CN2428937Y - Throat-sound controlled piezoelectric microphone for mobile telephone - Google Patents
Throat-sound controlled piezoelectric microphone for mobile telephone Download PDFInfo
- Publication number
- CN2428937Y CN2428937Y CN 00233250 CN00233250U CN2428937Y CN 2428937 Y CN2428937 Y CN 2428937Y CN 00233250 CN00233250 CN 00233250 CN 00233250 U CN00233250 U CN 00233250U CN 2428937 Y CN2428937 Y CN 2428937Y
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- lower cover
- piezoelectric
- piezoelectric element
- conduction sheet
- metallic conduction
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- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
The utility model relates to a throat-sound-control type piezoelectric microphone for a mobile telephone, which comprises an upper and a lower covers, a piezoelectric element, a sound signal amplifying circuit, and a signal feeding line, wherein, the piezoelectric element is adhered to a metallic conduction sheet; the perisporium of the open end of the lower cover is provided with an annular concave step, and the metallic conduction sheet can be placed in the concave step to match with the edge of the upper cover to perform positioning; a circuit board is arranged on the metallic conduction sheet; the sound signal amplifying circuit is arranged on the circuit board; the signal feeding line is electrically connected with the circuit board; the bottom of the piezoelectric element is partitioned with a vibrating wall at the bottom of the lower cover for a section of distance to form a pressure oscillation space; the exposed section of the signal feeding line is provided with a dust core body. The microphone can isolate background sounds, and has long service life.
Description
The utility model relates to a kind of microphone, particularly a kind of mobile phone cavum laryngis acoustic control formula piezoelectric microphone, the cavum laryngis acoustic control formula piezoelectric microphone that it is used for a kind of mobile telephone holding-free receiver.
Present skin contact piezoelectric microphone, as shown in Figure 1, has the upper and lower covers 10,11 that hollow matches, spring 13 of vertically-arranged on the diapire 12 of lower cover 11, the piezoelectric ceramic piece 15 of compeling ceraminator 14 bottoms is supported on the top of spring 13, and its metallic conduction sheet 16 is up leaned at the end of loam cake 10 periphery.The end face of metallic conduction sheet 16 is provided with a message and amplifies and impedance matching circuit plate 17, and microphone feed lines 18 is electrically connected with circuit board 17, ceraminator 14.During actual the use, the diapire 12 of lower cover 11 contact with human body cavum laryngis skin, the cavum laryngis vibration produces acoustical signal in then giving orders or instructions via skin, lower cover 11, spring 13 and ceraminator 14, further passes through circuit board 17 to export bigger acoustical signal.
This kind skin contact piezoelectric microphone is with the element of spring 13 as the transmission pressure vibration, and forced action type is located ceraminator 14 simultaneously.But because of spring 13 size and mechanical properties own are difficult for accurately control, add factor affecting such as overall package process, so that the quality of microphone differs, and spring 13 is the silvered faces that lean piezoelectric ceramic piece 15, often, can reduce useful life greatly because of vibration friction loss.In addition, this microphone overall package trouble, and volume and highly bigger, structure is undesirable.
The purpose of this utility model is to provide a kind of cavum laryngis acoustic control formula piezoelectric microphone of being convenient to assemble.
Another purpose of the present utility model is to provide a kind of cavum laryngis acoustic control formula piezoelectric microphone of avoiding the hurt of electromagnetic wave human body, the sheathed iron powder core body of microphone feed lines revealed section, can stop effectively that the electromagnetic wave of mobile phone passes through feed lines, avoid hurt of electromagnetic wave human body brain, low-frequency acoustic signal is more correctly transmitted.
For achieving the above object, the utility model is taked following technical measures:
The utility model mobile phone comprises the upper and lower cover with the opening that matches, piezoelectric element, the message amplifying circuit that is connected with piezoelectric element and a signal feed lines with cavum laryngis acoustic control formula piezoelectric microphone, and piezoelectric element posts on a metallic conduction sheet;
Lower cover openend internal perisporium is provided with the recessed rank of annular, for the metallic conduction sheet of placing piezoelectric element, and cooperate loam cake opening ora terminalis to be located, a circuit board is set on the metallic conduction sheet, the message amplifying circuit is located on the circuit board, feed lines is electrically connected with circuit board, and the piezoelectric patches of piezoelectric element bottom and the vibration wall of the lower cover bottom segment distance of being separated by forms a pressure oscillation space.
