 521 protruded upward from the attachment portion 525. [ The dome portions 523 and 524 are not formed and the flat portion 522 having the same height as the attachment portion 525 is formed on the portion of the suspension 400 that overlaps the second land portion 450 .

The extension portion 526 extends outward from the attachment portion 525 and has a sloped surface 527 inclined upward and a parallel surface 528 disposed outside the inclined surface 527 so that the height increases toward the outside. The parallel surface 528 is parallel to the attachment portion 525 and the suspension 400. The expanded portion 526 is not formed only of the parallel surface 528 and the inclined surface 527 and the parallel surface 528 are provided together to enlarge the area of the expanded portion 526 within a limited space .

Since the center diaphragm 520 has the extension 526 on the outer side of the attachment 521, it is possible to increase the area of the center diaphragm 520 within a limited space without increasing the size of the microspeaker itself. There is an advantage that the acoustic characteristics are improved as the effective area of the center diaphragm 520 is increased.

5 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a second embodiment of the present invention.

The micro speaker according to the second embodiment of the present invention has the same configuration and shape as the first embodiment of the frame 100, the magnetic circuit, the protector 600, and the internal terminal 700. The configuration of the vibration module according to the first embodiment is the same as that of the vibration module except for the shape of the extension portion 526a of the center diaphragm 520a.

The center diaphragm 520a of the micro speaker according to the second embodiment of the present invention includes a center portion 521a, an attachment portion 525a, and an extension portion 526a. The center portion 521a is located on the perforated portion of the side diaphragm 520 as in the first embodiment. The attachment portion 525a is also attached to the center portion 410 of the suspension 400. [ The extended portion 526a is extended to the outside of the attachment portion 525a. At this time, the shape of the extension portion 526a is an arc, and in particular, a normal arc having a convex shape at the top.

When the extending portion 526a is arcuate, the effective area can be enlarged within a limited space as in the case of the inclined surface.

6 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a third embodiment of the present invention.

The micro speaker according to the third embodiment of the present invention is the same as the first embodiment in the configuration and shape of the frame 100, the magnetic circuit, the protector 600, and the internal terminal 700. The configuration of the vibration module is the same as that of the first embodiment except for the shape of the extension portion 526b of the center diaphragm 520b of the vibration module.

The center diaphragm 520b of the micro speaker according to the third embodiment of the present invention includes a center portion 521b, an attachment portion 525b, and an extension portion 526b. The center portion 521b is located on the perforated portion of the side diaphragm 520 as in the first embodiment. The attachment portion 525b is also attached to the central portion 410 of the suspension 400. [ The extension 526b is extended to the outside of the attachment 525b. At this time, the extension portion 526b has a reverse arc portion 527b having a downward convex shape and a flat portion 528b having a flat shape extended to the outside of the reverse arcuate portion 527b.

 7 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a fourth embodiment of the present invention.

The micro speaker according to the fourth embodiment of the present invention has the same configuration and shape as the first embodiment of the frame 100, the magnetic circuit, the protector 600, and the internal terminal 700. The configuration of the vibration module according to the first embodiment is also the same except for the shape of the extension portion 526c of the center diaphragm 520c of the vibration module.

The center diaphragm 520c of the micro speaker according to the fourth embodiment of the present invention includes a center portion 521c, an attachment portion 525c, and an extension portion 526c. The center portion 521c is located on the perforated portion of the side diaphragm 520, as in the first embodiment. The attachment portion 525c is also attached to the central portion 410 of the suspension 400. [ The extension 526c is extended to the outside of the attachment portion 525c. At this time, the extension portion 526c is formed by a reverse arc portion 527c of a reverse arc which is convex in the lower part at the position closest to the attachment portion 525c and an arc- a regular arc 527c 'of a normal arc, and a parallel portion 528c of a flat shape on the outer side of the foot portion 527c'.

The extension 526c is a combination of the reverse arm part 527c, the dong part 527c ', and the parallel part 528c according to the fourth embodiment of the present invention. In addition to this, it is possible to combine the main palace, reverse palace, and parallel parts sequentially from the inside, or to combine the backward palace and the palace part, the palace part and the provincial palace part in sequence without parallel parts, At least two of the front, rear, back, inclined, and parallel parts may be selected and combined.

8 is a cross-sectional view of a micro speaker having an extended center diaphragm according to a fifth embodiment of the present invention.

The micro speaker according to the fifth embodiment of the present invention is the same as the first embodiment in the configuration and shape of the frame 100, the magnetic circuit, the protector 600, and the internal terminal 700. In addition, the configuration of the vibration module is the same as that of the first embodiment except for the shape of the center diaphragm 520 '.

The center diaphragm 520 'of the micro speaker according to the fifth embodiment of the present invention is formed separately from the center portion 521' and the extension portion 526 '. An attachment portion 525 'for attachment is formed on the outer side of the center portion 521' and the inner side of the extended portion 526 '. In the center diaphragm 520 'of the micro speaker according to the fifth embodiment of the present invention, the attachment part 525' connected to the center part 521 'is first attached to the suspension 400, And an attachment portion 525 'connected with the attachment portion 526' is attached, but the attachment order may be changed.

