WO2019218520A1 - 一种增强低频的扬声器箱体 - Google Patents

一种增强低频的扬声器箱体 Download PDF

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Publication number
WO2019218520A1
WO2019218520A1 PCT/CN2018/102301 CN2018102301W WO2019218520A1 WO 2019218520 A1 WO2019218520 A1 WO 2019218520A1 CN 2018102301 W CN2018102301 W CN 2018102301W WO 2019218520 A1 WO2019218520 A1 WO 2019218520A1
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Prior art keywords
speaker
sound
low frequency
sound absorbing
case
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PCT/CN2018/102301
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English (en)
French (fr)
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梁国华
许王华
高天
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上海安费诺永亿通讯电子有限公司
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Priority claimed from CN201820796118.3U external-priority patent/CN208273235U/zh
Application filed by 上海安费诺永亿通讯电子有限公司 filed Critical 上海安费诺永亿通讯电子有限公司
Publication of WO2019218520A1 publication Critical patent/WO2019218520A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • 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; DEAF-AID SETS; 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 field of sound boxes, in particular to a speaker box capable of enhancing low frequency.
  • the existing speaker sound box will be filled with sound absorbing materials (such as sound absorbing cotton, porous particles) to improve the low frequency of the speaker system and eliminate resonance.
  • sound absorbing materials such as sound absorbing cotton, porous particles
  • the micro speaker cabinet in electronic products also follows this design form, but due to mobile phones, etc.
  • the structural limitation of the electronic product makes the size of the whole speaker cabinet small, and the size of the box directly affects the effective playback bandwidth of the low frequency of the speaker.
  • the speaker cabinet of the electronic device does not get a good low frequency, and due to the volume limitation of the cabinet, it is impossible to add too much sound absorbing material inside, so the low frequency part of the speaker of the existing electronic equipment is difficult to achieve an ideal state. .
  • the utility model provides a speaker box capable of enhancing low frequency, so as to solve the problem that the low frequency effect of the speaker is not ideal due to size limitation in the prior art, in order to achieve the above problem, the utility model provides the following technical solution: an enhanced low frequency a speaker cabinet comprising a speaker and a case, the case comprising a front case and a rear case, the front case and the rear case enclosing a box space; the speaker being mounted on a front case or a rear of the case
  • the casing of the casing is provided with an opening, and the sound absorbing panel is disposed at the opening, and the outer portion of the casing is provided with a soundproof structure for shielding the vibration sound of the sound absorbing panel from being Superimposed on the sound produced by the speaker diaphragm.
  • the soundproof structure is a device housing with a speaker enclosure.
  • the soundproof structure is a cover that covers the exterior of the opening of the case.
  • the opening is disposed in one or more housings, and the opening and the sound absorbing panel are disposed in a plurality of orientations, which can effectively suppress the reflection of sound in the cavity, increase the effective cavity volume, and improve the low frequency. Sound quality.
  • the number of openings is not less than one in each of the housings in which the openings are provided.
  • the appropriate increase in the number of openings can further suppress the reflection of sound in the cavity and increase the volume of more effective cavity.
  • a porous sound absorbing member such as sound absorbing cotton or porous particles is disposed in the casing for reducing the reflection of sound inside the casing, and the sound absorbing material is used together with the sound absorbing panel to further increase the effective cavity volume. Improve sound quality.
  • the sound absorbing panel is disposed on an outer surface of the housing for reducing reflection of sound waves and increasing the volume of the effective cavity.
  • the sound absorbing panel is disposed on an inner surface of the casing for reducing reflection of sound waves and increasing an effective cavity volume.
  • the solution comprises a box body and a speaker part, a plurality of through holes are arranged in the casing of the box body, and a sound absorbing panel is arranged on the through hole, the structure is such that not all the sound waves are reflected back after being incident on the sound absorbing panel, and The sound wave is transmitted through the vibration of the sound absorbing panel to achieve the consumption of sound energy, thereby equivalently increasing the volume of the effective cavity, and the increased effective cavity volume allows the speaker cabinet to obtain better low frequency playback.
