WO2015109698A1 - 扬声器 - Google Patents

扬声器 Download PDF

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Publication number
WO2015109698A1
WO2015109698A1 PCT/CN2014/078101 CN2014078101W WO2015109698A1 WO 2015109698 A1 WO2015109698 A1 WO 2015109698A1 CN 2014078101 W CN2014078101 W CN 2014078101W WO 2015109698 A1 WO2015109698 A1 WO 2015109698A1
Authority
WO
WIPO (PCT)
Prior art keywords
diaphragm
speaker
diaphragms
connecting rod
cavity
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/CN2014/078101
Other languages
English (en)
French (fr)
Inventor
江超
杨健斌
李志�
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.)
Goertek Inc
Original Assignee
Goertek Inc
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 Goertek Inc filed Critical Goertek Inc
Priority to KR1020167022215A priority Critical patent/KR101792966B1/ko
Priority to US15/114,329 priority patent/US9838797B2/en
Publication of WO2015109698A1 publication Critical patent/WO2015109698A1/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers
    • 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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • 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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • 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
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/026—Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice

Definitions

  • the present invention relates to the field of acoustics and, more particularly, to a speaker. Background technique
  • the woofer As a sounding device with good bass characteristics, the woofer is widely used in daily life.
  • the area of the diaphragm and the volume of the entire product are large, such as in thin electronic devices such as LCD TVs and notebook computers, which are required to guarantee the performance of the speakers. Minimize the size in one direction to accommodate the needs of thin electronic devices.
  • a plurality of diaphragms are usually used in one speaker, and the diaphragms are connected by a connecting rod to optimize the electroacoustic conversion.
  • the connecting rod must penetrate the diaphragm to achieve the connection between the diaphragms, which inevitably causes air leakage. Once the air leaks, it will cause sound distortion or noise, such as noise, which will further affect the sounding effect of the speaker. Summary of the invention
  • an object of the present invention is to provide a speaker to solve the problem of leakage of the diaphragm, and at the same time, it is possible to reduce the resonance frequency of the speaker, improve the sensitivity, and reduce the difficulty in manufacturing the entire speaker.
  • the speaker provided by the invention comprises at least four diaphragms, an inner connecting rod, an outer connecting rod and a cavity sealing shell; wherein the spaced diaphragms respectively form a group of diaphragms, and the two groups of diaphragms formed by all the diaphragms are mutually Relative movement; a connection point is respectively arranged on the DOME of each diaphragm, and the inner connecting rod is connected to the diaphragm through a connection point on the DOME, and the inner connecting rods respectively connected to the two sets of diaphragms respectively pass different
  • the outer connecting rod is connected; the chamber between the adjacent diaphragms forms a speaker, the spaced chambers together form a front sound chamber of the speaker, and the chamber adjacent to the front sound chamber forms a rear sound chamber of the speaker, and the cavity sealing shell will The front cavity/rear cavity is sealed to separate the front and rear sound chambers of the speaker.
  • the speaker further comprises a driving source; the diaphragm is 4 pieces, and the driving source is located at both ends of the speaker; A cavity sealing shell is disposed on the rear acoustic cavity.
  • the inner connecting rod comprises a short connecting rod and a long connecting rod, each diaphragm is connected with a set of short connecting rods or long connecting rods, wherein the short connecting rod and the long connecting rod are in the two sets of diaphragms
  • the distributions are interlaced.
  • the inner connecting rod and the outer connecting rod are two groups.
  • the short connecting rod is connected in the 0 ⁇ 1/4 area of the long axis direction of the DOME of the diaphragm
  • the long connecting rod is connected in the 1/4 ⁇ 1/2 area of the long axis direction of the DOME of the diaphragm.
  • the spaced diaphragms are connected by an external connecting rod to form a group of diaphragms
  • the driving source comprises a magnetic circuit
  • the magnetic circuit is connected to a diaphragm adjacent thereto to drive the movement of a group of diaphragms in which the diaphragm is located.
  • the driving source is a moving coil driving source.
  • the driving source is electrically connected to an external circuit through a flexible printed wiring board (FPCB).
  • FPCB flexible printed wiring board
  • a centering piece is disposed below the diaphragm away from the driving source.
  • the diaphragm is a long diaphragm.
  • FIG. 1 is a cross-sectional structural view showing a diaphragm of a speaker according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a centering piece of a speaker according to an embodiment of the present invention.
  • the reference numerals include: magnetic circuit 1, FPCB 2, diaphragm 3, outer connecting rod 4, inner connecting rod 5, first outer casing 6, second outer casing 7, cavity sealing casing 8, centering piece 10.
