CN85101800A - The telephone bandset microphone assembly - Google Patents
The telephone bandset microphone assembly Download PDFInfo
- Publication number
- CN85101800A CN85101800A CN85101800.9A CN85101800A CN85101800A CN 85101800 A CN85101800 A CN 85101800A CN 85101800 A CN85101800 A CN 85101800A CN 85101800 A CN85101800 A CN 85101800A
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- China
- Prior art keywords
- microphone
- cavity
- chamber
- assembly
- flange
- Prior art date
- Legal status (The legal status 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 status listed.)
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- Telephone Set Structure (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
The telephone transmitter assembly of one improvement frequency response curve uses commercial boxlike electret microphone.The improvement frequency response curve is to be realized by a microphone seat that has the microphone of first cavity, and cavity is limited to microphone one end and fixedly between the cavity end of microphone, the cavity end has the end wall of belt and hole, and this hole is covered by one deck sound-resistance material.The end wall another side forms second cavity by the hollow structure on the handset transmitter cover wall.One slit is arranged on the transmitter cover wall in component range.First cavity makes hole and sound-resistance material under specific one kilo hertz 14 decibels restriction be arranged as damping, and the sympathetic response under three kilo hertzs of second cavity and slit.
Description
The invention relates to the microphone assembly that a kind of telephone bandset is used, be meant a kind of assembly that uses box type microphone especially, just a kind of microphone assembly that is suitable for the electret microphone of the nonspecific type of use that phone uses.
The commodity box type electret microphone that is used in recorder and similar devices is dog-cheap, and the flat frequency response curve is arranged.For the electret microphone of telephone set production is not general box type microphone, they have desirable frequency response curve, but relatively more expensive.
Commodity box type microphone used in the present invention, this microphone are contained in the telephone bandset together with custom-designed microphone seat just can improve its frequency response curve, is popular in the application of telephone set like this.
Put it briefly, comprise a box type microphone and a microphone seat according to microphone assembly provided by the invention, this microphone seat is a hollow molded, microphone can snap in its overcoat cavity, and the front surface of microphone box can be fixed by the protuberance branch in one week of extension in the cavity.The cavity of this microphone seat has the end of a sealing, an aperture is arranged on it, and a predetermined distance is arranged between the end of the front surface of box type microphone and sealing.The aperture loam cake has sound-resistance material, and the size in hole and sound-resistance material have determined the acoustic resistance of this assembly.The microphone seat is placed on the ledge that is positioned at handset transmitter cover the inside, and this has just constituted a preceding cavity, and its cooperates before transmitter cover slit on the face, given needed resonance frequency.
The present invention can be by following embodiment, and description taken together with the accompanying drawings is understood by way of example.Wherein:
Fig. 1 is the sectional view of box type microphone and the combination of microphone seat.
Fig. 2 is the exploded view that has the mobile phone of a box type microphone and a receiver.
Fig. 3 is along the cutaway view that III on Fig. 2-the IV line is cut open, has shown the microphone assembly of mobile phone.
Fig. 4 is the front view of transmitter cover.
Fig. 5 is the inner surface view that omits the transmitter cover of microphone assembly.
Fig. 6 is the needed performance curve of telephone transmitter, and the general curve that obtains of box type microphone.
As shown in Figure 1, a box type microphone of representing with (10) is assemblied in the microphone seat (11) of hollow, and the microphone seat comprises a pipe box part (12) that has forward flange dish (13), and this ring flange is stretched in an end of pipe box.An aperture (14) is arranged on the ring flange (13), and there is a cyclic rib (15) front of ring flange (13), is used for constituting a shallow dimple (16).A slice sound-resistance material (17) is fixed on the front of cyclic rib (15) scope inner flange with welding or method of attachment.Pipe box has three grooves of opening from microphone (18) behind.The pipe box wall outwards opens a bit, and box type microphone is inserted pipe box by rib (19), and then, rib (19) fastens box from the back of box type microphone.The preceding peripheral cover (20) of box type microphone is held tightly by all strait flanges (21) in the pipe box, and this flange makes between the front of box type microphone and the ring flange (13) a predetermined distance.Joint (22) stretches out from the box type microphone back side, in order to connect telephone line.
Shown in Figure 2, be contained on the little circuit board (25) as box type microphone and the microphone seat of Fig. 1, a standard-sized mould post (26) is housed on this circuit board.This assembly is installed in the transmitter cover of telephone bandset, and this cover is represented with (27).The microphone seat is placed on the tubular structure (28), and this tubular structure is to stretch upwards from the positive inner face of cover (27).Circuit board (25) is placed on the pillar (29), and fixing with screw 30.A ring seal pad (31) is placed between microphone seat (11) and the tubular structure (28).Mould post (26) be positioned at the hole that cover (27) wall is used for adorning formpiston and be connected.
Fig. 2 has also represented the remainder of mobile phone, and comprising front part (35) and back member (36), front part has been located a receiver cover in (37), and receiver uses (39) to represent with (38) expression, sealing gasket.Be electrically connected with two leads (40) to circuit board (25) from receiver.