  • the present invention is provided with a shielding structure for sound insulation around the opening of the sound absorbing panel, which prevents the vibration sound of the sound absorbing panel from being transmitted to the outside, and affects the sound quality of the speaker.
  • This scheme can use the equipment casing equipped with the speaker as the shielding structure, which can effectively reduce the cost and the process difficulty.
  • This scheme can also weld or glue a cover plate around the opening of the box to accurately isolate the vibration sound and improve the sound quality.
  • the sound absorbing panel of the solution can be used alone, or a porous sound absorbing material such as sound absorbing cotton, porous particles, etc. can be added in the box body, and two sound absorbing structure modes are adopted, which can be large in the case where the volume of the box body is limited.
  • the amplitude increases the low frequency sound quality of the speaker.
  • the sound absorbing panel can be disposed on a plurality of faces of the box body, and the number of sound absorbing panels provided on each surface can also be plural.
  • the parameters such as the compliantness and weight of the sound absorbing panel can be adjusted to change the low frequency effect. More flexible to use.
  • FIG. 1 is a schematic structural view of a conventional micro-speaker case product
  • FIG. 3 is a schematic structural view of a conventional speaker box product with a passive film
  • Figure 5 is a schematic view showing the structure of a speaker with a single opening in the present embodiment
  • FIG. 6 is a schematic diagram of a shielding structure provided by using a device housing according to the present embodiment
  • Figure 7 is a comparison diagram of the impedance curves of the present invention and the existing speaker cabinet and the speaker cabinet with the passive membrane;
  • Figure 8 is a comparison diagram of the frequency response curves of the present invention and the existing speaker cabinet and the speaker cabinet with the passive membrane;
  • FIG. 9 is a schematic structural view of a speaker provided with a plurality of openings in the present embodiment.
  • FIG. 1 shows a conventional speaker cabinet structure, including a front shell 1, a rear shell 2, and a speaker 4.
  • the front shell 1 and the rear shell 2 are fixed into a box space by a sealant 3 or welding, and the speaker 4 Mounted on the front or rear case.
  • This structure is sometimes limited by the volume limitation of the cavity, and the low frequency performance of the speaker cabinet is not good. Therefore, some speaker cabinets are provided with sound absorbing cotton 6 or other porous material inside the cavity for improving low frequency performance.
  • the space occupied by the sound absorbing cotton 6 or other porous materials is limited, so that the improvement of the low frequency cannot meet the functional requirements.
  • FIG. 2 is an impedance curve diagram of a conventional micro-speaker cabinet product; wherein the abscissa corresponding to the resonance peak 8 is the resonance frequency 10 of the speaker cabinet.
  • the 3 is a conventional speaker box structure with a passive film, including a front case 1, a rear case 2, a speaker 4, and a passive film 7, wherein the front case 1 and the rear case 2 are fixed into a box space by a sealant 3 or welding.
  • the speaker 4 is mounted on the front case or the rear case, and the structure is provided with a through hole on the casing of the case, and a passive film 7 is disposed on the through hole, and when the speaker 4 is in operation, the air inside the case is pushed, thereby Push the passive membrane 7 to make a sound.
  • the sound emitted by the passive film 7 is superimposed on the sound emitted by the speaker 4, and the purpose is mainly to improve the low frequency sensitivity.
  • the passive film 7 is a speaker diaphragm.
  • FIG. 5 is a schematic structural view of the present invention, including a speaker 4 and a box body, the box body including a front case 1 and a rear case 2, the front case 1 and the rear case 2 enclosing a box space;
  • the speaker 4 is installed at The front shell or the rear shell of the box body, and the structure is provided with a plurality of through holes on the shell of the box body, and the sound absorbing panel 5 is disposed on the through hole so that the sound waves are not totally reflected after being incident on the sound absorbing panel 5 Coming back, the sound wave is transmitted through the vibration of the sound absorbing panel 5 to achieve the consumption of sound energy, thereby equivalently increasing the volume of the effective cavity, and increasing the effective cavity volume enables the speaker 4 cabinet to be better. Low frequency playback.
