WO2012009861A1 - 低音带通扬声器系统 - Google Patents

低音带通扬声器系统 Download PDF

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Publication number
WO2012009861A1
WO2012009861A1 PCT/CN2010/075432 CN2010075432W WO2012009861A1 WO 2012009861 A1 WO2012009861 A1 WO 2012009861A1 CN 2010075432 W CN2010075432 W CN 2010075432W WO 2012009861 A1 WO2012009861 A1 WO 2012009861A1
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WO
WIPO (PCT)
Prior art keywords
speaker
bass
units
cabinet
passive
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PCT/CN2010/075432
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English (en)
French (fr)
Inventor
郭军
陈文光
李书增
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丰达电机（香港）有限公司
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Application filed by 丰达电机（香港）有限公司 filed Critical 丰达电机（香港）有限公司
Priority to PCT/CN2010/075432 priority Critical patent/WO2012009861A1/zh
Publication of WO2012009861A1 publication Critical patent/WO2012009861A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers

Definitions

  • the present invention relates to a subwoofer speaker system that is compacted in an audio system that is embedded in a television receiver or the like or combined with a television receiver or the like and is used as a high-quality sound system, particularly in a low-range range.
  • Background technique :
  • the speaker system incorporated in a television receiver or the like has been promoted to be smaller in size in accordance with the size of a limited installation space.
  • the reproduction sound is also Gradually demand high sound quality.
  • the aperture of the speaker is also limited, so that the high sound quality of the low range is not fully developed.
  • an acoustic reflection member such as a duct is provided on a front baffle of the sealed case, due to the sound radiated toward the back of the speaker unit. A part of the radiation is radiated in line with the sound phase radiated to the front via the sound tube, and thus the bass reproduction range is broadened.
  • a speaker system is known in which a partition plate is used to divide a body portion into two chambers, and on one chamber side, two speaker units are mounted on the partition plate, in two chambers.
  • An acoustic duct is provided in the chamber, thereby acoustically constituting a series double resonant loop which can arbitrarily set the low-range characteristics by selectively combining the resonant frequencies of the respective sound conduits.
  • the number of resonance systems is two or less. Since the degree of freedom in design is small and the range of characteristics that can be set is limited, it is attempted to provide a speaker system that improves these aspects by a relatively simple structure (for example, Refer to Patent Document 1).
  • one of the front surface and the back surface of each of the plurality of speaker units is covered with a casing having a predetermined volume, and the other surface of the diaphragm is covered with one common casing of a predetermined volume, and the casing is covered by the casing.
  • Sound conduits with different resonant frequencies are respectively set, By constructing a plurality of resonant circuits as a whole, it is possible to obtain a speaker system having a frequency characteristic which is a sum of acoustic output signals radiated from all of the acoustic ducts.
  • a bass reflex speaker system having an acoustic duct that radiates sound from the back surface of the speaker unit to the outside after phase reversal
  • another scheme for obtaining a high sound quality capable of reproducing a particularly rich bass is proposed.
  • a part of the acoustic duct is formed by a metal plate, the volume of the sound duct is changed by changing its length and shape, and the speaker system can be changed by changing the resonance frequency of the low-range of the speaker cabinet brought by the sound duct
  • the low range characteristic is set to the desired characteristic.
  • the entire cabinet vibrates due to the reaction of the vibration, thereby causing mechanical vibration of the device of the built-in speaker system.
  • the reason for the sound or image quality is reduced.
  • a plurality of speaker units are mechanically coupled on the back side, and electrical connection is made such that the sum of vectors of mutual reaction vibrations when operating is zero, thereby reducing the vibration of the entire speaker system, and in each speaker unit
  • the front side is equipped with a built-in sound duct type or a sealed type box to attenuate the mid-high range components.
  • the ratio of the resonant frequency of the box to the sound tube is set to 1:1 to 1:3.
  • the sealed type set the volume ratio of the case to 1: 1 to 1: 3, thereby resonating the low range, thereby improving the bass characteristics.
  • Patent Document 1 Japanese Patent Laid-Open No. 3-22797
  • Patent Document 2 Japanese Patent Laid-Open No. 10-117311
  • Patent Document 3 Japanese Special Open 2010-81316 Summary of the invention:
  • Patent Document 1 and Patent Document 2 all have the following problems: Since the reaction vibration when the diaphragm of the speaker unit operates is caused to cause vibration of the entire speaker system, the sound characteristics are affected.
