CN116805994A - Earphone and electronic equipment - Google Patents

Earphone and electronic equipment Download PDF

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Publication number
CN116805994A
CN116805994A CN202210262397.6A CN202210262397A CN116805994A CN 116805994 A CN116805994 A CN 116805994A CN 202210262397 A CN202210262397 A CN 202210262397A CN 116805994 A CN116805994 A CN 116805994A
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CN
China
Prior art keywords
earphone
sound
unit
circuit structure
generating unit
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Pending
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CN202210262397.6A
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Chinese (zh)
Inventor
郭李
徐昌荣
贾锋超
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202210262397.6A priority Critical patent/CN116805994A/en
Publication of CN116805994A publication Critical patent/CN116805994A/en
Pending legal-status Critical Current

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Abstract

The embodiment of the application provides an earphone and electronic equipment. The earphone comprises an earphone shell, a basin frame, a first sound generating unit and a second sound generating unit, wherein the moving coil loudspeaker is used as the first sound generating unit, and the earphone has higher low-frequency lower potential capability. The second sound producing unit is arranged on one side of the magnetic circuit structure of the first sound producing unit or the periphery of the basin frame and has the capability of outputting high-frequency sound. Because the first sound generating unit and the second sound generating unit can respectively output sounds with different frequencies, the earphone can simultaneously meet the requirements of high and low sounds, and the high-frequency extension and low-frequency diving performance are improved. Compared with the traditional earphone which adopts the axial stacking of the high-pitch unit and the low-pitch unit, the second sound producing unit in the earphone is positioned at one side of the magnetic circuit structure or the periphery of the basin frame, so that the axial size of the earphone is smaller, the overall thickness of the earphone is close to that of the single-action ring unit, and the space utilization rate is improved. The electronic equipment with the earphone also meets the requirements of high and low sound, and the occupied space of the earphone is small.

