WO2022067906A1 - 振膜及发声单体 - Google Patents

振膜及发声单体 Download PDF

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Publication number
WO2022067906A1
WO2022067906A1 PCT/CN2020/122347 CN2020122347W WO2022067906A1 WO 2022067906 A1 WO2022067906 A1 WO 2022067906A1 CN 2020122347 W CN2020122347 W CN 2020122347W WO 2022067906 A1 WO2022067906 A1 WO 2022067906A1
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WO
WIPO (PCT)
Prior art keywords
ring
diaphragm
folding ring
diaphragm body
folding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/122347
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English (en)
French (fr)
Inventor
章统
令狐荣林
肖波
孔晨亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Pte Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Pte Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022067906A1 publication Critical patent/WO2022067906A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the utility model relates to the technical field of sound-generating devices, in particular to a vibrating membrane and a sound-generating unit.
  • the sound-generating unit usually includes a vibration system and a magnetic circuit system.
  • the vibration system includes a diaphragm and a voice coil, and the voice coil is fixed on the diaphragm; the magnetic circuit system forms a magnetic gap, and the voice coil is located inside the magnetic gap.
  • the distortion of the speaker is mainly caused by the nonlinearity of the force-electric coupling coefficient Bl(x), the stiffness coefficient kms(x), the inductance Le(x), and the damping Rms(v).
  • the stiffness coefficient kms(x) is mainly determined by the vibration system (diaphragm, FPC) and the air in the rear cavity.
  • the k(x) of the air in the back cavity ( ⁇ 0 *c 0 2 *s(x) 2 )/(V 0 ), where V 0 is the volume of the air in the back cavity, ⁇ 0 is the density of the air, and c 0 is The speed of sound in air, s(x) is the effective radiation area of the diaphragm at different positions.
  • the purpose of this utility model is to provide a vibrating membrane and a sound-generating unit; the effective radiation area of the vibrating membrane is increased, the total stiffness coefficient and the force-electric coupling coefficient are more matched, and the distortion is reduced; the sound-generating unit adopts the aforementioned vibration membrane, the distortion of the sounding unit is low.
  • one embodiment provides a diaphragm, comprising:
  • the fixing part is arranged on the periphery of the diaphragm body
  • a folding ring part is connected between the diaphragm body and the fixing part, the folding ring part comprises a first folding ring and a second folding ring, the second folding ring and the first folding ring A folding ring is arranged adjacently, the second folding ring is provided with at least two, the first folding ring is arranged protruding toward one side of the diaphragm body, and the second folding ring is facing the diaphragm body The other side is raised.
  • the folded ring includes a first folded ring and at least two second folded rings, and the bulge of the first folded ring and the bulge of the second folded ring are located on opposite sides of the diaphragm body, respectively, so set,
  • the effective radiating area of the diaphragm is increased, and the overall stiffness coefficient and the electromechanical coupling coefficient are more matched, thereby reducing distortion.
  • the first folding ring is connected between the second folding ring and the fixing part, there are two second folding rings, and the two second folding rings are adjacent to each other. It is arranged and connected between the first folding ring and the diaphragm body.
  • the first folding ring is connected between the second folding ring and the diaphragm body, there are two second folding rings, and the two second folding rings are opposite to each other. It is adjacently arranged and connected between the first folding ring and the fixing portion.
  • the cross-section of the first folding ring is semicircular
  • the cross-section of the second folding ring is arc-shaped
  • the cross-sectional radius of the first folding ring is the same as the cross-section of the second folding ring. The radii are equal.
  • the diaphragm body is arranged in a flat plate shape
  • the ring portion is annularly arranged around the periphery of the diaphragm body, and the end of the ring portion close to the diaphragm body It is connected with the diaphragm body in a smooth transition, the end of the folded ring part close to the fixed part is connected with the fixed part in a smooth transition, and the first folded ring and the second folded ring are connected in a smooth transition.
  • the diaphragm body is arranged in a rectangular shape, the corner positions of the diaphragm body are in a circular arc transition, and one of the first folded ring and the second folded ring is connected to the diaphragm.
  • the main body is connected with a smooth transition, and the other is connected with the fixed part in a smooth transition.
  • the folded ring part further includes a connection part connecting two adjacent second folded rings, and the connection part and the second folded ring are both located in the same part of the diaphragm body. side.
  • the fixing portion is provided in a flat plate shape, and the fixing portion and the diaphragm body are on the same horizontal plane
  • an embodiment also provides a sound-generating unit, comprising:
  • the magnetic circuit system includes a main magnet and an auxiliary magnet, the auxiliary magnet is provided on the outer periphery of the main magnet, and the auxiliary magnet and the main magnet are arranged at intervals and form a magnetic gap; and
  • a vibration system the vibration system is located on one side of the magnetic circuit system, the vibration system includes a voice coil and the vibration membrane according to any one of the above technical solutions, the voice coil and the vibration membrane body are fixed, so One end of the voice coil close to the magnetic circuit system extends into the interior of the magnetic gap.