  • magnetic circuit 1 FPCB 2, diaphragm 3, outer connecting rod 4, inner connecting rod 5, first outer casing 6, second outer casing 7, cavity sealing casing 8, centering piece 10.
  • the woofer requires a large diaphragm area.
  • the speaker of the present invention allows the diaphragm to pass through the inner connecting rod from the viewpoint of arranging a plurality of diaphragms.
  • the outer connecting rod is connected without penetrating itself to solve the air leakage problem and improve the acoustic performance of the speaker.
  • Fig. 1 shows a sectional structure when a diaphragm of a speaker according to the present invention has four sheets.
  • the speaker of the present invention comprises: a diaphragm 3, an FPCB 2, an inner connecting rod 5, an outer connecting rod 4, a magnetic circuit 1 and a cavity sealing case 8. among them,
  • the diaphragm includes a DOME and a folding ring.
  • the diaphragm 3 of the elongated structure is distributed in parallel with each other, and the diaphragms are separated to form a group of diaphragms. All the diaphragms form two sets of diaphragms, and the relative motion between the two groups of diaphragms is from bottom to top.
  • the first diaphragm, the second diaphragm, the third diaphragm, and the fourth diaphragm are respectively provided with connection points on the DOME of each diaphragm, and the connecting rod and the vibration of the inner connecting rod 5 through the long axis direction of the DOME
  • the membranes 3 are connected, and the inner connecting rods 5 respectively connected to the two sets of diaphragms are connected by different outer connecting rods 4, respectively.
  • the inner connecting rods 5 connected to the first diaphragm and the third diaphragm are connected by an outer connecting rod 4, and the inner connecting rod 5 connected to the second diaphragm and the fourth diaphragm They are connected by different outer connecting rods 4.
  • the specific shape of the diaphragm of the elongated structure is not fixed and can be designed and used according to specific needs.
  • a chamber of the speaker is formed between adjacent diaphragms, the spaced chambers together form a front sound chamber of the speaker, and the chamber adjacent to the front sound chamber forms a rear sound chamber of the speaker, and the chamber sealing shell seals the front sound chamber/rear sound chamber , to separate the front and rear chambers of the speaker.
  • the cavity sealing shell is disposed on the chamber formed by the diaphragm in the middle.
  • the chamber located in the middle is the rear sound chamber.
  • the speaker provided by the invention further comprises a driving source, which can be a moving coil driving source,
  • a driving source which can be a moving coil driving source
  • the working principle of the circle is: A closed coil is in a magnetic field, and when the magnetic flux passing through it changes, a current is generated, and vice versa. The current is passed through the coil to generate a magnetic field, and the magnetic field interacts with the permanent magnet material at the bottom to push the vibration of the diaphragm, which produces sound.
  • connection point on a diaphragm 3 is disposed on the long axis of the DOME of the diaphragm, and the diaphragm 3 located at the odd position is connected to the inner connecting rod 5 through the connection point, and then the inner connecting rod 5 is connected All the diaphragms 3 of the odd digits are connected by the outer connecting rod 4 to form a first group of diaphragms; wherein the inner connecting rod 5 comprises a short connecting rod and a long connecting rod, the short connecting rod and the long connecting rod are in the first group of diaphragms The distributions in the middle are intertwined.
  • connection point on the diaphragm is disposed in the long axis direction of the DOME of the diaphragm, and there may be two or one.
  • the installation of the inner connecting rod and the outer connecting rod is symmetrical.
  • Each diaphragm is connected to an inner connecting rod to save raw materials and reduce the weight of the speaker.
  • the diaphragm 3 located at an even position is connected to the inner connecting rod 5 through a connection point, and then all the diaphragms 3 in the even position to which the inner connecting rod 5 is connected are connected through the outer connecting rod 4 to form a second group of vibrations. a film; wherein the distribution of the long connecting rod and the short connecting rod of the inner connecting rod 5 in the second group of diaphragms are mutually staggered.
  • the working principle of the speaker mainly relies on the vibration of the diaphragm 3 to generate sound, and the diaphragm 3 has some non-piston vibration modes when vibrating, placing the connecting rod at different positions of the DOME of the diaphragm can effectively suppress the oscillation of the diaphragm. Mode and bending vibration mode.
  • the number of pairs of the inner connecting rods 5 coincides with the number of the diaphragms 3.
  • the number of inner connecting rods 5 is six.
