CN209017315U - A kind of electret microphone - Google Patents
A kind of electret microphone Download PDFInfo
- Publication number
- CN209017315U CN209017315U CN201821947881.8U CN201821947881U CN209017315U CN 209017315 U CN209017315 U CN 209017315U CN 201821947881 U CN201821947881 U CN 201821947881U CN 209017315 U CN209017315 U CN 209017315U
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- microphone
- back cavity
- metal enclosed
- chamber
- enclosed ring
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Abstract
The utility model provides a kind of electret microphone, includes shell, ante-chamber and back cavity, vibrating diaphragm is equipped between ante-chamber and back cavity, and the back cavity connects metal enclosed ring, and the metal enclosed ring has groove, the groove is enclosed set after form a closing chamber.Electret microphone in the utility model, since back cavity is connected with metal enclosed ring and metal enclosed ring is formed with closing chamber, so that adjusting the height of metal enclosed ring or the spatial volume of the i.e. changeable back cavity of thickness, to reduce the peak value of the medium-high frequency section of microphone, improve the frequency band of high frequency, and other electroacoustic properties are not influenced, meet the wideband acoustic performance of microphone.
Description
Technical field
The utility model relates to microphone techniques field more particularly to a kind of electret microphones.
Background technique
Electret microphone is one kind of microphone, is widely applied because of advantage small in size, frequency is wide, at low cost
In: the fields such as telephone set, intercom, voice-operated device, mobile phone, headset, monitoring device, hearing aid, MP3, MP4, digital camera.So
And the upper electret microphone sold is all made of forward and backward cavity body structure on the market, so that the frequency response curve of electret microphone exists
Medium-high frequency section peak value is higher, is unable to satisfy user demand.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiencies of the prior art, provide a kind of electret mike
Wind solves the problems, such as that microphone medium-high frequency section peak value is higher.
Technical problem to be solved in the utility model is achieved by the following technical solution:
A kind of electret microphone includes shell, ante-chamber and back cavity, vibrating diaphragm, the back cavity is equipped between ante-chamber and back cavity
Connect metal enclosed ring, the metal enclosed ring has groove, the groove is enclosed set after form a closing chamber.
Particularly, the volume of the closing chamber is greater than the volume of the back cavity.
Particularly, the volume of the back cavity is greater than the volume of the ante-chamber.
Particularly, the shell has a first end and a second end, and the first end is equipped with circuit board, and the second end is set
There is tone-entering hole.
Particularly, the metal enclosed ring and the circuit board enclose jointly sets the closing chamber.
Particularly, the shell side wall of the side wall of the metal enclosed ring and the shell has gap.
Particularly, the gap filling has plastic chamber.
Particularly, back pole plate is equipped between the vibrating diaphragm and the metal enclosed ring, the back pole plate is equipped with one or more
A through-hole, the through-hole are connected to the back cavity, and copper ring is equipped between the metal enclosed ring and the back pole plate.
Particularly, air gap gasket is filled between the back pole plate and the vibrating diaphragm.
Particularly, the outer side covering of the tone-entering hole has Air Filter.
Electret microphone in the utility model, since back cavity is connected with metal enclosed ring and metal enclosed ring is formed with
Closing chamber, so that the height of metal enclosed ring or the spatial volume of the i.e. changeable back cavity of thickness are adjusted, to reduce microphone
The peak value of medium-high frequency section improves the frequency band of high frequency, and does not influence other electroacoustic properties, meets the wideband acoustic performance of microphone.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of the electret microphone of embodiment in the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Detailed description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, the electret microphone in electret microphone the present embodiment in the present embodiment include shell 1,
Circuit board 2 and vibrating diaphragm 3.Wherein, shell 1 has first end 11, second end 12 and shell side wall 13；Circuit board 2 is mounted on shell
At 1 first end 11, and tone-entering hole 121 is offered in second end 12, the lateral surface of circuit board 2 is equipped with one or more welderings
Disk 22 is equipped with field effect transistor (Field Effect Transistor, abbreviation FET) 24 on the medial surface of circuit board 2.
It should be noted that the one side of circuit board 2 towards second end 12 is medial surface, another side is then lateral surface.In order to prevent into ash,
The outer side covering of the tone-entering hole 121 has Air Filter 10.Vibrating diaphragm 3 is installed in shell 1, is equipped between vibrating diaphragm 3 and second end 12
Ante-chamber 71 is equipped with back cavity 72 between vibrating diaphragm 3 and circuit board 2.
Wherein, back cavity 72 connects metal enclosed ring 4, and metal enclosed ring 4 has groove, groove is enclosed set after form an envelope
Closed chamber 73.As shown, the ante-chamber 71, back cavity 72 and closing chamber 73 are arranged successively, by adjusting the big of metal enclosed ring
Small, the size that can correspond to adjustment closing chamber 73 obtains different audio frequency curves to change the volume of back cavity.For example, closing
The volume of chamber 73 is greater than the volume of the back cavity 72；And/or the volume of the back cavity 72 is greater than the volume of the ante-chamber 71.This
Embodiment is not limited, manufacturer can according to the height of the metal enclosed ring of actual demand flexibly adjustment of product or thickness etc.,
To the corresponding volume for reducing back cavity, to meet different audio frequency requirements.
According to one embodiment of the application, the metal enclosed ring 4 is completely closed to form the closing chamber 73 in itself；Or
Person, the metal enclosed ring 4 and the circuit board 2 enclose jointly and set the closing chamber 73.Metal enclosed ring 4 can be according to practical need
It asks and selects various metal materials.
Specifically, the shell side wall 13 of the side wall 41 of metal enclosed ring 4 and the shell 1 has gap.Optionally, the gap
Various cavitys need to be packed into, to form the acoustic performance of excellent benefit.For example, the gap filling has plastic chamber 5, such as plastic tube；Example again
Such as, which has the wooden cavity or foam cavity etc..
According to one embodiment of the application, back pole plate 6 is equipped between the vibrating diaphragm 3 and the metal enclosed ring 4, it is described
Back pole plate 6 is equipped with one or more through-holes 61, and the through-hole 61 is connected to the back cavity 72；The metal enclosed ring 4 and the back
It is equipped with copper ring 8 between pole plate 6, and circuit board 2, metal enclosed ring 4 and copper ring 8 can be directly electrically connected, is more advantageous to and promotes Mike
The acoustical behavior of wind；In addition, being filled with air gap gasket 9 between the back pole plate 6 and the vibrating diaphragm 3.
Electret microphone in the utility model, since back cavity is connected with metal enclosed ring and metal enclosed ring is formed with
Closing chamber, so that the height of metal enclosed ring or the spatial volume of the i.e. changeable back cavity of thickness are adjusted, to reduce microphone
The peak value of medium-high frequency section improves the frequency band of high frequency, and does not influence other electroacoustic properties, meets the wideband acoustic performance of microphone.
It should be noted that, in this document, the terms such as term " installation ", " connected ", " connection ", " fixation " should all do broad sense
Understand, for example, " connection " may be fixed connection or may be dismantle connection, or integral connection；" connected " can be directly
Connect it is connected, can also be indirectly connected through an intermediary.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the description of the utility model, it is to be understood that the orientation or positional relationship of the instructions such as term " on ", "lower" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or unit must have specific direction, be constructed and operated in a specific orientation, it is thus impossible to understand
For limitations of the present invention.
Relational terms such as first and second and the like are used merely to an entity or operation and another entity
Or operation distinguishes, without necessarily requiring or implying between these entities or operation there are any this actual relationship or
Person's sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to non-exclusionism include, to make
Obtaining the process, method, article or equipment including a series of elements not only includes those elements, but also including not arranging clearly
Other element out, or further include for elements inherent to such a process, method, article, or device.Not more
In the case where limitation, the element that is limited by sentence "including a ...", it is not excluded that including process, the side of the element
There is also other identical elements in method, article or equipment.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail.It should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of electret microphone includes shell, ante-chamber and back cavity, vibrating diaphragm is equipped between ante-chamber and back cavity, which is characterized in that
The back cavity connects metal enclosed ring, and the metal enclosed ring has groove, the groove is enclosed set after form a closing chamber.
2. microphone as described in claim 1, which is characterized in that the volume of the closing chamber is greater than the volume of the back cavity.
3. microphone as claimed in claim 2, which is characterized in that the volume of the back cavity is greater than the volume of the ante-chamber.
4. microphone as described in claim 1, which is characterized in that the shell has a first end and a second end, and described first
End is equipped with circuit board, and the second end is equipped with tone-entering hole.
5. microphone as claimed in claim 4, which is characterized in that the metal enclosed ring and the circuit board enclose jointly and set institute
State closing chamber.
6. microphone as described in claim 1, which is characterized in that the side wall of the metal enclosed ring and the shell-side of the shell
Wall has gap.
7. microphone as claimed in claim 6, which is characterized in that the gap filling has plastic chamber.
8. microphone as described in claim 1, which is characterized in that be equipped with backplane between the vibrating diaphragm and the metal enclosed ring
Plate, the back pole plate are equipped with one or more through-holes, and the through-hole is connected to the back cavity, and the metal enclosed ring and the back
Copper ring is equipped between pole plate.
9. microphone as claimed in claim 8, which is characterized in that be filled with air gap pad between the back pole plate and the vibrating diaphragm
Piece.
10. microphone as claimed in claim 4, which is characterized in that the outer side covering of the tone-entering hole has Air Filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821947881.8U CN209017315U (en) | 2018-11-23 | 2018-11-23 | A kind of electret microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821947881.8U CN209017315U (en) | 2018-11-23 | 2018-11-23 | A kind of electret microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209017315U true CN209017315U (en) | 2019-06-21 |
Family
ID=66842973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821947881.8U Active CN209017315U (en) | 2018-11-23 | 2018-11-23 | A kind of electret microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209017315U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611851A (en) * | 2019-10-25 | 2019-12-24 | 歌尔科技有限公司 | Single-directional microphone |
| CN112714377A (en) * | 2019-10-24 | 2021-04-27 | 比亚迪股份有限公司 | Sound processing device and electronic equipment |
-
2018
- 2018-11-23 CN CN201821947881.8U patent/CN209017315U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112714377A (en) * | 2019-10-24 | 2021-04-27 | 比亚迪股份有限公司 | Sound processing device and electronic equipment |
| CN110611851A (en) * | 2019-10-25 | 2019-12-24 | 歌尔科技有限公司 | Single-directional microphone |
| CN110611851B (en) * | 2019-10-25 | 2021-06-01 | 歌尔科技有限公司 | Single-directional microphone |
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