A headset

Abstract

The present application mainly relates to an earphone, wherein the movement shell is used to contact the user's skin, the transducer device enables the skin contact area of ​​the movement shell to generate bone conduction sound under the action of the transducer device, the diaphragm divides the accommodating cavity into a front cavity and a rear cavity, the movement shell is provided with a sound outlet hole connected to the rear cavity, and the diaphragm generates air-conducted sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer device and the movement shell; the movement shell is provided with a pressure relief hole connected to the front cavity and a sound tuning hole connected to the rear cavity, the pressure relief hole enables the front cavity to be connected to the external environment to reduce the blockage of the front cavity to the rear cavity, the sound tuning hole can destroy the high-pressure area of ​​the rear cavity, reduce the wavelength of the standing wave in the rear cavity, so that the peak resonant frequency of the air-conducted sound output to the outside of the earphone through the sound outlet hole is shifted to a high frequency, thereby improving the acoustic expressiveness of the air-conducted sound; and by arranging the pressure relief hole and the sound tuning hole adjacent to each other, the leakage sound output to the outside of the earphone through the pressure relief hole and the sound tuning hole respectively is coherently cancelled, thereby improving the sound leakage problem of the earphone.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a headset. Background Art

[0002] With the increasing popularity of electronic devices, electronic devices have become an indispensable social and entertainment tool in people's daily lives, and people's requirements for electronic devices are getting higher and higher. Take electronic devices such as headphones as an example, they not only need excellent wearing comfort, but also need to have bass diving, treble penetration and good battery life. Summary of the invention

[0003] An embodiment of the present application provides an earphone, which includes a movement module, the movement module includes a movement shell, a transducer and a diaphragm, the movement shell is used to contact the user's skin and form a accommodating cavity, the transducer is arranged in the accommodating cavity and connected to the movement shell, so that the skin contact area of ​​the movement shell generates bone conduction sound under the action of the transducer, the diaphragm is connected between the transducer and the movement shell, so as to separate the accommodating cavity into a front cavity close to the skin contact area and a rear cavity away from the skin contact area, the movement shell is provided with a sound outlet hole connected to the rear cavity, and the diaphragm generates air-conducted sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer and the movement shell; the movement shell is also provided with at least one pressure relief hole connected to the front cavity and at least one sound adjustment hole connected to the rear cavity, at least some of the pressure relief holes and at least some of the sound adjustment holes are respectively arranged adjacent to each other, and the spacing distance is less than or equal to 2 mm.

[0004] The beneficial effects of the present application are as follows: the earphones provided by the present application can output bone-conducted sound and air-conducted sound by arranging a diaphragm between the transducer device and the movement housing, thereby improving the acoustic performance of the earphones. Furthermore, the front cavity is connected to the external environment through the pressure relief hole to reduce the blockage of the front cavity to the rear cavity, thereby improving the acoustic performance of the air-conducted sound; the high-pressure area of ​​the rear cavity can be destroyed through the tuning hole connected to the rear cavity, thereby reducing the wavelength of the standing wave in the rear cavity, so that the peak resonant frequency of the air-conducted sound output to the outside of the earphone through the sound outlet hole is shifted to a high frequency, thereby improving the acoustic performance of the earphones. Furthermore, by arranging the pressure relief hole adjacent to the tuning hole, the leaked sound output to the outside of the earphone through the pressure relief hole and the tuning hole respectively can be coherently cancelled, thereby improving the sound leakage problem of the earphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0006] Figure 1 is a structural schematic diagram of an embodiment of a headset provided by the present application;

[0007] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of a movement module provided by the present application;

[0008] Figure 3 It is a schematic diagram comparing the frequency response curves of the earphones provided by the present application before and after the diaphragm is set;

[0009] Figure 4 is a schematic cross-sectional structure diagram of an embodiment of a movement housing provided by the present application;

[0010] Figure 5 is a schematic cross-sectional structural diagram of an embodiment of a transducer device provided by the present application;

[0011] Figure 6 is a schematic diagram of a partial cross-sectional structure of various embodiments of the diaphragm provided in the present application;

[0012] Figure 7 is a schematic diagram of a partial cross-sectional structure of a diaphragm provided by the present application;

[0013] Figure 8 It is a schematic diagram of the principle structure of various embodiments of the sound guide component provided by the present application;

[0014] Fig. 9 It is a schematic diagram of the top view of the structure of an embodiment of the acoustic resistance net provided by the present application;

[0015] Fig.10 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0016] Fig.11 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0017] Fig.12 It is a schematic diagram of the frequency response curve of air-conducted sound at the pressure relief hole of an earphone according to an embodiment of the present application;

[0018] Fig.13 It is a comparative schematic diagram of the sound pressure distribution of the front and rear cavities of the movement module provided by the present application with the tuning hole;

[0019] Fig.14 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0020] Fig.15 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0021] Fig.16It is a schematic diagram of the frequency response curve of the sound leakage of the movement module provided by this application;

[0022] Fig.17 It is a schematic diagram of the principle structure of an embodiment of a movement module provided by the present application;

[0023] Fig.18 It is a schematic diagram of the principle structure of an embodiment of a movement module provided by the present application;

[0024] Fig.19 It is a schematic diagram for comparing the frequency response curves of the air-conducted sound at the pressure relief holes before and after the connecting holes of the movement module provided by the present application;

[0025] Fig. 20 It is a structural schematic diagram of an embodiment of a coil support provided by the present application;

[0026] Fig.21 It is a schematic diagram of the principle structure of various embodiments of the movement module provided by the present application;

[0027] Fig. 22 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0028] Fig.23 It is a schematic diagram of the frequency response curve of the sound leakage of the movement module provided by this application;

[0029] Fig.24 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0030] Fig.25 It is a schematic diagram of the principle structure of various embodiments of the movement module provided by the present application;

[0031] Fig.26 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0032] Fig. 27 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0033] Fig.28 is a structural schematic diagram of an embodiment of a headset provided by the present application;

[0034] Fig.29 It is a schematic diagram of the principle structure of an embodiment of a movement module provided by the present application;

[0035] Fig.30 It is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0036] Fig.31It is a schematic diagram of the principle structure of an embodiment of a headset provided by the present application;

[0037] Fig.32 It is a schematic diagram of the exploded structure of an embodiment of a movement module provided by the present application;

[0038] Fig.33 It is a schematic diagram of the exploded structure of an embodiment of a movement module provided by the present application. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with the accompanying drawings and examples. It is particularly noted that the following examples are only used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0040] Reference to "embodiments" in this application means that specific features, structures or characteristics described in conjunction with the embodiments may be included in the embodiments of this application. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0041] Combination Figure 1 , the earphone 100 may include two core modules 10, two ear hook components 20 and a rear hanging component 30. Among them, the two ends of the rear hanging component 30 are respectively connected to one end of a corresponding ear hook component 20, and the other end of each ear hook component 20 away from the rear hanging component 30 is respectively connected to a corresponding core module 10. Further, the rear hanging component 30 can be set in a curved shape for winding around the back of the user's head, and the ear hook component 20 can also be set in a curved shape for hanging between the user's ear and head, thereby facilitating the wearing requirements of the earphone 100; and the core module 10 is used to convert electrical signals into mechanical vibrations so that the user can hear the sound through the earphone 100. In this way, when the earphone 100 is in a wearing state, the two core modules 10 are respectively located on the left and right sides of the user's head, and the two core modules 10 also press the user's head under the cooperation of the two ear hook components 20 and the rear hanging component 30, and the user can also hear the sound output by the earphone 100.

[0042] It should be noted that the earphone 100 may also be worn in other ways, for example, the ear hook component 20 covers or wraps around the user's ears, and the rear hanging component 30 spans over the top of the user's head, which are not listed here one by one.

[0043] Combination Figure 1, the earphone 100 may further include a main control circuit board 40 and a battery 50. The main control circuit board 40 and the battery 50 may be arranged in the storage compartment of the same ear hook component 20, or may be respectively arranged in the respective storage compartments of the two ear hook components 20. Furthermore, the main control circuit board 40 and the battery 50 may be electrically connected to the two movement modules 10 through corresponding wires, the former may be used to control the movement module 10 to convert electrical signals into mechanical vibrations, and the latter may be used to provide electrical energy to the earphone 100. Of course, the earphone 100 described in the present application may also include microphones such as microphones and pickups, and communication elements such as Bluetooth and NFC, which may also be connected to the main control circuit board 40 and the battery 50 through corresponding wires to achieve corresponding functions.

[0044] It should be noted that: the present application provides two movement modules 10, and both movement modules 10 can convert electrical signals into movement vibrations, mainly to facilitate the headset 100 to achieve stereo sound effects. Therefore, in other application scenarios where stereo requirements are not particularly high, such as hearing aids for hearing-impaired patients, live broadcast prompts for hosts, etc., the headset 100 can also be provided with only one movement module 10.

[0045] Based on the above-mentioned related description, the movement module 10 is used to convert the electrical signal into mechanical vibration when powered on, so that the user can hear the sound through the earphone 100. Generally speaking, the aforementioned mechanical vibration can act directly on the user's auditory nerve based on the principle of bone conduction and mainly through the user's bones and tissues as a medium, or it can act on the user's eardrum based on the principle of air conduction and mainly through the air as a medium, and then act on the auditory nerve. For the sound heard by the user, the former can be simply referred to as "bone conduction sound" and the latter can be simply referred to as "air conduction sound". Based on this, the movement module 10 can form bone conduction sound, air conduction sound, and can also form bone conduction sound and air conduction sound at the same time.

[0046] Combination Figure 2 and Figure 1 , the movement module 10 may include a movement housing 11 and a transducer 12. The movement housing 11 is connected to one end of the ear hook assembly 20 and is used to contact the user's skin. Furthermore, the movement housing 11 also forms a receiving cavity (not marked in the figure), and the transducer 12 is arranged in the aforementioned receiving cavity and connected to the movement housing 11. The transducer 12 is used to convert electrical signals into mechanical vibrations in the power-on state, so that the skin contact area (for example, the skin contact area) of the movement housing 11 can be made to be more sensitive to the vibration. Figure 4The front bottom plate 1161 shown in the figure can generate bone conduction sound under the action of the transducer 12. In this way, when the user wears the earphone 100, the transducer 12 converts the electrical signal into movement vibration to drive the aforementioned skin contact area to generate mechanical vibration, and the mechanical vibration then directly acts on the user's auditory nerve through the user's bones and tissues as a medium, so that the user can hear the bone conduction sound through the movement module 10.

[0047] Furthermore, the movement module 10 may also include a diaphragm 13 connected between the transducer device 12 and the movement housing 11, and the diaphragm 13 is used to separate the internal space of the movement housing 11 (that is, the above-mentioned accommodating chamber) into a front chamber 111 close to the above-mentioned skin contact area and a rear chamber 112 away from the aforementioned skin contact area. In other words, when the user wears the earphone 100, the front chamber 111 can be closer to the user than the rear chamber 112. Among them, the movement housing 11 is provided with a sound outlet 113 connected to the rear chamber 112, and the diaphragm 13 can generate air-conducted sound transmitted to the human ear through the sound outlet 113 during the relative movement of the transducer device 12 and the movement housing 11. In this way, the sound generated in the rear chamber 112 can be transmitted through the sound outlet 113, and then act on the user's eardrum through the air as a medium, so that the user can also hear the air-conducted sound through the movement module 10.

[0048] It should be noted that: Figure 2, when the transducer device 12 causes the skin contact area to move toward the direction close to the user's face, it can be simply regarded as bone conduction sound enhancement. At the same time, the part of the movement housing 11 opposite to the aforementioned skin contact area moves toward the direction close to the user's face, and the transducer device 12 and the diaphragm 13 connected thereto move toward the direction away from the user's face due to the relationship between the action force and the reaction force, so that the air in the rear cavity 112 is squeezed, corresponding to the increase in air pressure, and the result is that the sound transmitted through the sound outlet 113 is enhanced, which can be simply regarded as air conduction sound enhancement. Correspondingly, when the bone conduction sound weakens, the air conduction sound also weakens. Based on this, the bone conduction sound and air conduction sound generated by the movement module 10 in the present application have the same phase characteristics. Further, since the front cavity 111 and the rear cavity 112 are generally separated by structural parts such as the diaphragm 13 and the transducer device 12, the change law of the air pressure in the front cavity 111 is exactly opposite to the change law of the air pressure in the rear cavity 112. Based on this, the movement housing 11 can also be provided with a pressure relief hole 114 connected to the front cavity 111. The pressure relief hole 114 enables the front cavity 111 to be connected to the external environment, that is, air can freely enter and exit the front cavity 111. In this way, the change of air pressure in the rear cavity 112 can be as little as possible blocked by the front cavity 111, which can effectively improve the acoustic performance of the air-conducted sound generated by the movement module 10. Among them, the pressure relief hole 114 and the sound outlet hole 113 are staggered from each other, that is, the two are not adjacent to each other, so as to avoid the phenomenon of silencing due to the opposite phase between the two as much as possible.

[0049] As an example, the actual area of ​​the outlet end of the sound outlet hole 113 may be greater than or equal to 8 mm 2 , so that the user can hear more air-conducted sound. The actual area of ​​the inlet end of the sound outlet hole 113 may also be greater than or equal to the actual area of ​​the outlet end thereof.

[0050] It should be noted that: since the movement housing 11 and other structural parts have a certain thickness, the sound outlet hole 113, the pressure relief hole 114 and other through holes opened on the movement housing 11 have a certain depth, and then relative to the above-mentioned accommodating cavity, the above-mentioned through hole has an inlet end close to the above-mentioned accommodating cavity and an outlet end away from the above-mentioned accommodating cavity. Furthermore, the actual area of ​​the outlet end described in this application can be defined as the area size of the end face where the outlet end is located.