FIG. 9 is a perspective view of a micro speaker having an extended center diaphragm according to a sixth embodiment of the present invention, except for a protector. FIG.

The micro speaker according to the sixth embodiment of the present invention has the same configuration and shape as the first embodiment of the frame 100, the magnetic circuit, the protector 600, and the internal terminal 700. The configuration of the vibration module is the same as that of the first embodiment except for the shape of the center vibration plate 520 "

The center diaphragm 520 '' of the micro speaker according to the sixth embodiment of the present invention includes a center portion 521 '', an attachment portion 525 '', and an extension portion 526 '' as in the first embodiment . However, in order to avoid interference and collision between the connecting portion 430 of the suspension 400 and the extending portion 526 "at the time of vibration, a portion of the extending portion 526 " There is a difference. Since the connecting portion 430 of the suspension 400 is formed to connect between the central portion 410 and the outer peripheral portion 420 and the outer peripheral portion 420 is seated and fixed on the frame 100, And the collision occurs in the vicinity of the central portion 410. Interference and collision do not occur at the central portion 410 and only interference at the connection portion 430 near the central portion 410 causes interference and collision with the center portion 410. [ A crash occurs. Therefore, it is preferable that the escaping portion formed by deleting the extending portion 526 " is deleted from the boundary between the connecting portion 420 and the central portion 410, and the portion overlapping the predetermined position of the connecting portion 420. For example, From the boundary between the center portion 410 and the center portion 410 and the intermediate portion where the connection portion 420 connects the center portion 410 and the outer peripheral portion 420. [

Thereby preventing collision and interference with the suspension 400 due to the formation of the extension 526 ".

100: frame 210: yoke
220: inner ring magnet 230: outer ring magnet
240: inner ring top plate 250: outer ring top plate
300: Voice coil 400: Suspension
410: central portion 420:
430: connecting portion 440: first land portion
450: second land portion 510: side diaphragm
512: inner housewife 514: outer periphery
516: dome portion
520, 520a, 520b, and 520c:
521, 521a, 521b, 521c:
525, 525a, 525b, 525c:
526, 526a, 526b, 526c:
600: Protector 700: Internal terminal

Claims (9)

frame;
Magnetic circuit;
A voice coil which vibrates due to mutual electromagnetic force with the magnetic circuit;
A side diaphragm formed in a ring shape having a center and having a dome portion formed between an outer peripheral portion, an inner peripheral portion, and an outer peripheral portion and an inner peripheral portion; And
And a center diaphragm having a center portion located on a perforation of the side diaphragm, an attaching portion overlapping with an inner circumferential portion of the side diaphragm, and an enlarged portion extending to the outside of the attaching portion. speaker. The method according to claim 1,
Wherein the extended portion of the center diaphragm is an arc. The method according to claim 1,
Wherein the extended portion of the center diaphragm is a reverse arc having a convex lower surface and a concave upper surface. The method of claim 3,
Wherein the extension of the center diaphragm has a parallel surface extending outwardly of the inverted arch portion. The method according to claim 1,
Wherein the extended portion of the center diaphragm has an inclined surface inclined upward from the attachment portion and a parallel surface extending outwardly of the inclined surface and parallel to the inclined surface. The method according to claim 1,
The extension portion of the center diaphragm is a shape having a concave lower surface and a convex upper surface, a shape having a convex lower surface and a concave upper surface, a combination of at least two of an inclined surface and a parallel surface, speaker. The method according to claim 1,
Wherein the center portion of the center diaphragm is fabricated separately from the extension portion. The method according to claim 1,
And a suspension for guiding vibration of the side diaphragm, the center diaphragm, and the voice coil,
And an attachment portion of the center diaphragm is attached to the suspension. 9. The method of claim 8,
The suspension includes a ring-shaped inner peripheral portion overlapping an inner peripheral portion of the side diaphragm and an attachment portion of the center diaphragm, a ring-shaped outer peripheral portion seated on the frame, and a connecting portion connecting the inner peripheral portion and the outer peripheral portion,
And the extended portion includes an escaped portion that is not interfered with a part of the connection portion connected to the inner peripheral portion.
KR1020130092523A 2013-08-05 2013-08-05 Microspeaker having expanded center diaphragm KR20150016722A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101901137B1 (en) * 2017-07-04 2018-10-16 주식회사 이어브릿지 High-resolution speaker
KR20180125135A (en) * 2017-05-11 2018-11-22 주식회사 이엠텍 High power microspeaker with sub-diaphragm
KR20230087866A (en) * 2021-12-10 2023-06-19 주식회사 이엠텍 Double injection molding diaphragm for microspeaker having coil attachment guide with inner airpass hole

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180125135A (en) * 2017-05-11 2018-11-22 주식회사 이엠텍 High power microspeaker with sub-diaphragm
KR101901137B1 (en) * 2017-07-04 2018-10-16 주식회사 이어브릿지 High-resolution speaker
KR20230087866A (en) * 2021-12-10 2023-06-19 주식회사 이엠텍 Double injection molding diaphragm for microspeaker having coil attachment guide with inner airpass hole

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