CN113676806B - Earphone and electronic equipment assembly - Google Patents
Earphone and electronic equipment assembly Download PDFInfo
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- CN113676806B CN113676806B CN202110898418.9A CN202110898418A CN113676806B CN 113676806 B CN113676806 B CN 113676806B CN 202110898418 A CN202110898418 A CN 202110898418A CN 113676806 B CN113676806 B CN 113676806B
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- 238000001514 detection method Methods 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 10
- 230000002441 reversible effect Effects 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims 4
- 210000000959 ear middle Anatomy 0.000 description 58
- 210000000613 ear canal Anatomy 0.000 description 22
- 210000003454 tympanic membrane Anatomy 0.000 description 17
- 230000008859 change Effects 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000000741 silica gel Substances 0.000 description 9
- 229910002027 silica gel Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 210000002388 eustachian tube Anatomy 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000009205 Tinnitus Diseases 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000886 tinnitus Toxicity 0.000 description 1
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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
Abstract
The application discloses an earphone and an electronic device assembly, wherein the earphone comprises: the device comprises a shell, a loudspeaker unit, an air pressure sensor and a driving assembly; the loudspeaker unit is arranged in the shell, the air pressure sensor is used for acquiring a first air pressure value and a second air pressure value at two sides of the vibrating diaphragm of the loudspeaker unit, and the driving assembly drives the loudspeaker unit to move under the condition that the first air pressure value and the second air pressure value are unequal, so that the first air pressure value and the second air pressure value are equal.
Description
Technical Field
The application belongs to the technical field of electronic products, and particularly relates to an earphone and an electronic equipment assembly.
Background
With the continuous development of electronic technology, the function of the earphone is continuously upgraded, and people have higher requirements on the tone quality and wearing comfort of the earphone. Headphones are used more and more frequently in life, both indoors and outdoors. In case of abrupt changes in the external air pressure, for example during take-off or landing of an aircraft, the air pressure in the ear canal does not change as much, resulting in physiological discomfort.
Disclosure of Invention
The application aims to provide an earphone and an electronic device assembly, which can solve the problem that eardrum deformation is easy to cause when external atmospheric pressure and air pressure in tympanic cavity of the middle ear change.
In order to solve the technical problems, the application is realized as follows:
In a first aspect, an embodiment of the present application provides an earphone, including: the device comprises a shell, a loudspeaker unit, an air pressure sensor and a driving assembly;
The loudspeaker unit is arranged in the shell, the air pressure sensor is used for acquiring a first air pressure value and a second air pressure value at two sides of the vibrating diaphragm of the loudspeaker unit, and the driving assembly drives the loudspeaker unit to move under the condition that the first air pressure value and the second air pressure value are unequal, so that the first air pressure value and the second air pressure value are equal.
According to the earphone provided by the embodiment of the application, the driving component drives the loudspeaker unit to move along the first direction under the condition that the first air pressure value is larger than the second air pressure value; the driving assembly drives the speaker unit to move in a second direction under the condition that the first air pressure value is smaller than the second air pressure value;
Wherein the first direction and the second direction are opposite directions.
According to the earphone provided by the embodiment of the application, the loudspeaker unit comprises a permanent magnet, and the driving assembly comprises a driving control circuit and a first coil;
one end of the permanent magnet is provided with a first groove matched with the first coil, the first coil is arranged in the first groove, and one end of the first coil, which is positioned outside the first groove, is fixed on the inner wall of the shell;
the drive control circuit is used for leading forward current to the first coil under the condition that the first air pressure value is larger than the second air pressure value; the drive control circuit is configured to apply a reverse current to the first coil when the first air pressure value is less than the second air pressure value.
According to the earphone provided by the embodiment of the application, the driving assembly further comprises a substrate, the substrate is arranged in the shell, and one end of the first coil, which is positioned outside the first groove, is fixed on the substrate.