  • the speaker system disclosed in Patent Document 3 constitutes a solution to this problem. However, even if there is no problem in the electrical connection between the plurality of speaker units as one of the schemes, there is a space in the improvement of the low-range by attenuating the mid-high-range components by the built-in acoustic duct type or the sealed type cabinet. , size problems.
  • the sound conduit and the casing are used to reproduce the sound radiated from the front or the back of the speaker system to reproduce the low range, but it is necessary to have a sound conduit or a casing having a length several times the height direction of the speaker unit.
  • the size and shape are set to the size and shape set by adjusting the resonance frequency, so that the miniaturization of the speaker system is limited.
  • the use of such a sound duct becomes a cause of abnormal noise such as air noise, internal high-range reflected sound, and airflow sound, and it is difficult to improve the problem.
  • An object of the present invention is to solve these problems and to provide a bass band pass speaker system which can suppress a speaker system due to a reaction vibration of a diaphragm without using an acoustic duct such as a speaker system having a large size in a sound radiating system.
  • the overall vibration is further reduced in size compared to the conventional woofer system, and the bass characteristics can be further improved.
  • a bass band pass speaker system is characterized by having a rectangular parallelepiped having an upper surface, a lower surface, both side surfaces, and end faces at both ends of the upper surface, the lower surface, and both side surfaces.
  • the interior of the speaker cabinet is configured such that at least one pair of the first and second speaker units are opposed to each other in a front and opposite manner, and the first and second speaker units are completely accommodated inside the speaker cabinet, in the speaker cabinet There are multiple passive radiators in the middle.
  • each of the end faces is provided with a passive radiator, each of the passive radiators and each of the speaker units.
  • the back side is separately set in each speaker unit Passive radiators are also provided on the front side.
  • the upper surface and the lower portion of the central portion of the speaker cabinet are on the front side of each of the speaker units.
  • the surfaces are respectively provided with passive radiators.
  • the sound conduit extending from the upper surface to the lower surface thereof is provided at a central portion of the speaker cabinet
  • a passive radiator is separately disposed on the sound conduit separately from the front surface of each of the speaker units.
  • the speaker unit, the plurality of passive radiators, and the speaker are provided by the speaker cabinet.
  • the resonant frequency ratio of the multiple resonant circuits formed by the box is 1:1 ⁇ 1:5.
  • the front facing position of each of the speaker units is a position at which vibrations of the entire speaker unit are mutually absorbed.
  • the bass band pass speaker system allows at least one pair of speaker units to be relatively and completely accommodated in the speaker cabinet, and since a plurality of passive radiators are installed in the speaker cabinet, the passive radiators are disposed in the respective speakers. Resonance occurs at the low frequency of the unit radiation, so that the low range can be enhanced and radiated to the outside.
  • the speaker units absorb the vibration of the unit itself, it is possible to suppress and reduce the vibration of the entire speaker system, thereby enabling the speaker cabinet to be realized. It is miniaturized and the bass range is increased to obtain good bass characteristics.
  • FIG. 1 is a plan view of a bass band pass speaker system according to Embodiment 1 of the present invention
  • FIG. 2 is a longitudinal cross-sectional view taken along line A-A' of FIG. 1
  • Figure 3 is a side elevational view showing the bass band pass speaker system according to Embodiment 1 of the present invention
  • Figure 4 is a longitudinal sectional view showing the internal structure of a subwoofer speaker system according to a second embodiment of the present invention.
  • Fig. 5 shows the sound pressure characteristics of the frequency of the bass band pass speaker system according to the first embodiment of the present invention.
  • the bass band-pass speaker system of the first embodiment includes, for example, a speaker cabinet 10 which is formed by dividing four faces along the long axis a into a rectangle and a long axis a.
  • the end face is formed by a square or rectangular rectangular parallelepiped. That is, the speaker cabinet 10 has an upper surface 10a, a lower surface 10b on the opposite side of the upper surface 10a, one side surface 10c between the upper surface 10a and the lower surface 10b, the other side surface 10d on the opposite side, one end surface 10e, and the opposite side The other end face 10f.
  • the inside of the speaker cabinet 10 has first to third spaces 11, 12, and 13 which are defined by the first and second partition walls 15, 16 which protrude shortly from the inner peripheral surface in the longitudinal direction a.
  • the first and third spaces 11, 13 are respectively formed at both end portions in the speaker cabinet 10, and the second space 12 is formed between the first space 11 and the third space 13, that is, the center unit.
  • the first partition wall 15 is formed in a rib shape and is disposed between the first space 11 and the second space 12.