Description

Earphone and electronic equipment
Technical Field
The embodiment of the application relates to the technical field of earphones, in particular to an earphone and electronic equipment.
Background
The sound effect is the basic requirement of the earphone, and the requirement of the user on the sound effect of the earphone is increasingly improved, so that the earphone is required to have wider high-frequency extension and better low-frequency diving. The traditional earphone adopts single loudspeaker unit, is difficult to satisfy high, the equal high-quality design of bass simultaneously, and output tone quality is poor. Based on this, earphone schemes of a combination of a high-pitch unit and a low-pitch unit are developed in the industry, and the high-pitch unit and the low-pitch unit adopt independent vibration systems, so that high-quality design is realized for high-pitch and low-pitch respectively. The existing earphone adopting the combination of the high-pitch unit and the low-pitch unit has the defects that the two units are axially stacked, the axial size is large, and the requirement of shortage of the internal space of the earphone is difficult to meet. There is a need in the industry for a headset with a small footprint and good high and low frequency sound quality.
Disclosure of Invention
The embodiment of the application provides an earphone and electronic equipment, which solve the problem that the earphone which occupies small space and has good high-low frequency tone quality is difficult to provide.
In order to achieve the above purpose, the embodiment of the application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides an earphone, which includes an earphone shell, a basin stand, a first sound emitting unit and a second sound emitting unit; the basin is arranged on the earphone shell; the first sound generating unit comprises a magnetic circuit structure arranged on the basin frame, a vibrating diaphragm and a voice coil connected with the vibrating diaphragm, wherein the magnetic circuit structure is provided with an annular air gap, the vibrating diaphragm is spaced from the magnetic circuit structure, at least one part of the voice coil is accommodated in the annular air gap, and a bass vibration sound source surface is formed at the joint between the voice coil and the vibrating diaphragm; the second pronunciation unit is installed in the magnetic circuit structure and faces one side of vibrating diaphragm or the periphery of basin frame, and the second pronunciation unit has the high pitch vibration sound source face, and the orientation of high pitch vibration sound source face and bass vibration sound source face is the same.
The earphone provided by the embodiment of the application takes the moving coil loudspeaker as the first sound emitting unit, and has higher low-frequency lower potential capability. The second sound producing unit is arranged on one side of the magnetic circuit structure of the first sound producing unit or the periphery of the basin frame and has the capability of outputting high-frequency sound. Because the first sound generating unit and the second sound generating unit can respectively output sounds with different frequencies, the earphone can simultaneously meet the requirements of high and low sounds, and the high-frequency extension and low-frequency diving performance are improved. Compared with the traditional earphone which adopts the axial stacking of the high-pitch unit and the low-pitch unit, the second sound producing unit in the earphone is positioned at one side of the magnetic circuit structure or the periphery of the basin frame, so that the axial size of the earphone is smaller, the overall thickness of the earphone is close to that of the single-action ring unit, and the space utilization rate is improved.
In one possible embodiment, the earphone shell is provided with an ear cover, the ear cover and the earphone shell enclose a front cavity, and the first sound generating unit and the second sound generating unit are both arranged towards the front cavity. The earmuff can reduce external noise and also provide comfort and tightness when wearing the earphone. The sound waves generated by the first sound generating unit and the second sound generating unit pass through the front cavity enclosed by the earmuffs and the earphone shells and then enter the auditory canal of the person.
In one possible embodiment, the second sound producing unit is provided with a horn, the horn is located in the front cavity, the horn has a first end and a second end which are oppositely arranged, the peripheries of the first end and the second sound producing unit are aligned, and the second end is arranged towards the sound producing direction of the second sound producing unit. After the horn is arranged, the propagation direction of the sound wave generated by the second sound generating unit is concentrated, so that the high-frequency sensitivity and the effective bandwidth of the second sound generating unit can be improved, and a good high-frequency sound quality effect is realized.
In one possible embodiment, a grill frame is provided on the earphone housing, the grill frame is covered on the diaphragm, and the grill frame has a plurality of sound outlet holes for the sound of the first sound emitting unit. The sound that first sound unit produced is guided through the grid frame, is exported by a plurality of play sound holes, realizes that the play sound equilibrium of earphone promotes.
In one possible embodiment, the horn and the grille frame are of an integral structure, the second end of the horn is connected with the grille frame, the first end of the horn is fixed or abutted against the periphery of the second sound generating unit, and the edge of the grille frame is connected to the earphone shell. The horn and the grille frame are arranged into an integral structure, and the integral structure is easy to form and assemble.
In one possible embodiment, the earphone shell comprises an annular partition plate and a first rear shell, the front side surface of the annular partition plate and the bass vibration sound source surface face are the same, and the basin frame is arranged at the inner hole of the annular partition plate. The first back shell is connected to the back side of the annular partition board, the first back shell cover is arranged at the back of the first sound emitting unit, and the inner side of the first back shell, the back side of the annular partition board and the back side of the first sound emitting unit enclose a first back cavity. The first rear housing has a first resonant passage in communication with the first rear cavity. The basin stand is provided with ventilation holes and/or the magnetic circuit structure is provided with ventilation holes, and the annular air gap is communicated with the first rear cavity through the ventilation holes. The annular air gap in the first sound generating unit is communicated with the first rear cavity through the air holes, so that air can flow between the annular air gap and the first rear cavity to form a Helmholtz resonator. The frequency response of the earphone at the middle and low frequency points is reduced, the low frequency sensitivity is reduced, the flatness of the middle and low frequency response curve is improved, and the middle frequency or low frequency tone quality of the earphone is improved.
In one possible implementation manner, the earphone shell further comprises a second rear shell, the second rear shell is connected to the rear side surface of the annular partition plate, the inner side surface of the second rear shell, the rear side surface of the annular partition plate and the outer side surface of the first rear shell enclose a second rear cavity, and the first rear cavity and the second rear cavity are communicated through the first resonant channel; the annular partition plate is provided with a through hole communicated with the front cavity and the second rear cavity. The earphone of this embodiment adopts two back chambeies designs, and first back chamber and second back chamber are through first resonant channel intercommunication for the air can flow between first back chamber and second back chamber, and preceding chamber and second back chamber are through the via hole intercommunication in addition, make the air can flow between preceding chamber and second back chamber, form helmholtz resonator. The frequency response of the earphone at the other middle and low frequency points can be reduced, the low frequency sensitivity is improved, the flatness of the middle and low frequency response curve is improved, and the middle frequency or low frequency tone quality of the earphone is improved.
In one possible embodiment, the second rear housing has one or more second resonance channels communicating the second rear cavity with the external space. The second resonant channel is combined with the air volume in the second rear cavity and is used as a part of the resonator, so that the frequency response of the resonator at higher, middle and low frequency points is reduced, the flatness of a middle and low frequency response curve is improved, and the middle and low frequency tone quality of the earphone is further improved.
In one possible embodiment, the volume of the second rear chamber ranges from 4 cubic centimeters (cm) 3 ) To 16cm 3 . The low-frequency noise reduction device can reduce the frequency response of the earphone at a low-frequency point below 1kHz, reduce the low-frequency sensitivity, improve the flatness of a low-frequency response curve, meet the requirement of passive noise reduction on external space noise, improve the low-frequency tone quality of the earphone, and facilitate the forming of a second backshell with a second resonant channel.
In one possible embodiment, the length of the second resonant channel ranges from 4 millimeters (mm) to 20mm. The low-frequency noise reduction device can reduce the frequency response of the earphone at a low-frequency point below 1kHz, reduce the low-frequency sensitivity, improve the flatness of a low-frequency response curve, meet the requirement of passive noise reduction on external space noise, improve the low-frequency tone quality of the earphone, and facilitate the forming of a second backshell with a second resonant channel.
In one possible embodiment, the cross-sectional area of the second resonant passage ranges from 3 square millimeters (mm) 2 ) To 10mm 2 . The low-frequency noise reduction device can reduce the frequency response of the earphone at a low-frequency point below 1kHz, reduce the low-frequency sensitivity, improve the flatness of a low-frequency response curve, meet the requirement of passive noise reduction on external space noise, improve the low-frequency tone quality of the earphone, and facilitate the forming of a second backshell with a second resonant channel.
In one possible embodiment, the second rear housing has a main channel and a plurality of sub-channels, the main channel has two ends that are disposed opposite to each other, one end of the main channel is communicated with the second rear cavity, the other end of the main channel is communicated with the plurality of sub-channels, one ends of the plurality of sub-channels, which are far away from the main channel, are respectively connected to the second rear housing and are communicated with the external space, and the main channel and each sub-channel are respectively communicated to form a second resonance channel. More resonant channels are arranged in a smaller space, so that the frequency response of different middle and low frequency points is improved, and the compact structure of the rear cavity of the earphone is met.
In one possible embodiment, the second sound generating unit is provided as one, the second sound generating unit is mounted in the middle of one side of the magnetic circuit structure facing the diaphragm, and the second sound generating unit is coaxially provided with the first sound generating unit. The high-low sound double-unit frequency division is realized under the condition that the whole size of the low sound unit is not changed.
In one possible embodiment, the second sound generating unit is arranged in one piece, the second sound generating unit is arranged on the side of the magnetic circuit structure facing the diaphragm, and the second sound generating unit is arranged eccentrically to the first sound generating unit. The high-low sound double-unit frequency division is realized under the condition that the whole size of the low sound unit is not changed.
In one possible embodiment, the second sounding units are provided in plurality, and the plurality of second sounding units are provided around the outer circumference of the tub. The output sound has good space sense and realizes stereo effect. The whole structure is smaller in the axial direction or the radial direction, and the requirement of compact structure of the earphone is met.
In one possible embodiment, the magnetic circuit structure includes a magnetically permeable base, a magnet, and a magnetically permeable plate. The magnetic conduction seat comprises a plate-shaped part and a cylindrical part connected to the outer edge of the plate-shaped part. The magnet is installed on the plate-shaped part, the magnetic conduction plate is installed on the magnet, the outer peripheral surface of the magnet and the outer peripheral surface of the magnetic conduction plate are both spaced from the inner wall of the cylindrical part to form an annular air gap, and one end of the annular air gap, which is close to the magnetic conduction plate, forms an opening for the voice coil to extend in. The magnetic circuit structure can generate magnetic force lines passing through the annular air gap, and is called a first magnetic field. When the audio current passes through the voice coil, a second magnetic field is generated, and the second magnetic field of the voice coil interacts with the first magnetic field of the magnetic circuit structure, so that the voice coil vibrates to drive the vibrating diaphragm to vibrate.