  • the outer connecting rods 4 also appear in pairs, that is, the number of the outer connecting rods 4 is two.
  • the number of groups of the diaphragm 3 is two groups in accordance with the parity of the diaphragm, the number of the outer connecting rods 4 is also two.
  • the number of inner connecting rods is determined according to the number of diaphragms, and the outer connecting rods are a group, and the inner connecting rods connected to the diaphragms of different groups are respectively connected.
  • the outer connecting rod 4 Since the outer connecting rod 4 is used to connect the front and rear chambers of the speaker, it is necessary to add a cavity sealing shell 8 which is located in the middle chamber, in detail, the outer connecting rod 4 and the speaker
  • the inner connecting rod 5 of the front cavity is connected to the position of the cavity sealing case 8 to make the front of the speaker, The back cavity is separated.
  • the centering piece 10 is disposed below the diaphragm away from the driving source, and the centering piece 10 has two, respectively, two pieces in each group of diaphragms away from the driving source. Below the diaphragm, the polarization of the speaker can be more effectively suppressed than when the centering support 10 is disposed below the diaphragm of the drive source.
  • the driving source includes a magnetic circuit and a voice coil, wherein the magnetic circuit 1 appears in groups and is at least one set, respectively disposed below the first diaphragm and above the fourth diaphragm, respectively
  • the voice coil bobbin is connected to the DOME of the two adjacent diaphragms 3.
  • the FPCB 2 for connecting the voice coil lead and the outer casing in the embodiment of the speaker of the present invention has an elongated shape, and is provided with a circuit at the end thereof, and is connected to an external circuit, and one end of the FPCB 2 is provided with a disk, a voice coil.
  • the lead is bonded to the DOME of the diaphragm 3 close to the magnetic circuit 1, and is connected to one end of the FPCB 2 through a disk, and the other end of the FPCB 2 is connected to the related casing, thereby being connected to an external circuit.
  • Both ends of the FPCB 2 are bent in an arc shape to a position parallel to the mounting plane. This structure of the FPCB 2 can make full use of the internal space of the woofer and avoid the disconnection caused by the pulling of the lead during vibration of the diaphragm.
  • the connected diaphragm moves through the magnetic circuit at one end of the speaker, because the DOME of the diaphragm is connected to the inner connecting rod through the connection point provided thereon, and the inner connecting rod is connected with the corresponding outer connecting rod, so that the diaphragm is connected with the diaphragm
  • the diaphragms of the interval also generate motion, and the motion direction is the same, and the amplitude of the motion is equal; similarly, the magnetic circuit at the other end of the speaker also drives the diaphragm movement adjacent thereto, through the connection of the inner connecting rod and the outer connecting rod , the multiple diaphragms separated from each other also produce motion, and the motion direction is the same, the amplitude of the motion is equal.
  • the motion between adjacent diaphragms is relative, which makes the sound effect, the resonant frequency of the speaker is also reduced, and the bass effect is better.
  • the speaker embodiment of the present invention there are four diaphragms 3, and the four diaphragms are defined as the first diaphragm, the second diaphragm, the third diaphragm, and the fourth diaphragm since the downward direction.
  • the first diaphragm and the third diaphragm are connected by an outer connecting rod 4
  • the second diaphragm and the fourth diaphragm are connected by another external connecting rod
  • the inner connecting rod 5 connected to the diaphragm 3 connected to the same outer connecting rod 4 is long
  • the short-phase arrangement that is, when the inner connecting rod 4 connected to the first diaphragm is a short connecting rod, the inner connecting rod 4 connected to the third diaphragm is a long connecting rod.
  • the short connecting rod connected to the first diaphragm is connected in a region of 0 to 1/4 of the long axis direction of the DOME 2 of the first diaphragm
  • the long connecting rod connected to the second diaphragm is connected to the second vibrating portion. In the region of 1/4 to 1/2 of the long axis direction of the DOME 2 of the film, the same is true for the third diaphragm and the fourth diaphragm.
  • the inner connecting rods are in different positions to facilitate the suppression of the oscillation mode of the diaphragm and the occurrence of the bending vibration mode.
  • a plurality of diaphragms 3 may be used in one speaker.
  • the number of diaphragms may be an even number or an odd number. In the above embodiment, only four are used. The example is explained. Similarly, more diaphragms can be used in one speaker, increasing the effective radiation area, reducing the resonant frequency of the speaker, and increasing the sensitivity of the speaker.
  • the first outer casing 6 is in the shape of a racetrack, and a 180 degree opening and a 90 degree opening are respectively arranged on the arcs at both ends
  • the second outer casing 7 is also in the shape of a racetrack, and is at one end.