  • the diaphragm in the vibration system adopts the diaphragm described in any of the foregoing technical solutions, and by changing the effective radiation area of the diaphragm, the total stiffness coefficient kms(x) and the electromechanical coupling coefficient Bl(x) ) are more matched, thereby reducing the distortion of the sound produced by the sounding unit.
  • the secondary magnet includes at least two secondary magnet units, and the at least two secondary magnet units are arranged at intervals and surround the outer circumference of the main magnet.
  • FIG. 1 is a schematic diagram of the overall structure of the vibrating membrane of the first embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the overall structure of the diaphragm obtained by cutting along the line A-A of FIG. 1;
  • FIG. 3 is a schematic diagram of the overall structure of the sound-emitting unit made of the diaphragm of the first embodiment of the present invention
  • FIG. 4 is a cross-sectional view of the overall structure of the sounding unit obtained by cutting along the B-B line of FIG. 3;
  • FIG. 5 is a schematic diagram of the overall structure of the vibrating membrane of the second embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of the overall structure of the diaphragm obtained by cutting along the C-C line of FIG. 5;
  • FIG. 7 is a cross-sectional view of the vibrating membrane of the second embodiment of the present invention applied to a sounding unit.
  • 100 magnetic circuit system
  • 110 main magnet
  • 121 secondary magnetic unit
  • 130 magnetic gap
  • 200 vibration system
  • 210 voice coil
  • 220 diaphragm
  • 222 fixed part
  • 223, 2231 the first fold
  • 2232 the second fold
  • 2233 the connecting part.
  • a diaphragm 220 includes a diaphragm body 221 , a fixing portion 222 and a folding ring portion 223 , wherein:
  • the diaphragm body 221 is the main body of the diaphragm 220 , and is the center of the diaphragm 220 , and the voice coil 210 is fixed on the diaphragm body 221 .
  • the fixing portion 222 is arranged in a ring shape, and the fixing portion 222 is located at the periphery of the diaphragm body 221 , and is used to realize the fixed installation of the diaphragm 220 .
  • the ring portion 223 is connected between the diaphragm body 221 and the fixing portion 222.
  • the outer side of the ring portion 223 is connected to the inner side of the fixing portion 222, and the inner side of the ring portion 223 is connected to the diaphragm.
  • the outer side of the main body 221 is connected.
  • the folding ring portion 223 is connected between the diaphragm body 221 and the fixing portion 222 , and the folding ring portion 223 includes a first folding ring 2231 and a second folding ring 2232 .
  • the second folding ring 2232 and the first folding ring 2231 are arranged adjacent to each other, at least two second folding rings 2232 are provided, and the first folding ring 2231 protrudes toward one side of the diaphragm body 221
  • the second folding ring 2232 is arranged to protrude toward the other side of the diaphragm body 221 .
  • the diaphragm body 221 is located in the middle, the periphery of the diaphragm body 221 is the folded ring portion 223 , the periphery of the folded ring portion 223 is the fixed portion 222 , and the diaphragm is fixed by the fixed portion 222 . 220 is installed, and the voice coil 210 is installed through the diaphragm body 221 .
  • the folded ring since the folded ring includes a first folded ring 2231 and at least two second folded rings 2232, the bulge of the first folded ring 2231 and the bulge of the second folded ring 2232 are located on the sides of the diaphragm body 221, respectively. On the opposite sides, this arrangement increases the effective radiation area of the diaphragm 220, and makes the overall stiffness coefficient and the electromechanical coupling coefficient match better, thereby reducing distortion.
  • the first folding ring 2231 is connected between the second folding ring 2232 and the fixing portion 222 , there are two second folding rings 2232 , two of the second folding rings 2232 Two folding rings 2232 are adjacently disposed and connected between the first folding ring 2231 and the diaphragm body 221 .
  • first fold ring 2231 there is one first fold ring 2231 , the first fold ring 2231 is arranged on the periphery of the diaphragm body 221 , and the first fold ring 2231 is arranged adjacent to the fixing portion 222 .
  • the two second folds 2232 there are two second folds 2232 , and the two second folds 2232 are arranged on the periphery of the diaphragm body 221 and are close to the second folds of the diaphragm body 221 .
  • the 2232 is arranged adjacent to the diaphragm body 221 , the two second folding rings 2232 are arranged adjacently, and the two second folding rings 2232 are respectively connected with the diaphragm body 221 and the first folding ring 2231 .
  • first folding ring 2231 there is one first folding ring 2231 and two second folding rings 2232 , the first folding ring 2231 is protruding toward the upper side of the diaphragm body 221 , and the second folding ring 2232 is facing the diaphragm body The underside of 221 is protruded.
  • the first folding ring 2231 is provided with one, the first folding ring 2231 is located at the periphery of the second folding ring 2232 , and the first folding ring 2231 protrudes toward the upper side of the diaphragm body 221 .
  • the cross-section of the first folding ring 2231 is semicircular
  • the cross-section of the second folding ring 2232 is arc-shaped
  • the cross-sectional radius of the first folding ring 2231 is the same as that of the second folding ring 2232 radii of the section are equal.
