技术领域technical field
本实用新型涉及一种麦克风，具体涉及一种无垫圈驻极体电容式麦克风。The utility model relates to a microphone, in particular to a gasket-free electret condenser microphone.
背景技术Background technique
目前市场上语音类电子产品上所使用的驻极体麦克风，对于信噪比的要求越来越高，目前虽然有越来越多的高信噪比FET管芯，但也有一定的极限，所以在同等使用高信噪比的FET管芯条件下，通过更改麦克风内部结构设计，通过提高麦克风的灵敏度，来追求更高的信噪比。At present, the electret microphones used in voice electronic products in the market have higher and higher requirements for signal-to-noise ratio. Although there are more and more high-signal-to-noise ratio FET dies, they also have certain limits, so Under the condition of using the same FET core with high signal-to-noise ratio, by changing the internal structure design of the microphone and improving the sensitivity of the microphone, a higher signal-to-noise ratio is pursued.
实用新型内容Utility model content
本实用新型的目的在于克服现有技术存在的问题，提供一种无垫圈驻极体电容式麦克风。The purpose of the utility model is to overcome the problems existing in the prior art and provide a gasket-free electret condenser microphone.
为实现上述技术目的，达到上述技术效果，本实用新型通过以下技术方案实现：In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the utility model is realized through the following technical solutions:
一种无垫圈驻极体电容式麦克风，包括外壳收音孔，振动膜片，背极板，铜环，后腔体和PCB线路板，所述外壳收音孔设在外壳底部的中间位置，所述振动膜片的两端分别设在所述外壳底部的两个角的位置上，所述振动膜片上方设有所述背极板，所述背极板与所述铜环的一端连接，所述铜环的另一端与所述PCB线路板连接。A gasket-free electret condenser microphone, comprising a casing sound hole, a vibrating diaphragm, a back plate, a copper ring, a rear cavity and a PCB circuit board, the casing sound hole is arranged in the middle of the bottom of the casing, and the The two ends of the vibrating diaphragm are respectively arranged at the two corners of the bottom of the casing, the back plate is arranged above the vibrating diaphragm, and the back plate is connected to one end of the copper ring, so that The other end of the copper ring is connected with the PCB circuit board.
进一步的，所述背极板是圆弧形的。Further, the back plate is arc-shaped.
进一步的，所述铜环有两个，且所述铜环之间形成了后腔体。Further, there are two copper rings, and a rear cavity is formed between the copper rings.
本实用新型的有益效果:The beneficial effects of the utility model:
本实用新型技术方案可应用于语音通讯设备上,因为振动膜片在振动时候的形变的弧形形状和背极板的弧形形状相似，在振动的时候振动膜片和背极板的等距离性很明显，这样会将依靠距离产生电位差的效率提高，在同等条件下，通过提高麦克风灵敏度而进一步提高其信噪比来达到超高信噪比麦克风。The technical scheme of the utility model can be applied to voice communication equipment, because the arc shape of the deformation of the vibrating diaphragm is similar to the arc shape of the back plate when vibrating, and the equidistant distance between the vibrating diaphragm and the back plate when vibrating Obviously, this will improve the efficiency of generating potential difference depending on the distance. Under the same conditions, the signal-to-noise ratio can be further improved by improving the microphone sensitivity to achieve an ultra-high signal-to-noise ratio microphone.
附图说明Description of drawings
图1是目前常用的驻极体电容式麦克风结构示意图；Fig. 1 is the structure schematic diagram of electret condenser microphone commonly used at present;
图2是本实用新型驻极体电容式麦克风结构示意图。Fig. 2 is a structural schematic diagram of the electret condenser microphone of the present invention.
图中标号说明：11、现有PCB线路板，12、现有后腔体，13、现有垫圈，14、现有外壳收音孔，15、现有振动膜片，16、现有铜环，17、现有背极板，1、外壳收音孔，2、振动膜片，3、背极板，4、铜环，5、后腔体，6、PCB线路板。Explanation of symbols in the figure: 11. Existing PCB circuit board, 12. Existing rear cavity, 13. Existing washer, 14. Existing shell sound receiving hole, 15. Existing vibrating diaphragm, 16. Existing copper ring, 17. Existing back plate, 1. Shell acoustic hole, 2. Vibrating diaphragm, 3. Back plate, 4. Copper ring, 5. Rear cavity, 6. PCB circuit board.
具体实施方式Detailed ways
下面将参考附图并结合实施例，来详细说明本实用新型。The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
参照图2所示，一种无垫圈驻极体电容式麦克风，包括外壳收音孔1，振动膜片2，背极板3，铜环4和PCB线路板6，所述外壳收音孔1设在外壳底部的中间位置，所述振动膜片2的两端分别设在所述外壳底部的两个角的位置上，所述振动膜片2上方设有所述背极板3，所述背极板3与所述铜环4的一端连接，所述铜环4的另一端与所述PCB线路板6连接。With reference to shown in Figure 2, a kind of gasket-free electret condenser microphone, comprises housing sound receiving hole 1, vibrating diaphragm 2, back pole plate 3, copper ring 4 and PCB circuit board 6, and described housing sound receiving hole 1 is located at In the middle position of the bottom of the housing, the two ends of the vibrating diaphragm 2 are respectively arranged at two corners of the bottom of the housing, the back plate 3 is arranged above the vibrating diaphragm 2, and the back pole The board 3 is connected to one end of the copper ring 4 , and the other end of the copper ring 4 is connected to the PCB circuit board 6 .
进一步的，所述背极板3是圆弧形的。Further, the back plate 3 is arc-shaped.
进一步的，所述铜环4有两个，且所述铜环4之间形成了后腔体5。Further, there are two copper rings 4 , and a rear cavity 5 is formed between the copper rings 4 .
本实用新型的原理：Principle of the utility model:
无垫圈驻极体麦克风，主要是利用弯曲的弧形背极板3与圆形振膜在整体上拉出距离差，即使去掉垫圈，振动膜片2上下振动时候仍然可以不碰到背极板3。The washer-free electret microphone mainly uses the difference in distance between the curved back plate 3 and the circular diaphragm as a whole. Even if the gasket is removed, the vibrating diaphragm 2 can still not touch the back plate when it vibrates up and down. 3.
如图2所示，本实用新型的无垫圈驻极体电容式麦克风，声音信号通过麦克风外壳收音孔1进入，使得振动膜片2振动；虽然没有垫圈阻隔，但是由于背极板3利用弯曲的弧形结构，使得振动膜片2不会碰到背极板3，仍然可以形成一个通过正负极距离发生变化而等效的可变电容将声音信号通过声腔5和铜环4传输到PCB线路板6而转化为模拟电信号输出。As shown in Figure 2, in the electret condenser microphone without gasket of the present invention, the sound signal enters through the sound receiving hole 1 of the microphone shell, so that the vibrating diaphragm 2 vibrates; The arc-shaped structure prevents the vibrating diaphragm 2 from touching the back plate 3, and can still form a variable capacitor equivalent to the change in the distance between the positive and negative poles to transmit the sound signal to the PCB line through the acoustic cavity 5 and the copper ring 4 Board 6 and converted into analog electrical signal output.
以上所述仅为本实用新型的优选实施例而已，并不用于限制本实用新型，对于本领域的技术人员来说，本实用新型可以有各种更改和变化。凡在本实用新型的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本实用新型的保护范围之内。The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520325313.4UCN204721605U (en) | 2015-05-20 | 2015-05-20 | A kind of without packing ring electret capacitor microphone |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520325313.4UCN204721605U (en) | 2015-05-20 | 2015-05-20 | A kind of without packing ring electret capacitor microphone |
| Publication Number | Publication Date |
|---|---|
| CN204721605Utrue CN204721605U (en) | 2015-10-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520325313.4UExpired - LifetimeCN204721605U (en) | 2015-05-20 | 2015-05-20 | A kind of without packing ring electret capacitor microphone |
| Country | Link |
|---|---|
| CN (1) | CN204721605U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106016141A (en)* | 2016-06-30 | 2016-10-12 | 尚艳燕 | Decorative lamp |
| CN111757227A (en)* | 2020-07-06 | 2020-10-09 | 瑞声科技（南京）有限公司 | MEMS microphone |
| WO2023272496A1 (en)* | 2021-06-29 | 2023-01-05 | 九声(唐山)科技有限公司 | Rear pole plate for recording microphone and recording microphone |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016141A (en)* | 2016-06-30 | 2016-10-12 | 尚艳燕 | Decorative lamp |
| CN111757227A (en)* | 2020-07-06 | 2020-10-09 | 瑞声科技（南京）有限公司 | MEMS microphone |
| WO2023272496A1 (en)* | 2021-06-29 | 2023-01-05 | 九声(唐山)科技有限公司 | Rear pole plate for recording microphone and recording microphone |
| US11877137B2 (en) | 2021-06-29 | 2024-01-16 | Jiusheng (Tangshan) Technology Co., Ltd. | Backplate for recording microphone, and recording microphone |
| DE112021000019B4 (en)* | 2021-06-29 | 2025-08-28 | Jiusheng (Tangshan) Technology Co., Ltd. | Recording microphone |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term | Granted publication date:20151021 |