WO2016101830A1 - 一种开放式耳机 - Google Patents

一种开放式耳机 Download PDF

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Publication number
WO2016101830A1
WO2016101830A1 PCT/CN2015/097614 CN2015097614W WO2016101830A1 WO 2016101830 A1 WO2016101830 A1 WO 2016101830A1 CN 2015097614 W CN2015097614 W CN 2015097614W WO 2016101830 A1 WO2016101830 A1 WO 2016101830A1
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WO
WIPO (PCT)
Prior art keywords
open
hole
sound
headphone
tuning
Prior art date
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PCT/CN2015/097614
Other languages
English (en)
French (fr)
Inventor
黄孟
段秀华
张文来
Original Assignee
青岛歌尔声学科技有限公司
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Application filed by 青岛歌尔声学科技有限公司 filed Critical 青岛歌尔声学科技有限公司
Priority to JP2017534335A priority Critical patent/JP6475844B2/ja
Priority to CA2965411A priority patent/CA2965411C/en
Priority to EP15871898.1A priority patent/EP3200474A4/en
Priority to SG11201703482UA priority patent/SG11201703482UA/en
Priority to US15/522,411 priority patent/US10264342B2/en
Publication of WO2016101830A1 publication Critical patent/WO2016101830A1/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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • 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
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material 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
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2846—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2849—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material 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
    • H04R5/00—Stereophonic arrangements
    • H04R5/033—Headphones for stereophonic communication
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/11—Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion

Definitions

  • the invention relates to an open earphone.
  • Closed earphones refer to the closed acoustic cavity structure design, which encloses the sound emitted by the earphones in the space between the earphone casing and the human ear, and the neighboring person does not easily hear the sound emitted by the earphone; Concentrating the sound from the earphones to the ear canal enhances the effect of the bass, but the sound of the headphones is too concentrated in the center of the head, which is not easy to feel the sound field. At the same time, it is easy to cause fatigue and even damage the hearing. .
  • the sound emitted by the earphones can be partially heard by neighboring people, the sound will not be concentrated in the center of the head, the sound field is open and natural, and it is not easy to fatigue when used for a long time, but Can't have good bass performance.
  • an open type earphone that has the advantages of both closed and open earphones, and has a high quality bass performance on the basis of wide open sound field, long-term use, which is not easy to cause fatigue and is not easy to damage the human ear. And the entire earphone structure is light and small, easy to carry and use.
  • the invention provides an open earphone, which has a wide sound field, is not easy to be fatigued for a long time, and is not easy to cause damage to human hearing, especially has high quality bass performance, and has a light structure and is convenient to carry and use.
  • an open type earphone comprising a front cover, a horn unit and a rear case which are arranged from the front to the rear, and the front cover has a plurality of sound holes.
  • a front cavity of the earphone is formed between the front cover and the speaker unit, and a rear cavity of the earphone is formed between the speaker unit and the rear case, and an outlet hole for guiding the speaker wire is arranged on the rear case, and the speaker unit has a magnet portion and a magnet portion.
  • a diaphragm on the front side a central portion of the magnet portion has a horn hole penetrating forward and backward
  • the rear case is further provided with a sound guiding tube inside the earphone, and a rear end of the sound guiding tube communicates with an external space of the earphone, the front end Inserted in the bore of the horn and at a distance from the diaphragm, and the distance is greater than the maximum vibration displacement of the diaphragm.
  • the open earphone of the present invention has the advantages that the sound field is open and natural, and the long-term use is not easy to cause fatigue and is not easy to damage the hearing of the human ear, and at the same time, by providing a sound guiding tube on the back casing of the earphone, The back wave of the single speaker action is transmitted to the ear canal of the human ear to achieve the effect of compensating the bass, so that the open earphone can have high quality bass performance; in addition, the sound guide tube has a certain length and diameter, which can be quickly and appropriately The back wave is discharged from the human ear and has the function of balancing the airflow, which further improves the effect of not being fatigued for a long time of use; further, since the front end of the sound guiding tube is directly inserted into the middle hole of the horn unit, It can reduce the volume of the back cavity of the earphone, making the whole earphone structure light and small, and can be used as a portable earphone.
  • FIG. 1 is a schematic structural diagram of an open earphone according to an embodiment of the present invention.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • Figure 3 is an exploded structural view of Figure 1;
  • FIG. 4 is a schematic structural view of a rear case of an earphone according to an embodiment of the present invention.
  • FIG. 5 is a comparison diagram of a frequency response curve (shown by a broken line) of an open earphone with an open earphone according to an embodiment of the present invention.
  • an open earphone includes a front cover 1, a horn unit 2 and a rear case 3 which are disposed from the front to the rear.
  • the front cover 1 is provided with a plurality of sound holes 1.1, and the opening ratio is about 40%-60%, and the earphone front cavity 4 is formed between the front cover 1 and the speaker unit 2, and the earphone rear cavity 5 is formed between the speaker unit 2 and the rear case 3.
  • the rear case 3 and the horn unit 2 are connected by a sealing ring 7, and the front cover 1 is covered with a layer of damping adjustable sponge 6, and the sponge 6 is covered with a soft cloth ear cover 8 to Protecting the human ear and improving wearing comfort;
  • the rear shell 3 is provided with an outlet hole 3.1 for guiding the speaker wire, and a sealing structure such as a sealant or a sealing ring is arranged in the gap between the outlet hole 3.1 and the speaker wire, etc.
  • the outlet hole 3.1 is sealed to prevent sound from leaking;
  • the horn unit 2 has a magnet portion 2.1 and a diaphragm 2.2 at the front end of the magnet portion 2.1.
  • the central portion of the magnet portion 2.1 has a horn hole 2.3, and the horn hole 2.3 is at the magnet portion.
  • 2.1 is connected to the front and rear, that is, the front end of the speaker is connected with the front cavity of the speaker unit 2 (the front cavity of the speaker refers to the inside of the speaker, the space below the diaphragm is separated from the speaker frame and the magnet), the rear end and the earphone
  • the rear chamber 5 is connected.
  • a sound guiding tube 3.2 is further disposed on the rear case 3.
  • the sound guiding tube 3.2 is located inside the earphone, and the rear end thereof is connected with the outer space of the earphone, and the front end is inserted in the speaker.
  • the front end is separated from the diaphragm 2.2 by a certain distance, that is, the front end is located inside the hole 2.3 of the horn, and does not pass through the hole 2.3 of the horn, and the distance should be greater than the maximum vibration displacement of the diaphragm 2.2, Preventing the diaphragm 2.2 from touching the diaphragm 2.2 at the front end of the diaphragm 3.2 causes damage to the diaphragm 2.2.
  • the open earphone of the embodiment by providing the sound guiding tube 3.2 on the rear case 3, the back wave of the action of the speaker unit 2 can be concentratedly transmitted to the ear canal of the human ear to achieve the effect of compensating the bass, so that the open earphone can have The high-quality bass performance can be seen from the comparison of the measured frequency response curve of the open earphone (shown by the solid line) and the frequency response curve (shown by the broken line) of the conventional open earphone in the embodiment of the present invention.
  • the open-type earphone has superior bass performance compared to the conventional open-type earphone; in addition, the sound guiding tube 3.2 has a certain length and diameter, and can quickly and appropriately discharge the back wave to the human ear, and has the function of balancing airflow. Will further improve the long-term use is not easy to produce fatigue; in addition, because the front end of the sound tube 3.2 directly into the speaker hole 2.3, The size of the back cavity 5 of the earphone can be reduced, so that the entire earphone structure is light and small.
  • the rear end of the sound guiding tube 3.2 is located at the center of the rear case 3, and is concentrically arranged with the hole 2.3 in the horn.
  • the sound guiding tube 3.2 can be a straight tube or a curved tube, and only needs to ensure that the front end thereof is inserted into the hole 2.3 of the horn.
  • the sound guiding tube 3.2 should preferably be a straight tube to facilitate processing and save space of the back cavity 5 of the earphone. .
  • the distance between the front end of the sound guiding tube 3.2 and the diaphragm 2.2 is preferably 2 mm to 4 mm.
  • the diameter of the hole 2.3 in the horn is preferably 3 mm to 8 mm, and the outer diameter of the sound tube 3.2 may be in the range of 2 mm to 6 mm, and the length may be 5 mm to 20 mm.
  • the rear casing 3 is further provided with a tuning hole 3.3, and the tuning hole 3.3 can be attached with different damping tuning materials according to different sound quality requirements, such as a tuning mesh cloth or a tuning paper, which is covered by the tuning material.
  • Sound hole 3.3 to improve the frequency response and distortion level of the earphone in certain frequency bands, the diameter of the tuning hole 3.3 is preferably 4mm-5mm.
  • the left and right earphones have the same frequency response.
  • the number of tuning holes 3.3 is two, and the center of the rear casing 3 is symmetrically set at the base point.