What Fig. 3 sectional view was seen is to comprise microphone (10), microphone seat (11), the microphone assembly of wiring board (25) and mould post (26).In the preceding face (41) of transmitter (27), an arcuation slit (42) is arranged, this slit is within tubular structure (28), and its rear portion is more being seen than broad such as Fig. 3.For cause attractive in appearance, on the front surface of preceding face (41), do a groove (43), make it and the narrower partial continuous of slit (42).But face (41) before this not break-through of groove.Groove (43) and slit (42) can be seen on Fig. 4, can only see slit (42) on Fig. 5.
As previously mentioned, the frequency response curve that box type microphone itself is dissatisfied does not meet the standard of phone yet, but utilizes this microphone arrangement can improve its frequency response.At first box type microphone is contained in the microphone seat, this has a specific cavity between the end of the front surface of box type microphone and microphone seat, and microphone seat end has an aperture that is covered with sound-resistance material (17).Cavity between box type microphone and acoustic resistance card provides needed damping.The acoustic resistance of sound-resistance material (17) is come selected like this, makes 1000Hz frequency drop-out value be restricted to 14dB, and the size of hole (14) is relevant with the acoustic resistance of material (17).Cavity between the front of the substrate of microphone seat and cover (27) and slit (42) synthesize sympathetic response under the 3000Hz frequency.Interface place between microphone seat (11) and tubular structure (28), with sealing gasket (31) with this with respect to preceding cavity after cavity seal.
Fig. 6 represents the frequency response curve that obtains with the present invention, and it improves to some extent for the transmitter of not improvement.Chain-dotted line (50) expression is the frequency response curve of the transmitter of improvement not, the resulting desirable or averaged curve of solid line (51) expression the present invention.The allowed band of the line (51) that dotted line (52) expression can be approved.
Errata
CPEL855054
Claims (6)
1, a kind of microphone assembly that is used for telephone bandset, it is characterized in that including in the microphone seat (11) electret microphone (10), said microphone seat has a pipe box (12) that limits post chamber, a garden, a flange (21) is distributed in around the inwall front portion in this post chamber, garden, and flange has a predetermined distance to the front end in chamber.Deformable device (19) stretches in the chamber in the rear end, and box type electret microphone (10) buckles in the chamber by deformable device (19), and fastening is between deformable device (19) and flange (21).Ring flange (13) covers the front end of the body of having one's bosom filled with, and defines first cavity with microphone.Ring flange (13) is passed in hole (14), and one deck sound-resistance material (17) covers on the hole.Device (27), (28), (41) define second cavity at the opposite side that ring flange (13) leaves first cavity.
2, according to the assembly of claim 1, the defined second cavity device is characterized in that the transmitter cover (27) of telephone bandset has a preceding face (41); The tubular structure (28) of the medial expansion of the past face (41); Microphone seat (11) is placed on the internal end surface of tubular structure (28).
3, according to the assembly of claim 1 or 2, the post chamber, garden that pipe box limited, (stretch 12 rear end, and have shallow rib (19) to stretch in the chamber in the rear end, and shallow rib (19) constitutes deformable device (19) and is stretched in this chamber at pipe box to it is characterized in that having a plurality of slits (18).
4,, it is characterized in that the upward break-through of the preceding face (41) of slit (42) in tubular structure (28) scope according to the assembly of claim 2.
5, according to the assembly of claim 4, it is characterized in that first cavity has the damping amount of a predetermined value, the acoustic resistance of sound-resistance material (17) makes under 1000Hz peak-limitation at 14dB.And second cavity makes it to empathize at 3000Hz with a predetermined value with slit (42).
6, according to the assembly of the arbitrary claim in front, it is characterized in that encircling rib (15) and extend with one heart from the front surface and the chamber of ring flange (13), sound-resistance material layer (17) is attached on the interior front surface of ring rib (15) scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85101800.9A CN1004464B (en) | 1985-04-01 | 1985-04-01 | Transmitter assembly for a telephone handset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85101800.9A CN1004464B (en) | 1985-04-01 | 1985-04-01 | Transmitter assembly for a telephone handset |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85101800A true CN85101800A (en) | 1987-02-04 |
| CN1004464B CN1004464B (en) | 1989-06-07 |
Family
ID=4792069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85101800.9A Expired CN1004464B (en) | 1985-04-01 | 1985-04-01 | Transmitter assembly for a telephone handset |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004464B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000005922A1 (en) * | 1998-07-22 | 2000-02-03 | Ziyi Cheng | An anti-noise-electret pick-up |
| WO2001063969A1 (en) * | 2000-02-03 | 2001-08-30 | Ziyi Cheng | An anti-noise pick-up |
-
1985
- 1985-04-01 CN CN85101800.9A patent/CN1004464B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000005922A1 (en) * | 1998-07-22 | 2000-02-03 | Ziyi Cheng | An anti-noise-electret pick-up |
| WO2001063969A1 (en) * | 2000-02-03 | 2001-08-30 | Ziyi Cheng | An anti-noise pick-up |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1004464B (en) | 1989-06-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |