WO2019120134A1 - 一种蓝牙耳机 - Google Patents

一种蓝牙耳机 Download PDF

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Publication number
WO2019120134A1
WO2019120134A1 PCT/CN2018/121065 CN2018121065W WO2019120134A1 WO 2019120134 A1 WO2019120134 A1 WO 2019120134A1 CN 2018121065 W CN2018121065 W CN 2018121065W WO 2019120134 A1 WO2019120134 A1 WO 2019120134A1
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Prior art keywords
antenna
housing
bluetooth
earphone
metal
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PCT/CN2018/121065
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English (en)
French (fr)
Inventor
刘峻
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深圳市可信华成通信科技有限公司
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Publication of WO2019120134A1 publication Critical patent/WO2019120134A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • 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

Definitions

  • the utility model relates to an earphone, and more particularly to a Bluetooth earphone.
  • the traditional Bluetooth antenna design is to place a wire in the product or attach an FPC (flexible circuit board) inside, and adjust the resonance of the Bluetooth antenna by adjusting the length of the wire (FPC line).
  • FPC flexible circuit board
  • the technical problem to be solved by the present invention is to provide a Bluetooth earphone for the above-mentioned drawbacks of the prior art.
  • the technical solution adopted by the utility model to solve the technical problem is: constructing a Bluetooth earphone, comprising an earphone housing and a Bluetooth antenna; the earphone housing is a plastic piece; the Bluetooth antenna comprises a surface disposed on the earphone housing a metal radiating arm, and a metal feed point disposed on an inner surface of the earphone housing and electrically connected to the metal radiating arm.
  • the Bluetooth antenna comprises an outer surface disposed on the earphone housing.
  • the Bluetooth antenna comprises a laser direct antenna.
  • the surface of the metal radiant arm is provided with fuel injection.
  • the fuel injection has a thickness of from 115 ⁇ m to 156 ⁇ m.
  • the earphone housing comprises a first housing and a second housing, the second housing is provided with an in-ear end, and the Bluetooth antenna is disposed on the first housing.
  • the Bluetooth antenna is disposed at a lower portion of the first housing.
  • the outer surface of the first casing is a first-order design surface.
  • the feed point comprises an electrical feed point and a ground feed point, both connected to the metal radiating arm.
  • the electric feeding point and the ground feeding point are respectively connected to the metal radiating arm through a blind hole of laser engraving.
  • a Bluetooth earphone embodying the present invention has the following beneficial effects: by designing the metal radiating arm of the antenna to be designed on the surface of the earphone, the receiving and receiving efficiency of the antenna can be improved while the volume of the earphone is reduced, and the user experience is improved.
  • FIG. 1 is a schematic structural view of an embodiment of a Bluetooth headset of the present invention
  • Figure 2 is a first partial structural view of Figure 1;
  • Figure 3 is a second partial structural view of Figure 1;
  • FIG. 4 is a diagram showing the results of an antenna standing wave test of an embodiment.
  • the Bluetooth headset includes a headphone housing and a Bluetooth antenna 20; the earphone housing is a plastic part; and the Bluetooth antenna 20 includes a headphone housing.
  • the prior art Bluetooth earphone is usually an outer casing made of plastic material and a space inside the casing.
  • the shape of the casing is designed according to the shape of the ear channel inlet, and the casing inner space is for placing the earphone circuit unit.
  • the antenna 20 can be designed on the earphone body, and then a circuit unit connected to the inside of the earphone is provided on the earphone body, which can save space for the antenna 20.
  • the metal radiating arm 21 of the antenna is disposed on the surface of the plastic casing, wherein the surface may include an inner surface and an outer surface of the plastic casing to ensure the radiation performance of the antenna 20, and the antenna 20 is used for the earphone circuit unit.
  • the connected metal feed points 22, 23 are disposed on the inner surface of the plastic casing to facilitate the connection of the antenna 20 with the earphone circuit unit, and also ensure the aesthetics of the earphone. It can be understood that the metal feed points 22, 23 and the radiation arm 21 pass through the inside of the housing and are electrically connected. It will also be appreciated that when the antenna 20 is provided with the inner surface of the plastic housing, the metal feed points 22, 23 and the radiating arm 21 may be directly conductively connected to the inner surface.
  • the Bluetooth antenna includes an outer surface disposed on the earphone housing.
  • the metal radiating arm 21 of the antenna may be disposed on the outer surface of the plastic casing to further improve the radiation performance of the antenna 20.
  • the Bluetooth antenna 20 includes a laser shaped antenna.
  • the antenna 20 is designed on the surface of the casing, so that the antenna 20 can be integrated into the casing, and the antenna 20 can be easily routed. It affects the radiation of the antenna 20 and saves space.