  • the cross-section of the first folding ring 2231 is semicircular, there are two second folding rings 2232 , and the cross-sections of the two second folding rings 2232 are arc-shaped.
  • the arc shape of the second folding ring 2232 may be a part of a circle, therefore, the cross-sectional radius of the second folding ring 2232 is equal to or substantially the same as the program radius of the first folding ring 2231 .
  • the diaphragm body 221 is arranged in a flat plate shape, the ring portion 223 is annularly arranged around the periphery of the diaphragm body 221 , and the ring portion 223 is close to the One end of the diaphragm body 221 is smoothly connected to the diaphragm body 221 , the end of the folded ring portion 223 close to the fixed portion 222 is smoothly connected to the fixed portion 222 , and the first folded ring 2231 is connected to the fixed portion 222 .
  • the second fold ring 2232 is connected in a smooth transition.
  • the embodiment shown in FIG. 2 is the cross-sectional structure of the diaphragm 220. From the cross-sectional structure, it can be known that the center of the diaphragm 220 is the diaphragm body 221, and the outer periphery of the diaphragm body 221 is the second ring 2232 first, followed by another A second fold ring 2232, the first fold ring 2231 at the outer periphery, and the fixing portion 222 at the outermost periphery.
  • the first folding ring 2231 protrudes toward the upper side of the diaphragm body 221 , the outer edge of the first folding ring 2231 is smoothly connected with the inner edge of the fixing portion 222 , and the inner edge of the first folding ring 2231 is connected with the second outer edge
  • the outer edge of the ring 2232 is smoothly transitioned;
  • the two second folded rings 2232 are both protruded toward the lower side of the diaphragm body 221 , the two second folded rings 2232 are connected together by a smooth transition at the edges, and the outer edge of the outer second folded ring 2232 is connected to the first folded ring
  • the inner edge of the 2231 is smoothly connected and connected, and the outer edge of the inner second folding ring 2232 is smoothly connected and fixed with the outer edge of the diaphragm body 221 .
  • the diaphragm body 221 is arranged in a rectangular shape, the corner positions of the diaphragm body 221 are arc transitions, and one of the first folding ring 2231 and the second folding ring 2232 is connected to the The diaphragm body 221 is connected in a smooth transition, and the other is connected in a smooth transition with the fixing portion 222 .
  • the diaphragm body 221 is substantially rectangular
  • the fixing portion 222 is substantially annular and rectangular, so as to correspond to the diaphragm body 221
  • the first folding ring 2231 and the second folding ring 2232 They are also arranged in a substantially annular rectangle, so as to be arranged between the diaphragm body 221 and the fixing portion 222 .
  • the folding ring part 223 further includes a connecting part 2233 connecting two adjacent second folding rings 2232 , the connecting part 2233 and the second folding ring 2232 are both located at the the same side of the diaphragm body 221 .
  • the connecting portion connecting two adjacent second folding rings 2232 and the positions of the second folding rings 2232 are both located on the same side of the diaphragm body 221 .
  • two second folding rings 2232 are provided, and the connecting portion between the two second folding rings 2232 is lower than the horizontal plane of the diaphragm body 221 , that is, two second folding rings
  • the position of the connection part between the 2232 and the second folding ring 2232 is both on the lower side of the diaphragm body 221 .
  • a sound-generating unit using the diaphragm 220 of the first embodiment is provided, and the sound-generating unit includes a magnetic circuit system 100 and a vibration system 200 . in:
  • the magnetic circuit system 100 includes a main magnet 110 and a sub-magnet, the sub-magnet is disposed on the outer periphery of the main magnet 110 , and a magnetic gap 130 is formed between the sub-magnet and the main magnet 110 .
  • the vibration system 200 is located on one side of the magnetic circuit system 100 .
  • the vibration system 200 includes a voice coil 210 and the aforementioned diaphragm 220 .
  • the voice coil 210 is fixed to the diaphragm body 221 , and the voice coil One end of 210 close to the magnetic circuit system 100 protrudes into the interior of the magnetic gap 130 .
  • the magnetic circuit system 100 includes a main magnet 110 and a sub-magnet in the middle, and the sub-magnet is arranged on the outer circumference of the main magnet 110 , so that a magnetic gap is formed between the main magnet 110 and the sub-magnet 130.
  • the vibration system 200 includes a voice coil 210 and a diaphragm 220 .
  • the diaphragm 220 is fixed above the magnetic circuit system 100 by the fixing portion 222 , and the diaphragm 220 is below the diaphragm body 221 of the diaphragm 220 .
  • the voice coil 210 is fixed, and the lower end of the voice coil 210 extends into the magnetic gap 130 of the magnetic circuit system 100 .
  • the secondary magnet includes at least two secondary magnetic units 121 , and the at least two secondary magnetic units 121 are arranged at intervals and surround the outer circumference of the main magnet 110 .
  • the auxiliary magnetic unit 121 is arranged around the outer circumference of the main magnet 110 , and the auxiliary magnetic unit 121 and the main magnet 110 are arranged at an interval, and the interval forms a magnetic gap 130 to make the sound
  • the end of the coil 210 close to the magnetic circuit system 100 protrudes in.