According to the earphone provided by the embodiment of the application, the loudspeaker unit further comprises an elastic membrane, a second coil and a rotor;
The other end of the permanent magnet is provided with a second groove matched with the rotor, the rotor is arranged in the second groove, the second coil is wound on the rotor, the vibrating diaphragm is arranged at one end, away from the bottom of the second groove, of the rotor, and the vibrating diaphragm is connected with the inner wall of the shell through the elastic membrane.
According to the earphone provided by the embodiment of the application, the earphone further comprises a silica gel sleeve, the shell is provided with a sound emitting channel, the silica gel sleeve is arranged on the sound emitting channel, the silica gel sleeve is provided with sound emitting holes, and the vibrating diaphragm is connected with the silica gel sleeve through the elastic membrane.
According to the earphone provided by the embodiment of the application, the loudspeaker unit further comprises a distance sensor, the distance sensor is arranged at the other end of the permanent magnet, the detection end of the distance sensor faces the vibrating diaphragm, and the distance sensor is used for acquiring the distance between the vibrating diaphragm and the detection end of the distance sensor.
According to the earphone provided by the embodiment of the application, under the condition that two distance sensors are arranged, one distance sensor is positioned at the center of the permanent magnet, and the other distance sensor is positioned at the bottom edge of the permanent magnet.
According to the earphone provided by the embodiment of the application, the bottom wall of the shell is provided with the sliding groove, the sliding groove is matched with the loudspeaker unit, and the loudspeaker unit is slidably arranged in the sliding groove.
In a second aspect, an embodiment of the present application proposes an electronic device assembly, including: electronic equipment and the earphone.
In the embodiment of the application, when the external air pressure is greater than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the first air pressure value and the second air pressure value at the two sides of the vibrating diaphragm are unequal, and the loudspeaker unit moves under the drive of the driving component to reduce the volume in the auditory canal, so that the air pressure in the auditory canal is increased, and the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the external air pressure are the same; when the external air pressure is smaller than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the first air pressure value and the second air pressure value on the two sides of the vibrating diaphragm are unequal, the loudspeaker unit is driven by the driving assembly to move, the volume in the auditory canal is increased, and accordingly the air pressure in the auditory canal is reduced, the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the air pressure in the external atmosphere are the same, the air pressure in the auditory canal is adjusted in real time, discomfort of ears caused by the change of the external air pressure can be eliminated, and the experience of a user is improved.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is one of schematic structural diagrams of an earphone according to an embodiment of the present application;
FIG. 2 is a second schematic diagram of an earphone according to an embodiment of the present application;
FIG. 3 is a third schematic diagram of an earphone according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a headset according to an embodiment of the present application;
FIG. 5 is a fifth schematic diagram of a headset according to an embodiment of the present application;
FIG. 6 is a diagram showing a structure of an earphone according to an embodiment of the present application;
FIG. 7 is a diagram of a headset according to an embodiment of the present application;
FIG. 8 is a flow chart of a method of air pressure adjustment of a headset according to an embodiment of the application;
Reference numerals:
1: a housing; 2: a distance sensor;
3: a first coil; 4: an elastic film;
5: a silica gel sleeve; 6: a sound outlet hole;
7: a vibrating diaphragm; 8: a permanent magnet;
9: a drive control circuit; 10: a mover;
11: a substrate; 12: eardrum.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper and lower", "horizontal", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
Because the air pressure in the cabin can be changed in the aircraft flight process, when passengers face the scenes of air pressure changes from high air pressure to low air pressure, from low air pressure to high air pressure and the like in the cabin, the human body can adjust the air pressure in the middle ear drum through the eustachian tube, and the air pressure in the middle ear drum is kept the same as the external air pressure.
If the in-ear earphone is worn all the time in the process of taking off or landing of the airplane, the indoor air pressure of the eardrum keeps consistent with the outside through the eustachian tube, but because the tightness of the in-ear earphone is good, the air pressure in the ear canal is not changed, so that pressure difference is generated between the ear canal and the tympanic cavity of the middle ear as well as the outside environment, when the user does not perceive, the eardrum bears larger pressure for a long time, and the user can possibly generate untoward effects such as tinnitus and the like.
