WO2021000109A1 - 一种扬声器 - Google Patents

一种扬声器 Download PDF

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Publication number
WO2021000109A1
WO2021000109A1 PCT/CN2019/094007 CN2019094007W WO2021000109A1 WO 2021000109 A1 WO2021000109 A1 WO 2021000109A1 CN 2019094007 W CN2019094007 W CN 2019094007W WO 2021000109 A1 WO2021000109 A1 WO 2021000109A1
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WO
WIPO (PCT)
Prior art keywords
cavity
cover plate
closing member
speaker
upper cover
Prior art date
Application number
PCT/CN2019/094007
Other languages
English (en)
French (fr)
Inventor
吴军
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2019/094007 priority Critical patent/WO2021000109A1/zh
Priority to CN201921023468.7U priority patent/CN210781298U/zh
Publication of WO2021000109A1 publication Critical patent/WO2021000109A1/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
    • 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

Definitions

  • the utility model relates to the technical field of electroacoustic converters.
  • the back cavity of the speaker is usually filled with sound-absorbing powder to absorb sound to improve the low frequency.
  • the speaker of the existing structure does not make full use of the space of the rear cavity to fill the sound-absorbing powder, which restricts the filling area and volume of the sound-absorbing powder, resulting in limited improvement of the low-frequency effect of the speaker.
  • a speaker includes an upper cover plate, a lower cover plate that is connected to the upper cover plate and encloses an accommodation space with the upper cover plate, and a speaker unit accommodated in the accommodation space.
  • the speaker unit The housing space is divided into a front cavity and a rear cavity opposite to the front cavity.
  • the lower cover includes a bottom wall and an enclosure extending from the bottom wall to the upper cover.
  • the speaker The monomer is fixed to the enclosure, and the bottom wall, the enclosure, and the speaker monomer are cooperated in the rear cavity to isolate a perfusion cavity, and the perfusion cavity is filled with sound-absorbing powder.
  • the enclosure is provided with an opening connecting the rear cavity and the perfusion cavity, and a first air-permeable spacer that seals the opening.
  • the sound-absorbing powder can be poured into the perfusion cavity, thereby increasing the area and volume of the sound-absorbing powder in the speaker. After pouring sound-absorbing powder into the speaker, the low-frequency effect of the speaker is improved.
  • Figure 1 is a schematic diagram of the structure of the speaker according to the embodiment of the utility model
  • Figure 2 is an exploded view of the speaker of the embodiment of the utility model
  • Figure 3 is an exploded view of the speaker from another perspective of the embodiment of the utility model
  • Fig. 4 is a cross-sectional view along the A-A direction in Fig. 1.
  • a speaker includes an upper cover plate, a lower cover plate that is connected to the upper cover plate and encloses an accommodation space with the upper cover plate, and a speaker unit accommodated in the accommodation space.
  • the speaker unit The housing space is divided into a front cavity and a rear cavity opposite to the front cavity.
  • the lower cover includes a bottom wall and an enclosure extending from the bottom wall to the upper cover.
  • the speaker The monomer is fixed to the enclosure, and the bottom wall, the enclosure, and the speaker monomer are cooperated in the rear cavity to isolate a perfusion cavity, and the perfusion cavity is filled with sound-absorbing powder.
  • the enclosure is provided with an opening connecting the rear cavity and the perfusion cavity, and a first air-permeable spacer that seals the opening.
  • the upper cover plate is provided with a surrounding wall corresponding to the position of the rear cavity, the surrounding wall is provided with a second air-permeable spacer, and the surrounding wall and the second air-permeable spacer are fitted in the rear cavity
  • An accommodating cavity is isolated from the inside, and the accommodating cavity is filled with sound-absorbing powder.
  • a communication hole is opened on the bottom wall to connect the perfusion cavity with the outside;
  • a first closing member that closes the communication hole is also provided on the bottom wall;
  • the inner wall of the communicating hole is circumferentially provided with a clamping groove with a width consistent with the thickness of the first closing member and having the first closing member to be inserted circumferentially to close the communicating hole.
  • the first closing member is provided on a side of the inner wall of the communication hole away from the upper cover plate, and the inner wall of the communication hole is located at an end of the inner wall of the lower cover plate away from the upper cover plate There is a predetermined distance between.
  • a first filling hole is opened on the first closing member; a second closing member that closes the first filling hole is movably mounted on the first closing member; and the second closing member is arranged on the The first closing member is away from a side of the speaker unit, and the predetermined distance is greater than or equal to the thickness of the second closing member.
  • cross-sectional shape of the communication hole in the direction perpendicular to the depth of the accommodating cavity is consistent with the cross-sectional shape of the speaker unit near the lower cover plate in the direction perpendicular to the depth of the accommodating cavity.
  • the upper cover has a receiving groove recessed toward the lower cover, a second pouring hole located on the bottom wall of the receiving groove and communicating with the receiving cavity, and located in the receiving groove to close the The third closure of the second pouring hole.
  • the beneficial effect of the utility model is that by using the lower cover, the enclosure, and the speaker unit to surround the rear cavity to form a perfusion cavity, the sound absorption powder can be poured into the perfusion cavity, thereby increasing the sound absorption powder perfusion in the speaker The area and volume of the material, so after the sound-absorbing powder is poured into the speaker, the low-frequency effect of the speaker is improved.
  • the loudspeaker includes an upper cover 1, a lower cover 2 that is connected to the upper cover 1 and encloses an accommodation space with the upper cover 1, and is accommodated in the accommodation space
  • the speaker unit 3 inside, which divides the housing space into a front cavity and a rear cavity opposite to the front cavity.
  • the lower cover 2 includes a bottom wall 21 and an enclosure 22 extending from the bottom wall 21 to the upper cover 1 ,
  • the speaker unit 3 is fixed to the enclosure 22, the bottom wall 21, the enclosure 22, and the speaker unit 3 cooperate in the rear cavity to isolate the perfusion cavity 4, the perfusion cavity 4 is filled with sound-absorbing powder, and the enclosure 22 is provided with There is an opening 222 connecting the rear cavity and the perfusion cavity 4 and a first air-permeable partition 7 sealing the opening 222.
  • the opening of the perfusion cavity 4 uses the space in the back cavity that has not been exploited in the prior art. Therefore, after the sound-absorbing powder is poured into the perfusion cavity 4, the perfusion area and perfusion of the sound-absorbing powder in the speaker are increased. Volume, thereby improving the low-frequency effect of the speaker.
  • the upper cover 1 is provided with a surrounding wall 221 at a position corresponding to the rear cavity, and a second air-permeable spacer 5 is provided on the surrounding wall 221.
  • the surrounding wall 221 and the second air-permeable spacer 5 cooperate to isolate the accommodating cavity 11 in the rear cavity. 11 is filled with sound-absorbing powder.
  • the opening of the accommodating cavity 11 and the filling cavity 4 increases the area where the sound absorbing powder is poured into the speaker. Therefore, after the sound absorbing powder is poured into the accommodating cavity 11 and the filling cavity 4, the low frequency effect of the speaker is improved.
  • the bottom wall 21 is provided with a communication hole 211 to communicate the filling cavity 4 with the outside; the bottom wall 21 is also provided with a first closing member 212 which closes the communication hole 211.
  • the perfusion cavity 4 can be connected with the outside, so that the perfusion cavity 4 can be filled with sound-absorbing powder after the perfusion cavity 4 is surrounded by the lower cover 2, the enclosure 22 and the speaker unit 3 Therefore, on the basis of the original containing cavity 11, the pouring area and pouring volume of the sound-absorbing powder in the speaker are increased.
  • the inner wall of the communication hole 211 is provided with a clamping groove 2111 with a width consistent with the thickness of the first closing member 212 in the circumferential direction, and the first closing member 212 is inserted in the circumferential direction to close the communication hole 211.
  • the first closing member 212 can be more stably assembled on the lower cover plate 2.