[0051] In the above manner, since the air-conducted sound and bone-conducted sound generated by the core module 10 originate from the same vibration source (that is, the transducer 12), and the phases of the two are the same, the sound heard by the user through the earphone 100 can be stronger, and the earphone 100 can also save more power, thereby extending the battery life of the earphone 100. In addition, by reasonably designing the structure of the core module 10, the air-conducted sound and the bone-conducted sound can cooperate with each other in the frequency band of the frequency response curve, so that the earphone 100 can have excellent acoustic expression in a specific frequency band. For example, the low frequency band of the bone-conducted sound is compensated by the air-conducted sound, and the mid-frequency band and mid-high frequency band of the bone-conducted sound are strengthened by the air-conducted sound.

[0052] It should be noted that in this application, the frequency range corresponding to the low frequency band can be 20-150Hz, the frequency range corresponding to the mid-frequency band can be 150-5kHz, and the frequency range corresponding to the high frequency band can be 5k-20kHz. Among them, the frequency range corresponding to the mid-low frequency band can be 150-500Hz, and the frequency range corresponding to the mid-high frequency band can be 500-5kHz.

[0053] Based on the above detailed description, and combined with Figure 3 , the skin contact area can generate bone conduction sound under the action of the transducer device 12, and the bone conduction sound has a frequency response curve accordingly. Wherein, the frequency response curve may have at least one resonance peak. Further, the peak resonance frequency of the resonance peak may satisfy the relationship: |f1-f2| / f1≤50%. In addition, the difference between the peak resonance intensity corresponding to f1 and the peak resonance intensity corresponding to f2 may be less than or equal to 5db. Wherein, f1 is the peak resonance frequency of the resonance peak when the diaphragm 13 is connected to the transducer device 12 and the movement housing 11, and f2 is the peak resonance frequency of the resonance peak when the diaphragm 13 is disconnected from any one of the transducer device 12 and the movement housing 11. In other words, |f1-f2| / f1 can be used to measure the influence of the diaphragm 13 on the transducer device 12 driving the skin contact area; wherein, the smaller the ratio, the smaller the influence. In this way, on the basis of not affecting the original resonance system of the movement module 10 as much as possible, the movement module 10 can synchronously output bone conduction sound and air conduction sound with the same phase by introducing the diaphragm 13, thereby improving the acoustic performance of the movement module 10 and making it more power-saving.

[0054] As an example, in combination Figure 3, this embodiment can mainly examine the offset of the low frequency band or the medium and low frequency band in the frequency response curve, that is, f1≤500Hz, so that the low frequency and medium and low frequency of the bone conduction sound are not affected as much as possible. Among them, the aforementioned offset can be less than or equal to 50Hz, that is, |f1-f2|≤50Hz, so that the diaphragm 13 does not affect the transducer 12 driving the above-mentioned skin contact area as much as possible. Furthermore, the aforementioned offset can be greater than or equal to 5Hz, that is, |f1-f2|≥5Hz, so that the diaphragm 13 has a certain structural strength and elasticity, reduces fatigue deformation during use, and thereby extends the service life of the diaphragm 13.

[0055] It should be noted that: Figure 3 In this embodiment, the skin contact area may be defined as having a first frequency response curve (eg Figure 3 The skin contact area has a second frequency response curve (for example, Figure 3 Further, for the frequency response curve described in the present application, the horizontal axis may represent frequency, and its unit is Hz; the vertical axis may represent intensity, and its unit is dB.

[0056] Combination Figure 4 and Figure 2 , the movement housing 11 may include a rear housing 115 and a front housing 116 connected to the rear housing 115. Among them, the rear housing 115 and the front housing 116 can be snapped together to form a receiving cavity for accommodating structural parts such as the transducer 12 and the diaphragm 13. Further, the front housing 116 is used to contact the user's skin to form a skin contact area of ​​the movement housing 11, that is, when the movement housing 11 contacts the user's skin, the front housing 116 is closer to the user than the rear housing 115. Based on this, the transducer 12 can be connected to the front housing 116 so that the transducer 12 drives the skin contact area of ​​the movement housing 11 to generate mechanical vibration. Further, the sound outlet 113 can be provided in the rear housing 115, and the pressure relief hole 114 can be provided in the front housing 116. The diaphragm 13 can be connected to the rear housing 115, or to the front housing 116, or to the joint between the rear housing 115 and the front housing 116.

[0057] As an example, the rear housing 115 may include a rear bottom plate 1151 and a rear cylindrical side plate 1152 connected in an integral manner, and one end of the rear cylindrical side plate 1152 away from the rear bottom plate 1151 is connected to the front housing 116. The sound outlet 113 may be provided in the rear cylindrical side plate 1152.

[0058] Furthermore, the inner side of the movement housing 11 may also be provided with an annular support 1153, for example, the annular support 1153 is provided at one end of the rear cylindrical side plate 1152 away from the rear bottom plate 1151. Figure 4 , taking the rear bottom plate 1151 as a reference, the annular support 1153 may be slightly lower than the end surface of the rear cylindrical side plate 1152 away from the rear bottom plate 1151. Figure 2 , in the vibration direction of the transducer device 12, the sound outlet hole 113 can be located between the annular support 1153 and the rear bottom plate 1151. Based on this, the cross-sectional area of ​​the sound outlet hole 113 can gradually decrease in the direction from the entrance end of the sound outlet hole 113 to its exit end (that is, the direction of the sound outlet hole 113 toward the sound guide channel 141 mentioned later), so that the annular support 1153 has sufficient thickness in the vibration direction of the transducer device 12, thereby increasing the structural strength of the annular support 1153. In this way, when the rear shell 115 is buckled with the front shell 116, the front shell 116 can press and fix the coil support 121 mentioned later on the annular support 1153. Further, the diaphragm 13 can be fixed on the annular support 1153, or pressed on the annular support 1153 by the coil support 121, and then connected to the movement shell 11.

[0059] As an example, the front housing 116 may include an integrally connected front bottom plate 1161 and a front cylindrical side plate 1162, and one end of the front cylindrical side plate 1162 away from the front bottom plate 1161 is connected to the rear housing 115. The area where the front bottom plate 1161 is located can be simply regarded as the skin contact area described in this application. Accordingly, the pressure relief hole 114 can be provided on the front cylindrical side plate 1162.

[0060] Combination Figure 5 and Figure 2 , the transducer device 12 may include a coil support 121, a magnetic circuit system 122, a coil 123 and a spring sheet 124. The coil support 121 and the spring sheet 124 are arranged in the front cavity 111. The central area of ​​the spring sheet 124 may be connected to the magnetic circuit system 122, and the peripheral area of ​​the spring sheet 124 may be connected to the movement housing 11 through the coil support 121 to suspend the magnetic circuit system 122 in the movement housing 11. Further, the coil 123 may be connected to the coil support 121 and extend into the magnetic gap of the magnetic circuit system 122.

[0061] As an example, the coil support 121 may include an annular main body 1211 and a first cylindrical support part 1212, and one end of the first cylindrical support part 1212 is connected to the annular main body 1211. Among them, the annular main body 1211 can be connected to the peripheral area of ​​the spring sheet 124, and the two can form an integral structure by means of a metal insert injection molding process. At this time, the annular main body 1211 can be connected to the front bottom plate 1161 by one or a combination of connection methods such as gluing and clamping. Further, the coil 123 is connected to the other end of the first cylindrical support part 1222 away from the annular main body 1211, so that the coil extends into the magnetic circuit system 122. At this time, a part of the diaphragm 13 can be connected to the magnetic circuit system 122, and the other part can be connected to at least one of the rear shell 115 and the front shell 116.

[0062] Further, the coil support 121 may also include a second cylindrical support portion 1213 connected to the annular main body portion 1211, the second cylindrical support portion 1213 surrounds the first cylindrical support portion 1212, and extends in the same direction as the first cylindrical support portion 1212 to the side of the annular main body portion 1211. Among them, the second cylindrical support portion 1213 and the annular main body portion 1211 can be connected to the front housing 116 together to increase the connection strength between the coil support 121 and the movement housing 11. For example: the annular main body portion 1211 is connected to the front bottom plate 1161, and at the same time, the second cylindrical support portion 1213 is connected to the second annular side plate 1152. Correspondingly, the second cylindrical support portion 1213 can be provided with an avoidance hole 1214 connected to the pressure relief hole 114 to prevent the second cylindrical support portion 1213 from blocking the connectivity between the pressure relief hole 114 and the front cavity 111. At this time, a part of the diaphragm 13 can be connected to the magnetic circuit system 122, and the other part can be connected to the other end of the second cylindrical bracket part 1213 away from the annular main body part 1211, and then connected to the movement housing 11. Based on this, after the movement module 10 is assembled, the other end of the second cylindrical bracket part 1213 away from the annular main body part 1211 can press and hold the other part of the diaphragm 13 on the annular support 1153.

[0063] It should be noted that the first cylindrical support portion 1212 and / or the second cylindrical support portion 1213 can be a continuous and complete structure in the circumferential direction of the coil support 121 to increase the structural strength of the coil support 121, or can be a partially discontinuous structure to avoid other structural components.

[0064] As an example, the magnetic circuit system 122 may include a magnetic shield 1221 and a magnet 1222, which cooperate to form a magnetic field. The magnetic shield 1221 may include a bottom plate 1223 and a cylindrical side plate 1224 that are integrally connected. Furthermore, the magnet 1222 is disposed in the cylindrical side plate 1224 and fixed on the bottom plate 1223. The side of the magnet 1222 that faces away from the bottom plate 1223 may be connected to the middle area of ​​the spring sheet 124 through a connector 1225, and the coil 123 extends into the magnetic gap between the magnet 1222 and the magnetic shield 1221. At this time, a portion of the diaphragm 13 may be connected to the magnetic shield 1221.

[0065] It should be noted that the magnet 1222 may be a magnet group formed by a plurality of sub-magnets. In addition, a magnetic conductive plate (not marked in the figure) may be provided on the side of the magnet 1222 away from the bottom plate 1223 .

[0066] Combination Figure 6 , Figure 5 and Figure 2 The diaphragm 13 may include a diaphragm body 131, and the diaphragm body 131 may include a first connection portion 132, a folded portion 133, and a second connection portion 134 that are integrally connected. The first connection portion 132 surrounds the transducer device 12 and is connected to the transducer device 12; the second connection portion 134 surrounds the periphery of the first connection portion 132 and is spaced apart from the first connection portion 132 in a direction perpendicular to the vibration direction of the transducer device 12; the folded portion 133 is located in the interval area between the first connection portion 132 and the second connection portion 134, and connects the first connection portion 132 and the second connection portion 134.

[0067] As an example, the first connection portion 132 can be provided in a cylindrical shape and can be connected to the magnetic cover 1221; the second connection portion 134 can be provided in an annular shape and can be connected to the other end of the second cylindrical bracket portion 1213 away from the annular main body portion 1211, and then connected to the movement housing 11. Figure 5 The connection point between the folded portion 133 and the first connection portion 132 may be lower than the end surface of the cylindrical side plate 1224 which is away from the bottom plate 1223 .

[0068] Furthermore, the folded portion 133 forms a recessed area 135 between the first connecting portion 132 and the second connecting portion 134, so that the first connecting portion 132 and the second connecting portion 134 can more easily move relative to each other in the vibration direction of the transducer device 12, thereby reducing the influence of the diaphragm 13 on the transducer device 12. Figure 2 , the recessed area 135 can be recessed toward the rear cavity 112. Of course, the recessed area 135 can also be recessed toward the front cavity 111, that is, Figure 2 The recessed areas 135 are shown to be recessed in opposite directions.

[0069] It should be noted that: the number of the recessed areas 135 can be multiple, for example, two or three, and they are spaced apart in the vertical direction of the vibration direction of the transducer device 12; the depth of each recessed area 135 in the vibration direction of the transducer device 12 can also be different. In this embodiment, the number of the recessed area 135 is one as an example for exemplary description.

[0070] As an example, the material of the diaphragm body 131 can be polycarbonate (PC), polyamide (PA), acrylonitrile butadiene styrene (ABS), polystyrene (PS), high impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenolic resin (Phenol Any one or a combination of polyurethane foam (PUF), urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF), polyarylate (PAR), polyetherimide (PEI), polyimide (PI), polyethylene naphthalate diformic acid glycol ester (PEN), polyetheretherketone (PEEK), silica gel, etc. Among them, PET is a thermoplastic polyester with good molding. The diaphragm made of it is often called Mylar film; PC has strong impact resistance and stable size after molding; PAR is an advanced version of PC, mainly for environmental protection considerations; PEI is softer than PET and has higher internal damping; PI is resistant to high temperatures, has a higher molding temperature, and takes a long time to process; PEN has high strength and is relatively hard, and its characteristics are that it can be painted, dyed, and plated; PU is often used in the damping layer or folding ring of composite materials, with high elasticity and high internal damping; PEEK is a newer material that is resistant to friction and fatigue. It is worth noting that composite materials can generally take into account the characteristics of multiple materials, such as the common double-layer structure (generally hot-pressed PU to increase internal resistance), three-layer structure (sandwich structure, with a damping layer PU, acrylic glue, UV glue, pressure-sensitive glue in the middle), and five-layer structure (two layers of film are bonded by double-sided tape, and the double-sided tape has a base layer, usually PET).

