CN105979420A - Moving-coil type earphone and method for reducing electromagnetic radiation of the same - Google Patents
Moving-coil type earphone and method for reducing electromagnetic radiation of the same Download PDFInfo
- Publication number
- CN105979420A CN105979420A CN201610458945.7A CN201610458945A CN105979420A CN 105979420 A CN105979420 A CN 105979420A CN 201610458945 A CN201610458945 A CN 201610458945A CN 105979420 A CN105979420 A CN 105979420A
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- CN
- China
- Prior art keywords
- voice coil
- coil
- earphone
- loudspeaker voice
- circuit board
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Classifications
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a moving-coil type earphone and method for reducing electromagnetic radiation of the same. The earphone comprises a shell, a loudspeaker monomer and a circuit board, the loudspeaker monomer is arranged in a cavity surrounded by the shell; the loudspeaker monomer comprises a magnetic circuit system and a vibration system composed of a vibration diaphragm and a voice coil; the voice coil generates an electromagnetic field while inputting changed audio current from the circuit board, and moves up and down in the magnetic circuit system so as to drive the vibration diaphragm to vibrate to produce a sound signal; the earphone further comprises a coil with the same axis winding with the voice coil, the coil is used for producing the electromagnetic field opposite to the direction of electromagnetic field produced by the voice coil so as to lower the electromagnetic radiation of the earphone, and reduce the injury to the human body.
Description
Technical field
The present invention relates to earphone field, particularly to a kind of moving coil earphone and reduction moving coil earphone electromagnetism
The method of radiation.
Background technology
Conventional moving coil earphone, runs through the magnetic line of force formed by magnetic circuit system around voice coil loudspeaker voice coil, works as sound
When circle inputs the tone currents of change, due to hot-wire coil electromagnetic induction effect in magnetic field, voice coil loudspeaker voice coil
Magnetic field force induced effect produces corresponding motion, and transfers the motion to coupled vibrating diaphragm, voice coil loudspeaker voice coil and
Vibrating diaphragm vibrates together and produces acoustical signal.
When sound horn, owing to the tone currents in voice coil loudspeaker voice coil is continually changing, therefore earphone can be outwards
Radiate certain electromagnetic field, and when user uses earphone earphone with head laminating closely, therefore earphone to
Human body can be caused certain injury by extraradial electromagnetic field.
Summary of the invention
In view of the above problems, the invention provides a kind of moving coil earphone and reduce moving coil earphone electromagnetism spoke
The method penetrated, to solve the outside radiation field of earphone of the prior art, causes certain injury to human body
Problem.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
The present invention provides a kind of moving coil earphone, and described moving coil earphone includes housing, horn single body and electricity
Road plate, described horn single body is arranged in the cavity that described housing surrounds, including magnetic circuit system with by vibrating diaphragm
The vibrational system constituted with voice coil loudspeaker voice coil；Described circuit board to described voice coil loudspeaker voice coil input tone currents time, described voice coil loudspeaker voice coil
Produce electromagnetic field, and move up and down in described magnetic circuit system, drive described diaphragm oscillations to produce sound letter
Number；Described moving coil earphone also includes and the coil of described voice coil loudspeaker voice coil concentric coiling, inputs in described coil
The electromagnetic field in opposite direction with the electromagnetic field that described voice coil loudspeaker voice coil produces is produced, to reduce described moving-coil type during electric current
The electromagnetic radiation of earphone.
Alternatively, described coil is contrary with the direction of winding of described voice coil loudspeaker voice coil, and in described coil, input is with described
The electric current that the voice coil loudspeaker voice coil sense of current is identical；
Or, described coil is identical with the direction of winding of described voice coil loudspeaker voice coil, input and described sound in described coil
The electric current that loop current is in opposite direction.
Alternatively, described coil is connected to described circuit board by described voice coil loudspeaker voice coil, and connects with described voice coil loudspeaker voice coil
Or parallel connection receives the electric current of input；
Or, described coil is directly connected to described circuit board, receives the electricity of input from described circuit board
Stream.
Alternatively, according to coil described in the electromagnetic field intensity of described voice coil loudspeaker voice coil can around linear dimension and winding turns
Adjust.
Alternatively, described coil and described horn single body or assembling fixing with described housing, it is arranged on institute
State front or the back side of horn single body.