  • the sealing property between the inner walls of 211 is glued and sealed at the contact part of the first closing member 212 and the inner wall of the clamping groove 2111.
  • the first closing member 212 is arranged on the side of the inner wall of the communication hole 211 away from the upper cover plate 1, and there is a predetermined distance between the inner wall of the communication hole 211 and the end of the inner wall of the lower cover plate 2 away from the upper cover plate 1.
  • the first closing member 212 arranged in this way can make the first closing member 212 all located in the communicating hole 211 without protruding from the communicating hole 211 and forming a protrusion on the outer surface of the lower cover plate 2, thereby reducing transportation or handling of the speaker.
  • the probability of touching the first closure 212 at a time thus reducing the probability of a person’s skin being scratched by the first closure 212, and reducing the chance that the first closure 212 and the lower cover are often touched Probability of reduced assembly stability between plates 2.
  • the first closing member 212 is provided with a first filling hole 2121; the first closing member 212 is movably equipped with a second closing member 2122 that closes the first filling hole 2121; the second closing member 2122 is arranged far away from the first closing member 212
  • the predetermined distance on one side of the speaker unit 3 is greater than or equal to the thickness of the second closing member 2122.
  • Setting the predetermined distance to be greater than or equal to the thickness of the second closing member 2122 can prevent the second closing member 2122 from protruding from the communicating hole 211 and forming a protrusion on the surface of the lower cover plate 2, thereby reducing the contact during transportation or handling of the speaker.
  • the probability of the second closure member 2122 therefore, reduces the probability of a person’s skin being scratched by the second closure member 2122, and reduces frequent touching of the second closure member 2122 to make the second closure member 2122 and the first closure member 212 The probability of reduced assembly stability.
  • the second closing member 2122 is movably assembled on the first closing member 212.
  • the first closing member 212 is used to close the communicating hole 211, and then the first closing member 212
  • the first pouring hole 2121 is poured into the pouring cavity 4 with sound-absorbing powder.
  • the second closing member 2122 is moved to close the pouring cavity 4, thereby completing the sound-absorbing powder
  • the filling area and filling volume of the sound-absorbing powder in the loudspeaker are increased on the basis of the original accommodating cavity 11.
  • the first closing member 212 and the second closing member 2122 are integrally formed.
  • the sound absorbing powder is first poured into the pouring cavity 4, and then the first closing member 212 and the second closing member 212 are used.
  • the closing member 2122 closes the filling cavity 4, and the first closing member 212 and the second closing member 2122 are integrally formed, which can reduce the process of moving the second closing member 2122 during the pouring process of the sound-absorbing powder, thereby reducing the sound absorption
  • the powder pouring process improves the efficiency of sound-absorbing powder pouring.
  • a second air-permeable spacer 7 is also fixedly assembled on the side of the second surrounding wall 221 where the air-permeable opening 12 is opened.
  • the cross-sectional shape of the communication hole 211 in the direction perpendicular to the depth of the accommodating cavity 11 is consistent with the cross-sectional shape of the speaker unit 3 near the lower cover 2 in the direction perpendicular to the depth of the accommodating cavity 11.
  • This arrangement can increase the volume of the pouring cavity 4 in a limited space, and after the sound-absorbing powder is poured into the pouring cavity 4 to form a sound-absorbing layer, the sound-absorbing layer can be close to the speaker unit 3 and far away from the speaker unit.
  • the two ends have the same size, which improves the uniformity and regularity of the attraction layer. Therefore, it not only increases the perfusion area and volume of the sound-absorbing powder, but also improves the low-frequency effect of the speaker. .
  • the upper cover 1 has a receiving groove 12 recessed toward the lower cover 2, a second pouring hole 13 located on the bottom inner wall of the receiving groove 12 and communicating with the receiving cavity 11, and a third pouring hole 13 located in the receiving groove 12 to close the second pouring hole 13 Closure 14.
  • the arrangement of the accommodating groove 12 enables the third closing member 14 to house the third closing member 14 in the accommodating groove 12 after closing the second pouring hole 13, preventing the third closing member 14 from being formed on the surface of the upper cover plate 1. Protruding, thereby reducing the probability of touching the third closure member 14 when transporting or handling the speaker, thereby reducing the probability of a person’s skin being scratched by the third closure member 14, and reducing the chance of frequently touching the third closure member 14 so as to reduce the probability of the assembly stability between the third closing member 14 and the upper cover plate 1.
  • the bottom wall 21 is provided with a leakage hole 23 at a position where the second pouring hole 13 is opened relative to the upper cover plate 1, and is movably equipped with a fourth closing member 24 for sealing the leakage hole.
  • the principle of the speaker provided by the present utility model is as follows: the beneficial effect of the present utility model is that by using the lower cover 2, the enclosure 22, and the speaker unit 3 to form the perfusion cavity 4 in the rear cavity, the perfusion cavity 4 can be formed.
  • the sound-absorbing powder is filled inside, thereby increasing the area and volume of the sound-absorbing powder in the speaker. Therefore, after the sound-absorbing powder is poured into the speaker, the low-frequency effect of the speaker is improved.
  • the purpose of the utility model is to provide a loudspeaker that can make full use of the space in the rear cavity to fill the sound-absorbing powder, increase the area and volume of the sound-absorbing powder, and better improve the low-frequency performance.

Abstract