In one possible embodiment, the magnetic circuit structure includes a magnetically permeable base, a ring magnet, and a magnetically permeable ring. The magnetic conduction seat comprises a plate-shaped part and a columnar part connected to the middle part of the plate-shaped part. The annular magnet is arranged on the plate-shaped part, the magnetic conduction ring is arranged on the annular magnet, the inner peripheral surface of the annular magnet and the inner peripheral surface of the magnetic conduction ring are both spaced from the outer peripheral surface of the columnar part to form an annular air gap, and one end of the annular air gap, which is close to the magnetic conduction ring, forms an opening into which the voice coil stretches. The magnetic circuit structure can generate magnetic force lines passing through the annular air gap, and is called a first magnetic field. When the audio current passes through the voice coil, a second magnetic field is generated, and the second magnetic field of the voice coil interacts with the first magnetic field of the magnetic circuit structure, so that the voice coil vibrates to drive the vibrating diaphragm to vibrate.
In one possible embodiment, the magnetic circuit structure includes a magnetically permeable base, an inner ring magnet, an outer ring magnet, an inner ring magnetically permeable plate, and an outer ring magnetically permeable plate. The inner ring magnet and the outer ring magnet are coaxially arranged on the magnetic conduction seat at intervals, the inner ring magnetic conduction plates and the outer ring magnetic conduction plates are arranged on the inner ring magnet and the outer ring magnet in a one-to-one correspondence manner, the inner ring magnetic conduction plates and the outer ring magnetic conduction plates are spaced, an annular air gap is formed between an assembly formed by the inner ring magnet and the inner ring magnetic conduction plates and an assembly formed by the inner ring magnet and the inner ring magnetic conduction plates, and an opening for the voice coil to extend in is formed at one end of the annular air gap, which is close to the inner ring magnetic conduction plates. The magnetic circuit structure can generate magnetic force lines passing through the annular air gap, and is called a first magnetic field. When the audio current passes through the voice coil, a second magnetic field is generated, and the second magnetic field of the voice coil interacts with the first magnetic field of the magnetic circuit structure, so that the voice coil vibrates to drive the vibrating diaphragm to vibrate.
In one possible embodiment, the earphone further comprises an elastic suspension for elastically supporting the voice coil and the diaphragm on the frame. The voice coil and the vibrating diaphragm are elastically supported on the basin frame by adopting the elastic suspension, so that the voice coil and the vibrating diaphragm vibrate within a preset range, the condition of swinging polarization is reduced, and the reliability is improved.
In one possible embodiment, the elastic suspension includes an inner ring portion, an intermediate ring portion, and an outer ring portion coaxially disposed, a first suspension arm connected between the inner ring portion and the intermediate ring portion, and a second suspension arm connected between the intermediate ring portion and the outer ring portion, the first suspension arm and the second suspension arm being suspended. When the voice coil is vibrated up and down in the annular air gap, the middle ring part and the connecting part of the vibrating diaphragm and the middle ring part follow the vibration, and the first cantilever and the second cantilever drag at the inner side and the outer side of the middle ring part, so that the voice coil and the vibrating diaphragm are guided to vibrate in a preset range.
In a possible embodiment, the elastic suspension is provided as a flexible circuit board for supplying audio current to the voice coil and the second sound unit. The outer ring part is provided with an input terminal, the voice coil is electrically connected with the middle ring part, and the second sound producing unit is electrically connected with the inner ring part. And the voice coil and the second sound producing unit do not need to be manually led, so that the assembly efficiency and the reliability are improved.
In one possible embodiment, the second sound generating unit is a microelectromechanical horn, a piezoelectric ceramic sound generating sheet, an electrostatic horn, or a flat plate horn. The second sound generating unit and the first sound generating unit are integrated, the sound effect is improved, and the occupation of the loudspeaker to the space is reduced.
In one possible embodiment, the basin stand has a through hole, in which the magnetic circuit structure is at least partially fitted; the inner wall of the through hole is provided with a blocking arm, the magnetic circuit structure is provided with a limiting groove, and the blocking arm is clamped and matched with the limiting groove to limit the position of the magnetic circuit structure relative to the basin frame. Axial and circumferential positioning of the magnetic circuit structure is realized.
In a second aspect, an embodiment of the present application provides an electronic device, including the above-mentioned earphone.
Drawings
Fig. 1 is a schematic structural diagram of an earphone according to an embodiment of the present application;
FIG. 2 is an exploded perspective view of the earphone portion structure of FIG. 1;
FIG. 3 is a perspective cross-sectional view of the earphone portion structure of FIG. 1;
fig. 4 is an enlarged view of a portion of the earphone structure of fig. 1;
FIG. 5 is a plot of the frequency response of the earphone after synthesis with the first sound emitting unit, the second sound emitting unit and the simulated ear test;
FIG. 6 is a schematic diagram of a frequency response curve of an earphone;
fig. 7 is a plot of the frequency response of an earphone when using the shadow mask free field test.
Fig. 8 is a schematic structural diagram of an earphone according to another embodiment of the present application;
fig. 9 is a schematic structural diagram of an earphone according to another embodiment of the present application;
fig. 10 is a schematic structural diagram of a plurality of second resonant channels and a second rear housing in an earphone according to another embodiment of the present application;
Fig. 11 is a schematic structural diagram of an earphone according to another embodiment of the present application;
FIG. 12 is a top view of the earphone portion structure of FIG. 11;
FIG. 13 is a schematic view of the earphone of FIG. 1 after removal of the earphone housing and diaphragm;
fig. 14 (a), (b), and (c) are front, top, and bottom views, respectively, of the earphone part structure of fig. 1.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. While the description of the application will be presented in connection with certain embodiments, it is not intended to limit the features of this application to only this embodiment. Rather, the purpose of the description in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the application. The following description contains many specific details for the purpose of providing a thorough understanding of the present application. The application may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should be understood that in the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and for example, the terms "connected" may be either detachably connected or non-detachably connected; may be directly connected or indirectly connected through an intermediate medium. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the embodiment of the present application, "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
Referring to fig. 1 to 4, an embodiment of the present application provides an earphone, which includes an earphone housing 700, a tub 100, a first sound emitting unit 200, and a second sound emitting unit 300; the basin stand 100 is arranged on the earphone shell 700; the first sound generating unit 200 includes a magnetic circuit structure 210 mounted on the frame 100, a diaphragm 230, and a voice coil 220 connected to the diaphragm 230, the magnetic circuit structure 210 has an annular air gap 211, the diaphragm 230 is spaced from the magnetic circuit structure 210, at least a portion of the voice coil 220 is accommodated in the annular air gap 211, and a bass vibration sound source surface 200a is formed at the connection between the voice coil 220 and the diaphragm 230; the second sound generating unit 300 is mounted on a side of the magnetic circuit structure 210 facing the diaphragm 230 (as shown in fig. 1) or an outer periphery of the basin stand 100, and the second sound generating unit 300 has a high-pitched vibration sound source surface 300a, and the high-pitched vibration sound source surface 300a and the low-pitched vibration sound source surface 200a are oriented in the same direction.
The earphone can be a headphone or an ear-hanging earphone, and the earphone can be used for wrapping the ears when the earphone is worn.
The earphone provided by the embodiment of the application uses the moving coil loudspeaker as the first sound emitting unit 200, and has higher low-frequency lower potential capability. The second sounding unit 300 is provided at the side of the magnetic structure 210 of the first sounding unit 200 or the outer circumference of the tub 100, and has a capability of outputting high frequency sound. Since the first sound generating unit 200 and the second sound generating unit 300 can respectively output sounds with different frequencies, the earphone can simultaneously meet the requirements of high and low frequencies, and the high-frequency extension and low-frequency diving performance are improved. Compared with the traditional earphone which adopts the axial stacking of the high-pitch unit and the low-pitch unit, the second sound generating unit 300 in the earphone is positioned at one side of the magnetic circuit structure 210 or the periphery of the basin frame 100, so that the axial size of the earphone is smaller, the overall thickness of the earphone is close to that of the single-moving-coil unit, and the space utilization rate is improved.
The first sound generating unit 200 and the second sound generating unit 300 are speakers, and can output sounds in different frequency ranges. Low, medium, high frequency, and relatively high and low frequency. The pronunciation frequency of the second pronunciation unit 300 is greater than that of the first pronunciation unit 200, and the two pronunciation frequencies are opposite, and may have a partial overlapping area or may have no overlapping area, where the maximum pronunciation frequency of the second pronunciation unit 300 is greater than that of the first pronunciation unit 200, or the frequency point with the maximum energy of the second pronunciation unit 300 is greater than that of the first pronunciation unit 200 (the frequency point with the maximum energy may be understood as the frequency point with the highest loudness). The voice coil 220 in the first sound emitting unit 200 may vibrate in a first frequency range, and the first sound emitting unit 200 generates low and medium frequency sounds. The second sound generating unit 300 may vibrate in a second frequency range, generating high frequency sound. For example, the first frequency range is 50 hertz (Hz) to 5000Hz. The second frequency range is 300Hz to 20000Hz. The specific pronunciation frequency range is not limited. In the first sound generating unit 200, the magnetic circuit structure 210 is used to provide a first magnetic field. When voice coil 220 is subjected to an audio current in a first magnetic field provided by magnetic structure 210, voice coil 220 generates a second magnetic field that varies with the audio current. The second magnetic field interacts with the first magnetic field provided by the magnetic circuit structure 210, so that the voice coil 220 vibrates along with the audio current in the first magnetic field of the magnetic circuit structure 210, and the voice coil 220 is connected to the diaphragm 230, and the voice coil 220 drives the diaphragm 230 to vibrate, so as to generate the same sound as the original audio current waveform.
The earphone adopts the frequency divider to distinguish the sound signals with different frequency bands, amplifies the sound signals respectively, then transmits the sound signals to the first sound emitting unit 200 and the second sound emitting unit 300 for replay, realizes the separate promotion of low-frequency diving and high-frequency bandwidth expansion, and obtains better tone quality experience. The frequency divider is a conventional component and can conveniently obtain a wide range by combining pronunciation units capable of outputting different frequency bands.
According to the loudspeaker test standard recommended by national standard or International Electrotechnical Commission (IEC), the earphone is arranged on the simulated ear to perform simulated ear test. The artificial ear is a coupling cavity for receiving acoustic signals instead of the human ear. The sound recording file signals are input to the earphone, a first sound emitting unit, a second sound emitting unit and a synthesized frequency response curve shown in fig. 5 can be obtained, the loudness of the frequency response curve of the first sound emitting unit in a middle-low frequency band is higher, the loudness of the frequency response curve of the second sound emitting unit in a high frequency band is higher, the frequency response curves of the two sound emitting units are synthesized, the unevenness of the synthesized frequency response curve becomes smaller, the frequency response curve is flat, and the improvement of the tone quality of different frequency bands of the earphone is facilitated.