  • the second partition wall 16 is disposed between the second space 12 and the third space 13.
  • the first and second partition walls 15, 16 are divided into first to third spaces 11, 12, and 13 and also function as mounting members of the plurality of speaker units 21, 22 provided in the speaker cabinet 10.
  • Each of the plurality of speaker units 21, 22 uses a speaker unit of the same shape and the same performance.
  • the speaker units 21, 22 are constituted by active speakers and a pair is prepared.
  • the first and second speaker units 21, 22 are disposed inside the speaker cabinet 10 in such a manner as to face each other.
  • the front refers to the diaphragm side.
  • a first speaker unit 21 has a magnetic circuit A 21, the yoke 21b combined Penjia (frame) 21c is comprised of a magnet, a yoke (yo ke), pole plate (pole piece) and the like.
  • a vibration system is provided in the basin frame 21c.
  • the vibration system is composed of a cone-shaped diaphragm 21 e having a voice coil 21 d and a bomber 21 f supporting the voice coil 21 d, and the outer peripheral portion of the diaphragm 21 e passes through the edge and the sagittal paper (gasket) It is supported by the outer peripheral portion of the basin frame 21c, and the voice coil 21d is provided in the magnetic gap of the magnetic circuit 21a so as to be vibrating.
  • the speaker unit 21 has an amplifier built in the case of an active speaker.
  • a general electric speaker can also be used.
  • the second speaker unit 22 is composed of a magnetic circuit 22a having a yoke 22b, a basin frame 22c, a voice coil 22d, a diaphragm 22e, an elastic wave 22f, and the like.
  • the first speaker unit 21 mounts the outer peripheral portion of the bracket 21c outside the first partition wall 15 by using a suitable fixing member such as a bolt, and the main portion including the magnetic circuit 21a and the basin frame 21c is located in the first space 11.
  • the front diaphragm 21e faces the second space 12 side.
  • the second speaker unit 22 also mounts the outer peripheral portion of the bracket 22c outside the second partition wall 16 by a suitable fixing member.
  • the diaphragm 21e of the first speaker unit 21 and the diaphragm 22e of the second speaker unit 22 are disposed to face each other with an interval therebetween, and sound waves from the respective diaphragms 21e, 22e are radiated toward the second space 12.
  • one end surface 10e has, for example, a circular opening portion in which a flat first passive radiator 31 is provided. That is, at the outer periphery of the first passive radiator 31 The annular edge 31a is provided, and the outer peripheral portion of the edge 31a is attached to the inner peripheral portion of the opening of the end surface 10e by a suitable fixing member, and the first passive radiator 31 is attached to the end surface 10e.
  • the outer peripheral portion of the edge 32a is similarly attached to the inner peripheral portion of the opening portion by a suitable fixing member, and the second passive radiator is mounted on the end face 10f.
  • the first and second passive radiators 31, 32 are located at positions apart from the back side of the first and second speaker units 21, 22, and are disposed coaxially with the long axis a of the central portion of the speaker cabinet 10.
  • a circular opening portion is provided at a central portion of the upper surface 10a of the speaker cabinet 10, and a third passive radiator 33 is attached to the outer peripheral portion of the edge 33a.
  • a fourth passive radiator 34 is attached to the opening portion of the center portion of the lower surface 10b on the side opposite to the upper surface 10a of the speaker cabinet 10 through the outer peripheral portion of the edge 34a.
  • the third and fourth passive radiators 33, 34 are respectively located at outer portions of the second space portion, and are disposed at a position coaxial with the short axis b of the speaker cabinet 10, the short axis b and the speaker cabinet 10
  • the long axis a is orthogonal.
  • the first to fourth passive radiators 31 to 34 function to enhance the bass. Further, in the present embodiment, the multiple resonance circuits composed of the first and second speaker units 21, 22, the first to fourth passive radiators 31 to 34, and the speaker cabinet 10 are designed to have a resonance frequency ratio of 1 :1 ⁇ 1 :5.
  • the front facing speaker units 21, 22 are completely accommodated inside the speaker cabinet 10 via the relatively large space of the second space 12 of the central portion of the speaker cabinet 10, so the mid-high range frequency Without leaking to the outside, only the low-range frequency at the side position on the short axis b of the second space 12 resonates the outward-facing passive radiators 33, 34, thereby enhancing the external radiation and improving the sharpness Bass.
  • the third and fourth passive radiators 31, 32 on the end faces of the speaker units 21, 22 also function in the same manner as the first and second passive radiators 33, 34 on the front side, contributing to the enhancement of radiation and Clear bass.