Abstract

本发明提供一种开放式耳机，包括前盖、喇叭单体和后壳，前盖与喇叭单体之间形成耳机前腔，喇叭单体和后壳之间形成耳机后腔，前盖上设置有若干出声孔，喇叭单体具有前后贯通的喇叭中孔，后壳上还设置有导音管，导音管的后端与耳机外部空间连通，前端插设在喇叭中孔内并与振膜之间相距一定距离，且该距离大于振膜的最大振动位移。本发明开放式耳机在其自身所具有的声场开阔自然，长时间使用不易产生疲劳且不易对人耳听力造成损害等优点的基础上具有优质低音表现，且导音管前端插入喇叭中孔中，能够缩小耳机后腔体积，使整个耳机轻小便携。

Description

一种开放式耳机 技术领域
本发明涉及开放式耳机。
发明背景
随着科技的进步，以及各种影音播放产品的普及，人们对声音品质的要求也越来越高，相应地对耳机音质的要求也越来越高。具体表现在，除了要求耳机具有高、中、低层次分明以及剧院般的缭绕四周的音质表现外，还希望即使长时间使用耳机，也不会产生疲劳感，不易对人耳听力造成损害。
目前耳机从结构上区分，大体可以分为封闭式和开放式两种。封闭式耳机，是指采用封闭式声腔结构设计，将耳机单体所发出的声音封闭在耳机壳内与人耳间的空间中，邻近的人不易听到耳机所发出的声音；其优点在于，将耳机单体发出的声音集中到耳道口，强化了低音的效果，但耳机声音过于集中于头部中央，不易有声场缭绕的感觉，同时长时间使用容易使人产生疲劳，甚至损害人的听力。相对地，开放式耳机，则是将耳机单体所发出的声音可局部地让邻近的人听到，声音不会被集中在头部中央，声场开阔自然，长时间使用也不易产生疲劳，但无法有优质的低音表现。
现有技术中，为使开放式开机具有较好的低音表现，一般将耳机后腔空间加大或者采用直径比较大的喇叭单体，这样会导致耳机整体尺寸加大，不利于耳机的轻型和小型设计。
因此，亟待设计一种兼具封闭式与开放式耳机的优点的开放式耳机，在其声场开阔自然，长时间使用不易产生疲劳且不易对人耳听力造成损害的基础上，具有优质的低音表现，且整个耳机结构轻小，便于携带和使用。
发明内容
本发明提供一种开放式耳机，声场开阔自然，长时间使用不易产生疲劳且不易对人耳听力造成损害，尤其是具有优质的低音表现，且结构轻小，便于携带和使用。
为达到解决上述技术问题的目的，本发明采用以下技术方案予以实现：一种开放式耳机，包括由前向后设置的前盖、喇叭单体和后壳，前盖上具有若干出声孔，前盖与喇叭单体之间形成有耳机前腔，喇叭单体和后壳之间形成有耳机后腔，后壳上设有引出喇叭线的出线孔，喇叭单体具有磁铁部和位于磁铁部前侧的振膜，磁铁部的中心部位具有前后贯通的喇叭中孔，所述后壳上还设置有位于耳机内部的导音管，所述导音管的后端与耳机外部空间连通，前端插设在所述喇叭中孔内并与所述振膜之间相距一定距离，且该距离大于所述振膜的最大振动位移。
与现有技术相比，本发明开放式耳机，其本身具有声场开阔自然，长时间使用不易产生疲劳且不易对人耳听力造成损害的优点，同时通过在耳机后壳上设置导音管，能够将喇叭单体动作的背波集中传至人耳耳道口达到补偿低音的效果，使开放式耳机能够具有优质的低音表现；另外，导音管具有一定的长度与管径，可迅速适量地将背波排出人耳，具有平衡气流的作用，也会进一步提高长时间使用不易产生疲劳的效果；再者，由于导音管前端直接插入喇叭单体的中孔中, 能够缩小耳机后腔的体积，使整个耳机结构轻小, 可用作便携式耳机。
结合附图阅读本发明实施方式的详细描述后，本发明的其他特点和优点将变得更加清楚。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明实施例一起用于解释本发明，并不构成对本发明的限制。在附图中：
图1为本发明实施例开放式耳机的结构示意图；
图2为图1的A-A向剖视图；
图3为图1的分解结构图；
图4为本发明实施例中耳机的后壳结构示意图；