In some embodiments, referring to fig. 1, an ear cup 800 is disposed on the earphone shell 700, the ear cup 800 and the earphone shell 700 enclose a front cavity 801, and the first sound emitting unit 200 and the second sound emitting unit 300 are disposed toward the front cavity 801. The earmuff 800 is generally provided in a ring shape, and the earmuff 800 covers the entire auricle when the earphone is worn, and the earmuff 800 can reduce external noise and also provide comfort and sealability when the earphone is worn. The bass vibration sound source surface 200a of the first sound generating unit 200 and the treble vibration sound source surface 300a of the second sound generating unit 300 are both located on the earphone shell 700, and sound waves generated by the first sound generating unit 200 and the second sound generating unit 300 pass through a front cavity 801 surrounded by the earmuff 800 and the earphone shell 700 and then enter the auditory canal of a person.
After the earmuff 800 is disposed, the distance between the high-pitched vibration sound source surface 300a of the second sound producing unit 300 and the eardrum of the human ear is increased, so that the distance between the high-pitched vibration sound source surface 300a of the second sound producing unit 300 and the eardrum of the human ear is further, which may result in insufficient high-frequency response heard by the human ear. Referring to fig. 1, in order to improve the middle-high pitch output sound quality of the second sound producing unit 300, in some embodiments, a horn 910 is provided on the second sound producing unit 300, the horn 910 is located in the front cavity 801, the horn 910 has a first end 911 and a second end 912 that are disposed opposite to each other, the first end 911 is aligned with the periphery of the second sound producing unit 300, and the second end 912 is disposed towards the sound producing direction of the second sound producing unit 300. The horn 910 may be shaped as an index, a linear or other shape, the index horn is a horn shape with an inner diameter from small to large, the linear horn is a tubular shape with an equal inner diameter, wherein the inner diameter of one side of the horn close to the second sound generating unit 300 is smaller, and the inner diameter of one side of the horn far from the second sound generating unit 300 is larger. The horn 910 is used to transmit the middle and high frequency sound generated by the second sound generating unit 300 in a direction from the first end 911 to the second end 912. Compared with the situation without the horn 910, after the horn 910 is arranged, the propagation direction of the sound wave generated by the second sound generating unit 300 is concentrated, so that the high-frequency sensitivity and the effective bandwidth of the second sound generating unit 300 can be improved, and a good high-frequency sound quality effect can be realized.
The sensitivity of a loudspeaker, also called sound pressure level, is the sound pressure level measured at a distance of l meters (m) from the loudspeaker axis when the loudspeaker is given a signal of 1 watt (W) of electrical power. The high frequency sensitivity improvement is the high frequency response improvement, which is reflected by the upward shift of the frequency response curve in the high frequency region as shown in fig. 6.
The effective bandwidth refers to the effective range of the speaker frequency response. On the frequency response curve of the loudspeaker, which is measured by inputting sinusoidal signals to the loudspeaker, the frequency response curve is positioned in the bandwidth of one octave of the highest sensitivity area, the arithmetic mean of sound pressure level is calculated by taking four points according to 1/3 octave, a transverse line is formed by reducing the arithmetic mean by 10dB, and the frequency range corresponding to the intersection point of the transverse line and the high end and the low end of the frequency response curve is formed. The high frequency bandwidth extension is reflected in the extension of the frequency response curve in the frequency axis to a higher frequency direction as shown in fig. 6.
The headphones of the present application were mounted on a baffle and tested in the free field according to the national standard or International Electrotechnical Commission (IEC) recommended speaker test standards. The baffle is used for isolating the phase-inverted sound wave generated on the back of the loudspeaker and reducing the diffraction interference of the phase-inverted sound wave to the positive-phase sound wave. The sine wave signal is input to the earphone, and the sound pressure generated by the earphone is received by the microphone and converted into an electric signal, so that the frequency response curve of the earphone shown in fig. 7 can be obtained. From fig. 7, it can be derived that the effective bandwidth of the earphone of the present application is greatly improved.
After the horn 910 is provided to improve the middle and high frequency sound quality of the second sound emitting unit 300, it is necessary to improve the low frequency sound quality of the first sound emitting unit 200 to improve the earphone sound emitting balance. In some embodiments, referring to fig. 1, a grill frame 920 is disposed on the earphone housing 700, the grill frame 920 is disposed on the diaphragm 230, and the grill frame 920 has a plurality of sound outlet holes 921 for the first sound emitting unit 200 to emit sound. The sound generated by the first sound generating unit 200 is guided by the grille 920 and is output by the plurality of sound outlet holes 921, so that the low-frequency sound quality of the first sound generating unit 200 can be improved, and the sound outlet balance of the earphone can be improved. The grill frame 920 has a space provided therein so that the diaphragm 230 and the voice coil 220 in the first sound emitting unit 200 can freely move therein.
For example, the grating frame 920 may have a cylindrical shape or a partial spherical surface, one end of the grating frame 920 is a mouth, and the other end is provided with a plurality of sound outlet holes 921. When assembled, the mouth portion of the grill frame 920 surrounds the diaphragm 230 in the first sound emitting unit 200, and the mouth end of the grill frame 920 is fastened to the earphone housing 700 by snap, adhesive or other means. The structure is easy to form and assemble.
Wherein, the damping layer 105 can be attached to the grille 920 to cover the sound outlet 921, and the damping layer can provide air flow, so that the sound wave can be conveniently spread outwards, and external substances can be prevented from entering the earphone. The damping layer can be made of porous material such as non-woven fabric and microperforated material.
In the case of disposing the horn 910 and the grill frame 920, in some embodiments, referring to fig. 1, the horn 910 and the grill frame 920 are integrally formed, the second end 912 of the horn 910 is connected to the grill frame 920, the first end 911 of the horn 910 is fixed or abutted to the outer periphery of the second sound unit 300, and the edge of the grill frame 920 is connected to the earphone housing 700. The horn 910 and the grill frame 920 are provided as an integral structure, which is easy to mold and assemble. Between the first end 911 of the horn 910 and the outer circumference of the second sound unit 300, adhesion, snap-fit or other assembly means may be used between the grill frame 920 and the earphone housing 700.
In order to improve the low frequency sound quality in the earphone, referring to fig. 1, in some embodiments, the earphone housing 700 includes an annular partition 710 and a first rear housing 720, the front side of the annular partition 710 and the bass vibration source face 200a face the same, and the basin stand 100 is mounted at the inner hole of the annular partition 710. The first rear case 720 is connected to the rear side of the annular partition 710, and the first rear case 720 covers the rear portion of the first sound emitting unit 200, and the inner side of the first rear case 720, the rear side of the annular partition 710 and the rear side of the first sound emitting unit 200 enclose a first rear cavity 730. The first rear case 720 has a first resonance passage 721 communicating with the first rear chamber 730. Referring to fig. 4, the tub 100 has ventilation holes 104 and/or the magnetic circuit structure 210 has ventilation holes 2123, and the annular air gap 211 and the first rear cavity 730 are communicated through the ventilation holes.
Wherein the front side and the rear side of the annular partition 710 are opposite, and the front side is the side facing the human ear. The first resonance passage 721 is a passage structure formed on the first rear case 720, and may be provided as a tube or a hole. The annular air gap 211 in the first sound emitting unit 200 is communicated with the first rear cavity 730 through air holes (104, 2123), so that air can flow between the annular air gap 211 and the first rear cavity 730 to form a helmholtz resonator, which is called a first resonator for short.
The natural frequency formula of the helmholtz resonator is as follows:
wherein f 0 Is the resonance frequency of the helmholtz resonator, c is the speed of sound, S is the cross sectional area of the opening or the resonance channel, d is the diameter of the opening or the resonance channel, l is the length of the opening or the resonance channel, and V is the volume of the cavity communicating with the opening or the resonance channel. When the frequency of the incident sound wave entering the opening or the resonance channel approaches the natural frequency of the resonator, the vibration velocity of the air in the opening or the resonance channel is maximized to consume the sound energy.
The natural frequency of the first resonator can be obtained by setting appropriate parameters for the first resonator, such as the volume of the first rear chamber 730, the cross-sectional area and the length of the ventilation holes. When the first sound emitting unit 200 operates, sound waves are generated, and the sound waves enter the air holes and the first rear chamber 730, and the air in the air holes and the first rear chamber 730 may vibrate. When the frequency of the incident sound wave entering the air holes is close to the natural frequency of the first resonator, the air in the air holes is strongly vibrated to consume sound energy, so that the frequency response of the earphone at the middle and low frequency points is reduced, the low frequency sensitivity is reduced, the flatness of the middle and low frequency response curve is improved, and the middle frequency or low frequency tone quality of the earphone is improved. The number of the ventilation holes can be multiple, and the ventilation holes can be circular, arc-shaped or other shapes.
In the case that only the first rear cavity 730 is provided, and the second rear cavity is not provided, that is, the first resonant passage 721 on the first rear housing 720 communicates the first rear cavity 730 with the external space 10 of the earphone, and the first resonant passage 721 is combined with the air volume in the first rear cavity 730, so that as a part of the first resonator, the frequency response of the earphone at the natural frequency of the resonator can be reduced, and the intermediate frequency or low frequency sound quality of the earphone can be improved. The first resonant passage 721 may be provided on a surface of the first rear case 720, such as the resonant passage is integrally formed on the rear case.
In some embodiments, the air holes 104 of the basin stand 100 may be provided with a damping layer 105, the air holes 2123 of the magnetic circuit structure 210 may be provided with a damping layer 2124, and the damping layer may be used for air flow to generate damping to absorb air flow energy passing through the air holes, so as to reduce the frequency response at the natural frequency, make the middle-low frequency response flatter, and improve the middle-frequency or low-frequency sound quality of the earphone. The damping layer can be made of porous material such as non-woven fabric and microperforated material.
In order to further improve the low frequency sound quality in the earphone, in the case of providing the first rear housing 720 and forming the first rear chamber 730, referring to fig. 8, in some embodiments, the earphone housing 700 further includes a second rear housing 740, the second rear housing 740 is connected to the rear side surface of the annular partition 710, the second rear chamber 750 is defined by the inner side surface of the second rear housing 740, the rear side surface of the annular partition 710 and the outer side surface of the first rear housing 720, and the first rear chamber 730 and the second rear chamber 750 are communicated through the first resonant channel 721; the annular partition 710 has a through hole 711 communicating the front chamber 801 and the second rear chamber 750.
The earphone of this embodiment adopts a dual rear cavity design, and the first rear cavity 730 and the second rear cavity 750 are communicated through the first resonant channel 721, so that air can flow between the first rear cavity 730 and the second rear cavity 750, and the front cavity 801 and the second rear cavity 750 are communicated through the via hole 711, so that air can flow between the front cavity 801 and the second rear cavity 750, and a helmholtz resonator, which is abbreviated as a second resonator, is formed. The natural frequency of the second resonator can be changed by setting appropriate parameters such as the volume of the second rear chamber 750, the cross-sectional area and length of the first resonance passage 721, the cross-sectional area and length of the through hole 711 to the second resonator. When the first sound emitting unit 200 operates, sound waves are generated, and air in the air holes and the first rear chamber 730 vibrate, and air in the first resonance passage 721, the second rear chamber 750, and the through holes 711 also vibrate. The first acoustic unit 200 operates to generate acoustic waves, similar to the first resonator, when the frequency of the incident acoustic wave entering the first resonant channel 721 is close to the natural frequency of the second resonator, the air in the first resonant channel 721 is strongly vibrated to consume acoustic energy, and the second resonator can reduce the frequency response of the earphone at another middle-low frequency point, improve the low frequency sensitivity, improve the flatness of the middle-low frequency response curve, and improve the middle-frequency or low frequency tone quality of the earphone. The natural frequency of the second resonator may be set higher than that of the first resonator, reducing the magnitude of the frequency response at higher, middle and lower frequency points.