本实用新型提供了一种扬声器，包括上盖板、盖接于所述上盖板并与所述上盖板共同围成收容空间的下盖板以及收容于所述收容空间内的扬声器单体，所述扬声器单体将所述收容空间分隔成前腔和与所述前腔相对的后腔，所述下盖板包括底壁和自所述底壁向所述上盖板方向延伸的围合体，所述扬声器单体固定于所述围合体，所述底壁、所述围合体以及所述扬声器单体共同配合在所述后腔中隔离出灌注腔，所述灌注腔内填充有吸声粉料，所述围合体设有连通所述后腔与所述灌注腔的开口以及封合所述开口的第一透气隔离件；本实用新型增加了扬声器中灌注的吸声粉料的区域及体积，因此在将扬声器中灌注吸声粉料后，改善了扬声器的低频效果。

Description

一种扬声器 技术领域
本实用新型涉及电声转换器技术领域。
 背景技术
目前为提升扬声器的低频性能，通常会在扬声器的后腔中填充吸声粉料用来吸声从而改善低频。
 技术问题
现有结构的扬声器并没有充分利用后腔空间填充吸声粉料，制约了吸声粉料的填充区域及体积，导致扬声器的低频效果改善受限。
 技术解决方案
一种扬声器，包括上盖板、盖接于所述上盖板并与所述上盖板共同围成收容空间的下盖板以及收容于所述收容空间内的扬声器单体，所述扬声器单体将所述收容空间分隔成前腔和与所述前腔相对的后腔，所述下盖板包括底壁和自所述底壁向所述上盖板方向延伸的围合体，所述扬声器单体固定于所述围合体，所述底壁、所述围合体以及所述扬声器单体共同配合在所述后腔中隔离出灌注腔，所述灌注腔内填充有吸声粉料，所述围合体设有连通所述后腔与所述灌注腔的开口以及封合所述开口的第一透气隔离件。
 有益效果
通过使用下盖板、围合体、及扬声器单体在后腔内围合成灌注腔，能够在灌注腔内灌注吸声粉料，从而增加了扬声器中灌注吸声粉料的区域及体积，因此在将扬声器中灌注吸声粉料后，改善了扬声器的低频效果。
 附图说明
图1为本实用新型实施例扬声器的结构示意图；
图2为本实用新型实施例扬声器的爆炸图；
图3为本实用新型实施例扬声器另一视角的爆炸图；
图4为本图1中沿A-A方向的剖视图。
 本发明的最佳实施方式
一种扬声器，包括上盖板、盖接于所述上盖板并与所述上盖板共同围成收容空间的下盖板以及收容于所述收容空间内的扬声器单体，所述扬声器单体将所述收容空间分隔成前腔和与所述前腔相对的后腔，所述下盖板包括底壁和自所述底壁向所述上盖板方向延伸的围合体，所述扬声器单体固定于所述围合体，所述底壁、所述围合体以及所述扬声器单体共同配合在所述后腔中隔离出灌注腔，所述灌注腔内填充有吸声粉料，所述围合体设有连通所述后腔与所述灌注腔的开口以及封合所述开口的第一透气隔离件。
进一步地，所述上盖板对应所述后腔位置设置有围壁，所述围壁上设置有第二透气隔离件，所述围壁和所述第二透气隔离件配合在所述后腔中隔离出容纳腔，所述容纳腔内填充有吸声粉料。
进一步地，所述底壁上开设有连通孔将所述灌注腔与外界相连通；所述底壁上还设置有将所述连通孔封闭的第一封闭件；
进一步地，所述连通孔的内壁周向开设有宽度与所述第一封闭件厚度一致的具有使所述第一封闭件周向均插入后将所述连通孔封闭的卡接槽。
进一步地，所述第一封闭件设置在所述连通孔内壁远离所述上盖板的一侧，与所述连通孔内壁位于所述下盖板远离所述上盖板一侧内壁的端部之间存在预定距离。
进一步地，所述第一封闭件上开设有第一灌注孔；所述第一封闭件上活动装配有将所述第一灌注孔封闭的第二封闭件；所述第二封闭件设置在所述第一封闭件远离所述扬声器单体的一侧，所述预定距离大于或等于所述第二封闭件的厚度。
进一步地，所述连通孔在垂直于所述容纳腔深度方向上的截面形状与所述扬声器单体靠近所述下盖板一侧在垂直于所述容纳腔深度方向上的截面形状一致。
进一步地，所述上盖板具有朝向所述下盖板凹陷的容纳槽、位于所述容纳槽的底壁与所述容纳腔连通的第二灌注孔，及位于所述容纳槽内封闭所述第二灌注孔的第三封闭件。
本实用新型的有益效果在于：通过使用下盖板、围合体、及扬声器单体在后腔内围合成灌注腔，能够在灌注腔内灌注吸声粉料，从而增加了扬声器中灌注吸声粉料的区域及体积，因此在将扬声器中灌注吸声粉料后，改善了扬声器的低频效果。
 本发明的实施方式