  • the LDS antenna scheme is only a preferred solution for the outer surface antenna process, and other similar surface antenna designs can be used in some embodiments.
  • the surface of the metal radiation arm 21 is provided with fuel injection.
  • the antenna 20 of the antenna 20 disposed on the surface of the casing is made of metal.
  • the metal of the antenna 20 is usually coated with a layer of green oil, and the fuel injection process can be realized by using a common existing process. Antenna 20 is protected by metal. Prevent oxidation of metals and external disturbances.
  • the fuel injection thickness is from 115 ⁇ m to 156 ⁇ m. It can be understood that the thickness of the fuel injection can be selected as desired, and in some embodiments, the optimum design of the antenna 20 is achieved by adjusting the thickness of the fuel injection.
  • the earphone housing includes a first housing 11 and a second housing 12, the second housing 12 is provided with an in-ear end 121, and the Bluetooth antenna 20 is disposed on the first housing 11.
  • the in-ear end 121 is disposed on the second housing 12, and the softening silicone can be provided on the in-ear end 121 or the entire second housing 12 to improve the earphone. Use comfort to enhance the user experience.
  • the portion of the first housing 11 that is outwardly of the earphone can be separately designed, and the antenna 20 is designed on the first housing 11, so that the radiation of the antenna 20 can be ensured without affecting the comfort of use.
  • the Bluetooth antenna 20 is disposed at a lower portion of the first housing 11. It can be understood that the earphone is more or less blocked by the human body during use. For example, when the earphone is inserted into the ear, the outer surface of the earphone is close to the ear. Even the first casing 11 of the earphone facing outward is affected. In order to ensure the radiation effect of the earphone antenna 20, it is judged from the original drawing of the ergonomic wear that the lower side is superior to the radiation performance of the antenna. That is, the lower portion of the first housing 11 of the antenna 20 is thus less affected by the occlusion of the ear, which is optimal for use of the antenna 20.
  • the outer surface of the first casing 11 is a first-order appearance surface. It can be understood that the surface of the product is divided into first, second and third appearances according to whether the product is exposed after the assembly is completed.
  • the first appearance surface refers to the surface which is easy to see during normal use of the product, and requires the best. Appearance Quality. Secondary appearance surface: a surface that is not visible during normal use, but requires excellent appearance quality.
  • the three-level appearance surface the inner surface that the user cannot see, does not require an excellent appearance quality.
  • the first housing 11 of the Bluetooth earphone of the present invention is exposed, and can be directly seen during use. Therefore, it is usually designed as a first-level appearance surface, and the design of the first-level appearance surface can ensure the superior performance of the antenna 20 of the surface design.
  • the feed point includes an electric feed point 22 and a ground feed point 23, both of which are connected to the metal radiating arm 21.
  • the antenna 20 is designed to design an electrical feed point 22 for connecting the circuit signal input and a ground feed point 23 for connecting to the circuit and for debugging the antenna 20 as needed. It can be understood that the design can be performed as needed. And designing the locations of the electrical feed points 22 and the ground feed points 23. Its connection to the radiating arm 21 follows the design principle of the antenna 20.
  • the antenna 20 can be designed using the PIFA antenna 20 design principle.
  • the electric feed point 22 and the ground feed point 23 are respectively connected to the metal radiating arm 21 through blind holes of laser engraving. It can be understood that the connection between the electric feed point 22 and the ground feed point 23 and the radiation arm 21 is designed by using the blind hole design in the circuit.
  • the influence of the human head on the antenna 20 during use is effectively avoided.
  • the product is designed on the outermost surface, and the distance from the human head is 8MM, which effectively reduces the influence of the human head on the antenna 20 (the influence of FS and BHR/L is small), and improves the efficiency of the antenna 20 at 2400-2500MHz.
  • the directivity of the antenna 20 is 8MM, which effectively reduces the influence of the human head on the antenna 20 (the influence of FS and BHR/L is small), and improves the efficiency of the antenna 20 at 2400-2500MHz.
  • the efficiency of the passive antenna 20 through the LDS design is above 35%.
  • the following table shows the antenna performance index test data for each frequency point. It can be seen that the average efficiency of the antenna is 38%, and the efficiency is about twice as high as the traditional design.
  • the performance of the antenna can also be seen from the standing wave S parameter map of the antenna 20 of FIG.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