  • one secondary magnetic unit 121 is provided on the left side of the main magnet 110
  • one secondary magnetic unit 121 is also provided on the right side of the main magnet 110 .
  • the secondary magnetic unit 121 is arranged at intervals between the secondary magnetic unit 121 and the main magnet 110 to form an annular magnetic gap 130 as a whole, so that the magnetic gap 130 corresponds to the voice coil 210 .
  • the number of secondary magnetic units 121 may also be three or four, so as to surround the outer circumference of the main magnet 110 to form a magnetic gap 130 .
  • the main magnet 110 may be a cube or a rectangular parallelepiped
  • the secondary magnetic unit 121 may also be a cube or a rectangular parallelepiped.
  • the secondary magnetic unit 121 is provided on the outer periphery of the main magnet 110 to form the magnetic gap 130 .
  • the diaphragm in the vibration system 200 adopts the diaphragm 200 described in any of the foregoing technical solutions, by changing the effective radiation area of the diaphragm 200, the total stiffness coefficient kms(x) and the force The electrical coupling coefficient Bl(x) is more matched, thereby reducing the distortion of the sound emitted by the sound-generating unit.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the main difference between the second embodiment and the first embodiment is the first folding ring 2231 and the second folding ring 2232, specifically:
  • the first folding ring 2231 is connected between the second folding ring 2232 and the diaphragm body 221 , and the second folding ring 2232 is provided with two One, two of the second folding rings 2232 are disposed adjacent to each other and connected between the first folding ring 2231 and the fixing portion 222 .
  • first folding ring 2231 there is one first folding ring 2231 and two second folding rings 2232.
  • first folding ring 2231 is provided on the second folding ring 2231.
  • the second folded ring 2232 is provided between the first folded ring 2231 and the fixing portion 222 .
  • the first folding ring 2231 protrudes toward the lower side of the diaphragm body 221
  • the two second folding rings 2232 protrudes toward the upper side of the diaphragm body 221 .
  • first folding ring 2231 and two second folding rings 2232 there is one first folding ring 2231 and two second folding rings 2232 , and the inner edge of the first folding ring 2231 is smoothly connected and fixed with the outer edge of the diaphragm body 221 .
  • the two second folding rings 2232 are connected by a smooth transition through the connecting portion 2233, the inner edge of the inner second folding ring 2232 is smoothly connected and fixed with the outer edge of the first folding ring 2231, and the outer edge of the outer second folding ring 2232 is connected with the outer edge of the first folding ring 2231.
  • the inner edge of the fixing portion 222 is smoothly connected and fixed.
  • FIG. 7 is a sound-generating unit using the diaphragm 220 of the second embodiment.
  • the sound-generating unit includes a magnetic circuit system 100 and a vibration system 200 . in:
  • a magnetic circuit system 100 the magnetic circuit system 100 includes a main magnet 110 and a sub-magnet, the sub-magnet is provided on the outer periphery of the main magnet 110, and the sub-magnet and the main magnet 110 are spaced apart and formed Magnetic gap 130 .
  • the vibration system 200 is located on one side of the magnetic circuit system 100, the vibration system 200 includes a voice coil 210 and the diaphragm 220 described in the second embodiment, the voice coil 210 and the vibration The membrane body 221 is fixed, and the end of the voice coil 210 close to the magnetic circuit system extends into the interior of the magnetic gap 130 .
  • the diaphragm 220 in the vibration system 200 adopts the above-mentioned diaphragm 220, so that the effective radiation area of the diaphragm 220 is increased, and the overall stiffness coefficient and the electromechanical coupling coefficient are more matched, thereby reducing distortion.
  • the secondary magnet includes at least two secondary magnetic units 121 , and the at least two secondary magnetic units 121 are arranged at intervals and surround the main magnet 110 the periphery.
  • two secondary magnetic units there may be two secondary magnetic units, two secondary magnetic units 121 are provided on the left and right sides of the main magnet 110 , and the two secondary magnetic units 121 cooperate with one main magnet 110 to form a magnetic gap 130 .
  • the lower end of 210 extends into the interior of magnetic gap 130 .
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plurality means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
  • the terms “installation”, “connection”, “connection”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connected, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise clearly defined.
  • the specific meanings of the above terms in the present invention can be understood according to specific situations.
  • a first feature "on” or “under” a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact.