如图1-4所示，本申请提供一种扬声器，扬声器包括上盖板1、盖接于上盖板1并与上盖板1共同围成收容空间的下盖板2以及收容于收容空间内的扬声器单体3，扬声器单体3将收容空间分隔成前腔和与前腔相对的后腔，下盖板2包括底壁21和自底壁21向上盖板1方向延伸的围合体22，扬声器单体3固定于围合体22，底壁21、围合体22以及扬声器单体3共同配合在后腔中隔离出灌注腔4，灌注腔4内填充有吸声粉料，围合体22设有连通后腔与灌注腔4的开口222以及封合开口222的第一透气隔离件7。
灌注腔4的开设，使用了现有技术中未开发利用的后腔中的空间，因此在向灌注腔4内灌注吸声粉料后，即增加了扬声器内吸声粉料的灌注区域及灌注体积，从而改善了扬声器的低频效果。
上盖板1对应后腔位置设置有围壁221，围壁221上设置有第二透气隔离件5，围壁221和第二透气隔离件5配合在后腔中隔离出容纳腔11，容纳腔11内填充有吸声粉料。
容纳腔11及灌注腔4的开设，增加了扬声器内灌注吸声粉料的区域，因此在向容纳腔11及灌注腔4内灌注吸声粉料后，改善了扬声器的低频效果。
底壁21上开设有连通孔211将灌注腔4与外界相连通；底壁21上还设置有将连通孔211封闭的第一封闭件212。
通过开设连通孔211，能够将灌注腔4与外界连通，从而可以在灌注腔4下盖板2、围合体22及扬声器单体3围合成灌注腔4后，向灌注腔4内灌注吸声粉料，因此在原有的容纳腔11的基础上，增加了扬声器内吸声粉料的灌注区域及灌注体积。连通孔211的内壁周向开设有宽度与第一封闭件212厚度一致的具有使第一封闭件212周向均插入后将连通孔211封闭的卡接槽2111。
通过在连通孔211的内壁周向开设卡接槽2111，能够使得第一封闭件212与连通孔211内壁的接触面积，从而增加了第一封闭件212与连通孔211内壁之间的摩擦力，因此使得第一封闭件212能够更加稳定地装配在下盖板2上，在本实施例中，为了进一步增加第一封闭件212及下盖板2装配的稳定性且第一封闭件212及连通孔211内壁之间的密封性，在第一封闭件212及卡接槽2111的内壁接触的部位进行打胶密封。
第一封闭件212设置在连通孔211内壁远离上盖板1的一侧，与连通孔211内壁位于下盖板2远离上盖板1一侧内壁的端部之间存在预定距离。
这样设置的第一封闭件212，能够使得第一封闭件212均位于连通孔211内，不会凸出连通孔211而在下盖板2的外表面形成凸起，从而降低了运输或拿放扬声器时触碰第一封闭件212的几率，因此降低了人的皮肤被第一封闭件212划破的几率，并且降低了因经常触碰第一封闭件212而使得第一封闭件212与下盖板2之间装配稳定性降低的几率。
第一封闭件212上开设有第一灌注孔2121；第一封闭件212上活动装配有将第一灌注孔2121封闭的第二封闭件2122；第二封闭件2122设置在第一封闭件212远离扬声器单体3的一侧，预定距离大于或等于第二封闭件2122的厚度。
将预定距离设置为大于或等于第二封闭件2122的厚度，能够防止第二封闭件2122凸出连通孔211而在下盖板2的表面形成凸起，从而降低了运输或拿放扬声器时触碰第二封闭件2122的几率，因此降低了人的皮肤被第二封闭件2122划破的几率，并且降低了经常触碰第二封闭件2122而使得第二封闭件2122与第一封闭件212之间装配稳定性降低的几率。
在本实施例中，第二封闭件2122活动装配在第一封闭件212上，在灌注吸声粉料时，先使用第一封闭件212将连通孔211封闭，随后通过第一封闭件212上的第一灌注孔2121向灌注腔4内灌注吸声粉料，在将灌注腔4内灌注吸声粉料后，活动第二封闭件2122，将灌注腔4封闭，从而完成吸声粉料的灌注工序，此时即在原有的容纳腔11的基础上，增加了扬声器内吸声粉料的灌注区域及灌注体积，通过将第二封闭件2122活动装配在第一封闭件212上的方式，能够使得灌注腔4内充分灌注吸声粉料，提升了灌注腔4内空间的使用效率，因此改善了扬声器的低频效果。
在其他实施例中，第一封闭件212及第二封闭件2122一体成型，在灌注吸声粉料时，先向灌注腔4内灌注吸声粉料，随后使用第一封闭件212及第二封闭件2122将灌注腔4封闭，通过第一封闭件212及第二封闭件2122一体成型的方式，能够减少吸声粉料的灌注工序中活动第二封闭件2122的工序，因此减少了吸声粉料的灌注流程，提升了吸声粉料的灌注效率。