As shown in fig. 2 and 3, during the use of the in-ear earphone by the user, if the air pressure in the middle ear drum chamber, the air pressure in the ear canal, and the external atmospheric pressure are different, abnormal deformation of the eardrum 12 and the diaphragm 7 may be caused.
When the external air pressure and the air pressure in the tympanic cavity of the middle ear become large and the air pressure in the auditory canal does not change, the eardrum 12 and the vibrating diaphragm 7 deform as shown in fig. 2, and when the external air pressure and the air pressure in the tympanic cavity of the middle ear become small and the air pressure in the auditory canal does not change, the eardrum 12 and the vibrating diaphragm 7 deform as shown in fig. 3. The dashed line in fig. 2 and 3 is the position where the eardrum 12 and the diaphragm 7 are at the same pressure as the pressure in the tympanic cavity of the middle ear, the pressure in the auditory canal, and the external atmospheric pressure.
In order to solve the above problem, as shown in fig. 1, an earphone according to an embodiment of the present application includes: a housing 1, a speaker unit, an air pressure sensor and a driving assembly.
Wherein the loudspeaker unit comprises a diaphragm 7.
The loudspeaker unit is arranged in the shell 1 in a sliding manner, and the air pressure sensor is used for acquiring a first air pressure value and a second air pressure value on two sides of the vibrating diaphragm 7.
In the case where the first air pressure value and the second air pressure value are not equal, the speaker unit is moved by the driving of the driving assembly so that the first air pressure value and the second air pressure value are equal.
It should be noted that, in the case that the earphone is inserted into the ear canal, that is, when the user uses the earphone, the first air pressure value is the air pressure in the ear canal, and the second air pressure value is the air pressure in the earphone.
When the external air pressure and the air pressure in the tympanic cavity of the middle ear become large and the air pressure in the auditory canal is unchanged, the first air pressure value is smaller than the second air pressure value, and the first air pressure value needs to be increased at the moment; when the external air pressure and the air pressure in the tympanic cavity of the middle ear become smaller and the air pressure in the auditory canal is not changed, the first air pressure value is larger than the second air pressure value, and the first air pressure value needs to be adjusted.
In the embodiment of the application, when the external air pressure is greater than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the first air pressure value and the second air pressure value at the two sides of the vibrating diaphragm 7 are unequal, and the loudspeaker unit moves under the drive of the driving component to reduce the volume in the auditory canal, so that the air pressure in the auditory canal is increased, and the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the external air pressure are the same; when the external air pressure is smaller than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the first air pressure value and the second air pressure value on the two sides of the vibrating diaphragm 7 are unequal, the loudspeaker unit is driven by the driving assembly to move, the volume in the auditory canal is increased, and accordingly the air pressure in the auditory canal is reduced, the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the air pressure in the external atmosphere are the same, the air pressure in the auditory canal is adjusted in real time, discomfort of ears caused by the change of the external air pressure can be eliminated, and the experience of a user is improved.
In an alternative embodiment, the driving assembly drives the speaker unit to move in the first direction in case the first air pressure value is greater than the second air pressure value; under the condition that the first air pressure value is smaller than the second air pressure value, the driving assembly drives the loudspeaker unit to move along the second direction;
Wherein the first direction and the second direction are opposite directions.
It should be noted that, when the earphone is plugged into the ear canal, the speaker unit is driven by the driving component to move along the first direction under the condition that the first air pressure value is greater than the second air pressure value, that is, at this time, the diaphragm 7 moves towards the eardrum 12, so as to reduce the volume in the ear canal, thereby increasing the air pressure in the ear canal, so that the air pressure in the middle ear drum, the air pressure in the ear canal and the external atmospheric pressure are the same; in the case that the earphone is plugged into the ear canal, the speaker unit is moved in the second direction under the driving of the driving assembly under the condition that the first air pressure value is smaller than the second air pressure value, that is, at this time, the diaphragm 7 moves away from the eardrum 12, increasing the volume in the ear canal, and thus reducing the air pressure in the ear canal, so that the air pressure in the middle ear drum chamber, the air pressure in the ear canal, and the external atmospheric pressure are the same.
