CN106060736B - Balanced armature type telephone receiver - Google Patents
Balanced armature type telephone receiver Download PDFInfo
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- CN106060736B CN106060736B CN201610503789.1A CN201610503789A CN106060736B CN 106060736 B CN106060736 B CN 106060736B CN 201610503789 A CN201610503789 A CN 201610503789A CN 106060736 B CN106060736 B CN 106060736B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/02—Loudspeakers
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Dc Machiner (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The embodiment of the invention discloses a balanced armature type receiver, which comprises an armature, a magnet and a tubular jaw iron, wherein a first magnet part of the magnet is a cuboid, the long edge of a working plane of the first magnet part is parallel to the side surface of the armature, and the length of the short edge of the working plane of the first magnet part is smaller than the tube inner width of the jaw iron, namely the first magnet part cannot be very close to or directly abut against the inner chamfer of the jaw iron, so that the strength of a direct-current magnetic field saturation region at the inner chamfer of the jaw iron is reduced, even the direct-current magnetic field saturation region at the inner chamfer of the jaw iron can be removed, the occurrence of sound distortion in the traditional mode is reduced, and the sensitivity of the balanced armature type receiver is improved.
Description
Technical Field
The invention relates to the field of receivers, in particular to a balanced armature type receiver.
Background
Balanced Armature receivers (Balance Armature receivers) may also be referred to as moving-iron receivers. As shown in fig. 1a, the balanced Armature receiver mainly includes an Armature 1(Armature), a Diaphragm 2(Diaphragm), and a Magnet 4(Magnet), wherein both magnets 4 are disposed in a yoke 5, as shown in fig. 1 b. When current passes through the coil wound on the armature 1, an alternating magnetic field is generated on the armature 1, and the portion of the armature 1 between the two magnets 4 can be called a vibrating wing. Along with the change of the alternating magnetic field, the vibration wing can do reciprocating vibration under the action of the magnetic force between the magnets 4. The reciprocating vibration of the vibration wing drives the diaphragm 2 through the driving Rod 3(Drive Rod), so that the diaphragm vibrates. Air in the front cavity of the balanced armature type receiver can be exhausted or sucked by the vibration of the diaphragm 2, so that sound pressure is generated at the sound guide pipe opening of the receiver, and sound waves are emitted.
In the receiver industry, a conventional theory is that the larger the sound pressure level of the receiver is, the better the listening experience is provided to the user, so this theory is mostly followed when designing a balanced armature receiver. In order to increase the sound pressure level of the balanced armature type receiver, the sound pressure level can be increased by increasing the dc magnetic field in the balanced armature type receiver, wherein a direct way is to increase the area of the surface of the magnet facing the armature in the balanced armature type receiver.
In order to improve the beauty and wearing comfort, the volume of the balance armature type receiver is smaller and smaller at present, so that the space in the balance armature type receiver is limited, especially the space in the jaw iron. However, in order to ensure the sound pressure level, the size of the magnet needs to be as large as possible, so that the outer edge portion of the magnet is very close to the inner chamfer of the blade iron. The balanced armature type receiver with the structural design has the defects of sound production distortion, low sensitivity and low user experience.
Disclosure of Invention
In order to solve the technical problem, the invention provides a balanced armature type receiver, which reduces the occurrence of sounding distortion in the traditional mode and improves the sensitivity of the balanced armature type receiver.
The embodiment of the invention discloses the following technical scheme:
a balanced armature receiver comprising an armature, a magnet and a tubular jaw iron:
the magnet includes first magnet part and second magnet part, first magnet part is the cuboid, wherein first magnet part orientation the working plane of armature is the rectangle, the long limit of the working plane of first magnet part with the side of armature is parallel, the short side length of the working plane of first magnet part is less than the intraductal width of sword iron.
Optionally, the width in the pipe is a distance between inner chamfers on two sides of the pipe surface part of the jaw iron, and the pipe surface part is a pipe surface part for arranging the first magnet part.
Optionally, the first and second magnet portions are each disposed in the tube of the yoke such that a projection of the armature onto a working plane of the second magnet portion is entirely in a projection of the first magnet portion onto a working plane of the second magnet portion.
Optionally, the length of the short side of the working plane of the first magnet portion is greater than or equal to the width of the armature.
Optionally, the second magnet portion is the same size as the first magnet portion.
According to the technical scheme, in the balanced armature formula receiver of the indisputable iron of a sword including armature, magnet and tubulose, the first magnet part that this magnet includes is the cuboid, and the long limit of the working plane of this first magnet part with the side of armature is parallel, the minor face length of the working plane of first magnet part is less than the intraductal width of the indisputable iron of a sword, that is to say this first magnet part will not be very close to or directly support the interior chamfer of the indisputable iron of a sword to reduced the intensity in the DC magnetic field saturation region of the interior chamfer of the indisputable iron of a sword, can get rid of the DC magnetic field saturation region of the interior chamfer of the indisputable iron of a sword even, reduced the condition that the sound production distortion that appears in the traditional mode, improved the sensitivity of this balanced armature formula receiver.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1a is a schematic diagram of a longitudinal cross section of a balanced armature receiver;
FIG. 1b is a schematic diagram of the relationship between the blade iron and the magnet in a balanced armature receiver;
fig. 2 is a schematic structural diagram of a balanced armature receiver according to an embodiment of the present invention;
fig. 3a is a schematic structural diagram of a transverse cross section of a balanced armature receiver according to an embodiment of the present invention;
fig. 3b is a schematic diagram of a lateral cross-section of a balanced armature receiver.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the telephone receiver industry, it is generally believed that increasing the sound pressure level of the telephone receiver can improve the listening experience of the telephone receiver for the user. For the balanced armature type receiver, the working area of the magnet is mostly increased to increase the direct current magnetic field in the balanced armature type receiver, so that the sound pressure level of the receiver is improved by a larger direct current magnetic field.
However, this blind increase of the working area of the magnet causes a problem that the balanced armature type receiver is distorted in sound production and low in sensitivity. The problem is particularly obvious for the common small-volume balanced armature type receiver at present.
The inventor has found that many receivers are designed to have a magnet working area as large as possible in the jaw iron even up to the limit size of the inside of the jaw iron when the space inside the jaw iron is small. In this case the outer edge portion of the magnet will be very close to or even directly against the inner chamfer of the blade, e.g. as shown in fig. 1b, the sides of the magnet 4 already very close to the inner chamfer area of the blade 5.
Further, in many cases, manufacturers have set the magnets to have square working planes so that four corners of the magnets may abut against the inner chamfered corners of the blade iron. Leading to dc magnetic field saturation at the inner chamfer part of the jaw iron, for example, in experimental simulation, under the conventional structure, the magnetic field strength at the inner chamfer part of the jaw iron can reach 0.92T, which is very close to the saturation point (1.18T) of the material.
The saturated dc magnetic field may affect the passing of the ac magnetic field in the balanced armature type receiver, thereby affecting the sound production and sensitivity performance of the balanced armature type receiver, for example, the problem of sound production distortion occurs.
To solve this problem, the inventor throws away the conventional theory that increasing the sound pressure level of the receiver can improve the listening experience of the receiver for the user. On the contrary, by changing the shape of the magnet, particularly, by changing the width of the magnet with respect to the armature, the strength of the dc magnetic field saturation region at the inner chamfer of the blade is reduced, and even the dc magnetic field saturation region at the inner chamfer of the blade can be removed.
Therefore, an embodiment of the present invention provides a balanced armature receiver, including an armature, a magnet and a tubular jaw iron, in which the first magnet portion included in the magnet is a rectangular parallelepiped, a long side of a working plane of the first magnet portion is parallel to a side surface of the armature, and a short side length of the working plane of the first magnet portion is smaller than a tube inner width of the jaw iron, that is, the first magnet portion will not be very close to or directly abut against an inner chamfer of the jaw iron, so as to reduce a dc magnetic field saturation region at an inner chamfer of the jaw iron, and even remove the dc magnetic field saturation region at the inner chamfer of the jaw iron, thereby reducing distortion occurring in a conventional sounding manner, and improving sensitivity of the balanced armature receiver.
Fig. 2 is a schematic structural diagram of a balanced armature receiver according to an embodiment of the present invention, which includes an armature 10, a magnet 20, and a tubular yoke 30.
The magnet 20 includes a first magnet portion 21 and a second magnet portion 22, the first magnet portion 21 is a rectangular parallelepiped, wherein a working plane of the first magnet portion 21 facing the armature 10 is rectangular, a long side of the working plane of the first magnet portion 21 is parallel to a side surface of the armature 10, and a short side length of the working plane of the first magnet portion 21 is smaller than a tube inner width of the yoke 30.
First, it is necessary to clarify the side surface of the armature 10, and in general, the side surface of the armature 10, which can be a U-shape, is defined as the side surface of the armature 10, while the armature 10 is a U-shape.