  • a 90 degree opening is provided on the curved shape.
  • the order of the three outer casings during installation is: first outer casing 6, second outer casing 7, and first outer casing 6.
  • the 180 degree opening and the 90 degree opening of the pair of first outer casings 6 respectively correspond to each other, the 90 degree opening of the second outer casing 7 and the 90 degree opening position of the first outer casing 6 are mutually displaced, and the second outer casing 7 forms a speaker.
  • the small rear sound chamber, a pair of first outer casings 6 form a front sound chamber of the speaker, the first outer casing 6 corresponding to the opening position, and sounded outward through the two 180 degree openings.
  • the spaced chambers that is, the chamber formed by the first outer casing 6 constitute a front acoustic chamber, and the second outer casing 7 forms a rear acoustic chamber.
  • a cavity is installed at an outer position of the outer connecting rod 4 on one side.
  • the body seals the shell 8.
  • the installation of the rear chamber housing causes the entire speaker to form a large rear cavity. Due to the use of the outer connecting rod 4, the front cavity of the speaker and the large rear cavity are communicated, so that the cavity sealing case 8 is installed to separate the front and rear chambers. .
  • centering pieces 10 are respectively disposed under the second diaphragm and the third diaphragm, and FIG. 2 shows the structure of the centering piece according to an embodiment of the present invention. .
  • the centering piece 10 is connected to the DOME 2 of the diaphragm 3 above it, and since the second diaphragm and the third diaphragm are farther away from the driving magnetic circuit than the third diaphragm and the third diaphragm, The effect of suppressing the polarization of the speaker is more pronounced.
  • the magnetic circuit 1 as the driving source of the present embodiment is a group, and is fixed by a mounting hole provided in the outer casing, and each magnetic circuit 1 is connected to the DOME 2 of the adjacent diaphragm through the voice coil bobbin, that is, a group of magnetic waves.