  • the first feature being “above”, “over” and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

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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

本实用新型提供了一种振膜及发声单体，振膜包括振膜本体、固定部和折环部，固定部设在振膜本体的外围；折环部连接在振膜本体和固定部之间，折环部包括第一折环和第二折环，第二折环和第一折环相邻设置，第二折环设有至少两个，第一折环朝振膜本体的一侧凸起设置，第二折环朝振膜本体的另一侧凸起设置。该发声单体包括磁路系统和振动系统，振动系统包括前述的振膜。折环包括第一折环和至少两个第二折环，第一折环的凸起朝向和第二折环的凸起朝向分别位于振膜本体的相对两侧，如此设置，振膜的有效辐射面积增加，并使得总的劲度系数和力电耦合系数更加匹配，从而降低失真。

Description

振膜及发声单体 技术领域
本实用新型涉及发声装置技术领域，特别是涉及一种振膜及发声单体。
 背景技术
发声单体通常包括振动系统和磁路系统。其中，振动系统包括振膜和音圈，音圈固定在振膜上；而磁路系统形成磁间隙，音圈位于磁间隙的内部。
扬声器的失真主要由力电耦合系数Bl(x)、劲度系数kms(x)、电感Le(x)、阻尼Rms（v）的非线性导致。其中，劲度系数kms(x)主要由振动系统（振膜、FPC）和后腔的空气决定。后腔空气的k（x）=(ρ 0*c 0 2*s(x) 2)/（V 0），其中，V 0是后腔空气的体积，ρ 0是空气的密度，c 0是空气中的声速，s(x)是振膜在不同位置的有效辐射面积。
然而，传统的小后腔扬声器，后腔空气的K(x)对整个扬声器的kms(x)占比更大，腔体越小，则影响越大，容易导致总的劲度系数kms(x)与力电耦合系数Bl(x)无法匹配，从而导致扬声器出现失真。
 技术问题 技术解决方案 有益效果
本实用新型的目的在于提供一种振膜及发声单体；该振膜的有效辐射面积增加，使总的劲度系数与力电耦合系数更加匹配，降低失真；该发声单体采用前述的振膜，发声单体的失真度低。
一方面，一个实施例提供了一种振膜，包括：
振膜本体；
固定部，所述固定部设在所述振膜本体的外围；及
折环部，所述折环部连接在所述振膜本体和所述固定部之间，所述折环部包括第一折环和第二折环，所述第二折环和所述第一折环相邻设置，所述第二折环设有至少两个，所述第一折环朝所述振膜本体的一侧凸起设置，所述第二折环朝所述振膜本体的另一侧凸起设置。
上述振膜，折环包括第一折环和至少两个第二折环，第一折环的凸起朝向和第二折环的凸起朝向分别位于振膜本体的相对两侧，如此设置，振膜的有效辐射面积增加，并使得总的劲度系数和力电耦合系数更加匹配，从而降低失真。
下面进一步对技术方案进行说明：
在其中一个实施例中，所述第一折环连接在所述第二折环和所述固定部之间，所述第二折环设有两个，两个所述第二折环相邻设置并连接在所述第一折环和所述振膜本体之间。
在其中一个实施例中，所述第一折环连接在所述第二折环和所述振膜本体之间，所述第二折环设有两个，两个所述第二折环相邻设置并连接在所述第一折环和所述固定部之间。
在其中一个实施例中，所述第一折环的截面为半圆形，所述第二折环的截面为弧形，所述第一折环的截面半径与所述第二折环的截面半径相等。
在其中一个实施例中，所述振膜本体呈平板状设置，所述折环部呈环状绕设于所述振膜本体的周缘，所述折环部的靠近所述振膜本体的一端与所述振膜本体平滑过渡连接，所述折环部的靠近所述固定部的一端与所述固定部平滑过渡连接，所述第一折环与所述第二折环平滑过渡连接。
在其中一个实施例中，所述振膜本体呈矩形设置，所述振膜本体的拐角位置呈圆弧过渡，所述第一折环和所述第二折环中的一个与所述振膜本体平滑过渡连接，另一个与所述固定部平滑过渡连接。
在其中一个实施例中，所述折环部还包括连接相邻的两个所述第二折环的连接部，所述连接部与所述第二折环均位于所述振膜本体的同一侧。
在其中一个实施例中，所述固定部呈平板状设置，所述固定部与所述振膜本体处于同一水平面上
另一方面，一个实施例还提供了一种发声单体，包括：
磁路系统，所述磁路系统包括主磁体和副磁体，所述副磁体设在所述主磁体的外周，所述副磁体和所述主磁体之间呈间隔设置并形成磁间隙；及
振动系统，所述振动系统位于所述磁路系统的一侧，所述振动系统包括音圈和如上述任一个技术方案所述的振膜，所述音圈与所述振膜本体固定，所述音圈靠近所述磁路系统的一端伸入所述磁间隙的内部。
上述发声单体，振动系统中的振膜采用前述任一个技术方案所述的振膜，通过改变振膜的有效辐射面积，使得总的劲度系数kms(x)与力电耦合系数Bl(x)更加匹配，从而降低了发声单体发出声音的失真度。
下面进一步对技术方案进行说明：
在其中一个实施例中，所述副磁体包括至少两个副磁单元，至少两个所述副磁单元呈间隔设置并环绕在所述主磁体的外周。
 附图说明
构成本申请的一部分的附图用来提供对本实用新型的进一步理解，本实用新型的示意性实施例及其说明用于解释本实用新型，并不构成对本实用新型的不当限定。
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
此外，附图并不是以1:1的比例绘制，并且各个元件的相对尺寸在附图中仅示例地绘制，而不一定按照真实比例绘制。
图1为本实用新型中实施例一的振膜的整体结构示意图；