Wherein: described loam cake openend internal perisporium can be provided with convex annular rank that cooperate the recessed rank of described lower cover annular.
Wherein: the periphery of described metallic conduction sheet can be provided with a breach that described upper and lower cover inner space is connected.
Wherein: can be arranged with an iron powder core body on the described feed lines revealed section.
Wherein: at least one space is filled out and is provided with silica gel in the space that described piezoelectric element and upper and lower cover constitute.
Reaching embodiment in conjunction with the accompanying drawings is described in detail as follows architectural feature of the present utility model:
Description of drawings:
Fig. 1 is the assembled sectional view of existing piezoelectric microphone.
Fig. 2 is that the utility model piezoelectric microphone embodiment is assembled in the combination stereogram in the Handless.
Fig. 3 is the three-dimensional exploded view of Fig. 2.
Fig. 4 is the three-dimensional exploded view of Fig. 3 part assembly.
Fig. 5 is the cutaway view of piezoelectric microphone shown in Figure 2.
Fig. 6 is the cutaway view of another embodiment of the utility model.
Fig. 7 is the cutaway view of the utility model embodiment three.
Fig. 8 is the cutaway view of the utility model embodiment four.
Fig. 9 is the cutaway view of the utility model embodiment five.
As shown in Figure 2, it is that piezoelectric microphone embodiment of the present utility model is assembled in the combination stereogram in the Handless, wherein, the upper and lower covers 20,30 of piezoelectric microphone is installed in an end of the metallic elastic neck frame 40 of Handless, the feed lines 50,51 of this piezoelectric microphone and earphone 60 is extended suitable length outward, and connects a plug 52 jointly.
See also Fig. 2,3,4, this piezoelectric microphone adopts the hollow upper and lower covers 20,30 of plastics, upper and lower covers 20,30 is joined to holding and is had the opening that matches, on the default convex annular rank 24 of the internal perisporium of loam cake 20 openends, the internal perisporium of lower cover 30 openends is provided with annular recessed rank 34 that match, metallic conduction sheet 71 for piezoelectric element 70 is placed on the annular recessed rank 34, cooperates the convex annular rank 24 of loam cake 20 to be close to the location again, makes piezoelectric element 70 become vacant state.Piezoelectric element 70 in the utility model is a ceraminator.
Each extends a shank that matches 21,31 outward the periphery of above-mentioned upper and lower cover 20,30, at default one wire casing 22 in the bottom surface of the shank 21 of loam cake 20, pass through for feed lines 50, shank 31 end faces of lower cover 30 then prepare one chase 32 and several alignment pins 33, one end of neck frame 40 is put fitted over chase 32 places, and these alignment pins 33 are worn the relative pin-and-hole 23 of the breach 41 that fits over neck frame 40 and loam cake 20, utilize high frequency welding technology in conjunction with upper and lower cover 20,30 again, make its inner enclosure space that forms.
Shown in Fig. 2,3, iron powder core body 90 of feed lines 50,51 revealed sections combination at piezoelectric microphone and earphone 60, iron powder core body 90 dimidiation bodies, and respectively be located in the two semicircle clamshells of an able to turn on or off formula folder 91, and then cooperate relative fixture block 92, bayonet socket 93 clampings location.The electromagnetic wave that iron powder core body 90 can stop mobile phone is by feed lines 50,51, avoiding hurt of electromagnetic wave human body brain, and the low-frequency sound wave signal accurately transmitted.
The bottom of ceraminator 70 is in conjunction with a piezoelectric ceramic piece 72, the bottom surface of this piezoelectric ceramic piece 72 is provided with the electrode silvered face, then post the circuit board 80 of a message amplification and impedance matching circuit on the metallic conduction sheet 71, and as shown in Figure 5, feed lines 50, ceraminator 70 and circuit board 80 73,74,81 are electrically connected to go between to each other.Ceraminator 70 is supported to be positioned to vacant state by upper and lower cover 20,30 in the present embodiment, that is the segment distance of being separated by between the thin vibration wall 35 in the bottom of piezoelectric ceramic piece 72 and lower cover 30, constitutes a pressure oscillation space.Actual wearing in the use, neck frame 40 is interposed in caller's neck, make the vibration wall 35 of the lower cover 30 of microphone abut in neck vocal cords pleural muscle skin place, the cavum laryngis vibration is via vibrating wall 35, pressure oscillation space to transmit pressure when giving orders or instructions, make ceraminator 70 produce vibration, send acoustic signals, further utilize the bigger acoustic signals of amplifying circuit output on the circuit board 80, this structure can thoroughly completely cut off the environmental background sound of first speaker.