The through hole 711 may be provided with a damping layer, and the damping layer may be used for air flow to generate damping to absorb airflow energy passing through the through hole 711, so as to reduce frequency response when the natural frequency of the resonator is reduced, make the middle-low frequency response flatter, and improve middle-frequency or low-frequency sound quality of the earphone. The damping layer can be made of porous material such as non-woven fabric and microperforated material.
When the earphone housing 700 is provided, the annular spacer 710, the first rear housing 720 and the second rear housing 740 may be assembled, or the annular spacer 710 and the first rear housing 720 may be integrally formed and the second rear housing 740 may be assembled to the annular spacer 710.
In the embodiment shown in fig. 8, the first rear housing 720 and the second rear housing 740 each have a housing shape having an opening, such as a cylindrical shape or a partial spherical surface, the open ends of both the first rear housing 720 and the second rear housing 740 are connected to the annular partition 710, and the second rear housing 740 is sleeved outside the first rear housing 720. The first resonance passage 721 may be disposed at any position on the surface of the first rear case 720, and the second resonance passage 741 may be disposed at any position on the surface of the second rear case 740, such as the resonance passage integrally formed on the corresponding rear case.
In other embodiments, the first rear housing 720 and the second rear housing 740 each have a housing shape with an opening, the first rear housing 720 and the second rear housing 740 are connected at an end remote from the annular partition 710, and the second rear chamber 750 is substantially annular. Alternatively, the first rear case 720 has a case shape with an opening, the opening end of the first rear case 720 is connected to the annular partition 710, and the second rear case 740 is connected to a part of the outer circumference of the first rear case 720, so that the first rear chamber 730 and the second rear chamber 750 are communicated with each other through the first resonant passage 721. These modes are all the earphone double back cavity modes. The first resonance passage 721 may be provided at an outer circumferential surface of the first rear case 720, and the second resonance passage 741 may be provided at an arbitrary position on a surface of the second rear case 740, such as the resonance passage integrally formed on the corresponding rear case.
In order to further enhance the low frequency sound quality in the earphone, in the case where the first rear case 720 and the second rear case 740 are provided and form a double rear chamber, referring to fig. 9, in some embodiments, the second rear case 740 has one or more second resonance passages 741 communicating the second rear chamber 750 with the external space 10. The second resonance passage 741 is a passage structure formed on the second rear case 740, and may be provided as a tube or a hole. The second resonance channel 741 is combined with the air volume in the second rear cavity 750, and as a part of the second resonator, the natural frequency of the resonator corresponding to the second resonance channel 741 can be set higher than the natural frequency of the resonator corresponding to the first resonance channel 721, so that the frequency response at the higher, middle and lower frequency points is reduced, the flatness of the middle and lower frequency response curve is improved, and the middle and lower frequency sound quality of the earphone is further improved. The second resonance passage 741 may be integrally formed on the surface of the second rear case 740. By providing a plurality of second resonance passages 741, a plurality of helmholtz resonators having different natural frequencies can be obtained by adjusting the cross sectional area and the length of the second resonance passages 741.
When a helmholtz resonator having a second resonance passage is provided, the volume range of the second rear chamber 750 is 4 cubic centimeters (cm) 3 ) To 16cm 3 The length of the second resonance passage 741 ranges from 4 millimeters (mm) to 20mm, and the cross-sectional area of the second resonance passage 741 ranges from 3 square millimeters (mm) 2 ) To 10mm 2 . The Helmholtz resonator formed by the values of the parameters in the range can reduce the frequency response of the earphone at a low frequency point below 1kHz, reduce the low frequency sensitivity, improve the flatness of a low frequency response curve, and meet the requirements of passive noise reduction of noise in an external space 10 due to the length and the cross section area of a proper second resonance channel 741, thereby improving the low frequency tone quality of the earphone, and the second rear shell 740 with the second resonance channel 741 is easy to mold. The earphone of the embodiment avoids the loss of passive noise reduction caused by too short length of the second resonance channel 741 and too large cross section area of the second resonance channel 741, and the noise in the external space 10 enters the human ear from the second resonance channel 741 to affect the sound quality; and the problems that the process implementation difficulty is increased and the consistency is poor due to the fact that the length of the second resonance channel 741 is too long and the cross section area of the second resonance channel is too small are also avoided.
When providing a helmholtz resonator with a second resonance channel, in some embodiments the volume of the second rear chamber 750 ranges from 6cm 3 To 12cm 3 . In some embodiments, the length of the second resonant channel 741 ranges from 6mm to 16mm. In some embodiments, the cross-sectional area of the second resonant passage 741 is in the range of 4mm 2 To 8mm 2 . The Helmholtz resonator formed by the values in the range can effectively improve the low-frequency tone quality of the earphone, and the structure is easy to form. The volume of the second rear cavity 750 is in the range of 8cm 3 Two second resonance channels 741 are arranged, the lengths of the two second resonance channels 741 are respectively 10mm and 16mm, and the cross-sectional areas of the two second resonance channels 741 are respectively 6mm 2 Therefore, the frequency response of the earphone at two low frequency points can be reduced, and the flatness of the medium-low frequency response curve is improved.
When a plurality of resonance channels are arranged, the response of different frequency points can be improved, and how to arrange the plurality of resonance channels in a smaller space of a rear cavity of the earphone and increase the length of the resonance channels is a problem to be solved. Referring to fig. 10, in some embodiments, the second rear case 740 has a main passage 7411 and a plurality of sub-passages (7412, 7413), the main passage 7411 has opposite ends, one end of the main passage 7411 communicates with the second rear chamber 750, the other end of the main passage 7411 communicates with the plurality of sub-passages (7412, 7413), and one end of the plurality of sub-passages (7412, 7413) remote from the main passage 7411 is connected to the second rear case 740 and communicates with the external space 10, respectively, and the main passage 7411 and each of the sub-passages (7412, 7413) communicate to form a second resonance passage (741 a, 741 b), respectively. The second resonant channel adopts a combination mode of a main channel and a plurality of sub-channels, namely the main channel 7411 is used as a shared channel to be communicated with the second rear cavity 750, and each sub-channel is used as a branch to be communicated with the external space 10, so that more resonant channels can be arranged in a smaller space, the frequency response of different middle and low frequency points is improved, and the compact structure of the rear cavity of the earphone is satisfied. Thus, the length of the second resonance channel can be increased, and the noise of the external space 10 can be reduced from entering the human ear through the second resonance channel, so that the passive noise reduction effect is better. The number of sub-channels may be set as desired.
Illustratively, the earphone is provided with a dual rear cavity, the first rear housing 720 having two second resonant channels (741 a, 741 b). Referring to fig. 10, two second resonant channels (741 a, 741 b) employ a combination of a main channel 7411 and a plurality of sub-channels (7412, 7413). One end of the main channel 7411 is communicated with a sub-channel 7412 and a sub-channel 7413, the sub-channel 7412 and the main channel 7411 form a second resonance channel 741a, and the sub-channel 7413 and the main channel 7411 form a second resonance channel 741b.
In the embodiment shown in fig. 10, the primary passageway 7411 extends in a straight line having a length L5. The sub-channel 7412 extends in an L shape and has a length of L3+L4, and one end of the sub-channel 7412 is connected with one end of the main channel 7411 in a straight line. The sub-channel 7413 extends straight and has a length L3, and the sub-channel 7413 is vertically connected to one end of the main channel 7411. Then, the length of the second resonance passage 741a is l1=l3+l4+l5, and the length of the second resonance passage 741b is l2=l3+l5. The cross-sectional areas of the two second resonant channels are equal. The volume of the second rear cavity 750, the length and cross-sectional area of the second resonant channels (741 a, 741 b) are valued to obtain the natural frequencies of the resonators corresponding to the different resonant channels. For example, the second resonance channel 741a resonates before 400Hz at a lower frequency to reduce the lower frequency point and its vicinity, and the other second resonance channel 741b resonates at 600Hz to 1kHz to reduce the higher frequency point and its vicinity, reducing the sensitivity at the peak of the frequency response, so that the low frequency curve in the earphone becomes flatter.
In other embodiments, the main channel and the sub-channels may extend in a straight line, a curved line, an L-shape, or in other ways, and may be connected at different angles.
There are different alternative implementations when the first sound emitting unit 200 and the second sound emitting unit 300 are provided. The first implementation manner is that the first sound emitting unit 200 and the second sound emitting unit 300 are nested and coaxially arranged: referring to fig. 1 and 3, the second sound generating unit 300 is disposed in one, the second sound generating unit 300 is mounted in the middle of a side of the magnetic circuit structure 210 facing the diaphragm 230, and the second sound generating unit 300 is disposed coaxially with the first sound generating unit 200. This way it is easy to shape and assemble. The second sound generating unit 300 occupies a smaller space, is arranged on the side of the magnetic circuit structure 210 facing the diaphragm 230, and realizes the frequency division of the high-low sound units without changing the overall size of the low-sound units.
The first sound generating unit 200 is nested in the middle of the second sound generating unit 300, and the high-pitch vibration sound source surface 300a of the second sound generating unit 300 and the low-pitch vibration sound source surface 200a of the first sound generating unit 200 are arranged in a coplanar manner, so that the situation that different units respectively output sounds with different frequencies to generate sound separation can be reduced, and the spatial position sense of the musical instrument is more accurate.
The second implementation is that the first sound emitting unit 200 and the second sound emitting unit 300 are nested in a non-coaxial arrangement: the second sound generating unit 300 is disposed in one, the second sound generating unit 300 is mounted on a side of the magnetic circuit structure 210 facing the diaphragm 230, and the second sound generating unit 300 is disposed eccentrically to the first sound generating unit 200. The eccentric arrangement of the first sound emitting unit 200 and the second sound emitting unit 300 means that the axes thereof are spaced apart. The second sound generating unit 300 occupies a smaller space, is arranged on the side of the magnetic circuit structure 210 facing the diaphragm 230, and realizes the frequency division of the high-low sound units without changing the overall size of the low-sound units.
A third implementation is that a plurality of second pronunciation units 300 are arranged around: referring to fig. 11 and 12, the second sounding units 300 are provided in plurality, and the plurality of second sounding units 300 are provided around the outer circumference of the tub 100. The plurality of second sounding units 300 for generating middle and high tones are arranged around the first sounding unit 200 for generating low tones, and the first sounding unit 200 and the plurality of second sounding units 300 are matched for sounding, so that the output sound has good space sense, and a stereo effect is realized. Because the second sound producing unit 300 occupies a smaller space, the overall structure can be smaller in the axial direction or the radial direction, and the requirement of compact earphone structure can be met.