图2为沿图1的A-A线进行剖切得到的振膜的整体结构截面图；
图3为本实用新型中采用实施例一的振膜制成的发声单体的整体结构示意图；
图4为沿图3的B-B线进行剖切得到的发声单体的整体结构截面图；
图5为本实用新型中实施例二的振膜的整体结构示意图；
图6为沿图5的C-C线进行剖切得到的振膜的整体结构截面图；
图7为本实用新型中实施例二的振膜应用于发声单体的截面图。
附图标注说明：
100、磁路系统；110、主磁体；121、副磁单元；130、磁间隙；200、振动系统；210、音圈；220、振膜；221、振膜本体；222、固定部；223、折环部；2231、第一折环；2232、第二折环；2233、连接部。
 本发明的实施方式
下面结合附图和实施方式对本实用新型作进一步说明：
为使本实用新型的上述目的、特征和优点能够更加明显易懂，下面结合附图对本实用新型的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本实用新型。但是本实用新型能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本实用新型内涵的情况下做类似改进，因此本实用新型不受下面公开的具体实施例的限制。
实施例一：
请参照图1和图2，一种振膜220，包括振膜本体221、固定部222和折环部223，其中：
振膜本体221为振膜220的主体，为振膜220的中心部，音圈210固定在振膜本体221上。
固定部222呈环状设置，固定部222位于振膜本体221的外围，用于实现振膜220的固定安装。
折环部223连接在振膜本体221和固定部222之间，如图1所示的实施例中，折环部223的外侧与固定部222的内侧连接，折环部223的内侧与振膜本体221的外侧连接。
请参照图1和图2，所述折环部223连接在所述振膜本体221和所述固定部222之间，所述折环部223包括第一折环2231和第二折环2232，所述第二折环2232和所述第一折环2231相邻设置，所述第二折环2232设有至少两个，所述第一折环2231朝所述振膜本体221的一侧凸起设置，所述第二折环2232朝所述振膜本体221的另一侧凸起设置。
如图1和图2所示的实施例中，振膜本体221位于中部，振膜本体221的外围为折环部223，折环部223的外围为固定部222，通过固定部222进行振膜220的安装，通过振膜本体221进行音圈210的安装。
该振膜220，由于折环包括第一折环2231和至少两个第二折环2232，第一折环2231的凸起朝向和第二折环2232的凸起朝向分别位于振膜本体221的相对两侧，如此设置，振膜220的有效辐射面积增加，并使得总的劲度系数和力电耦合系数更加匹配，从而降低失真。
请参照图1和图2，所述第一折环2231连接在所述第二折环2232和所述固定部222之间，所述第二折环2232设有两个，两个所述第二折环2232相邻设置并连接在所述第一折环2231和所述振膜本体221之间。
如图1和图2所示的实施例中，第一折环2231设有一个，第一折环2231设在振膜本体221的外围，且第一折环2231与固定部222紧邻设置。
如图1和图2所示的实施例中，第二折环2232设有两个，两个第二折环2232设在振膜本体221的外围，且靠近振膜本体221的第二折环2232与振膜本体221紧邻设置，两个第二折环2232相邻设置，且两个第二折环2232分别与振膜本体221和第一折环2231连接。
请参照图2，第一折环2231设有一个，第二折环2232设有两个，第一折环2231朝振膜本体221的上侧凸出设置，第二折环2232朝振膜本体221的下侧凸出设置。
如图2所示的实施例中，第二折环2232设有两个，两个第二折环2232均朝振膜本体221的下侧凸出设置，且两个第二折环2232紧邻设置，第一折环2231设有一个，第一折环2231位于第二折环2232的外围，且第一折环2231朝振膜本体221的上侧凸出设置。
请参照图2，所述第一折环2231的截面为半圆形，所述第二折环2232的截面为弧形，所述第一折环2231的截面半径与所述第二折环2232的截面半径相等。
如图2所示的实施例中，第一折环2231的截面为半圆形，第二折环2232有两个，两个第二折环2232的截面均为弧形。
可以理解的是：第二折环2232的弧形可以是圆形的一部分，因此，第二折环2232的截面半径与第一折环2231的节目半径相等或基本相当。
请参照图1和图2，所述振膜本体221呈平板状设置，所述折环部223呈环状绕设于所述振膜本体221的周缘，所述折环部223的靠近所述振膜本体221的一端与所述振膜本体221平滑过渡连接，所述折环部223的靠近所述固定部222的一端与所述固定部222平滑过渡连接，所述第一折环2231与所述第二折环2232平滑过渡连接。
图2所示的实施例，为振膜220的截面结构，由该截面结构可知，振膜220的中部为振膜本体221，振膜本体221的外围首先是第二折环2232，接着是另一个第二折环2232，再外围的是第一折环2231，最外围的是固定部222。
如图2所示，可以理解的是：
第一折环2231朝振膜本体221的上侧凸出设置，第一折环2231的外边缘与固定部222的内边缘平滑过渡连接，第一折环2231的内边缘与外侧的第二折环2232的外边缘平滑过渡连接；
两个第二折环2232均朝振膜本体221的下侧凸出设置，两个第二折环2232通过边缘平滑过渡连接在一起，外侧的第二折环2232的外边缘与第一折环2231的内边缘平滑过渡连接，内侧的第二折环2232的外边缘与振膜本体221的外边缘平滑过渡连接固定。