在第二围壁221开设透气开口12的一侧还固定装配有第二透气隔离件7。
连通孔211在垂直于容纳腔11深度方向上的截面形状与扬声器单体3靠近下盖板2一侧在垂直于容纳腔11深度方向上的截面形状一致。这样设置，能够在有限的空间内，增加灌注腔4的体积，并且在吸声粉料在灌注进灌注腔4而形成吸音层后，能够使得吸音层在靠近扬声器单体3及远离扬声器单体3两端尺寸一致，从而提高了吸引层的均匀及规则性，因此不仅增加吸声粉料的灌注区域及灌注体积，而且改善了扬声器的低频效果。。
上盖板1具有朝向下盖板2凹陷的容纳槽12、位于容纳槽12的底内壁与容纳腔11连通的第二灌注孔13，及位于容纳槽12内封闭第二灌注孔13的第三封闭件14。
容纳槽12的设置，能够使得第三封闭件14在封闭第二灌注孔13后，将第三封闭件14容置于容纳槽12内，防止第三封闭件14在上盖板1的表面形成凸起，从而降低了运输或拿放扬声器时触碰第三封闭件14的几率，因此降低了人的皮肤被第三封闭件14划破的几率，并且降低了因经常触碰第三封闭件14而使得第三封闭件14与上盖板1之间装配稳定性降低的几率。
底壁21相对上盖板1开设第二灌注孔13的部位开设有泄露孔23，并活动装配有将所述泄露孔封闭的第四封闭件24。
本实用新型提供的扬声器，其原理如下：本实用新型的有益效果在于：通过使用下盖板2、围合体22、及扬声器单体3在后腔内围合成灌注腔4，能够在灌注腔4内灌注吸声粉料，从而增加了扬声器中灌注吸声粉料的区域及体积，因此在将扬声器中灌注吸声粉料后，改善了扬声器的低频效果。
以上所述的仅是本实用新型的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。
 工业实用性
本实用新型的目的是提供一种可以充分利用后腔空间填充吸声粉料，增加填充吸声粉料的区域及体积，更好地改善低频性能的扬声器。

Claims (8)

  1. 一种扬声器，包括上盖板、盖接于所述上盖板并与所述上盖板共同围成收容空间的下盖板以及收容于所述收容空间内的扬声器单体，所述扬声器单体将所述收容空间分隔成前腔和与所述前腔相对的后腔，所述下盖板包括底壁和自所述底壁向所述上盖板方向延伸的围合体，所述扬声器单体固定于所述围合体，所述底壁、所述围合体以及所述扬声器单体共同配合在所述后腔中隔离出灌注腔，所述灌注腔内填充有吸声粉料，所述围合体设有连通所述后腔与所述灌注腔的开口以及封合所述开口的第一透气隔离件。
  2. 根据权利要求1所述的扬声器，其特征在于，所述上盖板对应所述后腔位置设置有围壁，所述围壁上设置有第二透气隔离件，所述围壁和所述第二透气隔离件配合在所述后腔中隔离出容纳腔，所述容纳腔内填充有吸声粉料。
  3. 根据权利要求1所述的扬声器，其特征在于，
    所述底壁上开设有连通孔将所述灌注腔与外界相连通；
    所述底壁上还设置有将所述连通孔封闭的第一封闭件。
  4. 根据权利要求3所述的扬声器，其特征在于，
    所述连通孔的内壁周向开设有宽度与所述第一封闭件厚度一致的具有使所述第一封闭件周向均插入后将所述连通孔封闭的卡接槽。
  5. 根据权利要求3所述的扬声器，其特征在于，
    所述第一封闭件设置在所述连通孔内壁远离所述上盖板的一侧，与所述连通孔内壁位于所述下盖板远离所述上盖板一侧内壁的端部之间存在预定距离。
  6. 根据权利要求5所述的扬声器，其特征在于，
    所述第一封闭件上开设有第一灌注孔；
    所述第一封闭件上活动装配有将所述第一灌注孔封闭的第二封闭件；
    所述第二封闭件设置在所述第一封闭件远离所述扬声器单体的一侧，所述预定距离大于或等于所述第二封闭件的厚度。
  7. 根据权利要求3所述的扬声器，其特征在于，
    所述连通孔在垂直于所述容纳腔深度方向上的截面形状与所述扬声器单体靠近所述下盖板一侧在垂直于所述容纳腔深度方向上的截面形状一致。
  8. 根据权利要求1所述的扬声器，其特征在于，
    所述上盖板具有朝向所述下盖板凹陷的容纳槽、位于所述容纳槽的底壁与所述容纳腔连通的第二灌注孔，及位于所述容纳槽内封闭所述第二灌注孔的第三封闭件。
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