  • the road 1 is connected to the DOME of the first diaphragm and the fourth diaphragm, respectively.
  • the FPCB is used to electrically connect the driving unit and the external circuit. Compared with the conventional wire connection method, the FPCB can simplify the manufacturing process, save the internal space of the speaker, and improve the stability of the speaker.
  • the magnetic circuit 1 can be provided in multiple groups, and the series and parallel connection of different types are used together as a driving source, which can effectively suppress the polarization of the diaphragm 3 and improve the sensitivity, and at the same time, the volume of the magnet in the magnetic circuit is reduced, and the cost is also reduced. Will decrease.
  • the speaker provided by the present invention does not need to pass through the diaphragm, and there is no problem of leakage of sound, the acoustic performance is more excellent, and the manufacturing difficulty is reduced.
  • the mounting portion of the centering piece is far from the driving source, and the polarization of the speaker can be more effectively suppressed.

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

Abstract

本发明提供一种扬声器，包括至少四片振膜、内连接杆、外连接杆和腔体密封壳；其中，相间隔的振膜分别形成一组振膜，两组振膜彼此相对的运动；在各振膜的刚性中间部（DOME）上分别设置有连接点，内连接杆通过DOME上的连接点与振膜相连，分别与所述两组振膜相连接的内连接杆之间分别通过不同的外连接杆连接；相邻的振膜之间形成扬声器的腔室，相间隔的腔室共同形成扬声器的前声腔，与前声腔相邻的腔室形成扬声器的后声腔，腔体密封壳将前声腔/后声腔密封，使扬声器的前、后声腔分离。上述扬声器能够保证扬声器的连接杆不穿过振膜，从而不存在漏气的问题，声学性能更为优良。

Description

扬声器
技术领域
本发明涉及声学领域， 更为具体地， 涉及一种扬声器。 背景技术
低音扬声器作为具有良好低音特质的发声器件， 在日常生活中应用日益 广泛。 在产品设计中， 因需要在低频段辐射足够的声功率， 振膜的面积和整 个产品的体积较大， 如应用在液晶电视、 笔记本电脑等薄型电子装置中， 要 求在保障扬声器性能的基础上尽量减小某一方向的尺寸， 以适应薄型电子装 置的需要。
为了降低扬声器的谐振频率， 提高扬声器的灵敏度， 通常在一个扬声器 中采用多个振膜， 各振膜之间通过连接杆连接， 以实现电声转换的最优化。 然而， 在现有的扬声器制作过程中， 连接杆都必须穿透振膜才能够实现各振 膜之间的连接， 这必然会造成空气的泄漏。 一旦空气泄漏便会造成声音失真 或者噪声等不良音质出现， 进一步影响到扬声器的发声效果。 发明内容
鉴于上述问题， 本发明的目的是提供一种扬声器以解决振膜漏气的问题， 同时能够减小扬声器的谐振频率， 提高灵敏度， 降低整个扬声器的制作难度。
本发明提供的扬声器， 包括至少 4片振膜、 内连接杆、 外连接杆和腔体 密封壳； 其中， 相间隔的振膜分别形成一组振膜， 所有振膜形成的两组振膜 彼此相对的运动； 在各振膜的 DOME 上分别设置有连接点， 内连接杆通过 DOME上的连接点与振膜相连， 分别与所述两组振膜相连接的内连接杆之间 分别通过不同的外连接杆连接； 相邻的振膜之间形成扬声器的腔室， 相间隔 的腔室共同形成扬声器的前声腔， 与前声腔相邻的腔室形成扬声器的后声腔， 腔体密封壳将前声腔 /后声腔密封， 使扬声器的前、 后声腔分离。
其中， 扬声器还包括驱动源； 振膜为 4片， 驱动源位于扬声器的两端； 腔体密封壳设置在所述后声腔上。
其中， 内连接杆包括短连接杆和长连接杆， 每一片振膜与一组短连接杆 或者长连接杆连接， 所述短连接杆和所述长连接杆在所述两组振膜中的分布 均相互交错。
其中， 内连接杆和外连接杆均为两组。
其中， 短连接杆连接在振膜的 DOME长轴方向的 0~1/4区域内， 长连接 杆连接在振膜的 DOME长轴方向的 1/4~1/2区域内。
其中， 相间隔的振膜通过外连接杆相连形成一组振膜， 驱动源包括磁路， 磁路通过与其相邻的一片振膜相连驱动该振膜所在的一组振膜的运动。
其中， 驱动源为动圈式驱动源。
其中， 驱动源通过柔性印刷线路板 （FPCB ) 与外部电路电连接。
其中， 在远离驱动源的振膜的下方设置有定心支片。
其中， 振膜为长形振膜。
利用上述根据本发明的扬声器， 可以保证扬声器的连接杆不穿过振膜， 从而不存在漏气的问题， 声学性能更为优良， 此外在远离驱动源的振膜下方 设置定心支片能够更加有效的抑制扬声器的偏振。 为了实现上述以及相关目的， 本发明的一个或多个方面包括后面将详细 说明并在权利要求中特别指出的特征。 下面的说明以及附图详细说明了本发 明的某些示例性方面。 然而， 这些方面指示的仅仅是可使用本发明的原理的 各种方式中的一些方式。 此外， 本发明旨在包括所有这些方面以及它们的等 同物。 附图说明
通过参考以下结合附图的说明及权利要求书的内容， 并且随着对本发明 的更全面理解， 本发明的其它目的及结果将更加明白及易于理解。 在附图中： 图 1为根据本发明实施例的扬声器的振膜为 4片时的剖面结构示意图； 图 2为根据本发明实施例的扬声器的定心支片的结构示意图。
其中的附图标记包括： 磁路 1、 FPCB 2、 振膜 3、 外连接杆 4、 内连接杆 5、 第一外壳 6、 第二外壳 7、 腔体密封壳 8、 定心支片 10。 在所有附图中相同的标号指示相似或相应的特征或功能。 具体实施方式
在下面的描述中， 出于说明的目的， 为了提供对一个或多个实施例的全 面理解， 阐述了许多具体细节。 然而， 很明显， 也可以在没有这些具体细节 的情况下实现这些实施例。 以下将结合附图对本发明的具体实施例进行详细 描述。
在下面的描述中， 处于说明的目的， 在下面对本发明具体实施方式的表 述中， 将振膜中心的刚性部位 （刚性中间部） 统一表述为 "DOME"—词。
低音扬声器需要较大的振膜面积， 为了在限制音圈和磁铁尺寸的基础上 提供较大的振膜面积， 本发明的扬声器从布置多个振膜的角度出发， 使振膜 通过内连接杆和外连接杆在不穿透自身的情况下相连接， 解决漏气问题， 提 高扬声器的声学性能。
图 1示出了根据本发明的扬声器的振膜为 4片时的剖面结构。
如图 1所示， 本发明的扬声器包括： 振膜 3、 FPCB 2、 内连接杆 5、 外连 接杆 4、 磁路 1和腔体密封壳 8。 其中，
振膜包括 DOME和折环部。 长形结构的振膜 3为 4片， 互相平行分布， 相间隔的振膜分别形成一组振膜， 所有振膜共形成两组振膜， 两组振膜之间 相对的运动， 由下至上分别为第一振膜、 第二振膜、 第三振膜和第四振膜， 各片振膜的 DOME上分别设置有连接点，内连接杆 5通过 DOME长轴方向上 的连接点与振膜 3相连， 分别与两组振膜相连接的内连接杆 5之间分别通过 不同的外连接杆 4连接。 详细而言， 与第一振膜、 第三振膜相连接的内连接 杆 5之间通过一根外连接杆 4连接， 与第二振膜、 第四振膜相连接的内连接 杆 5之间通过不同的外连接杆 4连接。 需要说明的， 长形结构的振膜的具体 形状不是固定的， 可以根据具体的需要进行设计和使用。
相邻的振膜之间形成扬声器的腔室， 相间隔的腔室共同形成扬声器的前 声腔， 与前声腔相邻的腔室形成扬声器的后声腔， 腔体密封壳将前声腔 /后声 腔密封， 使扬声器的前、 后腔分离。 其中， 腔体密封壳设置在振膜形成的位 于中间的腔室上。 优选地， 当振膜为 4片时， 位于中间的腔室为后声腔。
本发明提供的扬声器还包括驱动源， 该驱动源可以为动圈式驱动源， 动 圈的工作原理为： 一个闭合线圈在磁场中， 当通过它的磁通量发生变化时， 就会有电流产生， 反之亦然。 利用电流流过线圈， 产生磁场， 而磁场和位于 底部的永磁材料相互作用， 推动振膜的振动， 就会产生声音。
具体地， 位于一片振膜 3上的连接点设置在振膜的 DOME长轴上， 将位 于奇数位的振膜 3通过连接点与内连接杆 5连接， 然后将连接有内连接杆 5 的位于奇数位的所有振膜 3通过外连接杆 4进行连接， 形成第一组振膜； 其 中， 内连接杆 5 包括短连接杆和长连接杆， 短连接杆和长连接杆在第一组振 膜中的分布相互交错。