  • the bass type speaker system using the longer and larger acoustic conduit shown in Patent Document 3 In comparison, the miniaturization is realized more remarkably, and the improvement of the bass characteristics as shown in the frequency characteristic diagram of FIG. 5 is achieved.
  • the front and opposite first and second speaker units 21, 22 are disposed at positions that mutually absorb mechanical vibrations of the speaker unit itself generated by each other, so that the vibration of the entire speaker system can be alleviated, and at this time, the small bass can be improved thereby Reproduces the sound quality of the system and enhances the bass characteristics.
  • Fig. 4 shows a second embodiment of the present invention.
  • the rib-shaped third and fourth partition walls 15A and 16A are provided in the second space 12 portion of the speaker cabinet 10 of the first embodiment, and the third and the third portions are installed in the opening portions thereof.
  • Four passive radiators 33, 34 are formed from the upper surface 10a of the speaker cabinet 10 to the lower surface at the second space 12 portion of the embodiment 1.
  • the third partition wall 15A is provided at a position spaced apart from the first partition wall 15 and further inside than the first partition wall 15, that is, on the second speaker unit 22 side facing the first speaker unit 21, and the fourth partition wall 16A is provided
  • the first speaker unit 21 side faces the second speaker unit 22 at a position spaced apart from the second partition wall 16 and further inside than the second partition wall 16.
  • the third and fourth partition walls 15A and 16A are located on the peripheral portion of the opening of the upper surface 10a and the lower surface 10b of the first embodiment.
  • the diaphragms 21e, 22e and the third and fourth passive radiators 33, 34 of the first and second speaker units 21, 22 are disposed at a position coaxial with the long axis a of the speaker box 10, at the
  • the third passive radiator 33 is disposed in front of the diaphragm 21e of the speaker unit 21 at a distance from the diaphragm 21e.
  • a fourth passive radiator 34 is disposed opposite to the diaphragm 22e in front of the diaphragm 22e of the second speaker unit 22 with a space therebetween.