The three second sounding units 300 are uniformly distributed on the periphery of the first sounding unit 200 and are located on the same plane, so that the overall structure occupies a smaller space and the overall size of the earphone is smaller. The specific number of the second sound units 300 is set as needed.
When a plurality of second sound emitting units 300 are provided, one horn 910 may be provided for each of the different second sound emitting units 300 to guide sounds of the different second sound emitting units 300. The horn 910 and the grill frame 920 may be an integrally formed structure.
There are a number of alternative implementations when arranging the magnetic structure of the first sound generating unit. The first type of magnetic circuit structure is an internal magnetic structure, i.e., a magnet is provided inside the voice coil. Referring to fig. 2 and 4, the magnetic circuit structure 210 includes a magnetic base 212, a magnet 213, and a magnetic plate 214. The magnetism guide seat 212 includes a plate-like portion 2121 and a cylindrical portion 2122 connected to an outer edge of the plate-like portion 2121. The magnet 213 is mounted on the plate 2121, the magnetic conductive plate 214 is mounted on the magnet 213, the outer peripheral surface of the magnet 213 and the outer peripheral surface of the magnetic conductive plate 214 are spaced apart from the inner wall of the cylindrical portion 2122 to form an annular air gap 211, and an opening into which the voice coil 220 extends is formed at one end of the annular air gap 211 near the magnetic conductive plate 214. The cylindrical portion 2122 is attached to the basin stand 100. The magnet 213 is axially magnetized, and the magnetic circuit structure 210 can generate magnetic force lines passing through the annular air gap 211, which is called a first magnetic field.
For example, magnetic force lines may be emitted from the bottom end of the magnet 213, pass through the plate-shaped portion 2121 of the magnet holder 212, reach the top end of the cylindrical portion 2122 along the cylindrical portion 2122, pass through the annular air gap 211, and then return to the top end of the magnet 213. The voice coil 220 extends at least partially through the opening of the annular air gap 211, and generates a second magnetic field when the audio current passes through the voice coil 220, and the second magnetic field of the voice coil 220 interacts with the first magnetic field of the magnetic circuit structure 210, so that the voice coil 220 vibrates to drive the vibrating diaphragm 230 to vibrate.
The second type of magnetic circuit structure is an external magnetic structure, i.e. a magnet is arranged outside the voice coil. The magnetic circuit structure comprises a magnetic conduction seat, a ring magnet and a magnetic conduction ring. The magnetic conduction seat comprises a plate-shaped part and a columnar part connected to the middle part of the plate-shaped part. The annular magnet is arranged on the plate-shaped part, the magnetic conduction ring is arranged on the annular magnet, the inner peripheral surface of the annular magnet and the inner peripheral surface of the magnetic conduction ring are both spaced from the outer peripheral surface of the columnar part to form an annular air gap, and one end of the annular air gap, which is close to the magnetic conduction ring, forms an opening into which the voice coil stretches. The magnetic conduction seat is arranged on the basin stand. The annular magnet is axially magnetized, and the magnetic circuit structure can generate magnetic force lines passing through an annular air gap, which is called a first magnetic field.
For example, the magnetic force lines may be emitted from the bottom end of the magnet, reach the top end thereof along the columnar portion via the plate-like portion of the magnetically permeable seat, pass through the annular air gap, and then return to the top end of the magnet. The voice coil is at least partially stretched into by the opening of annular air gap, produces the second magnetic field when audio frequency electric current passes through the voice coil, and the second magnetic field of voice coil and the first magnetic field interact of magnetic circuit structure, makes the voice coil vibration in order to drive the vibrating diaphragm vibration.
The third magnetic circuit structure is an inner and outer magnetic structure, namely, magnets are respectively arranged on the inner side and the outer side of the voice coil. The magnetic circuit structure comprises a magnetic conduction seat, an inner ring magnet, an outer ring magnet, an inner ring magnetic conduction plate and an outer ring magnetic conduction plate. The inner ring magnet and the outer ring magnet are coaxially arranged on the magnetic conduction seat at intervals, the inner ring magnetic conduction plates and the outer ring magnetic conduction plates are arranged on the inner ring magnet and the outer ring magnet in a one-to-one correspondence manner, the inner ring magnetic conduction plates and the outer ring magnetic conduction plates are spaced, an annular air gap is formed between an assembly formed by the inner ring magnet and the inner ring magnetic conduction plates and an assembly formed by the inner ring magnet and the inner ring magnetic conduction plates, and an opening for the voice coil to extend in is formed at one end of the annular air gap, which is close to the inner ring magnetic conduction plates. The magnetic conduction seat is arranged on the basin stand. The inner ring magnet and the outer ring magnet are magnetized in the axial direction, and the magnetic circuit structure can generate magnetic force lines passing through an annular air gap, which is called a first magnetic field.
For example, magnetic force lines can be emitted from the bottom end of the inner ring magnet, sequentially pass through the magnetic conduction seat, the outer ring magnet and the outer ring magnetic conduction plate, pass through the annular air gap, enter the inner ring magnet and then return to the top end of the inner ring magnet. The voice coil is at least partially stretched into by the opening of annular air gap, produces the second magnetic field when audio frequency electric current passes through the voice coil, and the second magnetic field of voice coil and the first magnetic field interact of magnetic circuit structure, makes the voice coil vibration in order to drive the vibrating diaphragm vibration.
Referring to fig. 2 to 4, in some embodiments, the earphone further includes an elastic suspension 400 for elastically supporting the voice coil 220 and the diaphragm 230 on the tub 100. The elastic suspension 400 is adopted to elastically support the voice coil 220 and the vibrating diaphragm 230 on the basin frame 100, so that the voice coil 220 and the vibrating diaphragm 230 vibrate within a preset range, the condition of swinging polarization is reduced, and the reliability is improved.
In specific setting the elastic suspension, referring to fig. 13, the elastic suspension 400 includes an inner ring portion 410, an intermediate ring portion 420, and an outer ring portion 430 that are coaxially disposed, a first suspension arm 440 connected between the inner ring portion 410 and the intermediate ring portion 420, and a second suspension arm 450 connected between the intermediate ring portion 420 and the outer ring portion 430, where the first suspension arm 440 and the second suspension arm 450 are suspended. The ring structures of the inner ring portion 410, the middle ring portion 420 and the outer ring portion 430 may be circular, elliptical, polygonal, rounded rectangular, etc. Illustratively, these annular structures are each configured as a circle, with the diameter of the outer ring portion 430 being greater than the diameter of the middle ring portion 420, and the diameter of the middle ring portion 420 being greater than the diameter of the inner ring portion 410. The diameter here refers to the average of the inner and outer diameters of the annular structure. Referring to fig. 3, the diameter of voice coil 220 is close to the diameter of middle ring 420, and voice coil 220 is connected to middle ring 420. The inner ring portion 410 is disposed adjacent to the second sounding unit 300, and the outer ring portion 430 is connected to the tub 100. When the voice coil 220 vibrates up and down in the annular air gap 211, the middle ring 420 and the connection part between the diaphragm 230 and the middle ring 420 follow the vibration, and the first cantilever 440 and the second cantilever 450 pull the inner side and the outer side of the middle ring 420, so as to play a role in guiding the voice coil 220 and the diaphragm 230 to vibrate in a predetermined range, effectively reduce the swing polarization and even the breakage of the voice coil 220, and improve the reliability of the first sound generating unit 200.
Illustratively, the resilient suspension 400 may be integrally formed, which facilitates mass production. Alternatively, the resilient suspension 400 may be divided into multiple parts that are welded together. For example, the inner ring portion 410, the middle ring portion 420, the outer ring portion 430, the first suspension arm 440, and the second suspension arm 450 are all separate components, and the respective components are connected to form the elastic suspension 400 as a whole. This approach is suitable for making a larger radial size resilient suspension 400.
For example, the diaphragm 230 and the voice coil 220 may be connected to both sides of the middle ring 420, respectively, such that the voice coil 220 is connected to the diaphragm 230, for example, the voice coil 220 is soldered to one side of the middle ring 420, the diaphragm 230 is bonded to the other side of the middle ring 420, so as to form a bi-compliant system effective in controlling wobble, and the voice coil 220 and the diaphragm 230 are elastically supported on the frame 100 by the elastic suspension 400.
In some embodiments, referring to fig. 3 and 13, the elastic suspension 400 is configured as a flexible circuit board for providing audio current to the voice coil 220 and the second sound unit 300 in order to improve the assembly efficiency of the voice coil and the second sound unit. The outer ring 430 has an input terminal 431, the voice coil 220 is electrically connected to the middle ring 420, and the second sound unit 300 is electrically connected to the inner ring 410. The flexible circuit board is provided with a conductive wire (not shown) and a plurality of positive and negative terminals 411 and 421. During assembly, the voice coil 220 and the second sound producing unit 300 are respectively arranged on the middle ring part 420 and the inner ring part 410, corresponding positive and negative terminals are welded, the end part of the voice coil 220 is connected with the positive and negative terminal 421 of the middle ring part 420, the second sound producing unit 300 is connected with the positive and negative terminal 411 of the inner ring part 410, the input terminal 431 of the outer ring part 430 is connected with an external circuit, the circuit is completed to realize signal transmission, manual lead wires for the voice coil 220 and the second sound producing unit 300 are not needed, the process difficulty is reduced, the assembly efficiency and reliability are improved, and the automatic process is convenient to realize.
For example, referring to fig. 2, the second sound generating unit 300 may be configured with an auxiliary flexible circuit board 301, and the auxiliary flexible circuit board 301 is soldered to the inner ring portion 410 of the elastic suspension 400, so that the elastic suspension 400 is conveniently manufactured, and the auxiliary flexible circuit board 301 may be bent, so that the second sound generating unit 300 is conveniently assembled with the elastic suspension 400, and the second sound generating unit 300 is adjusted to a predetermined position so that the bass vibration sound source surface 200a and the treble vibration sound source surface 300a are coplanar as much as possible. In addition, the second sound unit 300 may be directly integrated on the inner ring portion 410 of the elastic suspension 400.
For example, referring to fig. 13, the outer ring portion 430 of the elastic suspension 400 may be provided with two sets of input terminals 431 as signal input terminals of the second sound generating unit 300 and the voice coil 220, respectively, so as to realize separate transmission of different audio signals. It will be appreciated that the outer ring portion 430 may be provided with one or more sets of input terminals 431 for signal transmission.
In addition, the flexible circuit board may be electrically connected to a system in package (System In a Package, SIP) chip, so as to drive the first and second sounding units 200 and 300. Referring to fig. 14, a wiring board 460 may be disposed on the side of the basin stand 100 facing away from the diaphragm 230 or on the outer wall of the magnetic conductive seat, where the wiring board 460 is electrically connected to the flexible circuit board, and the wiring board has a wiring terminal, so that the speaker is convenient to connect with an external circuit.
In some embodiments, to improve the fatigue resistance of the suspension arms, the suspension arms of the elastic suspension are arranged to be relatively long in a limited space, and referring to fig. 13, the first suspension arm 440 and the second suspension arm 450 are each arranged to meander. Taking the first cantilever 440 as an example, the first cantilever 440 includes a first radially extending arm 441, a circumferentially extending arm 442 and a second radially extending arm 443 that are sequentially connected, and the first radially extending arm 441 and the second radially extending arm 443 are respectively in different radial directions, so that the first cantilever 440 can be set to be relatively long and meet the requirement of space shortage. The second boom 450 is similar and will not be described again.