In an alternative embodiment the speaker unit further comprises a permanent magnet 8 and the drive assembly comprises a drive control circuit 9 and the first coil 3.
One end of the permanent magnet 8 is provided with a first groove matched with the first coil 3, the first coil 3 is arranged in the first groove, and one end of the first coil 3 positioned outside the first groove is fixed on the inner wall of the shell 1.
The drive control circuit 9 is used for supplying forward current to the first coil 3 when the first air pressure value is larger than the second air pressure value; in case the first air pressure value is smaller than the second air pressure value, the drive control circuit 9 is adapted to apply a reverse current to the first coil 3.
Wherein, permanent magnet 8 slides and locates in casing 1, and permanent magnet 8 can be bowl-shaped.
When the earphone is plugged into the auditory canal and the first air pressure value is larger than the second air pressure value, the driving control circuit 9 is used for supplying forward current to the first coil 3 so as to drive the permanent magnet 8 to linearly move towards the direction away from the first coil 3;
In case that the earphone is inserted into the auditory canal, the driving control circuit 9 is used for supplying reverse current to the first coil 3 to drive the permanent magnet 8 to linearly move towards the direction approaching the first coil 3 under the condition that the first air pressure value is smaller than the second air pressure value.
By applying a corresponding direct current to the first coil 3, the first coil 3 receives a force according to ampere's law, and the permanent magnet 8 moves accordingly due to a reaction force since the first coil 3 is fixed to the inner wall of the housing 1 and cannot move.
The drive control circuit 9 is configured to provide the first coil 3 with a dc power supply, and the drive control circuit 9 may provide the dc power supply with a variable magnitude and a variable direction according to ampere's law: f=bil, the permanent magnet 8 can move under the action of a reaction force, wherein B is the magnetic field intensity provided by the permanent magnet 8 in the air gap, I is the current provided by the drive control circuit to the first coil 3, and L is the equivalent length of the first coil 3 in the magnetic field.
The driving control circuit 9 may be a MOS transistor driving module, a buck-boost DCDC converting circuit, and an H-bridge circuit formed by four MOS transistors, where the first MOS transistor and the second MOS transistor are PMOS, the third MOS transistor and the fourth MOS transistor are NMOS, and the driving control circuit may provide a dc power supply with variable size and direction for the first coil 3.
The BUCK-BOOST DCDC conversion circuit can BOOST or BUCK the battery voltage or other constant voltage, and the size of the constant voltage provided by the outside is E, the BUCK-BOOST circuit can be used as an internal circuit of the BUCK-BOOST DCDC conversion circuit, and the output voltage of the BUCK-BOOST DCDC conversion circuit can be expressed as:
U1＝(E×D)/(1-D)
Wherein D is the duty cycle of the switch Q;
the first MOS tube and the fourth MOS tube are opened, forward current can be provided for the first coil 3, the permanent magnet 8 can linearly move along the direction away from the first coil 3 under the action of the reaction force, and the vibrating diaphragm 7 moves along with the forward current until the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the external atmospheric pressure are the same.
The second MOS tube and the third MOS tube are opened, negative current can be provided for the first coil 3, the permanent magnet 8 can linearly move along the direction close to the first coil 3 under the action of the reaction force, and the vibrating diaphragm 7 moves along with the negative current until the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the external atmospheric pressure are the same.
In the embodiment of the application, the moving direction of the vibrating diaphragm 7 can be adjusted in real time according to actual conditions, so that the size of the auditory canal space between the eardrum 12 and the vibrating diaphragm 7 is changed, and the change of the air pressure in the auditory canal is realized.
In an alternative embodiment, the drive control circuit 9 is further configured to output the target current to the first coil 3 according to a magnitude of a difference between the first air pressure value and the second air pressure value.
In the embodiment of the application, the ampere force is changed by adjusting the magnitude of the output current, and the permanent magnet 8 can be moved to the target position under the action of the reaction force under the condition of the target reaction force and the target time.
In an alternative embodiment, a base plate 11 is provided on the inner wall of the housing 1, and the end of the first coil 3 located outside the first recess is fixed to the base plate 11.
That is, the first coil 3 is stationary relative to the housing 1, and there is relative movement between the first coil 3 and the permanent magnet 8.
In an alternative embodiment, the speaker unit further comprises an elastic membrane 4, a second coil and a mover 10.
The other end of the permanent magnet 8 is provided with a second groove matched with the rotor 10, the rotor 10 is arranged in the second groove, the second coil is wound on the rotor 10, the vibrating diaphragm 7 is arranged at one end of the rotor 10 away from the bottom of the second groove, and the vibrating diaphragm 7 is connected with the inner wall of the shell 1 through the elastic membrane 4.
Wherein, in order to ensure that the air pressure between the eardrum 12 and the diaphragm 7 does not leak, the diaphragm 7 is connected with the inner wall of the housing 1 through the elastic membrane 4.
One end of the permanent magnet 8 is provided with a first groove matched with the rotor 10, the rotor 10 is slidably arranged in the first groove, and the vibrating diaphragm 7 is arranged at one end of the rotor 10 away from the bottom of the first groove. That is, the diaphragm 7 can move synchronously with the mover 10.
The earphone further comprises an internal circuit unit, wherein the second coil is wound around the mover 10, and under the normal working condition of the earphone, the permanent magnet 8 is in a static state at the moment, the internal circuit unit generates an electric signal and transmits the electric signal to the second coil wound around the mover 10 through a wire, and the diaphragm 7 can move along with the mover 10 according to ampere law because the second coil is in a magnetic field established by the permanent magnet 8, that is, under the normal working condition of the diaphragm 7, the mover 10 moves in the first groove close to the bottom of the first groove, or the mover 10 moves in the first groove far away from the bottom of the first groove.
In an alternative embodiment, in order to facilitate plugging the earphone into the auditory canal, the earphone further comprises a silica gel sleeve 5, the shell 1 is provided with an acoustic channel, the acoustic channel is provided with the silica gel sleeve 5, the silica gel sleeve 5 is provided with an acoustic hole 6, and the vibrating diaphragm 7 is connected with the silica gel sleeve 5 through the elastic membrane 4.
In an alternative embodiment, in order to further solve the problem of abnormal deformation of the eardrum 12 and the diaphragm 7, the speaker unit further comprises a distance sensor 2, the distance sensor 2 is arranged at the other end of the permanent magnet 8, the detection end of the distance sensor 2 faces the diaphragm 7, and the distance sensor 2 is used for acquiring the distance between the diaphragm 7 and the detection end of the distance sensor 2.
When the air pressures at two sides of the diaphragm 7 are different, the diaphragm 7 can deform abnormally, and the offset of the diaphragm 7 is the difference between the distance between the diaphragm deformation state and the detection end of the distance sensor and the distance between the diaphragm 7 in the normal state and the detection end of the distance sensor.
In the embodiment of the application, when the external air pressure is greater than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the offset of the vibrating diaphragm 7 is greater than zero, the driving control circuit 9 is used for leading forward current to the first coil 3 so as to drive the permanent magnet 8 to linearly move towards the direction far away from the first coil 3, and the volume of the air in the auditory canal is reduced, so that the air pressure in the auditory canal is increased, and the air pressure in the tympanic cavity, the air pressure in the auditory canal and the external atmospheric pressure are the same; when the external air pressure is smaller than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the offset of the vibrating diaphragm 7 is smaller than zero, the driving control circuit 9 is used for leading the first coil 3 to be reversely current so as to drive the permanent magnet 8 to linearly move towards the direction close to the first coil 3, the volume of air in the auditory canal is increased, and the air pressure in the auditory canal is reduced, so that the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the air pressure in the external atmosphere are the same, the air pressure in the auditory canal is adjusted in real time, discomfort of ears caused by the change of the external air pressure can be eliminated, and the experience of a user is improved.
Wherein, the permanent magnet 8 can drive the mover 10 and the diaphragm 7 to move together while moving along the first direction or the second direction. That is, when the permanent magnet 8 moves in the first direction, the mover 10 and the diaphragm 7 also move in the first direction, and when the permanent magnet 8 moves in the second direction, the mover 10 and the diaphragm 7 also move in the second direction.
In an alternative embodiment, the distance sensor 2 is arranged between the permanent magnet 8 and the diaphragm 7, the distance sensor 2 is fixed at one end of the permanent magnet 8, the detection end of the distance sensor 2 faces the diaphragm 7, and the diaphragm 7 has an initial position, a first position and a second position.
The distance sensor 2 is an infrared distance sensor, an ultrasonic sensor, or a SAR sensor, and is not particularly limited herein.
When the external air pressure is greater than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the vibrating diaphragm 7 is in the first position, when the external air pressure is smaller than the air pressure in the tympanic cavity of the middle ear and the air pressure in the auditory canal is unchanged, the vibrating diaphragm 7 is in the second position, and when the air pressure in the tympanic cavity of the middle ear, the air pressure in the auditory canal and the external atmospheric pressure are the same. Wherein the initial position is located between the first position and the second position.
The distance sensor 2 is configured to obtain a first distance between the diaphragm 7 and a detection end of the distance sensor 2 in a case where the diaphragm 7 is in the first position; the distance sensor 2 is configured to obtain a second distance between the diaphragm 7 and a detection end of the distance sensor 2 in a case where the diaphragm 7 is in the second position; the distance sensor 2 is used to obtain a third distance between the diaphragm 7 and the detection end of the distance sensor 2 with the diaphragm 7 in the initial position.
When the first distance is greater than the third distance, the offset is the difference between the first distance and the third distance, the offset is a positive number, and the drive control circuit 9 is configured to apply a forward current to the first coil 3. When the second distance is smaller than the third distance, the offset is the difference between the second distance and the third distance, the offset is negative, and the drive control circuit 9 is configured to apply a reverse current to the first coil 3.
For example, when the first distance is 5mm, the second distance is 2mm, the third distance is 4mm, and the offset is 5mm-4 mm=1 mm, the drive control circuit 9 is configured to apply a forward current to the first coil 3; when the offset is 2mm-4 mm= -2mm, the drive control circuit 9 is used to apply a reverse current to the first coil 3.
In an alternative embodiment, as shown in fig. 4, in the case where the number of the distance sensors 2 is one, the distance sensor 2 is located at the center of the permanent magnet 8, the distance between the diaphragm 7 and the detection end of the distance sensor 2 is defined as S when the air pressure in the ear canal is the same as the external air pressure, the distance between the diaphragm 7 and the detection end of the distance sensor 2 is defined as S 'when the diaphragm 7 protrudes toward the inner layer of the ear canal or is recessed toward the outer side of the ear canal, the diaphragm offset is defined as Δs, Δs=s' -S, when Δs is greater than 0, it is determined that the air pressure in the ear canal needs to be increased, and when Δs is less than 0, it is determined that the air pressure in the ear canal needs to be decreased.
As shown in fig. 8, when the distance sensor 2 detects that the offset Δs of the diaphragm 7 is greater than a preset threshold Δs, the relationship between the distance S ' and S between the diaphragm 7 and the distance sensor 2 is determined, and when S ' > S, positive direct current is supplied to the first coil 3, and when S ' < S, negative direct current is supplied to the first coil 3, and at the same time, the offset Δs of the diaphragm 7 is cyclically detected at a certain time step t, and the magnitude of the supplied direct current is corrected by an automatic control strategy including PID but not limited to Δs.