  • the acoustic duct 12A is constituted by these third partition walls 15A and third passive radiators 33 and the fourth partition wall 16A and the fourth passive radiator 34.
  • the sound conduit 12A does not extend in the longitudinal direction of the speaker cabinet 10, but is formed in the short-axis direction b, so that the length direction of the speaker cabinet 10 is not made. The size is increased to enable miniaturization.
  • the other structure is the same as that of Embodiment 1, and therefore the corresponding parts are denoted by the same reference numerals.
  • the corner portion may be formed in an arc shape or the corner portion may be formed into a polygonal shape.
  • Embodiments 1 and 2 it is assumed that a pair of speaker units 21, 22 are respectively used, but the present invention is not limited to only one pair. Although not shown, it is also possible to completely house two or more pairs of speaker units in one or more speaker cabinets, so that the front sides of each pair of speaker units are opposite, as described above and passively The radiators are combined to form a bass bandpass speaker system. In this case as well, the same effect can be obtained.

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Description

低音带通扬声器系统 技术领域：
本发明涉及一种嵌入到电视接收机等中或者与电视接收机等组合而 被用作高音质、 尤其低音域的特性优越的音响系统的、 实现了小型化的 低音带通扬声器系统。 背景技术：
以往， 内置于电视接收机等中的扬声器系统在与受限的安装空间的 尺寸相适应地促进小型化的期间， 除了各种设备的发展以外， 随着影像 技术的发展， 针对重放声音也逐渐要求高音质。 但是， 由于尺寸上的限 制， 扬声器的口径也受限， 从而特别是在低音域的高音质方面没有得到 充分发展。
在以改进低音域为目的的倒相式扬声器系统中， 在密闭型箱体的前 面障板 (baffle)上设有如声导管 (duct)那样的声反射部件， 由于向扬声器单 元背面辐射的声的一部分与经由声导管向前面辐射的声相位一致地辐 射， 因此低音再现范围被展阔。 并且， 已知一种扬声器系统， 在该扬声 器系统中， 用分隔板将箱体内部分成两个腔室， 在一个腔室侧， 在分隔 板上安装两个扬声器单元， 在两个腔室中设置声导管， 由此在声学上构 成了串联双重谐振回路， 该扬声器系统通过选择性地组合各声导管的谐 振频率， 能够任意地设定低音域特性。 但是， 在该结构中， 谐振系统为 2 个以下， 由于设计上的自由度较小， 可设定的特性范围有限， 因此尝试 提供一种通过比较简单的结构来改进这些方面的扬声器系统 (例如参照专 利文献 1)。 根据该文献 1 , 分别用具有规定容积的箱体覆盖多个扬声器单 元各自的振膜的前面和背面中的一面， 用规定容积的一个共用箱体覆盖 振膜的另一面， 通过在这些箱体中分别设置不同的谐振频率的声导管， 来整体构成多重谐振回路， 能够得到具有成为从所有声导管辐射的声输 出信号的总和的频率特性的扬声器系统。
在具备将从扬声器单元的背面辐射的声在相位反转后辐射到外部的 声导管的低音反射 (bass reflex)式扬声器系统中， 提出了为了得到能够再 现特别丰富的低音的高音质的其它方案 (例如参照专利文献 2)。 根据该文 献 2, 用金属板形成声导管的一部分， 通过改变其长度和形状来改变声导 管的容积， 通过改变由声导管带来的扬声器箱体的低音域的谐振频率， 能够将扬声器系统的低音域特性设为期望的特性。