[0071] Furthermore, the diaphragm 13 may also include a reinforcement ring 136, and the hardness of the reinforcement ring 136 may be greater than the hardness of the diaphragm body 131. The reinforcement ring 136 may be provided in a ring shape, and its ring width may be greater than or equal to 0.4 mm, and its thickness may be less than or equal to 0.4 mm. Furthermore, the reinforcement ring 136 is connected to the second connection portion 134, so that the second connection portion 134 is connected to the movement housing 11 through the reinforcement ring 136. In this way, the structural strength of the edge of the diaphragm 13 is increased, thereby increasing the connection strength between the diaphragm 13 and the movement housing 11.

[0072] It should be noted that the reinforcing ring 136 is provided in an annular shape mainly to facilitate the adaptation of the annular structure of the second connecting portion 134; however, the reinforcing ring 136 can be a continuous complete ring or a discontinuous segmented ring in structure. Furthermore, after the movement module 10 is assembled, the other end of the second cylindrical bracket portion 1213 away from the annular main body portion 1211 can press the reinforcing ring 136 on the annular support 1153.

[0073] As an example, the first connection part 132 can be injection molded on the outer peripheral surface of the magnetic shield 1221, and the reinforcement ring 136 can also be injection molded on the second connection part 134 to simplify the connection method between the two and increase the connection strength between the two. Among them, the first connection part 132 can cover the cylindrical side plate 1224, and can also further cover the bottom plate 1223 to increase the contact area between the first connection part 132 and the magnetic circuit system 122, thereby increasing the bonding strength between the two. Similarly, the second connection part 134 can be connected to the inner annular surface and one end face of the reinforcement ring 136 to increase the contact area between the second connection part 134 and the reinforcement ring 136, thereby increasing the bonding strength between the two.

[0074] Combination Figure 6 , Figure 6 (a) to (d) mainly illustrate various structural deformations of the diaphragm body 131, and the main difference between them lies in the specific structure of the folded portion 133. Figure 6 In (a), the folded portion 133 may be provided in a symmetrical structure, and the connection points formed by the two ends of the folded portion 133 and the first connection portion 132 and the second connection portion 134 may also be coplanar, for example, the projections of the two connection points in the vibration direction of the transducer device 12 overlap. Figure 6 As for (b), the folded portion 133 may also be mostly arranged in a symmetrical structure, but the connection points formed by the two ends of the folded portion and the first connection portion 132 and the second connection portion 134 are not coplanar, for example, the projections of the two connection points in the vibration direction of the transducer device 12 are staggered. Figure 6In (c), the folded portion 133 may be provided in an asymmetric structure, but its two ends are coplanar with the connection points formed by the first connection portion 132 and the second connection portion 134. Figure 6 In (d), the folded portion 133 may be provided in an asymmetric structure, and the connection points formed by the two ends of the folded portion 133 and the first connection portion 132 and the second connection portion 134 are not coplanar.

[0075] Based on the above-mentioned relevant description, for the diaphragm 13, the diaphragm body 131 has a certain structural strength to ensure its basic structure, fatigue resistance and other properties. The softer the diaphragm body 131 is, the easier it is to elastically deform, and the smaller the impact on the transducer device 12. Based on this, the thickness of the diaphragm body 131 can be less than or equal to 0.2 mm; preferably, the thickness of the diaphragm body 131 can be less than or equal to 0.1 mm. Among them, the elastic deformation of the diaphragm body 131 can mainly occur in the folded portion 133. Therefore, the thickness of the folded portion 133 can be smaller than the thickness of other parts of the diaphragm body 131. Based on this, the thickness of the folded portion 133 can be less than or equal to 0.2 mm; preferably, the thickness of the folded portion 133 can be less than or equal to 0.1 mm. Among them, this embodiment takes the diaphragm body 131 as an equal-thickness structure as an example for exemplary description.

[0076] Combination Figure 7 , in the vibration direction of the transducer device 12, the recessed area 135 may have a depth H; in the direction perpendicular to the vibration direction of the transducer device 12, the recessed area 135 may have a half-depth width W1, and there may be a spacing distance W2 between the first connection portion 132 and the second connection portion 134. Among them, 0.2≤W1 / W2≤0.6, which can not only ensure the size of the deformable area on the folded portion 133, but also avoid structural interference between the folded portion 133 and the first connection portion 132 and / or the movement shell 11. Similarly, 0.2≤H / W2≤1.4, which can not only ensure the size of the deformable area on the folded portion 133, making it soft enough, but also avoid structural interference between the folded portion 133 and the first connection portion 132 and / or the movement shell 11, and avoid the folded portion 133 from being difficult to vibrate due to its excessive weight.

[0077] It should be noted that the half-depth width W1 refers to the width of the recessed area 135 at a depth of 1 / 2H.

[0078] Further, the folded portion 133 may include an integrally connected first transition section 1331, a second transition section 1332, a third transition section 1333, a fourth transition section 1334, and a fifth transition section 1335. Among them, one end of the first transition section 1331 and the second transition section 1332 may be connected to the first connection portion 132 and the second connection portion 134, respectively, and extend toward each other; one end of the third transition section 1333 and the fourth transition section 1334 are connected to the other end of the first transition section 1331 and the second transition section 1332, respectively, and two ends of the fifth transition section 1335 are connected to the other end of the third transition section 1333 and the fourth transition section 1334, respectively. At this time, the aforementioned transition sections are collectively arranged to form a recessed area 135. Among them, in the direction from the connection point between the first transition section 1331 and the first connection part 132 (for example, point 7A) to the reference position point (for example, point 7C) of the fold part 133 farthest from the first connection part 132, the angle between the tangent line (for example, dotted line TL1) of the first transition section 1331 toward the side of the recessed area 135 and the vibration direction of the transducer device 12 can gradually decrease; similarly, in the direction from the connection point between the second transition section 1332 and the second connection part 134 (for example, point 7B) to the aforementioned reference position point, the angle between the tangent line (for example, dotted line TL2) of the second transition section 1332 toward the side of the recessed area 135 and the vibration direction of the transducer device 12 can gradually decrease, so that the recessed area 135 can be recessed toward the rear cavity 112. Further, the angle between the tangent line (e.g., dotted line TL3) of the third transition section 1333 on the side facing the recessed area 135 and the vibration direction of the transducer 12 can remain unchanged or gradually increase; similarly, the angle between the tangent line (e.g., dotted line TL4) of the fourth transition section 1334 on the side facing the recessed area 135 and the vibration direction of the transducer 12 can remain unchanged or gradually increase. At this time, the fifth transition section 1335 can be set in an arc shape.

[0079] As an example, the fifth transition section 1335 may be configured to be in an arc shape, and the arc radius may be greater than or equal to 0.2 mm. Figure 6 In (a) or (b), the angle between the tangent line of the third transition section 1333 toward the side of the recessed area 135 and the vibration direction of the transducer 12 can be zero; similarly, the angle between the tangent line of the fourth transition section 1334 toward the side of the recessed area 135 and the vibration direction of the transducer 12 can be zero. In this case, the arc radius of the fifth transition section 1335 can be equal to half of the half-depth width W1 of the recessed area 135. Of course, combined with Figure 6In (c) or (d), the angle between the tangent line of the third transition section 1333 toward the side of the recessed area 135 and the vibration direction of the transducer 12 may be zero; and the angle between the tangent line of the fourth transition section 1334 toward the side of the recessed area 135 and the vibration direction of the transducer 12 may be a constant value greater than zero. In this case, the fourth transition section 1334 may be tangent to the fifth transition section 1335.

[0080] Furthermore, the projection length of the first transition section 1331 in the direction perpendicular to the vibration direction of the transducer device 12 can be defined as W3, the projection length of the second transition section 1332 in the aforementioned vertical direction can be defined as W4, and the projection length of the fifth transition section 1335 in the aforementioned vertical direction can be defined as W5, where 0.4≤(W3+W4) / W5≤2.5.

[0081] As an example, the first transition section 1331 and the second transition section 1332 can be respectively set in an arc shape. Among them, the arc radius R1 of the first transition section 1331 can be greater than or equal to 0.2mm, and the arc radius R2 of the second transition section 1332 can be greater than or equal to 0.3mm, so as to avoid excessive bending of the folded portion 133, thereby increasing the reliability of the diaphragm 13. Of course, in some other embodiments, the first transition section 1331 may include an arc section and a flat section connected to each other, the arc section is connected to the third transition section 1333, and the flat section is connected to the first connecting portion 132; the second transition section 1332 may also be similar to the first transition section 1331.

[0082] Based on the above detailed description, and combined with Figure 7 , the thickness of the diaphragm body 131 can be 0.1mm. Among them, optionally W1≥0.9mm, optionally 0.3mm≤H≤1.0mm; optionally W3+W4≥0.3mm. Further, when 0.3mm≤W3+W4≤1.0mm, optionally W2 or W5≥0.4mm; when 0.4mm≤W3+W4≤0.7mm, optionally W2 or W5≥0.5mm. In a specific embodiment, W2 or W5=0.4mm, W3=0.42mm, W4=0.45mm; H=0.55mm.

[0083] Combination Figure 7 and Figure 5, in the vibration direction of the transducer 12, the distance from the connection point (e.g., point 7A) between the folded portion 133 and the first connecting portion 132 to the outer end surface of the magnetic circuit system 122 away from the front cavity 111 can be defined as d1, and the distance from the central area of ​​the spring sheet 124 to the outer end surface of the magnetic circuit system 122 away from the front cavity 111 can be defined as d2, where 0.3≤d1 / d2≤0.8. At this time, since the size of the distance d2 can be relatively determined, the size of the distance d1 can be adjusted based on the distance d2, so as to adjust the specific position where the folded portion 133 is connected to the first connecting portion 132. Further, the distance from the geometric center of the magnet 1222 (e.g., point G) to the outer end surface of the magnetic circuit system 122 away from the front cavity 111 can be defined as d3, where 0.7≤d1 / d3≤2. At this time, since the size of the distance d3 can be relatively determined, the size of the distance d1 can also be adjusted based on the distance d3, so as to adjust the specific position where the folded portion 133 is connected to the first connecting portion 132. In this way, one end of the magnetic circuit system 122 can be connected to the movement housing 11 through the spring sheet 124 and the coil bracket 121, and the other end can be connected to the movement housing 11 through the diaphragm 13. That is, the spring sheet 124 and the diaphragm 13 can respectively fix the two ends of the magnetic circuit system 122 on the movement housing 11 in the vibration direction of the transducer device 12, so that the stability of the magnetic circuit system 122 can be greatly improved.

[0084] As an example, d1≥d3, in the vibration direction of the transducer 12, combined with Figure 2 , the sound hole 113 can be at least partially located between the above-mentioned connection point and the above-mentioned outer end surface. In this way, while increasing the stability of the magnetic circuit system 122 as much as possible, it is also possible to leave enough size for the volume of the back cavity 112 as much as possible to increase the acoustic performance of the movement module 10, and it is also possible to give the position and size of the sound hole 113 on the movement housing 11 as much as possible to give enough design space, so as to flexibly set the sound hole 113.

[0085] Based on the above description, combined with Figure 5 , taking the side of the bottom plate 1223 facing away from the cylindrical side plate 1224 as a reference, the distance d1 can also be regarded as the distance between the second connecting portion 134 and the bottom plate 1223, the distance d2 can also be regarded as the distance between the spring sheet 124 and the bottom plate 1223, and the distance d3 can also be regarded as the distance between the geometric center of the magnet 1222 and the bottom plate 1223. In a specific embodiment, d1=2.85mm, d2=4.63mm, and d3=1.78mm are optional.

[0086] Further, the distance between the projections of the connection point between the first connection portion 132 and the folded portion 133 (e.g., point 7A) and the connection point between the second connection portion 134 and the folded portion 133 (e.g., point 7B) in the vibration direction of the transducer 12 can be defined as d4, where 0≤d4 / W2≤1.8. At this time, the specific position where the folded portion 133 is connected to the first connection portion 132 can also be adjusted. Figure 6 In (a) or (c), the connection point between the first connection portion 132 and the folded portion 133 and the connection point between the second connection portion 134 and the folded portion 133 can overlap in their projections in the vibration direction of the transducer 12, that is, d4=0. Figure 6 In (b) or (d), the connection point between the first connection part 132 and the fold part 133 (for example, point 7A) and the connection point between the second connection part 134 and the fold part 133 (for example, point 7B) can be staggered from each other in their projections in the vibration direction of the transducer device 12, that is, d4>0.

[0087] Combination Figure 8 and Figure 2 , the movement module 10 may also include a sound-conducting component 14 connected to the movement housing 11. Among them, the sound-conducting component 14 is provided with a sound-conducting channel 141, which is connected to the sound outlet 113 and is used to guide the above-mentioned air-conducted sound to the human ear. In other words, the sound-conducting component 14 can be used to change the propagation path / direction of the aforementioned air-conducted sound, thereby changing the directivity of the aforementioned air-conducted sound; and can be used to shorten the distance between the sound outlet 113 and the human ear, thereby increasing the intensity of the aforementioned air-conducted sound. In addition, the sound-conducting component 14 can also allow the air-conducted sound to be further away from the rear end surface of the movement housing 11 relative to its skin contact area (for example, the area where the rear bottom plate 1151 is located) from the actual output position of the earphone 100, so as to improve the anti-phase cancellation caused by possible sound leakage at the rear bottom plate 1151 to the sound at the sound outlet 113. In this way, when the user wears the earphone 100, the user can better hear the aforementioned air-conducted sound.