本实用新型涉及一种蓝牙耳机包括耳机壳体和蓝牙天线；耳机壳体为塑料件；蓝牙天线包括设置在耳机壳体表面的金属辐射臂，以及设置在耳机壳体内表面并与金属辐射臂导通连接的金属馈点。实施本实用新型的一种蓝牙耳机，通过将天线的金属辐射臂走线设计在耳机的表面上，可以在减小耳机体积的同时提高天线的收发效率，提升用户的体验。

Description

一种蓝牙耳机 技术领域
本实用新型涉及耳机，更具体地说，涉及一种蓝牙耳机。
 背景技术
随着蓝牙耳机的发展，用户对蓝牙耳机的使用效果要求也超来超高。目前传统的蓝牙天线设计是要产品内放置一根导线或在内部贴FPC（柔性电路板），通过调整导线（FPC线路）的长短来调整蓝牙天线的谐振。但是由于蓝牙耳机产品小，周边的器件多，导线受元器件的干扰与耦合，不利于产品天线的辐射，天线的效率低。
 技术问题
本实用新型要解决的技术问题在于，针对现有技术的上述缺陷，提供一种蓝牙耳机。
 技术解决方案
本实用新型解决其技术问题所采用的技术方案是：构造一种蓝牙耳机，包括耳机壳体和蓝牙天线；所述耳机壳体为塑料件；所述蓝牙天线包括设置在所述耳机壳体表面的金属辐射臂，以及设置在所述耳机壳体内表面并与所述金属辐射臂导通连接的金属馈点。
优选地，所述蓝牙天线包括设置在所述耳机壳体外表面。
优选地，所述蓝牙天线包括激光直接天线。
优选地，所述金属辐射臂表面设有喷油。
优选地，所述喷油厚度为115μm-156μm。
优选地，所述耳机壳体包括第一壳体和第二壳体，所述第二壳体设有入耳端，所述蓝牙天线设置在所述第一壳体上。
优选地，所述蓝牙天线设置在所述第一壳体下部。
优选地，所述第一壳体外表面为一级外观面。
优选地，所述馈点包括电馈点和地馈点，均与所述金属辐射臂连接。
优选地，所述电馈点和地馈点分别通过镭雕化镀的盲孔连接所述金属辐射臂。
 有益效果
实施本实用新型的一种蓝牙耳机，具有以下有益效果：通过将天线的金属辐射臂走线设计在耳机的表面上，可以在减小耳机体积的同时提高天线的收发效率，提升用户的体验。
 附图说明
下面将结合附图及实施例对本实用新型作进一步说明，附图中：
图1是本实用新型蓝牙耳机一实施例的结构示意图；
图2是图1的第一局部结构示意图；
图3是图1的第二局部结构示意图；
图4为一实施例天线驻波测试结果图。
 本发明的实施方式
为了对本实用新型的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本实用新型的具体实施方式。
如图1，图2和图3所示，在本实用新型的蓝牙耳机一实施例中，蓝牙耳机包括耳机壳体和蓝牙天线20；耳机壳体为塑料件；蓝牙天线20包括设置在耳机壳体表面的金属辐射臂21，以及设置在耳机壳体内表面并与金属辐射臂21导通连接的金属馈点22、23。
可以理解，现有技术蓝牙耳机通常塑料材质制成的外部壳体和壳体内部的空间，壳体的形状依据耳朵声道入口的形状设计，壳体内部空间用来放置耳机电路单元。为了方便，可以将天线20设计在耳机本体上，然后在耳机本体上设有连接点连接至耳机内部的电路单元，可以节约天线20放置空间。具体的，将天线的金属辐射臂21设置在塑料壳体的表面，这里的表面可以包括塑料壳体的内表面和外表面，以保证天线20的辐射性能，将天线20用于与耳机电路单元连接的金属馈点22、23设置在塑料壳体的内表面，方便天线20与耳机电路单元的连接，也可以保证耳机的美观。可以理解，金属馈点22、23与辐射臂21穿过壳体内部，导通连接。还可以理解，当天线20设置塑料壳体的的内表面时，金属馈点22、23与辐射臂21可以在内表面直接导通连接。
进一步的，蓝牙天线包括设置在耳机壳体外表面。具体的，可以将天线的金属辐射臂21设置在塑料壳体的外表面以进一步的提高天线20的辐射性能。
进一步的，蓝牙天线20包括激光成型天线。例如常用的LDS天线，通过激光成型的设计方式和通过镭雕-化镀工艺，将天线20设计在壳体的表面，可以实现天线20于壳体的一体化，方便天线20的走线，不影响天线20的辐射，节省空间。当然LDS天线方案只是外表面天线工艺的优选方案，一些实施例中也可以采用其它类似的表面天线设计方案。