然而， 在上述扬声器系统中， 在特别重视低音域而设为口径比较大 的扬声器单元的振膜进行动作时， 由于振动的反作用而导致整个箱体振 动， 从而成为内置扬声器系统的设备产生机械振动音或像质降低的原因。 为了抑制该振动， 不得不借助于机械部件， 从而难以简化结构， 特别是 在如上述倒相式、 低音反射式那样在声辐射系统中包括谐振系统的扬声 器系统中， 整个箱体的振动对再现声音特性产生较大的影响。
着眼于这一点， 提出了如下扬声器系统 (例如参照专利文献 3): 降低 振膜的反作用振动本身， 抑制扬声器系统整体的振动， 并且改进低音域 特性 , 不需要机械抑制部件或者能够简化机械抑制部件。
根据该文献 3 , 在背面侧将多个扬声器单元以机械方式结合， 并进行 电连接使得进行动作时相互的反作用振动的矢量之和为零， 从而降低扬 声器系统整体的振动， 并且在各扬声器单元的前面侧安装内置声导管型 或者密封型的箱体来使中高音域成分衰减， 对于内置声导管型， 将箱体 与声导管的谐振频率之比设定为 1 :1~1 :3 , 对于密闭型， 将箱体的容积比 设定为 1 : 1~1 :3 , 由此使低音域发生谐振， 从而改进低音特性。
专利文献 1 : 日本特开平 3-22797号公报
专利文献 2: 日本特开平 10-117311号公报
专利文献 3 : 日本特开 2010-81316号公才艮 发明内容：
专利文献 1和专利文献 2所公开的扬声器系统都存在如下问题： 由于 扬声器单元的振膜进行动作时的反作用振动引起扬声器系统整体的振 动， 因此声音特性受到影响。 专利文献 3所公开的扬声器系统构成解决该 问题的方案。 但是， 即使在作为该方案之一的多个扬声器单元之间的电 连接方面没有问题， 在通过内置声导管型或者密闭型的箱体使中高音域 成分衰减来改进低音域方面也存在空间上、 尺寸上的问题。 也就是说， 声导管、 箱体用于使从扬声器系统的前面或者背面辐射的声音反转来再 现低音域， 但是需要将相对于扬声器单元的高度方向具有几倍的长度的 声导管、 箱体的尺寸和形状设成为了调整谐振频率而设定的尺寸和形状， 从而扬声器系统的小型化受限。 并且， 这种声导管的使用成为空气噪声、 内部高音域反射声、 气流声等异常声的发生原因， 很难改进该问题。
本发明的目的在于解决这些课题， 并提供如下低音带通扬声器系统： 无需使用如在声音辐射系统中使扬声器系统的尺寸变大那样的声导管就 能够抑制由于振膜的反作用振动引起的扬声器系统整体的振动， 同时与 以往的低音扬声器系统相比进一步促进小型化， 并且能够进一步提高低 音特性。
为了达到上述目的， 本发明的技术方案 1所涉及的低音带通扬声器系 统的特征在于， 在具有上表面、 下表面、 两侧面以及位于该上表面、 下 表面、 两侧面两端的端面的长方体的扬声器箱体的内部将至少一对的第 一、 第二扬声器单元以前面相对并分开的方式相向配置， 并将第一、 第 二扬声器单元完全容纳于扬声器箱体的内部， 在上述扬声器箱体中设置 有多个无源辐射器。
根据本发明的技术方案 2 , 其特征在于， 在所述技术方案 1所述的低 音带通扬声器系统中， 在上述各端面分别设置无源辐射器， 各上述无源 辐射器与各上述扬声器单元的背面侧分开地进行设置， 在各扬声器单元 的前面侧也设有无源辐射器。
根据本发明的技术方案 3 , 其特征在于， 在本发明的技术方案 1所述 的低音带通扬声器系统中， 在各上述扬声器单元的前面侧的、 上述扬声 器箱体中央部的上表面和下表面分别设有无源辐射器。
根据本发明的技术方案 4, 其特征在于， 在本发明的技术方案 1所述 的低音带通扬声器系统中， 在上述扬声器箱体的中央部设有从其上表面 延伸到下表面的声导管， 与各上述扬声器单元的前面分开地在上述声导 管上分别设置无源辐射器。
根据本发明的技术方案 5 , 其特征在于， 在本发明的技术方案 1所述 的低音带通扬声器系统中， 由上述扬声器箱体内的各上述扬声器单元、 上述多个无源辐射器以及上述扬声器箱体构成的多重谐振回路的谐振频 率比例为 1 :1~1 :5。
根据本发明的技术方案 6, 其特征在于， 在本发明的技术方案 1所述 的低音带通扬声器系统中， 各上述扬声器单元的前面相向位置是相互吸 收彼此的扬声器单元整体的振动的位置。
根据本发明， 低音带通扬声器系统使至少一对扬声器单元前面相对 并完全地容纳在扬声器箱体内， 并且由于在扬声器箱体中安装了多个无 源辐射器， 因此无源辐射器在各扬声器单元辐射的低音域频率上发生谐 振， 从而能够增强低音域后辐射到外部， 另外， 由于扬声器单元相互吸 收单元自身的振动， 因此能够抑制并减轻扬声器系统整体的振动， 从而 能够实现扬声器箱体的小型化并且使低音域提高， 从而得到良好的低音 特性。 附图说明：
图 1是本发明的实施例 1所涉及的低音带通扬声器系统的俯视图； 图 2是图 1的 A-A'纵截面图； 图 3是本发明的实施例 1所涉及的低音带通扬声器系统的外观侧视 图；
图 4是表示本发明的实施例 2所涉及的低音带通扬声器系统的内部结 构的纵截面图；
图 5表示相对于本发明的实施例 1所涉及的低音带通扬声器系统的频 率的声压特性。
附图标记说明
10、 扬声器箱体； a、 长轴线； b、 短轴线； 11、 13、 第一、 第三空 间； 12、 第二空间； 12A、 声导管； 15、 16、 第一、 第二隔壁； 15A、 16A、 第三、 第四隔壁； 21、 22、 第一、 第二扬声器单元； 31~34、 第一〜第四 无源辐射器。 具体实施方式：
[实施例 1]
图 1〜图 3表示本发明的第一实施例。 如这些图所示， 本实施例 1的低 音带通扬声器系统例如包括扬声器箱体 10 , 该扬声器箱体 10是由将沿着 长轴线 a的四个面设为长方形、 将长轴线 a的两端面设为正方形或者长方 形的长方体形成的。 即， 扬声器箱体 10具有上表面 10a、 上表面 10a的相 反侧的下表面 10b、 上表面 10a和下表面 10b之间的一个侧面 10c、 相反侧 的另一侧面 10d、 一个端面 10e以及相反侧的另一端面 10f。 扬声器箱体 10 的内部具有用较短地突出于内周面的第一、 第二隔壁 15、 16在长轴线 a方 向上划分而成的第一〜第三空间 11、 12、 13。
在扬声器箱体 10内， 第一、 第三空间 11、 13分别形成在扬声器箱体 10内的两端部， 并且第二空间 12形成在第一空间 11与第三空间 13之间、 即中央部。
第一隔壁 15形成肋 (rib)状， 被设置在第一空间 11与第二空间 12之间。 第二隔壁 16被设置在第二空间 12与第三空间 13之间。
第一、 第二隔壁 15、 16划分形成第一〜第三空间 11、 12、 13 , 并且还 作为设置在扬声器箱体 10内的多个扬声器单元 21、 22的安装部件而发挥 作用。
多个扬声器单元 21、 22分别使用相同形状、 相同性能的扬声器单元。 在本实施例中，优选的是，扬声器单元 21、 22由有源扬声器 (Active Speaker) 构成， 并且准备一对。 第一、 第二扬声器单元 21、 22相互以前面相对的 方式设置在扬声器箱体 10内。 前面是指振膜侧。 第一扬声器单元 21具有 包含磁体、 磁轭 (yoke)、 极片（pole piece)等构成的磁路 21 a、 与磁轭 21b相 结合的盆架 (frame)21c。 在盆架 21c内设有振动系统。 振动系统由具有音 圈 (voice coil)21 d的锥形状的振膜 21 e以及支承音圈 21 d的弹波 (Damper)21 f 构成， 该振膜 21e的外周部通过边缘、 矢纸 (gasket)被盆架 21c的外周部所 支承， 音圈 21d以能够振动的方式被设置在磁路 21a的磁隙内。 另外， 该 扬声器单元 21在是有源扬声器的情况下内置放大器。 另外， 也可以使用 普通的电动式扬声器 (Dynamic Speaker)。
第二扬声器单元 22也同样地由具有磁轭 22b的磁路 22a、 盆架 22c、 音 圈 22d、 振膜 22e、 弹波 22f等构成。
第一扬声器单元 21通过使用螺栓等适当的固定部件将支架 21c的外 周部安装在第一隔壁 15的外侧， 包括磁路 21a、 盆架 21c的主体部分位于 第一空间 11。 前面的振膜 21e面向第二空间 12侧。
第二扬声器单元 22也通过适当的固定部件将支架 22c的外周部安装 在第二隔壁 16的外侧。
第一扬声器单元 21的振膜 21e和第二扬声器单元 22的振膜 22e被配置 成隔开间隔而相对置， 来自各振膜 21e、 22e的声波向第二空间 12辐射。
另外， 一个端面 10e例如具有圓形的开口部， 在该部分设有平板状的 第一无源辐射器 (passive radiator)31。 即， 在第一无源辐射器 31的外周部 上设置环状的边缘 31a, 通过适当的固定部件将边缘 31a的外周部安装在 端面 10e的开口部的内周部， 第一无源辐射器 31被安装在端面 10e上。
在另一端面 10f的开口部处， 同样地通过适当的固定部件将边缘 32a 的外周部安装在开口部的内周部， 第二无源辐射器被安装在端面 10f上。
第一、 第二无源辐射器 31、 32位于与第一、 第二扬声器单元 21、 22 的背面侧分开的位置处， 被设置成与扬声器箱体 10的中央部的长轴线 a同 轴。
另外， 在扬声器箱体 10的上表面 10a的中央部设有例如圓形的开口 部， 在此处通过边缘 33a的外周部安装有第三无源辐射器 33。
并且， 在扬声器箱体 10的与上表面 10a相反侧的下表面 10b的中央部 的开口部处同样地通过边缘 34a的外周部安装有第四无源辐射器 34。
第三、 第四无源辐射器 33、 34分别位于第二空间部的外侧部分， 被 设置在与扬声器箱体 10的短轴线 b同轴的位置上， 该短轴线 b与扬声器箱 体 10的长轴线 a正交。
在上述内容中， 第一〜第四无源辐射器 31~34起到增强低音的作用。 此外， 在本实施例中， 由第一、 第二扬声器单元 21、 22、 第一〜第四 无源辐射器 31~34以及扬声器箱体 10构成的多重谐振回路被设计成谐振 频率比例为 1 :1~1 :5。
