Ear hook assembly and headphones

Abstract

The present application mainly relates to an ear hook assembly and headphones. The ear hook assembly includes a storage compartment for accommodating a main control circuit board. A switch assembly is provided on the main control circuit board. The switch assembly includes a first fixing portion, a second fixing portion and a switch body. The first fixing portion is fitted with the main surface of the main control circuit board, the second fixing portion is bent and connected to the first fixing portion, and is fitted with the side surface of the main control circuit board. The switch body is provided on the side of the second fixing portion facing away from the main circuit board.

Description

[0001] This application is a divisional application of the Chinese patent application submitted to the China Patent Office on April 9, 2021, with application number 2021103821594 and invention name “Headphones and their earhook components”. Technical Field

[0002] The present application relates to the technical field of electronic devices, and in particular to ear hook assemblies and headphones. Background Art

[0003] With the increasing popularity of electronic devices, they have become indispensable social and entertainment tools in people's daily lives, and people's expectations for electronic devices are becoming increasingly higher. For example, electronic devices such as headphones require not only excellent wearing comfort, but also sound quality with deep bass, penetrating treble, and good battery life. Summary of the Invention

[0004] An embodiment of the present application provides an ear hook assembly, which includes a storage compartment for accommodating a main control circuit board. A switch assembly is provided on the main control circuit board. The switch assembly includes a first fixing portion, a second fixing portion and a switch body. The first fixing portion is fitted with the main surface of the main control circuit board, the second fixing portion is bent and connected to the first fixing portion, and is fitted with the side surface of the main control circuit board. The switch body is provided on the side of the second fixing portion facing away from the main circuit board.

[0005] Optionally, the ear hook assembly further includes a button assembly for receiving a pressing force applied by a user to trigger the switch assembly, and the pressing direction of the button assembly on the switch assembly is parallel to the main surface of the main control circuit board.

[0006] Optionally, the accommodating bin includes a main bin body and a cover plate, the main bin body is used to form a accommodating space with an open end, the cover plate includes a main cover body and an annular flange connected to the main cover body, the main cover body is arranged on the open end of the main bin body, and is provided with a button hole, the annular flange extends into the main bin body, the button assembly is fixed on the side of the main cover body away from the annular flange, and the switch assembly is triggered through the button hole.

[0007] Optionally, the button assembly includes a soft button and a hard button, and a portion of a side of the main cover body facing away from the annular flange is recessed toward the annular flange to form a placement area, the button hole is arranged in the placement area, the soft button is arranged in the placement area and covers the button hole, the soft button includes an integrally connected middle protrusion and an edge connection part, the edge connection part is connected to the main cover body, and the hard button is connected to the middle protrusion part, and the depth of the placement area is greater than the thickness of the edge connection part and less than the thickness of the middle protrusion part.

[0008] Optionally, an annular frame surrounding the placement area is provided on one side of the main cover body away from the annular flange, and the annular frame serves as a glue retaining wall during the molding process to prevent glue overflow.

[0009] Optionally, the number of switch assemblies, button holes and soft buttons is two respectively, and they are arranged in one-to-one correspondence. A blind hole is provided on the middle raised portion of each soft button. The hard button includes an integrally connected pressing portion and a plug-in column. The number of the plug-in columns is two, and each plug-in column is embedded in a blind hole.

[0010] Optionally, the open end of the main bin body is provided with an outer end face, an inner side face and a transition face obliquely connecting the outer end face and the inner side face. The transition face is a plane and is connected to the outer end face and the inner side face at an obtuse angle respectively. A colloid-containing space for accommodating the colloid is formed between the transition face and the lower surface of the main cover body and the outer side face of the annular flange.

[0011] Optionally, the obtuse angle between the transition surface and the outer end surface is smaller than the obtuse angle between the transition surface and the inner side surface.

[0012] Optionally, the obtuse angle between the transition surface and the outer end surface is between 110 degrees and 135 degrees; or, the obtuse angle between the transition surface and the inner side surface is between 135 degrees and 160 degrees.

[0013] An embodiment of the present application further provides an earphone, which includes a core module and the ear hook assembly described in the above embodiment, and one end of the ear hook assembly is connected to the core module. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0015] Figure 1 This is a schematic structural diagram of an embodiment of the earphone provided by this application;

[0016] Figure 2 This is a schematic cross-sectional view of an embodiment of a movement module provided by the present application;

[0017] Figure 3 This is a schematic diagram comparing the frequency response curves of the headphones provided by this application before and after the diaphragm is installed;

[0018] Figure 4 This is a schematic cross-sectional view of an embodiment of a movement housing provided by the present application;

[0019] Figure 5 is a schematic cross-sectional structural diagram of an embodiment of a transducer device provided by the present application;

[0020] Figure 6 is a schematic diagram of a partial cross-sectional structure of various embodiments of the diaphragm provided in this application;

[0021] Figure 7 is a schematic diagram of a partial cross-sectional structure of the diaphragm provided in this application;

[0022] Figure 8 It is a schematic diagram of the principle structure of various embodiments of the sound guide component provided by this application;

[0023] Figure 9 This is a schematic top view of the structure of an embodiment of the acoustic resistance net provided by the present application;

[0024] Figure 10 1. This 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;

[0025] Figure 11 1. This 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;

[0026] Figure 12 1 is a schematic diagram of a frequency response curve of air-conducted sound at a pressure relief hole of an earphone according to an embodiment of the present application;

[0027] Figure 13 This is a comparative 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 set;

[0028] Figure 14 1. This 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;

[0029] Figure 15 1. This is a schematic diagram of a frequency response curve of air-conducted sound at a sound-conducting component of an earphone according to an embodiment of the present application;

[0030] Figure 16 This is a schematic diagram of the frequency response curve of the sound leakage of the movement module provided by this application;

[0031] Figure 17 This is a schematic diagram of the principle structure of an embodiment of a movement module provided by this application;

[0032] Figure 18 This is a schematic diagram of the exploded structure of an embodiment of a movement module provided by the present application;

[0033] Figure 19 This is a schematic diagram of the exploded structure of an embodiment of a movement module provided by the present application;

[0034] Figure 20 This is a schematic cross-sectional view of an embodiment of a movement module provided by the present application;

[0035] Figure 21 This is a schematic cross-sectional view of an embodiment of a movement module provided by the present application;

[0036] Figure 22 This is a schematic diagram of the exploded structure of an embodiment of an ear hook assembly provided by the present application;

[0037] Figure 23 yes Figure 22 A partial cross-sectional diagram of the middle ear hook assembly;

[0038] Figure 24 yes Figure 23 Schematic diagram of the local enlarged structure of area A in the middle;

[0039] Figure 25 This is a schematic diagram of the exploded structure of an embodiment of a rear-mounted assembly provided by the present application;

[0040] Figure 26 yes Figure 25 Schematic diagram of the local enlarged structure of area B in the middle;

[0041] Figure 27 yes Figure 25 Schematic diagram of the structure of the metal connector in contact with the wire side;

[0042] Figure 28 yes Figure 25 A partial cross-sectional diagram of the center rear hanger assembly;

[0043] Figure 29 It is a structural schematic diagram of an embodiment of a coil support provided in this application. DETAILED DESCRIPTION

[0044] The present application will be 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 and do not limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application and not all embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0045] 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.

[0046] Combine Figure 1The earphone 100 may include two core modules 10, two ear hook components 20, and a back-hanging component 30. The two ends of the back-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 facing away from the back-hanging component 30 is respectively connected to a corresponding core module 10. Furthermore, the back-hanging component 30 may be configured to be curved so as to be placed around the back of the user's head, and the ear hook component 20 may also be configured to be curved so as to be placed between the user's ear and head, thereby facilitating the wearing requirements of the earphone 100. The core module 10 is configured to convert electrical signals into mechanical vibrations so that the user can hear sound through the earphone 100. Thus, when the earphone 100 is in the wearing state, the two core modules 10 are respectively located on the left and right sides of the user's head. The two core modules 10 also press the user's head under the cooperative action of the two ear hook components 20 and the back-hanging component 30, and the user can also hear the sound output by the earphone 100.

[0047] It should be noted that the earphone 100 can 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 the user's head, which are not listed here one by one.

[0048] Combine Figure 1 , the earphones 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, both 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 earphones 100. Of course, the earphones 100 described in the present application may further 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.

[0049] It should be noted that the present application includes two movement modules 10, both of which can convert electrical signals into movement vibrations, primarily to facilitate stereo sound effects in the headset 100. Therefore, in other applications where stereo sound is not particularly critical, such as hearing aids for hearing-impaired patients and live teleprompters, the headset 100 may also be equipped with only one movement module 10.

[0050] Based on the above-mentioned relevant description, the movement module 10 is used to convert electrical signals into mechanical vibrations when powered on, so that the user can hear sounds through the earphones 100. Generally speaking, the aforementioned mechanical vibrations 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 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-conducted sound" and the latter can be simply referred to as "air-conducted sound". Based on this, the movement module 10 can form both bone-conducted sound and air-conducted sound, and can also form both bone-conducted sound and air-conducted sound at the same time.

[0051] Combine 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 the electrical signal into mechanical vibration when powered on, so that the skin contact area of ​​the movement housing 11 (for example Figure 4 The front bottom plate 1161 shown in FIG. 1 is capable of generating bone-conducted sound under the action of the transducer module 12. Thus, when a user wears the earphones 100, the transducer module 12 converts electrical signals into movement vibrations, which in turn drive the aforementioned skin contact area to generate mechanical vibrations. These mechanical vibrations then act directly on the user's auditory nerves through the user's bones and tissues, allowing the user to hear the bone-conducted sound through the movement module 10.

[0052] 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 above-mentioned skin contact area. In other words, when the user wears the earphones 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.

[0053] It should be noted that: Figure 2When the transducer 12 causes the skin contact area to move toward the user's face, this can be simply considered bone-conducted sound enhancement. Simultaneously, the portion of the movement housing 11 opposite the skin contact area moves toward the user's face. Due to the relationship between the action and reaction forces, the transducer 12 and its connected diaphragm 13 move away from the user's face, squeezing the air in the rear chamber 112. This increases the air pressure, resulting in an enhanced sound output through the sound outlet 113. This can be simply considered air-conducted sound enhancement. Accordingly, when the bone-conducted sound weakens, the air-conducted sound also weakens. Based on this, the bone-conducted sound and air-conducted sound generated by the movement module 10 in this application have the same phase. Furthermore, because the front chamber 111 and the rear chamber 112 are substantially separated by structural components such as the diaphragm 13 and the transducer 12, the variation pattern of the air pressure in the front chamber 111 is exactly opposite to that of the air pressure in the rear chamber 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 allows the front cavity 111 to communicate with the external environment, that is, air can freely enter and exit the front cavity 111. In this way, the change in air pressure in the rear cavity 112 can be minimized by the front cavity 111, which can effectively improve the acoustic performance of the air-conducted sound generated by the movement module 10. The pressure relief hole 114 and the sound outlet hole 113 are staggered, that is, they are not adjacent to each other, so as to minimize the occurrence of silencing due to the opposite phase between the two.

[0054] 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 can also be greater than or equal to the actual area of ​​the outlet end thereof.

[0055] It should be noted that due to the thickness of the movement housing 11 and other structural components, the sound outlet 113, pressure relief hole 114, and other through-holes in the movement housing 11 have a certain depth. Consequently, relative to the aforementioned accommodating cavity, the through-holes have an inlet end proximal to the accommodating cavity and an outlet end distal to the accommodating cavity. Furthermore, the actual area of ​​the outlet end described in this application can be defined as the area of ​​the end face where the outlet end is located.

[0056] 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 (i.e., the transducer device 12), and the two have the same phase, the sound heard by the user through the earphone 100 can be stronger, and the earphone 100 can also be more energy-efficient, thereby extending the battery life of the earphone 100. In addition, by rationally designing the structure of the core module 10, the air-conducted sound and bone-conducted sound can also cooperate with each other in the frequency band of the frequency response curve, so that the earphone 100 can have excellent acoustic performance in a specific frequency band. For example, the low frequency band of the bone-conducted sound can be compensated by the air-conducted sound, and the mid-frequency band and mid-high frequency band of the bone-conducted sound can be enhanced by the air-conducted sound.

[0057] It should be noted that in this application, the frequency range corresponding to the low frequency band can be 20-150 Hz, the frequency range corresponding to the mid-frequency band can be 150-5 kHz, and the frequency range corresponding to the high frequency band can be 5k-20 kHz. Among them, the frequency range corresponding to the mid-low frequency band can be 150-500 Hz, and the frequency range corresponding to the mid-high frequency band can be 500-5 kHz.

[0058] Based on the above detailed description, 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 correspondingly has a frequency response curve. Wherein, the frequency response curve can have at least one resonance peak. Further, the peak resonance frequency of the resonance peak can 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 can 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 either the transducer device 12 or 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, by introducing the diaphragm 13, the movement module 10 can synchronously output bone-conducted sound and air-conducted sound with the same phase, thereby improving the acoustic performance of the movement module 10 and making it more power-saving.

[0059] As an example, combining Figure 3, this embodiment can mainly examine the offset of the low frequency band or the mid-low frequency band in the frequency response curve, that is, f1≤500Hz, so that the low frequency and mid-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.

[0060] 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 (e.g., Figure 3 Further, for the frequency response curve described in this application, the horizontal axis may represent frequency, with the unit being Hz; and the vertical axis may represent intensity, with the unit being dB.

[0061] Combine 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. The rear housing 115 and the front housing 116 may be joined together to form a housing for accommodating structural components such as the transducer 12 and the diaphragm 13. Furthermore, the front housing 116 is configured 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 may 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 vibrations. Furthermore, the sound outlet 113 may be provided in the rear housing 115, and the pressure relief hole 114 may be provided in the front housing 116. The diaphragm 13 may be connected to the rear housing 115, the front housing 116, or the joint between the rear housing 115 and the front housing 116.

[0062] As an example, the rear housing 115 may include an integrally connected rear bottom plate 1151 and a rear cylindrical side plate 1152, wherein one end of the rear cylindrical side plate 1152 facing 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.

[0063] 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 can 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 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 113 can gradually decrease in the direction from the inlet end of the sound outlet 113 to the outlet end thereof (that is, the direction of the sound outlet 113 toward the sound outlet 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 bracket 121 mentioned later on the annular support 1153. Furthermore, the diaphragm 13 can be fixed on the annular support 1153, or pressed on the annular support 1153 by the coil bracket 121, and then connected to the movement shell 11.

[0064] By way of example, the front housing 116 may include an integrally connected front bottom plate 1161 and a front cylindrical side plate 1162. The end of the front cylindrical side plate 1162, facing away from the front bottom plate 1161, is connected to the rear housing 115. The area of ​​the front bottom plate 1161 may be simply considered the skin contact area as described herein. Accordingly, the pressure relief hole 114 may be provided on the front cylindrical side plate 1162.

[0065] Combine 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 disposed within the front cavity 111. The central region of the spring sheet 124 may be connected to the magnetic circuit system 122, and the peripheral region of the spring sheet 124 may be connected to the movement housing 11 via the coil support 121, so as to suspend the magnetic circuit system 122 within the movement housing 11. Furthermore, the coil 123 may be connected to the coil support 121 and extend into the magnetic gap of the magnetic circuit system 122.

[0066] As an example, the coil bracket 121 may include an annular main body portion 1211 and a first cylindrical bracket portion 1212, and one end of the first cylindrical bracket portion 1212 is connected to the annular main body portion 1211. The annular main body portion 1211 can be connected to the peripheral area of ​​the spring sheet 124, and the two can form an integral structural member with the help of a metal insert injection molding process. At this time, the annular main body portion 1211 can be connected to the front base plate 1161 by one or a combination of connection methods such as gluing and clamping. Furthermore, the coil 123 is connected to the other end of the first cylindrical bracket portion 1222 away from the annular main body portion 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.

[0067] Furthermore, the coil support 121 may also include a second cylindrical support portion 1213 connected to the annular main portion 1211. The second cylindrical support portion 1213 surrounds the first cylindrical support portion 1212 and extends laterally from the annular main portion 1211 in the same direction as the first cylindrical support portion 1212. The second cylindrical support portion 1213 and the annular main portion 1211 may be connected together to the front housing 116 to increase the connection strength between the coil support 121 and the movement housing 11. For example, the annular main portion 1211 is connected to the front bottom plate 1161, while the second cylindrical support portion 1213 is connected to the second annular side plate 1152. Accordingly, the second cylindrical support portion 1213 may be provided with an escape hole 1214 that communicates with 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 chamber 111. At this point, a portion of the diaphragm 13 can be connected to the magnetic circuit system 122, while the other portion can be connected to the other end of the second cylindrical bracket portion 1213 facing away from the annular main portion 1211, and thus connected to the movement housing 11. Based on this, after the movement module 10 is assembled, the other end of the second cylindrical bracket portion 1213 facing away from the annular main portion 1211 can press the other portion of the diaphragm 13 against the annular support 1153.

[0068] 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.

[0069] 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 to the bottom plate 1223. The side of the magnet 1222 facing 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 may extend 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.

[0070] It should be noted that the magnet 1222 can be a magnet group formed by multiple sub-magnets. In addition, a magnetic conductive plate (not marked in the figure) can be further provided on the side of the magnet 1222 facing away from the bottom plate 1223.

[0071] Combine Figure 6 、 Figure 5 and Figure 2 The diaphragm 13 may include a diaphragm body 131, which may include a first connecting portion 132, a pleated portion 133, and a second connecting portion 134 that are integrally connected. The first connecting portion 132 surrounds and is connected to the transducer 12; the second connecting portion 134 surrounds and is spaced apart from the first connecting portion 132 in a direction perpendicular to the vibration direction of the transducer 12; and the pleated portion 133 is located in the space between the first connecting portion 132 and the second connecting portion 134, connecting the first connecting portion 132 and the second connecting portion 134.

[0072] As an example, the first connecting portion 132 can be provided in a cylindrical shape and can be connected to the magnetic cover 1221; the second connecting portion 134 can be provided in a ring 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 further 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 facing away from the bottom plate 1223 .

[0073] 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 12, thereby reducing the influence of the diaphragm 13 on the transducer 12. Figure 2 , the recessed area 135 can be recessed toward the rear cavity 112. Of course, the recessed area 135 can also be recessed toward the front cavity 111, that is, Figure 2 The recessed areas 135 are shown to be recessed in opposite directions.

[0074] It should be noted that the number of recessed areas 135 can be multiple, for example, two or three, and they can be spaced apart in a direction perpendicular to 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 vary. In this embodiment, a case where there is only one recessed area 135 is used for illustrative purposes.

[0075] 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, polyacrylate (PAR), polyetherimide (PEI), polyimide (PI), polyethylene naphthalate two formic acid glycol ester (PEN), polyetheretherketone (PEEK), silica gel, etc. Among them, PET is a thermoplastic polyester with good molding properties, and the diaphragm made of it is often called Mylar film; PC has strong impact resistance and stable dimensions after molding; PAR is an advanced version of PC, mainly for environmental 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 is strong and 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. Common ones include double-layer structure (generally hot-pressed PU to increase internal resistance), three-layer structure (sandwich structure, with a damping layer of PU, acrylic glue, UV glue, and pressure-sensitive adhesive in the middle), and five-layer structure (two layers of film bonded by double-sided tape, and the double-sided tape has a base layer, usually PET).

[0076] Furthermore, the diaphragm 13 may also include a reinforcement ring 136, the hardness of which may be greater than that of the diaphragm body 131. The reinforcement ring 136 may be annular, with a width greater than or equal to 0.4 mm and a thickness less than or equal to 0.4 mm. Furthermore, the reinforcement ring 136 is connected to the second connecting portion 134, so that the second connecting portion 134 is connected to the movement housing 11 through the reinforcement ring 136. This increases the structural strength of the edge of the diaphragm 13, thereby increasing the connection strength between the diaphragm 13 and the movement housing 11.

[0077] It should be noted that the annular shape of the reinforcement ring 136 is primarily designed to facilitate its adaptation to the annular structure of the second connecting portion 134; however, the reinforcement ring 136 can be a continuous, full ring or a discontinuous, segmented ring. Furthermore, after the movement module 10 is assembled, the other end of the second cylindrical bracket portion 1213, facing away from the annular main portion 1211, can press the reinforcement ring 136 against the annular support 1153.

[0078] As an example, the first connecting portion 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 connecting portion 134 to simplify the connection method between the two and increase the connection strength between the two. Among them, the first connecting portion 132 can be covered with the cylindrical side plate 1224, and can also be further covered with the bottom plate 1223 to increase the contact area between the first connecting portion 132 and the magnetic circuit system 122, thereby increasing the bonding strength between the two. Similarly, the second connecting portion 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 connecting portion 134 and the reinforcement ring 136, thereby increasing the bonding strength between the two.

[0079] Combine Figure 6 , Figure 6 Figures (a) to (d) illustrate various structural deformations of the diaphragm body 131. The main difference between them is the specific structure of the folded portion 133. Figure 6 In (a), the folded portion 133 can be provided in a symmetrical structure, and the connection points formed by the first connection portion 132 and the second connection portion 134 at both ends can also be coplanar, for example, the projections of the two connection points in the vibration direction of the transducer device 12 coincide. Figure 6 In (b), the folded portion 133 can also be arranged in a symmetrical structure, but the connection points formed by its two ends with 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 asymmetrical structure, but its two ends are coplanar with the connection points formed by the first connecting portion 132 and the second connecting portion 134. Figure 6 In (d), the folded portion 133 may be provided in an asymmetrical structure, and the connection points formed by its two ends with the first connection portion 132 and the second connection portion 134 are not coplanar.

[0080] Based on the above 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 illustrative description.

[0081] Combine Figure 7 In the vibration direction of the transducer 12, the recessed area 135 may have a depth H; in a direction perpendicular to the vibration direction of the transducer 12, the recessed area 135 may have a width W1 of half the depth, and a spacing distance W2 may be provided between the first connecting portion 132 and the second connecting portion 134. Wherein, 0.2≤W1 / W2≤0.6, which can ensure the size of the deformable area on the folded portion 133 while avoiding structural interference between the folded portion 133 and the first connecting portion 132 and / or the movement housing 11. Similarly, 0.2≤H / W2≤1.4, which can ensure the size of the deformable area on the folded portion 133, making it sufficiently flexible, while avoiding structural interference between the folded portion 133 and the first connecting portion 132 and / or the movement housing 11, and preventing the folded portion 133 from vibrating due to its excessive weight.

[0082] 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.

[0083] Furthermore, 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. One end of the first transition section 1331 and the second transition section 1332 may be connected to the first connecting portion 132 and the second connecting portion 134, respectively, and extend toward each other; one end of the third transition section 1333 and the fourth transition section 1334 may be connected to the other end of the first transition section 1331 and the second transition section 1332, respectively; and both ends of the fifth transition section 1335 may be connected to the other end of the third transition section 1333 and the fourth transition section 1334, respectively. In this case, the aforementioned transition sections collectively enclose a recessed area 135. In which, 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. Furthermore, 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 constant 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 constant or gradually increase. In this case, the fifth transition section 1335 can be configured in an arc shape.

[0084] As an example, the fifth transition section 1335 can be configured to be in an arc shape, and the arc radius can 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 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 on the side facing the recessed area 135 and the vibration direction of the transducer 12 can be zero; while the angle between the tangent line of the fourth transition section 1334 on the side facing the recessed area 135 and the vibration direction of the transducer 12 can be a constant value greater than zero. In this case, the fourth transition section 1334 can be tangent to the fifth transition section 1335.

[0085] 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.

[0086] As an example, the first transition section 1331 and the second transition section 1332 can each be configured to be arc-shaped. The arc radius R1 of the first transition section 1331 can be greater than or equal to 0.2 mm, and the arc radius R2 of the second transition section 1332 can be greater than or equal to 0.3 mm, so as to avoid excessive local 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 can include an arc segment and a flat segment connected to each other, the arc segment being connected to the third transition section 1333, and the flat segment being connected to the first connecting portion 132; the second transition section 1332 can also be similar to the first transition section 1331.

[0087] 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.

[0088] Combine Figure 7 and Figure 5In the vibration direction of the transducer device 12, the distance from the connection point between the folded portion 133 and the first connecting portion 132 (e.g., point 7A) 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 center area of ​​the spring leaf 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 to facilitate adjustment of the specific location where the folded portion 133 is connected to the first connecting portion 132. Furthermore, 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 to facilitate adjustment of the specific location 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.

[0089] 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 connection point and the outer end surface. In this way, while maximizing the stability of the magnetic circuit system 122, sufficient volume can be reserved for the rear cavity 112 to enhance the acoustic performance of the movement module 10. The position and size of the sound hole 113 on the movement housing 11 can also be adjusted to provide sufficient design space for flexible placement of the sound hole 113.

[0090] 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, distance d1 can also be considered as the distance between the second connecting portion 134 and the bottom plate 1223, distance d2 can also be considered as the distance between the spring piece 124 and the bottom plate 1223, and distance d3 can also be considered as the distance between the geometric center of the magnet 1222 and the bottom plate 1223. In one specific embodiment, d1 = 2.85 mm, d2 = 4.63 mm, and d3 = 1.78 mm.

[0091] Furthermore, 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.

[0092] Combine Figure 8 and Figure 2 , the movement module 10 may also include a sound-conducting component 14 connected to the movement shell 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 actual output position of the earphone 100 from the rear end surface of the movement shell 11 relative to its skin contact area (such as the area where the rear bottom plate 1151 is located), so as to improve the anti-phase cancellation caused by possible sound leakage at the rear bottom plate 1151 on the sound at the sound outlet 113. In this way, when the user wears the earphone 100, the user can better hear the above-mentioned air-conducted sound.

[0093] Generally, to ensure sound quality, the frequency response curve should be relatively flat over a wide frequency band, meaning the resonance peak should be located at a higher frequency as much as possible. 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. The peak resonance frequency of this resonance peak can be greater than or equal to 1 kHz. Preferably, the peak resonance frequency can be greater than or equal to 2 kHz, so that the earphone 100 has a better voice output effect. More preferably, the peak resonance frequency can be greater than or equal to 3.5 kHz, so that the earphone 100 has a better music output effect. The peak resonance frequency can further be greater than or equal to 4.5 kHz.

[0094] Based on the above description, the sound guide channel 141 is connected to the rear cavity 112 through the sound outlet 113, forming a typical Helmholtz resonance cavity structure. Based on the Helmholtz resonance cavity model, the resonant frequency f and the volume V of the rear 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 resonant frequency, thereby moving the above-mentioned air-conducted sound to high frequencies as much as possible.

[0095] As an example, the length of the sound-conducting channel 141 can be less than or equal to 7 mm. Preferably, the length of the sound-conducting channel 141 can 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 surface of the movement housing 11 facing away from the skin contact area can be greater than or equal to 3 mm. This prevents the sound leakage generated by the rear end surface of the movement housing 11 from canceling out the phase of the air-conducted sound at the outlet end of the sound-conducting channel 141.

[0096] 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 gradually increase along the transmission direction of the air-conducted sound (i.e., in the direction away from the sound outlet 113), so that the sound-guiding channel 141 can be configured in a trumpet shape; and can extend toward the front housing 116 to facilitate guiding the air-conducted sound. The cross-sectional area of ​​the entrance end of the sound-guiding channel 141 can be greater than or equal to 10 mm 2 Alternatively, the cross-sectional area of ​​the outlet end of the sound-guiding channel 141 may be greater than or equal to 15mm 2 .

[0097] 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.

[0098] In a specific embodiment, the sound guiding channel 141 can be configured in a trumpet shape. The length of the sound guiding channel 141 can be 2.5 mm, and the cross-sectional areas of the inlet and outlet ends of the sound guiding channel 141 can be 15 mm respectively. 2 , 25.3mm 2 Furthermore, the volume of the rear cavity 112 may be 350 mm 3 .

[0099] Combine 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 arrangement. Obviously, the above-mentioned air-conducted sound will have certain differences depending on the structural differences of the sound guide channel 141. Specifically:

[0100] 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.

[0101] for Figure 8 In (b), the sound output direction of the sound-conducting channel 141 points to the user's auricle, so that the above-mentioned air-conducted sound is more easily collected by the auricle and enters the ear canal, thereby optimizing the intensity of the above-mentioned air-conducted sound.

[0102] for Figure 8 In (c), the sound output direction of the sound-guiding channel 141 is also directed toward the user's ear canal, which can also optimize the intensity of the aforementioned air-conducted sound. At the same time, the outlet of the sound-guiding channel 141 adopts an oblique outlet design. This oblique outlet ensures that the actual outlet area of ​​the sound-guiding channel 141 is not limited by the cross-sectional area of ​​the sound-guiding channel 141, which is equivalent to increasing the cross-sectional area of ​​the sound-guiding channel 141, thereby facilitating the output of the aforementioned air-conducted sound.

[0103] for Figure 8 As for (d), the wall surface of the sound guiding channel 141 is flat, which facilitates demolding during the manufacturing process.

[0104] 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.

[0105] 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 or outlet 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 inlet end of the sound-guiding channel 141 (e.g., point 8A) and the geometric center of the outlet end (e.g., point 8B); then connect the aforementioned geometric centers to form a line segment 8A-8B, and the length of this line segment can be simply regarded as the length of the sound-guiding channel 141. Correspondingly, a curved sound-guiding channel refers to a channel where one of the inlet and outlet ends of the sound-guiding channel 141 cannot be observed from the other end, or only a portion of the other can be observed. In this case, 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 is further determined (for example, points 8C1 and 8C2), 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 guide channel 141.

[0106] Combine Figure 2 The outlet end of the sound-conducting channel 141 is generally covered with an acoustic impedance mesh 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 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, making the frequency response curve smoother and the listening effect 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 mesh 140 can be less than or equal to 260MKSrayls. Specifically, the porosity of the acoustic impedance mesh 140 can be greater than or equal to 13%; and / or the pore size can be greater than or equal to 18μm.

[0107] As an example, combining Figure 9, the acoustic resistance 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 resistance of the acoustic resistance net 140. Based on this, every four intersecting gauze wires among the multiple gauze wires arranged longitudinally and transversely can be used to form 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 distance between any two adjacent gauze wires, such as the side length of the pore.

[0108] Furthermore, the effective area of ​​a specific through hole or opening introduced below in this 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 area of ​​the outlet end of the through holes such as the pressure relief hole and the sound adjustment hole mentioned below can also be defined as the product of the actual area and the corresponding porosity, which will not be repeated here.

[0109] Based on the above description, in addition to hearing bone-conducted sound, the user primarily hears air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 and the sound-conducting channel 141, rather than 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.

[0110] 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 diaphragm 13 vibrating, and thus the acoustic performance of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 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 table below, 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 113. In this application, an acoustic resistance of 0 can be simply regarded as not being covered with an acoustic resistance net.

[0111]

[0112]

[0113] Combine Figure 10 As 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 in the low frequency band or the mid-low frequency band is significantly increased; as the acoustic 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, causing the mid-low frequency of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 to decrease, and the frequency response curve is relatively flat.

[0114] By adjusting the actual outlet area of ​​the pressure relief hole 114 and the acoustic impedance of the acoustic resistance mesh 1140 covering it, it is possible to combine pressure relief holes 114 of varying sizes with acoustic resistance meshes 1140 of varying acoustic impedances, thereby ensuring that the frequency response curves of the air-conducted sound output to the exterior of the earphone 100 through the sound outlet 113 are substantially consistent. Specifically, if an acoustic resistance mesh 1140 with a porosity of 14% can be simply considered a single-layer mesh, then an acoustic resistance mesh 1140 with a porosity of 7% can be simply considered a double-layer mesh.

[0115]

[0116] Combine Figure 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 network should be, so that the effective area of ​​the outlet of the pressure relief hole 114 can be roughly consistent, so that the degree of air discharge of the front cavity 111 is roughly the same, and thus the frequency response curve of the air conduction sound output to the outside of the earphone 100 through the sound outlet 113 is roughly consistent. However, combined with Figure 12 Although the frequency response curves of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 are generally consistent, the frequency response curves of the air-conducted sound output to the outside of the earphone 100 through the pressure relief hole 114 are 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. 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 , and 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.

[0117] 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, for example, three as described below.

[0118] Based on the above detailed description, the effective area of ​​the outlet end of the sound guiding channel 141 can 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. Particularly, based on the definition of effective area, the actual area of ​​the outlet end of the sound guiding channel 141 can be larger than the actual area of ​​the outlet end of each pressure relief hole 114. Furthermore, the effective area of ​​the outlet end of the sound guiding channel 141 can be greater than or equal to the sum of the effective areas of the outlet ends of all pressure relief holes 114. Particularly, the ratio between the sum of the effective areas of the outlet ends of all pressure relief holes 114 and the effective area of ​​the outlet end of the sound guiding channel 141 can be greater than or equal to 0.15. As an example, the effective area of ​​the outlet end of all pressure relief holes 114 can be greater than or equal to 2.5mm 2 In this way, the front cavity 111 is ensured to be exhausting smoothly, thereby facilitating improvement of the acoustic performance of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 and reducing sound leakage at the pressure relief hole 114 .

[0119] 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 can be greater than or equal to 8mm 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 10mm 2 When there is only one pressure relief hole 114, the sum of the actual areas of the outlet ends of all pressure relief holes 114 is the actual area of ​​the outlet end of one pressure relief hole 114; the same is true for the sound adjustment hole 117. In a specific embodiment, the actual area of ​​the outlet end of the sound guide channel 141 can be 25.3mm 2 The pressure relief holes 114 may be provided with three, 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 .

[0120] Furthermore, the outlet end of the sound-conducting channel 141 may be covered with an acoustic resistance mesh 140, and at least a portion of the outlet end of the pressure relief hole 114 may be covered with an acoustic resistance mesh 1140. The porosity of the acoustic resistance mesh 1140 may be less than or equal to the porosity of the acoustic resistance mesh 140. In one specific embodiment, the porosity of the acoustic resistance mesh 140 may be greater than or equal to 13%, and the porosity of the acoustic resistance mesh 1140 may be greater than or equal to 7%.

[0121] Based on the above description, the sound guide channel 141 is connected to the back cavity 112 through the sound outlet 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. Figure 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 back cavity 112. Furthermore, when the Helmholtz resonance cavity structure resonates, it can be considered that a standing wave appears in the back cavity 112. The wavelength of the standing wave corresponds to the size of the back cavity 112. For example, the deeper the back cavity 112, that is, the longer the distance between the low-pressure area and the high-pressure area, the longer the wavelength of the standing wave, resulting in a lower resonant frequency of the Helmholtz resonance cavity structure. Based on this, combined with Figure 13 In (b), by destroying the high-pressure area, for example by providing a through hole in the high-pressure area that connects to the rear cavity 112, the sound that would have been reflected in the high-pressure area is prevented from reflecting, thereby preventing the formation of the aforementioned standing wave. In this case, when the Helmholtz resonant cavity structure resonates, the high-pressure area in the rear cavity 112 will move inward toward the low-pressure area, shortening the wavelength of the standing wave and thereby increasing the resonant frequency of the Helmholtz resonant cavity structure.

[0122] Combine Figure 2 The movement housing 11 may also be provided with a sound-tuning hole 117 communicating with the rear cavity 112. Under the same conditions, the sound-tuning hole 117 located in the high-pressure area of ​​the rear cavity 112 can most effectively disrupt the high-pressure area. Of course, the sound-tuning hole 117 may also be located in any area between the high-pressure and low-pressure areas of the rear cavity 112. As an example, the sound-tuning hole 117 may be located in the rear housing 115 and may be located on either side of the transducer device 12 relative to the sound outlet 113 and its sound-conducting component 14.

[0123] Further, combined with Figure 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. Referring to the table below, when the acoustic resistance net is not installed, adjusting the actual area of ​​the outlet of the sound-tuning hole 117 can control the degree of damage to the high-pressure area, thereby adjusting the peak resonant frequency of the resonance peak. A zero actual area at the outlet of the sound-tuning hole 117 indicates that the sound-tuning hole 117 is closed.

[0124] Frequency response curve <![CDATA[Actual area / mm 2 > 14-1 0 14-2 1.7 14-3 2.8 14-4 28.44

[0125] Combine Figure 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 to the peak resonance frequency of the resonance peak when the sound-tuning hole 117 is in the closed state, and the shift amount can be greater than or equal to 500Hz. Preferably, the aforementioned shift amount 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 can be greater than or equal to 2kHz, so that the earphone 100 has a better voice output effect. 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 also be further greater than or equal to 4.5kHz.

[0126] 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.

[0127] Similarly, in addition to hearing bone-conducted sound, the user primarily hears air-conducted sound output to the outside of the earphone 100 through the sound outlet 113, rather than air-conducted sound output to the outside of the earphone 100 through the sound adjustment vent 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 vent 117.

[0128] Combine Figure 14 and Figure 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 113 to shift downward as a whole. Figure 2 At least a portion of the outlet ends of the sound-tuning holes 117 can be covered with an acoustic resistance mesh 1170 to minimize sound leakage from the sound-tuning holes 117 while reducing the high-pressure area within the rear cavity 112. In conjunction with the table below, adjusting the effective area of ​​the outlet ends of the sound-tuning holes 117, such as the actual area of ​​the outlet ends of the sound-tuning holes 117 and / or the acoustic resistance of the acoustic resistance mesh 1170 covering them, can change the amount of air-conducted sound output to the outside of the earphone 100 through the sound outlet 113.

[0129] Frequency response curve Acoustic Resistance / MKSrayls 15-1 No tuning hole 15-2 0 15-3 145

[0130] Combine Figure 15The addition of an acoustic resistance mesh 1170 at the outlet of the tuning hole 117 ensures that there is no significant reflected sound at the tuning hole 117 within the rear cavity 112 (i.e., no standing waves and no hard sound field boundary), shifting the high-pressure area within the rear cavity 112 inward. It also prevents sound leakage from the tuning hole 117 to a certain extent, allowing more sound to be output to the outside of the earphone 100 through the sound outlet 113. Furthermore, the peak resonance intensity in the mid- and low-frequency bands is significantly increased, increasing the volume of air-conducted sound; the peak resonance intensity in 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 more balanced at high frequencies.

[0131] Based on the above detailed description, the effective area of ​​the outlet end of the sound guiding channel 141 can 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. In particular, based on the definition of effective area, the actual area of ​​the outlet end of the sound guiding channel 141 can 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 can be larger than the sum of the effective areas of the outlet ends of all sound tuning holes 117. In particular, the ratio between the sum of the effective areas of the outlet ends of all sound tuning holes 117 and the effective area of ​​the outlet end of the sound guiding channel 141 can be greater than or equal to 0.08. As an example, the sum of the effective areas of the outlet ends of all sound tuning holes 117 can be greater than or equal to 1.5mm 2 When there is only one sound-tuning hole 117 , the sum of the effective areas of the outlets of all sound-tuning holes 117 is equal to the effective area of ​​the outlet of one sound-tuning hole 117 ; the same is true for the pressure relief hole 114 . This allows the peak resonant frequency of the resonance peak of the air-conducted sound output to the outside of the earphone 100 through the sound outlet 113 to be shifted toward higher frequencies as much as possible, while also reducing sound leakage from the sound-tuning hole 117 .

[0132] As an example, the sum of the actual areas of the outlet ends of all the sound-tuning holes 117 may be greater than or equal to 5.6 mm. 2 In a specific embodiment, two sound-adjusting holes 117 may be provided, such as the first sound-adjusting hole 1171 and the second sound-adjusting hole 1172 mentioned later, and the actual area of ​​the outlet ends thereof may be 7.6 mm 2 , 5.6mm 2 .

[0133] Furthermore, the outlet end of the sound-guiding channel 141 may be covered with an acoustic resistance mesh 140, and the outlet ends of at least some of the sound-tuning holes 117 may be covered with an acoustic resistance mesh 1170. The porosity of the acoustic resistance mesh 1170 may be less than or equal to the porosity of the acoustic resistance mesh 140. In one specific embodiment, the porosity of the acoustic resistance mesh 140 may be greater than or equal to 13%, and the porosity of the acoustic resistance mesh 1170 may be less than or equal to 16%.

[0134] Based on the above description, for the pressure relief hole 114 and the sound outlet hole 113, the phases of the air-conducted sounds output 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 output 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 adjustment 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 adjustment hole 117 can preferably be 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 adjustment hole 117 is as far away from the sound outlet hole 113 as possible.

[0135] Furthermore, since the pressure relief holes 114 are connected to the front cavity 111 and the tuning holes 117 are connected to the rear cavity 112, the phases of the air-conducted sounds output to the outside of the earphone 100 through the pressure relief holes 114 and the tuning holes 117 are opposite, and thus the sound leakage from the pressure relief holes 114 and the tuning holes 117 can be reduced by coherent cancellation. Based on this, at least some of the pressure relief holes 114 and at least some of the tuning holes 117 can be arranged adjacent to each other to create conditions for coherent cancellation. In order to better achieve coherent cancellation of the sound leakage from the pressure relief holes 114 and the tuning holes 117, the spacing 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 holes 114 and the tuning holes 117 is less than or equal to 2 mm. In addition, the peak resonance frequency and / or peak resonance intensity of the resonance peaks of the air-conducted sounds output to the outside of the earphone 100 through the pressure relief holes 114 and the tuning holes 117 should also be matched as much as possible. However, in actual product design, due to the influence of specific structure and process tolerances, 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 that the peak resonance frequency and / or peak resonance intensity of the resonance peaks of the above-mentioned two air-conducted sounds do not differ too much.

[0136] Combine Figure 16The frequency response curve of the air-conducted sound output to the outside of the earphone 100 through the pressure relief vent 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 vent 117 has a second resonance peak f2. According to the table below, the peak resonant frequency of the first resonance peak and the peak resonant frequency of the second resonance peak can each be greater than or equal to 2 kHz, and |f1-f2| / f1≤60%. As the difference between the peak resonant frequency of the first resonance peak and the peak resonant frequency of the second resonance peak gradually decreases, the bandwidth for sound leakage reduction becomes wider, that is, the frequency response curve becomes relatively flatter, which manifests as reduced sound leakage from the earphone 100. This also means that the coherent cancellation effect of the air-conducted sound output to the outside of the earphone 100 through the pressure relief vent 114 and the tuning vent 117, respectively, is also improved. Preferably, the peak resonant frequency of the first resonance peak and the peak resonant frequency of the second resonance peak can each be greater than or equal to 3.5 kHz, and |f1-f2|≤2 kHz. 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 out in the high frequency band as much as possible.

[0137] Frequency response curve Peak resonant frequency of f1 / Hz Peak resonant frequency of f2 / Hz 16-1 3500 5600 16-2 4500 5600 16-3 5000 5600

[0138] Furthermore, since the front cavity 111 is provided with structural components such as the coil support 121 and the spring sheet 124, the wavelength of the standing wave in the front cavity 111 is relatively long; the sound-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 lower 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 hole 114 and the sound tuning hole 117 can 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 hole 114 and the sound tuning hole 117 can be larger than the actual area of ​​the outlet end of the sound tuning hole 117. Furthermore, the outlet ends of the adjacent pressure relief hole 114 and the sound tuning hole 117 can be covered with an acoustic resistance net 1140 and an acoustic resistance net 1170, respectively, and the porosity of the acoustic resistance net 1140 can be greater than the porosity of the acoustic resistance net 1170.

[0139] Combine Figure 17In (a), the pressure relief hole 114 may include a first pressure relief hole 1141 and a second pressure relief hole 1142. Specifically, the first pressure relief hole 1141 may be arranged farther away from the sound outlet 113 than the second pressure relief hole 1142. At this time, the effective area of ​​the outlet end of the first pressure relief hole 1141 may 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 requirements 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 impact of sound leakage at the pressure relief hole 114 on the air-conducted sound at the sound outlet 113. Furthermore, the pressure relief hole 114 may also include a third pressure relief hole 1143, and the first pressure relief hole 1141 may also be arranged farther away from the sound outlet 113 than the third pressure relief hole 1143. Specifically, the effective area of ​​the outlet end of the second pressure relief hole 1142 may be larger than the effective area of ​​the outlet end of the third pressure relief hole 1143.

[0140] As an example, combining Figure 17 (a) and Figure 2 The sound outlet hole 113 and the first pressure relief hole 1141 can be located on opposite sides of the transducer device 12; and the second pressure relief hole 1142 and the third pressure relief hole 1143 can be arranged opposite to each other and can be located between the sound outlet hole 113 and the first pressure relief hole 1141.

[0141] Furthermore, at least part of the outlet end of the pressure relief hole 114 can be covered with an acoustic resistance net 1140 to facilitate adjustment of the effective area of ​​the outlet end of the pressure relief hole 114. In this embodiment, the outlet ends of the pressure relief hole 114 are respectively covered with acoustic resistance nets 1140 of the same acoustic resistance as an example for illustrative 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 being mixed due to too many specifications and types. Based on this, the corresponding effective area can be obtained by adjusting the actual area of ​​the outlet end of the pressure relief hole 114. For example: the actual area of ​​the outlet end of the first pressure relief hole 1141 can be larger 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 larger than the actual area of ​​the outlet end of the third pressure relief hole 1143.

[0142] Combine Figure 17In (b), the sound tuning hole 117 may include a first sound tuning hole 1171 and a second sound tuning hole 1172. Specifically, the first sound tuning hole 1171 may be arranged farther away from the sound outlet 113 than the second sound tuning hole 1172. At this time, the effective area of ​​the outlet end of the first sound tuning hole 1171 may be larger than the effective area of ​​the outlet end of the second sound tuning hole 1172, so as to facilitate destruction of the high-pressure zone in the rear cavity 112. In this way, it is possible to take into account both the size of the movement housing 11 and the need for the sound tuning hole 117 to destroy the high-pressure zone in the rear cavity 112, and to make the resonant frequency of the air-conducted sound at the sound outlet 113 as high as possible, while also making the first sound tuning hole 1171, which has a relatively large degree of destruction, as far away from the sound outlet 113 as possible.

[0143] As an example, combining Figure 17 (b) and Figure 2 The sound outlet hole 113 and the first sound tuning hole 1171 may be located on 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 .

[0144] 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. In this embodiment, the outlet ends of the sound tuning hole 117 are respectively covered with acoustic resistance nets 1170 of the same acoustic resistance as an example for illustrative description. In this way, not only the acoustic performance and waterproof and dustproof performance of the earphone 100 can be improved, but also the acoustic resistance net 1170 can be prevented from being mixed due to too many specifications and types. Based on this, the corresponding effective area can be obtained by adjusting the actual area of ​​the outlet end of the sound tuning hole 117. 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 .

[0145] As an example, combining Figure 17 In (c) and (d), the first pressure relief hole 1141 and the first sound tuning hole 1171 can be positioned adjacent to each other, and the second pressure relief hole 1142 and the second sound tuning hole 1172 can also be positioned adjacent to each other. This allows 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, to coherently cancel each other, 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, respectively, to coherently cancel each other.

[0146] 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 resonant frequency of the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 is shifted to a higher frequency as much as possible, so as to be as close as possible to the peak resonant frequency of the air-conducted sound output to the outside of the earphone 100 through the first sound tuning hole 1171. This further enables 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 to 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 further described here.

[0147] 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 resonant frequency of the air-conducted sound output to the outside of the earphone 100 through the first pressure relief hole 1141 to shift to a 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. The offset can be greater than or equal to 500 Hz, and the peak resonant frequency of the resonance peak can be greater than or equal to 2 kHz. Preferably, the offset is greater than or equal to 1 kHz. Similarly, the peak resonant 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 a 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 adjacent to the sound-tuning hole 117 has a resonance peak. When the pressure relief holes 114 other than the pressure relief hole 114 adjacent to the sound-tuning hole 117 are open, the peak resonance frequency of the resonance peak shifts toward a higher frequency compared to the peak resonance frequency of the resonance peak when the other pressure relief holes 114 are closed. The peak resonance frequency of the resonance peak when the other pressure relief holes 114 are open can be greater than or equal to 2 kHz.

[0148] Combine Figure 17 and Figure 2The core housing 11 may include a first sidewall 17A and a second sidewall 17B located on opposite sides of the transducer device 12, as well as a third sidewall 17C and a fourth sidewall 17D connecting the first sidewall 17A and the second sidewall 17B and spaced apart from each other. In short, the core housing 11 can be simplified as a rectangular frame. Of course, the third sidewall 17C and the fourth sidewall 17D may also be arranged in an arc shape, so that the core housing 11 as a whole has a runway-like configuration. The first sidewall 17A is closer to the human ear than the second sidewall 17B, and the third sidewall 17C is closer to the earhook assembly 20 than the fourth sidewall 17D. Furthermore, the sound outlet 113 may be provided on the first sidewall 17A to facilitate the user's hearing of the air-conducted sound output to the exterior 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 may be provided on the second sidewall 17B, respectively, so that they are further away from the sound outlet 113. Accordingly, the second pressure relief hole 1142 and the second sound tuning 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.

[0149] Based on the above description, combined with Figure 2 and Figure 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 respectively 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, which 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 the material and improving the appearance quality of the earphone 100 .

[0150] As an example, combining Figure 18The outer surface of the core housing 11 can be provided with a receiving area 118, which can be connected to the outlet ends of the adjacent pressure relief hole 114 and the sound adjustment hole 117. In this case, the protective cover 15 can be provided in a plate shape and can be fixed in the receiving area 118 by one or a combination of connection methods such as snapping, gluing, welding, etc., for example, by gluing or welding to the bottom of the receiving area 118 to cover the pressure relief hole 114 and the sound adjustment hole 117. The outer surface of the protective cover 15 can be flush with the outer surface of the core housing 11 or have a circular transition to improve the appearance quality of the earphone 100.

[0151] 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 an 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 bent and connected to the edge of the main cover plate 151 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 into 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 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 151.

[0152] Based on the above description, combined with Figure 18 and Figure 2, the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 can also be covered with an acoustic resistance net 1140 and an acoustic 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 acoustic resistance net 1140 and the acoustic resistance net 1170 can first be fixed to the top of the boss 1181 through the first annular film 1183, and the protective cover 15 can then be 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 to the acoustic resistance net 1140 and the acoustic resistance net 1170 through the second annular film 1184. The ring widths of the first annular film 1183 and the second annular film 1184 can be respectively between 0.4 mm and 0.5 mm, and the thicknesses can be respectively less than or equal to 0.1 mm. Of course, in some other embodiments, the acoustic resistance net 1140 and the acoustic resistance net 1170 can also be fixed to 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. The acoustic resistance net 1140 and the acoustic resistance net 1170 can be at least partially staggered with each other, so as to cover the outlet ends of the adjacent pressure relief hole 114 and the sound adjustment hole 117 respectively, and to facilitate the adaptation of the spacing distance between the two.

[0153] 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.

[0154] Combine Figure 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 fastening direction of the rear housing 115 and the front housing 116. In other words, Figure 4 For the front shell 116, the side of its front cylindrical side plate 1162 adjacent to the sound outlet 113 or the sound-conducting component 14 can be at least partially cut off to form an escape zone for the exposed coil holder 121. Furthermore, the sound-conducting component 14 can be snapped onto the exposed portion of the coil holder 121 and the outside of the rear shell 115, and the sound channel 141 can be connected to the sound outlet 113. In this way, the side of the front shell 116 adjacent to the sound-conducting component 14 does not need to completely wrap the coil holder 121, which can avoid the movement module 10 from being locally too thick, and does not hinder the fixation between the sound-conducting component 14 and the movement shell 11.

[0155] As an example, the exposed part of the coil support 121 and the outer side surface of the rear shell 115 can cooperate to form a boss 119. 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 113 can be entirely provided in the rear shell 115, and the outlet end of the sound outlet 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-guiding component 14 facing the coil support 121 and the rear shell 115. At this time, the inlet end of the sound-guiding channel 141 can be connected to the bottom of the recessed area 142. In this way, when the sound-guiding component 14 is assembled with the movement shell 11, the boss 119 can be embedded in the recessed area 142, and the sound outlet channel 141 is connected to the sound outlet 113. In combination 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 the bottom of the recessed area 142, the end surface of the sound guide component 14 and the movement housing 11 are in direct contact, or a gap is left between them, thereby improving the airtightness between the sound guide channel 141 and the sound outlet 113. Based on this, an annular seal (not shown in the figure) can also be provided between the top of the boss 119 and the bottom of the recessed area 142.

[0156] Furthermore, one of the rear housing 115 and the sound guide component 14 may be provided with a connector jack 1154; correspondingly, the other may be provided with a connector post 143. Connector post 143 can be inserted and fixed within connector jack 1154 to improve the precision and reliability of assembly between the sound guide component 14 and the movement housing 11. For example, connector jack 1154 is provided on the rear housing 115, specifically on the first sub-boss 1191; connector post 143 is provided on the sound guide component 14, specifically on the recessed area 142.

[0157] It should be noted that: Figure 19 The sound guide component 14 and the core shell 11 can be along Figure 19 Assemble in the direction shown by the dotted line.

[0158] In some embodiments, for example, if the movement module 10 is not provided with a diaphragm 13, the front housing 116 can press the coil support 121 against the annular support 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 against the annular support 1153.

[0159] In other embodiments, for example, if the movement module 10 is provided with a diaphragm 13, the front housing 116 can press and hold the coil support 121 and the diaphragm 13 connected thereto together on the annular support 1153 to improve the assembly reliability of the movement module 10. The diaphragm 13 can be connected to the other end of the second cylindrical support portion 1213, which is away from the annular main body 1211, via its reinforcement ring 136. Specifically, the front housing 116 can press and hold the reinforcement ring 136 against the annular support 1153 via the second cylindrical support portion 1213.

[0160] As an example, combining Figure 19 and Figure 4 The sound-tuning hole 117 can be provided as a complete through-hole in the rear housing 115, while the pressure-relief hole 114 can be provided as an incomplete notch in the front housing 116. The complete through-hole is formed by joining the rear housing 115 and the front housing 116. This not only reduces the distance between the adjacent pressure-relief holes 114 and the sound-tuning hole 117, but also makes the actual outlet area of ​​the pressure-relief hole 114 larger than the actual outlet area of ​​the sound-tuning hole 117.

[0161] Further, combined with Figure 29 and Figure 2 , a connecting hole 1215 can be provided at the connection between the annular main body 1211 and the first cylindrical bracket part 1212, so that the air in the front cavity 111 does not need to bypass the coil bracket 121 and the coil 123 during the discharge process, but directly passes through the coil bracket 121. This not only increases the exhaust efficiency of the front cavity 111, but also reduces 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 can also all be located in the annular main body 1211 or the first cylindrical bracket part 1212. Furthermore, the number of the connecting holes 1215 can be multiple, and they are arranged at circumferential intervals along the coil assembly. Among them, the cross-sectional area of ​​each connecting hole 1215 can be greater than or equal to 2 mm 2 As an example, the cross-sectional area of ​​the connecting hole 1215 adjacent to the first pressure relief hole 1141 may be greater than or equal to 3 mm. 2 The cross-sectional area of ​​the communicating hole 1215 adjacent to the second pressure relief hole 1142 and the third pressure relief hole 1143 can be greater than or equal to 2.5 mm 2 .

[0162] Combine Figure 1 The earphone 100 may include two core modules 10, which may be located on the left and right sides of the user's head when the earphone 100 is in the wearing state. Figure 20 and Figure 21, this embodiment can be defined as follows: when the earphone 100 is in the 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 Figure 20 As shown; the one located on the right side of the user's head is the right earphone core module, for example Figure 21 As shown. Furthermore, in addition to the transducer 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 user's general usage habits, 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.

[0163] As an example, combining Figure 20 The movement module 10 may include a function button 16 disposed in the accommodating cavity of the movement housing 11. The function button 16 may be exposed from the rear housing 115 to facilitate receiving a user's pressing operation. The triggering direction of the function button 16 may be substantially consistent with the vibration direction of the transducer 12.

[0164] As an example, combining Figure 21 The movement module 10 may include a first microphone 171 disposed within the housing of the movement housing 11. 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 12 may be between 65 and 115 degrees. This prevents mechanical resonance of the first microphone 171 with the vibration of the transducer 12, thereby improving the sound pickup effect of the movement module 10.

[0165] Furthermore, the core module 10 may also include a second microphone 172 disposed in the accommodating cavity of the core housing 11, and the second microphone 172 may be capable of collecting sounds outside the core module 10. The angle between the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171 may be between 65 and 115 degrees. Thus, the second microphone 172 and the first microphone 171 may receive two different sounds respectively, or 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) integrated on the main control circuit board 40. The processing circuit may use the first microphone 171 as a main microphone, for example, for collecting the user's voice, and the second microphone 172 as an auxiliary microphone, for example, for collecting the ambient sound of the user's environment, and perform noise reduction processing on the sound signal collected by the first microphone 171 through the sound signal collected by the second microphone 172. The first microphone 171 and the second microphone 172 may be soldered on the same flexible circuit board to simplify the wiring structure of the core 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 .

[0166] 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. Figure 20 (or Figure 21 )and Figure 2 The movement module 10 may further include a partition 18 disposed within the rear cavity 112 to separate the auxiliary components from the rear cavity 112, minimizing the impact of the auxiliary components on the space surrounding the rear cavity 112. This allows the walls of the rear cavity 112 to be as smooth and rounded as possible, thereby improving the acoustic performance of the air-conducted sound of the earphone 100. In this case, the transducer 12 is located on the side of the partition 18 facing the front cavity 111.

[0167] 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 171 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 prevent the transducer 12 from colliding with the first microphone 171 during working vibration, thereby increasing the reliability of the core module 10. 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.

[0168] 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. This ensures that the air-conducted sound output by the left and right earphone core modules respectively have similar frequency response curves, thereby improving the acoustic performance of the earphone 100.

[0169] 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%.

[0170] Furthermore, the second sub-rear cavity 1122 can be filled with a colloid (not shown). The colloid can fill the second sub-rear cavity 1122 at a rate greater than or equal to 90%, making the second sub-rear cavity 1122 as solid as possible. This prevents the second sub-rear cavity 1122 from being hollow and causing acoustic resonance with the first sub-rear cavity 1121, thereby improving the acoustic performance of the earphone 100.

[0171] 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 adhesive that cures under the action of light. The partition 18 can be pre-fixed to the rear housing 115 using hot melt pins. Furthermore, the gap between the side of the partition 18 and the rear housing 115 can also be filled with light-curing adhesive. Similarly, the groove of the rear cylindrical side panel 1152 can also be filled with light-curing adhesive or other colloid after accommodating the second microphone 172.

[0172] Further, combined with Figure 20 (or Figure 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 apart from the partition 18 to prevent the two from colliding when the transducer device 12 is working. In addition, the distance between the center area of ​​the outer end surface of the magnetic shield 1221 and the partition 18 can be greater than the 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 center 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 center 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.

[0173] Combine Figure 22 and Figure 1 The ear hook assembly 20 may include a storage compartment 21, a bent transition portion 22, and a core fixing portion 23. The storage compartment 21 may be used to accommodate the main control circuit board 40 or the battery 50, the core fixing portion 23 may be used to fix the core module 10, and the bent transition portion 22 connects the storage compartment 21 and the core fixing portion 23. Furthermore, the bent transition portion 22 may be configured in a bent shape to facilitate the ear hook assembly 20 to be hung between the user's ear and head.

[0174] For example, the housing 21 and the movement fixing portion 23 can each be made of plastic, and the bent transition portion 22 can be embedded with an elastic wire. The elastic wire and the plastic can be integrally connected using a metal insert molding process. The surface of the ear hook assembly 20 can be an elastic coating to improve the wearing comfort of the earphone 100.

[0175] As an example, the storage compartment 21 may include a main compartment body 211 and a cover plate 212. Figure 23 The main compartment body 211 is used to form a receiving space with an open end (not marked in the figure), and the cover plate 212 can be covered on the open end of the main compartment body 211. Figure 24The open end of the main chamber body 211 can be provided with an outer end surface 2111, an inner side surface 2112, and a transition surface 2113 that obliquely connects the outer end surface 2111 and the inner side surface 2112. When the cover plate 212 is provided on the open end of the main chamber body 211, the cover plate 212 and at least a portion of the transition surface 2113 are spaced apart to form a glue-holding space 213 for accommodating the colloid between the cover plate 212 and the transition surface 2113. At this time, the cover plate 212 and the main chamber body 211 can be connected via the colloid (not shown) in the glue-holding space 213. Thus, compared to the related art in which a generally annular glue dispensing platform is provided between the outer end surface 2111 and the inner side surface 2112, which is substantially perpendicular to the inner side surface 2112, this embodiment can meet the glue dispensing requirements while ensuring the structural strength of the open end of the main chamber body 211 to the greatest extent, thereby facilitating the thinning and lightening of the overall structure of the main chamber body 211. The wall thickness of the open end of the main chamber body 211 can be between 0.6 mm and 1.0 mm. Of course, in other embodiments, when the cover plate 212 is provided on the open end of the main chamber body 211, the cover plate 212 and the outer end surface 2111 can also be connected by welding. In this case, the open end of the main chamber body 211 does not need to be provided with the transition surface 2113.

[0176] Furthermore, the transition surface 2113 can be a plane, and can be connected to the outer end surface 2111 and the inner side surface 2112 at an obtuse angle respectively. The obtuse angle between the transition surface 2113 and the outer end surface 2111 (for example, θ1) can be smaller than the obtuse angle between the transition surface 2113 and the inner side surface 2112 (for example, θ2). In this way, while ensuring that the volume of the glue-containing space 213 can meet the dispensing requirements, the local wall thickness of the open end of the main warehouse body 211 is guaranteed to the greatest extent, thereby increasing the structural strength of the open end of the main warehouse body 211. As an example, the obtuse angle between the transition surface 2113 and the outer end surface 2111 can be between 110 degrees and 135 degrees; or, the obtuse angle between the transition surface 2113 and the inner side surface 2112 can be between 135 degrees and 160 degrees.

[0177] 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 .

[0178] As an example, combining Figure 23 and Figure 24The 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 placed on the outer end surface 2111 and contact the outer end surface 2111 to serve as a position limiter; the annular flange 2122 may extend into the main housing 211. In this case, a glue-containing space 213 may be formed between the transition surface 2113, the lower surface of the main cover body 2121, and the outer surface of the annular flange 2122. Based on this, the main housing 211 and the cover plate 212 may be assembled in an inverted manner. For example, a glue dispenser may be used to apply an appropriate amount of glue along the circumference of the cover plate 212 between the lower surface of the main cover body 2121 and the outer surface of the annular flange 2122. The ear hook assembly 20 may then be inverted onto the cover plate 212 through the main housing 211 to prevent the glue from overflowing into the main housing 211.

[0179] As an example, combining Figure 23 A main control circuit board 40 may be disposed in the accommodating compartment 21, and a switch assembly 41 may be disposed 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 disposed on the second fixing portion 412. In this case, the first fixing portion 411 may be disposed 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 disposed in contact with the side surface of the main control circuit board 40, and the switch body 413 may be located on the side of the second fixing portion 412 facing away from the main circuit board 40.

[0180] Furthermore, the main cover 2121 may be provided with a button hole 2123, which may be surrounded by an annular flange 2122. Accordingly, the earhook assembly 20 may further include a button assembly 24 fixed to the side of the main cover 2121 facing away from the annular flange 2122. 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. In this case, the direction in which the button assembly 24 presses the switch assembly 41 can be parallel to the main surface of the main control circuit board 40 to prevent deformation of the main circuit board 40 in a direction perpendicular to its main surface.

[0181] As an example, combining Figure 22 and Figure 23The side of the main cover 2121 facing away from the annular flange 2122 may be partially recessed toward the annular flange 2122 to form a placement area 2124, and the button hole 2123 may be disposed within the placement area 2124. Accordingly, the button assembly 24 may include a soft button 241 and a hard button 242 connected to the soft button 241. The soft button 241 is disposed within the placement area 2124 and covers the button hole 2123. When a user presses the hard button 242, the soft button 241 deforms and moves toward the interior of the accommodating compartment 21, avoiding the button hole 2123. This in turn acts on the switch body 413 to trigger the switch assembly 41.

[0182] Furthermore, the soft button 241 may include an integrally connected central raised portion 2411 and an edge connecting portion 2412. The edge connecting portion 2412 is configured to connect to the main cover 2121, and the central raised portion 2411 is configured to connect to the hard button 242. The depth of the placement area 2124 is greater than the thickness of the edge connecting portion 2412 and less than the thickness of the central raised portion 2411. In this case, the soft button 241 and the cover 212 may be integrally connected using a two-shot injection molding process. Since the depth of the placement area 2124 is greater than the thickness of the edge connecting portion 2412, glue overflow during the molding process can be avoided. Of course, in other embodiments, an annular rib surrounding the placement area 2124 may be provided on the side of the main cover 2121 facing away from the annular flange 2122. The height of the annular rib protruding from the main cover 2121 may be approximately 0.05 mm, and the width of the rib may be approximately 0.2 mm, so that it can serve as a glue barrier during the molding process, similarly preventing glue overflow.

[0183] As an example, combining Figure 23 , the number of switch components 41, button holes 2123 and soft buttons 241 can be two respectively, and they are respectively arranged in one-to-one correspondence. 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 connected as one piece. Among them, the number of 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 either of them can also be expanded as the power button of the headset 100.

[0184] Combine Figure 25 and Figure 26The rear hanger assembly 30 may include an elastic wire 31 and a metal connector 32. The metal connectors 32 may be respectively sleeved and fixed to the ends of the elastic wire 31. In this case, the two ends of the rear hanger assembly 30 can be plugged into one end of the earhook assembly 20 (e.g., its storage compartment 21) via their respective metal connectors 32. The deformation of the first portion 311 of the elastic wire 31 located inside the metal connector 32 can be less than or equal to 10% compared to the deformation of the second portion 312 of the elastic wire 31 located outside the metal connector 32. Thus, compared to related art methods that first flatten the ends of the elastic wire and then injection-mold plastic connectors, this embodiment uses metal connectors 32 instead of plastic connectors. This eliminates (or minimizes) deformation of the ends of the elastic wire 31, thereby preventing embrittlement of the ends of the elastic wire 31 due to deformation, thereby increasing the reliability of the rear hanger assembly 30. Furthermore, compared to plastic connectors, the metal connector 32 inherently possesses superior structural strength.

[0185] It should be noted that the deformation described in this embodiment can be calculated as follows: |φ1-φ2| / φ2. φ1 is the cross-sectional dimension along any direction passing through the geometric center of the cross section of the first portion 311, and φ2 is the cross-sectional dimension along the geometric center of the cross section of the second portion 312 and in the same direction as φ1. For example, if the elastic metal wire 31 is a wire material and has not undergone deformation, φ1 and φ2 correspond to the wire diameters of the first portion 311 and the second portion 312, respectively.

[0186] For example, the second portion 312 of the elastic wire 31 can be curved relative to the first portion 311 to facilitate wrapping the rear-mounted assembly 30 around the back of the user's head. Furthermore, the elastic wire 31 can be made of spring steel, titanium alloy, titanium-nickel alloy, chrome-molybdenum steel, etc., and the metal connector 32 can be made of titanium alloy (e.g., nickel-titanium alloy, titanium alloy, beta titanium, etc.), steel alloy (e.g., stainless steel, carbon steel, iron, etc.), copper alloy (e.g., red copper, brass, bronze, and white copper), aluminum alloy, etc.

[0187] 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. Figure 26 The end of the elastic wire 31 can be further exposed from the outer end surface of the metal connector 32, and the welding point between the elastic wire 31 and the metal connector 32 can be formed between the exposed portion of the elastic wire 31 and the outer end surface of the metal connector 32. In short, the metal connector 32 is sleeved on the elastic wire 31 and the end of the elastic wire 31 can be exposed, so that the ends of the two can be welded.

[0188] 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 around the elastic metal wire 31, similar to plastic injection molding.

[0189] Furthermore, whether using a welded or die-cast connection, to increase the bonding strength between the elastic wire 31 and the metal connector 32, the outer surface of the first portion 311 may be provided with a knurled structure (not shown) to increase the contact area between the elastic wire 31 and the metal connector 32. The ratio of the depth of the knurled structure to the cross-sectional dimension of the first portion 311 may be less than or equal to 15%. Preferably, the ratio of the depth of the knurled structure to the cross-sectional dimension of the first portion 311 may be less than or equal to 5%. For example, the depth of the knurled structure may be between 0.2 mm and 0.3 mm.

[0190] As an example, combining Figure 26 and Figure 27 The metal connector 32 can be cylindrical and have a mounting surface 321 parallel to the axis of the metal connector 32. The mounting surface 321 can be planar and extend through both ends of the metal connector 32 along the axis. Since the wires 33 described below are generally wires with a generally circular cross-section, the metal connector 32 can be assembled with the wires 33 via the planar mounting surface 321, facilitating the routing of the rear-mount assembly 30.

[0191] Furthermore, the metal connector 32 may also have an anti-rotation surface 322 that is parallel to the mounting surface 321. In this way, after the rear-hanging component 30 is plugged in and connected to the ear-hook component 20 (for example, its storage compartment 21) through the metal connector 32, the two are not easy to rotate relative to each other. The anti-rotation surface 322 only passes through 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-hook component 20 (for example, its storage compartment 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-hook component 20.

[0192] Furthermore, a stop groove 324 can be provided on the other end of the metal connector 32, away from the stop flange 323. The stop groove 324 can extend through the mounting surface 321 and the anti-rotation surface 322 along one radial direction of the metal connector 32, and two stop grooves 324 can be provided opposite each other along another radial direction of the metal connector 32. This allows the metal connector 32 to form a snap-fit ​​connection with the earhook assembly 20 (e.g., its receiving compartment 21), thereby preventing the backhook assembly 30 from separating after assembly with the earhook assembly 20.

[0193] As an example, combining Figure 28 and Figure 25 The rear-mounted assembly 30 may further include a wire 33 and an elastic covering 34. The wire 33 is longer than the elastic wire 31 and extends from one end of the elastic wire 31 to the other. Furthermore, the elastic covering 34 may be made of a soft material (e.g., silicone) and may cover the wire 33, the elastic wire 31, and the metal connectors 32 at both ends, thereby improving the wearing comfort of the earphone 100.

[0194] In some embodiments, the elastic covering 34 may be provided with a threading channel (not labeled in the figure), through which the elastic wire 31 and the conductive wire 33 are threaded. To facilitate threading, the threading channel may be sized to allow the elastic wire 31 and the conductive wire 33 to move within the channel. For example, the cross-sectional area of ​​the threading channel may be greater than the sum of the cross-sectional areas of the elastic wire 31 and the conductive wire 33.

[0195] In other embodiments, the elastic coating 34 may be injection molded to encapsulate the conductive wire 33 and be provided with a threading channel, through which the elastic metal wire 31 is threaded. Similarly, to facilitate threading, the threading channel may be sized to allow the elastic metal wire 31 to move within the channel, for example, with the cross-sectional area of ​​the threading channel being larger than the cross-sectional area of ​​the elastic metal wire 31.

[0196] As an example, combining Figure 25 and Figure 1 The elastic covering body 34 may include an integrally connected rear covering portion 341 and a compartment covering portion 342. The rear covering portion 341 is used to cover the elastic metal wire 31 and the conductor 33, and the compartment covering portion 342 is used to at least partially cover the accommodating compartment 21 after the metal connector 32 is plugged into the accommodating compartment 21.

[0197] Furthermore, the housing covering portion 342 can at least partially cover the accommodating chamber 21 and can include a first covering portion 3421 proximal to the metal connector 32 and a second covering portion 3422 distal to the metal connector 32. The first covering portion 3421 and the second covering portion 3422 can be respectively bonded and fixed to the accommodating chamber 21, and the bonding strength between the second covering portion 3422 and the accommodating chamber 21 is greater than the bonding strength between the first covering portion 3421 and the accommodating chamber 21. By utilizing the difference in bonding strength, the relative position of the housing covering portion 342 and the accommodating chamber 21 can be adjusted during the bonding process to eliminate assembly errors between the two, thereby improving the appearance quality of the earphone 100. Based on this, the first covering portion 3421 can be fixedly connected to the accommodating chamber 21 via a first adhesive (not shown), and the second covering portion 3422 can be fixedly connected to the accommodating chamber 21 via a second adhesive (not shown), and the curing speed of the second adhesive is greater than the curing speed of the first adhesive. 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 achieve a pre-fixing effect.

[0198] Based on the above description, the container 21 can be made of plastic, and the elastic covering body 34 can be made of silicone. 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. Figure 25 A transition piece 3423 can be injection molded inside the second covering portion 3422, and the bonding strength between the transition piece 3423 and the accommodating bin 21 is greater than the bonding strength between the second covering portion 3422 and the accommodating bin 21, replacing the adhesive bonding between the second covering portion 3422 and the accommodating bin 21. The transition piece 3423 can be made of metal or plastic; if the transition piece 3423 is made of plastic, its material can be the same as that of the accommodating bin 21.

[0199] As an example, combining Figure 25 and Figure 22 As for the compartment covering portion 342, the first covering portion 3421 can be configured in a sleeve shape, and the second covering portion 3422 can be configured in a strip shape. Thus, after the metal connector 32 is plugged into the accommodating compartment 21, when the compartment covering portion 342 covers the accommodating compartment 21, the first covering portion 3421 can be sleeved around the periphery of the main compartment 211 and the cover plate 212, while the second covering portion 3422 covers the cover plate 212 and further covers the gap between the cover plate 212 and the main compartment 211, thereby enhancing the waterproof performance of the earphone 100.

[0200] Further, combined with Figure 25 and Figure 23The second covering portion 3422 can be provided with escape holes 3424 corresponding to the button holes 2123, allowing the central raised portion 2411 of each soft button 241 to be exposed through the escape hole 3424 and connected to the hard button 242. The edge connection portion 2412 of each soft button 241 is located between the main cover 212 and the second covering portion 3422, while the pressing portion 2421 is located on the side of the second covering portion 3422 facing away from the main cover 212. This improves the waterproof performance of the headset 100.

[0201] The above descriptions are only some embodiments of the present application and do not limit the scope of protection of the present application. Any equivalent device or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. An ear hook assembly, characterized in that: The ear hook assembly includes a storage compartment for accommodating a main control circuit board. A switch assembly is provided on the main control circuit board. The switch assembly includes a first fixing portion, a second fixing portion and a switch body. The first fixing portion is fitted with the main surface of the main control circuit board, the second fixing portion is bent and connected to the first fixing portion, and is fitted with the side surface of the main control circuit board. The switch body is provided on the side of the second fixing portion facing away from the main circuit board.

2. The ear hook assembly according to claim 1, wherein: The ear hook assembly further includes a button assembly for receiving a pressing force applied by a user to trigger the switch assembly, and a pressing direction of the button assembly on the switch assembly is parallel to the main surface of the main control circuit board.

3. The ear hook assembly according to claim 2, wherein: The accommodating bin includes a main bin body and a cover plate, the main bin body is used to form a accommodating space with one end open, the cover plate includes a main cover body and an annular flange connected to the main cover body, the main cover body is covered at the open end of the main bin body and is provided with a button hole, the annular flange extends into the main bin body, the button assembly is fixed on the side of the main cover body away from the annular flange, and the switch assembly is triggered through the button hole.

4. The ear hook assembly according to claim 3, characterized in that The button assembly includes a soft button and a hard button. A portion of a surface of the main cover body facing away from the annular flange is recessed toward the annular flange to form a placement area. The button hole is arranged in the placement area. The soft button is arranged in the placement area and covers the button hole. The soft button includes an integrally connected middle protrusion and an edge connection part. The edge connection part is connected to the main cover body, and the hard button is connected to the middle protrusion. The depth of the placement area is greater than the thickness of the edge connection part and less than the thickness of the middle protrusion.

5. The ear hook assembly according to claim 4, characterized in that: An annular frame portion surrounding the placement area is provided on one side of the main cover body away from the annular flange, and the annular frame portion serves as a glue retaining wall during the molding process to prevent glue overflow.

6. The ear hook assembly according to claim 4, characterized in that The number of the switch assembly, the number of the button hole and the soft button are two respectively, and they are arranged in a one-to-one correspondence. The middle raised portion of each soft button is provided with a blind hole. The hard button includes a pressing portion and a plug-in column that are integrally connected. The number of the plug-in columns is two, and each of the plug-in columns is embedded in one of the blind holes.

7. The ear hook assembly according to claim 3, characterized in that: The open end of the main bin body is provided with an outer end face, an inner side face and a transition face obliquely connecting the outer end face and the inner side face. The transition face is a plane and is connected to the outer end face and the inner side face at an obtuse angle respectively. A colloid-containing space for accommodating the colloid is formed between the transition face and the lower surface of the main cover body and the outer side face of the annular flange.

8. The ear hook assembly according to claim 7, wherein: The obtuse angle between the transition surface and the outer end surface is smaller than the obtuse angle between the transition surface and the inner side surface.

9. The ear hook assembly according to claim 8, wherein: The obtuse angle between the transition surface and the outer end surface is between 110 degrees and 135 degrees; or, the obtuse angle between the transition surface and the inner side surface is between 135 degrees and 160 degrees.

10. A headset, characterized in that: The earphone comprises a core module and the ear hook assembly according to any one of claims 1 to 9, and one end of the ear hook assembly is connected to the core module.

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