其中， 振膜上的连接点设置在振膜的 DOME的长轴方向， 可以有两个， 也可以有一个。 在有两个连接点的情况下， 内连接杆及外连接杆的安装是对 称的， 此外， 也可以在保证振膜正常工作的情况下， 设置一个连接点， 即单 边使用连接杆的情况， 每片振膜与一个内连接杆连接， 节省原材料， 减轻扬 声器重量。
此外， 将位于偶数位的振膜 3通过连接点与内连接杆 5连接， 然后将连 接有内连接杆 5的位于偶数位的所有振膜 3通过外连接杆 4进行连接， 形成 第二组振膜； 其中， 内连接杆 5 的长连接杆和短连接杆在第二组振膜中的分 布相互交错。
由于扬声器的工作原理主要依靠振膜 3的振动产生声音， 而振膜 3在振 动时会有一些非活塞振动模态， 将连接杆放置在振膜的 DOME的不同位置能 够有效抑制振膜的摆动模式及弯曲振动模式。
需要说明的是， 内连接杆 5在成对出现的情况下， 内连接杆 5的对数与 振膜 3的数量一致。 例如， 在一个扬声器中采用了六个振膜 3， 那么内连接杆 5的数量则为六组。 同时， 外连接杆 4也成对出现， 即外连接杆 4的数量为两 组。 在本发明中， 由于按照振膜的奇偶数位分组， 因此振膜 3的组数为两组， 那么外连接杆 4 的数量也为两组。 在使用单边杆的情况下， 内连接杆的数量 根据振膜的片数决定， 外连接杆为一组， 分别连接与不同组别的振膜相连接 的内连接杆。
由于采用了外连接杆 4， 使扬声器的前、 后腔相通， 所以必须添加一个腔 体密封壳 8， 腔体密封壳 8位于中间的腔室上， 详细而言， 在外连接杆 4与位 于扬声器前腔的内连接杆 5相连接的位置安装腔体密封壳 8， 使扬声器的前、 后腔进行分离。
此外， 为了减小扬声器的振膜偏振幅度， 在远离驱动源的振膜下方设置 定心支片 10， 该定心支片 10共有两个， 分别位于每组振膜中远离驱动源的两 片振膜的下方， 相比将定心支片 10设置在靠近驱动源的振膜的下方能够更加 有效的抑制扬声器的偏振。
本发明的扬声器的具体实施例中， 驱动源包括磁路和音圈， 其中磁路 1 成组出现且至少为一组， 分别设置在第一振膜的下方和第四振膜的上方， 分 别通过音圈骨架与相邻的两片振膜 3的 DOME相连接， 需要说明的是， 在扬 声器内部空间允许的情况下， 可以设置多组磁路 1 共同驱动， 能有效抑制振 膜的偏振， 提高灵敏度， 同时， 磁路中磁铁的体积减小， 成本也会降低。
本发明的扬声器的具体实施例中的用于连接音圈引线和外壳的 FPCB 2 为长条形， 在其端部设置有电路， 与外部电路连接， FPCB 2的一端设置有悍 盘，音圈引线粘结在靠近磁路 1的振膜 3的 DOME上，并通过悍盘与 FPCB 2 的一端连接， FPCB 2的另一端与相关外壳连接， 进而与外部电路连接。 FPCB 2的两端部呈弧形结构弯折至与安装平面平行的位置。 FPCB 2的这种结构可 以充分利用低音扬声器的内部空间， 并且避免了振膜振动过程中由于引线的 牵拉造成的断线。
在上述结构的基础上， 本发明的扬声器的工作原理简述如下：
通过扬声器一端的磁路驱动相连的振膜运动， 由于振膜的 DOME通过其 上设置的连接点与内连接杆相连接， 同时内连接杆与相应的外连接杆连接， 使得与该振膜相间隔的多个振膜也产生运动， 且运动方向相同， 运动的幅值 相等； 同理， 扬声器另一端的磁路也驱动与其相邻的振膜运动， 通过内连接 杆和外连接杆的连接， 使与之相隔的多个振膜也产生运动， 且运动方向相同， 运动的幅值相等。 相邻的各振膜之间的运动则是相对的， 从而起到发声效果， 扬声器的谐振频率也降低， 低音效果更好。
具体地， 本发明的扬声器具体实施例中有四片振膜 3， 自从下向上的方向 定义该四片振膜分别为第一振膜、 第二振膜、 第三振膜和第四振膜。 其中， 在四片振膜的一侧位置第一振膜和第三振膜通过一根外连接杆 4相连接， 第 二振膜和第四振膜通过另外一根外连接杆相连接， 相对应的另外一侧按照相 同的方式连接。 与连接在同一外连接杆 4上的振膜 3相连接的内连接杆 5长 短相间排列， 即在第一振膜连接的内连接杆 4为短连接杆时， 与第三振膜相 连接的内连接杆 4为长连接杆。 此外， 与第一振膜相连接的短连接杆连接在 第一振膜的 DOME 2长轴方向 0~1/4的区域内， 与第二振膜相连接的长连接 杆连接在第二振膜的 DOME 2长轴方向 1/4~1/2的区域内，对于第三振膜和第 四振膜情况相同。 内连接杆处于不同的位置有利于抑制振膜的摆动模式及弯 曲振动模式的发生。
为了降低扬声器的谐振频率， 提高扬声器的音质及灵敏度， 可以在一个 扬声器中使用多个振膜 3， 振膜数量可以为偶数个， 也可以为奇数个， 在上述 实施例中只以四个为例进行了说明， 同样地， 可以在一个扬声器中使用更多 的振膜， 增加有效的辐射面积， 降低扬声器的谐振频率， 提高扬声器的灵敏 度。