The present invention also provides for a kind of method reducing moving coil earphone electromagnetic radiation, described moving coil earphone bag
Including housing, horn single body and circuit board, described horn single body is arranged in the cavity that described housing surrounds,
Including magnetic circuit system and the vibrational system that is made up of vibrating diaphragm and voice coil loudspeaker voice coil；Described circuit board inputs to described voice coil loudspeaker voice coil
During tone currents, described voice coil loudspeaker voice coil produces electromagnetic field, and moves up and down in described magnetic circuit system, drives institute
State diaphragm oscillations and produce acoustical signal；Described method includes:
The coil of one and described voice coil loudspeaker voice coil concentric coiling is set in described moving coil earphone, to described coil
Middle input current makes the electromagnetic field that it produces with described voice coil loudspeaker voice coil produces electromagnetic field is in opposite direction, to reduce
State the electromagnetic radiation of earphone.
Alternatively, described coil is contrary with the direction of winding of described voice coil loudspeaker voice coil, in described coil input with
The electric current that the described voice coil loudspeaker voice coil sense of current is identical；
Or described coil is identical with the direction of winding of described voice coil loudspeaker voice coil, and in described coil, input is with described
The electric current that the voice coil loudspeaker voice coil sense of current is contrary.
Alternatively, described coil is connected to described circuit board by described voice coil loudspeaker voice coil, and with described voice coil loudspeaker voice coil string
Connection or parallel connection are to receive the electric current of input；
Or, described coil is directly connected to the circuit board of described earphone, receives from described circuit board
The electric current of input.
Alternatively, according to the electromagnetic field intensity of described voice coil loudspeaker voice coil adjust described coil around linear dimension and coiling
Number.
Alternatively, described coil is arranged on front or the back side of horn single body, and with horn single body or
Assembling fixing with earphone case.
The invention has the beneficial effects as follows: the present invention provides a kind of moving coil earphone and reduces moving coil earphone electricity
The method of magnetic radiation, this kind of earphone is provided by the coil of one and voice coil loudspeaker voice coil concentric coiling, to described line
In circle, input current makes it produce the electromagnetic field in opposite direction with the electromagnetic field of voice coil loudspeaker voice coil generation, such that it is able to fall
The electromagnetic radiation of low earphone, reduces the injury causing human body.
Accompanying drawing explanation
Fig. 1 is the structural representation of moving coil earphone of the prior art；
Fig. 2 is the structural representation of the moving coil earphone of the embodiment of the present invention；
Fig. 3 is the flow chart of the method reducing moving coil earphone electromagnetic radiation of the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this
Bright embodiment is described in further detail.
As it is shown in figure 1, moving coil earphone of the prior art includes housing 1 ', horn single body 5 ' and circuit
Plate 6 ', horn single body 5 ' is arranged in the cavity that housing 1 ' surrounds, and horn single body 5 ' includes magnetic circuit system
2 ' and the vibrational system that is made up of vibrating diaphragm 3 ' and voice coil loudspeaker voice coil 4 '.Voice coil loudspeaker voice coil 4 ' is from the sound of circuit board 6 ' input change
Frequently during electric current, due to energized coils electromagnetic induction effect in magnetic field, the work that voice coil loudspeaker voice coil 4 ' is magnetic field force induced
With producing corresponding motion, and transfer the motion to coupled vibrating diaphragm 3 ', voice coil loudspeaker voice coil 4 ' and vibrating diaphragm 3 '
Vibrate together and produce acoustical signal.
As in figure 2 it is shown, the embodiment of the present invention provides a kind of moving coil earphone, except including in prior art
Outside housing 1, horn single body 5 and circuit board 6 in earphone, this kind of moving coil earphone also includes and voice coil loudspeaker voice coil
The coil 7 of 4 concentric coilings, produces the electromagnetic field side produced with voice coil loudspeaker voice coil 4 during input current in coil 7
To contrary electromagnetic field, the electromagnetic field that therefore coil 7 produces is with earphone to extraradial electromagnetic field direction also
On the contrary, such that it is able to reduce the electromagnetic radiation of earphone, the injury that human body is caused is reduced.
Specifically, for making coil 7 produce the electromagnetic field in opposite direction with voice coil loudspeaker voice coil 4 electromagnetic field, can use
Following two mode: Yi Zhongshi, coil 7 is contrary with the direction of winding of voice coil loudspeaker voice coil 4, input in coil 7
Electric current is identical with the sense of current of input in voice coil loudspeaker voice coil 4.Another kind is, coil 7 and the coiling side of voice coil loudspeaker voice coil 4
To identical, in coil 7, the electric current of input is contrary with the sense of current of input in voice coil loudspeaker voice coil 4.