In some embodiments, in order to make the vibration at two radial sides of the voice coil symmetrical, the vibration suppression is effectively reduced, the sound quality effect is improved, and a mode of arranging cantilevers in a central symmetry manner can be adopted. Referring to fig. 13, the number of the first cantilevers 440 is plural, and the plurality of first cantilevers 440 are symmetrically disposed about the axis of the middle ring 420. The number of the second cantilevers 450 is plural, and the plurality of second cantilevers 450 are symmetrically arranged centering around the axis of the middle ring 420. That is, the bending modes of the respective first cantilevers 440 are identical, and the bending modes of the respective second cantilevers 450 are identical. Illustratively, three first cantilevers 440 are centrally symmetrically arranged between the inner ring portion 410 and the middle ring portion 420, four second cantilevers 450 are centrally symmetrically arranged between the middle ring portion 420 and the outer ring portion 430, and the specific number of cantilevers is not limited.
As an example, the elastic suspension, the voice coil, the vibrating diaphragm and the magnetic circuit structure all adopt a centrosymmetric structure, so that three factors of quality, compliance and magnetic field intensity are completely centrosymmetric, and the output tone quality of the first sound generating unit is improved. Wherein compliance refers to the softness of the axial movement of the vibrating element.
In some embodiments, in order to increase the sound emitting area of the first sound emitting unit to obtain better sound quality, referring to fig. 13, the ratio between the diameter difference of the outer ring portion 430 and the middle ring portion 420 and the diameter difference of the middle ring portion 420 and the inner ring portion 410 ranges from 0.6 to 1.4. The diameter here refers to the average of the inner and outer diameters of the annular structure. Thus, the voice coil 220 is disposed at a position substantially midway between the inner and outer edges of the diaphragm 230, and the sound emitting area of the first sound emitting unit 200 is increased to enhance the sound emitting effect of the first sound emitting unit 200.
In order to make the high-pitched vibration sound source face and the low-pitched vibration sound source face coplanar when the second sound generating unit is mounted, referring to fig. 2, a bracket 500 is disposed in the middle of the side of the magnetic circuit structure 210 facing the diaphragm 230, and the second sound generating unit 300 is mounted on the bracket 500. This lifts the position of the second sound generating unit 300 a certain distance relative to the magnetic structure 210 so that the junction between the diaphragm 230 and the voice coil 220 remains coplanar with the second sound generating unit 300. The outer diameter of the bracket 500 is smaller than that of the tub 100, and the supporting effect of the bracket 500 on the second sound unit 300 is satisfied.
For example, when the first magnetic circuit structure 210 is adopted, the magnetic conductive plate 214 is disposed on the upper side of the magnetic circuit structure 210, and the assembling groove 2141 is disposed on the upper surface of the magnetic conductive plate 214, so that the bracket 500 is convenient for positioning and assembling, so as to improve the assembling efficiency. It will be appreciated that when other magnetic structures are used, the mounting slots may also be provided to locate and mount the support.
When the elastic suspension 400 is installed, the inner ring portion 410 of the elastic suspension 400 may be connected to the bracket 500, and the outer ring portion 430 is connected to the tub frame 100, so that the assembly of the elastic suspension 400 is facilitated, and the elastic suspension 400 is made larger in a limited space, and accordingly, the first suspension arm 440 and the second suspension arm 450 may be made longer, thereby meeting the requirement of the elastic suspension 400 for the elastic support of the voice coil 220 and the diaphragm 230.
In some embodiments, in order to make the air pressures at both sides of the second sound unit approach to obtain better sound quality, referring to fig. 3, the middle part of the magnetic circuit structure 210 has an axial through hole 215, and the bracket 500 has a mounting groove 501 for mounting the second sound unit 300, where the mounting groove 501 communicates with the axial through hole 215. Thus, the second sound generating unit 300 can be stably assembled in the mounting groove 501, the inner side of the second sound generating unit 300 is communicated with the outside through the axial through hole 215 of the magnetic circuit structure 210, the condition that negative pressure exists on the inner side of the second sound generating unit 300 is reduced, the air pressures on two sides of the second sound generating unit 300 are close, and the output sound effect of the second sound generating unit 300 is improved. Wherein the second sound unit 300 may be mounted on the bracket 500 by bonding, clamping, tight fitting or other means.
Illustratively, when the first magnetic circuit structure 210 is adopted, through holes are respectively formed in the middle part of the plate-shaped part 2121 of the magnetic conduction seat 212, the middle part of the magnet 213 and the middle part of the magnetic conduction plate 214, so that the axial through hole 215 of the magnetic circuit structure 210 can be formed. When other magnetic circuit structures are adopted, through holes are formed in the corresponding structures, axial through holes can be formed, and the mounting grooves of the support are matched to realize the communication between the inner side of the second sounding unit and the outside.
In some embodiments, in order to make the air pressures at two sides of the diaphragm of the first sound generating unit approach to obtain better sound quality, referring to fig. 2 and 3, the sidewall of the bracket 500 has a vent 502, and the annular air gap 211 is communicated with the axial through hole 215 through the vent 502. Thus, the inner side of the diaphragm 230 is communicated with the outside through the vent 502 of the bracket 500 and the axial through hole 215 of the magnetic circuit structure 210, so that the condition that negative pressure exists on the inner side of the diaphragm 230 is reduced, the air pressures on the two sides of the diaphragm 230 are close, and the output sound effect of the first sound generating unit 200 is improved. Illustratively, the bracket 500 is generally cylindrical in shape, and the sidewall of the bracket 500 may be provided with a plurality of ventilation holes 502 circumferentially to facilitate the flow of gas between the annular air gap 211 and the axial through holes 215.
When the diaphragm is assembled to the bracket and the basin frame, referring to fig. 4, the bracket 500 has a first positioning groove 503, and the basin frame 100 has a second positioning groove 101; a first supporting ring 601 is arranged at the first positioning groove 503, and a second supporting ring 602 is arranged at the second positioning groove 101; the inner edge of the diaphragm 230 is connected to the first support ring 601, and the outer edge of the diaphragm 230 is connected to the second support ring 602. This facilitates the assembly of the diaphragm 230 to the holder 500 and the tub frame 100, so that the bass vibration source surface 200a at the junction between the voice coil 220 and the diaphragm 230 can be coplanar with the treble vibration source surface 300a of the second sound generating unit 300 as much as possible. The first support ring 601 and the second support ring 602 are respectively disposed in the first positioning groove 503 and the second positioning groove 101, so that the axial space can be effectively utilized, the structure is compact, and the inner edge and the outer edge of the diaphragm 230 are higher than the connection position between the voice coil 220 and the diaphragm 230, which is beneficial to forming a larger space for vibration of the diaphragm 230, so as to improve the output sound effect of the first sound generating unit 200. The shapes of the first support ring 601 and the second support ring 602 are set according to the shape of the diaphragm 230.
In some embodiments, to increase the stiffness of the diaphragm, a double dome diaphragm may be used. Referring to fig. 3, the diaphragm 230 includes a first annular portion 231 and a second annular portion 232 coaxially disposed, wherein an outer edge of the first annular portion 231 is connected with an inner edge of the second annular portion 232, and a radial cross section of the first annular portion 231 and a radial cross section of the second annular portion 232 are arched. Voice coil 220 is connected to the junction between first annular portion 231 and second annular portion 232. The inner concave surface of the first annular portion 231 and the inner concave surface of the second annular portion 232 are both disposed towards the magnetic circuit structure 210, which is beneficial to improving the rigidity of the diaphragm 230 and the reliability of the up-down vibration of the diaphragm 230. It will be appreciated that the radial cross section of the first annular portion 231 or the second annular portion 232 may be separately configured to be arched, which also improves the rigidity of the diaphragm 230. The ring shape in the diaphragm 230 may be circular, elliptical, polygonal, rounded rectangular, etc., and the first and second ring portions 231 and 232 are provided in corresponding shapes, which are not limited herein.
In the specific arrangement of the second sound generating unit, referring to fig. 3, the second sound generating unit 300 is a microelectromechanical horn (MEMS speaker), a piezoelectric ceramic sound generating sheet, an electrostatic horn, or a flat plate horn. The second sound generating units 300 are compact in structure and small in occupied space, are convenient to assemble to one side of the magnetic circuit structure 210 of the first sound generating unit 200 or the periphery of the basin frame 210, realize integration of the second sound generating units 300 and the first sound generating unit 200, improve sound effects and reduce occupation of space by the loudspeaker.
When the frame and the first sound generating unit are disposed, referring to fig. 3, the ratio between the outer diameter of the frame 100 and the distance from the bottom surface of the magnetic circuit structure 210 to the bass vibration sound source surface 200a ranges from 1 to 9. The outer diameter of the frame 100 refers to the maximum diameter of the frame 100, i.e., the diameter of the outer edge of the frame 100. The bottom surface of the magnetic structure 210 refers to the surface of the magnetic structure 210 facing away from the diaphragm 230. The second sound generating unit 300 and the first sound generating unit 200 are coaxially arranged, the high-pitch vibration sound source surface 300a and the low-pitch vibration sound source surface 200a are arranged in a coplanar mode, the axial space is fully utilized, meanwhile, the requirements of high and low sounds are met, and the high-frequency response is improved.
In assembling the basin stand and the magnetic circuit structure, referring to fig. 3, the basin stand 100 has a through hole 102, and the magnetic circuit structure 210 is at least partially assembled in the through hole 102; the inner wall of the through hole 102 is provided with a blocking arm 103, and referring to fig. 2, the magnetic circuit structure 210 is provided with a limiting groove 216, and the blocking arm 103 is in clamping fit with the limiting groove 216 so as to limit the position of the magnetic circuit structure 210 relative to the basin frame 100. After the magnetic circuit structure 210 is assembled, the magnetic circuit structure 210 is inserted into the through hole 102 from the bottom end of the basin frame 100, and when the blocking arm 103 of the basin frame 100 is installed in the limiting groove 216 of the magnetic circuit structure 210, the blocking arm 103 blocks the magnetic circuit structure 210, so that the axial and circumferential positioning of the magnetic circuit structure 210 is realized. The magnetic circuit structure 210 and the basin stand 100 can be connected by bonding, clamping, tight fit or other modes.
For example, when the first magnetic circuit structure 210 is adopted, the edge of the cylindrical portion 2122 of the magnetic conduction seat 212, which is far away from the plate portion 2121, is provided with the limiting groove 216, and the edge of the through hole 102 of the basin stand 100, which is near to the diaphragm 230, is provided with the blocking arm 103. When the magnetic circuit structure 210 and the basin frame 100 are assembled, the blocking arm 103 is in clamping fit with the limiting groove 216, so that the magnetic circuit structure 210 and the basin frame 100 are axially positioned.
Referring to fig. 1 and fig. 8 to fig. 11, an embodiment of the present application provides an electronic device including the above-mentioned earphone. The electronic device may be, among other things, a mobile phone, a tablet computer, a smart phone, smart glasses, an AR (augmented reality)/VR (virtual reality) device, a hearing aid, a headset, a horn speaker, etc. The electronic device is an earphone, and the earphone comprises a head beam and two earphones, wherein the two earphones are arranged at two ends of the head beam in a one-to-one correspondence mode.
The electronic device adopts all the technical schemes of all the embodiments, so that the electronic device has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
Finally, it should be noted that: the foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (18)