In the balanced armature type receiver, a vibrating wing of the armature 10 for vibration is generally disposed between the first magnet portion 21 and the second magnet portion 22. The first magnet portion 21 and the second magnet portion 22 each have a flap that faces the armature 10. The surface of the first magnet portion 21 facing the vibrating wing of the armature 10 may be a working plane of the first magnet portion 21, and the surface of the second magnet portion 22 facing the vibrating wing of the armature 10 may be a working plane of the second magnet portion 22.
In the arrangement of the first magnet portion 21, the first magnet portion 21 is provided as a rectangular parallelepiped. By the positional relationship between the armature 10 and the first magnet portion 21, that is, the long side of the working plane of the first magnet portion 21 is parallel to the side face of the armature 10, and the armature 10 is inserted in the yoke 30 in the axial direction of the yoke 30, that is, when the first magnet portion 21 is provided in the yoke 30, the long side of the working plane of the first magnet portion 21 coincides with the axial direction of the yoke 30.
Since the length of the short side of the working plane of the first magnet portion 21 is smaller than the in-pipe width of the blade 30, the in-pipe width described here may be embodied as the distance between the inner chamfers on both sides of the pipe face portion of the blade 30, which is the pipe face portion for disposing the first magnet portion 21. When the first magnet portion 21 is provided in the blade 30, the outer edge portion of the first magnet portion 21 does not come close to the inner chamfer of the blade 30, and does not abut against the inner chamfer of the blade 30. The inner chamfer of the blade 30 means a portion where the inner surface of the blade 30 is bent significantly, for example, when the blade 30 is a square tube, the inner chamfer is a portion where the inner surface of the blade 30 is bent approximately 90 degrees. Further referring to the drawings, fig. 3a is a schematic structural diagram of a transverse cross section of a balanced armature type receiver according to an embodiment of the present invention, and it can be seen that two sides of the first magnet portion 21 are far from the inner chamfered region of the blade iron 30, which does not cause the dc magnetic field at the inner chamfered region of the blade iron to be too saturated, and fig. 3b is a transverse cross section of a conventional balanced armature type receiver, as is apparent from fig. 3a, the magnet 4 in fig. 3b is very close to the inner chamfered region of the blade iron 5, which obviously causes the dc magnetic field at the inner chamfered region of the blade iron to be saturated.
It is thus clear that the first magnet part that sets up the cuboid has reduced the intensity in the dc magnetic field saturation region of the internal chamfer angle of sword iron, can get rid of the dc magnetic field saturation region of the internal chamfer angle of sword iron even, has reduced the condition that the sound production distortion that appears in the traditional mode, has improved the sensitivity of this balanced armature formula receiver.
And compared with the magnet with a square working plane in the traditional mode, the magnet made into the cuboid can further save magnet materials, and the cost of the balanced armature type telephone receiver is reduced.
When the first magnet portion 21 and the second magnet portion 22 are arranged in a tubular configuration in the yoke 30, the centre lines of the first magnet portion 21, the second magnet portion 22 and the armature 10 may lie in the same plane, thereby allowing the projection of the armature 10 onto the working plane of the second magnet portion 22 to lie entirely within the projection of the first magnet portion 21 onto the working plane of the second magnet portion 22.
The projection referred to herein refers to a forward projection, for example, the projection of the armature 10 on the second magnet portion 22 may be the projection of the armature 10 on a working plane perpendicular to the second magnet portion 22.
That is, the width of the first magnet portion 21 cannot be too narrow, otherwise the sound pressure level will be difficult to secure, and the direct current magnetic field formed by the magnet 20 may not be sufficient to push the armature.
It can be seen that by reducing the magnet, the magnetic field saturation does not occur at the inner chamfer portion inside the blade iron 30, thereby effectively alleviating the distortion problem caused by the saturation, but the magnet is not reduced too much, the minimum width of the magnet needs to cover the armature in the vertical direction, and thus the armature can be effectively pushed by the direct-current magnetic field.
Alternatively, the length of the short side of the working plane of the first magnet portion 21 is equal to or greater than the width of the armature 10.
It can be seen that the projection of the armature on the working plane of the second magnet portion is completely in the projection of the first magnet portion on the working plane of the second magnet portion, so that the working plane of the magnet is enough to cover the armature in the vertical direction, and the balanced armature type telephone receiver is in a more balanced state, i.e. the direct-current magnetic field is not saturated by the magnetic field in the inner chamfer area of the jaw iron, and the alternating-current magnetic field can effectively pass through the inner chamfer area, so that the direct-current magnetic field formed by the magnet can still push the armature, and the sound production function of the balanced armature type telephone receiver is realized.