The mode of coil 7 input current is as follows: coil 7 is by receiving input with voice coil loudspeaker voice coil 4 serial or parallel connection
Electric current；Or, coil 7 is directly connected to circuit board 6, receives the electric current of input from circuit board 6,
This electric current mates with the tone currents in voice coil loudspeaker voice coil.
By test horn front electromagnetic field intensity, electromagnetic field that coil 7 produce is adjusted flexibly, with maximum
Degree ground reduces the electromagnetic radiation intensity of earphone.Coil 7 produces the big I of electromagnetic field by adjusting coil
7 around linear dimension, coiling 7 number and from circuit board 6, access the size of electric current realize.
The shape of coil 7 can be circular, square or other polygons.Coil 7 and horn single body 5
Or after assembling fixing with housing 1, it is arranged on front or the back side of horn single body 5.
As it is shown on figure 3, the embodiment of the present invention also provides for a kind of method reducing moving coil earphone electromagnetic radiation,
Including:
Step 310: the coil of one and voice coil loudspeaker voice coil concentric coiling is set in described moving coil earphone.
Step 320: input current makes it produce the electromagnetic field side produced with described voice coil loudspeaker voice coil in described coil
To contrary electromagnetic field, to reduce the electromagnetic radiation of described earphone.
Specifically, in step 320, for making coil produce the electromagnetic field in opposite direction with voice coil loudspeaker voice coil electromagnetic field,
Following two method can be used: make described coil contrary with the direction of winding of described voice coil loudspeaker voice coil, at described line
Circle inputs the electric current identical with the described voice coil loudspeaker voice coil sense of current；
Or, make described coil identical with the direction of winding of described voice coil loudspeaker voice coil, input and institute in described coil
State the electric current that the voice coil loudspeaker voice coil sense of current is contrary.
As follows in the method for coil input current: described coil is connected to described circuit by described voice coil loudspeaker voice coil
Plate, and with described voice coil loudspeaker voice coil serial or parallel connection, with receive input electric current；
Or, described coil is directly connected to the circuit board of described earphone, receives from described circuit board
The electric current of input, this electric current mates with the tone currents in voice coil loudspeaker voice coil.
By test horn front electromagnetic field intensity, electromagnetic field that coil produce is adjusted flexibly, with maximum journey
Degree ground reduces the electromagnetic radiation intensity of earphone.The big I of coil generating electromagnetic field is by adjusting described coil
Around linear dimension, winding turns and from circuit board, access the size of electric current realize.
Described coil is arranged on front or the back side of horn single body；Described coil and horn single body or and ear
The fixing assembling of casing body.
In sum, the embodiment of the present invention provides the benefit that: a kind of moving-coil that the embodiment of the present invention provides
Formula earphone and the method reducing moving coil earphone electromagnetic radiation, this kind of earphone be provided with one with voice coil loudspeaker voice coil concentric
The coil of coiling, coil is used for producing the electromagnetic field in opposite direction with the electromagnetic field of voice coil loudspeaker voice coil generation, thus can
To reduce the electromagnetic radiation of earphone, reduce the injury that human body is caused.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the protection model of the present invention
Enclose.All any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention, all
Comprise within the scope of the present invention.
Claims (10)
1. a moving coil earphone, described moving coil earphone includes housing, horn single body and circuit board, institute
State horn single body to be arranged in the cavity that described housing surrounds, including magnetic circuit system with by vibrating diaphragm and voice coil loudspeaker voice coil structure
The vibrational system become；Described circuit board is when described voice coil loudspeaker voice coil input tone currents, and described voice coil loudspeaker voice coil produces electromagnetism
, and move up and down in described magnetic circuit system, drive described diaphragm oscillations to produce acoustical signal；It is special
Levying and be, described moving coil earphone also includes and the coil of described voice coil loudspeaker voice coil concentric coiling, in described coil
The electromagnetic field in opposite direction with the electromagnetic field that described voice coil loudspeaker voice coil produces is produced during input current, described dynamic to reduce
The electromagnetic radiation of ring type earphone.
Moving coil earphone the most according to claim 1, it is characterised in that described coil and described sound
The direction of winding of circle is contrary, inputs the electric current identical with the described voice coil loudspeaker voice coil sense of current in described coil；
Or, described coil is identical with the direction of winding of described voice coil loudspeaker voice coil, input and described sound in described coil
The electric current that loop current is in opposite direction.
Moving coil earphone the most according to claim 2, it is characterised in that described coil is by described
Voice coil loudspeaker voice coil is connected to described circuit board, and receives the electric current of input with described voice coil loudspeaker voice coil serial or parallel connection；
Or, described coil is directly connected to described circuit board, receives the electricity of input from described circuit board
Stream.
Moving coil earphone the most according to claim 3, it is characterised in that according to the electricity of described voice coil loudspeaker voice coil
Coil described in magnetic field intensity around linear dimension and winding turns adjustable.
Moving coil earphone the most according to claim 1, it is characterised in that described coil and described loudspeaker
Monomer or assembling fixing with described housing, be arranged on front or the back side of described horn single body.
6. the method reducing moving coil earphone electromagnetic radiation, described moving coil earphone includes housing, loudspeaker
Monomer and circuit board, described horn single body is arranged in the cavity that described housing surrounds, including magnetic circuit system
System and the vibrational system being made up of vibrating diaphragm and voice coil loudspeaker voice coil；Described circuit board to described voice coil loudspeaker voice coil input tone currents time,
Described voice coil loudspeaker voice coil produces electromagnetic field, and moves up and down in described magnetic circuit system, drives described diaphragm oscillations to produce
Raw acoustical signal；It is characterized in that, described method includes:
The coil of one and described voice coil loudspeaker voice coil concentric coiling is set in described moving coil earphone, to described coil
Middle input current makes the electromagnetic field that it produces with described voice coil loudspeaker voice coil produces electromagnetic field is in opposite direction, to reduce
State the electromagnetic radiation of earphone.
Method the most according to claim 6, it is characterised in that make described coil and described voice coil loudspeaker voice coil
Direction of winding is contrary, inputs the electric current identical with the described voice coil loudspeaker voice coil sense of current in described coil；
Or making described coil identical with the direction of winding of described voice coil loudspeaker voice coil, in described coil, input is with described
The electric current that the voice coil loudspeaker voice coil sense of current is contrary.
Method the most according to claim 7, it is characterised in that by described coil by described voice coil loudspeaker voice coil
It is connected to described circuit board, and with described voice coil loudspeaker voice coil serial or parallel connection to receive the electric current of input；
Or, described coil is directly connected to the circuit board of described earphone, receives from described circuit board
The electric current of input.
Method the most according to claim 8, it is characterised in that according to the electromagnetic field intensity of described voice coil loudspeaker voice coil
Degree adjust described coil around linear dimension and winding turns.
Method the most according to claim 6, it is characterised in that described coil is arranged on loudspeaker
The front of monomer or the back side, and with horn single body or assembling fixing with earphone case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458945.7A CN105979420A (en) | 2016-06-22 | 2016-06-22 | Moving-coil type earphone and method for reducing electromagnetic radiation of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458945.7A CN105979420A (en) | 2016-06-22 | 2016-06-22 | Moving-coil type earphone and method for reducing electromagnetic radiation of the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105979420A true CN105979420A (en) | 2016-09-28 |
Family
ID=57021622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610458945.7A Pending CN105979420A (en) | 2016-06-22 | 2016-06-22 | Moving-coil type earphone and method for reducing electromagnetic radiation of the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105979420A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998199A (en) * | 2009-08-21 | 2011-03-30 | 固昌通讯股份有限公司 | Earphone |
| US8103014B2 (en) * | 2008-02-15 | 2012-01-24 | Siemens Aktiengesellschaft | Hearing protector for use in magnetic resonance systems |
| CN104105021A (en) * | 2013-04-03 | 2014-10-15 | 固昌通讯股份有限公司 | Earphone set |
| CN204993838U (en) * | 2015-09-30 | 2016-01-20 | 东莞市富新电子有限公司 | Outer magnetic -type loudspeaker of cell -phone demagnetization |
| CN205812318U (en) * | 2016-06-22 | 2016-12-14 | 青岛歌尔声学科技有限公司 | A kind of moving coil earphone |
-
2016
- 2016-06-22 CN CN201610458945.7A patent/CN105979420A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8103014B2 (en) * | 2008-02-15 | 2012-01-24 | Siemens Aktiengesellschaft | Hearing protector for use in magnetic resonance systems |
| CN101998199A (en) * | 2009-08-21 | 2011-03-30 | 固昌通讯股份有限公司 | Earphone |
| CN104105021A (en) * | 2013-04-03 | 2014-10-15 | 固昌通讯股份有限公司 | Earphone set |
| CN204993838U (en) * | 2015-09-30 | 2016-01-20 | 东莞市富新电子有限公司 | Outer magnetic -type loudspeaker of cell -phone demagnetization |
| CN205812318U (en) * | 2016-06-22 | 2016-12-14 | 青岛歌尔声学科技有限公司 | A kind of moving coil earphone |
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Application publication date: 20160928 |
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| RJ01 | Rejection of invention patent application after publication |