图5为采用本发明实施例开放式耳机实测频响曲线（实线所示）与现有普通开放式耳机的频响曲线（虚线所示）对比图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面结合附图对本发明的具体实施方式作进一步详细地说明。
参照图1至图4，一种开放式耳机，包括由前向后设置的前盖1、喇叭单体2和后壳3，前盖1上设置有若干出声孔1.1，开孔率约为40%-60%，且前盖1与喇叭单体2之间形成有耳机前腔4，喇叭单体2和后壳3之间形成有耳机后腔5。同现有技术，后壳3与喇叭单体2之间通过密封圈7连接，前盖1上覆盖一层阻尼可调的海绵6，海绵6上包裹一层柔软的布织耳套8，以保护人耳听力并提高佩戴舒适性；后壳3上设有用于引出喇叭线的出线孔3.1，出线孔3.1与喇叭线之间的缝隙内设置有密封结构，比如密封胶或密封圈等，以使出线孔3.1密封，防止声音由此泄露；喇叭单体2具有磁铁部2.1和位于磁铁部2.1前端的振膜2.2，磁铁部2.1的中心部位具有喇叭中孔2.3，喇叭中孔2.3在磁铁部2.1上前后贯通，即其前端与喇叭单体2的喇叭前腔连通（此处的喇叭前腔指的是喇叭内部，振膜以下与喇叭盆架、磁体隔成的空间），后端与耳机后腔5连通。为提高开放式耳机的低音表现效果，本实施例中在后壳3上还设置有导音管3.2，导音管3.2位于耳机内部，其后端与耳机的外部空间连通，前端插设在喇叭中孔2.3内，并且前端与振膜2.2之间相距一定距离，即前端位于喇叭中孔2.3的内部，不穿出于喇叭中孔2.3，同时该距离应大于振膜2.2的最大振动位移，以防止振膜2.2在最大振动位移时导音管3.2的前端触碰到振膜2.2导致振膜2.2损坏。
采用本实施例开放式耳机，通过在后壳3上设置导音管3.2，能够将喇叭单体2动作的背波集中传至人耳耳道口达到补偿低音的效果，以使开放式耳机能够具有优质的低音表现，从图5本发明实施例开放式耳机实测频响曲线（实线所示）与现有普通开放式耳机的频响曲线（虚线所示）对比图中可以看出，本实施例开放式耳机相比现有普通开放式耳机具有优质的低音表现；另外，导音管3.2具有一定的长度与管径，可迅速适量地将背波排出人耳，具有平衡气流的作用，也会进一步提高长时间使用不易产生疲劳的效果；再者，由于导音管3.2前端直接插入喇叭中孔2.3中, 能够缩小耳机后腔5的体积，使整个耳机结构轻小, 可用作便携式耳机，避免了现有技术中开放式耳机通过增加耳机后腔空间及采用直径比较大的喇叭单体来补偿低音所导致的耳机整体尺寸增大的问题。
为便于加工，导音管3.2的后端位于后壳3的中心部位，与喇叭中孔2.3同心设置。导音管3.2可以是直管或弯管，只需保证其前端插入喇叭中孔2.3内即可，当然，导音管3.2宜优选为直管，以方便加工，并节省耳机后腔5的空间。
具体地，导音管3.2的前端与振膜2.2之间距离以2mm-4mm为宜。
具体地，喇叭中孔2.3的直径以3mm-8mm为宜，导音管3.2的外径可以在2mm-6mm范围内取值，长度可以为5mm-20mm。
进一步地，后壳3上还设置有调音孔3.3，调音孔3.3上可根据不同音质的要求粘贴不同阻尼的调音材料，比如调音网布或调音纸，由调音材料覆盖调音孔3.3，来改善耳机在某些频段的频率响应以及失真水平，调音孔3.3的直径以4mm-5mm为宜。
为便于加工，同时使左、右耳机频响一致，本实施例中调音孔3.3数量为两个，以后壳3的中心为基点对称设置。
以上实施例仅用以说明本发明的技术方案，而非对其进行限制；尽管参照前述实施例对本发明进行了详细的说明，对于本领域的普通技术人员来说，依然可以对前述实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或替换，并不使相应技术方案的本质脱离本发明所要求保护的技术方案的精神和范围。