In an alternative embodiment, in order to accurately detect the deformation of the sounding diaphragm 7, the relationship of the air pressure in the ear canal with respect to the outside world and the tympanic cavity is determined so as to know whether the air pressure in the ear canal should be increased or decreased.
The number of the distance sensors 2 is two, namely a first distance sensor and a second distance sensor, wherein the first distance sensor is positioned at the center of the permanent magnet 8, and the second distance sensor is positioned at the bottom edge of the permanent magnet 8.
The arrangement positions of the first distance sensor and the second distance sensor are defined below.
In the case of the diaphragm 7 in the first position, the two first distances acquired by the first distance sensor and the second distance sensor are not equal; in the case of the diaphragm 7 in the second position, the two second distances acquired by the first distance sensor and the second distance sensor are not equal; with the diaphragm 7 in the initial position, the two third distances acquired by the first and second distance sensors are equal. That is, the first distance sensor and the second distance sensor are arranged up and down rather than horizontally.
When the air pressures at two sides of the diaphragm 7 are the same, the position where the diaphragm 7 is located is defined as an initial position, no abnormal deformation occurs to the diaphragm 7, and the distances between the first distance sensor and the diaphragm 7 and the distance between the second distance sensor and the diaphragm 7 are the same, which are both S.
When the air pressures at the two sides of the diaphragm 7 are different, the diaphragm 7 is deformed abnormally, and the distances between the first distance sensor and the diaphragm 7 are different, wherein the distance between the first distance sensor and the diaphragm 7 is defined as S 1, the distance between the second distance sensor and the diaphragm 7 is defined as S 2, Δs=s 1-S2 is defined, the magnitude of the air pressure difference can be indirectly judged by judging the magnitude of Δs, and the magnitude of the output voltage of the step-up/step-down DCDC conversion circuit depends on the magnitude of Δs.
The air pressure relationship at the two sides of the diaphragm 7 can be indirectly judged by judging the positive and negative of S 1 -S.
As shown in fig. 5, 6 and 7, when the external air pressure and the air pressure in the tympanic cavity of the middle ear become larger and the air pressure in the ear canal does not change, the eardrum 12 and the diaphragm 7 deform as shown in fig. 2, at this time Δs > 0, S1 > S2 > S, and by applying a forward direct current to the first coil 3, the permanent magnet 8 can move in the first direction, and the diaphragm 7 moves accordingly; when the external air pressure and the air pressure in the tympanic cavity of the middle ear become smaller and the air pressure in the auditory canal does not change, the eardrum 12 and the vibrating diaphragm 7 deform as shown in figure 3, at the moment, deltaS < 0,S > S2 > S1, and the permanent magnet 8 can move along the second direction by leading the first coil 3 to be negative direct current, so that the vibrating diaphragm 7 moves along with the permanent magnet; when the pressure in the middle ear drum chamber, the pressure in the auditory canal and the external atmospheric pressure are the same, the first coil 3 is not electrified with direct current.
In the embodiment of the application, the size of the space of the auditory canal between the eardrum 12 and the vibrating diaphragm 7 can be changed by moving the vibrating diaphragm 7 relative to the shell 1, so that the change of the air pressure in the auditory canal is realized, and the uncomfortable feeling of a user caused by unequal air pressure in the eardrum and the auditory canal is avoided; by changing the direction of the direct current on the first coil 3, the direction of the magnetic field is changed, and the moving direction of the permanent magnet 8 can be changed, so that air pressure balance can be realized under different air pressure conditions.
In an alternative embodiment, in order to facilitate the movement of the permanent magnet 8 in the first direction or the second direction, a sliding groove may be provided on the inner wall of the housing 1, and both the top and bottom of the permanent magnet 8 are located in the sliding groove, thereby ensuring the accuracy of the movement of the permanent magnet 8.