[0088] Generally, in order to ensure the sound quality, the frequency response curve should be relatively flat over a wider frequency band, that is, the resonance peak needs to be at a higher frequency position as much as possible. Among them, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 has a resonance peak, and the peak resonance frequency of the resonance peak can be greater than or equal to 1kHz; preferably, the peak resonance frequency can be greater than or equal to 2kHz, so that the earphone 100 has a better voice output effect; more preferably, the peak resonance frequency can be greater than or equal to 3.5kHz, so that the earphone 100 has a better music output effect; the peak resonance frequency can be further greater than or equal to 4.5kHz.

[0089] Based on the above description, the sound guide channel 141 is connected to the back cavity 112 through the sound outlet hole 113, which can form a typical Helmholtz resonance cavity structure. Based on the Helmholtz resonance cavity model, the resonance frequency f and the volume V of the back cavity 112, the cross-sectional area S of the sound guide channel 141, the equivalent radius R and its length L can satisfy the relationship: f∝[S / (VL+1.7VR)] 1 / 2 Obviously, when the volume of the rear cavity 112 is constant, increasing the cross-sectional area of ​​the sound-conducting channel 141 and / or reducing the length of the sound-conducting channel 141 are both beneficial to increasing the resonance frequency, thereby moving the above-mentioned air-conducted sound to high frequencies as much as possible.

[0090] As an example, the length of the sound-conducting channel 141 may be less than or equal to 7 mm. Preferably, the length of the sound-conducting channel 141 may be between 2 mm and 5 mm. In the vibration direction of the transducer 12, the distance between the outlet end of the sound-conducting channel 141 and the rear end face of the movement housing 11 away from the skin contact area may be greater than or equal to 3 mm, thereby avoiding the anti-phase cancellation of the air-conducted sound at the outlet end of the sound-conducting channel 141 by the sound leakage generated by the rear end face of the movement housing 11.

[0091] As an example, the cross-sectional area of ​​the sound guide channel 141 may be greater than or equal to 4.8 mm 2 Preferably, the cross-sectional area of ​​the sound guide channel 141 may be greater than or equal to 8 mm 2 . Further, combined with Figure 2 The cross-sectional area of ​​the sound-guiding channel 141 can be gradually increased along the transmission direction of the air-conducted sound (that is, in the direction away from the sound outlet 113), so that the sound-guiding channel 141 can be arranged in a trumpet shape; and can extend toward the front housing 116 to facilitate guiding the air-conducted sound. Among them, the cross-sectional area of ​​the entrance end of the sound-guiding channel 141 can be greater than or equal to 10mm 2 Alternatively, the cross-sectional area of ​​the outlet end of the sound-conducting channel 141 may be greater than or equal to 15 mm 2 .

[0092] As an example, the ratio between the volume of the sound guide channel 141 and the volume of the rear cavity 112 may be between 0.05 and 0.9. The volume of the rear cavity 112 may be less than or equal to 400 mm 3 Preferably, the volume of the rear cavity 112 may be between 200 mm 3 Up to 400mm 3 between.

[0093] In a specific embodiment, the sound guiding channel 141 may be configured in a trumpet shape. The length of the sound guiding channel 141 may be 2.5 mm, and the cross-sectional areas of the inlet and outlet ends of the sound guiding channel 141 may be 15 mm, respectively. 2 , 25.3mm 2 Furthermore, the volume of the rear cavity 112 may be 350 mm 3 .

[0094] Combination Figure 8 , Figure 8 (a) to (e) mainly illustrate various structural deformations of the sound guide component 14, and the main difference between them lies in the specific structure of the sound guide channel 141. Figure 8 For (a) to (c), the sound guide channel 141 can be simply regarded as a bent arrangement; Figure 8 In (d) to (e), the sound guide channel 141 can be simply regarded as a straight-through setting. Obviously, the above-mentioned air-conducted sound will have certain differences depending on the structural differences of the sound guide channel 141. Specifically:

[0095] for Figure 8 In (a), the sound output direction of the sound guide channel 141 is directed toward the user's face, and the distance from the outlet end of the sound guide channel 141 to the rear end surface can be increased, thereby optimizing the directivity and intensity of the air-conducted sound.

[0096] for Figure 8 In (b), the sound output direction of the sound-conducting channel 141 points to the auricle of the user, so that the air-conducted sound is more easily collected by the auricle and enters the ear canal, thereby optimizing the intensity of the air-conducted sound.

[0097] for Figure 8 As for (c), the sound output direction of the sound guide channel 141 also points to the ear canal of the user, which can also optimize the intensity of the aforementioned air-conducted sound. At the same time, the outlet of the sound guide channel 141 adopts an oblique outlet, which makes the actual area of ​​the outlet of the sound guide channel 141 not limited by the cross-sectional area of ​​the sound guide channel 141, which is equivalent to increasing the cross-sectional area of ​​the sound guide channel 141, thereby facilitating the output of the aforementioned air-conducted sound.

[0098] for Figure 8 As for (d), the wall surface of the sound guiding channel 141 is a plane, which is convenient for demolding during the manufacturing process.

[0099] for Figure 8 As for (e), the wall surface of the sound-conducting channel 141 is a curved surface, which is conducive to achieving acoustic impedance matching between the sound-conducting channel 141 and the atmosphere, and further facilitates the output of the above-mentioned air-conducted sound.

[0100] It should be noted that the cross-sectional area of ​​a certain point of the sound-guiding channel 141 refers to the minimum area that can be intercepted when the sound-guiding channel 141 is intercepted through the point. Furthermore, a straight-through sound-guiding channel means that the entirety of the other end can be observed from either the inlet end or the outlet end of the sound-guiding channel 141. Figure 8 For the straight sound-guiding channel shown in (d) to (e), the length of the sound-guiding channel 141 can be calculated as follows: first determine the geometric center of the entrance end of the sound-guiding channel 141 (e.g., point 8A) and the geometric center of the exit end (e.g., point 8B); then connect the aforementioned geometric centers to form a line segment 8A-8B, and the length of the line segment can be simply regarded as the length of the sound-guiding channel 141. Accordingly, a curved sound-guiding channel refers to a channel where the entrance end and the exit end of the sound-guiding channel 141 cannot be observed from the other end or only a part of the other end can be observed. At this time, for example Figure 8 For the curved sound guiding channel shown in (a) to (c), the curved sound guiding channel can be divided into two or more straight sub-guiding channels, and the sum of the lengths of the straight sub-guiding channels is used as the length of the curved sound guiding channel. Figure 8 In (a) to (c), the geometric center of the surface where the middle bend is located (for example, points 8C1 and 8C2) is further determined, and then the aforementioned geometric centers are connected to form a line segment 8A-8C1-8B (or 8A-8C1-8C2-8B). The length of this line segment can be simply regarded as the length of the sound guiding channel 141.

[0101] Combination Figure 2 The outlet end of the sound-conducting channel 141 is generally covered with an acoustic impedance net 140, which can be used to adjust the acoustic impedance of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113, so as to weaken the peak resonance frequency of the resonance peak of the aforementioned air-conducted sound in the mid-high frequency band or the high frequency band, so that the frequency response curve is smoother and the listening effect is better; it can also separate the back cavity 112 from the outside to a certain extent, so as to increase the waterproof and dustproof performance of the movement module 10. Among them, the acoustic impedance of the acoustic impedance net 140 can be less than or equal to 260MKSrayls. Specifically, the porosity of the acoustic impedance net 140 can be greater than or equal to 13%; and / or, the pore size can be greater than or equal to 18μm.

[0102] As an example, in combination Fig. 9, the acoustic impedance net 140 can be woven from gauze wires, and factors such as the wire diameter and density of the gauze wires will affect the acoustic impedance of the acoustic impedance net 140. Based on this, every four intersecting gauze wires among the multiple gauze wires arranged longitudinally and transversely can be used to enclose a pore. Among them, the area of ​​the area enclosed by the center line of the gauze wire can be defined as S1, and the area of ​​the area actually enclosed by the edge of the gauze wire (that is, the pore) can be defined as S2; then the porosity can be defined as S2 / S1. Furthermore, the pore size can be expressed as the spacing between any two adjacent gauze wires, such as the side length of the pore.

[0103] Furthermore, the effective area of ​​a certain through hole or opening introduced in the following text of the present application can be defined as the product of its actual area and the porosity of the sound resistance net covered. For example: when the outlet end of the sound-guiding channel 141 is covered with a sound resistance net 140, the effective area of ​​the outlet end of the sound-guiding channel 141 is the product of the actual area of ​​the outlet end of the sound-guiding channel 141 and the porosity of the sound resistance net 140; and when the outlet end of the sound-guiding channel 141 is not covered with a sound resistance net 140, the effective area of ​​the outlet end of the sound-guiding channel 141 is the actual area of ​​the outlet end of the sound-guiding channel 141. Similarly, the effective areas of the outlet ends of the through holes such as the pressure relief holes and the sound adjustment holes mentioned in the following text can also be defined as the products of the actual areas and the corresponding porosities, which will not be repeated here.

[0104] Based on the above description, in addition to hearing the bone-conducted sound, the user mainly hears the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 and the sound-conducting channel 141, rather than the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114. Therefore, the effective area of ​​the outlet end of the sound-conducting channel 141 can be designed to be larger than that of the pressure relief hole 114.

[0105] Furthermore, the size of the pressure relief hole 114 will affect the smoothness of the exhaust of the front cavity 111, the difficulty of the vibration of the diaphragm 13, and thus the acoustic expression of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113. Therefore, when the effective area of ​​the outlet end of the sound-conducting channel 141 is constant, for example, the actual area of ​​the outlet end of the sound-conducting channel 141 and / or the porosity of the acoustic resistance net 140 are constant, in combination with the following table, adjusting the effective area of ​​the outlet end of the pressure relief hole 114, for example, the actual area of ​​the outlet end of the pressure relief hole 114 and / or the acoustic resistance of the acoustic resistance net 1140 covered thereon, can change the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113. Among them, the acoustic resistance of 0 in this application can be simply regarded as not being covered with an acoustic resistance net.

[0106] Frequency response curve <![CDATA[Actual area / mm 2 > Acoustic Resistance / MKSrayls Porosity 10-1 31.57 0 100％ 10-2 2.76 0 100％ 10-3 2.76 1000 3％

[0107] Combination Fig.10As the actual area of ​​the outlet end of the pressure relief hole 114 increases, the exhaust of the front cavity 111 becomes smoother, and the peak resonance intensity of the low frequency band or the mid-low frequency band increases significantly; as the sound resistance net 1140 is added to the outlet end of the pressure relief hole 114, the exhaust of the front cavity 111 is affected to a certain extent, so that the mid-low frequency of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 decreases, and the frequency response curve is relatively flat.

[0108] In combination with the following table, by adjusting the actual area of ​​the outlet end of the pressure relief hole 114 and the acoustic resistance of the acoustic resistance net 1140 provided on the upper cover, it is possible to achieve a combination of pressure relief holes 114 of different sizes and acoustic resistance nets 1140 of different acoustic resistances, thereby making the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 substantially consistent. Among them, if the acoustic resistance net 1140 with a porosity of 14% can be simply regarded as a single-layer net, then the acoustic resistance net 1140 with a porosity of 7% can be simply regarded as a double-layer net.

[0109]

[0110] Combination Fig.11 , the larger the actual area of ​​the outlet of the pressure relief hole 114, the larger the acoustic resistance of the corresponding acoustic resistance net should be, so that the effective area of ​​the outlet of the pressure relief hole 114 can be roughly consistent, so that the exhaust smoothness of the front cavity 111 is roughly the same, and then the frequency response curve of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 is roughly consistent. Fig.12 Although the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 is generally the same, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 is different, that is, the sound leakage at the pressure relief hole 114 is different. Among them, with the increase of the actual area of ​​the outlet end of the pressure relief hole 114 and the increase of the acoustic resistance of the acoustic resistance net 1140, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 moves downward as a whole, that is, the sound leakage at the pressure relief hole 114 is weakened accordingly. In other words, while ensuring that the frequency response curve of the air-conducted sound at the sound-conducting component 14 remains roughly unchanged, the size of the pressure relief hole 114 can be increased as much as possible, and at the same time, the acoustic resistance of the acoustic resistance net 1140 on the pressure relief hole 114 can be increased to make the sound leakage at the pressure relief hole 114 as small as possible. It can be seen that while ensuring that the effective area of ​​the outlet end of the pressure relief hole 114 is less than or equal to 2.76mm 2 On the premise of, the sound leakage at the pressure relief hole 114 can be reduced by increasing the actual area of ​​the outlet end of the pressure relief hole 114 and the porosity of the acoustic resistance net 1140.

[0111] It should be noted that: due to the limited size of the movement housing 11, a single pressure relief hole 114 cannot be too large. Based on this, the pressure relief hole 114 can be set to at least one or at least two, such as three as described below.

[0112] Based on the above detailed description, the effective area of ​​the outlet end of the sound guiding channel 141 may be larger than the effective area of ​​the outlet end of each pressure relief hole 114, so that the user can hear the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113. Wherein, based on the definition of the effective area, the actual area of ​​the outlet end of the sound guiding channel 141 may be larger than the actual area of ​​the outlet end of each pressure relief hole 114. Further, the effective area of ​​the outlet end of the sound guiding channel 141 may be greater than or equal to the sum of the effective areas of the outlet ends of all the pressure relief holes 114. Wherein, the ratio between the sum of the effective areas of the outlet ends of all the pressure relief holes 114 and the effective area of ​​the outlet end of the sound guiding channel 141 may be greater than or equal to 0.15. As an example, the effective area of ​​the outlet end of the full pressure relief holes 114 may be greater than or equal to 2.5mm 2 In this way, the front cavity 111 is ensured to exhaust smoothly, thereby facilitating the improvement of the acoustic performance of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 and reducing the sound leakage at the pressure relief hole 114 .

[0113] As an example, the actual area of ​​the outlet end of the sound guide channel 141 may be greater than or equal to 4.8 mm 2 Preferably, the actual area of ​​the outlet end of the sound guide channel 141 may be greater than or equal to 8 mm 2 Accordingly, the sum of the actual areas of the outlet ends of all the pressure relief holes 114 may be greater than or equal to 2.6 mm 2 Preferably, the actual area of ​​the outlet end of all the pressure relief holes 114 can be greater than or equal to 10 mm 2 When the number of the pressure relief hole 114 is one, the sum of the actual areas of the outlet ends of all the pressure relief holes 114 is the actual area of ​​the outlet end of one pressure relief hole 114; the sound adjustment hole 117 is similar. In a specific embodiment, the actual area of ​​the outlet end of the sound guide channel 141 can be 25.3mm 2 ; Three pressure relief holes 114 may be provided, such as the first pressure relief hole 1141, the second pressure relief hole 1142, and the third pressure relief hole 1143 mentioned later, and the actual area of ​​the outlet end thereof may be 11.4mm 2 、8.4mm 2 , 5.8mm 2 .

[0114] Further, the outlet end of the sound guide channel 141 may be covered with a sound resistance net 140, and the outlet end of at least part of the pressure relief hole 114 may be covered with a sound resistance net 1140. The porosity of the sound resistance net 1140 may be less than or equal to the porosity of the sound resistance net 140. In a specific embodiment, the porosity of the sound resistance net 140 may be greater than or equal to 13%, and the porosity of the sound resistance net 1140 may be greater than or equal to 7%.

[0115] Based on the above description, the sound guide channel 141 is connected to the back cavity 112 through the sound outlet hole 113, which can form a typical Helmholtz resonance cavity structure with a resonance peak. We can study the distribution of sound pressure in the back cavity 112 when the Helmholtz resonance cavity structure resonates. Fig.13 In (a), a high-pressure area far away from the sound outlet 113 and a low-pressure area close to the sound outlet 113 are formed in the rear cavity 112. Furthermore, when the Helmholtz resonance cavity structure resonates, it can be considered that a standing wave appears in the rear cavity 112. The wavelength of the standing wave corresponds to the size of the rear cavity 112. For example, the deeper the rear cavity 112 is, that is, the longer the distance between the low-pressure area and the high-pressure area is, the longer the wavelength of the standing wave is, resulting in a lower resonant frequency of the Helmholtz resonance cavity structure. Based on this, combined with Fig.13 In (b), by destroying the high-pressure area, for example, by setting a through hole in the high-pressure area that is connected to the back cavity 112, the sound originally reflected in the high-pressure area cannot be reflected, and thus the aforementioned standing wave cannot be formed. At this time, when the Helmholtz resonance cavity structure resonates, the high-pressure area in the back cavity 112 will move inward toward the low-pressure area, shortening the wavelength of the standing wave, thereby increasing the resonant frequency of the Helmholtz resonance cavity structure.

[0116] Combination Figure 2 , the movement housing 11 may also be provided with a sound-adjusting hole 117 connected to the rear cavity 112. Among them, under the same conditions, the sound-adjusting hole 117 is arranged in the high-pressure area in the rear cavity 112, which can most effectively destroy the high-pressure area. Of course, the sound-adjusting hole 117 can also be arranged in any area between the high-pressure area and the low-pressure area in the rear cavity 112. As an example, the sound-adjusting hole 117 can be arranged in the rear housing 115, and can be arranged on both sides of the transducer device 12 relative to the sound outlet hole 113 and its sound guide component 14.

[0117] Furthermore, combined with Fig.14 , the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 has a resonance peak. Combined with the following table, when the acoustic resistance net is not covered, the actual area of ​​the outlet of the tuning hole 117 can be adjusted to control the degree of damage to the above-mentioned high-pressure area by the tuning hole, thereby adjusting the peak resonance frequency of the resonance peak. Among them, the actual area of ​​the outlet of the tuning hole 117 is 0, which can be regarded as the tuning hole 117 is in a closed state.

[0118] Frequency response curve <![CDATA[Actual area / mm 2 > 14-1 0 14-2 1.7 14-3 2.8 14-4 28.44

[0119] Combination Fig.14, the larger the actual area of ​​the outlet end of the sound tuning hole 117, the more obvious the destructive effect on the above-mentioned high-pressure area, and the higher the peak resonance frequency of the resonance peak. Among them, the peak resonance frequency of the resonance peak when the sound tuning hole 117 is in the open state is shifted to the high frequency compared with the peak resonance frequency of the resonance peak when the sound tuning hole 117 is in the closed state, and the offset may be greater than or equal to 500Hz. Preferably, the aforementioned offset is greater than or equal to 1kHz. Furthermore, the peak resonance frequency of the resonance peak when the sound tuning hole 117 is in the open state may be greater than or equal to 2kHz, so that the earphone 100 has a better voice output effect. Preferably, the peak resonance frequency may be greater than or equal to 3.5kHz, so that the earphone 100 has a better music output effect; the peak resonance frequency may be further greater than or equal to 4.5kHz.

[0120] It should be noted that: due to the limited size of the movement housing 11, a single tuning hole 117 cannot be too large. Based on this, the tuning hole 117 can be set to at least one, for example, two as described below.

[0121] Similarly, in addition to hearing the bone-conducted sound, the user mainly hears the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113, rather than the air-conducted sound output to the outside of the earphone 100 through the sound adjustment hole 117. Therefore, the effective area of ​​the outlet end of the sound guide channel 141 can be designed to be larger than that of the sound adjustment hole 117.

[0122] Combination Fig.14 and Fig.13 Since the back cavity 112 is provided with the tuning hole 117, part of the sound leaks out from the tuning hole 117, that is, the tuning hole 117 forms a sound leakage, which causes the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 to move downward as a whole. Figure 2 , at least part of the outlet end of the sound-adjusting hole 117 may be covered with an acoustic resistance net 1170, so as to destroy the high-pressure area in the rear cavity 112 and prevent the sound from leaking out of the sound-adjusting hole 117 as much as possible. In combination with the following table, adjusting the effective area of ​​the outlet end of the sound-adjusting hole 117, such as the actual area of ​​the outlet end of the sound-adjusting hole 117 and / or the acoustic resistance of the acoustic resistance net 1170 covered thereon, can change the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113.

[0123] Frequency response curve Acoustic Resistance / MKSrayls 15-1 No tuning hole 15-2 0 15-3 145

[0124] Combination Fig.15, an acoustic resistance net 1170 is added to the outlet of the tuning hole 117, which can ensure that there is no significant reflected sound at the tuning hole 117 in the back cavity 112 (that is, no standing wave, non-hard sound field boundary), so that the high-pressure area in the back cavity 112 moves inward; it can also prevent sound from leaking out of the tuning hole 117 to a certain extent, so that more sound can be output to the outside of the earphone 100 through the sound outlet hole 113. Furthermore, the peak resonance intensity of the mid- and low-frequency bands is significantly increased, and the volume of the air-conducted sound is increased; the peak resonance intensity of the high-frequency band is also reduced to a certain extent, making the frequency response curve flatter in the high-frequency band and the sound quality of the high frequency more balanced.

[0125] Based on the above detailed description, the effective area of ​​the outlet end of the sound guiding channel 141 may be larger than the effective area of ​​the outlet end of each sound tuning hole 117, so that the user can hear the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113. Wherein, based on the definition of the effective area, the actual area of ​​the outlet end of the sound guiding channel 141 may be larger than the actual area of ​​the outlet end of each sound tuning hole 117. Further, the effective area of ​​the outlet end of the sound guiding channel 141 may be larger than the sum of the effective areas of the outlet ends of all the sound tuning holes 117. Wherein, the ratio between the sum of the effective areas of the outlet ends of all the sound tuning holes 117 and the effective area of ​​the outlet end of the sound guiding channel 141 may be greater than or equal to 0.08. As an example, the sum of the effective areas of the outlet ends of all the sound tuning holes 117 may be greater than or equal to 1.5mm 2 When there is only one sound-adjusting hole 117, the sum of the effective areas of the outlets of all the sound-adjusting holes 117 is the effective area of ​​the outlet of one sound-adjusting hole 117; the pressure relief hole 114 is similar. In this way, the peak resonance frequency of the resonance peak of the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 can be shifted to high frequency as much as possible, and the sound leakage at the sound-adjusting hole 117 can also be reduced.

[0126] As an example, the sum of the actual areas of the outlet ends of all the sound-tuning holes 117 may be greater than or equal to 5.6 mm 2 In a specific embodiment, two sound-adjusting holes 117 may be provided, such as the first sound-adjusting hole 1171 and the second sound-adjusting hole 1172 mentioned later, and the actual areas of the outlet ends thereof may be 7.6 mm 2 , 5.6mm 2 .

[0127] Further, the outlet end of the sound guide channel 141 may be covered with an acoustic resistance net 140, and the outlet end of at least part of the sound adjustment hole 117 may be covered with an acoustic resistance net 1170. The porosity of the acoustic resistance net 1170 may be less than or equal to the porosity of the acoustic resistance net 140. In a specific embodiment, the porosity of the acoustic resistance net 140 may be greater than or equal to 13%, and the porosity of the acoustic resistance net 1170 may be less than or equal to 16%.

[0128] Based on the above-mentioned related description, for the pressure relief hole 114 and the sound outlet hole 113, the phases of the air-conducted sounds outputted to the outside of the earphone 100 through the two holes are opposite, so that the pressure relief hole 114 and the sound outlet hole 113 should be staggered as much as possible in three-dimensional space to avoid the coherence and cancellation of the air-conducted sounds outputted to the outside of the earphone 100 through the two holes. To this end, the pressure relief hole 114 is as far away from the sound outlet hole 113 as possible. For the sound-adjusting hole 117 and the sound outlet hole 113, if the area where the sound outlet hole 113 is located can be simply regarded as the low-pressure area in the back cavity 112, then the area in the back cavity 112 farthest from the area where the sound outlet hole 113 is located can be simply regarded as the high-pressure area in the back cavity 112; and the sound-adjusting hole 117 can be preferably set in the high-pressure area in the back cavity 112 to destroy the original high-pressure area and move it to the low-pressure area. To this end, the sound-adjusting hole 117 is as far away from the sound outlet hole 113 as possible.

[0129] Furthermore, since the pressure relief hole 114 is connected to the front cavity 111, and the sound tuning hole 117 is connected to the back cavity 112, the phases of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound tuning hole 117 are opposite, so the sound leakage from the pressure relief hole 114 and the sound tuning hole 117 can be reduced by coherent cancellation. Based on this, at least part of the pressure relief holes 114 and at least part of the sound tuning holes 117 can be arranged adjacent to each other to create conditions for coherent cancellation. Among them, in order to better allow the sound leakage of the pressure relief hole 114 and the sound tuning hole 117 to coherently cancel each other, the spacing distance between the two should be as small as possible, for example, the minimum distance between the contours of the outlet ends of the pressure relief hole 114 and the sound tuning hole 117 is less than or equal to 2 mm. In addition, the peak resonance frequency and / or peak resonance intensity of the resonance peak of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound tuning hole 117 should also be matched as much as possible. However, in actual product design, due to the influence of specific structure and process tolerance, it is generally difficult to control the peak resonance frequency and / or peak resonance intensity of the resonance peaks of the above-mentioned two air-conducted sounds to be exactly the same. Therefore, in the design, it should be ensured as much as possible that the peak resonance frequency and / or peak resonance intensity of the resonance peaks of the above-mentioned two air-conducted sounds are not too different.

[0130] Combination Fig.16, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 has a first resonance peak f1, and the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the tuning hole 117 has a second resonance peak f2. In combination with the following table, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak can be greater than or equal to 2kHz, and |f1-f2| / f1≤60%. As the difference between the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak gradually decreases, the wider the bandwidth that can reduce the leakage sound, that is, the frequency response curve becomes relatively flatter, which is manifested as the sound leakage of the earphone 100 is reduced, that is, the effect of coherent cancellation of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the tuning hole 117 is better. Preferably, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak can be greater than or equal to 3.5k, and |f1-f2|≤2kHz. In this way, the air-conducted sounds output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 can be coherently cancelled in the high frequency band as much as possible.

[0131] Frequency response curve f1 peak resonant frequency / Hz Peak resonant frequency of f2 / Hz 16-1 3500 5600 16-2 4500 5600 16-3 5000 5600

[0132] Furthermore, since the coil support 121, the spring sheet 124 and other structural parts are arranged in the front cavity 111, the wavelength of the standing wave in the front cavity 111 is relatively long; the tuning hole 117 and the sound outlet hole 113 can destroy each other's high pressure area, so that the wavelength of the standing wave in the rear cavity 112 is relatively short. In this way, the peak resonance frequency of the first resonance peak is generally smaller than the peak resonance frequency of the second resonance peak. In order to make the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound tuning hole 117 respectively better coherently cancel each other, the peak resonance frequency of the first resonance peak should be shifted to high frequency as much as possible to be as close to the peak resonance frequency of the second resonance peak as possible. To this end, based on the Helmholtz resonance cavity model, the effective area of ​​the outlet end of the pressure relief hole 114 in the adjacent pressure relief hole 114 and the sound tuning hole 117 can be larger than the effective area of ​​the outlet end of the sound tuning hole 117. Among them, the ratio of the effective area of ​​the outlet end of the pressure relief hole 114 to the effective area of ​​the outlet end of the sound tuning hole 117 in the adjacent pressure relief holes 114 and the sound tuning holes 117 may be less than or equal to 2. As an example, the actual area of ​​the outlet end of the pressure relief hole 114 in the adjacent pressure relief holes 114 and the sound tuning holes 117 may be greater than the actual area of ​​the outlet end of the sound tuning hole 117. Further, the outlet ends of the adjacent pressure relief holes 114 and the sound tuning holes 117 may be covered with acoustic resistance nets 1140 and acoustic resistance nets 1170, respectively, and the porosity of the acoustic resistance net 1140 may be greater than the porosity of the acoustic resistance net 1170.

[0133] Combination Fig.17In (a), the pressure relief hole 114 may include a first pressure relief hole 1141 and a second pressure relief hole 1142. Among them, the first pressure relief hole 1141 can be arranged away from the sound outlet 113 compared with the second pressure relief hole 1142. At this time, the effective area of ​​the outlet end of the first pressure relief hole 1141 can be larger than the effective area of ​​the outlet end of the second pressure relief hole 1142. In this way, the size of the movement housing 11 and the exhaust demand of the front cavity 111 can be taken into account, and the first pressure relief hole 1141 with a relatively large exhaust volume can be as far away from the sound outlet 113 as possible, thereby reducing the influence of sound leakage at the pressure relief hole 114 on the air-conducted sound at the sound outlet 113. Further, the pressure relief hole 114 may also include a third pressure relief hole 1143, and the first pressure relief hole 1141 can also be arranged away from the sound outlet 113 compared with the third pressure relief hole 1143. Among them, the effective area of ​​the outlet end of the second pressure relief hole 1142 can be larger than the effective area of ​​the outlet end of the third pressure relief hole 1143.

[0134] As an example, in combination Fig.17 (a) and Figure 2 The sound outlet hole 113 and the first pressure relief hole 1141 may be located at opposite sides of the transducer device 12 ; and the second pressure relief hole 1142 and the third pressure relief hole 1143 may be arranged opposite to each other and may be located between the sound outlet hole 113 and the first pressure relief hole 1141 .

[0135] Furthermore, at least part of the outlet end of the pressure relief hole 114 may be covered with an acoustic resistance net 1140 to facilitate adjusting the effective area of ​​the outlet end of the pressure relief hole 114. Among them, this embodiment takes the outlet ends of the pressure relief hole 114 respectively covered with acoustic resistance nets 1140 of the same acoustic resistance as an example for exemplary description. In this way, not only can the acoustic performance and waterproof and dustproof performance of the earphone 100 be improved, but also the acoustic resistance net 1140 can be prevented from mixing due to too many specifications and types. Based on this, the actual area of ​​the outlet end of the pressure relief hole 114 can be adjusted to obtain the corresponding effective area. For example: the actual area of ​​the outlet end of the first pressure relief hole 1141 can be greater than the actual area of ​​the outlet end of the second pressure relief hole 1142, and the actual area of ​​the outlet end of the second pressure relief hole 1142 can also be greater than the actual area of ​​the outlet end of the third pressure relief hole 1143.

[0136] Combination Fig.17In (b), the sound tuning hole 117 may include a first sound tuning hole 1171 and a second sound tuning hole 1172. Among them, the first sound tuning hole 1171 can be arranged away from the sound outlet hole 113 compared with the second sound tuning hole 1172. At this time, the effective area of ​​the outlet end of the first sound tuning hole 1171 can be larger than the effective area of ​​the outlet end of the second sound tuning hole 1172, so as to destroy the high-pressure area in the back cavity 112. In this way, the size of the movement housing 11 and the need for the sound tuning hole 117 to destroy the high-pressure area of ​​the back cavity 112 can be taken into account, and the resonant frequency of the air-conducted sound at the sound outlet hole 113 can be made as high as possible, and the first sound tuning hole 1171 with a relatively large degree of destruction can be made as far away from the sound outlet hole 113 as possible.

[0137] As an example, in combination Fig.17 (b) and Figure 2 The sound outlet hole 113 and the first sound tuning hole 1171 may be located at opposite sides of the transducer device 12 ; and the second sound tuning hole 1172 may be located between the sound outlet hole 113 and the first sound tuning hole 1171 .

[0138] Furthermore, at least part of the outlet end cover of the sound tuning hole 117 may be provided with an acoustic resistance net 1170 to facilitate adjustment of the effective area of ​​the outlet end of the sound tuning hole 117. Among them, this embodiment is exemplified by taking the outlet ends of the sound tuning holes 117 respectively covered with acoustic resistance nets 1170 of the same acoustic resistance as an example. In this way, not only the acoustic performance and waterproof and dustproof performance of the earphone 100 can be improved, but also the mixing of the acoustic resistance net 1170 due to too many specifications and types can be avoided. Based on this, the actual area of ​​the outlet end of the sound tuning hole 117 can be adjusted to obtain the corresponding effective area. For example: the actual area of ​​the outlet end of the first sound tuning hole 1171 can be greater than the actual area of ​​the outlet end of the second sound tuning hole 1172. Specifically, the actual area of ​​the outlet end of the first sound tuning hole 1171 can be greater than or equal to 3.8mm 2 and / or, the actual area of ​​the outlet end of the second tuning hole 1172 may be greater than or equal to 2.8 mm 2 .

[0139] As an example, in combination Fig.17 In (c) and (d), the first pressure relief hole 1141 and the first sound tuning hole 1171 can be arranged adjacent to each other, and the second pressure relief hole 1142 and the second sound tuning hole 1172 can also be arranged adjacent to each other. In this way, the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 and the first sound tuning hole 1171 can be coherently canceled, and the air-conducted sound output to the outside of the earphone 100 through the second pressure relief hole 1142 and the second sound tuning hole 1172 can also be coherently canceled.

[0140] Furthermore, the effective area of ​​the outlet end of the first pressure relief hole 1141 can be larger than the effective area of ​​the outlet end of the first sound tuning hole 1171, so that the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 is shifted to high frequency as much as possible, so as to be as close as possible to the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the first sound tuning hole 1171, thereby making the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 and the first sound tuning hole 1171 respectively better coherently cancel each other. Similarly, the effective area of ​​the outlet end of the second pressure relief hole 1142 can be larger than the effective area of ​​the outlet end of the second sound tuning hole 1172, which will not be repeated here.

[0141] Similar to the sound-adjusting hole 117 destroying the high-pressure area in the rear cavity 112, the second pressure relief hole 1142 and the third pressure relief hole 1143 will destroy the high-pressure area in the front cavity 111, so that the wavelength of the standing wave in the front cavity 111 is reduced, thereby enabling the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 to shift to high frequency, so as to better coherently cancel the air-conducted sound output to the outside of the earphone 100 through the first sound-adjusting hole 1171. Among them, the offset can be greater than or equal to 500Hz, and the peak resonance frequency of the resonance peak can be greater than or equal to 2kHz. Preferably, the offset is greater than or equal to 1kHz. Similarly, the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the second pressure relief hole 1142 can also shift to high frequency. In short, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 disposed adjacent to the sound-adjusting hole 117 has a resonance peak, and the peak resonance frequency of the resonance peak when the other pressure relief holes 114 other than the pressure relief hole 114 disposed adjacent to the sound-adjusting hole 117 are in an open state is shifted toward a high frequency compared to the peak resonance frequency of the resonance peak when the other pressure relief holes 114 are in a closed state. The peak resonance frequency of the resonance peak when the other pressure relief holes 114 are in an open state may be greater than or equal to 2 kHz.

[0142] Combination Fig.17 and Figure 2, the core housing 11 may include a first side wall 17A and a second side wall 17B located on opposite sides of the transducer device 12, and a third side wall 17C and a fourth side wall 17D connecting the first side wall 17A and the second side wall 17B and spaced from each other. In short, the core housing 11 can be simplified as a rectangular frame. Of course, the third side wall 17C and the fourth side wall 17D can also be arranged in an arc shape so that the core housing 11 is arranged in a runway shape as a whole. Among them, the first side wall 17A is closer to the human ear than the second side wall 17B, and the third side wall 17C is closer to the ear hook assembly 20 than the fourth side wall 17D. Further, the sound outlet 113 can be arranged on the first side wall 17A, so that the user can hear the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 and the sound guide channel 141; the first pressure relief hole 1141 and the first sound adjustment hole 1171 can be respectively arranged on the second side wall 17B, so that they are respectively further away from the sound outlet 113. Correspondingly, the second pressure relief hole 1142 and the second sound adjustment hole 1172 can be respectively disposed on one of the third side wall 17C and the fourth side wall 17D, and the third pressure relief hole 1143 can be disposed on the other of the third side wall 17C and the fourth side wall 17D.

[0143] Based on the above description, combined with Fig.18 In (a), the exhaust of the air in the front chamber 111 needs to bypass the coil assembly, and its path can be as follows: Fig.18 As shown by the dotted arrow in (a), the wavelength of the standing wave in the front cavity 111 is relatively long, which is not conducive to the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 to shift to high frequency. To this end, in this embodiment, a connecting hole 1215 is provided on the coil assembly so that the air in the front cavity 111 can directly pass through the coil assembly during the discharge process. Fig.18 In (b), this can not only increase the exhaust efficiency of the front cavity 111, but also reduce the wavelength of the standing wave in the front cavity 111, thereby shifting the peak resonance frequency of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 to a high frequency.

[0144] Combination Fig.19 The frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 has a resonance peak, and the peak resonance frequency of the resonance peak when the connecting hole 1215 is in the open state is shifted to a high frequency compared to the peak resonance frequency of the resonance peak when the connecting hole 1215 is in the closed state, and the shift amount may be greater than or equal to 500 Hz. Among them, the peak resonance frequency of the resonance peak when the connecting hole 1215 is in the open state may be greater than or equal to 2 kHz.

[0145] As an example, the coil assembly is arranged in the front cavity 111 and extends into the magnetic gap of the magnetic circuit system 122. The coil assembly can be arranged in a ring shape and provided with a connecting hole 1215 connecting the inside and the outside of the coil assembly. Preferably, the connecting hole 1215 can be located outside the magnetic gap of the magnetic circuit system 122 to shorten the path of the air discharge in the front cavity 111 as much as possible.

[0146] Based on the above description, combined with Figure 5 The coil assembly described in this embodiment may include a coil support 121 and a coil 123 connected to the coil support 121, wherein the coil support 121 is used to fix the coil 123 on the movement housing 11 and allow the coil 123 to extend into the magnetic gap of the magnetic circuit system 122. The connecting hole 1215 may be provided on the coil support 121. Further, the connecting hole 1215 may be located on the side of the spring sheet 124 away from the skin contact area, so as to shorten the path of the air discharged from the front cavity 111 as much as possible.

[0147] Combination Fig. 20 The connecting hole 1215 can be located at the connection between the annular main body 1211 and the first cylindrical bracket part 1212. Of course, all the connecting holes 1215 can also be located at the annular main body 1211 or the first cylindrical bracket part 1212. Further, the number of connecting holes 1215 can be multiple, and they are arranged at intervals along the annular direction of the coil assembly. Among them, the cross-sectional area of ​​each connecting hole 1215 can be greater than or equal to 2mm 2 As an example, the cross-sectional area of ​​the connecting hole 1215 disposed adjacent to the first pressure relief hole 1141 may be greater than or equal to 3 mm. 2 The cross-sectional area of ​​the connecting hole 1215 disposed adjacent to the second pressure relief hole 1142 and the third pressure relief hole 1143 may be greater than or equal to 2.5 mm 2 .

[0148] Based on the above description, the air vibrations in the front cavity 111 and the rear cavity 112 are in opposite phases. Based on this, the movement module 10 may further include a connecting channel connecting the front cavity 111 and the rear cavity 112, so as to destroy the high pressure area in the front cavity 111 and the rear cavity 112, increase the peak resonance frequency of the resonance peak, and thus improve the sound quality and sound leakage of the earphone 100.

[0149] As an example, in combination Fig.21In (a), the communication channel can be a micropore array 21A provided on the diaphragm 13, for example, the micropore array 21A is provided on the folded portion 133. Among them, at least part of the micropores in the micropore array 21A and the sound outlet hole 113 can be respectively located on opposite sides of the transducer device 12. Of course, the micropore array 21A can also be provided on both sides of the sound outlet hole 113. Furthermore, the actual area of ​​each micropore in the micropore array 21A can be between 0.01mm 2 To 0.04mm 2 between.

[0150] Furthermore, the micro-hole array 21A can also cooperate with the sound-adjusting hole 117 to make the air-conducted sound output to the outside of the earphone 100 through the sound outlet hole 113 shift to high frequency.

[0151] Combination Fig. 22 As shown in the table below, the frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 has a resonance peak, and the peak resonance frequency of the resonance peak can be greater than or equal to 2kHz. Among them, the peak resonance frequency of the resonance peak when the communication channel is in the open state is shifted to a high frequency compared to the peak resonance frequency of the resonance peak when the communication channel is in the closed state, and the shift amount can be greater than or equal to 500Hz. Preferably, the shift amount can be greater than or equal to 1kHz. At the same time, combined with Fig.23 ,As the peak resonance frequency of the resonance peak shifts toward high frequencies, the sound leakage in the mid- and low-frequency bands is gradually reduced.

[0152]

[0153] Furthermore, an acoustic resistance net 21D may be provided on the communication path defined by the communication channel. Fig.24 As shown in the following table, by providing the acoustic impedance net 21D, the high-frequency peak in the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 and the sound guide channel 141 can be further weakened, so that the frequency response curve is flatter and the high-frequency sound quality is more balanced. As an example, the porosity of the acoustic impedance net 21D can be less than or equal to 18%; and / or the pore size can be less than or equal to 51 μm.

[0154] Frequency response curve Acoustic Resistance / MKSrayls Porosity 24-1 No connecting channel none 24-2 0 100％ 24-3 45 18％ 24-4 260 13％

[0155] As an example, in combination Fig.21 In (b), the communication channel may be a through hole 21B provided in the magnetic circuit system 122. The actual area of ​​the through hole 21B may be less than or equal to 9 mm 2 .

[0156] As an example, in combination Fig.21In (c), the communication channel can be a communication pipe 21C arranged outside the movement housing 11, and the communication pipe 21C is used to connect the pressure relief hole 114 and the sound adjustment hole 117. The pressure relief hole 114 and the sound adjustment hole 117 can be arranged adjacent to each other.

[0157] Based on the above-mentioned relevant description, the front cavity 111 and the rear cavity 112 can be simply regarded as a Helmholtz cavity structure, so that the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113, the pressure relief hole 114, and the sound adjustment hole 117 respectively has a resonance peak. Among them, any of the above embodiments mainly makes the peak resonance frequency of the resonance peak shift to the high frequency to improve the sound quality and sound leakage of the earphone 100. Furthermore, the peak resonance intensity of the air-conducted sound at the resonance peak will increase sharply, resulting in unbalanced sound quality. To this end, the movement module 10 can also include a Helmholtz resonance cavity 25A connected to the front cavity 111 and / or the rear cavity 112, so as to absorb the sound energy of the front cavity 111 and / or the rear cavity 112 near the peak resonance frequency, that is, to suppress the sudden increase of the peak resonance intensity, so that the frequency response curve is flatter, and the sound quality is more balanced.

[0158] As an example, in combination Fig.25 In (a), the Helmholtz resonance cavity 25A may be disposed in the movement housing 11 , for example, opposite to the skin contact area of ​​the movement housing 11 .

[0159] As an example, in combination Fig.25 In (b) to (d), the Helmholtz resonant cavity 25A can be arranged on the magnetic circuit system 122, for example, on the magnet 1222. Among them, since the mass of the magnetic circuit system 122 is larger than that of the movement housing 11, the amplitude of the magnetic circuit system 122 is smaller under the same driving force, especially in the medium and high frequency bands (for example, >1kHz). In other words, during the actual operation of the earphone 100, the vibration of the magnetic circuit system 122 is significantly smaller than that of the movement housing 11. Based on this, the Helmholtz resonant cavity 25A is arranged on the magnetic circuit system 122, and a wall with smaller vibration can be obtained, which absorbs sound energy and weakens the high-frequency peak more significantly.

[0160] Based on the Helmholtz cavity model, combined with Fig.26 , as the volume of the Helmholtz resonant cavity 25A (e.g. Fig.26 C) is increased, or the area of ​​the opening connecting the Helmholtz resonance cavity 25A and the front cavity 111 (or the rear cavity 112) is increased (for example Fig.26 The smaller the M) is, the wider the bandwidth of the Helmholtz resonance cavity 25A attenuating the high-frequency resonance peak is, and the more significant the attenuation effect is.

[0161] As an example, in combination Fig.25In (b), the Helmholtz resonance cavity 25A can be arranged to communicate with the rear cavity 112. The frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 has a first resonance peak, and the Helmholtz resonance cavity 25A is arranged to weaken the peak resonance intensity of the first resonance peak. The peak resonance frequency of the first resonance peak can be greater than or equal to 2kHz. Further, in combination with Fig.26 The difference between the peak resonance intensity of the first resonance peak when the opening of the Helmholtz resonance cavity 25A connected to the rear cavity 112 is in an open state and the peak resonance intensity of the first resonance peak when the opening of the Helmholtz resonance cavity 25A connected to the rear cavity 112 is in a closed state is greater than or equal to 3dB.

[0162] As an example, in combination Fig.25 In (c), the Helmholtz resonance cavity 25A can be arranged to communicate with the front cavity 111. The frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 has a second resonance peak, and the Helmholtz resonance cavity 25A is arranged to weaken the peak resonance intensity of the second resonance peak. The peak resonance frequency of the second resonance peak can be greater than or equal to 2kHz. Further, in combination with Fig.26 The difference between the peak resonance intensity of the second resonance peak when the opening of the Helmholtz resonance cavity 25A connected to the front cavity 111 is in an open state and the peak resonance intensity of the second resonance peak when the opening of the Helmholtz resonance cavity 25A connected to the front cavity 111 is in a closed state is greater than or equal to 3dB.

[0163] As an example, in combination Fig.25 In (d), the Helmholtz resonant cavity 25A may be configured to simultaneously connect the front cavity 111 and the rear cavity 112 , wherein the area of ​​the opening connecting the front cavity 111 may be greater than or equal to the area of ​​the opening connecting the rear cavity 112 .

[0164] Furthermore, the opening connecting the Helmholtz resonance cavity 25A and the front cavity 111 (or the rear cavity 112) may be provided with an acoustic resistance net 25B. Fig. 27 , as the acoustic resistance of the acoustic resistance net 25B (eg Fig. 27 The frequency response curve is flatter and the sound quality is more balanced. As an example, the porosity of the acoustic resistance mesh 25B can be greater than or equal to 3%.

[0165] Combination Fig.28The earphone 100 may include a processing circuit 28A, which may be integrated on the main control circuit board 40 and may be used to convert an audio file into a driving signal for the transducer 12. The audio file may be transmitted to the processing circuit 28A via a wired / wireless manner, and the processing circuit 28A may perform signal processing such as decoding, equalization, and gain adjustment on the audio file; the processed signal is further input to a speaker, which completes the conversion from the electrical signal to sound (such as bone conduction sound and / or air conduction sound), and then outputs the sound.

[0166] Based on the above-mentioned relevant description, the front cavity 111 and the rear cavity 112 can be simply regarded as a Helmholtz cavity structure, so that the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113, the pressure relief hole 114, and the sound adjustment hole 117 respectively has a resonance peak. Among them, any of the above embodiments mainly makes the peak resonance frequency of the resonance peak shift to the high frequency to improve the sound quality and sound leakage of the earphone 100. Furthermore, the peak resonance intensity of the air-conducted sound at the resonance peak will increase sharply, resulting in unbalanced sound quality. To this end, the processing circuit 28A may include at least one equalizer (EQ), and the equalizer may set the signal gain coefficient of the first frequency band of the audio file to be greater than the signal gain coefficient of the second frequency band, and the second frequency band is higher than the first frequency band, so as to weaken the signal amplitude of the relatively high frequency band, thereby reducing the signal output of the frequency, weakening the sudden increase of the air-conducted sound, and making the sound quality more balanced. Of course, the sudden increase of the bone-conducted sound can also be weakened to increase the balance. When the equalizer performs gain processing on the audio file, the signal gain coefficient is represented by a positive number, and when the equalizer performs attenuation processing on the audio file, the signal gain coefficient is represented by a negative number. Furthermore, the equalization function of the equalizer can be implemented by a filter; the filter can be a single one or a group of multiple modules, and the filter can be an analog filter or a digital filter.

[0167] As an example, the first frequency band may include at least 500 Hz.

[0168] As an example, the second frequency band may include at least 3.5 kHz or 4.5 kHz.

[0169] As an example, the air conduction sound output to the outside of the earphone 100 through the sound outlet 113 has a resonance peak, and the peak resonance frequency of the resonance peak is located in the second frequency band, or higher than the second frequency band. In this way, the resonance peak is shifted to the high frequency as much as possible, and its signal amplitude is weakened by the equalizer, thereby reducing the signal output of the second frequency, weakening the sudden increase of the air conduction sound, and making the high frequency of the sound quality more balanced.

[0170] As an example, the equalizer can further set different signal gain coefficients for the first frequency band according to the volume of the earphone 100. The louder the volume, the smaller the signal gain coefficient of the first frequency band. For example, when the volume is low, the equalizer can make the signal gain coefficient of the low frequency larger, so that the low frequency is sufficient, full, and the sound quality is good; and when the volume is high, the equalizer can make the signal gain coefficient of the low frequency smaller, so as to avoid distortion caused by excessive amplitude of the speaker.

[0171] Combination Fig.29 , the movement housing 11 may include a main housing 29A, an auxiliary housing 29B and an elastic connector 29C. Among them, the main housing 29A can be used to contact the user's skin and form a skin contact area. The transducer 12 can be connected to the main housing 29A, and the diaphragm 13 can be connected between the transducer 12 and the main housing 29A. At this time, the main housing 29A and the diaphragm 13 can cooperate to form a front cavity 111, and the auxiliary housing 29B can be connected to the main housing 29A through the elastic connector 29C, and can cooperate with the diaphragm 13 to form a rear cavity 112. Further, the vibration system formed by the auxiliary housing 29B and the elastic connector 29C has a natural frequency f0. At this time, the auxiliary housing 29B can be arranged relative to the skin contact area. Among them, the size of the natural frequency can be adjusted according to parameters such as the elastic coefficient of the auxiliary housing 29B and the elastic connector 29C, and is not limited here. Further, the natural frequency can be less than or equal to 2kHz. Preferably, the natural frequency can be less than or equal to 1kHz.

[0172] As an example, in combination Fig.30 , when the vibration frequency of the main shell 29A is between 20Hz and 150Hz, the phase difference between the auxiliary shell 29B and the main shell 29A can be between -π / 3 and +π / 3. At this time, the auxiliary shell 29B has a better follow-up performance relative to the main shell 29A, and the vibration of the auxiliary shell 29B and the skin contact area can even be in phase, and the air in the back cavity 112 can still be compressed or expanded, thereby forming air-conducted sound output to the outside of the earphone 100 through the sound outlet 113. Further, when the vibration frequency of the main shell 29A is between 2kHz and 4kHz, the phase difference between the auxiliary shell 29B and the main shell 29A can be between 2π / 3 and 4π / 3. At this time, the auxiliary shell 29B has a poor follow-up performance relative to the main shell 29A, and the vibration of the auxiliary shell 29B and the skin contact area can even be in reverse phase, and the air in the back cavity 112 is difficult to be compressed or expanded, thereby forming air-conducted sound output to the outside of the earphone 100 through the sound outlet 113.

[0173] In short, by reasonably designing the natural frequency of the auxiliary shell 29B, the earphone 100 can be controlled to form air-conducted sound that is output to the outside of the earphone 100 through the sound outlet 113 in a certain frequency band (for example, <f0), and the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 in another frequency band (for example, >f0) is significantly reduced, thereby using air-conducted sound to supplement the specific frequency band of bone-conducted sound.

[0174] Similarly, when the vibration frequency of the main housing 29A is between 20 Hz and 400 Hz, the phase difference between the auxiliary housing 29B and the main housing 29A can be between -π / 3 and +π / 3. Further, when the vibration frequency of the main housing 29A is between 1 kHz and 2 kHz, the phase difference between the auxiliary housing 29B and the main housing 29A can be between 2π / 3 and 4π / 3; but this frequency band needs to avoid the natural frequency of the auxiliary housing 29B.

[0175] Based on the above-mentioned related description, the skin contact area of ​​the movement housing 11 is used to contact the user's skin so as to transmit the mechanical vibration generated by the movement module 10, thereby forming bone conduction sound. Among them, while the earphone 100 generates bone conduction sound, the transducer 12 and the movement housing 11 move relative to each other. Further, due to the presence of the diaphragm 13, the aforementioned relative movement process will also cause the back cavity 112 to generate air conduction sound in phase with the bone conduction sound transmitted to the human ear through the sound outlet 113. Based on this, the mechanical properties of the user's skin (such as elasticity, damping, and mass) will in turn affect the vibration state of the movement module 10. Specifically, the better and tighter the movement housing 11 fits the user's skin, the weaker the vibration of the movement housing 11 will be. Correspondingly, the weakening of the vibration of the movement housing 11 weakens the relative movement between the movement housing 11 and the transducer 12 and the diaphragm 13, and the air conduction sound generated thereby also becomes smaller, ultimately affecting the listening effect of the air conduction sound. However, the movement housing 11 cannot be completely separated from the user's skin, because this will affect the transmission of bone-conducted sound, and further affect the listening effect of bone-conducted sound. For this reason, when the earphone 100 is in the wearing state, the first area 31A of the skin contact area is arranged to fit the user's skin, and the second area 31B of the skin contact area is inclined relative to the user's skin and arranged at intervals to take into account the generation of air-conducted sound and the transmission of bone-conducted sound. Among them, the second area 31B can be farther away from the ear hook assembly 20 than the first area 31A.

[0176] As an example, the inclination angle between the second area 31B and the user's skin may be between 0 degrees and 45 degrees. Preferably, the inclination angle may be between 10 degrees and 30 degrees.

[0177] As an example, the first area 31A and the second area 31B can be arranged on the same plane to reduce the difficulty of processing the movement housing 11. Of course, the movement housing 11 can also be arranged in an arc surface, so that the first area 31A is arranged to fit the user's skin while the second area 31B can be inclined and spaced relative to the user's skin.

[0178] As an example, the area of ​​the second region 31B may be larger than the area of ​​the first region 31A to ensure the generation of air-conducted sound.

[0179] Based on the above description, combined with Figure 2 and Fig.17 , the pressure relief hole 114 can make the front cavity 111 communicate with the outside of the earphone 100, and the sound adjustment hole 117 can make the rear cavity 112 communicate with the outside of the earphone 100; and at least part of the pressure relief holes 114 and at least part of the sound adjustment holes 117 can also be arranged adjacent to each other, and the distance between the two can be less than or equal to 2mm, for example, the first pressure relief hole 1141 is arranged adjacent to the first sound adjustment hole 1171, and the second pressure relief hole 1142 is arranged adjacent to the second sound adjustment hole 1172. Based on this, the movement module 10 can also include a protective cover 15, and the protective cover 15 can be arranged on the periphery of the pressure relief hole 114 and the sound adjustment hole 117. Among them, the protective cover 15 can be woven from metal wire, the wire diameter of the metal wire can be 0.1mm, and the mesh number of the protective cover 15 can be 90-100, so that it has a certain structural strength and good air permeability, so that foreign objects can be prevented from invading the interior of the movement module 10, and the acoustic performance of the earphone 100 can be not affected. In this way, the protective cover 15 can simultaneously cover the adjacent pressure relief hole 114 and the sound adjustment hole 117 , that is, “one cover covers two holes”, thereby greatly reducing materials and improving the appearance quality of the earphone 100 .

[0180] As an example, in combination Fig.32 , the outer surface of the core housing 11 may be provided with a receiving area 118, and the receiving area 118 may be connected to the outlet ends of the adjacent pressure relief hole 114 and the sound adjustment hole 117. At this time, the protective cover 15 may be provided in a plate shape, and may be fixed in the receiving area 118 by one or a combination of connection methods such as snap connection, adhesive connection, welding, etc., for example, adhesive connection or welding connection with the bottom of the receiving area 118 to cover the pressure relief hole 114 and the sound adjustment hole 117. Among them, the outer surface of the protective cover 15 may be flush with the outer surface of the core housing 11 or have an arc transition to improve the appearance quality of the earphone 100.

[0181] Furthermore, a boss 1181 may be formed in the accommodating area 118, and the boss 1181 is spaced apart from the side wall of the accommodating area 118 to form a accommodating groove 1182 surrounding the boss 1181. The groove width of the accommodating groove 1182 may be less than or equal to 0.3 mm. At this time, the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 are located at the top of the boss 1181, that is, the accommodating groove 1182 may surround the pressure relief hole 114 and the sound adjustment hole 117. Accordingly, the protective cover 15 may include a main cover plate 151 and an annular side plate 152, and the annular side plate 152 is connected to the edge of the main cover plate 151 by bending to extend laterally to the main cover plate 151. The height of the annular side plate 152 relative to the main cover plate 151 may be between 0.5 mm and 1.0 mm. In this way, when the protective cover 15 is fixed in the accommodating area 118, the annular side plate 152 can also be inserted and fixed in the accommodating groove 1182 to improve the connection strength between the protective cover 15 and the movement housing 11. For example, the annular side plate 152 is fixedly connected to the movement housing 11 through the colloid (not shown in the figure) in the accommodating groove 1182. Furthermore, the main cover plate 151 can also be connected to the top of the boss 1181 by welding. Among them, the top of the boss 1181 can be slightly lower than the outer surface of the movement housing 11, for example, the step difference between the two is approximately equal to the thickness of the main cover plate 151.

[0182] Based on the above description, combined with Fig.32 and Figure 2, the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 can also be covered with a sound resistance net 1140 and a sound resistance net 1170 respectively, so as to adjust the effective area of ​​the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 respectively, thereby improving the acoustic performance of the earphone 100. At this time, the sound resistance net 1140 and the sound resistance net 1170 can be first fixed on the top of the boss 1181 through the first annular film 1183, and the protective cover 15 can be subsequently fixed in the accommodating area 118. Among them, the first annular film 1183 surrounds the pressure relief hole 114 and the sound adjustment hole 117 to expose the outlet ends of the two. Furthermore, the main cover plate 151 can also be fixed on the sound resistance net 1140 and the sound resistance net 1170 through the second annular film 1184. Among them, the ring width of the first annular film 1183 and the second annular film 1184 can be between 0.4mm and 0.5mm, respectively, and the thickness can be less than or equal to 0.1mm, respectively. Of course, in some other embodiments, the acoustic resistance net 1140 and the acoustic resistance net 1170 can also be fixed on the protective cover 15 in advance to form a structural component, and then the structural component is fixed in the accommodating area 118. For example: the acoustic resistance net 1140 and the acoustic resistance net 1170 are fixed to the same side of the main cover plate 151 through the second annular film 1184, and are surrounded by the annular side plate 152, thereby forming a structural component with the protective cover 15. Among them, the acoustic resistance net 1140 and the acoustic resistance net 1170 can be at least partially staggered from each other, so as to cover the outlet ends of the adjacent pressure relief holes 114 and the sound adjustment holes 117, respectively, and to facilitate the adaptation of the spacing distance between the two.

[0183] It should be noted that: Figure 2 The end of the sound-conducting component 14 that faces away from the movement shell 11 can also be fixed with a sound-blocking net 140 and a corresponding protective cover 15 in the same or similar manner as any of the above-mentioned methods, so that the sound-blocking net 140 covers the outlet end of the sound-conducting channel 141 and is covered by the corresponding protective cover 15.

[0184] Combination Fig.33 and Figure 2 , the coil support 121 can be exposed from the side of the front housing 116 in a direction perpendicular to the buckling direction of the rear housing 115 and the front housing 116. In other words, Figure 4 For the front shell 116, the side of the front cylindrical side plate 1162 adjacent to the sound outlet hole 113 or the sound guide component 14 can be at least partially cut off to form a avoidance area for the exposed coil support 121. Furthermore, the sound guide component 14 can be snapped onto the exposed part of the coil support 121 and the outside of the rear shell 115, and the sound guide channel 141 is connected to the sound outlet hole 113. In this way, the side of the front shell 116 adjacent to the sound guide component 14 does not need to completely wrap the coil support 121, which can avoid the movement module 10 from being locally too thick, and does not hinder the fixation between the sound guide component 14 and the movement shell 11.

[0185] As an exemplary embodiment, the exposed portion of the coil support 121 and the outer side surface of the rear shell 115 can cooperate to form a boss 119. Among them, the boss 119 may include a first sub-boss portion 1191 located at the rear shell 115 and a second sub-boss portion 1192 located at the coil support 121. At this time, the sound outlet holes 113 can be entirely provided in the rear shell 115, and the outlet ends of the sound outlet holes 113 can be located at the top of the first sub-boss portion 1191. Correspondingly, a recessed area 142 can be provided on the side of the sound-conducting component 14 facing the coil support 121 and the rear shell 115. At this time, the inlet end of the sound-conducting channel 141 can be connected to the bottom of the recessed area 142. In this way, when the sound-conducting component 14 is assembled with the movement shell 11, the boss 119 can be embedded in the recessed area 142, and the sound-conducting channel 141 is connected to the sound outlet hole 113. Among them, combined with Figure 2 The height of the boss 119 and the depth of the recessed area 142 can satisfy the following relationship: when the top of the boss 119 abuts against the bottom of the recessed area 142, the end surface of the sound guide component 14 is in contact with the movement housing 11, or there is a gap between the two, so as to improve the airtightness between the sound guide channel 141 and the sound outlet hole 113. Based on this, an annular seal (not shown in the figure) can also be set between the top of the boss 119 and the bottom of the recessed area 142.

[0186] Further, one of the rear housing 115 and the sound guide component 14 may be provided with a socket 1154; correspondingly, the other may be provided with a socket post 143. The socket post 143 may be inserted and fixed in the socket 1154 to improve the accuracy and reliability of the assembly of the sound guide component 14 and the movement housing 11. As an example, the socket 1154 is provided in the rear housing 115, specifically, it may be located in the first sub-boss portion 1191; the socket post 143 is provided in the sound guide component 14, specifically, it may be located in the recessed area 142.

[0187] It should be noted that: Fig.33 The sound guide component 14 and the movement housing 11 can be along Fig.33 Assemble in the direction shown by the dotted line.

[0188] In some embodiments, for example, the movement module 10 is not provided with a diaphragm 13, and the front housing 116 can press the coil support 121 on the annular support platform 1153 to improve the reliability of the assembly of the movement module 10. Specifically, the front housing 116 can press the other end of the second cylindrical support portion 1213 away from the annular main body portion 1211 on the annular support platform 1153.

[0189] In some other embodiments, for example, the movement module 10 is provided with a diaphragm 13, and the front housing 116 can hold the coil support 121 and the diaphragm 13 connected thereto together on the annular support platform 1153 to improve the reliability of the assembly of the movement module 10. The diaphragm 13 can be connected to the other end of the second cylindrical support portion 1213 away from the annular main body portion 1211 through its reinforcement ring 136. Specifically, the front housing 116 can hold the reinforcement ring 136 on the annular support platform 1153 through the second cylindrical support portion 1213.

[0190] As an example, in combination Fig.33 and Figure 4 , the sound-adjusting hole 117 can be provided in the rear housing 115 in the form of a complete through hole; and the pressure relief hole 114 can be provided in the front housing 116 in the form of an incomplete notch, and a complete through hole is formed by splicing the rear housing 115 and the front housing 116. In this way, it is convenient to reduce the spacing distance between the adjacent pressure relief holes 114 and the sound-adjusting hole 117, and it is convenient to make the actual area of ​​the outlet end of the pressure relief hole 114 larger than the actual area of ​​the outlet end of the sound-adjusting hole 117.

[0191] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A headset, characterized in that: The earphone comprises a movement module, the movement module comprises a movement housing, a transducer and a diaphragm, the movement housing is used to contact with the user's skin and form a receiving cavity, the movement housing comprises a rear housing and a front housing surrounding the receiving cavity, the transducer is arranged in the receiving cavity and connected to the movement housing, so that the skin contact area of ​​the movement housing generates bone conduction sound under the action of the transducer, the diaphragm is connected between the transducer and the movement housing, so as to separate the receiving cavity into a front cavity close to the skin contact area and a rear cavity away from the skin contact area, the movement housing is provided with a sound outlet hole connected to the rear cavity, and the diaphragm generates air conduction sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer and the movement housing; The movement housing is also provided with at least one pressure relief hole communicating with the front cavity and at least one sound adjustment hole communicating with the rear cavity, and at least part of the pressure relief holes and at least part of the sound adjustment holes are respectively arranged adjacent to each other, and the spacing distance is less than or equal to 2 mm.

2. The earphone according to claim 1, characterized in that Among the pressure relief holes and the sound adjustment holes that are adjacently arranged, the effective area of ​​the outlet end of the pressure relief hole is larger than the effective area of ​​the outlet end of the sound adjustment hole.

3. The earphone according to claim 2, characterized in that The actual area of ​​the outlet end of the pressure relief hole and the sound tuning hole arranged adjacently is larger than the actual area of ​​the outlet end of the sound tuning hole; and / or, the outlet ends of the pressure relief hole and the sound tuning hole arranged adjacently are respectively covered with a first sound resistance net and a second sound resistance net, and the porosity of the first sound resistance net is greater than the porosity of the first sound resistance net.

4. The earphone according to claim 2, characterized in that The at least one pressure relief hole includes a first pressure relief hole and a second pressure relief hole, the first pressure relief hole is arranged farther from the sound outlet hole than the second pressure relief hole, and the effective area of ​​the outlet end of the first pressure relief hole is larger than the effective area of ​​the outlet end of the second pressure relief hole, the at least one sound tuning hole includes a first sound tuning hole and a second sound tuning hole, the first sound tuning hole is arranged farther from the sound outlet hole than the second sound tuning hole, and the effective area of ​​the outlet end of the first sound tuning hole is larger than the effective area of ​​the outlet end of the second sound tuning hole, the first pressure relief hole is arranged adjacent to the first sound tuning hole, and the second pressure relief hole is arranged adjacent to the second sound tuning hole.

5. The earphone according to claim 4, characterized in that: The actual area of ​​the outlet end of the first sound tuning hole is greater than the actual area of ​​the outlet end of the second sound tuning hole.

6. The earphone according to claim 4, characterized in that The movement housing includes a first side wall and a second side wall located on opposite sides of the transducer device, and a third side wall and a fourth side wall connecting the first side wall and the second side wall and spaced apart from each other, the sound outlet hole is arranged on the first side wall, the first pressure relief hole and the first sound adjustment hole are arranged on the second side wall, and the second pressure relief hole and the second sound adjustment hole are arranged on one of the third side wall and the fourth side wall.

7. The earphone according to claim 6, characterized in that The at least one pressure relief hole further includes a third pressure relief hole, the effective area of ​​the outlet end of the second pressure relief hole is larger than the effective area of ​​the outlet end of the third pressure relief hole, and the third pressure relief hole is disposed on the other of the third side wall and the fourth side wall.

8. The earphone according to claim 7, characterized in that: The actual area of ​​the outlet end of the first pressure relief hole is greater than the actual area of ​​the outlet end of the second pressure relief hole, and the actual area of ​​the outlet end of the second pressure relief hole is greater than the actual area of ​​the outlet end of the third pressure relief hole.

9. The earphone according to claim 4, characterized in that: The movement module also includes a sound-conducting component connected to the movement housing, the sound-conducting component is provided with a sound-conducting channel, the sound-conducting channel is connected to the sound outlet hole, and is used to guide the air-conducted sound to the human ear, and the effective area of ​​the outlet end of the sound-conducting channel is greater than the effective area of ​​the outlet end of each of the pressure relief holes.

10. The earphone according to claim 9, characterized in that The effective area of ​​the outlet end of the sound-conducting channel is greater than or equal to the sum of the effective areas of the outlet ends of all the pressure relief holes.

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