1. An earphone, comprising: the earphone comprises a earphone shell, a basin frame, a first sound generating unit and a second sound generating unit;
the basin is arranged on the earphone shell;
the first sound generating unit comprises a magnetic circuit structure arranged on the basin frame, a vibrating diaphragm and a voice coil connected with the vibrating diaphragm, wherein the magnetic circuit structure is provided with an annular air gap, the vibrating diaphragm is spaced from the magnetic circuit structure, at least one part of the voice coil is accommodated in the annular air gap, and a bass vibration sound source surface is formed at the joint between the voice coil and the vibrating diaphragm;
the second sound producing unit is arranged on one side of the magnetic circuit structure facing the vibrating diaphragm or the periphery of the basin frame, and is provided with a high-pitch vibration sound source surface, and the high-pitch vibration sound source surface and the low-pitch vibration sound source surface face the same.
2. The earphone of claim 1, wherein the earphone housing is provided with an ear cup, the ear cup and the earphone housing enclose a front cavity, and the first sound generating unit and the second sound generating unit are both disposed toward the front cavity.
3. The earphone of claim 2, wherein the second sound producing unit is provided with a horn, the horn is located in the front cavity, the horn has a first end and a second end which are oppositely disposed, the first end is aligned with the periphery of the second sound producing unit, and the second end is disposed toward the sound producing direction of the second sound producing unit.
4. A headset as claimed in claim 3, wherein a grill frame is provided on the headset housing, the grill frame being covered on the diaphragm, the grill frame having a plurality of sound outlet holes for the sound of the first sound generating unit.
5. The earphone of claim 4, wherein the horn and the grill frame are integrally formed, the second end of the horn is connected to the grill frame, the first end of the horn is fixed to or abuts against the outer periphery of the second sound unit, and the edge of the grill frame is connected to the earphone shell.
6. The earphone of any one of claims 1 to 5, wherein the earphone housing comprises an annular spacer and a first rear housing; the front side surface of the annular partition plate and the bass vibration sound source surface face the same, and the basin stand is arranged at the inner hole of the annular partition plate;
the first rear shell is connected to the rear side surface of the annular partition plate, the first rear shell cover is arranged at the rear part of the first sound emitting unit, and the inner side surface of the first rear shell, the rear side surface of the annular partition plate and the rear side surface of the first sound emitting unit enclose a first rear cavity; the first rear shell is provided with a first resonance channel communicated with the first rear cavity;
The basin stand and/or the magnetic circuit structure are/is provided with ventilation holes, and the annular air gap is communicated with the first rear cavity through the ventilation holes.
7. The earphone of claim 6, wherein the earphone housing further comprises a second rear housing connected to the rear side of the annular partition, the inner side of the second rear housing, the rear side of the annular partition, and the outer side of the first rear housing enclosing a second rear cavity, the first rear cavity and the second rear cavity being in communication through the first resonant passage; the annular partition plate is provided with a through hole communicated with the front cavity and the second rear cavity.
8. The earphone of claim 7, wherein the second rear housing has one or more second resonant channels that communicate the second rear cavity with an external space.
9. The earphone of claim 8, wherein the second rear housing has a main channel and a plurality of sub channels, the main channel has opposite ends, one end of the main channel is communicated with the second rear cavity, the other end of the main channel is communicated with the plurality of sub channels, one end of the plurality of sub channels away from the main channel is respectively connected to the second rear housing and is communicated with an external space, and the main channel and each of the sub channels are respectively communicated to form one of the second resonance channels.
10. The earphone according to claim 8 or 9, wherein the volume of the second rear cavity is in the range of 4cm 3 To 16cm 3 。
11. Earphone according to claim 8 or 9, wherein the length of the second resonance channel ranges from 4mm to 20mm.
12. Earphone according to claim 8 or 9, wherein the cross-sectional area of the second resonance channel is in the range of 3mm 2 To 10mm 2 。
13. The earphone according to any one of claims 1 to 12, wherein the articulation frequency of the second articulation unit is greater than the articulation frequency of the first articulation unit.
14. The earphone according to any one of claims 1 to 13, wherein the second sound emitting unit is provided in one, the second sound emitting unit is mounted in a middle portion of a side of the magnetic circuit structure facing the diaphragm, and the second sound emitting unit is coaxially provided with the first sound emitting unit;
or the second sound generating unit is arranged on one side of the magnetic circuit structure facing the vibrating diaphragm, and the second sound generating unit and the first sound generating unit are eccentrically arranged;
or, the number of the second sounding units is plural, and the plural second sounding units are arranged around the periphery of the basin frame.
15. The earphone of any one of claims 1 to 14, wherein the magnetic circuit structure comprises a magnetically permeable base, a magnet, and a magnetically permeable plate mounted on the magnet; the magnet guide seat comprises a plate-shaped part and a cylindrical part connected to the outer edge of the plate-shaped part, the magnet is mounted on the plate-shaped part, the outer peripheral surface of the magnet and the outer peripheral surface of the magnet guide plate are spaced from the inner wall of the cylindrical part to form the annular air gap, an opening for the voice coil to extend in is formed at one end of the annular air gap, which is close to the magnet guide plate, and the cylindrical part is mounted on the basin frame;
or, the magnetic circuit structure comprises a magnetic conduction seat, an annular magnet and a magnetic conduction ring, wherein the magnetic conduction seat comprises a plate-shaped part and a columnar part connected to the middle part of the plate-shaped part, the annular magnet is installed on the plate-shaped part, the magnetic conduction ring is installed on the annular magnet, the inner peripheral surface of the annular magnet and the inner peripheral surface of the magnetic conduction ring are both spaced from the outer peripheral surface of the columnar part to form an annular air gap, one end of the annular air gap, which is close to the magnetic conduction ring, forms an opening for the voice coil to extend in, and the magnetic conduction seat is installed on the basin frame;
or, the magnetic circuit structure comprises a magnetic conduction seat, an inner ring magnet, an outer ring magnet, an inner ring magnetic conduction plate and an outer ring magnetic conduction plate, wherein the inner ring magnet and the outer ring magnet are coaxially arranged on the magnetic conduction seat at intervals, the inner ring magnetic conduction plate and the outer ring magnetic conduction plate are arranged on the inner ring magnet and the outer ring magnet in a one-to-one correspondence manner, the inner ring magnetic conduction plate and the outer ring magnetic conduction plate are spaced apart, an annular air gap is formed between an assembly formed by the inner ring magnet and the inner ring magnetic conduction plate and an assembly formed by the inner ring magnet and the inner ring magnetic conduction plate, one end of the annular air gap, which is close to the inner ring magnetic conduction plate, forms an opening for the voice coil to extend in, and the magnetic conduction seat is arranged on the basin frame.
16. The earphone of any one of claims 1 to 15, wherein the second sound emitting unit is a microelectromechanical horn, a piezoelectric ceramic sound emitting sheet, an electrostatic horn, or a flat panel horn.
17. The earphone of any one of claims 1 to 16, wherein the frame has a through hole, the magnetic structure being at least partially fitted within the through hole; the inner wall of the through hole is provided with a blocking arm, the magnetic circuit structure is provided with a limiting groove, and the blocking arm is matched with the limiting groove in a clamping way to limit the position of the magnetic circuit structure relative to the basin frame.
18. An electronic device comprising an earphone as claimed in any one of claims 1 to 17.
CN202210262397.6A 2022-03-16 2022-03-16 Earphone and electronic equipment Pending CN116805994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210262397.6A CN116805994A (en) 2022-03-16 2022-03-16 Earphone and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210262397.6A CN116805994A (en) 2022-03-16 2022-03-16 Earphone and electronic equipment

Publications (1)

Publication Number Publication Date
CN116805994A true CN116805994A (en) 2023-09-26

Family

ID=88078449

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210262397.6A Pending CN116805994A (en) 2022-03-16 2022-03-16 Earphone and electronic equipment

Country Status (1)

Country Link
CN (1) CN116805994A (en)

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