Claims (10)

  1. 一种开放式耳机，包括由前向后设置的前盖（1）、喇叭单体（2）和后壳（3），前盖（1）上具有若干出声孔（1.1），前盖（1）与喇叭单体（2）之间形成有耳机前腔（4），喇叭单体（2）和后壳（3）之间形成有耳机后腔（5），后壳（3）上设有引出喇叭线的出线孔（3.1），喇叭单体（2）具有磁铁部（2.1）和位于磁铁部（2.1）前侧的振膜（2.2），磁铁部（2.1）的中心部位具有前后贯通的喇叭中孔（2.3），其特征在于：所述后壳（3）上还设置有位于耳机内部的导音管（3.2），所述导音管（3.2）的后端与耳机外部空间连通，前端插设在所述喇叭中孔（2.3）内并与所述振膜（2.2）之间相距一定距离，且该距离大于所述振膜（2.2）的最大振动位移。
  2. 根据权利要求1所述的开放式耳机，其特征在于：所述导音管（3.2）的后端位于所述后壳（3）的中心部位，与所述喇叭中孔（2.3）同心设置。
  3. 根据权利要求2所述的开放式耳机，其特征在于：所述导音管（3.2）为直管。
  4. 根据权利要求1所述的开放式耳机，其特征在于：所述导音管（3.2）的前端与所述振膜（2.2）之间距离为2mm-4mm。
  5. 根据权利要求1至4中任一项所述的开放式耳机，其特征在于：所述喇叭中孔（2.3）的直径为3mm-8mm，所述导音管（3.2）的外径为2mm-6mm，长度为5mm -20mm。
  6. 根据权利要求5所述的开放式耳机，其特征在于：所述后壳（3）上还设置有调音孔（3.3），所述调音孔（3.3）上覆盖有调音材料。
  7. 根据权利要求6所述的开放式耳机，其特征在于：所述调音孔（3.3）数量为两个，以所述后壳（3）的中心为基点对称设置。
  8. 根据权利要求6所述的开放式耳机，其特征在于：所述调音材料为调音网布或调音纸。
  9. 根据权利要求6所述的开放式耳机，其特征在于：所述调音孔（3.3）的直径为4mm-5mm。
  10. 根据权利要求1所述的开放式耳机，其特征在于：所述出线孔（3.1）与由其内引出的喇叭线之间的缝隙内设置有密封结构。　
PCT/CN2015/097614 2014-12-24 2015-12-16 一种开放式耳机 WO2016101830A1 (zh)

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