请参照图1，所述振膜本体221呈矩形设置，所述振膜本体221的拐角位置呈圆弧过渡，所述第一折环2231和所述第二折环2232中的一个与所述振膜本体221平滑过渡连接，另一个与所述固定部222平滑过渡连接。
如图1所示的实施例中，振膜本体221大致呈矩形设置，固定部222大致呈环状的矩形设置，以与振膜本体221进行对应，第一折环2231和第二折环2232也均为大致呈环状的矩形设置，以设在振膜本体221和固定部222之间。
请参照图1和图2，所述折环部223还包括连接相邻的两个所述第二折环2232的连接部2233，所述连接部2233与所述第二折环2232均位于所述振膜本体221的同一侧。
请参照图2，连接相邻的两个所述第二折环2232的连接部与所述第二折环2232的位置均位于所述振膜本体221的同一侧。
如图2所示的实施例中，第二折环2232设有两个，两个第二折环2232之间的连接部低于振膜本体221的水平面，也即，两个第二折环2232之间的连接部和第二折环2232的位置均在振膜本体221的下侧。
请参照图3和图4，提供的是采用前述实施例一的振膜220的发声单体，该发声单体包括磁路系统100和振动系统200。其中：
所述磁路系统100包括主磁体110和副磁体，所述副磁体设在所述主磁体110的外周，所述副磁体和所述主磁体110之间呈间隔设置并形成磁间隙130。
所述振动系统200位于所述磁路系统100的一侧，所述振动系统200包括音圈210和前述的振膜220，所述音圈210与所述振膜本体221固定，所述音圈210的靠近所述磁路系统100的一端伸入所述磁间隙130的内部。
如图3和图4所示的实施例中，磁路系统100包括中部的主磁体110和副磁体，副磁体设在主磁体110的外周，从而使得主磁体110和副磁体之间形成磁间隙130。
如图3和图4所示的实施例中，振动系统200包括音圈210和振膜220，振膜220通过固定部222固定在磁路系统100的上方，振膜220的振膜本体221下方固定音圈210，音圈210的下端伸入至磁路系统100的磁间隙130内。
请参照图3和图4，所述副磁体包括至少两个副磁单元121，至少两个所述副磁单元121呈间隔设置并环绕在所述主磁体110的外周。
如图3和图4所示的实施例中，副磁单元121环绕设在主磁体110的外周，副磁单元121和主磁体110之间呈间隔设置，该间隔形成磁间隙130，以使音圈210的靠近磁路系统100的一端伸入。
可选地，副磁单元121可以是两个，如图3和图4所示的实施例中，主磁体110的左侧设有一个副磁单元121，主磁体110的右侧也设有一个副磁单元121，副磁单元121和主磁体110之间呈间隔设置，以整体形成环状的磁间隙130，从而使磁间隙130与音圈210对应。
当然，副磁单元121也可以是三个或四个，以环绕设在主磁体110的外周，形成磁间隙130。
具体地，主磁体110可以是正方体或长方体，副磁单元121也可以是正方体或长方体，副磁单元121设在主磁体110的外周，从而形成磁间隙130。
该发声单体，由于振动系统200中的振膜采用的是前述任一个技术方案所述的振膜200，通过改变振膜200的有效辐射面积，使得总的劲度系数kms(x)与力电耦合系数Bl(x)更加匹配，从而降低了发声单体发出声音的失真度。
实施例二：
实施例二与实施例一的主要区别在于第一折环2231和第二折环2232，具体地：
请参照图5和图6，在该实施例中，所述第一折环2231连接在所述第二折环2232和所述振膜本体221之间，所述第二折环2232设有两个，两个所述第二折环2232相邻设置并连接在所述第一折环2231和所述固定部222之间。
如图4和图5所示的实施例中，第一折环2231设有一个，第二折环2232设有两个，与实施例一所不同的是，第一折环2231设在第二折环2232和振膜本体221之间，而第二折环2232设在第一折环2231和固定部222之间。
请参照图5，第一折环2231朝向振膜本体221的下侧凸出设置，两个第二折环2232均朝向振膜本体221的上侧凸出设置。
如图5所示的实施例中，第一折环2231设有一个，第二折环2232设有两个，第一折环2231的内边缘与振膜本体221的外边缘平滑过渡连接固定，两个第二折环2232通过连接部2233平滑过渡连接，内侧的第二折环2232的内边缘与第一折环2231的外边缘平滑过渡连接固定，外侧的第二折环2232的外边缘与固定部222的内边缘平滑过渡连接固定。
请参照图7，为采用实施例二的振膜220的一种发声单体，该发声单体包括磁路系统100和振动系统200。其中：
磁路系统100，所述磁路系统100包括主磁体110和副磁体，所述副磁体设在所述主磁体110的外周，所述副磁体和所述主磁体110之间呈间隔设置并形成磁间隙130。
振动系统200，所述振动系统200位于所述磁路系统100的一侧，所述振动系统200包括音圈210和如实施例二所述的振膜220，所述音圈210与所述振膜本体221固定，所述音圈210的靠近磁路系统的一端伸入所述磁间隙130的内部。
该发声单体，振动系统200中的振膜220采用前述的振膜220，使得振膜220的有效辐射面积增加，进而使总的劲度系数和力电耦合系数更加匹配，从而降低失真。
可以理解的是：
请参照图6，该采用该振膜220的发声单体中，所述副磁体包括至少两个副磁单元121，至少两个所述副磁单元121呈间隔设置并环绕在所述主磁体110的外周。
如图6所示，副磁单体可以是两个，两个副磁单元121设在主磁体110的左右两侧，两个副磁单元121和一个主磁体110配合形成磁间隙130，音圈210的下端伸入磁间隙130的内部。