为确保扬声器的前后声腔相分离， 在本发明的一个具体实施例中， 需要 安装相配套使用的外壳。 其中， 在本发明的实施例中， 第一外壳 6为跑道形 状， 并分别在两端的弧上设置有一个 180度开口和一个 90度开口， 第二外壳 7也为跑道形状， 并在一端的弧形上设置设一个 90度开口。 安装过程中三个 外壳的顺序为： 第一外壳 6、 第二外壳 7、 第一外壳 6。 其中， 一对第一外壳 6的 180度开口和 90度开口分别相对应，第二外壳 7的 90度开口与第一外壳 6的 90度开口的位置相互错位， 第二外壳 7形成一个扬声器的小后声腔， 一 对第一外壳 6形成扬声器的前声腔， 第一外壳 6的开口位置相对应， 并通过 两个 180度的开口向外发声。
相间隔的腔室即第一外壳 6形成的腔室构成前声腔， 第二外壳 7形成后 声腔， 为了实现上述扬声器前、 后声腔的分离， 在一侧的外连接杆 4 的外侧 位置安装腔体密封壳 8。具体地， 后腔外壳的安装使整个扬声器形成一个大后 腔， 由于外连接杆 4 的使用， 使扬声器的前腔和大后腔相通， 所以要安装腔 体密封壳 8， 使前后腔相分离。
此外， 为了减小扬声器的振膜偏振幅度， 在第二振膜和第三振膜的下方 分别设置有定心支片 10， 图 2示出了根据本发明实施例的定心支片的结构。 如图 2所示， 定心支片 10与其上方的振膜 3的 DOME 2相连接， 由于第二振 膜和第三振膜相比第一振膜和第四振膜远离驱动磁路， 其抑制扬声器偏振的 效果会更加明显。 作为本实施例的驱动源的磁路 1 为一组， 通过设置在外壳上的安装孔进 行固定， 每个磁路 1通过音圈骨架与相邻的振膜的 DOME 2相连， 即一组磁 路 1 分别于第一振膜和第四振膜的 DOME连接。 在发明的实施例中， 采用 FPCB进行电连接驱动单元和外部电路， 相比较于普通的导线连接方式， 采用 FPCB能够使制造工艺简化， 节省扬声器的内部空间， 并且能够提高扬声器的 稳定性。
需要说明的是， 磁路 1 可以设置多组， 通过不同形式的串并联共同作为 驱动源使用， 能有效抑制振膜 3 的偏振， 提高灵敏度， 同时， 磁路中磁铁的 体积减小， 成本也会降低。
通过上述实施方式可以看出， 本发明提供的扬声器， 采用的内连接和外 连接杆不需要穿过振膜， 从而不存在漏声的问题， 声学性能更为优良， 且制 作难度降低。 此外， 定心支片的安装部位远离驱动源， 能够更加有效的抑制 扬声器的偏振。
如上参照附图以示例的方式描述根据本发明的扬声器。 但是， 本领域技 术人员应当理解， 对于上述本发明所提出的扬声器， 还可以在不脱离本发明 内容的基础上做出各种改进。 因此， 本发明的保护范围应当由所附的权利要 求书的内容确定。

Claims

权 利 要 求 书
1、一种扬声器， 包括至少 4片振膜、 内连接杆、外连接杆和腔体密封壳; 其中，
相间隔的振膜分别形成一组振膜， 所有振膜形成的两组振膜彼此相对的 运动； 在各振膜的刚性中间部上分别设置有连接点， 所述内连接杆通过所述 刚性中间部上的连接点与所述振膜相连， 分别与所述两组振膜相连接的内连 接杆之间分别通过不同的外连接杆连接；
相邻的振膜之间形成所述扬声器的腔室， 相间隔的腔室共同形成所述扬 声器的前声腔， 与所述前声腔相邻的腔室形成所述扬声器的后声腔， 所述腔 体密封壳将所述前声腔或所述后声腔密封， 使所述扬声器的所述前声腔与所 述后声腔分离。
2、 如权利要求 1所述扬声器， 其中， 所述扬声器还包括驱动源， 所述振 膜为 4片， 所述驱动源位于所述扬声器的两端， 所述腔体密封壳设置在所述 后声腔上。
3、 如权利要求 1或 2所述扬声器， 其中， 所述内连接杆包括短连接杆和 长连接杆， 每一片振膜与一组短连接杆或者长连接杆连接， 所述短连接杆和 所述长连接杆在所述两组振膜中的分布均相互交错。
4、 如权利要求 3所述的扬声器， 其中， 所述内连接杆和所述外连接杆均 为两组。
5、 如权利要求 4所述的扬声器， 其中， 所述短连接杆连接在振膜的刚性 中间部长轴方向的 0~1/4区域内，所述长连接杆连接在振膜的刚性中间部长轴 方向的 1/4~1/2区域内。
6、 如权利要求 2所述扬声器， 其中， 所述驱动源包括磁路， 所述磁路通 过与其相邻的一片振膜相连驱动该振膜所在的一组振膜的运动。
7、 如权利要求 2所述的扬声器， 其中， 所述驱动源为动圈式驱动源。
8、 如权利要求 7所述的扬声器， 其中， 所述驱动源通过柔性印刷线路板 与外部电路电连接。
9、 如权利要求 2所述的扬声器， 其中， 在远离所述驱动源的振膜的下方 设置有定心支片。
10、 如权利要求 1或 2所述的扬声器， 其中， 所述振膜为长形振膜。
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CN103813245A (zh) 2014-05-21
KR101792966B1 (ko) 2017-11-02
KR20160108510A (ko) 2016-09-19

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