In addition, in other embodiments of the present application, there is also provided an electronic device assembly including: electronic equipment and the earphone.
The electronic equipment comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer and the like. The embodiment of the application does not limit the specific type of the electronic equipment.
In the description of the present specification, reference to the terms "alternative implementations," "other embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An earphone, comprising: the device comprises a shell, a loudspeaker unit, an air pressure sensor and a driving assembly;
The loudspeaker unit is arranged in the shell, the air pressure sensor is used for acquiring a first air pressure value and a second air pressure value at two sides of the vibrating diaphragm of the loudspeaker unit, and the driving assembly drives the loudspeaker unit to move under the condition that the first air pressure value and the second air pressure value are unequal, so that the first air pressure value and the second air pressure value are equal;
The speaker unit includes a permanent magnet, and the driving assembly includes a driving control circuit and a first coil; one end of the permanent magnet is provided with a first groove matched with the first coil, the first coil is arranged in the first groove, and one end of the first coil, which is positioned outside the first groove, is fixed on the inner wall of the shell.
2. The earphone of claim 1, wherein the drive assembly drives the speaker unit to move in a first direction if the first air pressure value is greater than the second air pressure value; the driving assembly drives the speaker unit to move in a second direction under the condition that the first air pressure value is smaller than the second air pressure value;
Wherein the first direction and the second direction are opposite directions.
3. The earphone of claim 2, wherein the drive control circuit is configured to pass a forward current to the first coil if the first air pressure value is greater than the second air pressure value; the drive control circuit is configured to apply a reverse current to the first coil when the first air pressure value is less than the second air pressure value.
4. The earphone of claim 3, wherein the driving assembly further comprises a base plate disposed in the housing, and wherein an end of the first coil located outside the first recess is fixed to the base plate.
5. A headset according to claim 3, wherein the speaker unit further comprises an elastic membrane, a second coil and a mover;
The other end of the permanent magnet is provided with a second groove matched with the rotor, the rotor is arranged in the second groove, the second coil is wound on the rotor, the vibrating diaphragm is arranged at one end, away from the bottom of the second groove, of the rotor, and the vibrating diaphragm is connected with the inner wall of the shell through the elastic membrane.
6. The earphone of claim 5, further comprising a silicone sleeve, wherein the housing has a sound emitting channel, the sound emitting channel is provided with the silicone sleeve, the silicone sleeve is provided with a sound emitting hole, and the diaphragm is connected with the silicone sleeve through the elastic membrane.
7. A headset as claimed in claim 3, wherein the speaker unit further comprises a distance sensor provided at the other end of the permanent magnet, a detection end of the distance sensor being directed toward the diaphragm, the distance sensor being for acquiring a distance between the diaphragm and the detection end of the distance sensor.
8. The earphone of claim 7, wherein in the case where there are two of the distance sensors, one of the distance sensors is located at the center of the permanent magnet and the other of the distance sensors is located at the bottom edge of the permanent magnet.
9. The earphone of claim 1, wherein the bottom wall of the housing is provided with a sliding groove, the sliding groove is adapted to the speaker unit, and the speaker unit is slidably disposed in the sliding groove.
10. An electronic device assembly, comprising: electronic device and earphone according to any of claims 1 to 9.
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| CN202110898418.9A CN113676806B (en) | 2021-08-05 | 2021-08-05 | Earphone and electronic equipment assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110898418.9A CN113676806B (en) | 2021-08-05 | 2021-08-05 | Earphone and electronic equipment assembly |
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| CN113676806B true CN113676806B (en) | 2024-04-19 |
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| CN114311617A (en) * | 2021-12-21 | 2022-04-12 | 昆山联滔电子有限公司 | Coil assembly, manufacturing method and manufacturing equipment thereof, and earphone device |
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