在上述结构中， 隔着扬声器箱体 10的中央部分的第二空间 12这一比 较大的空间而前面相向的扬声器单元 21、 22被完全容纳在扬声器箱体 10 的内部， 因此中高音域频率不会泄漏到外部， 仅有低音域频率在第二空 间 12的短轴线 b上的侧面位置处使面向外部的无源辐射器 33、 34发生谐 振， 从而向外部辐射被增强并且提高了清晰度的低音。 扬声器单元 21、 22的端面侧的第三、 第四无源辐射器 31、 32也与前面侧的第一、 第二无 源辐射器 33、 34同样地发挥功能， 有助于辐射被增强并且清晰化的低音。 因而， 与专利文献 3所示的使用了较长较大的声导管的低音型扬声器系统 相比， 更显著地实现了小型化， 并且实现了如图 5的频率特性图所示那样 的低音特性的提高。
此外， 前面相向的第一、 第二扬声器单元 21、 22被设置在相互吸收 彼此所产生的扬声器单元自身的机械振动的位置处， 因此能够减轻扬声 器系统整体的振动， 同时能够由此改进小型低音再现系统的音质， 提高 低音特性。
[实施例 2]
图 4表示本发明的第二实施例。 在本实施例中， 具有如下特征： 在实 施例 1的扬声器箱体 10的第二空间 12部分处设置肋状的第三、 第四隔壁 15A、 16A, 在它们的开口部安装第三、 第四无源辐射器 33、 34, 在实施 例 1的第二空间 12部分处形成从扬声器箱体 10的上表面 10a延伸至下表面
10b的声导管 12A。
第三隔壁 15A被设置在与第一隔壁 15隔开间隔并且比第一隔壁 15更 靠内侧的位置上、 即与第一扬声器单元 21相向的第二扬声器单元 22侧， 第四隔壁 16A被设置在与第二隔壁 16隔开间隔并且比第二隔壁 16更靠内 侧的位置上、 即与第二扬声器单元 22相向的第一扬声器单元 21侧。 第三、 第四隔壁 15A、 16A位于实施例 1的上表面 10a、 下表面 10b的开口部的周 边部。
此外， 第一、 第二扬声器单元 21、 22的振膜 21e、 22e以及第三、 第 四无源辐射器 33、 34被设置在与扬声器箱 10的长轴线 a同轴的位置上， 在 第一扬声器单元 21的振膜 21e的前方与振膜 21e隔开间隔相向地配置第三 无源辐射器 33。 另外， 在第二扬声器单元 22的振膜 22e的前方与振膜 22e 隔开间隔相向地配置第四无源辐射器 34。
由这些第三隔壁 15A和第三无源辐射器 33以及第四隔壁 16A和第四 无源辐射器 34构成声导管 12A。 该声导管 12A不是沿扬声器箱体 10的长轴 线方向延伸， 而是在短轴线方向 b上构成， 不使扬声器箱体 10的长度方向 的尺寸增大， 从而能够实现小型化。
其它的结构与实施例 1相同， 因此对应部分用相同的附图标记表示。 在上述实施例 1、 2中示出了将扬声器箱体 10设为长方体的例子， 但 是也可以将角部形成为弧形或者将角部做成面形状而构成为多边形。
另外， 在上述实施例 1和 2中， 设为分别使用一对扬声器单元 21、 22, 但是本发明不仅仅限于一对。 虽然没有图示， 但是也可以将两对或者两 对以上的多对扬声器单元完全容纳在一个或者多个扬声器箱体的内部， 使每一对扬声器单元的前面相对， 如上所述那样与无源辐射器组合， 由 此构成低音带通扬声器系统。 在这种情况下也能够得到同样的效果。

Claims

权利要求
1. 一种低音带通扬声器系统， 其特征在于，
在具有上表面、 下表面、 两侧面以及位于该上表面、 下表面、 两侧 面的两端的端面的长方体的扬声器箱体的内部将至少一对的第一、 第二 扬声器单元以前面相对并分开的方式相向配置， 并将第一、 第二扬声器 单元完全容纳于扬声器箱体的内部，
在上述扬声器箱中设置有多个无源辐射器。
2. 根据权利要求 1所述的低音带通扬声器系统， 其特征在于， 在上 述各端面分别设置无源辐射器， 各上述无源辐射器与各上述扬声器单元 的背面侧分开地进行设置， 在各扬声器单元的前面侧也设有无源辐射器。
3. 根据权利要求 1所述的低音带通扬声器系统， 其特征在于， 在各 上述扬声器单元的前面侧的、 上述扬声器箱体中央部的上表面和下表面 分别设有无源辐射器。
4. 根据权利要求 1所述的低音带通扬声器系统， 其特征在于， 在上 述扬声器箱体的中央部设有从其上表面延伸到下表面的声导管， 与各上 述扬声器单元的前面分开地在上述声导管上分别设置无源辐射器。
5. 根据权利要求 1所述的低音带通扬声器系统， 其特征在于， 由上 述扬声器箱体内的各上述扬声器单元、 上述多个无源辐射器以及上述扬 声器箱体构成的多重谐振回路的谐振频率比例为 1 : 1~1 :5。
6. 根据权利要求 1所述的低音带通扬声器系统， 其特征在于， 各上 述扬声器单元的前面相向位置是相互吸收彼此的扬声器单元整体的振动 的位置。
PCT/CN2010/075432 2010-07-23 2010-07-23 低音带通扬声器系统 WO2012009861A1 (zh)

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CN113179466A (zh) * 2021-04-22 2021-07-27 深圳市瀚宏数码科技有限公司 一种便于拆卸易于防尘的音响

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CN201365331Y (zh) * 2009-01-19 2009-12-16 嘉兴天音电子有限公司 内置扬声器低音音箱

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