进一步的，金属辐射臂21表面设有喷油。可以理解，设置在壳体表面的天线20辐射臂21为金属材质，为了保护天线20表面，通常在天线20的金属表明涂有一层绿油，喷油工艺采用常用的现有工艺即可实现对天线20金属材质的保护。防止金属的氧化，以及外界的干扰。
进一步的，喷油厚度为115μm-156μm。可以理解为喷油厚度可以根据需要自行选择，在一些实施例中，通过调试喷油的厚度实现天线20的最佳的设计。
进一步的，在一些实施例中，耳机壳体包括第一壳体11和第二壳体12，第二壳体12设有入耳端121，蓝牙天线20设置在第一壳体11上。可以理解，整个耳机通过两个相互配合的壳体组装而成，入耳端121设在第二壳体12上，在入耳端121上或者整个第二壳体12可以设有软硅胶，提高耳机的使用舒服度，提升用户体验。而在耳机向外的那一部分即第一壳体11，则可以单独设计，将天线20设计在该第一壳体11上，可以在不影响使用舒服度的情况下保证天线20的辐射。
进一步的，蓝牙天线20设置在第一壳体11下部。可以理解，耳机在使用中，多多少少的会受到人体的遮挡，例如当耳机塞入耳朵使用时，耳机的外表面会与耳朵距离很近。即使是耳机的朝向外侧的第一壳体11，也会受到影响。为了保证耳机天线20的辐射效果，从人体工程学穿戴的原画来判断，下方更优于天线的辐射性能。即将天线20的第一壳体11的下部，这样受到耳朵遮挡的影响会减小，达到天线20使用的最优。
进一步的，第一壳体11外表面为一级外观面。可以理解，根据产品组装完成后是否外露将产品的面分为一级、二级和三级外观面，其中一级外观面指的是产品正常使用中易于看到的表面，要求有最佳的外观质量。二级外观面：正常使用中看不到的表面，但要求有优良的外观质量。三级外观面：用户看不到的内表面，不要求有优良的外观质量。本实用新型的蓝牙耳机的第一壳体11为裸露在外，使用中可直接看到。所以通常设计为一级外观面，同时一级外观面的设计，能够保证其表面设计的天线20的更优性能。
进一步的，馈点包括电馈点22和地馈点23，均与金属辐射臂21连接。具体的，天线20设计可以根据需要设计连接电路信号输入的电馈点22和用于与电路地连接，并用来对天线20进行调试的地馈点23，可以理解，这里可以根据需要进行设计，以及设计电馈点22和地馈点23的位置。其与辐射臂21的连接遵循天线20设计原理。例如可以采用PIFA天线20设计原理对天线20进行设计。
进一步的，电馈点22和地馈点23分别通过镭雕化镀的盲孔连接金属辐射臂21。可以理解，这里采用电路中盲孔设计方式，设计连接电馈点22和地馈点23与辐射臂21的连接。
通过过此设计,有效地归避了在使用过程中(产品带入人耳)人头对天线20的影响。产品是设计在最外表面，距离人头的距离有8MM的距离，有效地减小了人头对天线20的影响（FS及BHR/L影响小），提升产品在2400-2500MHz的天线20效率，提升天线20的方向性。
具体的，通过以LDS天线设计为例，以下为通过LDS设计方案的无源天线20效率。在2400-2500MHz频段上，天线20的整体效率都在35%以上。下表为各个频点的天线性能指标测试数据，可以看出，天线的效率平均值为38%，效率比传统设计方案高出一倍左右。
频率(MHz) 效率(%) 效率(dB) 天线增益(dBd)
2400 37.7 -4.24 -0.87
2410 37.52 -4.26 -0.52
2420 37.83 -4.22 -1.1
2430 38.02 -4.2 -1.04
2440 39.32 -4.05 -0.27
2450 40.26 -3.95 0.13
2460 38.35 -4.16 -0.09
2470 35.69 -4.47 -0.08
2480 35.88 -4.45 0.21
2490 39.23 -4.06 0.35
2500 40.9 -3.88 0.2
此外，也可以从图4天线20的驻波S参数图看出天线的性能的提升。
可以理解的，以上实施例仅表达了本实用新型的优选实施方式，其描述较为具体和详细，但并不能因此而理解为对本实用新型专利范围的限制；应当指出的是，对于本领域的普通技术人员来说，在不脱离本实用新型构思的前提下，可以对上述技术特点进行自由组合，还可以做出若干变形和改进，这些都属于本实用新型的保护范围；因此，凡跟本实用新型权利要求范围所做的等同变换与修饰，均应属于本实用新型权利要求的涵盖范围。

Claims (10)

  1. 一种蓝牙耳机，包括耳机壳体和蓝牙天线；其特征在于，
    所述耳机壳体为塑料件；所述蓝牙天线包括设置在所述耳机壳体表面的金属辐射臂，以及设置在所述耳机壳体内表面并与所述金属辐射臂导通连接的金属馈点。
  2. 根据权利要求1所述的蓝牙耳机，其特征在于，所述蓝牙天线包括设置在所述耳机壳体外表面。
  3. 根据权利要求1或2所述的蓝牙耳机，其特征在于，所述蓝牙天线包括激光成型天线。
  4. 根据权利要求1或2 所述的蓝牙耳机，所述金属辐射臂表面设有喷油。
  5. 根据权利要求4所述的蓝牙耳机，其特征在于，所述喷油厚度为115μm-156μm。
  6. 根据权利要求1或2 所述的蓝牙耳机，其特征在于，所述耳机壳体包括第一壳体和第二壳体，所述第二壳体设有入耳端，所述蓝牙天线设置在所述第一壳体上。
  7. 根据权利要求6所述的蓝牙耳机，其特征在于，所述蓝牙天线设置在所述第一壳体下部。
  8. 根据权利要求6所述的蓝牙耳机，其特征在于，所述第一壳体外表面为一级外观面。
  9. 根据权利要求1或2 所述的蓝牙耳机，其特征在于，所述金属馈点包括电馈点和地馈点，均与所述金属辐射臂连接。
  10. 根据权利要求9所述的蓝牙耳机，其特征在于，所述电馈点和地馈点分别通过镭雕化镀的盲孔连接所述金属辐射臂。
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