CN204231659U - Electromagnetic pole pillar electroacoustic transducer - Google Patents
Electromagnetic pole pillar electroacoustic transducer Download PDFInfo
- Publication number
- CN204231659U CN204231659U CN201420676933.8U CN201420676933U CN204231659U CN 204231659 U CN204231659 U CN 204231659U CN 201420676933 U CN201420676933 U CN 201420676933U CN 204231659 U CN204231659 U CN 204231659U
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- CN
- China
- Prior art keywords
- set screw
- magnetic conductive
- yoke portion
- conductive board
- vibrating diaphragm
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses the electromagnetic pole pillar electroacoustic transducer in electroacoustic techniques field, the vibrating diaphragm comprising yoke portion and be made up of aluminium foil, the center attachment magnetic conductive board of vibrating diaphragm, magnetic conductive board and the bottom surface, yoke portion directly over it parallel to each other and leave gap, the center in yoke portion is provided with set screw, set screw is respectively with top crown, match near the polyamide skeleton below top crown, and the lower surface of set screw is parallel with magnetic conductive board, and and leave gap between magnetic conductive board; Coil is connected with binding post by electric wire, and envelope leaves gap between the magnet steel of polyamide skeleton outer rim; The attachment bottom crown of going to the bottom of polyamide skeleton, bottom crown and described top crown form the pole plate in yoke portion jointly; Set screw, top crown, polyamide skeleton, coil, magnet steel, bottom crown form described yoke portion jointly.Can manufacture or in the course of work, prevent yoke portion from holding magnetic conductive board on vibrating diaphragm, and can sensitivity controlled.
Description
Technical field
The utility model relates to electroacoustic techniques field, particularly a kind of electroacoustic transducer with warning function.
Background technology
In prior art, the gap between yoke portion and the magnetic conductive board being mounted on vibrating diaphragm is nonadjustable, usually needs to set according to engineering project.Usual yoke portion is made up of pole piece, pole plate, magnet steel, coil, wherein magnet steel is permanent magnet, a static magnetic field is formed between magnetic conductive board on yoke portion and vibrating diaphragm, after coil leads to audio signal, the complementary field of size and strong and weak constantly change can be produced, by audio signal, original static magnetic field is modulated, the change of the magnetic conductive board suction of below is changed with the frequency of audio signal, magnetic conductive board produces the upper and lower reciprocating type displacement of high frequency, and drive made with aluminum foil vibrating diaphragm to produce the upper and lower reciprocating deformation of high frequency, realize the conversion of electric energy to acoustic energy.
This arranges the very large shortcoming of existence: in the assembling process of transducer, mode due to assembling uses punch press to carry out punching press, because be provided with the magnet steel of permanent magnetism in yoke portion, yoke portion is inherently with certain magnetic, and the gap between yoke portion and magnetic conductive board is very little, is easy to cause yoke portion to hold magnetic conductive board, causes product rejection, even if reprocess also again pull down, can inevitably cause damage to the parts of transducer.And, even if ensure that the gap between yoke portion and magnetic conductive board in installation process, if in use collided or alternate load, yoke portion still can be caused to hold magnetic conductive board, cause scrapping of transducer.
Utility model content
The purpose of this utility model is to provide electromagnetic pole pillar electroacoustic transducer, can manufacture or prevent yoke portion from holding magnetic conductive board on vibrating diaphragm in the course of work, and can control sensitivity.
The purpose of this utility model is achieved in that electromagnetic pole pillar electroacoustic transducer, comprise yoke portion and immediately below, the vibrating diaphragm be made up of aluminium foil, yoke portion and vibrating diaphragm are fitted in plastic bonnet; The center attachment magnetic conductive board of vibrating diaphragm, magnetic conductive board and the bottom surface, yoke portion directly over it parallel to each other and leave gap, the center in yoke portion is provided with set screw, set screw is respectively with top crown, match near the polyamide skeleton below top crown, the lower surface of set screw is parallel with magnetic conductive board, and and leave gap between magnetic conductive board; Coil to be fitted on polyamide skeleton and to be connected with binding post by electric wire, and envelope leaves gap between the magnet steel of polyamide skeleton outer rim; The attachment bottom crown of going to the bottom of polyamide skeleton, bottom crown and top crown form the pole plate in yoke portion jointly; Set screw, top crown, polyamide skeleton, coil, magnet steel, bottom crown form yoke portion jointly; Top crown, bottom crown, set screw, magnetic conductive board are soft magnetic material.
