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 conduction sound transmitted to the human ear through the sound outlet hole during the relative movement of the transducer device and the movement shell, so that the earphone can output bone conduction sound and air conduction sound, thereby improving the acoustic expression of the earphone; the movement module includes a partition and an auxiliary device, the partition is arranged in the rear cavity, the transducer device is located on the side of the partition facing the front cavity, the partition divides the rear cavity into a first sub-rear cavity arranged close to the front cavity and a second sub-rear cavity arranged away from the front cavity, the sound outlet hole is connected to the first sub-rear cavity, and the auxiliary device is arranged in the second sub-rear cavity, so that the function of the earphone can be expanded by the auxiliary device, and the auxiliary device can be prevented from affecting the air conduction sound 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 chamber, the transducer is arranged in the accommodating chamber 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 chamber into a front chamber close to the skin contact area and a rear chamber away from the skin contact area, the movement shell is provided with a sound outlet hole connected to the rear chamber, 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 module also includes a partition and an auxiliary device, the partition is arranged in the rear chamber, the transducer is located on the side of the partition facing the front chamber, the partition divides the rear chamber into a first sub-rear chamber arranged close to the front chamber and a second sub-rear chamber arranged away from the front chamber, the sound outlet hole is connected to the first sub-rear chamber, and the auxiliary device is arranged in the second sub-rear chamber.

[0004] The beneficial effect of the present application is that the earphone 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 earphone. Furthermore, the function of the earphone is expanded by auxiliary devices, and the auxiliary devices in the back cavity are separated by a partition to prevent the auxiliary devices from affecting the air-conducted sound of the earphone, thereby improving the acoustic performance of the earphone. 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 2It 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.16 It is a schematic diagram of the frequency response curve of the sound leakage of the movement module provided by this application;

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

[0024] Fig.19 It is a schematic diagram of the exploded structure of an embodiment of a movement module provided by the present application;

[0025] Fig. 20 It is a schematic cross-sectional structure diagram of an embodiment of a movement module provided by the present application;

[0026] Fig.21 It is a schematic cross-sectional structure diagram of an embodiment of a movement module provided by the present application;

[0027] Fig. 22 It is a schematic diagram of the exploded structure of an embodiment of an ear hook assembly provided by the present application;

[0028] Fig.23 yes Fig. 22 A partial cross-sectional diagram of the middle ear hook assembly;

[0029] Fig.24 yes Fig.23 A schematic diagram of the local enlarged structure of the middle A area;

[0030] Fig.25 It is a schematic diagram of the exploded structure of an embodiment of a rear hanging assembly provided by the present application;

[0031] Fig.26 yes Fig.25 A schematic diagram of the local enlarged structure of the middle B area;

[0032] Fig. 27 yes Fig.25 A schematic diagram of the structure of the metal connector in contact with the wire side;

[0033] Fig.28 yes Fig.25 A partial cross-sectional diagram of the center rear suspension assembly;

[0034] Fig.29 It is a structural schematic diagram of an embodiment of a coil support provided in the present application. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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 4 The 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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 .

[0062] 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.

[0063] 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 .

[0064] 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 shown are recessed in opposite directions.

[0065] 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.

[0066] 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).

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] Based on the above detailed description, 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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 .

[0088] 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.

[0089] 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 .

[0090] 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:

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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％

[0103] 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.

[0104] 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.

[0105]

[0106] 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.

[0107] 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.

[0108] 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 .

[0109] 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 .

[0110] 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%.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] Frequency response curve <![CDATA[Actual area / mm 2 > 14-1 0 14-2 1.7 14-3 2.8 14-4 28.44

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] Frequency response curve Acoustic Resistance / MKSrayls 15-1 No tuning hole 15-2 0 15-3 145

[0120] 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.

[0121] 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.

[0122] As an example, the sum of the actual areas of the outlet ends of all the 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 .

[0123] 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%.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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

[0128] 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.

[0129] 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.

[0130] 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 .

[0131] 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.

[0132] 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.

[0133] 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 .

[0134] 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 2.8mm 2 .

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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 .

[0140] As an example, in combination Fig.18, 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.

[0141] 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.

[0142] Based on the above description, combined with Fig.18 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.

[0143] 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.

[0144] Combination Fig.19 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.

[0145] 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.

[0146] 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.

[0147] It should be noted that: Fig.19 The sound guide component 14 and the movement housing 11 can be along Fig.19 Assemble in the direction shown by the dotted line.

[0148] 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.

[0149] 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.

[0150] As an example, in combination Fig.19 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.

[0151] Furthermore, combined with Fig.29 and Figure 2 A connecting hole 1215 may be provided at the connection between the annular main body 1211 and the first cylindrical support portion 1212, so that the air in the front cavity 111 does not need to bypass the coil support 121 and the coil 123 during the exhaust process, but directly passes through the coil support 121. 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 causing 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. Of course, the connecting holes 1215 may also all be located in the annular main body 1211 or the first cylindrical support portion 1212. Furthermore, the number of the connecting holes 1215 may 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 may be greater than or equal to 2 mm 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 .

[0152] Combination Figure 1 The earphone 100 may include two core modules 10, and the two core modules 10 may be located on the left and right sides of the user's head when the earphone 100 is in the wearing state. Based on this, and in combination with Fig. 20 and Fig.21, this embodiment can be defined as follows: when the earphone 100 is in a wearing state, the one of the two core modules 10 located on the left side of the user's head is the left earphone core module, for example Fig. 20 As shown; the one located on the right side of the user's head is the right earphone core module, for example Fig.21 As shown. Furthermore, in addition to the transducer device 12 and other sound-related structural parts, the core module 10 can also be provided with other auxiliary devices such as function buttons and microphones to enrich and expand the functions of the earphone 100. Based on the general usage habits of the user, the function buttons can be placed in the left earphone core module, and the microphone can be placed in the right earphone core module. Among them, the volumes of the function buttons and the microphone can be different. Of course, the auxiliary devices can also have other settings and distributions, such as placing a microphone in each of the left and right earphone core modules, which are not listed here one by one.

[0153] As an example, in combination Fig. 20 The movement module 10 may include a function button 16 disposed in the accommodating cavity of the movement housing 11, and the function button 16 may be exposed from the rear housing 115 to receive a pressing operation by the user. The triggering direction of the function button 16 may be substantially consistent with the vibration direction of the transducer 12.

[0154] As an example, in combination Fig.21 The movement module 10 may include a first microphone 171 disposed in the accommodating cavity of the movement housing 11, and the first microphone 171 can collect sounds outside the movement module 10. The angle between the vibration direction of the first microphone 171 and the vibration direction of the transducer device 12 may be between 65 degrees and 115 degrees. In this way, the first microphone 171 is prevented from mechanically resonating with the vibration of the transducer device 12, thereby improving the sound pickup effect of the movement module 10.

[0155] Further, the movement module 10 may also include a second microphone 172 disposed in the accommodating cavity of the movement housing 11, and the second microphone 172 may collect sounds outside the movement module 10. Among them, the angle between the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171 may be between 65 degrees and 115 degrees. In this way, the second microphone 172 and the first microphone 171 can receive two different sounds respectively, and can receive the same sound from two different directions, thereby improving the noise reduction, voice call and other functions of the headset 100. Based on this, the headset 100 may also include a processing circuit (not shown in the figure) integrated on the main control circuit board 40, and the processing circuit may use the first microphone 171 as the main microphone, for example, for collecting the user's voice, and the second microphone 172 as the auxiliary microphone, for example, for collecting the ambient sound of the user's environment, and the sound signal collected by the second microphone 172 is subjected to noise reduction processing on the sound signal collected by the first microphone 171. Among them, the first microphone 171 and the second microphone 172 can be welded on the same flexible circuit board to simplify the wiring structure of the movement module 10. Preferably, the vibration direction of the first microphone 171 is perpendicular to the vibration direction of the transducer device 12 , and the vibration direction of the second microphone 172 is perpendicular to the vibration direction of the first microphone 171 .

[0156] Based on the above description, the movement module 10 may further include a diaphragm 13 connected between the transducer 12 and the movement housing 11, so that the movement module 10 can generate air conduction sound while generating bone conduction sound. Fig. 20 (or Fig.21 )and Figure 2 The movement module 10 may further include a partition 18, which is disposed in the rear cavity 112 to separate the auxiliary device from the rear cavity 112, so that the space where the rear cavity 112 is located is as free as possible from the influence of the auxiliary device, so that the wall surface surrounding the rear cavity 112 can be as smooth and round as possible, thereby improving the acoustic performance of the air-conducted sound of the earphone 100. At this time, the transducer 12 is located on the side of the partition 18 facing the front cavity 111.

[0157] As an example, the partition 18 can separate the back cavity 112 into a first sub-back cavity 1121 arranged close to the front cavity 111 and a second sub-back cavity 1122 arranged away from the front cavity 111. Among them, the sound outlet 113 and the sound adjustment hole 117 can be connected to the first sub-back cavity 1121 respectively, and auxiliary devices such as the function button 16 and the second microphone 172 can be arranged in the second sub-back cavity 1122; and the first microphone 171 can be arranged in the first sub-back cavity 1121. Based on this, the function button 16 and the second microphone 172 can be fixed between the rear bottom plate 1151 of the left and right earphone core modules and the corresponding partition 18 respectively. Correspondingly, the first microphone 171 can be fixed in the groove (not marked in the figure) of the rear cylindrical side plate 1152 of the right earphone core module to avoid the collision between the transducer 12 and the first microphone 171 during the working vibration, thereby increasing the reliability of the core module 10. Among them, for the left earphone core module, the partition 18 can be used to withstand the pressing force applied by the user to the function button 16.

[0158] Furthermore, the partition 18 can also be used to adjust the size of the first sub-rear cavity 1121, so that the volume of the first sub-rear cavity 1121 of the left earphone core module is the same as the volume of the first sub-rear cavity 1121 of the right earphone core module. In this way, the air conduction sound output by the left earphone core module and the right earphone core module respectively tend to be consistent in the frequency response curve, thereby improving the acoustic performance of the earphone 100.

[0159] It should be noted that: due to force majeure factors such as processing accuracy and assembly accuracy, the volumes of the first sub-rear cavities of the left and right earphone core modules are the same, which also means that a certain difference between the volumes of the two is allowed, for example, less than or equal to 10%.

[0160] Furthermore, the second rear sub-cavity 1122 may be filled with a colloid (not shown in the figure). The filling rate of the second rear sub-cavity 1122 by the colloid may be greater than or equal to 90%, so that the second rear sub-cavity 1122 is as solid as possible. In this way, the second rear sub-cavity 1122 is prevented from being a hollow structure and causing acoustic resonance with the first rear sub-cavity 1121, thereby improving the acoustic performance of the earphone 100.

[0161] As an example, the partition 18 can be made of a light-transmitting material; accordingly, the colloid to be filled can be a light-curing glue, which can be cured under the action of light. Among them, the partition 18 can be pre-fixed with the rear shell 115 by means of a hot melt column. Furthermore, the gap between the side of the partition 18 and the rear shell 115 can also be filled with the light-curing glue. Similarly, the groove of the rear cylindrical side plate 1152 can also be filled with light-curing glue or other colloids after accommodating the second microphone 172.

[0162] Furthermore, combined with Fig. 20 (or Fig.21 )and Figure 2 In the vibration direction of the transducer device 12, the outer end surface of the magnetic shield 1221 facing away from the front cavity 111 is spaced from the partition 18 to avoid collision between the two when the transducer device 12 is working. In addition, the spacing distance between the central area of ​​the outer end surface of the magnetic shield 1221 and the partition 18 can be greater than the spacing distance between the edge area of ​​the outer end surface of the magnetic shield 1221 and the partition 18, that is, the middle area of ​​the first sub-rear cavity 1121 is more spacious than its edge area, thereby facilitating the flow of air in the first sub-rear cavity 1121. Among them, for the magnetic shield 1221, the central area of ​​the side of its bottom plate 1223 facing the partition 18 can be concave in the direction away from the partition 18 to form a curved surface; and / or, for the partition 18, the central area of ​​the side of the partition 18 facing the magnetic shield 1221 can be concave in the direction away from the magnetic shield 1221 to form a curved surface.

[0163] Combination Fig. 22 and Figure 1 The ear hook assembly 20 may include a storage compartment 21, a bending transition portion 22 and a movement fixing portion 23. The storage compartment 21 may be used to accommodate the main control circuit board 40 or the battery 50, the movement fixing portion 23 is used to fix the movement module 10, and the bending transition portion 22 connects the storage compartment 21 and the movement fixing portion 23. Furthermore, the bending transition portion 22 may be arranged in a bending shape so that the ear hook assembly 20 can be hung between the ear and the head of the user.

[0164] As an example, the accommodating compartment 21 and the movement fixing portion 23 can be plastic parts respectively, the bending transition portion 22 can have an elastic wire built in, and the elastic wire and the plastic can be integrally connected by a metal insert molding process. The surface of the ear hook component 20 can be an elastic coating to improve the wearing comfort of the earphone 100.

[0165] As an example, the storage compartment 21 may include a main compartment body 211 and a cover plate 212. Fig.23 The main compartment body 211 is used to form a receiving space with an opening at one end (not marked in the figure), and the cover plate 212 can be covered on the opening end of the main compartment body 211. Fig.24, the open end of the main warehouse body 211 may be provided with an outer end face 2111, an inner side face 2112, and a transition face 2113 obliquely connecting the outer end face 2111 and the inner side face 2112. Among them, when the cover plate 212 is covered on the open end of the main warehouse body 211, the cover plate 212 and at least a part of the transition face 2113 are arranged at intervals to form a glue-containing space 213 for accommodating the colloid between the cover plate 212 and the transition face 2113. At this time, the cover plate 212 and the main warehouse body 211 can be connected through the colloid (not shown in the figure) in the glue-containing space 213. In this way, compared with the related art in which a ring-shaped dispensing platform substantially perpendicular to the inner side face 2112 is provided between the outer end face 2111 and the inner side face 2112, this embodiment can meet the dispensing requirements while ensuring the structural strength of the open end of the main warehouse body 211 to the greatest extent, thereby facilitating the thinness of the overall structure of the main warehouse body 211. The wall thickness of the opening end of the main chamber body 211 may be between 0.6 mm and 1.0 mm. Of course, in other embodiments, when the cover plate 212 is disposed on the opening end of the main chamber body 211, the cover plate 212 and the outer end surface 2111 may also be connected by welding. In this case, the opening end of the main chamber body 211 may not be provided with a transition surface 2113.

[0166] Furthermore, the transition surface 2113 may be a plane, and may be connected to the outer end surface 2111 and the inner side surface 2112 at an obtuse angle, respectively. The obtuse angle (e.g., θ1) between the transition surface 2113 and the outer end surface 2111 may be smaller than the obtuse angle (e.g., θ2) between the transition surface 2113 and the inner side surface 2112. In this way, while ensuring that the volume of the glue-containing space 213 can meet the glue dispensing requirements, the local wall thickness of the opening end of the main warehouse body 211 is guaranteed to the greatest extent, thereby increasing the structural strength of the opening end of the main warehouse body 211. As an example, the obtuse angle between the transition surface 2113 and the outer end surface 2111 may be between 110 degrees and 135 degrees; or, the obtuse angle between the transition surface 2113 and the inner side surface 2112 may be between 135 degrees and 160 degrees.

[0167] It should be noted that the transition surface 2113 may also be provided with a knurled structure to increase its contact area with the colloid, thereby improving the bonding strength between the cover plate 212 and the main chamber body 211 .

[0168] As an example, in combination Fig.23 and Fig.24, the cover plate 212 may include a main cover body 2121 and an annular flange 2122 connected to the main cover body 2121. The main cover body 2121 may be covered on the outer end surface 2111 and contact the outer end surface 2111 to play a role of limiting; the annular flange 2122 extends into the main chamber 211. At this time, the glue space 213 may be formed between the transition surface 2113 and the lower surface of the main cover body 2121 and the outer side surface of the annular flange 2122. Based on this, the main chamber 211 and the cover plate 212 may be assembled in an inverted manner, for example, firstly, a proper amount of colloid is applied between the lower surface of the main cover body 2121 and the outer side surface of the annular flange 2122 along the circumference of the cover plate 212 by a glue dispenser, and then the ear hook assembly 20 is inverted on the cover plate 212 through the main chamber 211 to prevent the colloid from overflowing toward the inside of the main chamber 211.

[0169] As an example, in combination Fig.23 , a main control circuit board 40 may be arranged in the accommodating compartment 21, and a switch assembly 41 may be arranged on the main control circuit board 40. The switch assembly 41 may include a first fixing portion 411, a second fixing portion 412, and a switch body 413, the second fixing portion 412 may be bent and connected to the first fixing portion 411, and the switch body 413 may be arranged on the second fixing portion 412. At this time, the first fixing portion 411 may be arranged in contact with the main surface of the main control circuit board 40, and the two may be welded together, the second fixing portion 412 may be arranged in contact with the side surface of the main control circuit board 40, and the switch body 413 is located on the side of the second fixing portion 412 away from the main circuit board 40.

[0170] Further, the main cover 2121 may be provided with a button hole 2123, and the button hole 2123 may be surrounded by the annular flange 2122. Accordingly, the ear hook assembly 20 may further include a button assembly 24 fixed to the side of the main cover 2121 away from the annular flange 2122, and the button assembly 24 is configured to receive a pressing force applied by a user and trigger the switch assembly 41 through the button hole 2123. At this time, the pressing direction of the button assembly 24 on the switch assembly 41 may be parallel to the main surface of the main control circuit board 40 to prevent the main control circuit board 40 from being deformed in a direction perpendicular to its main surface.

[0171] As an example, in combination Fig. 22 and Fig.23, the side of the main cover 2121 away from the annular flange 2122 can also be partially recessed toward the annular flange 2122 to form a placement area 2124, and the button hole 2123 can be set in the placement area 2124. Correspondingly, the button assembly 24 can include a soft button 241 and a hard button 242 connected to the soft button 241. Among them, the soft button 241 is set in the placement area 2124 and covers the button hole 2123. At this time, the user presses the hard button 242 to deform the soft button 241, and generates a stroke toward the inside of the accommodating compartment 21 under the avoidance of the button hole 2123, and then acts on the switch body 413 to trigger the switch assembly 41.

[0172] Further, the soft button 241 may include an integrally connected middle protrusion 2411 and an edge connection portion 2412, wherein the edge connection portion 2412 is used to connect to the main cover 2121, and the middle protrusion 2411 is used to connect to the hard button 242. Among them, the depth of the placement area 2124 is greater than the thickness of the edge connection portion 2412, and less than the thickness of the middle protrusion 2411. At this time, the soft button 241 and the cover plate 212 can be integrally connected by a two-color injection molding process. Since the depth of the placement area 2124 is greater than the thickness of the edge connection portion 2412, glue overflow during the molding process can be avoided. Of course, in some other embodiments, a ring bone position surrounding the placement area 2124 can also be set on the side of the main cover 2121 away from the annular flange 2122. The height of the ring bone position protruding from the main cover 2121 can be about 0.05mm, and its ring width can be about 0.2mm, so that it can be used as a glue retaining wall during the molding process, which can also avoid glue overflow.

[0173] As an example, in combination Fig.23 , the number of switch components 41, button holes 2123 and soft buttons 241 can be two respectively, and they are arranged one by one. Among them, the middle raised portion 2411 of each soft button 241 can be provided with a blind hole (not marked in the figure). Correspondingly, the hard button 242 can include a pressing portion 2421 and a plug post 2422 that are integrally connected. Among them, the number of the plug posts 2422 can also be two, and each plug post 2422 is respectively embedded in a blind hole, and the two can be interference fit. Based on this, the two switch components 41 can respectively correspond to the volume up button and the volume down button of the headset 100, and any one of them can also be expanded as a power button of the headset 100.

[0174] Combination Fig.25 and Fig.26, the rear hanging component 30 may include an elastic metal wire 31 and a metal connector 32, and the metal connector 32 may be respectively sleeved and fixed on both ends of the elastic metal wire 31. At this time, the two ends of the rear hanging component 30 may be plugged and connected with one end of the ear hanging component 20 (for example, its accommodating compartment 21) through their respective metal connectors 32. Among them, the deformation amount of the first part 311 of the elastic metal wire 31 located inside the metal connector 32 compared with the second part 312 of the elastic metal wire 31 located outside the metal connector 32 may be less than or equal to 10%. In this way, compared with the related art of first flattening the two ends of the elastic metal wire and then injecting the two ends of the elastic metal wire to form a plastic connector, the present embodiment uses the metal connector 32 instead of the plastic connector, so that the two ends of the elastic metal wire 31 do not need (or are less) to deform, thereby avoiding the two ends of the elastic metal wire 31 from becoming brittle due to deformation, so as to increase the reliability of the rear hanging component 30. In addition, compared with the plastic connector, the metal connector 32 itself has a better structural strength.

[0175] It should be noted that the deformation amount described in this embodiment can be calculated by the following method: in, is the cross-sectional dimension in any direction along the geometric center of the cross section of the first portion 311, is the geometric center of the cross section through the second portion 312 and is For example, if the elastic metal wire 31 is a wire and has not been deformed, then They correspond to the wire diameters of the first portion 311 and the second portion 312 respectively.

[0176] As an example, for the elastic metal wire 31, the second part 312 can be arranged in a curved shape compared to the first part 311, so that the rear hanging component 30 can be wound around the back of the user's head. Further, the material of the elastic metal wire 31 can be spring steel, titanium alloy, titanium-nickel alloy, chrome-molybdenum steel, etc., and the material of the metal connector 32 can be titanium alloy (such as nickel-titanium alloy, titanium alloy, β-titanium, etc.), steel alloy (such as stainless steel, carbon steel, iron, etc.), copper alloy (such as copper, brass, bronze and white copper), aluminum alloy, etc.

[0177] In some embodiments, the metal connector 32 may be provided with a mounting hole (not marked in the figure). In this case, the elastic metal wire 31 may be inserted into the mounting hole and connected to the metal connector 32 by welding. Fig.26, the end of the elastic metal wire 31 can be further exposed from the outer end surface of the metal connector 32, and the welding point between the elastic metal wire 31 and the metal connector 32 can be formed between the exposed portion of the elastic metal wire 31 and the outer end surface of the metal connector 32. In short, the metal connector 32 is sleeved on the elastic metal wire 31 and the end of the elastic metal wire 31 can be exposed, and then the ends of the two are welded.

[0178] In some other embodiments, the metal connector 32 is connected to the metal connector 32 by die-casting. Compared with the above-mentioned welding connection, the die-casting connection allows the metal connector 32 to be directly wrapped on the elastic metal wire 31, similar to plastic injection molding.

[0179] Furthermore, whether it is a welding connection or a die-casting connection, in order to increase the bonding strength between the elastic metal wire 31 and the metal connector 32, the outer surface of the first part 311 may be provided with a knurling structure (not shown in the figure) to increase the contact area between the elastic metal wire 31 and the metal connector 32. The ratio between the depth of the knurling structure and the cross-sectional dimension of the first part 311 may be less than or equal to 15%. Preferably, the ratio between the depth of the knurling structure and the cross-sectional dimension of the first part 311 may be less than or equal to 5%. For example, the depth of the knurling structure is between 0.2 mm and 0.3 mm.

[0180] As an example, in combination Fig.26 and Fig. 27 The metal connector 32 can be provided in a columnar shape and can have a mounting surface 321 parallel to the axial direction of the metal connector 32. The mounting surface 321 can be provided in a planar shape and penetrate through both ends of the metal connector 32 along the aforementioned axial direction. In this way, since the wire 33 mentioned later is generally a wire material, its cross section is generally circular, so that the metal connector 32 can be assembled with the wire 33 through the planar mounting surface 321, which is convenient for setting the routing of the rear hanging component 30.

[0181] Furthermore, the metal connector 32 may also have an anti-rotation surface 322 parallel to the mounting surface 321. In this way, after the rear hanging component 30 is plugged and connected with the ear hanging component 20 (for example, its storage bin 21) through the metal connector 32, the two are not easy to rotate relative to each other. Among them, the anti-rotation surface 322 only penetrates one end of the metal connector 32 close to the end of the elastic metal wire 31 along the aforementioned axial direction, so that one end of the metal connector 32 can form a stop flange 323 connected to the anti-rotation surface 322. In this way, during the process of plugging and connecting the rear hanging component 30 with the ear hanging component 20 (for example, its storage bin 21) through the metal connector 32, the metal connector 32 can be limited by the stop flange 323 abutting against the end face of the ear hanging component 20.

[0182] Furthermore, a stop groove 324 may be provided at the other end of the metal connector 32 away from the stop flange 323. The stop groove 324 may penetrate the mounting surface 321 and the anti-rotation surface 322 along one radial direction of the metal connector 32, and two stop grooves 324 may be provided opposite to each other along another radial direction of the metal connector 32. In this way, the metal connector 32 and the ear hook assembly 20 (e.g., the accommodating compartment 21 thereof) may form a snap fit, thereby preventing the rear hook assembly 30 from being separated from the ear hook assembly 20 after assembly.

[0183] As an example, in combination Fig.28 and Fig.25 The rear hanging component 30 may further include a wire 33 and an elastic covering body 34. The length of the wire 33 is greater than the length of the elastic metal wire 31, and extends from one end of the elastic metal wire 31 to the other end thereof. Furthermore, the elastic covering body 34 may be made of a soft material (such as silicone), and may cover the wire 33, the elastic metal wire 31, and the metal connectors 32 at both ends thereof, so as to improve the wearing comfort of the earphone 100.

[0184] In some embodiments, the elastic covering body 34 may be provided with a threading channel (not marked in the figure), and the elastic metal wire 31 and the wire 33 are threaded in the threading channel. In order to facilitate threading, the size of the threading channel is set to allow the elastic metal wire 31 and the wire 33 to move in the threading channel, for example, the cross-sectional area of ​​the threading channel is greater than the sum of the cross-sectional areas of the elastic metal wire 31 and the wire 33.

[0185] In some other embodiments, the elastic coating body 34 may be coated with the wire 33 by injection molding and provided with a threading channel, in which the elastic metal wire 31 is threaded. Similarly, in order to facilitate threading, the size of the threading channel is set to allow the elastic metal wire 31 to move in the threading channel, for example, the cross-sectional area of ​​the threading channel is larger than the cross-sectional area of ​​the elastic metal wire 31.

[0186] As an example, in combination Fig.25 and Figure 1 The elastic covering body 34 may include an integrally connected rear hanging covering portion 341 and a bin covering portion 342. The rear hanging covering portion 341 is used to cover the elastic metal wire 31 and the wire 33, and the bin covering portion 342 is used to at least partially cover the accommodating bin 21 after the metal connector 32 is plugged and connected to the accommodating bin 21.

[0187] Further, the housing covering portion 342 may at least partially cover the storage bin 21, and may include a first covering portion 3421 close to the metal connector 32 and a second covering portion 3422 away from the metal connector 32. The first covering portion 3421 and the second covering portion 3422 may be bonded and fixed to the storage bin 21, respectively, and the bonding strength between the second covering portion 3422 and the storage bin 21 is greater than the bonding strength between the first covering portion 3421 and the storage bin 21. In this way, by utilizing the difference in bonding strength, the relative position of the housing covering portion 342 and the storage bin 21 may be adjusted during the bonding process to eliminate the assembly error between the two, thereby improving the appearance quality of the earphone 100. Based on this, the first covering portion 3421 may be fixedly connected to the storage bin 21 by a first colloid (not shown in the figure), and the second covering portion 3422 may be fixedly connected to the storage bin 21 by a second colloid (not shown in the figure), and the curing speed of the second colloid is greater than the curing speed of the first colloid. For example, the first colloid may be silicone glue or other soft glue, and the second colloid may be instant glue, structural glue, PUR glue, etc. The second colloid may be mainly applied to the end of the second covering portion 3422 away from the first covering portion 3421 to play a role of pre-fixation.

[0188] Based on the above description, the storage compartment 21 can be a plastic part, and the elastic covering body 34 can be a silicone part. Due to the large difference in the materials of the two, it is easy for the two to come apart after being directly glued together. Fig.25 , a transition connector 3423 may be injection molded inside the second covering portion 3422, and the bonding strength between the transition connector 3423 and the accommodating bin 21 is greater than the bonding strength between the second covering portion 3422 and the accommodating bin 21, so as to replace the bonding between the second covering portion 3422 and the accommodating bin 21. The transition connector 3423 may be a metal part or a plastic part; and when the transition connector 3423 is a plastic part, its material may be the same as that of the accommodating bin 21.

[0189] As an example, in combination Fig.25 and Fig. 22 As for the bin body covering portion 342, the first covering portion 3421 can be set in a sleeve shape, and the second covering portion 3422 can be set in a strip shape. In this way, after the metal connector 32 is plugged and connected with the accommodating bin 21, when the bin body covering portion 342 covers the accommodating bin 21, the first covering portion 3421 can be set on the periphery of the main bin body 211 and the cover plate 212, and the second covering portion 3422 covers the cover plate 212, and can further cover the matching gap between the cover plate 212 and the main bin body 211, so as to increase the waterproof performance of the earphone 100.

[0190] Furthermore, combined with Fig.25 and Fig.23The second covering portion 3422 may be provided with avoidance holes 3424 corresponding to the button holes 2123, so that the middle protrusion 2411 of each soft button 241 can be exposed through the avoidance hole 3424 and then connected to the hard button 242. The edge connection portion 2412 of each soft button 241 is located between the main cover 2121 and the second covering portion 3422, and the pressing portion 2421 is located on the side of the second covering portion 3422 away from the main cover 2121. In this way, the waterproof performance of the earphone 100 is improved.

[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 transducer is arranged in the receiving cavity and connected with 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 with the rear cavity, and the diaphragm generates air conduction sound transmitted to the human ear through the sound outlet hole during the relative movement between the transducer and the movement housing; the movement housing comprises a rear housing and a front housing connected with the rear housing, wherein the rear housing and the front housing are connected with each other to form the receiving cavity; The movement module also includes a partition and an auxiliary device. The partition is arranged in the rear cavity, and the transducer is located on the side of the partition facing the front cavity. The partition divides the rear cavity into a first sub-rear cavity arranged close to the front cavity and a second sub-rear cavity arranged away from the front cavity. The sound outlet is connected to the first sub-rear cavity, and the auxiliary device is arranged in the second sub-rear cavity.

2. The earphone according to claim 1, characterized in that The core module comprises a left earphone core module and a right earphone core module, and the volumes of the first sub-rear cavities of the left earphone core module and the right earphone core module are the same.

3. The earphone according to claim 1, characterized in that The second rear sub-cavity is filled with colloid.

4. The earphone according to claim 3, characterized in that: The partition is made of light-transmitting material, and the colloid is a light-curing glue.

5. The earphone according to claim 2, characterized in that: The transducer device includes a magnetic circuit system, which includes a magnetic cover and a magnet arranged in the magnetic cover. Along the vibration direction of the transducer device, the outer end surface of the magnetic cover facing away from the front cavity is spaced apart from the partition, and the spacing distance between the central area of ​​the outer end surface of the magnetic cover and the partition is greater than the spacing distance between the edge area of ​​the outer end surface of the magnetic cover and the partition.

6. The earphone according to claim 1, characterized in that The movement housing is also provided with a pressure relief hole connected to the front cavity, the pressure relief hole is staggered with the sound outlet hole, and the outlet end cover of the pressure relief hole is provided with a first sound resistance net, and the porosity of the first sound resistance net is greater than or equal to 7%.

7. The earphone according to claim 6, characterized in that The movement housing is also provided with a sound-adjusting hole communicating with the first rear sub-cavity, and the outlet end cover of the sound-adjusting hole is provided with a second sound resistance net, and the porosity of the second sound resistance net is less than or equal to 16%.

8. The earphone according to claim 7, characterized in that: The sound adjustment hole and the pressure relief hole are arranged adjacent to each other, and the interval distance is less than or equal to 2 mm.

9. The earphone according to claim 8, characterized in that The core module also includes a protective cover, which is arranged around the periphery of the pressure relief hole and the sound adjustment hole and covers the first sound resistance net and the second sound resistance net.

10. The earphone according to claim 1, 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 length of the sound-conducting channel is less than or equal to 7 mm.

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