在本实用新型的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本实用新型的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本实用新型中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本实用新型中的具体含义。
在本实用新型中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本实用新型的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对实用新型专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本实用新型构思的前提下，还可以做出若干变形和改进，这些都属于本实用新型的保护范围。因此，本实用新型专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种振膜，其特征在于，包括：
    振膜本体；
    固定部，所述固定部设在所述振膜本体的外围；及
    折环部，所述折环部连接在所述振膜本体和所述固定部之间，所述折环部包括第一折环和第二折环，所述第二折环和所述第一折环相邻设置，所述第二折环设有至少两个，所述第一折环朝所述振膜本体的一侧凸起设置，所述第二折环朝所述振膜本体的另一侧凸起设置。
  2. 根据权利要求1所述的振膜，其特征在于，所述第一折环连接在所述第二折环和所述固定部之间，所述第二折环设有两个，两个所述第二折环相邻设置并连接在所述第一折环和所述振膜本体之间。
  3. 根据权利要求1所述的振膜，其特征在于，所述第一折环连接在所述第二折环和所述振膜本体之间，所述第二折环设有两个，两个所述第二折环相邻设置并连接在所述第一折环和所述固定部之间。
  4. 根据权利要求1所述的振膜，其特征在于，所述第一折环的截面为半圆形，所述第二折环的截面为弧形，所述第一折环的截面半径与所述第二折环的截面半径相等。
  5. 根据权利要求1-4任一项所述的振膜，其特征在于，所述振膜本体呈平板状设置，所述折环部呈环状绕设于所述振膜本体的周缘，所述折环部的靠近所述振膜本体的一端与所述振膜本体平滑过渡连接，所述折环部的靠近所述固定部的一端与所述固定部平滑过渡连接，所述第一折环与所述第二折环平滑过渡连接。
  6. 根据权利要求5所述的振膜，其特征在于，所述振膜本体呈矩形设置，所述振膜本体的拐角位置呈圆弧过渡，所述第一折环和所述第二折环中的一个与所述振膜本体平滑过渡连接，另一个与所述固定部平滑过渡连接。
  7. 根据权利要求5所述的振膜，其特征在于，所述折环部还包括连接相邻的两个所述第二折环的连接部，所述连接部与所述第二折环均位于所述振膜本体的同一侧。
  8. 根据权利要求5所述的振膜，其特征在于，所述固定部呈平板状设置，所述固定部与所述振膜本体处于同一水平面上。
  9. 一种发声单体，其特征在于，包括：
    磁路系统，所述磁路系统包括主磁体和副磁体，所述副磁体设在所述主磁体的外周，所述副磁体和所述主磁体之间呈间隔设置并形成磁间隙；及
    振动系统，所述振动系统位于所述磁路系统的一侧，所述振动系统包括音圈和如权利要求1-8任一项所述的振膜，所述音圈与所述振膜本体固定，所述音圈靠近所述磁路系统的一端伸入所述磁间隙的内部。
  10. 根据权利要求9所述的发声单体，其特征在于，所述副磁体包括至少两个副磁单元，至少两个所述副磁单元呈间隔设置并环绕在所述主磁体的外周。
PCT/CN2020/122347 2020-09-29 2020-10-21 振膜及发声单体 Ceased WO2022067906A1 (zh)

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Citations (4)

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US20090016563A1 (en) * 2007-07-14 2009-01-15 Aurasound, Inc. Micro-speaker
CN106101941A (zh) * 2016-08-23 2016-11-09 深圳市音沃仕科技有限公司 一种振膜
CN206061116U (zh) * 2016-08-23 2017-03-29 深圳市音沃仕科技有限公司 一种振膜
CN207200976U (zh) * 2017-08-31 2018-04-06 歌尔科技有限公司 用于发声装置的振动组件以及发声装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090016563A1 (en) * 2007-07-14 2009-01-15 Aurasound, Inc. Micro-speaker
CN106101941A (zh) * 2016-08-23 2016-11-09 深圳市音沃仕科技有限公司 一种振膜
CN206061116U (zh) * 2016-08-23 2017-03-29 深圳市音沃仕科技有限公司 一种振膜
CN207200976U (zh) * 2017-08-31 2018-04-06 歌尔科技有限公司 用于发声装置的振动组件以及发声装置

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