The utility model in use, because top crown and bottom crown are the pole plates in yoke portion, can, by magnetic field concentration in set screw, make set screw directly can produce sucking action to magnetic conductive board; If need to regulate sensitivity, set screw can be turned, the relative magnetic conductive board of set screw is moved up and down, gap between the lower surface of set screw and magnetic conductive board is changed, the magnetic attraction that magnetic conductive board is subject to changes, the amplitude of the reciprocating deformation that made with aluminum foil vibrating diaphragm produces changes, thus realizes the adjustment to sensitivity; If produce the situation that dead magnetic conductive board is inhaled in yoke portion, as long as turn set screw, make it depart from magnetic conductive board, weaken the attraction of set screw to magnetic conductive board gradually, vibrating diaphragm correspondingly can return to the state before deformation.
Compared with prior art, the beneficial effects of the utility model are: can manufacture or prevent yoke portion from holding magnetic conductive board on vibrating diaphragm in the course of work, and the gap of yoke portion and magnetic conductive board can be adjusted according to actual needs, control the magnetic field intensity near magnetic conductive board, reach the object controlling sensitivity.
As preferred version of the present utility model, described bonnet offers some damping holes, the one side of described bonnet facing vibrating diaphragm has mounted the filament nonwoven fabric of damping action, the corresponding damping hole of mounting position of described filament nonwoven fabric.The effect of damping hole is equivalent to spiracle.A cavity is there is between vibrating diaphragm and bonnet, the inside is containing air, in the continuous vibration processes of vibrating diaphragm, the volume of the cavity between vibrating diaphragm and bonnet is in fast, among high-frequency change, if air can not get sucking in time and discharging and will have an impact to vibration of membrane of shaking, sounding effect is deteriorated; In order to address this problem, adopt the program that air can be made to appear from filament nonwoven fabric equably or to suck, and filament nonwoven fabric inherently possesses good gas permeability, the empty chamber air between vibrating diaphragm and bonnet obtains appropriate suction and discharge, optimization frequency response characteristic.
As further preferred version of the present utility model, bottom bonnet, the bound edge shell of equipped aluminum is to seal vibrating diaphragm and to encase bottom bonnet, and the program possesses very strong reliability, stabilized structure, and is easy to be press-fitted.
As further preferred version of the present utility model, described bonnet is arranged symmetrically with the damping hole that two row amounts are equal, some damping holes in each row are all as the criterion with the central shaft of set screw and circumferentially evenly arrange, practical experience proves, the program can make damping vibration effect reach optimum.
As further preferred version of the present utility model, between bottom described bound edge shell and bonnet, near press-fit has damp-proof membrane, and described damp-proof membrane is positioned at below vibrating diaphragm, and vibrating diaphragm can be protected not make moist.
As further preferred version of the present utility model, the center of top of described set screw has interior hexagonal groove, is for the ease of turning set screw with die nut, can gap length more easily between the lower surface of regulating and controlling screw and magnetic conductive board.
As further preferred version of the present utility model, between the lower surface of described set screw and magnetic conductive board, leave the gap of 0.05-0.08mm.Practical experience shows, this gap to the amplitude of variation of magnetic conductive board suction, can ensure that alarm sound meets standard by regulating and controlling screw well.
Accompanying drawing explanation
Fig. 1 is general assembly sectional view of the present utility model.
Fig. 2 is the vertical view in Fig. 1.
Wherein, 1 set screw, hexagonal groove in 1a, 2 top crowns, 3 polyamide skeletons, 4 coils, 5 magnet steel, 6 bottom crowns, 7 binding posts, 8 bonnets, 9 vibrating diaphragms, 10 magnetic conductive boards, 11 bound edge shells, 12 damping holes, 13 filament nonwoven fabrics, 14 damp-proof membranes.
Embodiment
As shown in Figure 1-2, electromagnetic pole pillar electroacoustic transducer, comprise yoke portion and immediately below, the vibrating diaphragm 9 be made up of aluminium foil, yoke portion and vibrating diaphragm 9 are fitted in plastic bonnet 8; The center attachment magnetic conductive board 10 of vibrating diaphragm 9, magnetic conductive board 10 is parallel to each other and leave gap with the bottom surface, yoke portion directly over it, the center in yoke portion is provided with set screw 1, set screw 1 is respectively with top crown 2, match near the polyamide skeleton 3 below top crown 2, the lower surface of set screw 1 is parallel with magnetic conductive board 10, and and leave gap between magnetic conductive board 10; Coil 4 to be fitted on polyamide skeleton 3 and to be connected with binding post 7 by electric wire, and envelope leaves gap between the magnet steel 5 of polyamide skeleton 3 outer rim; The attachment bottom crown 6 of going to the bottom of polyamide skeleton 3, bottom crown 6 and top crown 2 form the pole plate in yoke portion jointly; Set screw 1, top crown 2, polyamide skeleton 3, coil 4, magnet steel 5, bottom crown 6 form yoke portion jointly; Top crown 2, bottom crown 6, set screw 1, magnetic conductive board 10 are soft magnetic material.
Above-mentioned bonnet 8 offers some damping holes 12, and the one side of bonnet 8 facing vibrating diaphragm 9 has mounted the filament nonwoven fabric 13 of damping action, the corresponding damping hole 12 of mounting position of filament nonwoven fabric 13.Air can be made to appear from filament nonwoven fabric 13 equably or to suck, and filament nonwoven fabric 13 inherently possesses good gas permeability, air obtains appropriate suction and discharge, optimal damping vibrating effect.
Bottom above-mentioned bonnet 8, the bound edge shell 11 of equipped aluminum is to seal vibrating diaphragm 9 and to encase bottom bonnet 8, stabilized structure, and is easy to be press-fitted.
Above-mentioned bonnet 8 is arranged symmetrically with the damping hole 12 that two row amounts are equal, the some damping holes 12 in each row are all as the criterion with the central shaft of set screw 1 and circumferentially evenly arrange, and practical experience proves, the program can make damping vibration effect reach optimum.
Between bottom above-mentioned bound edge shell 11 and bonnet 8, near press-fit has damp-proof membrane 14, and damp-proof membrane 14 is positioned at below vibrating diaphragm 9, and vibrating diaphragm 9 can be protected not make moist.
The center of top of above-mentioned set screw 1 has interior hexagonal groove 1a, is beneficial to die nut and turns set screw 1.
Leave the gap of 0.05-0.08mm between the lower surface of above-mentioned set screw 1 and magnetic conductive board 10, this gap can the amplitude of variation of regulating and controlling screw 1 pair of magnetic conductive board 10 suction well, ensures that alarm sound meets standard.
During use, because top crown 2 and bottom crown 6 are the pole plates in yoke portion, can, by magnetic field concentration in set screw 1, make set screw 1 directly can produce sucking action to magnetic conductive board 10; If need to regulate sensitivity, set screw 1 can be turned, the relative magnetic conductive board 10 of set screw 1 is moved up and down, gap between the lower surface of set screw 1 and magnetic conductive board 10 is changed, the magnetic attraction that magnetic conductive board 10 is subject to changes, the amplitude of the reciprocating deformation that made with aluminum foil vibrating diaphragm 9 produces changes, thus realizes the adjustment to sensitivity; If produce the situation that dead magnetic conductive board 10 is inhaled in yoke portion, as long as turn set screw 1, make it depart from magnetic conductive board 10, weaken the attraction of set screw 1 pair of magnetic conductive board 10 gradually, vibrating diaphragm 9 correspondingly can return to the state before deformation.
The utility model is not limited to above-described embodiment; on the basis of technical scheme disclosed in the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some to some technical characteristics wherein to replace and distortion, these are replaced and are out of shape all in protection range of the present utility model.
Claims (7)
1. electromagnetic pole pillar electroacoustic transducer, comprise yoke portion and immediately below, the vibrating diaphragm (9) be made up of aluminium foil, described yoke portion and vibrating diaphragm (9) are fitted in plastic bonnet (8); Center attachment magnetic conductive board (10) of described vibrating diaphragm (9), described magnetic conductive board (10) is parallel to each other and leave gap with the bottom surface, yoke portion directly over it, it is characterized in that: the center in described yoke portion is provided with set screw (1), described set screw (1) respectively with top crown (2), near top crown (2) below polyamide skeleton (3) match, the lower surface of described set screw (1) is parallel with magnetic conductive board (10), and and leave gap between magnetic conductive board (10); Coil (4) is fitted in polyamide skeleton (3) and goes up and be connected with binding post (7) by electric wire, and envelope leaves gap between the magnet steel (5) of polyamide skeleton (3) outer rim; Attachment bottom crown (6) of going to the bottom of described polyamide skeleton (3), described bottom crown (6) and described top crown (2) form the pole plate in yoke portion jointly; Yoke portion described in described set screw (1), top crown (2), polyamide skeleton (3), coil (4), magnet steel (5), bottom crown (6) are formed jointly; Described top crown (2), bottom crown (6), set screw (1), magnetic conductive board (10) are soft magnetic material.
2. electromagnetic pole pillar electroacoustic transducer according to claim 1, it is characterized in that: described bonnet (8) offers some damping holes (12), the one side of described bonnet (8) facing vibrating diaphragm (9) has mounted the filament nonwoven fabric (13) of damping action, the corresponding damping hole (12) of mounting position of described filament nonwoven fabric (13).
3. electromagnetic pole pillar electroacoustic transducer according to claim 1, is characterized in that: be equipped with the bound edge shell (11) of aluminum in bonnet (8) bottom to seal vibrating diaphragm (9) and to encase bonnet (8) bottom.
4. electromagnetic pole pillar electroacoustic transducer according to claim 2, it is characterized in that: the damping hole (12) that two row amounts that described bonnet (8) is arranged symmetrically with are equal, the some damping holes (12) in each row are all as the criterion with the central shaft of set screw (1) and circumferentially evenly arrange.
5. electromagnetic pole pillar electroacoustic transducer according to claim 3, is characterized in that: between described bound edge shell (11) and bonnet (8) bottom, near press-fit has damp-proof membrane (14), and described damp-proof membrane (14) is positioned at vibrating diaphragm (9) below.
6. electromagnetic pole pillar electroacoustic transducer according to claim 1, is characterized in that: the center of top of described set screw (1) has interior hexagonal groove (1a).
7. the electromagnetic pole pillar electroacoustic transducer according to any one of claim 1-6, is characterized in that: the gap leaving 0.05-0.08mm between the lower surface of described set screw (1) and magnetic conductive board (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676933.8U CN204231659U (en) | 2014-11-13 | 2014-11-13 | Electromagnetic pole pillar electroacoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420676933.8U CN204231659U (en) | 2014-11-13 | 2014-11-13 | Electromagnetic pole pillar electroacoustic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204231659U true CN204231659U (en) | 2015-03-25 |
Family
ID=52929701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420676933.8U Expired - Fee Related CN204231659U (en) | 2014-11-13 | 2014-11-13 | Electromagnetic pole pillar electroacoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204231659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106231507A (en) * | 2016-08-26 | 2016-12-14 | 广东欧珀移动通信有限公司 | A kind of vibrating diaphragm, speaker, sound chamber assembly and terminal |
-
2014
- 2014-11-13 CN CN201420676933.8U patent/CN204231659U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106231507A (en) * | 2016-08-26 | 2016-12-14 | 广东欧珀移动通信有限公司 | A kind of vibrating diaphragm, speaker, sound chamber assembly and terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20151113 |
|
| EXPY | Termination of patent right or utility model |