  • FIG. 6 is an embodiment of the present embodiment.
  • the solution is provided with an opening provided for the sound absorbing panel 5 on the opposite side of the speaker 4.
  • the sound absorbing panel 5 can be effectively isolated by using the device housing 17.
  • the sound emitted by the vibration isolates the sound emitted by the speaker 4 from the sound emitted by the sound absorbing panel 5, preventing it from being superimposed, and effectively improving the overall sound quality of the device.
  • the solution is provided with a cover plate for sound insulation at each opening provided with the sound absorbing plate, and the cover plate can be accurately disposed on the outside of the sound absorbing plate 5 by means of welding machine or gluing.
  • the targeted shielding of the vibration sound is beneficial to improve the sound quality of the speaker.
  • the side on which the opening is provided in the box body can also adopt a whole soundproof cover plate, and the one side of the box body is sound-insulated at a large time, and the method can improve the shielding effect and also to some extent. Reduced operating processes to achieve the desired level of sound quality.
  • the program can increase the structure of the sound absorbing cotton 6 in the speaker, and the sound absorbing cotton 6 is attached on the inner wall of the speaker cavity, and is used simultaneously with the sound absorbing panel 5, and the volume of the box is limited.
  • the low-frequency sound quality of the speaker can be greatly improved.
  • FIG. 7 is a comparison diagram of the impedance curves of the present invention and the existing speaker cabinet and the speaker cabinet with the passive membrane; the impedance curve 13 of the present scheme is compared with the existing speaker enclosure impedance curve 11 The resonant frequency 10 of the scheme moves to the low frequency, and the low frequency effect is better. Comparing the impedance curve 13 of the present scheme with the speaker box impedance curve 12 with a passive film, it can be seen that there is no resonance peak 9 before the resonant frequency 10 of the present scheme, indicating that the scheme can obtain more pure low-frequency sound quality.
  • Figure 8 is a comparison diagram of the frequency response curve of the present speaker cabinet and the speaker cabinet with the passive membrane; the frequency response curve 15 of the speaker cabinet with the passive membrane, and the frequency response curve of the ordinary loudspeaker enclosure 14
  • the sensitivity near the resonant frequency is improved, but the sensitivity at the low frequency start frequency band is lower than that of the ordinary speaker cabinet; the frequency response curve 16 of the present scheme is compared with the frequency response curve 14 of the existing speaker cabinet.
  • the low-frequency sensitivity has been improved overall, which has the effect of widening the entire low frequency.
  • a plurality of openings may be disposed in the box body, and the opening position may be provided with a plurality of sound absorbing sounds in one housing of the box body.
  • the plate 5 may also be provided with a plurality of sound absorbing panels 5 in a plurality of casings of the casing.
  • parameters such as the compliantness and weight of the sound absorbing panel 5 may be changed to change the vibration frequency thereof, thereby changing The sound wave of a certain range of audio is absorbed, thereby achieving the purpose of adjusting the sound absorbing panel 5 to improve the effect.
  • the material of the sound absorbing panel 5 is an object that can vibrate, including but not limited to a horn diaphragm.
  • the soundproof structure is not limited to the above embodiment, and the purpose of the solution is to prevent the vibration sound of the sound absorbing panel from superimposing with the sound of the speaker, so that the manner in which the insulating effect can be achieved for this purpose should fall within the protection scope of the present scheme.

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

本实用新型公开了一种增强低频的扬声器箱体，该扬声器箱体包括扬声器和箱体，所述箱体包括前壳和后壳，所述前壳与后壳围成一箱体空间；所述扬声器安装在所述箱体的一个前壳或后壳上；所述箱体的壳体设置有开孔，且在开孔处覆盖设置吸音板。所述开孔设置在一个或多个壳体上。每个设置开孔的壳体，开孔及吸音板的数量不少于一个。箱体的外部设置有隔音结构，用于屏蔽所述吸音板的振动声音。

Description

一种增强低频的扬声器箱体 技术领域
本实用新型涉及音箱领域，尤其涉及一种可增强低频的扬声器箱体。
背景技术
现有的扬声器音响箱体内部会填加吸音材料(如吸音棉，多孔颗粒)改善扬声器系统的低频和消除共振，电子产品中的微型扬声器箱体同样沿用了这种设计形式，但由于手机等电子产品的结构限制，使得整个扬声器箱体尺寸变的很小，而箱体的大小直接影响扬声器低频的有效重放带宽，箱体越小低频越差，所以在有限的微型箱体中，手机等电子设备的扬声器箱体并不能得到很好的低频，而由于箱体的体积限制，使其内部不能添加过多的吸音材料，因此现有电子设备的扬声器低频部分难以做到比较理想的状态。
实用新型内容
本实用新型提供一种可增强低频的扬声器箱体，以解决现有技术中因尺寸限制导致音箱低频效果不理想的问题，为实现上述问题，本实用新型提供一下技术方案：一种增强低频的扬声器箱体，包括扬声器和箱体，所述箱体包括前壳和后壳，所述前壳与后壳围成一箱体空间；所述扬声器安装在所述箱体的一个前壳或 后壳上；所述箱体的壳体设置有开孔，且在开孔处覆盖设置吸音板，所述箱体的外部设置有隔音结构，用于屏蔽所述吸音板的振动声音，使其不和扬声器振膜产生的声音叠加。
在一些具体实施例中，所述隔音结构为带有扬声器箱体的设备壳体。
在一些具体实施例中，所述隔音结构为一盖板，覆盖在所述箱体的开孔处的外部。
在一些具体实施例中，所述开孔设置在一个或多个壳体，在多个方位设置开孔和吸音板，能够有效抑制声音在腔体内的反射，增大有效腔体体积，改善低频音质。
在一些具体实施例中，在每个设置开孔的壳体，开孔的数量不少于一个。开孔数量适量增加，能进一步抑制对腔体内的声音反射，增大更多有效腔体体积。
在一些具体实施例中，所述箱体内设置一多孔吸音件例如吸音棉或多孔颗粒，用于减小箱体内部声音的反射，吸音材质与吸音板配合使用，进一步增大有效腔体体积，改善音质效果。
在一些具体实施例中，所述吸音板设置在所述箱体的外表面，用于减少声波的反射，增大有效腔体体积。
在一些具体实施例中，所述吸音板设置在所述箱体的内表面，用于减少声波的反射，增大有效腔体体积。
通过采用上述技术方案，使其与现有技术相比具有以下有益效果：
(1)本方案包括箱体和扬声器部分，在箱体的壳体上设置有若干个通孔，在 通孔上设置有吸音板，该结构使声波入射吸音板后并不是全部反射回来，而是通过吸音板的振动把声波传递出去，达到声能量的消耗，进而等效增大了有效腔体体积的目的，增大的有效腔体体积让扬声器箱体能得到更好的低频重放。且本方案在设置吸音板的开孔处周围设置有一用于隔音的屏蔽结构，防止吸音板振动声音传到外部，影响音箱声音质感。
(2)本方案可以利用装备本扬声器的设备壳体作为屏蔽结构，能有效降低成本和工艺难度。
(3)本方案还可以在箱体的开孔处的周围焊接或胶粘一罩板，精确隔离振动声音，提高音质。
(4)本方案吸音板可以单独使用，也可以在箱体中增加多孔的吸音材料，如吸音棉、多孔颗粒等，同时采用两种吸音结构方式，在箱体体积受限的情况下可大幅度提高音箱的低频音质。
(5)吸音板可设置在箱体的多个面上，且每个面上设置的吸音板数量也可以是多个，另外可调整吸音板的顺性与重量等参数改变低频的改善效果，使用更加灵活。
附图说明
图1为现有微型扬声器箱体产品结构示意图；
图2为现有微型扬声器箱体产品的阻抗曲线图；
图3为现有带被动膜的扬声器箱体产品结构示意图；
图4为现有带有被动膜的扬声器箱体产品的阻抗曲线图；
图5为本方案设置单个开孔的音箱结构示意图；
图6为本方案利用设备壳体设置屏蔽结构的示意图；
图7为本方案和现有的扬声器箱体、带被动膜的扬声器箱体的阻抗曲线对比图；
图8为本方案和现有的扬声器箱体、带被动膜的扬声器箱体的频响曲线对比图；
图9为本方案设置多个开孔的音箱结构示意图；
标号说明
1‐前壳，2‐后壳，3‐密封胶/超声线，4‐扬声器，5‐吸音板，6‐吸音棉，7‐被动膜，8‐谐振峰，9‐被动膜谐振峰，10‐谐振频率，11‐现有扬声器箱体的阻抗曲线，12‐带被动膜的扬声器箱体的阻抗曲线，13‐本方案的阻抗曲线，14‐现有扬声器箱体的频响曲线，15‐带被动膜的扬声器箱体的频响曲线，16‐本方案的频响曲线，17‐设备壳体。
具体实施方式
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推广，因此本实用新型不受下面公开的具体实施的限制。
请参阅图1，图1为现有的扬声器箱体结构，包括前壳1、后壳2、扬声器4，其中前壳1与后壳2通过密封胶3或焊接固定成一箱体空间，扬声器4安装在前壳或后壳上。该结构有时由于腔体的体积限制，扬声器箱体的低频性能不好，因此有些扬声器箱体在腔体内部设置有吸音棉6或其他多孔材料，用于改善低频性能。但由于体积限制，吸音棉6或其他多孔材料所占空间有限，使得低频的改善无法满足功能的需求。
图2为现有微型扬声器箱体产品的阻抗曲线图；其中谐振峰8对应的横坐标为扬声器箱体的谐振频率10。
图3为现有的带被动膜的扬声器箱体结构，包括前壳1、后壳2、扬声器4，被动膜7，其中前壳1与后壳2通过密封胶3或焊接固定成一箱体空间，扬声器4安装在前壳或后壳上，并且该结构在箱体的壳体上设置有通孔，在通孔上设置有被动膜7，扬声器4工作时，推动箱体内部空气流动，从而推动被动膜7振动发出声音。被动膜7发出的声音要和扬声器4发出的声音叠加利用，用途主要是提升低频灵敏度。在本实施例中，被动膜7为扬声器膜片。
图4为现有的带被动膜的扬声器箱体产品的阻抗曲线图；该扬声器箱体的被动膜7会产生谐振，所以在谐振峰8前面，还有一个被动膜谐振峰9.
图5为本方案结构示意图，包括扬声器4和箱体，所述箱体包括前壳1和后壳2，所述前壳1与后壳2围成一箱体空间；所述扬声器4安装在所述箱体的前壳或后壳上，并且该结构在箱体的壳体上设置有若干个通孔，在通孔上设置有吸音板5，使声波入射吸音板5后并不是全部反射回来，而是通过吸音板5的振动把声波传递出去，达到声能量的消耗，进而等效增大了有效腔体体积的目的，增大的有效腔体体积让扬声器4箱体能得到更好的低频重放。
图6为本方案的一实施例，本方案将为吸音板5设置的开口设置在于扬声器4相反的背面，当本设备安装在某个特定设备后，利用设备壳体17能够有效隔绝吸音板5振动发出的声音，使扬声器4发出的声音和吸音板5发出的声音隔离，阻止其进行叠加，能够有效提高设备的整体音质效果。
作为本方案的另一实施例，本方案在每个设置有吸音板的开孔处设置一用于隔音的盖板，盖板可通过焊机或胶粘等方式精确设置在吸音板5的外部，对振动声音进行针对性屏蔽，有利于提升音箱的音质水平。当然，在箱体上设置有开孔的一侧也可以采用以整片隔音盖板，一次性大面积的对箱体的一侧进行隔音处理，该方法既能提高屏蔽效果，也一定程度上降低了操作工艺，达到理想的音质水平。
进一步的，为增加音箱低音频率的效果，本方案在音箱中可以增加吸音棉6结构，将吸音棉6贴覆在音箱腔体的内壁上，与吸音板5同时使用，在箱体体积受限的情况下可大幅度提高音箱的低频音质。
请参阅图7，该曲线图为本方案和现有的扬声器箱体、带被动膜的扬声器箱体的阻抗曲线对比图；本方案的阻抗曲线13与现有的扬声器箱体阻抗曲线11对比可知，本方案的谐振频率10向低频移动，低频效果更好。本方案的阻抗曲线13与带被动膜的扬声器箱体阻抗曲线12对比可知，在本方案的谐振频率10之前没有谐振峰9，说明本方案能得到更纯粹的低频音质。
图8为本方案和现有的扬声器箱体、带被动膜的扬声器箱体的频响曲线对比图；带被动膜的扬声器箱体的频响曲线15，与普通扬声器箱体的频响曲线14对比，在谐振频率附近的灵敏度有提升，但在低频起始频段的灵敏度比普通扬声器箱体的灵敏度有下降；本方案的频响曲线16和现有的扬声器箱体的频响曲线14对比，低频灵敏度整体都有提升，起到了拓宽整个低频的效果。
做为本实用新型的另一实施例，请参阅图9，为进一步增强低频改善效果，在箱体上可设置有多个开孔，开孔位置可以在箱体的一个壳体设置多个吸音板5，也可在箱体的多个壳体设置多个吸音板5，为改善吸音板5的吸音效果，可改变吸音板5的顺性和重量等参数，以改变其振动频率，从而改变吸收某一段音频范围的声波，进而达到调整吸音板5改善效果的目的。吸音板5的材质为可以振动的物体，包括但不限于喇叭膜片。
当然，隔音结构不限于上述实施例，本方案的目的是阻止吸音板振动声音与扬声器的声音叠加，因此凡是以该目的能够达到隔绝效果的方式均应落入本方案的保护范围之内。
本实用新型虽然以较佳实施例公开如上，但其并不是用来限定权利要求，任何本领域技术人员在不脱离本实用新型的精神和范围内，都可以做出可能的变动和修改，因此本实用新型的保护范围应当以本实用新型权利要求所界定的范围为准。

Claims (8)

  1. 一种增强低频的扬声器箱体，其特征在于，包括扬声器和箱体，所述箱体包括前壳和后壳，所述前壳与后壳围成一箱体空间；所述扬声器安装在所述箱体的一个前壳或后壳上；所述箱体的壳体设置有开孔，且在开孔处覆盖设置吸音板，所述箱体的外部设置有隔音结构，用于屏蔽所述吸音板的振动声音，使其不和扬声器振膜产生的声音叠加。
  2. 根据权利要求1所述的一种增强低频的扬声器箱体，其特征在于，所述隔音结构为安装所述扬声器箱体的设备壳体。
  3. 根据权利要求1所述的一种增强低频的扬声器箱体，其特征在于，所述隔音结构为一盖板，覆盖在所述箱体的开孔处的外部。
  4. 根据权利要求1所述的一种增强低频的扬声器箱体，其特征在于，所述开孔设置在一个或多个壳体上。
  5. 根据权利要求4所述的一种增强低频的扬声器箱体，其特征在于，在每个设置开孔的壳体，开孔的数量不少于一个。
  6. 根据权利要求1所述的一种增强低频的扬声器箱体，其特征在于，所述箱体内设置一吸音件，例如吸音棉或多孔颗粒，用于减少箱体内部声音的反射，增大有效腔体体积。
  7. 根据权利要求1所述的一种增强低频的扬声器箱体，其特征在于，所述吸音板设置在所述箱体的外表面，用于减少声波的反射，增大有效腔体体积。
  8. 根据权利要求1所述的一种增强低频的扬声器箱体，其特征在于，所述吸音板设置在所述箱体的内表面，用于减少声波的反射，增大有效腔体体积。
PCT/CN2018/102301 2018-05-15 2018-08-24 一种增强低频的扬声器箱体 WO2019218520A1 (zh)

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