Accordingly, the magnet 20 may include the second magnet portion 22 having the same size as the first magnet portion 21, and thus be symmetrically disposed on both sides of the vibration wing of the armature 10. For the description of the dimensions of the second magnet portion 22, reference may be made to the description of the first magnet portion 21, which is not repeated here.
It should be noted that, in the present specification, all the embodiments are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The above-described apparatus and system embodiments are merely illustrative, in which elements described as separate components may or may not be physically separate, and components shown as units may or may not be physical units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A balanced armature receiver comprising an armature, a magnet and a tubular jaw iron:
the magnet includes first magnet part and second magnet part, first magnet part is the cuboid, wherein first magnet part orientation the working plane of armature is the rectangle, the long limit of the working plane of first magnet part with the side of armature is parallel, the short side length of the working plane of first magnet part is less than the intraductal width of sword iron.
2. The balanced armature type receiver according to claim 1, wherein the tube inner width is a distance between inner chamfers on both sides of a tube surface portion of the blade iron, the tube surface portion being a tube surface portion for disposing the first magnet portion.
3. A balanced armature receiver according to claim 1 in which the first and second magnet portions are each disposed in the tube of the yoke such that the projection of the armature onto the working plane of the second magnet portion is wholly in the projection of the first magnet portion onto the working plane of the second magnet portion.
4. The balanced armature type receiver of claim 3, wherein the length of the short side of the working plane of the first magnet portion is equal to or greater than the width of the armature.
5. The balanced armature receiver according to any of claims 1 to 4 wherein the size of the second magnet portion is the same as the size of the first magnet portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503789.1A CN106060736B (en) | 2016-06-30 | 2016-06-30 | Balanced armature type telephone receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503789.1A CN106060736B (en) | 2016-06-30 | 2016-06-30 | Balanced armature type telephone receiver |
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| Publication Number | Publication Date |
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| CN106060736A CN106060736A (en) | 2016-10-26 |
| CN106060736B true CN106060736B (en) | 2021-03-23 |
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| CN201610503789.1A Active CN106060736B (en) | 2016-06-30 | 2016-06-30 | Balanced armature type telephone receiver |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110933564B (en) * | 2019-11-26 | 2021-07-27 | 歌尔股份有限公司 | Magnetic conductive plate for sound production device and sound production device |
| CN111083610A (en) * | 2019-12-13 | 2020-04-28 | 瑞声科技(新加坡)有限公司 | Sound production device |
| CN114173266A (en) * | 2021-11-30 | 2022-03-11 | 苏州迪倍电子科技有限公司 | Jaw iron structure of moving iron horn |
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| CN1969590A (en) * | 2004-06-14 | 2007-05-23 | 美商楼氏电子有限公司 | Magnet assembly for a transducer |
| CN102984613A (en) * | 2011-09-05 | 2013-03-20 | 索尼公司 | Driver unit and earphone device |
| CN103024647A (en) * | 2011-09-23 | 2013-04-03 | 苏州恒听电子有限公司 | Moving iron type microphone unit for bone-conduction hearing aid and loudspeaker |
| CN103152664A (en) * | 2013-03-26 | 2013-06-12 | 苏州恒听电子有限公司 | Telephone receiver with improved structure |
| CN103747401A (en) * | 2013-12-27 | 2014-04-23 | 苏州恒听电子有限公司 | A sandwich vibrating-armature receiver |
| CN205921746U (en) * | 2016-06-30 | 2017-02-01 | 苏州三色峰电子有限公司 | Balanced armature type receiver |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9100740B2 (en) * | 2013-05-31 | 2015-08-04 | Lai-Shi Huang | Innovative magnetic design for speakers |
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2016
- 2016-06-30 CN CN201610503789.1A patent/CN106060736B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1969590A (en) * | 2004-06-14 | 2007-05-23 | 美商楼氏电子有限公司 | Magnet assembly for a transducer |
| CN102984613A (en) * | 2011-09-05 | 2013-03-20 | 索尼公司 | Driver unit and earphone device |
| CN103024647A (en) * | 2011-09-23 | 2013-04-03 | 苏州恒听电子有限公司 | Moving iron type microphone unit for bone-conduction hearing aid and loudspeaker |
| CN103152664A (en) * | 2013-03-26 | 2013-06-12 | 苏州恒听电子有限公司 | Telephone receiver with improved structure |
| CN103747401A (en) * | 2013-12-27 | 2014-04-23 | 苏州恒听电子有限公司 | A sandwich vibrating-armature receiver |
| CN205921746U (en) * | 2016-06-30 | 2017-02-01 | 苏州三色峰电子有限公司 | Balanced armature type receiver |
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