As shown in Figure 6, among this embodiment, the periphery of the metallic conduction sheet 71 of ceraminator 70 is preset with a breach 75, makes pressure oscillation space of common formation, inside of upper and lower cover 20,30.
As shown in Figure 7, in this embodiment, silica gel 76 is filled in loam cake 20 inner spaces, to reduce the noise that non-message is caused.
As shown in Figure 8, present embodiment then is to fill in silica gel 77 in lower cover 30 inside.
In the embodiment shown in fig. 9, with the inside of upper and lower cover 20,30 filling gel 76,77 all.The utility model utilizes superior elasticity, stability and the oxidation resistance of silica gel itself, uses as a kind of desirable transmission pressure medium.
Compared with prior art, the utlity model has following effect:
Comprehensive the above, mobile phone of the present utility model is transaudient with throat-sound controlled formula piezoelectricity Device, overall package are rapidly certain, and cost is low, and volume is light and handy, and can improve service life with Quality can thoroughly completely cut off ambient noise, and is practical.
Claims (7)
1, a kind of mobile phone comprises the upper and lower cover with the opening that matches, piezoelectric element, the message amplifying circuit that is connected with piezoelectric element and a signal feed lines with cavum laryngis acoustic control formula piezoelectric microphone, and piezoelectric element posts on a metallic conduction sheet; It is characterized in that:
Lower cover openend internal perisporium is provided with the recessed rank of annular, for the metallic conduction sheet of placing piezoelectric element, and cooperate loam cake opening ora terminalis to be located, a circuit board is set on the metallic conduction sheet, the message amplifying circuit is located on the circuit board, feed lines is electrically connected with circuit board, and the piezoelectric patches of piezoelectric element bottom and the vibration wall of the lower cover bottom segment distance of being separated by forms a pressure oscillation space.
2, piezoelectric microphone according to claim 1 is characterized in that: described loam cake openend internal perisporium is provided with convex annular rank that cooperate the recessed rank of described lower cover annular.
3, piezoelectric microphone according to claim 1 and 2 is characterized in that: the periphery of described metallic conduction sheet is provided with a breach that described upper and lower cover inner space is connected.
4, piezoelectric microphone according to claim 1 and 2 is characterized in that: be arranged with an iron powder core body on the described feed lines revealed section.
5, piezoelectric microphone according to claim 3 is characterized in that: be arranged with an iron powder core body on the described feed lines revealed section.
6, according to claim 1 or 2 or 5 described piezoelectric microphones, it is characterized in that: at least one space is filled out and is provided with silica gel in the space that described piezoelectric element and upper and lower cover constitute.
7, piezoelectric microphone according to claim 3 is characterized in that: at least one space is filled out and is provided with silica gel in the space that described piezoelectric element and upper and lower cover constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00233250 CN2428937Y (en) | 2000-05-19 | 2000-05-19 | Throat-sound controlled piezoelectric microphone for mobile telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00233250 CN2428937Y (en) | 2000-05-19 | 2000-05-19 | Throat-sound controlled piezoelectric microphone for mobile telephone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2428937Y true CN2428937Y (en) | 2001-05-02 |
Family
ID=33595643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00233250 Expired - Fee Related CN2428937Y (en) | 2000-05-19 | 2000-05-19 | Throat-sound controlled piezoelectric microphone for mobile telephone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2428937Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105726038A (en) * | 2016-03-31 | 2016-07-06 | 德清县德意电脑有限公司 | Ballistocardiogram signal collection and induction device |
| CN105769208A (en) * | 2016-03-31 | 2016-07-20 | 德清县德意电脑有限公司 | Ballistocardiogram signal collection and transmission device with improved structure |
-
2000
- 2000-05-19 CN CN 00233250 patent/CN2428937Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105726038A (en) * | 2016-03-31 | 2016-07-06 | 德清县德意电脑有限公司 | Ballistocardiogram signal collection and induction device |
| CN105769208A (en) * | 2016-03-31 | 2016-07-20 | 德清县德意电脑有限公司 | Ballistocardiogram signal collection and transmission device with improved structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |