earphones

Abstract

The present application mainly relates to an earphone, comprising: a support assembly and a core module connected to the support assembly, the support assembly supporting the core module to be mounted in a mounting position, the core module comprising a core housing, an energy conversion device and a vibration panel, the energy conversion device being installed in an accommodating cavity of the core housing, the vibration panel being connected to the energy conversion device and transmitting mechanical vibrations generated by the energy conversion device to a user.

Description

[Technical Field]

[0001] This application claims priority to the Chinese patent application filed with the China National Intellectual Property Administration on October 22, 2021, with application number 2021112326083, and the title of the invention being "Earphones," and all contents of that application are incorporated into this application by reference.

[0002] This application relates to the technology of electronic equipment, and more specifically, to earphones. [Background technology]

[0003] Earphones are widely used in people's daily lives, and by using them in conjunction with electronic devices such as mobile phones and computers, users can enjoy a feast of auditory experiences. Based on their operating principle, earphones are generally divided into air conduction earphones and bone conduction earphones; based on how the user wears the earphones, they are generally divided into headphones, over-ear earphones, and in-ear earphones; and based on the interaction method between the earphones and electronic devices, they are generally divided into wired earphones and wireless earphones. [Overview of the project] [Means for solving the problem]

[0004] In some embodiments, the earphone includes a support assembly and a core module connected to the support assembly, the support assembly supporting the core module so that it is mounted in a mounting position, the core module includes a core housing, an energy converter, and a vibration panel, the energy converter being housed in a housing cavity of the core housing, and the vibration panel being connected to the energy converter and transmitting mechanical vibrations generated by the energy converter to the user.

[0005] In some embodiments, the core module includes a first vibration transmission sheet and a connecting member, the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, the core housing includes an inner cylinder wall and a first end wall and a second end wall connected to both ends of the inner cylinder wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylinder wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing and in contact with the user's skin, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0006] In some embodiments, the first vibration transmission sheet is located within the housing cavity.

[0007] In some embodiments, the first vibration transmission sheet is located on the side of the first end wall that is adjacent to the second end wall.

[0008] In some embodiments, the area of ​​the mounting hole is smaller than the area of ​​the first vibration transmission sheet when viewed from the direction of vibration.

[0009] In some embodiments, the cross-section of the inner cylinder wall, when viewed from the direction of vibration, is one of the following: circular, elliptical, or polygonal.

[0010] In some embodiments, the housing cavity communicates with the outside of the earphone only through a passage which is the gap between the connecting member and the wall surface of the mounting hole. Alternatively, the accommodation cavity communicates with the outside of the earphone only through a first passage that is a gap between the connection member and the wall surface of the mounting hole, and a second passage that communicates with the outside of the earphone through an acoustic filter. Alternatively, the accommodation cavity communicates with the outside of the earphone only through a first passage that is a gap between the connection member and the wall surface of the mounting hole, and a second passage whose ratio of the opening area to the opening area of the first passage is 10% or less.

[0011] In some embodiments, the Young's modulus of the first end wall and the second end wall is each 2000 Mpa or more.

[0012] In some embodiments, the ratio of the area of the mounting hole to the area of the first end wall as viewed from the vibration direction is 0.6 or less.

[0013] In some embodiments, the gap between the connection member and the wall surface of the mounting hole cooperates with the accommodation cavity to form a Helmholtz resonance cavity, and the peak resonance frequency of the Helmholtz resonance cavity is 4 kHz or less.

[0014] In some embodiments, the peak resonance frequency of the Helmholtz resonance cavity is 1 kHz or less.

[0015] In some embodiments, the ratio of the difference between the area of the mounting hole and the area of the connection member to the area of the mounting hole as viewed from the vibration direction is greater than 0 and 0.5 or less.

[0016] In some embodiments, the opening shape of the mounting hole and the cross-sectional shape of the connection member are corresponding polygons, or the opening shape of the mounting hole and the cross-sectional shape of the connection member are corresponding circles. The gap between the connection member and the wall surface of the mounting hole is greater than 0 and 2 mm or less.

[0017] In some embodiments, the gap between the connecting member and the wall surface of the mounting hole is 0.1 mm or more and 1 mm or less.

[0018] In some embodiments, the number of connecting members is one, and the connecting member is connected to the central region of the vibration panel. Alternatively, the number of connecting members may be multiple, and the multiple connecting members are installed at intervals around a center line parallel to the vibration direction of the vibration panel, and each is connected to the energy conversion device via a corresponding mounting hole. Alternatively, the number of connecting members may be multiple, one of which is connected to the central region of the vibration panel, the remaining connecting members are spaced apart from the connecting member located in the central region of the vibration panel, and each of the multiple connecting members is connected to the energy conversion device via a corresponding mounting hole.

[0019] In some embodiments, the Young's modulus of the vibrating panel is 3000 MPa or higher.

[0020] In some embodiments, the ratio of the absolute value of the difference between the stiffness of the vibrating panel and the stiffness of the first end wall to the larger of the two stiffnesses is 0.4 or less, and / or the ratio of the absolute value of the difference between the stiffness of the vibrating panel and the stiffness of the second end wall to the larger of the two stiffnesses is 0.4 or less.

[0021] In some embodiments, the ratio of the area of ​​the vibrating panel to the area of ​​the first end wall, as viewed from the direction of vibration, is 0.3 to 1.6.

[0022] In some embodiments, in the vibration direction, the thickness of the vibration panel is 0.3 mm to 3 mm, and / or the gap between the vibration panel and the first end wall is 0.5 mm to 3 mm, and / or the distance between the side of the first end wall away from the second end wall and the side of the second end wall away from the first end wall is 6 mm to 16 mm.

[0023] In some embodiments, the side of the vibrating panel away from the energy conversion device includes a skin contact area that contacts the user's skin and an air conduction enhancement area that at least a portion does not contact the user's skin, and the vibrating panel vibrates the air outside the earphone by the air conduction enhancement area to form sound waves.

[0024] In some embodiments, when worn, the air conduction enhancement region is directed, at least a portion of it, towards the entrance of the ear canal in the user's ear, thereby allowing the sound waves to be directed towards the entrance of the ear canal.

[0025] In some embodiments, the air conduction enhancement region is at least partially inclined with respect to the skin contact region and extends toward the energy conversion device, with the inclination angle with respect to the skin contact region being 0 to 75°. And / or, the width of the orthographic projection along the vibration direction of the air conduction enhancement region is 1 mm or more.

[0026] In some embodiments, the vibrating panel has a long axis and a short axis perpendicular to the direction of vibration and orthogonal to each other, the dimension of the vibrating panel in the long axis direction is greater than the dimension of the vibrating panel in the short axis direction, and when worn, the long axis direction is directed toward the top of the user's head and the short axis direction is directed toward the entrance of the external auditory canal of the user's ear.

[0027] In some embodiments, the vibration panel is installed in an elliptical, rounded rectangular, or racetrack shape when viewed from the direction of vibration.

[0028] In some embodiments, the core housing further includes an enclosure member connected to one end of the core housing adjacent to the vibrating panel, the enclosure member encloses the vibrating panel, and in the unmounted state, the enclosure member is spaced apart from the vibrating panel in a direction perpendicular to the vibration direction, and at least a portion of the side of the vibrating panel away from the energy conversion device protrudes from the side of the enclosure member away from the energy conversion device in the vibration direction.

[0029] In some embodiments, the enclosure member is provided with a communication hole that connects the gap between the vibration panel and the core housing to the outside of the earphone.

[0030] In some embodiments, the number of communication holes is multiple, and in the fitted state, at least one of the communication holes has an opening direction away from the top of the user's head and an angle of 0 to 10° with respect to the user's vertical axis.

[0031] In some embodiments, a gasket is provided between the vibration panel and the first end wall, and the Rockwell hardness of the gasket is less than the Rockwell hardness of the first vibration transmission sheet.

[0032] In some embodiments, the core module further includes an acoustic filter communicating with the housing cavity, wherein the cutoff frequency of the acoustic filter is 5 kHz or less.

[0033] In some embodiments, the first end wall includes a first sub-end wall and a second sub-end wall spaced apart in the vibration direction, the mounting hole penetrates the first sub-end wall and the second sub-end wall along the vibration direction, and the first sub-end wall and the second sub-end wall cooperate with the inner cylinder wall to form the acoustic filter.

[0034] In some embodiments, the gap between the first sub-end wall and the second sub-end wall of the energy conversion device in the vibration direction is 0.5 mm to 5 mm.

[0035] In some embodiments, the energy conversion device includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, wherein the bracket is connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connects the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil is connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction, and the vibration panel is connected to the bracket.

[0036] In some embodiments, the magnetic circuit system and / or the core housing is provided with a Helmholtz resonant cavity that communicates with the housing cavity.

[0037] In some embodiments, the frequency response curve of the air-conducted sound output to the outside of the earphone through the mounting hole has a resonance peak, and the Helmholtz resonance cavity is configured to reduce the intensity of the resonance peak, with the peak resonance frequency of the resonance peak being 500Hz to 4kHz.

[0038] In some embodiments, the Helmholtz resonant cavity is configured to reduce the vibration intensity within a predetermined frequency band of the frequency response curve of the air-conducted sound output to the outside of the earphone through the mounting hole, and the difference between the peak value of the vibration intensity when the opening connecting the Helmholtz resonant cavity and the housing cavity is open and the peak value of the vibration intensity when the opening connecting the Helmholtz resonant cavity and the housing cavity is closed is 3 dB or more.

[0039] In some embodiments, the bracket is provided with a communication hole extending along the direction of vibration, and / or, the magnetic circuit system includes a permeable cover and a magnet connected to the bottom of the permeable cover, the magnet being connected to the central region of the second vibration transmission sheet and spaced apart from the permeable cover in a direction perpendicular to the vibration direction to form the magnetic gap, the coil being inserted between the magnet and the permeable cover, and the permeable cover being provided with a communication hole connecting the magnetic gap to the external space of the magnetic circuit system.

[0040] In some embodiments, the volume of the core housing is 3 cm³. 3 The following applies:

[0041] In some embodiments, the support assembly is installed as a head beam assembly, which bypasses the user's head and brings the core module into contact with the user's cheek via the vibration panel.

[0042] In some embodiments, the core module includes a connecting member, the energy conversion device is installed in a housing cavity of the core housing, the core housing is provided with a mounting hole, the vibrating panel is located outside the core housing and in contact with the user's skin, the connecting member has one end connected to the vibrating panel and the other end inserted into the core housing through the mounting hole and connected to the energy conversion device, and, viewed from the direction of vibration, the area of ​​the vibrating panel is larger than the area of ​​the mounting hole, and the area of ​​the mounting hole is larger than the area of ​​the connecting member. The aforementioned housing cavity communicates with the outside of the earphone only through a passage which is the gap between the connecting member and the wall surface of the mounting hole. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, which communicates with the outside of the earphone via an acoustic filter.

[0043] In some embodiments, the energy conversion device includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, wherein the bracket is connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connects the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil is connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction, and the vibration panel is connected to the bracket, wherein the area of ​​the mounting hole is smaller than the area of ​​the first vibration transmission sheet when viewed from the vibration direction.

[0044] In some embodiments, when viewed from the direction of vibration, the ratio of the difference between the area of ​​the mounting hole and the area of ​​the connecting member to the area of ​​the mounting hole is greater than 0 and less than or equal to 0.5.

[0045] In some embodiments, the core module includes a first vibration transmission sheet and a connecting member, the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, the core housing is provided with mounting holes, the core housing is formed surrounding a housing cavity that communicates with the outside only through the mounting holes, the vibration panel is located outside the core housing and in contact with the user's skin, the connecting member has one end connected to the vibration panel and the other end inserted into the core housing through the mounting holes and connected to the energy converter, and the gap between the connecting member and the wall of the mounting hole is greater than 0 and 2 mm or less.

[0046] In some embodiments, the gap between the connecting member and the wall surface of the mounting hole is 0.1 mm or more and 1 mm or less.

[0047] In some embodiments, the energy conversion device includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, wherein the bracket is connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connects the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil is connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction, and the vibration panel is connected to the bracket, wherein the area of ​​the mounting hole is smaller than the area of ​​the first vibration transmission sheet when viewed from the vibration direction.

[0048] In some embodiments, the core module includes a first vibration transmission sheet, the energy conversion device is suspended within the housing cavity of the core housing via the first vibration transmission sheet, the mass of the core housing is 1 g or more, and the rigidity of the first vibration transmission sheet is 7000 N / m or less.

[0049] In some embodiments, the mass of the core housing is 1.2 g or more, and the rigidity of the first vibration transmission sheet is 5000 N / m or less.

[0050] In some embodiments, the ratio of the mass of the core housing to the stiffness of the first vibration transmission sheet is 0.15s 2 That's all.

[0051] In some embodiments, the ratio of the mass of the core housing to the stiffness of the first vibration transmission sheet is 0.2s 2 That's all.

[0052] In some embodiments, the energy conversion device includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, wherein the bracket is connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connects the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil is connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy conversion device, and the vibration panel is connected to the bracket.

[0053] In some embodiments, the rigidity of the second vibration transmission sheet is 1000 N / m or more.

[0054] In some embodiments, when not installed, the frequency response curve of the vibration of the vibration panel has a resonant dip generated by the first vibration transmission sheet, and the peak resonant frequency of the resonant dip is 400 Hz or less.

[0055] In some embodiments, the frequency response curve has at least one resonance peak jointly generated by the first vibration transmission sheet and the second vibration transmission sheet within a frequency band range of 200 Hz to 2 kHz.

[0056] In some embodiments, the at least one resonance peak includes a first resonance peak and a second resonance peak, wherein the peak resonance frequency of the first resonance peak is 200 Hz to 400 Hz, and the peak resonance frequency of the second resonance peak is greater than the peak resonance frequency of the first resonance peak.

[0057] In some embodiments, when the stiffness of the first vibration transmission sheet changes, the absolute value of the offset amount of the peak resonance frequency of the second resonance peak is greater than the absolute value of the offset amount of the peak resonance frequency of the first resonance peak, and when the stiffness of the second vibration transmission sheet changes, the absolute value of the offset amount of the peak resonance frequency of the first resonance peak is greater than the absolute value of the offset amount of the peak resonance frequency of the second resonance peak.

[0058] In some embodiments, the core module further includes a connecting member, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0059] In some embodiments, the core module includes a first vibration transmission sheet, the energy converter is suspended within the housing cavity of the core housing via the first vibration transmission sheet, and the ratio of the mass of the core housing to the stiffness of the first vibration transmission sheet is 0.15s 2 That's all.

[0060] In some embodiments, the core module includes a first vibration transmission sheet, the energy conversion device is suspended within the housing cavity of the core housing via the first vibration transmission sheet, the mass of the core housing is 0.5 g or less, and the rigidity of the first vibration transmission sheet is 80,000 N / m or more.

[0061] In some embodiments, the energy conversion device includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, wherein the bracket is connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connects the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil is connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy conversion device, and the vibration panel is connected to the bracket.

[0062] In some embodiments, the second vibration transmission sheet has its peripheral region connected to the bracket and its central region connected to the magnetic circuit system.

[0063] In some embodiments, when not installed, the frequency response curve of the vibration of the vibration panel has a resonant dip generated by the first vibration transmission sheet, and the peak resonant frequency of the resonant dip is 2 kHz or higher.

[0064] In some embodiments, the frequency response curve has a first resonance peak and a second resonance peak jointly generated by the first vibration transmission sheet and the second vibration transmission sheet, wherein the peak resonance frequency of the first resonance peak is smaller than the peak resonance frequency of the resonance dip, and the peak resonance frequency of the second resonance peak is larger than the peak resonance frequency of the resonance dip.

[0065] In some embodiments, the peak resonance frequency of the first resonance peak is 200 Hz to 400 Hz.

[0066] In some embodiments, the core module further includes a connecting member, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0067] In some embodiments, the housing cavity communicates with the outside of the earphone only through a passage which is the gap between the connecting member and the wall surface of the mounting hole. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, which communicates with the outside of the earphone via an acoustic filter. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, the ratio of the opening area to the opening area of ​​the first passage being 10% or less.

[0068] In some embodiments, the housing cavity communicates with the outside of the earphone through a passage which is a gap between the connecting member and the wall surface of the mounting hole, and the core module further includes a sealing membrane that seals the passage.

[0069] In some embodiments, the sealing membrane includes a first connection portion, a wrinkled portion, and a second connection portion which are integrally connected, the wrinkled portion forming a recessed region between the first connection portion and the second connection portion, the first connection portion being connected to the first end wall, and the second connection portion being connected to the connecting member or the vibration panel.

[0070] In some embodiments, the core module includes a first vibration transmission sheet, the energy converter is suspended within the housing cavity of the core housing via the first vibration transmission sheet, the core module is configured such that, in the unmounted state, the frequency response curve of the vibration of the vibration panel has no effective resonant dip within the frequency band range of 400 Hz to 2 kHz, the frequency response curve represents the relationship between the vibration intensity of the vibration panel and the frequency, the effective resonant dip is defined as having two intersection points between a reference line segment parallel to the horizontal axis of the frequency response curve and the frequency response curve, the intensity obtained by subtracting the peak resonant intensity of the effective resonant dip from the intensity corresponding to the reference line segment is 6 dB, and the difference in frequencies corresponding to the two endpoints of the reference line segment is 4 octaves or less.

[0071] In some embodiments, the mass of the core housing and / or the stiffness of the first vibration transmission sheet are configured such that the frequency response curve does not have the effective resonance dip within the frequency band range of 400 Hz to 2 kHz.

[0072] In some embodiments, the energy conversion device includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, wherein the bracket is connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connects the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil is connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy conversion device, and the vibration panel is connected to the bracket.

[0073] In some embodiments, the mass of the core housing and / or the stiffness of the first vibration transmission sheet are configured such that the frequency response curve has the effective resonance dip within the frequency band range of 200 Hz to 400 Hz.

[0074] In some embodiments, the mass of the core housing is 1 g or more, and the rigidity of the first vibration transmission sheet is 7000 N / m or less.

[0075] In some embodiments, the frequency response curve has two resonance peaks jointly generated by the first vibration transmission sheet and the second vibration transmission sheet within a frequency band range of 400 Hz to 2 kHz.

[0076] In some embodiments, the rigidity of the second vibration transmission sheet is 1000 N / m or more.

[0077] In some embodiments, the mass of the core housing and / or the stiffness of the first vibration transmission sheet are configured such that the frequency response curve has the effective resonance dip within a frequency band range of 2 kHz to 20 kHz.

[0078] In some embodiments, the mass of the core housing is 0.5 g or less, and the rigidity of the first vibration transmission sheet is 80,000 N / m or more.

[0079] In some embodiments, the mass of the core housing and / or the stiffness of the first vibration transmission sheet are configured such that the frequency response curve does not have the effective resonance dip within the frequency band range of 200 Hz to 2 kHz.

[0080] In some embodiments, the mass of the core housing is 1 g or more, and the rigidity of the first vibration transmission sheet is 2500 N / m or less. Alternatively, the mass of the core housing is 0.5 g or less, and the rigidity of the first vibration transmission sheet is 80,000 N / m or more.

[0081] In some embodiments, the mass of the core housing and / or the stiffness of the first vibration transmission sheet are configured such that the frequency response curve does not have the effective resonance dip within the frequency band range of 200 Hz to 4 kHz.

[0082] In some embodiments, the mass of the core housing is 1 g or more, and the rigidity of the first vibration transmission sheet is 2500 N / m or less.

[0083] Alternatively, the mass of the core housing is 0.5 g or less, and the rigidity of the first vibration transmission sheet is 160,000 N / m or more.

[0084] In some embodiments, the frequency response curve has at least one resonance peak jointly generated by the first vibration transmission sheet and the second vibration transmission sheet within a frequency band range of 200 Hz to 2 kHz.

[0085] In some embodiments, the mass of the core housing is 1 g or more, the rigidity of the first vibration transmission sheet is 2500 N / m or less, and the rigidity of the second vibration transmission sheet is 100000 N / m or less. Alternatively, the mass of the core housing is 0.5 g or less, the rigidity of the first vibration transmission sheet is 80,000 N / m or more, and the rigidity of the second vibration transmission sheet is 1,000 N / m to 500,000 N / m.

[0086] In some embodiments, the core module further includes a connecting member, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0087] In some embodiments, the non-attached state is defined as a state in which the earphone is not attached to the user's head, the support assembly is fixed, and the core module is cantilevered relative to the support assembly.

[0088] In some embodiments, the core module includes a first vibration transmission sheet, the energy converter is suspended within the housing cavity of the core housing via the first vibration transmission sheet, and includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, the bracket being connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connecting the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil being connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy converter, and the vibration panel being connected to the bracket and, in the unmounted state, The frequency response curve of the vibration of the vibration panel has a first resonance peak and a second resonance peak jointly generated by the first vibration transmission sheet and the second vibration transmission sheet, the peak resonance frequency of the first resonance peak is smaller than the peak resonance frequency of the second resonance peak, there is no effective resonance dip between the first resonance peak and the second resonance peak, the frequency response curve represents the relationship between the vibration intensity and frequency of the vibration panel, the effective resonance dip is defined as having two intersection points between a reference line segment parallel to the horizontal axis of the frequency response curve and the frequency response curve, the intensity obtained by subtracting the peak resonance intensity of the effective resonance dip from the intensity corresponding to the reference line segment is 6 dB, and the difference in frequencies corresponding to the two ends of the reference line segment is 4 octaves or less.

[0089] In some embodiments, the mass of the core housing is 1 g or more, the rigidity of the first vibration transmission sheet is 7000 N / m or less, and the rigidity of the second vibration transmission sheet is 1000 N / m or more.

[0090] In some embodiments, the mass of the core housing is 1.2 g or more, the rigidity of the first vibration transmission sheet is 5000 N / m or less, and the rigidity of the second vibration transmission sheet is 3000 N / m or more.

[0091] In some embodiments, the stiffness of the second vibration transmission sheet is greater than the stiffness of the first vibration transmission sheet.

[0092] In some embodiments, when the stiffness of the first vibration transmission sheet changes, the absolute value of the offset amount of the peak resonance frequency of the second resonance peak is greater than the absolute value of the offset amount of the peak resonance frequency of the first resonance peak, and when the stiffness of the second vibration transmission sheet changes, the absolute value of the offset amount of the peak resonance frequency of the first resonance peak is greater than the absolute value of the offset amount of the peak resonance frequency of the second resonance peak.

[0093] In some embodiments, the peak resonance frequency of the first resonance peak is 80 Hz to 400 Hz, and the peak resonance frequency of the second resonance peak is 100 Hz to 2 kHz.

[0094] In some embodiments, the second vibration transmission sheet has its peripheral region connected to the bracket and its central region connected to the magnetic circuit system.

[0095] In some embodiments, the core module further includes a connecting member, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0096] In some embodiments, the housing cavity communicates with the outside of the earphone only through a passage which is a gap between the connecting member and the wall surface of the mounting hole, and the core module further includes a sealing membrane that seals the passage.

[0097] In some embodiments, the sealing membrane includes a first connection portion, a wrinkled portion, and a second connection portion which are integrally connected, the wrinkled portion forming a recessed region between the first connection portion and the second connection portion, the first connection portion being connected to the first end wall, and the second connection portion being connected to the connecting member or the vibration panel.

[0098] In some embodiments, the core module includes a first vibration transmission sheet, the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, and includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, the bracket being connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connecting the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil being connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy converter, and the vibration panel being connected to the bracket, and in an unmounted state, the vibration frequency response curve of the vibration panel has a resonant dip generated by the first vibration transmission sheet and a first and second resonant peak jointly generated by the first and second vibration transmission sheets, the peak resonant frequency of the resonant dip being smaller than the peak resonant frequency of the first resonant peak, and the peak resonant frequency of the first resonant peak being smaller than the peak resonant frequency of the second resonant peak.

[0099] In some embodiments, the peak resonant frequency of the resonant dip is 400 Hz or higher.

[0100] In some embodiments, the mass of the core housing is 1 g or less, the rigidity of the first vibration transmission sheet is 7000 N / m or more, and the rigidity of the second vibration transmission sheet is 1000 N / m or more.

[0101] In some embodiments, the peak resonance frequency of the second resonance peak is 1 kHz or less.

[0102] In some embodiments, the mass of the core housing is 1 g or less, the rigidity of the first vibration transmission sheet is 7000 N / m or more, and the rigidity of the second vibration transmission sheet is 20000 N / m to 50000 N / m.

[0103] In some embodiments, the second vibration transmission sheet has its peripheral region connected to the bracket and its central region connected to the magnetic circuit system.

[0104] In some embodiments, the core module further includes a connecting member, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0105] In some embodiments, the housing cavity communicates with the outside of the earphone only through a passage which is the gap between the connecting member and the wall surface of the mounting hole. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, which communicates with the outside of the earphone via an acoustic filter. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, the ratio of the opening area to the opening area of ​​the first passage being 10% or less.

[0106] In some embodiments, the housing cavity communicates with the outside of the earphone through a passage which is a gap between the connecting member and the wall surface of the mounting hole, and the core module further includes a sealing membrane that seals the passage.

[0107] In some embodiments, the sealing membrane includes a first connection portion, a wrinkled portion, and a second connection portion which are integrally connected, the wrinkled portion forming a recessed region between the first connection portion and the second connection portion, the first connection portion being connected to the first end wall, and the second connection portion being connected to the connecting member or the vibration panel.

[0108] In some embodiments, the core module includes a first vibration transmission sheet, the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, and includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, the bracket being connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet connecting the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, the coil being connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy converter, the vibration panel being connected to the bracket, and in the unmounted state, the frequency response curve of the vibration of the vibration panel has a resonance peak strongly correlated with the stiffness of the bracket, the stiffness of the bracket being 100,000 N / m or more, and the peak resonance frequency of the resonance peak being 4 kHz or more.

[0109] In some embodiments, the material of the bracket is one of polycarbonate, nylon, or plastic titanium. Alternatively, the bracket includes a base and a reinforcing body, wherein the material of the base is one of polycarbonate, nylon, or plastic titanium, the reinforcing body is glass fiber or carbon fiber doped into the base, or the reinforcing body is an aluminum alloy or stainless steel formed into the base by a secondary injection molding process.

[0110] In some embodiments, the ratio of the average thickness of the bracket to the area of ​​the bracket is 0.01 mm -1 The above is defined as follows: the area of ​​the bracket is defined as the area of ​​the orthographic projection of the bracket along the vibration direction, and the average thickness of the bracket is defined as the volume of the bracket divided by the area of ​​the bracket.

[0111] In some embodiments, the mass of the core housing and / or the stiffness of the first vibration transmission sheet are configured such that the frequency response curve does not have an effective resonance dip within the frequency band range of 400 Hz to 2 kHz, the effective resonance dip being defined as the frequency response curve having two intersection points with a reference line segment parallel to the horizontal axis of the frequency response curve, the intensity obtained by subtracting the peak resonance intensity of the effective resonance dip from the intensity corresponding to the reference line segment being 6 dB, and the difference in frequencies corresponding to the two endpoints of the reference line segment being 4 octaves or less.

[0112] In some embodiments, the mass of the core housing and / or the stiffness of the first vibration transmission sheet are configured such that the frequency response curve has the effective resonance dip within the frequency band range of 200 Hz to 400 Hz.

[0113] In some embodiments, the mass of the core housing is 1 g or more, and the rigidity of the first vibration transmission sheet is 7000 N / m or less.

[0114] In some embodiments, the frequency response curve has two resonance peaks jointly generated by the first vibration transmission sheet and the second vibration transmission sheet within a frequency band range of 400 Hz to 2 kHz.

[0115] In some embodiments, the rigidity of the second vibration transmission sheet is 1000 N / m or more.

[0116] In some embodiments, the core module further includes a connecting member, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0117] In some embodiments, the housing cavity communicates with the outside of the earphone only through a passage which is the gap between the connecting member and the wall surface of the mounting hole. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, which communicates with the outside of the earphone via an acoustic filter. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, the ratio of the opening area to the opening area of ​​the first passage being 10% or less.

[0118] In some embodiments, the support assembly is installed as a head beam assembly, which bypasses the user's head and brings the core module into contact with the user's cheek, the core module transmits mechanical vibrations generated by the energy converter via bone conduction, the head beam assembly applies a pressing force of 0.4N to 0.8N to press the core module against the user's cheek, and the contact area between the core module and the user's cheek is 400 mm². 2 ~600mm 2 That is the case.

[0119] In some embodiments, the core module further includes a first vibration transmission sheet, the core housing is connected to the head beam assembly, the energy conversion device is suspended in the accommodation cavity of the core housing via the first vibration transmission sheet, the vibration panel is connected to the energy conversion device and contacts the user's skin, the pressing force of the vibration panel against the user's cheek is smaller than the pressing force by which the head beam assembly presses the core module against the user's cheek, and the contact area between the vibration panel and the user's cheek is smaller than the contact area between the core module and the user's cheek.

[0120] In some embodiments, the pressing force of the vibration panel against the user's cheek is 0.1 N to 0.7 N, and the contact area with the user's cheek is 180 mm 2 ~300 mm 2 is.

[0121] In some embodiments, the core module further includes an enclosure member connected to one end of the core housing close to the vibration panel, the enclosure member surrounds the vibration panel and contacts the user's cheek, and in the non-worn state, the enclosure member is installed at a distance from the vibration panel in a direction perpendicular to the vibration direction of the energy conversion device, and at least a part of the side of the vibration panel away from the energy conversion device protrudes from the side of the enclosure member away from the energy conversion device in the vibration direction.

[0122] In some embodiments, the side of the vibrating panel away from the energy conversion device includes a skin contact area that contacts the user's skin and an edge area connected to the skin contact area, the edge area being located on the outer periphery of the skin contact area and spaced apart from the skin contact area in the vibration direction, the enclosing member including a connection portion connected to the core housing and a position limiting portion connected to the connection portion, the position limiting portion being located on the side of the vibrating panel away from the energy conversion device, the position limiting portion overlapping with the edge area and offset from the skin contact area when viewed from the vibration direction, and in the unworn state, the skin contact area protruding from the side of the position limiting portion away from the energy conversion device in the vibration direction.

[0123] In some embodiments, the side of the vibrating panel away from the energy conversion device further includes an air conduction enhancement region connected between the skin contact region and the edge region, wherein at least a portion of the air conduction enhancement region does not contact the user's skin, and the vibrating panel vibrates the air outside the earphone by the air conduction enhancement region to form sound waves.

[0124] In some embodiments, when worn, the air conduction enhancement region is directed, at least a portion of it, towards the entrance of the ear canal in the user's ear, thereby allowing the sound waves to be directed towards the entrance of the ear canal.

[0125] In some embodiments, the air conduction enhancement region is at least partially inclined with respect to the skin contact region, and the inclination angle with respect to the skin contact region is 0 to 75°. And / or, the width of the orthographic projection along the vibration direction of the air conduction enhancement region is 1 mm or more.

[0126] In some embodiments, the vibrating panel has a long axis and a short axis perpendicular to the direction of vibration and orthogonal to each other, the dimension of the vibrating panel in the long axis direction is greater than the dimension of the vibrating panel in the short axis direction, and when worn, the long axis direction is directed toward the top of the user's head and the short axis direction is directed toward the entrance of the external auditory canal of the user's ear.

[0127] In some embodiments, the enclosure member is provided with communication holes that connect the gap between the vibration panel and the core housing to the outside of the earphone, the number of communication holes being multiple, and the opening direction of at least one of the communication holes is away from the top of the user's head, with an angle of 0 to 10° with respect to the user's vertical axis.

[0128] In some embodiments, the support assembly is installed as a head beam assembly, the head beam assembly including an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's head, the ends of the adapter member connected to the arc-shaped head beam member and the core module, respectively, and allowing the core module to move closer to or away from the arc-shaped head beam member in the extension direction of the head beam assembly, the core module transmitting mechanical vibrations generated in the energy converter by bone conduction, and the head beam assembly presses the core module against the user's cheek by applying a pressing force of 0.4N to 0.8N.

[0129] In some embodiments, the adapter member and the core module are installed at both ends of the arc-shaped head beam member, and the head beam assembly provides a first pressing force to the core module in a first operating state, and provides a second pressing force to the core module in a second operating state, and the absolute value of the difference between the second pressing force and the first pressing force is 0 to 0.1 N. The first operating state is defined as an operating state in which each adapter member has a first extension amount relative to the arc-shaped head beam member and there is a first spacing between the two core modules, and the second operating state is defined as an operating state in which each adapter member has a second extension amount relative to the arc-shaped head beam member and there is a second spacing between the two core modules, wherein the second extension amount is greater than the first extension amount and the second spacing is greater than the first spacing.

[0130] In some embodiments, the first extension amount takes a minimum value when the core module is closest to the arc-shaped head beam member, and the second extension amount takes a maximum value when the core module is furthest from the arc-shaped head beam member.

[0131] In some embodiments, when each of the core modules is either closest to or furthest from the arc-shaped head beam member, the adapter members at both ends of the arc-shaped head beam member are positioned symmetrically with respect to a first reference plane, the second reference plane passes through a line connecting the ends of the arc-shaped head beam member and intersects the first reference plane perpendicularly, the arc-shaped head beam member is in its natural state, the arc-shaped head beam member and the adapter members are projected onto the second reference plane, and the core module is positioned relative to the arc-shaped head beam member When closest to the core module, the free end of the adapter member connected to the core module has a first position; when the core module is furthest from the arc-shaped head beam member, the free end has a second position; the line connecting the first position and the second position has a first projection component in a first reference direction parallel to the line connecting the ends of the arc-shaped head beam member, and a second projection component in a second reference direction perpendicular to the line connecting the ends of the arc-shaped head beam member; and the ratio of the second projection component to the first projection component is 2 or more. And / or, the ratio of the cross-sectional bending stiffness of the adapter member to the cross-sectional bending stiffness of the arc-shaped head beam member is 0.9 or less.

[0132] In some embodiments, the earphone further includes an adapter housing rotatably connected to one end of the adapter member away from the arc-shaped head beam member, the core module further includes a core housing rotatably connected to the adapter housing, the energy conversion device is installed in a housing cavity of the core housing, and the axis of rotation of the core housing relative to the adapter housing intersects the axis of rotation of the adapter housing relative to the adapter member.

[0133] In some embodiments, the adapter housing is provided with a rotating shaft cavity, the adapter member is inserted into the rotating shaft cavity along the axial direction of the rotating shaft cavity, and the earphone further includes a locking member that restricts the position of the adapter member along the axial direction of the rotating shaft cavity so that the adapter member is held within the rotating shaft cavity, a position limiting groove is formed on the outer circumferential wall of the adapter member, and a position limiting block fitted into the position limiting groove is provided on the inner circumferential wall of the rotating shaft cavity so as to limit the rotation angle of the adapter member with respect to the rotating shaft cavity.

[0134] In some embodiments, a locking groove is provided at the free end of the adapter member, and after the adapter member is inserted into the rotating shaft cavity from one end of the rotating shaft cavity, the locking groove is exposed from the other end of the rotating shaft cavity, and the locking member is locked in the locking groove, with a radial dimension greater than the radial dimension of the rotating shaft cavity.

[0135] In some embodiments, the rotation angle is between 5° and 15°.

[0136] In some embodiments, the earphone further includes a battery and a motherboard coupled to the energy conversion device, the adapter housing includes a plate rotatably connected to the adapter member and a case connected to the plate, the battery or the motherboard being placed between the case and the plate, and the core housing rotatably connected to the adapter housing and located on the side of the plate away from the case.

[0137] In some embodiments, the core module further includes a first vibration transmission sheet and a vibration panel, the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, the vibration panel is connected to the energy converter and in contact with the user's skin, the pressing force of the vibration panel against the user's cheek is less than the pressing force of the head beam assembly against the core module against the user's cheek, and the contact area between the vibration panel and the user's cheek is less than the contact area between the core module and the user's cheek.

[0138] In some embodiments, the support assembly is configured as a head beam assembly, and the earphone includes an adapter housing rotatably connected to the head beam assembly, a core module connected to the adapter housing, and a battery and motherboard coupled to the core module, wherein the head beam assembly bypasses the top of the user's head and the core module contacts the user's cheek, the adapter housing includes a middle plate rotatably connected to the head beam assembly and a case connected to the middle plate, the battery or the motherboard is installed between the case and the middle plate, and the core module includes a core housing rotatably connected to the adapter housing and an energy converter installed in the housing cavity of the core housing, wherein the core housing and the case are located on opposite sides of the middle plate, respectively.

[0139] In some embodiments, the core housing rotates about a first axis relative to the adapter housing, and the adapter housing rotates about a second axis relative to the head beam assembly, and the first and second axes intersect in a reference plane perpendicular to the vibration direction of the energy converter.

[0140] In some embodiments, the core module further includes a first vibration transmission sheet and a vibration panel, the energy conversion device is suspended within a housing cavity of the core housing via the first vibration transmission sheet, and the vibration panel is connected to the energy conversion device and comes into contact with the user's skin.

[0141] In some embodiments, the core module further includes a connecting member, the core housing includes an inner cylindrical wall connected to the adapter housing, and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed in the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0142] In some embodiments, the ratio of the area of ​​the mounting hole to the area of ​​the first end wall, viewed from the direction of vibration, is 0.6 or less.

[0143] In some embodiments, when viewed from the direction of vibration, the ratio of the difference between the area of ​​the mounting hole and the area of ​​the connecting member to the area of ​​the mounting hole is greater than 0 and less than or equal to 0.5.

[0144] In some embodiments, the side of the vibrating panel away from the energy converter includes a skin contact area that contacts the user's skin and an edge area connected to the skin contact area, the edge area being located on the outer periphery of the skin contact area and spaced apart from the skin contact area in the vibration direction of the energy converter; the core module further includes a casing member connected to one end of the inner cylinder wall away from the second end wall, the casing member including a connecting portion connected to the inner cylinder wall and a position limiting portion connected to the connecting portion, the position limiting portion being located on the side of the vibrating panel away from the energy converter, the position limiting portion overlapping with the edge area and offset from the skin contact area when viewed from the vibration direction, and in the unworn state, the skin contact area protruding from the side of the position limiting portion away from the energy converter in the vibration direction.

[0145] In some embodiments, the side of the vibrating panel away from the energy conversion device further includes an air conduction enhancement region connected between the skin contact region and the edge region, wherein at least a portion of the air conduction enhancement region does not contact the user's skin, and the vibrating panel vibrates the air outside the earphone by the air conduction enhancement region to form sound waves.

[0146] In some embodiments, the air conduction enhancement region is at least partially inclined with respect to the skin contact region, and the inclination angle with respect to the skin contact region is 0 to 75°. And / or, the width of the orthographic projection along the vibration direction of the air conduction enhancement region is 1 mm or more.

[0147] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's head, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion connected in order, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being rotatably connected to the intermediate plate, the first and second connecting portions being bent and extended in opposite directions relative to the intermediate transition portion, so that, when worn, the arc-shaped head beam member is positioned above the user's ears and the core module is positioned in front of the user's ears, viewed from the direction in which the coronal axis of the human body is located.

[0148] In some embodiments, the bending angle of the first connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°, and / or the bending angle of the second connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°.

[0149] In some embodiments, when worn, the first connecting portion is parallel to the second connecting portion when viewed from the direction in which the coronal axis of the human body is located, and the distance between the first connecting portion and the second connecting portion is 20 mm to 30 mm.

[0150] In some embodiments, the earphone includes an adapter housing, the core module includes a core housing rotatably connected to the adapter housing, an energy converter installed in a housing cavity of the core housing, and a surrounding member connected to one end of the core housing away from the adapter housing, the surrounding member including a connecting portion connected to the core housing and a flange portion connected to the connecting portion, the flange portion located on the outer circumference of the core housing and overlapping the adapter housing when viewed from the vibration direction of the energy converter, and in the unmounted state, the gap between the flange portion and the adapter housing in the vibration direction, starting from the axis by which the core housing rotates relative to the adapter housing, gradually increases along a reference direction defined as perpendicular to the vibration direction and the direction in which the axis is located, and away from the axis.

[0151] In some embodiments, the maximum gap between the flange portion and the adapter housing in the vibration direction is 2 mm to 5 mm.

[0152] In some embodiments, when viewed from the direction in which the axis is located, the flange portion is installed in an arc shape on the side facing the adapter housing.

[0153] In some embodiments, the arc radius of the flange portion on the side facing the adapter housing is 50 mm or more.

[0154] In some embodiments, the core module further includes a first vibration transmission sheet and a vibration panel, the energy conversion device is suspended within a housing cavity of the core housing via the first vibration transmission sheet, the vibration panel is connected to the energy conversion device and in contact with the user's skin, the enclosure member surrounds the vibration panel, and in the unmounted state, the enclosure member is spaced apart from the vibration panel in a direction perpendicular to the vibration direction, and at least a portion of the side of the vibration panel away from the energy conversion device protrudes from the side of the enclosure member away from the energy conversion device in the vibration direction.

[0155] In some embodiments, the side of the vibrating panel away from the energy conversion device includes a skin contact area that contacts the user's skin and an edge area connected to the skin contact area, the edge area being located on the outer periphery of the skin contact area and spaced apart from the skin contact area in the vibration direction, the enclosure member further includes a position limiting portion connected to the connection portion, the position limiting portion being located on the side of the vibrating panel away from the energy conversion device, the position limiting portion overlapping with the edge area and offset from the skin contact area when viewed from the vibration direction, and in the unattached state, the skin contact area protrudes from the side of the position limiting portion away from the energy conversion device in the vibration direction.

[0156] In some embodiments, the side of the vibrating panel away from the energy conversion device further includes an air conduction enhancement region connected between the skin contact region and the edge region, wherein at least a portion of the air conduction enhancement region does not contact the user's skin, and the vibrating panel vibrates the air outside the earphone by the air conduction enhancement region to form sound waves.

[0157] In some embodiments, the air conduction enhancement region is at least partially inclined with respect to the skin contact region, and the inclination angle with respect to the skin contact region is 0 to 75°. And / or, the width of the orthographic projection along the vibration direction of the air conduction enhancement region is 1 mm or more.

[0158] In some embodiments, the earphone further includes a head beam assembly connected to the adapter housing, the head beam assembly bypassing the user's head and bringing the core module into contact with the user's cheek, the head beam assembly including an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's head, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion connected in order, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the adapter housing, the first and second connecting portions being bent and extended in opposite directions relative to the intermediate transition portion, so that when worn, the arc-shaped head beam member is positioned above the user's ears and the core module is positioned in front of the user's ears, viewed from the direction in which the coronal axis of the human body is located.

[0159] In some embodiments, the bending angle of the first connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°, and / or the bending angle of the second connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°.

[0160] In some embodiments, when worn, the first connecting portion is parallel to the second connecting portion when viewed from the direction in which the coronal axis of the human body is located, and the distance between the first connecting portion and the second connecting portion is 20 mm to 30 mm.

[0161] In some embodiments, the earphone includes an adapter housing, the adapter housing includes a cylindrical side wall, the cylindrical side wall is located on the outer circumference of the core module, the core module includes a core housing and an energy converter installed in a housing cavity of the core housing, the core housing includes a first core housing, the first core housing includes an inner cylindrical wall and an outer cylindrical wall, the inner cylindrical wall is located on the outer circumference of the energy converter, the outer cylindrical wall is located on the outer circumference of the inner cylindrical wall and is spaced apart from the inner cylindrical wall in a direction perpendicular to the vibration direction of the energy converter, an axial hole is provided in one of the outer cylindrical wall and the cylindrical side wall, and a rotating shaft is provided in the other which engages with the axial hole, the rotating shaft is fitted into the axial hole to allow the core housing to rotate relative to the adapter housing.

[0162] In some embodiments, the first core housing further includes a reinforcing column connected between the outer cylindrical wall and the inner cylindrical wall, wherein the rotating shaft is provided on the side of the cylindrical side wall facing the outer cylindrical wall, and the shaft hole is provided in the reinforcing column.

[0163] In some embodiments, the first core housing further includes a transition wall and a cover plate connected between the inner and outer cylindrical walls, the cover plate and the transition wall being spaced apart in the vibration direction, and together with the outer cylindrical wall, the inner cylindrical wall and the transition wall, forming a Helmholtz resonant cavity, the Helmholtz resonant cavity communicating with the housing cavity, so that the air in the housing cavity absorbs the acoustic energy of sound waves generated by the vibration of the energy converter.

[0164] In some embodiments, the frequency response curve of the sound wave has a resonance peak, the peak resonance frequency of the resonance peak is 500 Hz to 4 kHz, and the difference between the peak resonance intensity of the resonance peak when the opening connecting the Helmholtz resonance cavity and the housing cavity is open and the peak resonance intensity of the resonance peak when the opening connecting the Helmholtz resonance cavity and the housing cavity is closed is 3 dB or more.

[0165] In some embodiments, the first core housing further includes an end wall and a transition wall, the end wall being connected to one end of the inner cylindrical wall and forming around the housing cavity, the transition wall being connected between the inner cylindrical wall and the outer cylindrical wall, the adapter housing further includes a middle plate connected to the cylindrical side wall, the middle plate being located on the side of the end wall away from the housing cavity, the end wall, the inner cylindrical wall, the transition wall and the outer cylindrical wall together with the middle plate and the cylindrical side wall form an acoustic filter, the acoustic filter communicating with the housing cavity to absorb the acoustic energy of sound waves generated by the vibration of the energy converter in the air within the housing cavity, the sound waves being transmitted to the outside of the earphone through the gap between the cylindrical side wall and the outer cylindrical wall after being absorbed by the acoustic filter.

[0166] In some embodiments, the cutoff frequency of the acoustic filter is 5 kHz or less.

[0167] In some embodiments, the gap between the transition wall and the intermediate plate in the direction of vibration, and the gap between the inner cylinder wall and the outer cylinder wall in a direction perpendicular to the direction of vibration are both larger than the gap between the cylindrical side wall and the outer cylinder wall in a direction perpendicular to the direction of vibration.

[0168] In some embodiments, the earphone further includes a battery and a motherboard coupled to the energy conversion device, the adapter housing further includes a case connected to the cylindrical side wall, and the battery or the motherboard is installed on the side of the case facing the energy conversion device.

[0169] In some embodiments, the earphone further includes a functional assembly housed in the case and coupled to the battery and the motherboard, the functional assembly including a first circuit board, a second circuit board, an encoder, a tact switch and a function key, the first and second circuit boards being stacked, the encoder being housed in the first circuit board, the tact switch being housed in the second circuit board and located on the side of the second circuit board facing the first circuit board, and the function key comprising a keytop and the keytop The circuit includes a key rod connected to a key top, the key top being located on the side of the first circuit board away from the second circuit board, the free end of the key rod away from the key top being positioned facing the tact switch, the encoder being fitted onto the key rod, the key rod moving the encoder to generate a first input signal when the user rotates the key rod via the key top, and the key rod triggering the tact switch to generate a second input signal when the user presses the key rod via the key top.

[0170] In some embodiments, the first input signal controls the volume of the earphones up or down, and / or the second input signal controls one of the following: play / pause, next, device pairing, or power on / off of the earphones.

[0171] In some embodiments, the earphone further includes a sound-receiving assembly and a switch assembly, the sound-receiving assembly including a pivot connection block, a connecting rod and a sound-receiving device, the pivot connection block being pivotally attached to the case, one end of the connecting rod being connected to the pivot connection block, the sound-receiving device being mounted on the other end of the connecting rod, a recessed area being provided on the side of the pivot connection block away from the housing, and the switch assembly being mounted within the recessed area.

[0172] In some embodiments, a boss is provided at the bottom of the recessed region, an annular groove is formed between the outer peripheral wall of the boss and the side wall of the recessed region, the switch assembly includes a switch circuit board, an elastic support member, a reinforcing ring and a key, the switch circuit board is provided on top of the boss, the elastic support member includes an integrally provided annular fixing portion and an elastic support portion, the reinforcing ring is backed on the annular fixing portion along its circumferential direction, the annular fixing portion is fixed in the annular groove via the reinforcing ring, the elastic support portion is provided in a dome shape and the key is provided on the elastic support portion.

[0173] In some embodiments, the core module includes a first vibration transmission sheet and a connecting member, the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, the core housing includes a first core housing, a second core housing and an enclosure member, the first core housing includes an inner cylinder wall and a first outer cylinder wall, the inner cylinder wall is located on the outer circumference of the energy converter, the first outer cylinder wall is located on the outer circumference of the inner cylinder wall and is spaced apart from the inner cylinder wall in a direction perpendicular to the vibration direction of the energy converter, the second core housing is connected to the inner cylinder wall and has mounting holes, the vibration panel is located outside the core housing and in contact with the user's skin, the connecting member has one end connected to the vibration panel and the other end inserted into the core housing via the mounting holes and connected to the energy converter, and the enclosure member is connected to the first outer cylinder wall and surrounds the vibration panel.

[0174] In some embodiments, the second core housing includes a first end wall and a first cylindrical side wall connected to the first end wall, the first cylindrical side wall being located between an inner cylindrical wall and a first outer cylindrical wall and locked to the inner cylindrical wall, and the mounting holes being provided in the first end wall.

[0175] In some embodiments, the second core housing presses the peripheral region of the first vibration transmission sheet against the inner cylinder wall.

[0176] In some embodiments, the side of the vibrating panel away from the energy conversion device includes a skin contact area that contacts the user's skin and an edge area connected to the skin contact area, the edge area being located on the outer periphery of the skin contact area and spaced apart from the skin contact area in the vibration direction, the enclosure member including a connecting portion locked to the first outer cylinder wall and a position limiting portion connected to the connecting portion, the connecting portion being cylindrical and located on the outer periphery of the first outer cylinder wall, the position limiting portion being located on the side of the vibrating panel away from the energy conversion device, the position limiting portion overlapping with the edge area and offset from the skin contact area when viewed from the vibration direction, and in the unattached state, the skin contact area protrudes on the side of the position limiting portion away from the energy conversion device in the vibration direction.

[0177] In some embodiments, the side of the vibrating panel away from the energy conversion device further includes an air conduction enhancement region connected between the skin contact region and the edge region, wherein at least a portion of the air conduction enhancement region does not contact the user's skin, and the vibrating panel vibrates the air outside the earphone by the air conduction enhancement region to form sound waves.

[0178] In some embodiments, the air conduction enhancement region is at least partially inclined with respect to the skin contact region, and the inclination angle with respect to the skin contact region is 0 to 75°. And / or, the width of the orthographic projection along the vibration direction of the air conduction enhancement region is 1 mm or more.

[0179] In some embodiments, the earphone further includes an adapter housing rotatably connected to the core housing, the enclosure member further includes a flange portion connected to the connection portion, the flange portion being at least partially spaced apart from the adapter housing in the vibration direction, and, viewed from the vibration direction, the flange portion is located on the outer circumference of the first outer cylinder wall and overlaps with the adapter housing.

[0180] In some embodiments, when not installed, the gap between the flange portion and the adapter housing in the vibration direction, starting from the axis of rotation of the core housing relative to the adapter housing, gradually increases along a reference direction defined as perpendicular to the vibration direction and the direction in which the axis is located, and away from the axis.

[0181] In some embodiments, the maximum gap between the flange portion and the adapter housing in the vibration direction is 2 mm to 5 mm.

[0182] In some embodiments, when viewed from the direction in which the axis is located, the flange portion is installed in an arc shape on the side facing the adapter housing.

[0183] In some embodiments, the first core housing further includes a second outer cylindrical wall and a reinforcing column, the second outer cylindrical wall being located on the outer circumference of the inner cylindrical wall and spaced apart from the inner cylindrical wall in a direction perpendicular to the vibration direction of the energy converter, the second outer cylindrical wall extending in the opposite direction to the first outer cylindrical wall, the reinforcing column connecting the second outer cylindrical wall and the inner cylindrical wall, the adapter housing including a second cylindrical side wall, the second cylindrical side wall being located on the outer circumference of the second outer cylindrical wall, an axial hole provided in one of the reinforcing column and the second cylindrical side wall, and a rotating shaft provided in the other that engages with the axial hole, the rotating shaft being fitted into the axial hole to allow the core housing to rotate relative to the adapter housing.

[0184] In some embodiments, the first core housing further includes a transition wall and a cover plate connected between the inner cylinder wall and the second outer cylinder wall, the cover plate and the transition wall being spaced apart in the vibration direction and together with the second outer cylinder wall and the inner cylinder wall forming a Helmholtz resonant cavity, the Helmholtz resonant cavity communicating with the containment cavity, the air in the containment cavity absorbing the acoustic energy of sound waves generated by the vibration of the energy converter.

[0185] In some embodiments, with respect to the vibration direction, the second outer cylinder wall is located on the outer circumference of the first outer cylinder wall and is located inside the flange portion, allowing the flange portion to overlap with the second cylindrical side wall.

[0186] In some embodiments, the transition wall includes a first sub-transition wall and a second sub-transition wall, the first sub-transition wall connecting the inner cylinder wall and the first outer cylinder wall, the second sub-transition wall connecting the first outer cylinder wall and the second outer cylinder wall, the second sub-transition wall and the first sub-transition wall are spaced apart in the vibration direction, and the second sub-transition wall is closer to the vibration panel than the first sub-transition wall.

[0187] In some embodiments, the earphone includes a connecting wire assembly, the connecting wire assembly including a conductive wire and an auxiliary wire connected to the conductive wire, wherein when the conductive wire is pulled and deformed by an external force, it causes the auxiliary wire to deform accordingly, and the auxiliary wire provides an elastic restorative force that returns the conductive wire to its pre-deformed shape after the external force is released.

[0188] In some embodiments, the conductor is divided into an expandable portion and natural portions located at both ends of the expandable portion, and the elastic modulus of the expandable portion is between the elastic modulus of the natural portion and the elastic modulus of the auxiliary wire.

[0189] In some embodiments, the expandable portion is the portion in which the conductor extends spirally around at least some of the auxiliary lines.

[0190] In some embodiments, in the natural state, the ratio of the length of the expandable portion to the length of the conductor is 0.1 to 0.5.

[0191] In some embodiments, the auxiliary line includes an elastic body and collars located at both ends of the elastic body, each of which is fitted onto the corresponding natural portion and is stopped by a position-limiting structure of the natural portion in the restoring direction of the expandable portion.

[0192] In some embodiments, the position limiting structure is a projection integrally connected to the insulating layer of the conductor, or a bump formed by connecting the natural portions.

[0193] In some embodiments, the support assembly is installed as a head beam assembly, the head beam assembly comprising an arc-shaped head beam member, an adapter member and the connecting wire assembly, wherein the arc-shaped head beam member bypasses the user's head, and both ends of the adapter member are connected to the arc-shaped head beam member and the core module, respectively, and the core module can be extended or retracted relative to the arc-shaped head beam member by external force so as to move closer to or away from the arc-shaped head beam member in the extending direction of the head beam assembly, the connecting wire assembly extends along the arc-shaped head beam member and extends with the extension of the adapter member or returns to its original position with the retraction of the adapter member, and the conductors are electrically connected to the core module.

[0194] In some embodiments, the conductor is divided into an expandable portion and natural portions located at both ends of the expandable portion, and the intermediate region of the expandable portion is fixed to the arc-shaped head beam member.

[0195] In some embodiments, the head beam assembly further includes a pressing member engaged with the arcuate head beam member, the pressing member pressing the intermediate region of the expandable portion against the arcuate head beam member.

[0196] In some embodiments, the pressing member includes a pressing portion and locking portions located at both ends of the pressing portion, each of which locking portions is bent relative to the pressing portion, and the sides of the two locking portions facing the pressing portion extend in the same direction and can move closer to each other by external force, the pressing portion presses against the intermediate region of the expandable portion, and the locking portions lock with the arc-shaped head beam member.

[0197] In some embodiments, the core module includes a first vibration transmission sheet, the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, and includes a bracket, a second vibration transmission sheet, a magnetic circuit system, and a coil, the bracket being connected to the core housing via the first vibration transmission sheet, the second vibration transmission sheet being connected to the first vibration transmission sheet via the bracket, the magnetic circuit system being connected to the central region of the second vibration transmission sheet so as to be suspended within the housing cavity, the coil being inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy converter, the magnetic gap surrounding the location where the magnetic circuit system and the second vibration transmission sheet are connected, and the vibration panel being connected to the bracket.

[0198] In some embodiments, the magnetic circuit system includes a permeable cover and a magnet connected to the bottom of the permeable cover, the magnet being connected to the central region of the second vibration transmission sheet and positioned apart from the side wall of the permeable cover in a direction perpendicular to the vibration direction to form the magnetic gap, the side wall of the permeable cover being positioned apart from the second vibration transmission sheet in the vibration direction to form a passage connecting the magnetic gap to the outside of the magnetic circuit system.

[0199] In some embodiments, the magnet includes a first magnetic member, a permeable member, and a second magnetic member arranged in a stack along the vibration direction, wherein the second magnetic member is closer to the second vibration transmission sheet than the first magnetic member, the magnetization directions of the first magnetic member and the second magnetic member are different, and the side wall of the permeable cover overlaps with at least the permeable member when orthogonally projected onto the outer circumferential surface of the magnet along a direction perpendicular to the vibration direction.

[0200] In some embodiments, the coil, when orthographically projected onto the outer surface of the magnet along a direction perpendicular to the vibration direction, overlaps with at least the permeable member.

[0201] In some embodiments, the bracket includes a first bracket and a second bracket, the first bracket being connected to the central region of the first vibration transmission sheet, the second bracket being connected to the peripheral region of the second vibration transmission sheet, the second bracket and the vibration panel being connected to the first bracket, and the coil being connected to the second bracket.

[0202] In some embodiments, the energy conversion device further includes a suspension, the suspension being connected to the central region of the second vibration transmission sheet, the second bracket being located on the outer periphery of the suspension and spaced apart from the suspension in a direction perpendicular to the vibration direction, and the magnetic circuit system being connected to the suspension.

[0203] In some embodiments, the first bracket and the first vibration transmission sheet are integrally molded by a metal insert injection molding process, and the second bracket and the second vibration transmission sheet are integrally molded by a metal insert injection molding process, and an insertion hole is provided in one of the first bracket and the second bracket, and an insertion column fitted into the insertion hole is provided in the other, and the insertion column is inserted into the insertion hole.

[0204] In some embodiments, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, respectively, the first and second end walls located on opposite sides of the energy converter in the vibration direction, and together with the inner cylindrical wall, surround the housing cavity, the first end wall is provided with a mounting hole, the vibration panel is located outside the core housing, and the core module further includes a connecting member, one end of which is connected to the vibration panel and the other end of which is inserted into the core housing through the mounting hole and connected to the bracket, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed in the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0205] In some embodiments, the housing cavity communicates with the outside of the core module only through a passage which is the gap between the connecting member and the wall surface of the mounting hole. Alternatively, the housing cavity communicates with the outside of the core module only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, which communicates with the outside of the core module via an acoustic filter. Alternatively, the housing cavity communicates with the outside of the core module only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, the ratio of the opening area of ​​the first passage to the opening area of ​​the first passage being 10% or less.

[0206] In some embodiments, the housing cavity communicates with the outside of the core module through a passage which is a gap between the connecting member and the wall surface of the mounting hole, and the core module further includes a sealing membrane that seals the passage.

[0207] In some embodiments, the sealing membrane includes a first connection portion, a wrinkled portion, and a second connection portion which are integrally connected, the wrinkled portion forming a recessed region between the first connection portion and the second connection portion, the first connection portion being connected to the first end wall, and the second connection portion being connected to the connecting member or the vibration panel.

[0208] In some embodiments, when viewed from the direction of vibration, the ratio of the difference between the area of ​​the mounting hole and the area of ​​the connecting member to the area of ​​the mounting hole is greater than 0 and less than or equal to 0.5.

[0209] In some embodiments, the gap between the connecting member and the wall surface of the mounting hole is 0.1 mm or more and 1 mm or less.

[0210] In some embodiments, the earphone includes a support assembly and a core module connected to the support assembly, the support assembly supporting the core module so that it is fitted into a wearing position, the core module includes a core housing, an energy converter, and a vibration panel, the energy converter being housed in a housing cavity of the core housing, the vibration panel being connected to the energy converter and transmitting mechanical vibrations generated by the energy converter to the user, and in the worn state, the center of the vibration panel on the side facing the wearing position, as viewed from the direction in which the coronal axis of the human body is located, is closer to the external auditory canal of the user's ear than the center of the core housing on the side facing the wearing position, as viewed from the direction in which the sagittal axis of the human body is located.

[0211] In some embodiments, the center of the vibration panel orthographically projected onto the core housing along the vibration direction of the energy converter coincides with the center of the energy converter orthographically projected onto the core housing along the vibration direction, and the center of the energy converter orthographically projected onto the core housing along the vibration direction does not coincide with the center of the core housing on the side facing the energy converter in the vibration direction.

[0212] In some embodiments, the center of the energy converter projected onto the core housing along the vibration direction of the energy converter coincides with the center of the core housing on the side facing the energy converter in the vibration direction, while the center of the vibration panel projected onto the core housing along the vibration direction does not coincide with the center of the energy converter projected onto the core housing along the vibration direction.

[0213] In some embodiments, the earphone further includes an adapter housing connecting the core housing and the support assembly, the adapter housing including a cylindrical side wall located on the outer circumference of the core housing, and the orthographic projections of the core housing and the cylindrical side wall onto a reference plane perpendicular to the vibration direction of the energy converter have a first center and a second center, respectively, and in the worn state, the first center is closer to the external auditory canal of the user's ear than the second center.

[0214] In some embodiments, the core housing rotates about a first axis relative to the adapter housing, and the first and second centers are spaced apart along the direction in which the first axis is located.

[0215] In some embodiments, the first center and the second center are located on the first axis.

[0216] In some embodiments, the adapter housing rotates about a second axis relative to the support assembly, the second axis intersects the first axis.

[0217] In some embodiments, the earphone further includes a battery and a motherboard coupled to the energy conversion device, the adapter housing further includes an intermediate plate connected to the inside of the cylindrical side wall and a case engaged with the cylindrical side wall, the battery or the motherboard being placed between the case and the intermediate plate, and the core housing being located on the side of the intermediate plate away from the case.

[0218] In some embodiments, the support assembly is installed as a head beam assembly, which bypasses the user's head and brings the vibrating panel into contact with the user's cheek, and in the fitted state, the head beam assembly forms a first contact point with the user's head, and the vibrating panel forms a second contact point with the user's cheek, and the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body is 20 mm to 30 mm.

[0219] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's crown, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first and second connecting portions, the first and second connecting portions being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the adapter housing, and the intermediate transition portion being inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located.

[0220] In some embodiments, the support assembly is installed as a head beam assembly, which bypasses the user's head and brings the core module into contact with the user's cheek, and further allows the core module to transmit mechanical vibrations generated in the core module by bone conduction, and in the worn state, the head beam assembly forms a first contact point with the user's head, the core module forms a second contact point with the user's cheek, and the head beam assembly further forms a third contact point with the user's head, the third contact point being located between the first and second contact points in the direction of the vertical axis of the human body.

[0221] In some embodiments, when the head beam assembly forms the third contact point with the user's head, at least a portion of the head beam assembly between the first contact point and the second contact point does not come into contact with the user's head.

[0222] In some embodiments, the head beam assembly forms the third contact point with each side of the user's head.

[0223] In some embodiments, both ends of the head beam assembly are connected to one of the core modules, each of which forms the second contact point with the user's cheek.

[0224] In some embodiments, when worn, the earphone applies a pressing force directed toward the user's head at the first contact point, the second contact point, and the third contact point, respectively.

[0225] In some embodiments, the pressing force at the second contact point is 0.2N to 2N, and the pressing force at the third contact point is 0.3N to 2N.

[0226] In some embodiments, the head beam assembly includes an arc-shaped head beam member and two auxiliary members connected to the arc-shaped head beam member, wherein the arc-shaped head beam member bypasses the user's head, the core module is connected to the arc-shaped head beam member, and in the fitted state, the two auxiliary members each form the third contact point with both sides of the user's head.

[0227] In some embodiments, the auxiliary member is elastic, and when the earphone is worn by users with heads of different sizes, the auxiliary member undergoes different degrees of elastic deformation, so that the change in pressing force at the second contact point is 0.2 N or less.

[0228] In some embodiments, the head beam assembly further includes an adapter member connecting the arcuate head beam member and the core module, the adapter member allowing the core module to move closer to or away from the arcuate head beam member in the extending direction of the head beam assembly, the arcuate head beam member providing a first pressing force to the core module in a first operating state, and a second pressing force to the core module in a second operating state, the auxiliary member configured such that the absolute difference between the second pressing force and the first pressing force is 0 to 0.1 N. The first usage state is defined as a usage state in which each adapter member has a first extension amount relative to the arc-shaped head beam member and there is a first gap between the core modules at both ends of the head beam assembly; the second usage state is defined as a usage state in which each adapter member has a second extension amount relative to the arc-shaped head beam member and there is a second gap between the core modules at both ends of the head beam assembly, wherein the second extension amount is greater than the first extension amount and the second gap is greater than the first gap.

[0229] In some embodiments, the first pressing force and the second pressing force are 0.4N to 0.8N, respectively.

[0230] In some embodiments, the first extension amount takes a minimum value when the core module is closest to the arc-shaped head beam member, and the second extension amount takes a maximum value when the core module is furthest from the arc-shaped head beam member.

[0231] In some embodiments, in its natural state, the head beam assembly has a first reference plane and a second reference plane which are orthogonal to each other, the two auxiliary members are positioned symmetrically with respect to the first reference plane, the second reference plane passes through the highest point and two endpoints of the arcuate head beam member and projects the arcuate head beam member and the auxiliary members onto the second reference plane, and within the second reference plane, the line connecting the fixed end and the free end of the auxiliary member has a first projected component in a first reference direction parallel to the line connecting the two endpoints and a second projected component in a second reference direction perpendicular to the line connecting the two endpoints, the ratio of the second projected component to the first projected component is 1 to 5, and / or the equivalent elastic modulus of the auxiliary member is 100 N / m to 180 N / m.

[0232] In some embodiments, in the natural state, the arc-shaped head beam member is projected onto the second reference plane, and a Cartesian coordinate system is established within the second reference plane, wherein the highest point is the origin of the Cartesian coordinate system, the x-axis is a line passing through the origin and parallel to the line connecting the two endpoints, and the y-axis is a line passing through the origin and perpendicular to the x-axis, and the curve from any of the endpoints of the arc-shaped head beam member to the highest point satisfies the following relationship:

[0233]

number

[0234] The thickness of the auxiliary member is 4 mm or less, and the gap between the auxiliary member and the arc-shaped head beam member is 10 mm or more.

[0235] In some embodiments, each auxiliary member is fixed to one end of the arc-shaped head beam member, and the line connecting either of the endpoints of the arc-shaped head beam member to the highest point has a third projection component in a first reference direction parallel to the line connecting the two endpoints, and a fourth projection component in a second reference direction perpendicular to the line connecting the two endpoints, with the ratio of the second projection component to the fourth projection component being 0.1 to 0.5.

[0236] In some embodiments, each of the auxiliary members is cantilevered to the arc-shaped head beam member.

[0237] In some embodiments, with the head lowered, the pressing force at the first contact point forms a first resistance moment with respect to the second contact point; the pressing force at the third contact point forms a second resistance moment with respect to the second contact point; the pressing force at the second contact point forms a third resistance moment with respect to the contact surface of the core module that contacts the user's cheek, if the head beam assembly includes the auxiliary member; the pressing force at the second contact point forms a fourth resistance moment with respect to the contact surface of the core module that contacts the user's cheek, if the head beam assembly does not include the auxiliary member; and the combined moment formed by the first resistance moment, the second resistance moment and the third resistance moment is greater than the combined moment formed by the first resistance moment and the fourth resistance moment.

[0238] In some embodiments, in its natural state, the head beam assembly has a first and second reference plane that are orthogonal to each other, the two auxiliary members are positioned symmetrically with respect to the first reference plane, the second reference plane passes through the highest point and two endpoints of the arcuate head beam member, and projects the arcuate head beam member and the auxiliary members onto the second reference plane, and within the second reference plane, the projected component of the distance from the fixed end of the auxiliary member connected to the arcuate head beam member to the core module adjacent to the auxiliary member, perpendicular to the line connecting the two endpoints, is 40 mm to 120 mm.

[0239] In some embodiments, the auxiliary members extend toward the intermediate region of the arc-shaped head beam member, and in its natural state, the head beam assembly has a first reference plane and a second reference plane that are orthogonal to each other, the two auxiliary members are positioned symmetrically with respect to the first reference plane, the second reference plane passes through the highest point and two endpoints of the arc-shaped head beam member, and projects the arc-shaped head beam member and the auxiliary members onto the second reference plane, and within the second reference plane, the fixed end of the auxiliary member connected to the arc-shaped head beam member has a first distance from the highest point in a reference direction perpendicular to the line connecting the two endpoints, and the position of the core module connected to the head beam assembly has a second distance from the highest point in the reference direction, and the ratio of the first distance to the second distance is 1 / 3 to 1 / 2.

[0240] In some embodiments, the auxiliary members extend toward the ends of the arc-shaped head beam members, and in their natural state, the head beam assembly has a first and second reference plane that are orthogonal to each other, the two auxiliary members are positioned symmetrically with respect to the first reference plane, the second reference plane passes through the highest point and two endpoints of the arc-shaped head beam member, and projects the arc-shaped head beam member and the auxiliary members onto the second reference plane, and within the second reference plane, the fixed end of the auxiliary member connected to the arc-shaped head beam member has a third distance from the highest point in a reference direction perpendicular to the line connecting the two endpoints, and the position of the core module connected to the head beam assembly has a fourth distance from the highest point in the reference direction, and the ratio of the third distance to the fourth distance is 1 / 5 to 1 / 3.

[0241] In some embodiments, the auxiliary member includes a fixed portion, a first extension portion connected to the fixed portion, and a second extension portion connected to the first extension portion, wherein the fixed portion is connected to the arc-shaped head beam member, the first and second extension portions are located on the side of the arc-shaped head beam member facing the user's head when installed, and are spaced apart from the arc-shaped head beam member in their natural state, the width of the second extension portion is greater than the width of the first extension portion, and the second extension portion forms the third contact point with the user's head when installed.

[0242] In some embodiments, the auxiliary member is detachably connected to the arc-shaped head beam member.

[0243] In some embodiments, the area of ​​the second extension that contacts the user's head is 2 cm². 2 ~8cm 2 That is the case.

[0244] In some embodiments, the coefficient of friction of the second extension is greater than that of the first extension.

[0245] In some embodiments, when worn, the second extensions of the two auxiliary members are positioned close to each other toward the back of the user's head, when viewed from the direction in which the vertical axis of the human body is located.

[0246] In some embodiments, in its natural state, the head beam assembly has a first and second reference plane that are orthogonal to each other, the two auxiliary members are positioned symmetrically with respect to the first reference plane, the second reference plane passes through the highest point and two endpoints of the arc-shaped head beam member, and the angle between the mean normal of the second extension of each auxiliary member and the second reference plane is between 5 and 10 degrees.

[0247] In some embodiments, the support assembly is installed as a head beam assembly, which bypasses the user's head and brings the core module into contact with the user's cheek, and further allows the core module to transmit mechanical vibrations generated in the core module by bone conduction, and in the worn state, the core module forms a first contact point with the user's cheek and applies a first pressing force to the user's head, and the head beam assembly forms a second contact point with the user's head and applies a second pressing force to the user's head, the second contact point being closer to the user's head than the first contact point in the direction in which the vertical axis of the human body is located.

[0248] In some embodiments, when the head beam assembly applies the second pressing force to the user's head at the second contact point, at least a portion between the second contact point and the top of the user's head does not come into contact with the user's head.

[0249] In some embodiments, the pressing force at the first contact point is 0.2N to 2N, and the pressing force at the second contact point is 0.3N to 2N.

[0250] In some embodiments, the head beam assembly includes an arc-shaped head beam member and two auxiliary members connected to the arc-shaped head beam member, the arc-shaped head beam member bypassing the user's head, the core module being connected to the arc-shaped head beam member, and in the fitted state, the two auxiliary members each forming the second contact points with both sides of the user's head, the auxiliary members being elastic, and when the earphone is fitted to a user with a head of different size, the auxiliary members undergo different degrees of elastic deformation, so that the change in the first pressing force is 0.2 N or less.

[0251] In some embodiments, with the head lowered, the second pressing force forms a first resistive moment with respect to the first contact point, the pressing force at the first contact point forms a second resistive moment with respect to the contact surface of the core module that contacts the user's cheek, if the head beam assembly includes the auxiliary member, the pressing force at the first contact point forms a third resistive moment with respect to the contact surface of the core module that contacts the user's cheek, if the head beam assembly does not include the auxiliary member, and the combined moment formed by the first resistive moment and the second resistive moment is greater than the third resistive moment.

[0252] In some embodiments, the core module includes a casing member connected to the core housing, the projection of the casing member into a reference plane encloses the outer periphery of the projection of the vibration panel into the reference plane, the reference plane is perpendicular to the vibration direction of the energy converter, the side of the core housing adjacent to the vibration panel forms a cavity together with the vibration panel and the casing member, the casing member is provided with a communication hole that connects the cavity to the outside of the core module, so that in the installed state, the cavity communicates with the outside of the core module through the communication hole.

[0253] In some embodiments, when worn, at least a portion of the surrounding member comes into contact with the user's skin together with the vibrating panel.

[0254] In some embodiments, there exists a target frequency range within the frequency range of 500Hz to 4kHz having an interval length of at least 1 / 3 octave, and within the target frequency range, the sound leakage that occurs when the earphone is worn with the communication hole open is weaker than the sound leakage that occurs when the earphone is worn with the communication hole closed.

[0255] In some embodiments, the target frequency range is 1 kHz to 2 kHz.

[0256] In some embodiments, the number of communication holes is multiple, and the opening ratio of the communication holes in the surrounding member is 30% or more.

[0257] In some embodiments, the enclosure member has at least one communication hole per unit area per square millimeter.

[0258] In some embodiments, the surrounding member is a plastic part with a thickness of 0.2 mm to 1 mm.

[0259] In some embodiments, the surrounding member is a plastic part, and the thickness of the portion that comes into contact with the user's skin is greater than 1 mm.

[0260] In some embodiments, the enclosing member is a plastic part, which is formed into a metal frame by an injection molding process.

[0261] In some embodiments, the enclosing member is a metal component that allows the opening ratio of the communication hole in the enclosing member to be 60% or more.

[0262] In some embodiments, the surrounding member is a steel mesh.

[0263] In some embodiments, the core housing is a first plastic component, the surrounding member is connected to the core housing by a second plastic component, and the second plastic component is integrally molded with the metal component by an injection molding process.

[0264] In some embodiments, the core module includes a first vibration transmission sheet and a connecting member, the energy converter is suspended within the housing cavity via the first vibration transmission sheet, the core housing includes an inner cylinder wall and a first end wall and a second end wall connected to both ends of the inner cylinder wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction, and together with the inner cylinder wall, surrounding the housing cavity, the first end wall having mounting holes, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting holes and connected to the energy converter, the enclosing member being connected to the first end wall and together with the first end wall and the vibration panel surrounding the cavity, and, viewed from the vibration direction, the area of ​​the vibration panel is larger than the area of ​​the mounting holes, and the area of ​​the mounting holes is larger than the area of ​​the connecting member.

[0265] In some embodiments, when viewed from the direction of vibration, the ratio of the difference between the area of ​​the mounting hole and the area of ​​the connecting member to the area of ​​the mounting hole is greater than 0 and less than or equal to 0.5.

[0266] In some embodiments, the housing cavity communicates with the outside of the core module through a passage which is a gap between the connecting member and the wall surface of the mounting hole, and the core module further includes a sealing membrane that seals the passage.

[0267] In some embodiments, the sealing film includes a first connection portion, a wrinkled portion, and a second connection portion that are integrally connected. The wrinkled portion forms a concave region between the first connection portion and the second connection portion. The first connection portion is connected to the first end wall, and the second connection portion is connected to the connection member or the vibration panel.

[0268] In some embodiments, the core module includes an enclosure member. The enclosure member is connected to the core housing. The projection of the enclosure member onto a reference plane surrounds the outer periphery of the projection of the vibration panel onto the reference plane. The reference plane is perpendicular to the vibration direction of the energy conversion device. The side of the core housing close to the vibration panel forms a cavity together with the vibration panel and the enclosure member. The enclosure member has an uneven region on the outer surface facing the user's skin in the mounted state, so that when the enclosure member contacts the user's skin, it does not adhere completely, and further allows communication between the cavity and the outside of the core module.

[0269] In some embodiments, a concave groove is provided on the outer surface of the enclosure member, and the cavity communicates with the outside of the core module through the concave groove.

[0270] In some embodiments, the projection of the enclosure member onto the reference plane has a major axis direction and a minor axis direction that are perpendicular to each other. The dimension of the enclosure member in the major axis direction is larger than the dimension of the enclosure member in the minor axis direction. The number of the concave grooves is plural. The plural concave grooves are divided into four groups. Two groups of the concave grooves are respectively installed at intervals along the major axis direction, and the other two groups of the concave grooves are respectively installed at intervals along the minor axis direction. The number of each group of the concave grooves installed at intervals along the major axis direction is larger than the number of each group of the concave grooves installed at intervals along the minor axis direction.

[0271] In some embodiments, protrusions are provided on the outer surface of the surrounding member, and the protrusions form a gap between the surrounding member and the user's skin in the mounted state, and the cavity communicates with the outside of the core module through the gap.

[0272] In some embodiments, the number of the protrusions is plural, and the plural protrusions form the gap in a grid pattern.

[0273] In some embodiments, there is a target frequency range having a section length of at least 1 / 3 octave within a frequency range of 500 Hz to 4 kHz. When there is a concavo-convex region on the outer surface of the surrounding member within the target frequency range, the sound leakage generated when the earphone is in the mounted state is weaker than the sound leakage generated when the earphone is in the mounted state and there is no concavo-convex region on the outer surface of the surrounding member.

[0274] In some embodiments, the target frequency range is 1 kHz to 2 kHz.

[0275] In some embodiments, the height difference of the concavo-convex region is 0.5 mm to 5 mm.

[0276] In some embodiments, a communication hole for communicating the cavity with the outside of the core module is provided in the surrounding member, so that in the mounted state, the cavity further communicates with the outside of the core module through the communication hole.

[0277] In some embodiments, the number of the communication holes is plural, and the aperture ratio of the communication holes in the surrounding member is 30% or more.

[0278] In some embodiments, the core module includes a first vibration transmission sheet and a connecting member, the energy converter is suspended within the housing cavity via the first vibration transmission sheet, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having mounting holes, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing via the mounting holes and connected to the energy converter, the enclosing member being connected to the first end wall and together with the first end wall and the vibration panel surrounding the cavity, the area of ​​the vibration panel being larger than the area of ​​the mounting holes when viewed from the vibration direction, and the area of ​​the mounting holes being larger than the area of ​​the connecting member.

[0279] In some embodiments, when viewed from the direction of vibration, the ratio of the difference between the area of ​​the mounting hole and the area of ​​the connecting member to the area of ​​the mounting hole is greater than 0 and less than or equal to 0.5.

[0280] In some embodiments, the housing cavity communicates with the outside of the core module through a passage which is a gap between the connecting member and the wall surface of the mounting hole, and the core module further includes a sealing membrane that seals the passage.

[0281] In some embodiments, the sealing membrane includes a first connection portion, a wrinkled portion, and a second connection portion which are integrally connected, the wrinkled portion forming a recessed region between the first connection portion and the second connection portion, the first connection portion being connected to the first end wall, and the second connection portion being connected to the connecting member or the vibration panel.

[0282] In some embodiments, the core module includes a casing member connected to the core housing, the projection of the casing member into a reference plane encloses the outer periphery of the projection of the vibrating panel into the reference plane, the reference plane is perpendicular to the vibration direction of the energy converter, the side of the core housing adjacent to the vibrating panel forms a cavity together with the vibrating panel and the casing member, the casing member has a porous structure on the side facing the user's skin when worn, so that at least a portion of the porous structure contacts the user's skin together with the vibrating panel when worn, allowing communication between the cavity and the outside of the core module.

[0283] In some embodiments, there exists a target frequency range within the frequency range of 500Hz to 4kHz having an interval length of at least 1 / 3 octave, and within the target frequency range, the sound leakage that occurs when the earphone is worn, when the core module has the porous structure, is weaker than the sound leakage that occurs when the earphone is worn, when the core module does not have the porous structure.

[0284] In some embodiments, the target frequency range is 1 kHz to 2 kHz.

[0285] In some embodiments, the porous structure includes a fixed layer and a porous body layer connected to the fixed layer, the porous structure being connected to the enclosure member via the fixed layer, and the porous structure communicating the cavity to the outside of the core module via the porous body layer.

[0286] In some embodiments, the fixed layer is removably connected to the surrounding member.

[0287] In some embodiments, the connection method between the fixed layer and the surrounding member is one of the following: magnetic adsorption type, buckle type, or adhesive type.

[0288] In some embodiments, the fixing layer is an adhesive after curing, the porous structure includes a protective layer covering the porous body layer, and contacts the user's skin through the protective layer.

[0289] In some embodiments, the protective layer is a fabric or a steel mesh.

[0290] In some embodiments, the porosity of the porous body layer is 60% or more.

[0291] In some embodiments, the porous body layer is a foam.

[0292] In some embodiments, the surrounding member is provided with a communication hole that communicates the cavity with the outside of the core module, so that in the mounted state, the cavity further communicates with the outside of the core module through the communication hole.

[0293] In some embodiments, the number of the communication holes is plural, and the aperture ratio of the communication holes in the surrounding member is 30% or more.

[0294] In some embodiments, the core module includes a first vibration transmission sheet and a connecting member, the energy converter is suspended within the housing cavity via the first vibration transmission sheet, the core housing includes an inner cylindrical wall and a first end wall and a second end wall connected to both ends of the inner cylindrical wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylindrical wall, surrounding the housing cavity, the first end wall having mounting holes, the vibration panel being located outside the core housing, the connecting member having one end connected to the vibration panel and the other end inserted into the core housing through the mounting holes and connected to the energy converter, the enclosing member being formed together with the first end wall and the vibration panel surrounding the cavity, and the area of ​​the vibration panel being larger than the area of ​​the mounting holes when viewed from the vibration direction, and the area of ​​the mounting holes being larger than the area of ​​the connecting member.

[0295] In some embodiments, when viewed from the direction of vibration, the ratio of the difference between the area of ​​the mounting hole and the area of ​​the connecting member to the area of ​​the mounting hole is greater than 0 and less than or equal to 0.5.

[0296] In some embodiments, the housing cavity communicates with the outside of the core module through a passage which is a gap between the connecting member and the wall surface of the mounting hole, and the core module further includes a sealing membrane that seals the passage.

[0297] In some embodiments, the sealing membrane includes a first connection portion, a wrinkled portion, and a second connection portion which are integrally connected, the wrinkled portion forming a recessed region between the first connection portion and the second connection portion, the first connection portion being connected to the first end wall, and the second connection portion being connected to the connecting member or the vibration panel.

[0298] In some embodiments, the earphone includes a core module, a battery and a motherboard coupled to the core module, the core module including a core housing and an energy converter installed in a housing cavity of the core housing, which transmits mechanical vibrations generated by the energy converter by bone conduction, the battery is configured to supply power to the motherboard, and the motherboard is configured to control the energy converter converting electrical signals into mechanical vibrations.

[0299] In some embodiments, the core module further includes a first vibration transmission sheet and a vibration panel, the energy converter is suspended within the housing cavity via the first vibration transmission sheet, and the vibration panel is connected to the energy converter and in contact with the user's skin.

[0300] In some embodiments, the earphone further includes a head beam assembly and an adapter housing, the head beam assembly bypassing the top of the user's head and positioning the entire core module in front of the user's ear, the adapter housing having a housing space for housing electronic components, the core housing being elastically connected to the adapter housing, and the core housing or the adapter housing being connected to the head beam assembly.

[0301] In some embodiments, the energy conversion device includes a magnetic circuit system and a coil, the coil being rigidly connected to the core housing to vibrate the core housing.

[0302] In some embodiments, the energy conversion device includes a bracket and a second vibration transmission sheet, the bracket being rigidly connected to the core housing, the second vibration transmission sheet connecting the bracket and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity, and the coil being connected to the bracket and inserted into the magnetic gap of the magnetic circuit system along the direction of vibration.

[0303] In some embodiments, a contact surface is formed on the side of the core housing away from the adapter housing that comes into contact with the user's skin.

[0304] In some embodiments, the adapter housing is installed stacked with the core housing along the vibration direction of the energy converter, and is located on the side of the core housing away from the vibration panel. The adapter housing has a first projected area in a reference plane perpendicular to the vibration direction, and the core housing has a second projected area in the reference plane, with the ratio of the first projected area to the second projected area being 0.2 to 1.5. And / or, along the vibration direction of the energy conversion device, the gap between the core housing and the adapter housing is 1 mm to 10 mm.

[0305] In some embodiments, the battery or the motherboard is supported and fixed by the adapter housing, and is located on the side of the adapter housing facing the energy conversion device.

[0306] In some embodiments, the earphone further includes a head beam assembly which bypasses the top of the user's head and positions the entire core module in front of the user's ear, and the head beam assembly presses the core module against the user's cheek by applying a pressing force of 0.4N to 0.8N.

[0307] In some embodiments, the earphone further includes a head beam assembly and a support member connected to the head beam assembly, wherein the head beam assembly bypasses the top of the user's head, positions the entire core module in front of the user's ears, and the battery or motherboard is housed within the support member.

[0308] In some embodiments, when worn, the support member and the core module are positioned at an interval along the sagittal axis of the human body.

[0309] In some embodiments, the core module is located closer to the front of the user's head than the support member.

[0310] In some embodiments, when worn, the support member and the core module are spaced apart along the vertical axis of the human body, and the core module is further away from the top of the user's head than the support member.

[0311] In some embodiments, the core module includes a core housing, an energy converter, a first vibration transmission sheet, and a vibration panel, wherein the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet, the vibration panel is connected to the energy converter and in contact with the user's skin, and the earphone further includes a battery electrically connected to the energy converter, the battery being spaced apart from the energy converter in the direction of vibration of the energy converter, and the ratio of the battery's capacity to the sum of the weights of the core housing and the battery is 11 mAh / g to 24.5 mAh / g.

[0312] In some embodiments, the earphone includes an adapter housing connected to a core housing, the battery is installed in the adapter housing, and the ratio of the battery capacity to the sum of the weights of the core housing and the adapter housing is 55mAh / g to 220mAh / g.

[0313] In some embodiments, the capacity of the battery is 200mAh or more, and the sum of the weights of the core housing and the adapter housing is 1g to 4g.

[0314] In some embodiments, the ratio of the battery capacity to the surface area of ​​the vibrating panel that comes into contact with the user's skin is 0.37 mAh / mm². 2 ~0.73mAh / mm 2 That is the case.

[0315] In some embodiments, the earphone further includes a head beam assembly connected to the core module, the head beam assembly bypassing the user's head and positioning the core module in front of the user's ears, and in the worn state, the head beam assembly forms a first contact point with the user's head, and the core module forms a second contact point with the user's cheek, with the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body being 20 mm to 30 mm.

[0316] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's crown, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first and second connecting portions, the first and second connecting portions being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the core module, and the intermediate transition portion being inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located.

[0317] In some embodiments, the core housing includes an inner cylinder wall and a first end wall and a second end wall connected to one end of the inner cylinder wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction, respectively, and together with the inner cylinder wall, surrounding the housing cavity, the first end wall having a mounting hole, the vibration panel being located outside the core housing and in contact with the user's skin, the core module further includes a connecting member, one end of which is connected to the vibration panel and the other end of which is inserted into the core housing through the mounting hole and connected to the energy converter, the area of ​​the vibration panel being larger than the area of ​​the mounting hole when viewed from the vibration direction, and the area of ​​the mounting hole being larger than the area of ​​the connecting member.

[0318] In some embodiments, the housing cavity communicates with the outside of the earphone only through a passage which is the gap between the connecting member and the wall surface of the mounting hole. Alternatively, the housing cavity communicates with the outside of the earphone only through a first passage, which is the gap between the connecting member and the wall surface of the mounting hole, and a second passage, which communicates with the outside of the earphone via an acoustic filter.

[0319] In some embodiments, the ratio of the area of ​​the mounting hole to the area of ​​the first end wall, viewed from the direction of vibration, is 0.6 or less.

[0320] In some embodiments, when viewed from the direction of vibration, the ratio of the difference between the area of ​​the mounting hole and the area of ​​the connecting member to the area of ​​the mounting hole is greater than 0 and less than or equal to 0.5.

[0321] In some embodiments, the earphone includes a head beam assembly that bypasses the user's head and positions the core module in front of the user's ears, and when worn, the head beam assembly forms a first contact point with the user's head, and the core module forms a second contact point with the user's cheek, with the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body being 20 mm to 30 mm.

[0322] In some embodiments, the head beam assembly is inclined with respect to the vertical axis of the human body, at least in part, when viewed from the direction in which the coronal axis of the human body is located.

[0323] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's crown, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first and second connecting portions, the first and second connecting portions being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the core module, and the intermediate transition portion being inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located.

[0324] In some embodiments, the bending angle of the first connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°, and / or the bending angle of the second connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°.

[0325] In some embodiments, when worn, the first connecting portion is parallel to the second connecting portion when viewed from the direction in which the coronal axis of the human body is located, and the distance between the first connecting portion and the second connecting portion is 20 mm to 30 mm.

[0326] In some embodiments, the first and second connection portions are provided with wiring cavities, the intermediate transition portion is provided with a slot that connects the wiring cavities of the first and second connection portions so as to allow the wiring of the earphone to extend from the core module through the adapter member to the arc-shaped head beam member, and the head beam assembly further includes a sealing member fitted into the slot, the sealing member covering the wiring.

[0327] In some embodiments, the material of the adapter member is metal, and the material of the arc-shaped head beam member is plastic.

[0328] In some embodiments, the first connecting portion can be extended or retracted relative to the arc-shaped head beam member by an external force.

[0329] In some embodiments, the adapter member and the core module are installed at both ends of the arc-shaped head beam member, and the head beam assembly provides a first pressing force to the core module in a first operating state, and provides a second pressing force to the core module in a second operating state, and the absolute value of the difference between the second pressing force and the first pressing force is 0 to 0.1 N. The first operating state is defined as an operating state in which each adapter member has a first extension amount relative to the arc-shaped head beam member and there is a first spacing between the two core modules, and the second operating state is defined as an operating state in which each adapter member has a second extension amount relative to the arc-shaped head beam member and there is a second spacing between the two core modules, wherein the second extension amount is greater than the first extension amount and the second spacing is greater than the first spacing.

[0330] In some embodiments, the pressing force of the core module against the user's cheek is 0.4N to 0.8N.

[0331] In some embodiments, the earphone includes an adapter housing, the core housing includes a first core housing connected to the adapter housing, the first core housing includes an inner cylinder wall, an outer cylinder wall and a transition wall, the inner cylinder wall is located on the outer circumference of the energy converter, the outer cylinder wall is located on the outer circumference of the inner cylinder wall and is spaced apart from the inner cylinder wall in a direction perpendicular to the vibration direction of the energy converter, the transition wall is connected between the inner cylinder wall and the outer cylinder wall, the outer cylinder wall, the inner cylinder wall and the transition wall form a surrounding acoustic cavity, the acoustic cavity communicates with the containment cavity so that the air in the containment cavity absorbs the acoustic energy of sound waves generated in conjunction with the vibration of the energy converter.

[0332] In some embodiments, the frequency response curve of the sound wave has a resonance peak, and the acoustic cavity is a Helmholtz resonance cavity, which weakens the peak resonance intensity of the resonance peak.

[0333] In some embodiments, the peak resonance frequency of the resonance peak is 500 Hz to 4 kHz, and the difference between the peak resonance intensity of the resonance peak when the opening connecting the Helmholtz resonance cavity and the housing cavity is open and the peak resonance intensity of the resonance peak when the opening connecting the Helmholtz resonance cavity and the housing cavity is closed is 3 dB or more.

[0334] In some embodiments, the first core housing further includes a cover plate connected between the inner cylinder wall and the outer cylinder wall, the cover plate and the transition wall being spaced apart in the vibration direction, and together with the outer cylinder wall, the inner cylinder wall and the transition wall, forming a Helmholtz resonance cavity.

[0335] In some embodiments, the acoustic cavity is an acoustic filter, and the cutoff frequency of the acoustic filter is 5 kHz or less.

[0336] In some embodiments, the first core housing further includes an end wall, the end wall connected to one end of the inner cylindrical wall and forming around the housing cavity, the adapter housing includes a middle plate and a cylindrical side wall connected to the middle plate, the middle plate located on the side of the end wall away from the housing cavity, and the cylindrical side wall located on the outer circumference of the outer cylindrical wall, the end wall, the inner cylindrical wall, the transition wall and the outer cylindrical wall together with the middle plate and the cylindrical side wall forming around the acoustic filter, the sound waves being absorbed by the acoustic filter and then transmitted to the outside of the earphone through the gap between the cylindrical side wall and the outer cylindrical wall.

[0337] In some embodiments, the gap between the transition wall and the intermediate plate in the direction of vibration, and the gap between the inner cylinder wall and the outer cylinder wall in a direction perpendicular to the direction of vibration are both larger than the gap between the cylindrical side wall and the outer cylinder wall in a direction perpendicular to the direction of vibration.

[0338] In some embodiments, the first core housing further includes a reinforcing column connecting the outer cylindrical wall and the inner cylindrical wall, wherein one of the reinforcing column and the cylindrical side wall is provided with an axial hole, and the other is provided with a rotating shaft that engages with the axial hole, the rotating shaft being fitted into the axial hole to allow the core housing to rotate relative to the adapter housing.

[0339] In some embodiments, the earphone further includes a head beam assembly connected to the core module, the head beam assembly bypassing the user's head and bringing the core module into contact with the user's cheek, the head beam assembly including an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's head, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion connected in order, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the adapter housing, the first and second connecting portions being bent and extended in opposite directions relative to the intermediate transition portion, so that when worn, the arc-shaped head beam member is positioned above the user's ears and the core module is positioned in front of the user's ears, viewed from the direction in which the coronal axis of the human body is located.

[0340] In some embodiments, the bending angle of the first connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°, and / or the bending angle of the second connecting portion with respect to the intermediate transition portion is 90° or more and less than 180°.

[0341] In some embodiments, when worn, the first connecting portion is parallel to the second connecting portion when viewed from the direction in which the coronal axis of the human body is located, and the distance between the first connecting portion and the second connecting portion is 20 mm to 30 mm.

[0342] In some embodiments, the earphone includes a first circuit board, a second circuit board, an encoder, a tact switch, and a function key, wherein the first and second circuit boards are stacked and mounted, the encoder is mounted on the first circuit board, the tact switch is mounted on the second circuit board and located on the side of the second circuit board facing the first circuit board, the function key includes a key top and a key rod connected to the key top, the key top is located on the side of the first circuit board away from the second circuit board, the free end of the key rod away from the key top is mounted facing the tact switch, the encoder is fitted onto the key rod, and when a user rotates the key rod via the key top, the key rod moves the encoder to generate a first input signal, and when a user presses the key rod via the key top, the key rod triggers the tact switch to generate a second input signal.

[0343] In some embodiments, the first input signal controls the volume of the earphones up or down, and / or the second input signal controls one of the following: play / pause, next, device pairing, or power on / off of the earphones.

[0344] In some embodiments, the earphone further includes a housing and an adapter ring, the housing including a first cylindrical body, the first circuit board and the second circuit board being stacked and installed inside the first cylindrical body along the axial direction of the first cylindrical body, the adapter ring being fitted onto the outer circumference of the first cylindrical body, the adapter ring being position-restricted along the axial direction of the first cylindrical body and rotatable about the axial direction of the first cylindrical body, the key top being fixedly installed on the adapter ring, and the key rod being inserted into the first cylindrical body along the axial direction of the first cylindrical body.

[0345] In some embodiments, a first buckle is provided on the outer circumferential wall of the first cylindrical body, the adapter ring includes a second cylindrical body, and a second buckle is provided on the inner circumferential wall of the second cylindrical body, the first buckle and the second buckle lock together to restrict the movement of the adapter ring in the direction opposite to the insertion direction of the key rod into the first cylindrical body.

[0346] In some embodiments, a first flange is further provided on the outer circumferential wall of the first cylindrical body, and a second flange is further provided on the outer circumferential wall of the second cylindrical body, the first flange supporting the second flange and restricting the movement of the adapter ring along the insertion direction of the key rod into the first cylindrical body.

[0347] In some embodiments, the key top includes a third cylinder and an end plate, the third cylinder being fitted onto the outer circumference of the second cylinder and supported at one end on the side of the second flange away from the first flange, the end plate being mounted on the other end of the third cylinder, and the key rod being mounted on the end plate.

[0348] In some embodiments, the material of the function key is plastic, and the material of the adapter ring is metal.

[0349] In some embodiments, the earphone includes a head beam assembly that bypasses the user's head and positions the core module in front of the user's ears, and when worn, the head beam assembly forms a first contact point with the user's head, and the core module forms a second contact point with the user's cheek, with the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body being 20 mm to 30 mm.

[0350] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's crown, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first and second connecting portions, the first and second connecting portions being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the core module, and the intermediate transition portion being inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located.

[0351] In some embodiments, the core module includes a first vibration transmission sheet, a vibration panel, and a connecting member; the core housing is connected to the head beam assembly; the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet; the core housing includes an inner cylinder wall and a first end wall and a second end wall, respectively, connected to both ends of the inner cylinder wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylinder wall, surrounding the housing cavity; the first end wall is provided with a mounting hole; the vibration panel is located outside the core housing and in contact with the user's skin; the connecting member is connected at one end to the vibration panel and at the other end inserted into the core housing via the mounting hole and connected to the energy converter; and, viewed from the vibration direction, the area of ​​the vibration panel is larger than the area of ​​the mounting hole, and the area of ​​the mounting hole is larger than the area of ​​the connecting member.

[0352] In some embodiments, the earphone includes a housing, a sound-receiving assembly, and a switch assembly, the sound-receiving assembly includes a pivot connection block, a connecting rod, and a sound-receiving device, the pivot connection block being pivotally attached to the housing, one end of the connecting rod being connected to the pivot connection block, the sound-receiving device being mounted on the other end of the connecting rod, a recessed area being provided on the side of the pivot connection block away from the housing, and the switch assembly being mounted within the recessed area.

[0353] In some embodiments, a boss is provided at the bottom of the recessed area, an annular groove is formed between the outer peripheral wall of the boss and the side wall of the recessed area, the switch assembly includes a switch circuit board, an elastic support member and a key, the switch circuit board is provided on top of the boss, the elastic support member includes an annular fixing portion and an elastic support portion, the annular fixing portion is fixed in the annular groove, the elastic support portion is provided in a dome shape and connected to the annular fixing portion, and the key is provided on the elastic support portion.

[0354] In some embodiments, the annular fixing portion and the elastic support portion are integrally installed, and the earphone further includes a reinforcing ring that is backed by the annular fixing portion along the circumferential direction of the annular fixing portion and connected to the pivot connection block.

[0355] In some embodiments, the reinforcing ring is fitted onto the outer circumference of the annular fixing portion, and its outer wall is fixedly connected to the side wall of the recessed region.

[0356] In some embodiments, the reinforcing ring is a metal member.

[0357] In some embodiments, the key includes a key top, a key rod, and an annular flange, the key rod and the annular flange being connected to the same side of the key top, the annular flange surrounding the key rod, the key rod and the annular flange being fitted into the elastic support, and the key rod overlapping a protruding switch element on the switch circuit board when orthographically projected onto the switch circuit board along the pressing direction of the key.

[0358] In some embodiments, the protruding height of the annular flange is equal to the protruding height of the key rod.

[0359] In some embodiments, the earphone includes a head beam assembly that bypasses the user's head and positions the core module in front of the user's ears, and when worn, the head beam assembly forms a first contact point with the user's head, and the core module forms a second contact point with the user's cheek, with the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body being 20 mm to 30 mm.

[0360] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's crown, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first and second connecting portions, the first and second connecting portions being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the core module, and the intermediate transition portion being inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located.

[0361] In some embodiments, the core module includes a first vibration transmission sheet, a vibration panel, and a connecting member; the core housing is connected to the head beam assembly; the energy converter is suspended within a housing cavity of the core housing via the first vibration transmission sheet; the core housing includes an inner cylinder wall and a first end wall and a second end wall, respectively, connected to both ends of the inner cylinder wall, the first and second end walls being located on opposite sides of the energy converter in the vibration direction of the energy converter, and together with the inner cylinder wall, surrounding the housing cavity; the first end wall is provided with a mounting hole; the vibration panel is located outside the core housing and in contact with the user's skin; the connecting member is connected at one end to the vibration panel and at the other end inserted into the core housing via the mounting hole and connected to the energy converter; and, viewed from the vibration direction, the area of ​​the vibration panel is larger than the area of ​​the mounting hole, and the area of ​​the mounting hole is larger than the area of ​​the connecting member.

[0362] In some embodiments, the earphone includes a head beam assembly, the head beam assembly includes an arc-shaped head beam member, an adapter member and a connecting wire assembly, the arc-shaped head beam member bypasses the user's head, the adapter member is connected to the arc-shaped head beam member and can be extended and retracted relative to the arc-shaped head beam member by external force, the connecting wire assembly includes a conductor extending along the arc-shaped head beam member, the conductor is divided into a fixed portion and natural portions located at both ends of the fixed portion, the fixed portion is fixed to the arc-shaped head beam member and the natural portions are connected to the arc-shaped head beam member to allow the conductor to extend as the adapter member is extended or to return to its original state as the adapter member is retracted.

[0363] In some embodiments, the head beam assembly further includes a pressing member engaged with the arcuate head beam member, the pressing member pressing the position-fixing portion against the arcuate head beam member.

[0364] In some embodiments, the pressing member includes a pressing portion and locking portions located at both ends of the pressing portion, each of which locking portions is bent relative to the pressing portion, and the sides of the two locking portions facing the pressing portion extend in the same direction and can move closer to each other by external force, the pressing portion presses against the position-fixing portion, and the locking portions lock with the arc-shaped head beam member.

[0365] In some embodiments, the arc-shaped head beam member includes an inner chamber forming body and an outer cover connected to the inner chamber forming body, wherein the inner chamber forming body contacts the user's head, the conductor is located between the inner chamber forming body and the outer cover, and the pressing member is locked to the outer cover.

[0366] In some embodiments, the arc-shaped head beam member further includes an inner cover, the inner cover and the inner chamber forming body are connected to the same side of the outer cover, and the inner cover and the outer cover sandwich the adapter member.

[0367] In some embodiments, the conductor is further divided into an expandable portion located between the fixed-position portion and the natural portion, wherein the elastic modulus of the expandable portion is greater than the elastic modulus of either the fixed-position portion or the natural portion.

[0368] In some embodiments, the connecting wire assembly further includes auxiliary wires connected to the two natural portions, the elastic modulus of the auxiliary wires being greater than that of the stretchable portions to provide an elastic restorative force when the conductor is stretched.

[0369] In some embodiments, the auxiliary line includes an elastic body and collars located at both ends of the elastic body, each of which is fitted onto the corresponding natural portion and is stopped by a position-limiting structure of the natural portion in the restoring direction of the expandable portion.

[0370] In some embodiments, the position limiting structure is a projection integrally connected to the insulating layer of the conductor, or a bump formed by connecting the natural portions.

[0371] In some embodiments, both ends of the arc-shaped head beam member are each connected to one of the core modules via one of the adapter members, the battery is connected to one of the two core modules, the motherboard is connected to the other of the two core modules, and the battery and the motherboard are electrically connected via the conductors.

[0372] In some embodiments, the earphone includes a head beam assembly, the head beam assembly includes an arc-shaped head beam member, an adapter member and a damper, the arc-shaped head beam member bypasses the user's head and includes an inner chamber forming body, an inner cover and an outer cover, the inner chamber forming body contacts the user's head, the inner cover and the inner chamber forming body are connected to the same side of the outer cover, the inner cover and the outer cover clamp the adapter member, the outer cover is provided with a first guide groove for guiding the adapter member to move relative to the outer cover, the damper is positioned on the side of the adapter member facing the inner cover and protrudes from the first guide groove, the damper further abuts the inner cover to provide resistance during the process of the adapter member extending and retracting relative to the arc-shaped head beam member.

[0373] In some embodiments, a housing groove is provided at one end of the adapter member adjacent to the inner chamber forming body, and the damper is installed in the housing groove, with a portion of it protruding from the adapter member.

[0374] In some embodiments, a slider is provided at one end of the adapter member adjacent to the inner chamber forming body, a stopper is provided at the other end of the first guide groove of the outer cover away from the inner chamber forming body to secure the slider, and the housing groove is provided for the slider.

[0375] In some embodiments, the inner cover is provided with a second guide groove that guides the damper during the process in which the adapter member extends and retracts relative to the arc-shaped head beam member.

[0376] In some embodiments, the earphone further includes a connecting wire assembly positioned between the inner chamber forming body and the outer lid, the connecting wire assembly including a conductor, the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first connecting portion and the second connecting portion, the first connecting portion and the second connecting portion being bent relative to the intermediate transition portion and extending in opposite directions, the slider being positioned in the first connecting portion, the first connecting portion and the second connecting portion each having a wiring cavity, the intermediate transition portion having a slot, the slot communicating the wiring cavities of the first connecting portion and the second connecting portion so as to allow the conductor to be further drilled in the adapter member.

[0377] In some embodiments, the conductor is divided into an expandable portion and natural portions located at both ends of the expandable portion, wherein the elastic modulus of the expandable portion is greater than that of the natural portions, and the natural portions are connected to the adapter member such that the conductor stretches as the adapter member is extended or returns to its original state as the adapter member is retracted.

[0378] In some embodiments, the connecting wire assembly further includes auxiliary wires connected to the two natural portions, the elastic modulus of the auxiliary wires being greater than that of the stretchable portions to provide an elastic restorative force when the conductor is stretched.

[0379] In some embodiments, the auxiliary line includes an elastic body and collars located at both ends of the elastic body, each of which is fitted onto the corresponding natural portion and is stopped by a position-limiting structure of the natural portion in the restoring direction of the expandable portion.

[0380] In some embodiments, the position limiting structure is a projection integrally connected to the insulating layer of the conductor, or a bump formed by connecting the natural portions.

[0381] In some embodiments, both ends of the arc-shaped head beam member are each connected to one of the core modules via one of the adapter members, the battery is connected to one of the two core modules, the motherboard is connected to the other of the two core modules, and the battery and the motherboard are electrically connected via the conductors.

[0382] In some embodiments, the earphone includes a head beam assembly, the head beam assembly includes an arc-shaped head beam member that bypasses the user's head, the arc-shaped head beam member includes an inner chamber forming body, an inner cover and an outer cover, the inner chamber forming body being elastic and in contact with the user's head, the inner cover and the inner chamber forming body being connected to the same side of the outer cover, the end of the inner chamber forming body being inserted between the inner cover and the outer cover, and the inner chamber forming body being able to partially retract from between the inner cover and the outer cover as the ends of the head beam assembly are gradually pulled apart in directions away from each other.

[0383] In some embodiments, the inner cover and the outer cover are integrally molded structural members.

[0384] In some embodiments, the end of the inner chamber forming body is provided with a through hole, and a post is provided on the side of the inner cover facing the outer cover, the radial dimension of the post being smaller than the radial dimension of the through hole, so that as the ends of the head beam assembly are gradually pulled apart in a direction away from each other, the inner chamber forming body partially retracts from between the inner cover and the outer cover and is stopped by the post.

[0385] In some embodiments, the through-hole is an oval-shaped hole whose longitudinal direction is aligned with the extension direction of the arc-shaped head beam member.

[0386] In some embodiments, the number of through-holes and posts is two, the two through-holes are spaced apart in a direction perpendicular to the extension direction of the head beam assembly, and the two posts are each inserted into one of the through-holes.

[0387] In some embodiments, the head beam assembly further includes an adapter member, the inner cover and the outer cover clamp the adapter member, and the adapter member can be extended and retracted relative to the arc-shaped head beam member by external force.

[0388] In some embodiments, the earphone further includes a connecting wire assembly positioned between the inner chamber forming body and the outer lid, the connecting wire assembly including a conductor, the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first connecting portion and the second connecting portion, the first connecting portion and the second connecting portion being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion and the second connecting portion each having a wiring cavity, the intermediate transition portion having a slot, the slot communicating the wiring cavities of the first connecting portion and the second connecting portion so as to allow the conductor to be further drilled in the adapter member.

[0389] In some embodiments, the conductor is divided into an expandable portion and natural portions located at both ends of the expandable portion, wherein the elastic modulus of the expandable portion is greater than that of the natural portions, and the natural portions are connected to the adapter member such that the conductor stretches as the adapter member is extended or returns to its original state as the adapter member is retracted.

[0390] In some embodiments, the connecting wire assembly further includes auxiliary wires connected to the two natural portions, the elastic modulus of the auxiliary wires being greater than that of the stretchable portions to provide an elastic restorative force when the conductor is stretched.

[0391] In some embodiments, the auxiliary line includes an elastic body and collars located at both ends of the elastic body, each of which is fitted onto the corresponding natural portion and is stopped in the restoring direction of the expandable portion by a position-limiting structure of the natural portion, the position-limiting structure being a projection integrally connected to the insulating layer of the conductor, or the position-limiting structure being a knot formed by connecting the natural portions.

[0392] In some embodiments, both ends of the arc-shaped head beam member are each connected to one of the core modules via one of the adapter members, the battery is connected to one of the two core modules, the motherboard is connected to the other of the two core modules, and the battery and the motherboard are electrically connected via the conductors.

[0393] In some embodiments, the earphone includes a headbeam assembly, the headbeam assembly includes an arc-shaped headbeam member that bypasses the user's head, the arc-shaped headbeam member is divided into an intermediate portion and end portions connected to both ends of the intermediate portion, the arc length of the end portions being shorter than the arc length of the intermediate portion, and the two end portions are deflected in a direction away from each other relative to the intermediate portion as the ends of the headbeam assembly are gradually pulled apart in a direction away from each other.

[0394] In some embodiments, the earphone includes a housing, a sound-receiving assembly, and a damper, the sound-receiving assembly includes a pivot connection block, a connecting rod, and a sound-receiving device, one of the pivot connection block and the housing forming a pivot hole, the other forming a pivot into the pivot hole, one end of the connecting rod being connected to the pivot connection block, the sound-receiving device being mounted on the other end of the connecting rod, the damper being located in a region where the pivot connection block and the housing overlap axially with the pivot hole, the damper being connected to one of the pivot connection block and the housing and in contact with the other of the pivot connection block and the housing so as to provide resistance as the sound-receiving assembly rotates relative to the housing.

[0395] In some embodiments, the damper is installed in a housing groove of the housing and protrudes from the housing groove.

[0396] In some embodiments, the damper is arc-shaped when viewed from the axial direction of the pivot hole and is installed concentrically with the pivot hole.

[0397] In some embodiments, the number of dampers is multiple, and the multiple dampers are installed at intervals around the pivot hole.

[0398] In some embodiments, the side of the pivot connection block facing the housing forms the pivot, and the side of the pivot connection block away from the housing has a recessed area, and the earphone further includes a switch assembly located within the recessed area.

[0399] In some embodiments, a boss is provided at the bottom of the recessed area, an annular groove is formed between the outer peripheral wall of the boss and the side wall of the recessed area, the switch assembly includes a switch circuit board, an elastic support member and a key, the switch circuit board is provided on top of the boss, the elastic support member includes an annular fixing portion and an elastic support portion, the annular fixing portion is fixed in the annular groove, the elastic support portion is provided in a dome shape and connected to the annular fixing portion, and the key is provided on the elastic support portion.

[0400] In some embodiments, the annular fixing portion and the elastic support portion are integrally installed, and the earphone further includes a reinforcing ring that is backed by the annular fixing portion along the circumferential direction of the annular fixing portion and connected to the pivot connection block.

[0401] In some embodiments, the reinforcing ring is fitted onto the outer circumference of the annular fixing portion, and its outer wall is fixedly connected to the side wall of the recessed region.

[0402] In some embodiments, the earphone further includes a head beam assembly, the core module being connected to the head beam assembly via the housing, the head beam assembly bypassing the user's head and positioning the core module in front of the user's ears, and in the worn state, the head beam assembly forming a first contact point with the user's head, and the core module forming a second contact point with the user's cheek, the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body being 20 mm to 30 mm.

[0403] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's crown, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first and second connecting portions, the first and second connecting portions being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the core module, and the intermediate transition portion being inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located.

[0404] In some embodiments, the earphone includes a housing, a sound-receiving assembly, a conductor, and a partition plate, wherein the sound-receiving assembly includes a pivot connection block, a connecting rod, and a sound receiver, the pivot connection block being inserted into a pivot hole in the housing and allowing the sound-receiving assembly to rotate relative to the housing, one end of the connecting rod being connected to the pivot connection block, the sound receiver being mounted at the other end of the connecting rod, the conductor extending through the inside of the pivot connection block and the connecting rod and electrically connected to the sound receiver, and the partition plate being fixed inside the housing and separating the pivot connection block from the conductor.

[0405] In some embodiments, the partition plate covers a portion of the pivot connection block in the circumferential direction of the pivot hole and is partially inserted into the pivot hole.

[0406] In some embodiments, the pivot connection block is configured such that the sound-receiving assembly is stopped by the partition plate after it has rotated an angle relative to the housing.

[0407] In some embodiments, the pivot connection block includes a pivot and return portions and operating portions connected to both ends of the pivot, the pivot being located within the pivot hole, the return portions and operating portions being located on opposite sides of the housing to lock the pivot connection block and the housing in the axial direction of the pivot hole, the connecting rod being connected to the operating portion, and the partition plate including a fixed portion connected to the housing and an arc-shaped extension portion connected to the fixed portion, the fixed portion covering a portion of the return portion and spaced apart from the return portion in the axial direction of the pivot hole, the arc-shaped extension portion being inserted into the pivot and spaced apart from the pivot in the radial direction of the pivot hole, the conductor being entangled with the arc-shaped extension portion and the fixed portion as it passes through the pivot hole, and the return portion being stopped by the fixed portion after the sound-collecting assembly has rotated an angle relative to the housing.

[0408] In some embodiments, the earphone further includes a circuit board fixed within the housing, the housing having hot melt columns installed thereon, the fixing portion and the circuit board being fitted onto the hot melt columns, and the sound receiver being electrically connected to the circuit board via the conductors.

[0409] In some embodiments, a recessed area is provided on the side of the pivot connection block away from the housing, and the earphone further includes a switch assembly located within the recessed area.

[0410] In some embodiments, a boss is provided at the bottom of the recessed area, an annular groove is formed between the outer peripheral wall of the boss and the side wall of the recessed area, the switch assembly includes a switch circuit board, an elastic support member and a key, the switch circuit board is provided on top of the boss, the elastic support member includes an annular fixing portion and an elastic support portion, the annular fixing portion is fixed in the annular groove, the elastic support portion is provided in a dome shape and connected to the annular fixing portion, and the key is provided on the elastic support portion.

[0411] In some embodiments, the annular fixing portion and the elastic support portion are integrally installed, and the earphone further includes a reinforcing ring that is backed by the annular fixing portion along the circumferential direction of the annular fixing portion and connected to the pivot connection block.

[0412] In some embodiments, the earphone further includes a head beam assembly, the core module being connected to the head beam assembly via the housing, the head beam assembly bypassing the user's head and positioning the core module in front of the user's ears, and in the worn state, the head beam assembly forming a first contact point with the user's head, and the core module forming a second contact point with the user's cheek, the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body being 20 mm to 30 mm.

[0413] In some embodiments, the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypassing the user's crown, and the adapter member including a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connecting the first and second connecting portions, the first and second connecting portions being bent relative to the intermediate transition portion and extending in opposite directions, the first connecting portion being connected to the arc-shaped head beam member, and the second connecting portion being connected to the core module, and the intermediate transition portion being inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located. [Brief explanation of the drawing]

[0414] To more clearly explain the technical solutions in the embodiments of the present application, the following briefly introduces the drawings necessary for describing the embodiments. Clearly, the drawings in the following description are only a few embodiments of the present application, and those skilled in the art can obtain other drawings based on these without requiring any creative effort.

[0415] [Figure 1] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 2] This is a schematic diagram of one embodiment of the relative positional relationship between the connecting member and the vibration panel in the earphone according to the present invention. [Figure 3] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 4] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 5] This is a schematic diagram of one embodiment of the vibration panel according to the present invention. [Figure 6] This is a schematic diagram of one embodiment of the vibration panel according to the present invention. [Figure 7] This is a schematic diagram of one embodiment of the vibration panel according to the present invention. [Figure 8] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 9] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 10] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 11] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 12] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 13] This is a schematic diagram of one embodiment of the earphones according to the present invention in a worn state. [Figure 14] This is a schematic diagram of one embodiment of the earphones according to the present invention in a worn state. [Figure 15]This is a schematic diagram of one embodiment of the earphones according to the present invention in a worn state. [Figure 16] This is a schematic diagram of one embodiment of the earphones according to the present invention in a worn state. [Figure 17] This is a schematic diagram of one embodiment of the earphones according to the present invention in a worn state. [Figure 18] This is a schematic diagram of the mechanical model of the bending deformation of a cantilever beam relating to the present invention. [Figure 19] This is a schematic diagram of a mechanical model of one embodiment of the head beam assembly according to the present application. [Figure 20] Figure 12 is an exploded view of one embodiment of an earphone. [Figure 21] Figure 20 is an exploded view of the earphones from a different perspective. [Figure 22] This is a partially enlarged view of the E1 region of the adapter member in Figure 20. [Figure 23] Figure 12 is an exploded view of one embodiment of an earphone. [Figure 24] Figure 12 is an exploded view of one embodiment of an earphone. [Figure 25] This is a schematic diagram of one embodiment of the earphones according to the present invention in a worn state. [Figure 26] This is a schematic diagram of one embodiment of the earphones according to the present invention in a worn state. [Figure 27] Figure 12 is a cross-sectional view of one embodiment of an earphone. [Figure 28] Figure 27 is a cross-sectional view of the earphone from a different perspective. [Figure 29] Figure 27 is a cross-sectional view of the earphone from a different perspective. [Figure 30] This is a cross-sectional view of one embodiment of the earphone according to the present application. [Figure 31] This is a cross-sectional view of one embodiment of the earphone according to the present application. [Figure 32] Figure 12 is a cross-sectional view of one embodiment of an earphone. [Figure 33] Figure 32 is a cross-sectional view of the earphone from a different perspective. [Figure 34]This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 35] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 36] This is a schematic diagram of an equivalent model of one embodiment of the earphone according to the present invention. [Figure 37] This is the frequency response curve of the vibration of the vibration panel when the earphones relating to this application are not being worn. [Figure 38] This is the frequency response curve of the vibration of the vibration panel when the earphones relating to the present invention are not being worn and the first vibration transmission sheet has different rigidities. [Figure 39] This is the frequency response curve of the vibration of the vibration panel when the earphones relating to the present invention are not being worn and the second vibration transmission sheet has different rigidities. [Figure 40] This is the frequency response curve of the vibration of the vibration panel when the earphones relating to this application are not being worn and their core housings have different masses. [Figure 41] This is the frequency response curve of the vibration of the vibration panel when the earphones relating to the present invention are not being worn, and the first vibration transmission sheet and the second vibration transmission sheet have different rigidities. [Figure 42] This is the frequency response curve of sound leakage in one embodiment of the present invention, where the two earphones are not being worn. [Figure 43] This is a schematic diagram of the side of the earphone facing the user's skin in one embodiment of the present invention. [Figure 44] This is a schematic diagram of the side of the earphone facing the user's skin in one embodiment of the present invention. [Figure 45] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 46] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 47] Figure 46 is a schematic diagram of one embodiment of the bracket. [Figure 48] Figure 12 is a schematic diagram of the side of the earphone facing the user's head, representing one embodiment of the earphone. [Figure 49]This is a schematic diagram of the mechanical model for different wearing methods of the earphones relating to the present invention. [Figure 50] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 51] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 52] This is a schematic diagram of one embodiment of the earphone according to the present invention. [Figure 53] This is an exploded view of one embodiment of the arc-shaped head beam member according to the present invention. [Figure 54] Figure 53 is a cross-sectional view of one embodiment of an arc-shaped head beam member. [Figure 55] A partially exploded view of one embodiment of the head beam assembly according to the present application. [Figure 56] This is a schematic diagram of the local structure in a different state of one embodiment of the head beam assembly according to the present application. [Figure 57] This is an exploded view of one embodiment of the connecting wire assembly according to the present invention. [Figure 58] This is an exploded view of one embodiment of the earphone according to the present invention. [Figure 59] Figure 58 is a schematic diagram of the earphones from a different perspective. [Figure 60] This is a cross-sectional view of one embodiment of the earphone according to the present application. [Figure 61] This is the frequency response curve of sound leakage in one embodiment of the present invention, where the two earphones are not being worn. [Figure 62] Figure 27 is a cross-sectional view of one embodiment of an earphone. [Modes for carrying out the invention]

[0416] The present application will be described in further detail below with reference to the drawings and embodiments. The following embodiments are for illustrative purposes only and do not limit the scope of the present application. Similarly, the following embodiments represent only a selection of the present application, not all embodiments. All other embodiments, which a person skilled in the art could obtain without creative effort, are all included within the scope of the present application.

[0417] References to “Examples” in this Application mean that certain features, structures, or properties described in relation to the Examples are included in at least one Example of this Application. Those skilled in the art will understand, both explicitly and implicitly, that the Examples described in this Application can be combined with other Examples.

[0418] In this application, the earphone 10 may include a core module 11 that generates at least bone conduction sound and, when worn, contacts the user's skin (e.g., cheek) to allow the "opening" of the user's ear canal. In other words, as will be illustrated later, if the user's ear canal is open and not blocked or shielded by the earphone 10, the earphone 10 may generate air conduction sound. In this case, the sound generated by the earphone 10 can be primarily bone conduction sound with air conduction sound as a supplement; that is, the air conduction sound enhances the bone conduction sound and further improves the sound quality of the earphone 10.

[0419] Furthermore, bone conduction sound as described in this application refers to the transmission of mechanical vibrations generated by the core module 11 mainly through a medium such as the user's skull, while air conduction sound as described in this application refers to the transmission of mechanical vibrations generated by the core module 11 mainly through a medium such as air. In addition, two core modules 11 can be installed as described in this application, and both core modules 11 can convert electrical signals into mechanical vibrations so that the earphone 10 achieves a stereo effect. Therefore, in other application scenes where the requirement for stereo is not particularly high, such as hearing assistance for hearing-impaired patients or presentation of lines to a presenter during a live broadcast, only one core module 11 may be installed in the earphone 10, and the omitted core module 11 may be replaced by a structural member that assists in wearing the earphone 10.

[0420] As shown in Figure 1, the core module 11 may include a core housing 111 and an energy converter 112 installed in the housing cavity 100 of the core housing 111, the energy converter 112 converting electrical signals into mechanical vibrations. In this case, the core module 11 can transmit the mechanical vibrations generated by the energy converter 112 mainly by bone conduction, and further form bone conduction sound.

[0421] In some embodiments, when worn, the core module 11 may be in direct contact with the user's skin via the core housing 111, that is, the core module 11 directly transmits mechanical vibrations generated by the energy conversion device 112 via the core housing 111. Thus, the earphone 10 does not need to include structural members such as the first vibration transmission sheet 113 and vibration panel 114, which will be described later. At the same time, the core housing 111 also vibrates the air outside the earphone 10, further generating sound leakage. In this case, in order to reduce sound leakage from the earphone 10, the core housing 111 may have through holes (which may be defined as "sound leakage reduction holes") that connect the housing cavity 100 and the outside of the earphone 10, thereby allowing the sound waves output to the outside of the earphone 10 through the sound leakage reduction holes and the sound leakage generated by the core housing 111 in conjunction with the vibration of the energy conversion device 112 to cancel each other out in the far field (commonly referred to as "sound leakage reduction by drilling holes").

[0422] In some other embodiments, the core module 11 may further include a first vibration transmission sheet 113 and a vibration panel 114. The energy converter 112 may be suspended within the housing cavity 100 via the first vibration transmission sheet 113, and the vibration panel 114 may be located at least partially outside the housing cavity of the core housing 11 and connected to the energy converter 112, transmitting mechanical vibrations generated in the energy converter 112 to the user. Accordingly, one end of the core housing 111 adjacent to the vibration panel 114 is an open structure. In this case, when worn, the core module 11 can come into contact with the user's skin via the vibration panel 114, i.e., the core module 11 transmits mechanical vibrations generated in the energy converter 112 via the vibration panel 114. At the same time, the presence of the first vibration transmission sheet 113 means that the mechanical vibrations generated in the energy conversion device 112 do not need to be significant and do not need to be transmitted to the core housing 111, thus minimizing the vibration of the air outside the earphone 10 by the core housing 111 and further reducing sound leakage from the earphone 10. Naturally, sound leakage from the earphone 10 may be further reduced by drilling holes to reduce sound leakage.

[0423] In some other embodiments, for example as shown in Figure 1, the core module 11 similarly transmits mechanical vibrations generated in the energy converter 112 via the vibration panel 114, the difference being that one end of the core housing 111 adjacent to the vibration panel 114 is not an open structure, i.e., the other part other than the mounting hole 1111 described later may be a sealed structure. In this case, the core housing 111 itself can reduce sound leakage from the earphone 10 based on the acoustic dipole, reducing the need to separately drill sound leakage reduction holes in the core housing 111, and in some cases eliminating the need for them. As shown in Figure 42, in Figure 42, frequency response curves 42_1 and 42_2 represent the sound leakage from the earphone 10 when one end of the core housing 111 adjacent to the vibration panel 114 is an open structure, and the sound leakage from the earphone 10 when one end of the core housing 111 adjacent to the vibration panel 114 is a sealed structure, respectively. Clearly, compared to the case where one end of the core housing 111 adjacent to the vibration panel 114 has an open structure, when the end of the core housing 111 adjacent to the vibration panel 114 has a sealed structure, sound leakage from the earphone 10 is significantly reduced.

[0424] For example, the core module 11 may further include a connecting member 115 that connects the vibration panel 114 and the energy conversion device 112, and the core housing 111 is provided with a mounting hole 1111 for attaching the connecting member 115. In this case, the vibration panel 114 is located outside the core housing 111 so as to be in contact with the user's skin, and the connecting member 115 has one end connected to the vibration panel 114 and the other end inserted into the core housing 111 through the mounting hole 1111 and connected to the energy conversion device 112. In this way, even though some of the mechanical vibrations generated in the energy conversion device 112 are transmitted to the core housing 111 via the first vibration transmission sheet 113, the first end wall 1113 and the second end wall 1114 have opposite phases of sound leakage generated by the vibration of the energy conversion device 112, and the two cancel each other out in the far field, further reducing sound leakage from the earphone 10. Based on this, the core housing 111 may have fewer, or even no, sound leakage reduction holes, further improving the waterproof and dustproof performance of the earphone 10. Preferably, when viewed from the vibration direction of the energy conversion device 112, the area of ​​the vibration panel 114 is larger than the area of ​​the mounting hole 1111, and the area of ​​the mounting hole 1111 is larger than the area of ​​the connecting member 115. In this way, the transmission of mechanical vibrations generated in the energy conversion device 112 to the core housing 111 via the connecting member 115 is avoided, and sound leakage from the earphone 10 is further reduced. In this case, the gap between the connecting member 115 and the wall surface of the mounting hole 1111 works in cooperation with the housing cavity 100 to form a Helmholtz resonant cavity, and the resonant frequency of the Helmholtz resonant cavity may be 4 kHz or less, preferably 2 kHz or less, and more preferably 1 kHz or less.

[0425] Exemplary, the core housing 111 may include an inner cylindrical wall 1112 and first end walls 1113 and second end walls 1114 connected to both ends of the inner cylindrical wall 1112, respectively, the inner cylindrical wall 1112 being located on the outer circumference of the energy conversion device 112, and the first end walls 1113 and second end walls 1114 being located on opposite sides of the energy conversion device 112 in the vibration direction of the energy conversion device 112, and together with the inner cylindrical wall 1112 forming a surrounding cavity 100. Viewed from the vibration direction of the energy conversion device 112, the cross-section of the inner cylindrical wall 1112 is one of the following shapes: circular, elliptical, racetrack-shaped, polygonal, etc., and may be irregular in whole or in part. Furthermore, in the fitted state, the first end wall 1113 is closer to the user's skin than the second end wall 1114. In this case, mounting holes 1111 are provided in the first end wall 1113. Naturally, in some other embodiments where the need for sound leakage reduction is not severe or where sound leakage is reduced by drilling, the core housing 111 does not have to include the first end wall 1113 and / or the second end wall 1114, and the side of the energy converter 112 away from the vibration panel 114 may be protected by other structural members (e.g., the adapter housing 13 described later). In some other embodiments where the core module 11 does not have a vibration panel 114, the core housing 111 may be in direct contact with the user's skin via the first end wall 1113.

[0426] The inventors of this invention discovered the following during a long research and development process. As shown in Figure 61, the frequency response curves 61_1 and 61_2 in Figure 61 represent the sound leakage of the earphone 10 when the core housing 111 has a large volume and when the core housing 111 has a small volume, respectively. Clearly, when the core housing 111 has a small volume, the sound leakage of the earphone 10 is significantly reduced compared to when the core housing 111 has a large volume. For example, sound leakage in the frequency range of 1kHz to 2kHz is significantly reduced, and sound leakage in the frequency range of 3kHz to 4kHz is significantly reduced, both of which are frequency ranges that are sensitive to the human ear. Sound leakage in the frequency range of 1kHz to 2kHz contains many voice components and greatly affects the user's subjective perception, so by maintaining sound leakage in this frequency range at a low level, the earphone 10 can be made more competitive in the market. Based on this, if the core housing 111 satisfies the conditions for housing the energy conversion device 112, the volume of the core housing 111 shall be 3 cm² to reduce sound leakage from the earphone 10. 3 The following may also be the case. The volume of the core housing 111 can be measured by pouring water into it. Furthermore, the volume of the core housing 111 can be changed by adjusting the radial dimension of the inner cylinder wall 1112 in a direction perpendicular to the vibration direction of the energy conversion device 112, or by adjusting the radial gap between the inner cylinder wall 1112 and the energy conversion device 112 in a direction perpendicular to the vibration direction of the energy conversion device 112. For example, if the conditions are met that the energy conversion device 112 does not collide with the core housing 111 during the vibration process, the aforementioned radial dimension or radial gap can be made as small as possible, thereby reducing sound leakage from the earphone 10. In addition, the impact resistance of the earphone 10 can be improved. This is because, with the aforementioned small radial dimension or radial gap, the energy conversion device 112 has a small stroke in impact situations such as dropping, resulting in less deformation of structural members such as the first vibration transmission sheet 113 and the second vibration transmission sheet 1122, making plastic deformation or fracture less likely and resulting in higher reliability.

[0427] The energy conversion device 112 is suspended within the housing cavity 100 via the first vibration transmission sheet 113. For example, the energy conversion device 112 is connected to the central region of the first vibration transmission sheet 113, and the peripheral region of the first vibration transmission sheet 113 is connected to the core housing 111. However, the relative position of the first vibration transmission sheet 113 can be reasonably adjusted according to actual needs. For example, the first vibration transmission sheet 113 is located within the housing cavity 100, specifically, on the side of the first end wall 1113 that is close to the second end wall 1114. In other words, the area of ​​the mounting hole 1111 may be smaller than the area of ​​the first vibration transmission sheet 113 when viewed from the vibration direction of the energy conversion device 112, and here the area of ​​the first vibration transmission sheet 113 may be defined as the area of ​​the region enclosed by the maximum outer boundary of the orthographic projection of the first vibration transmission sheet 113 along the vibration direction of the energy conversion device 112. Alternatively, for example, the first vibration transmission sheet 113 may be located within the mounting hole 1111, or part of the first vibration transmission sheet 113 may be located within the housing cavity 100 and part of the mounting hole 1111, or part of the first vibration transmission sheet 113 may be located within the housing cavity 100, part of the mounting hole 1111 and part of the core housing 111. As shown in Figure 1, the present invention illustrates, as an example, that the first vibration transmission sheet 113 is located within the housing cavity 100, thereby enabling the core housing 111 itself to reduce sound leakage from the earphone 10 based on its acoustic dipole properties. Compared to the case where the first vibration transmission sheet 113 is located in the mounting hole 1111, the earphone 10 can achieve a better sound leakage reduction effect when the first vibration transmission sheet 113 is located within the housing cavity 100.This is mainly because the area of ​​the first vibration transmission sheet 113 along the vibration direction of the energy conversion device 112 is larger than the area of ​​the connecting member 115 along the vibration direction of the energy conversion device 112. When the first vibration transmission sheet 113 is located inside the mounting hole 1111, the area of ​​the first end wall 1113 along the vibration direction of the energy conversion device 112 becomes significantly smaller. Thus, the difference in rigidity between the first end wall 1113 and the second end wall 1114 tends to become large, which is unfavorable for the two to form an acoustic dipole.

[0428] In some embodiments, the housing cavity 100 may communicate with the outside of the earphone 10 only through a first passage, which is the gap between the connecting member 115 and the wall surface of the mounting hole 1111. In other words, the core housing 111 does not have sound leakage reduction holes. In this case, the earphone 10 reduces sound leakage by canceling out the sound leakage generated by the first end wall 1113 and the second end wall 1114 in opposite phase in the far field. Note that, as shown in Figure 8, if a Helmholtz resonant cavity 200 is installed in the core module 11, the core housing 111 may have through holes that connect the housing cavity 100 and the Helmholtz resonant cavity 200, and these through holes may be formed in the inner cylinder wall 1112 and / or the second end wall 1114. In this case, the Helmholtz resonance cavity 200 communicates with the housing cavity 100 only through the aforementioned through-hole and does not communicate with the outside of the earphone 10 through any other passage. Therefore, the housing cavity 100 can be considered to communicate with the outside of the earphone 10 only through the first passage.

[0429] In some other embodiments, such as in which an acoustic filter 300 is installed in the core module 11, as shown in Figure 9, the housing cavity 100 communicates with the outside of the earphone 10 only through a first passage, which is the gap between the connecting member 115 and the wall surface of the mounting hole 1111, and a second passage that communicates with the outside of the earphone 10 via the acoustic filter 300. In this case, in addition to the mounting hole 1111, the core housing 111 is provided with a through hole that connects the housing cavity 100 and the acoustic filter 300, but this through hole serves a different role from a sound leakage reduction hole, and the two should not be confused.

[0430] In some other embodiments, the housing cavity 100 may communicate with the outside of the earphone 10 only through a first passage, which is the gap between the connecting member 115 and the wall surface of the mounting hole 1111, and a second passage, the ratio of the opening area of ​​the second passage to the opening area of ​​the first passage being 10% or less. The second passage may be used as a sound leakage reduction hole to further adjust or optimize sound leakage of the earphone 10, in addition to reducing sound leakage with an acoustic dipole. In this case, the core housing 111 itself can reduce sound leakage of the earphone 10 based on an acoustic dipole, making the sound leakage of the earphone 10 more tolerable to the user. Therefore, the opening area of ​​the second passage is also significantly smaller than the opening area of ​​a sound leakage reduction hole formed solely by sound leakage reduction by perforation in related technologies, which is advantageous in meeting the waterproof and dustproof needs of the earphone 10. Naturally, the aforementioned second passage does not have to be used as an acoustic hole such as a sound leakage reduction hole, but may also be used as an external appearance hole. For example, in an embodiment in which the earphone 10 includes two core modules 11, a microphone is installed in one core module 11 and a microphone hole is installed in its core housing 111, while the other core module 11 does not have a microphone installed but an external appearance hole corresponding to the aforementioned microphone hole is installed in its core housing 111, or the aforementioned second passage may simply be a through hole formed in the core housing 111 with no other purpose.

[0431] Furthermore, compared to the core module 11 directly contacting the user's skin via the core housing 111, better adhesion can be obtained by having the core module 11 contact the user's skin via the vibration panel 114. This is because the first vibration transmission sheet 113 has a certain elasticity, and the energy conversion device 112, vibration panel 114, etc. are suspended within the housing cavity 100 via the first vibration transmission sheet 113. When worn, the first vibration transmission sheet 113 allows the vibration panel 114 to deflect at a certain angle relative to the core housing 111 according to the contour of the skin when it contacts the user's skin, thereby allowing the vibration panel 114 to adhere more tightly to the user's skin. In this way, the vibration panel 114 reduces the loss of transmission of mechanical vibrations of the energy conversion device 112 to a medium such as the user's skull, and is also advantageous in enhancing bone conduction sound. Furthermore, even during the process in which the vibration panel 114 vibrates in conjunction with the energy conversion device 112, it also vibrates the air outside the earphone 10. Since the phases of the opposing sides are opposite, they cancel each other out in the far field, further reducing sound leakage from the earphone 10.

[0432] Generally, the resonant frequency f of a structure, its stiffness K, and its mass m satisfy the relationship f∝(K / m). Stiffness may also be called the elastic modulus or spring constant. Clearly, for the same mass, the greater the stiffness of a structure, the higher its resonant frequency. In addition, greater stiffness reduces the number of higher-order modes when the structure vibrates, which is advantageous for improving sound quality. The stiffness K of a structure is related to factors such as its material (specifically, Young's modulus E) and its specific structural form. Generally, the stiffness K of a structure, its Young's modulus E, its thickness t, and its area S satisfy the relationship K∝(E·t) / S. Clearly, the smaller the area S of the structure, the greater the stiffness K, and the larger the thickness t, the greater the stiffness K. Therefore, one or a combination of methods such as increasing the Young's modulus E of the material, increasing the thickness t of the structure, or decreasing the area S of the structure is advantageous for increasing the stiffness K of the structure, and further advantageous for increasing the resonant frequency of the structure and reducing the higher-order modes when the structure vibrates. Based on this, the Young's modulus of the first end wall 1113 and the second end wall 1114 may each be 2000 MPa or more, preferably 3000 MPa or more, and / or the thickness of the first end wall 1113 and the second end wall 1114 may each be 0.3 mm to 3 mm, preferably 0.5 mm to 2.5 mm, and / or the area of ​​the first end wall 1113 and the second end wall 1114 may each be 200 mm so as to sufficiently increase the rigidity of both. 2 ~500mm 2 Preferably, 300 mm 2 ~400mm 2This is also possible. In this way, the higher-order modes when the first end wall 1113 and the second end wall 1114 vibrate can be minimized, and the resonant frequencies of the sound leakage generated by each can be offset to the highest possible frequency band, for example, 4kHz or higher, so that the user is not sensitive to sound leakage. Furthermore, the difference between the stiffness of the first end wall 1113 and the stiffness of the second end wall 1114 can be small, so that the resonant frequencies of the sound leakage generated by the first end wall 1113 and the second end wall 1114 can be made as close as possible, and furthermore, the two cancel each other out in opposite phase in the far field, reducing sound leakage from the earphone 10. Similarly, the Young's modulus of the vibration panel 114 may be 3000 MPa or more, preferably 4000 MPa or more, and / or the thickness of the vibration panel 114 may be 0.3 mm to 3 mm, preferably 0.5 mm to 2.5 mm, and / or the area of ​​the vibration panel 114 may be 130 mm, in order to sufficiently increase the rigidity of the vibration panel 114 and to minimize higher-order modes when the vibration panel 114 vibrates. 2 ~400mm 2 Preferably, 140 mm 2 ~300mm 2 That's fine.

[0433] For example, when viewed from the vibration direction of the energy conversion device 112, the ratio of the area of ​​the mounting hole 1111 to the area of ​​the first end wall 1113 is 0.6 or less, preferably 0.5 or less. In this way, when the mounting hole 1111 satisfies the mounting needs of the connecting member 115, the rigidity of the first end wall 1113 and the rigidity of the second end wall 1114 become as close as possible, thereby making the resonant frequencies of sound leakage generated by the first end wall 1113 and the second end wall 1114 as close as possible. Furthermore, when viewed from the vibration direction of the energy conversion device 112, the ratio of the difference between the area of ​​the mounting hole 1111 and the area of ​​the connecting member 115 to the area of ​​the mounting hole 1111 is greater than 0 and 0.5 or less, preferably greater than 0 and 0.4 or less. Thus, when the mounting hole 1111 allows the connecting member 115 and the vibration panel 114 to move relative to the core housing 111, the gap between the connecting member 115 and the first end wall 1113 becomes as small as possible, preventing excessive transmission of sound waves generated by the vibration of the energy conversion device 112 through the mounting hole 1111 to the outside of the earphone 10, thereby preventing sound leakage. In other words, it suppresses the cavity sound effect and further reduces sound leakage from the earphone 10. Naturally, the phase of the sound waves transmitted to the outside of the earphone 10 through the mounting hole 1111 may be opposite to the phase of one of the sound leaks generated by the first end wall 1113 and the second end wall 1114, respectively. Therefore, the sound waves transmitted to the outside of the earphone 10 through the mounting hole 1111 can further adjust the cancellation of the sound leaks generated by the first end wall 1113 and the second end wall 1114 due to their opposite phases in the far field, further reducing sound leakage from the earphone 10.

[0434] For example, the opening shape of the mounting hole 1111 and the cross-sectional shape of the connecting member 115 may be the same regular shape. For instance, the opening shape of the mounting hole 1111 and the cross-sectional shape of the connecting member 115 may be corresponding regular polygons, that is, if the cross-sectional shape of the connecting member 115 is a square, a regular hexagon, etc., then the opening shape of the mounting hole 1111 may also be a square, a regular hexagon, etc. Alternatively, the opening shape of the mounting hole 1111 and the cross-sectional shape of the connecting member 115 may be corresponding circles, ellipses, etc. Furthermore, the gap between the connecting member 115 and the first end wall 1113 (specifically, the wall surface of the mounting hole 1111) may be greater than 0 and 2 mm or less, preferably greater than 0 and 1 mm or less, and more preferably 0.1 mm or more and 1 mm or less, so as to minimize the gap between the connecting member 115 and the first end wall 1113 when the mounting hole 1111 allows the connecting member 115 and the vibration panel 114 to move relative to the core housing 111. If there are multiple mounting holes 1111 and multiple connecting members 115, and they correspond one-to-one, for example, as shown in Figures 2(b) and (c), the gap between the connecting member 115 and the wall surface of the mounting hole 1111 may be defined as the sum of the gaps that multiple connecting members 115 each form with the wall surface of the corresponding mounting hole 1111. Naturally, in some other embodiments, the opening shape of the mounting hole 1111 and the cross-sectional shape of the connecting member 115 may be different regular shapes. For example, if the cross-sectional shape of the connecting member 115 is a regular polygon such as a square or a regular hexagon, the opening shape of the mounting hole 1111 may be circular. Conversely, if the cross-sectional shape of the connecting member 115 is circular, the opening shape of the mounting hole 1111 may be a regular polygon such as a square or a regular hexagon. In some other embodiments, the opening shape of the mounting hole 1111 and the cross-sectional shape of the connecting member 115 may be other irregular structural shapes. As shown in Figure 2, the present application exemplifies the case where the cross-sectional shape of the connecting member 115 is circular, and accordingly, the opening shape of the mounting hole 1111 is also circular.

[0435] In some embodiments, for example in Figure 2(a), the number of connecting members 115 may be one, and the connecting member 115 may be connected to the central region of the vibration panel 114. In this case, the number of mounting holes 1111 may be one, and the connecting member 115 is drilled within the mounting hole 1111. In this way, under the same conditions, the area of ​​communication between the mounting hole 1111 and the outside of the core housing 111 can be minimized, and furthermore, the transmission of sound waves generated by the vibration of the energy conversion device 112 through the mounting hole 1111 to the outside of the earphone 10 and the resulting sound leakage can be minimized.

[0436] In some other embodiments, for example in Figure 2(b), the number of connecting members 115 may be multiple, for example, three, four, etc., and the multiple connecting members 115 are installed at intervals around a center line parallel to the vibration direction of the energy converter 112 of the vibrating panel 114 (for example, shown as O in Figure 2(b)). In this case, the number of mounting holes 1111 may be multiple, and each of the multiple connecting members 115 is connected to the energy converter 112 via a corresponding mounting hole 1111. This is advantageous in improving the reliability of the connection between the connecting members 115 and the vibrating panel 114 and the energy converter 112. Furthermore, the centers of the multiple connecting members 115 may be located on the same circle (i.e., concircle), and the center of the circle (for example, shown as O in Figure 2(b)) may be located on a center line parallel to the vibration direction of the energy converter 112 of the vibrating panel 114. The multiple connecting members 115 may be installed at uniform intervals around a center line parallel to the vibration direction of the energy conversion device 112 of the vibration panel 114.

[0437] In some other embodiments, for example in Figure 2(c), the number of connecting members 115 may be multiple, for example, four or five, with one of the connecting members 115 connected to the central region of the vibration panel 114, and the remaining connecting members 115 installed at intervals around the connecting member 115 located in the central region of the vibration panel 114. In this case, the number of mounting holes 1111 may be multiple, and each of the multiple connecting members 115 is connected to the energy converter 112 via a corresponding mounting hole 1111. This is similarly advantageous in improving the reliability of the connecting members 115 connecting the vibration panel 114 and the energy converter 112.

[0438] In addition, compared to Figure 1, Figure 2 can be easily considered as an orthographic projection of the vibration panel 114 and connecting member 115 along the vibration direction of the energy conversion device 112.

[0439] In some embodiments, the housing cavity 100 communicates with the outside of the earphone 10 through a passage, which is a gap between the connecting member 115 and the wall surface of the mounting hole 1111. In this case, the core module 11 may include a sealing membrane 118, which seals the aforementioned passage, i.e., the gap between the connecting member 115 and the wall surface of the mounting hole 1111 may be sealed by the sealing membrane 118, thereby preventing sound waves conducted by the air formed in the housing cavity 100 from propagating to the outside of the earphone 10 through the aforementioned passage and causing sound leakage. The material of the sealing membrane 118 may be rubber, silicone rubber, polyvinyl chloride (PVC), polycarbonate (PC), or poly(ether-ether-ketone) (PEEK).

[0440] For example, as shown in Figure 35, the sealing membrane 118 may include a first connecting portion 1181, a wrinkled portion 1182, and a second connecting portion 1183 that are integrally connected, with the wrinkled portion 1182 forming a recessed region between the first connecting portion 1181 and the second connecting portion 1182. In this case, the first connecting portion 1181 may be connected to the first end wall 1113, and the second connecting portion 1183 may be connected to the connecting member 115 or the vibration panel 114. Thus, compared to a planar thin film structure (for example, a non-planar thin film structure where the aforementioned recessed region is located is planar), such a wrinkled non-planar thin film structure is advantageous in increasing the elasticity of the sealing film 118. This is advantageous in preventing excessive transmission of mechanical vibrations generated in the energy conversion device 112 to the core housing 111 via the sealing film 118, and also in preventing the sealing film 118 from being "torn" due to excessive relative movement between the connecting member 115 or vibration panel 114 and the core housing 111, or from being "damaged" due to excessively high or low sound pressure in the housing cavity 100, or from fatigue failure of the sealing film 118 due to excessive changes in sound pressure in the housing cavity 100. In addition, the core housing 111 may be provided with a pressure reduction hole, which balances the sound pressure in the housing cavity 100 and maintains it at a level that does not change significantly with respect to atmospheric pressure, thereby extending the service life of the sealing film 118. The area of ​​the decompression port is 4 mm². 2 The following is also possible. Installing the sealing membrane 118 is advantageous in increasing the gap between the connecting member 115 and the wall surface of the mounting hole 1111. That is, the opening area of ​​the mounting hole 1111 may be set to be larger than the cross-sectional area of ​​the connecting member 115, thereby avoiding unnecessary wear between the connecting member 115 and the core housing 111, and further advantageous in extending the service life of the core module 11.

[0441] Furthermore, as shown in Figures 46 and 35, the sealing membrane 118 may be connected only to the first end wall 1113, meaning that a gap may remain between the sealing membrane 118 and the connecting member 115. However, this gap is smaller than the gap between the connecting member 115 and the wall surface of the mounting hole 1111. This not only reduces the area of ​​communication between the housing cavity 100 and the outside of the earphone 10, but is also advantageous in balancing the sound pressure inside the housing cavity 100 and maintaining it at a level that does not change significantly with respect to atmospheric pressure.

[0442] Based on the above related explanation, in the process in which the energy conversion device 112 generates mechanical vibrations, the core housing 111 (specifically, the first end wall 1113 and the second end wall 1114) and the vibration panel 114 can further form multiple sets of acoustic dipoles, that is, two acoustic dipoles with opposite phases cancel each other out, further reducing sound leakage from the earphone 10. Based on this, the ratio of the absolute value of the difference between the stiffness of the vibration panel 114 and the stiffness of the first end wall 1113 to the larger of the stiffness of the vibration panel 114 and the stiffness of the first end wall 1113 is 0 to 0.4, preferably 0 to 0.3, and / or the ratio of the absolute value of the difference between the stiffness of the vibration panel 114 and the stiffness of the second end wall 1114 to the larger of the stiffness of the vibration panel 114 and the stiffness of the second end wall 1114 is 0 to 0.4, preferably 0 to 0.3. In this way, the resonant frequency of sound leakage generated by the vibrating panel 114 and the resonant frequency of sound leakage generated by the first end wall 1113 and / or the second end wall 1114 are made as close as possible, thereby better canceling each other out of phase in the far field, and further reducing sound leakage from the earphone 10.

[0443] For example, when viewed from the vibration direction of the energy conversion device 112, the ratio of the area of ​​the vibration panel 114 to the area of ​​the first end wall 1113 is 0.3 to 1.6, and preferably 0.5 to 1.2. In other words, after the structure of the core housing 111 is determined, the difference between the area of ​​the vibration panel 114 and the area of ​​the first end wall 1113 does not need to be large, so that the rigidity of the vibration panel 114 and the rigidity of the first end wall 1113 are as close as possible. In addition, if the area of ​​the vibration panel 114 is too small, it may affect the vibration panel 114's ability to transmit mechanical vibrations generated by the energy conversion device 112, and may also affect the intensity of bone conduction sound generated by the earphones 10. Furthermore, if the contact surface between the user's skin and the core module 11 is too small, it may cause poor fit and may also affect the comfort of wearing the earphones 10. If the area of ​​the vibration panel 114 is too large, it may affect the rigidity of the vibration panel 114 and may also affect the sound quality of the earphones 10. Furthermore, the vibration panel 114 may be too greatly affected by the contours of the skin, making it difficult to adhere closely to the user's skin and potentially affecting the intensity of bone conduction sound generated by the earphones 10.

[0444] Generally, for an acoustic dipole, the smaller the distance between two monopoles with opposite phases, the more pronounced the phase cancellation effect becomes, meaning the far-field sound pressure decreases, and consequently, the far-field sound leakage for the earphone 10 is also reduced. Naturally, considering the structural strength of the vibration panel 114, the structural interference between the vibration panel 114 and the core housing 111 during the vibration process of the energy conversion device 112, and the spatial needs for installing structural members such as the energy conversion device 112 within the core housing 111, it is difficult to make the distance between the two monopoles zero. Therefore, in the vibration direction of the energy conversion device 112, the thickness of the vibration panel 114 is 0.3 mm to 3 mm, preferably 0.5 mm to 2.5 mm, and if the thickness is too small, it is disadvantageous for the vibration panel 114 to have sufficient rigidity, and / or the gap between the vibration panel 114 and the first end wall 1113 is 0.5 mm to 3 mm, preferably 1 mm to 2 mm, and if the gap is too small, the vibration panel 114 is likely to collide with the core housing 111 and cause sound distortion, and / or the distance between the side of the first end wall 1113 away from the second end wall 1114 and the side of the second end wall 1114 away from the first end wall 1113 may be 6 mm to 16 mm.

[0445] As shown in Figure 3, the core module 11 may further include a surrounding member 116 connected to one end of the core housing 111 adjacent to the vibration panel 114. For example, the surrounding member 116 may be connected to one end of the inner cylinder wall 1112 away from the second end wall 1114, or it may be connected to the first end wall 1113, and the surrounding member 116 can surround the vibration panel 114 so that it does not fall out. In other words, the surrounding member 116 is connected to the core housing 111, and the projection of the surrounding member 116 into a reference plane perpendicular to the vibration direction of the energy conversion device 112 surrounds the outer periphery of the projection of the vibration panel 114 into the aforementioned reference plane. When not being worn, the surrounding member 116 is positioned at a distance from the vibration panel 114 in a direction perpendicular to the vibration direction of the energy conversion device 112, so as not to obstruct the vibration of the vibration panel 114 in conjunction with the energy conversion device 112. Furthermore, at least a portion of the side of the vibration panel 114 away from the energy conversion device 112 protrudes from the side of the surrounding member 116 away from the energy conversion device 112 in the vibration direction of the energy conversion device 112, thereby allowing the vibration panel 114 to come into close contact with the user's skin and further increasing the intensity of bone conduction sound generated by the earphone 10. Furthermore, in the worn state, in addition to the vibration panel 114 contacting the user's skin, the surrounding member 116 may also contact the user's skin. That is, at least a portion of the surrounding member 116 may contact the user's skin together with the vibration panel 114, sharing a portion of the pressing force that the core module 11 applies to the user's skin. This causes the vibration panel 114 to vibrate in conjunction with the energy conversion device 112, further improving the sound quality of the earphones 10, especially in the low-frequency range. In other words, installing the surrounding member 116 on the core module 11 is advantageous for achieving both wearing stability and comfort and sound quality. Therefore, the pressing force of the vibration panel 114 against the user's cheek may be smaller than the pressing force of the head beam assembly 12 (described later) pressing the core module 11 against the user's cheek, and the contact area between the vibration panel 114 and the user's cheek may be smaller than the contact area between the core module 11 and the user's cheek.If a surrounding member 116 is installed on the core module 11, the pressing force with which the core module 11 is pressed against the user's cheek may be equal to the sum of the pressing force of the vibrating panel 114 against the user's cheek and the pressing force of the surrounding member 116 against the user's cheek, and the contact area between the core module 11 and the user's cheek may be equal to the sum of the contact area between the vibrating panel 114 and the user's cheek and the contact area between the surrounding member 116 and the user's cheek. If a surrounding member 116 is not installed on the core module 11 and it contacts the user's cheek only through the vibrating panel 114, the pressing force with which the core module 11 is pressed against the user's cheek may be equal to the pressing force of the vibrating panel 114 against the user's cheek, and the contact area between the core module 11 and the user's cheek may be equal to the contact area between the vibrating panel 114 and the user's cheek. Based on this, the head beam assembly 12, described later, can apply a pressing force of 0.4N to 0.8N to press the core module 11 against the user's cheek, the pressing force of the vibration panel 114 against the user's cheek may be 0.1N to 0.7N, and the contact area between the core module 11 and the user's cheek is 400 mm. 2 ~600mm 2 Preferably, 450 mm 2 ~550mm 2 Even if this is the case, the contact area between the vibration panel 114 and the user's cheek is 180 mm². 2 ~300mm 2 Preferably, 160 mm 2 ~280mm 2 That's fine.

[0446] Furthermore, the side of the core housing 111 adjacent to the vibration panel 114, the vibration panel 114, and the surrounding member 116 may be formed to surround the cavity 400. For example, the surrounding member 116 may be formed to surround the cavity 400 together with the first end wall 1113 and the vibration panel 114, and the surrounding member 116 may be provided with a communication hole 1161 that connects the cavity 400 to the outside of the core module 11, thereby allowing the cavity 400 to communicate with the outside of the core module 11 via the communication hole 1161 when installed. In other words, the enclosure member 116 may be provided with a communication hole 1161 that connects the gap between the vibration panel 114 and the core housing 111 (for example, the first end wall 1113) to the outside of the earphone 10. This allows the sound leakage generated by the first end wall 1113 and the sound leakage generated by the second end wall 1114 to cancel each other out in the far field in opposite phase. That is, the sound leakage generated by the opposing sides of the core housing 111 cancels each other out in the far field in opposite phase, better meeting the need for reducing sound leakage from the earphone 10. The number of communication holes 1161 may be multiple. For example, multiple communication holes 1161 may be spaced apart around the connecting member 115. Also, for example, the opening ratio in the surrounding member 116 of the communication holes 1161 is 30% or more so that sound leakage generated by the first end wall 1113 is more widely transmitted and cancels out in opposite phase at the far field with sound leakage generated by the second end wall 1114. The aforementioned opening ratio may also be obtained by dividing the product of the area of ​​a single communication hole 1161 and the number of communication holes 1161 by the area of ​​the surrounding member 116. Furthermore, in the fitted state, at least some of the multiple communication holes 1161 do not come into contact with the user's skin so that sound leakage generated by the first end wall 1113 is transmitted through the communication holes 1161. Therefore, as shown in Figure 3, the communication hole 1161 may be formed on the side surface of the enclosing member 116, as shown in Figure 27 or Figure 32, the communication hole 1161 may be formed in the connecting portion 1162, the first outer cylinder wall 1115 may have a relief hole corresponding to the communication hole 1162, the communication hole 1161 may be formed in a portion of the position limiting portion 1164 that does not come into contact with the user's skin, and as shown in Figure 52, the communication hole 1161 may be formed in a portion of the enclosing member 116 that does not come into contact with the user's skin.In addition, since the cavity 400 and the communication hole 1161 can similarly form a Helmholtz resonant cavity, increasing the opening ratio in the surrounding member 116 of the communication hole 1161 is advantageous in that the resonance peak when the cavity 400 resonates is offset to a higher frequency band, thereby reducing the sound leakage perceived by the user. When worn, the opening direction of at least one of the communication holes 1161 may be away from the top of the user's head. For example, the angle between the opening direction of the communication hole 1161 and the user's vertical axis is 0 to 10° so that liquids such as the user's sweat can also flow out through the communication hole 1161, that is, to prevent sweat and other liquids from accumulating inside the core module 11. Naturally, sound leakage generated by the first end wall 1113 is transmitted through the gap between the enclosure member 116 and the vibration panel 114 in a direction perpendicular to the vibration direction of the energy conversion device 112, and may also cancel out in opposite phase in the far field with sound leakage generated by the second end wall 1114, as will be explained exemplified later.

[0447] For example, there exists a target frequency range within the frequency range of 500Hz to 4kHz that has an interval length of at least 1 / 3 octave. Based on this, the sound leakage that occurs when the earphone 10 is worn with the communication hole 1161 open within the aforementioned target frequency range is weaker than the sound leakage that occurs when the earphone 10 is worn with the communication hole 1161 closed. The aforementioned target frequency range may also be 1kHz to 2kHz. Note that the aforementioned communication hole 1161 being closed may also mean blocking the communication hole 1161.

[0448] Furthermore, the unit area per square millimeter in the enclosing member 116 may have at least one communication hole 1161, such that there are a sufficiently large number of communication holes 1161 in the enclosing member 116. However, the area of ​​a single communication hole 1161 is not particularly large, which is advantageous in ensuring the structural strength of the enclosing member 116. Naturally, in some other embodiments, such as when the structural strength of the enclosing member 116 is sufficient, the area of ​​a single communication hole 1161 may be relatively large.

[0449] In some embodiments, the enclosing member 116 may be a plastic part and may have a thickness of 0.2 mm to 1 mm. If the thickness of the enclosing member 116 is too small, it is likely to result in insufficient structural strength, and if the thickness of the enclosing member 116 is too large, the enclosing member 116 is more likely to come into contact with the user's skin before the vibrating panel 114, making it difficult for the vibrating panel 114 to come into contact with the user's skin. Naturally, in order to ensure that the vibrating panel 114 can come into contact with the user's skin, the portion of the enclosing member 116 that comes into contact with the user's skin may be thicker than other portions. For example, the thickness of the portion of the enclosing member 116 that comes into contact with the user's skin is greater than 1 mm to prevent the enclosing member 116 from being crushed when worn. Furthermore, if the enclosing member 116 is a plastic part, the aforementioned plastic part can be formed into a metal frame by an injection molding process to provide structural reinforcement to the enclosing member 116.

[0450] In some embodiments, the enclosing member 116 may be a metal component, allowing the opening ratio of the communication hole 1161 in the enclosing member 116 to be 60% or more, mainly because metal components have higher structural strength than plastic components. For example, the enclosing member 116 is a steel mesh with a mesh count (i.e., mesh holes per inch) of 5 to 508.

[0451] In some embodiments, the core housing 111 may be a first plastic component, and the surrounding member 116 may be connected to the core housing 111 via a second plastic component, the second plastic component being integrally molded with a metal component by an injection molding process, and the communication hole 1161 may be formed in the aforementioned metal component.

[0452] As shown in Figure 43 or Figure 44, the surrounding member 116 has an uneven surface on the outer surface facing the user's skin when worn, so that when the surrounding member 116 contacts the user's skin, it does not make complete contact, that is, a gap remains between the surrounding member 116 and the user's skin, and further allows communication between the cavity 400 and the outside of the core module 11. In this way, sound leakage generated by the opposing sides of the core housing 111 (for example, the first end wall 1113 and the second end wall 1114) is similarly canceled out in opposite phase in the far field, thus satisfying the need for sound leakage reduction of the earphone 10. The difference in height of the aforementioned uneven surface may be 0.5 mm to 5 mm so that there is a sufficient communication gap between the cavity 400 and the outside of the core module 11.

[0453] In some embodiments, as shown in Figure 43, grooves 1165 may be provided on the outer surface of the enclosure member 116, and in the installed state, the cavity 400 communicates with the outside of the core module 11 through the grooves 1165. Parameters such as the number and depth of the grooves 1165 affect the area of ​​communication between the cavity 400 and the outside of the core module 11. For example, the projection of the enclosure member 116 onto a reference plane perpendicular to the vibration direction of the energy conversion device 112 has mutually orthogonal long axis and short axis directions, the dimension of the enclosure member 116 in the long axis direction is greater than the dimension of the enclosure member 116 in the short axis direction, the number of grooves 1165 may be multiple, and the multiple grooves 1165 may be divided into four sets, two sets of grooves 1165 each spaced along the long axis, and the other two sets of grooves 1165 each spaced along the short axis, and the number of grooves 1165 in each set spaced along the long axis may be greater than the number of grooves 1165 in each set spaced along the short axis. For ease of distinction and explanation, the area where the grooves 1165 are located in Figure 43 is filled with a grid, that is, the area where one grid is located can be easily considered as one groove 1165. For example, the depth of the groove 1165 may be 0.5 mm to 5 mm.

[0454] In some embodiments, as shown in Figure 44, projections 1166 may be provided on the outer surface of the enclosing member 116. The projections 1166 create a gap between the enclosing member 116 and the user's skin when worn, and the cavity 400 communicates with the outside of the core module 11 through the aforementioned gap. Parameters such as the number and height of the projections 1166 similarly affect the area of ​​communication between the cavity 400 and the outside of the core module 11. For example, there may be multiple projections 1166, and multiple projections 1166 may form a grid in the aforementioned gap. For ease of distinction and explanation, the areas where the projections 1166 are located in Figure 44 are filled with a grid, i.e., an area where one grid is located can be easily considered as one projection 1166. Also, for example, the height of the projections 1166 may be 0.5 mm to 5 mm.

[0455] Similarly, within the frequency range of 500Hz to 4kHz, there exists a target frequency range with an interval length of at least 1 / 3 octave. Based on this, if there is an uneven area on the outer surface of the surrounding member 116 within the aforementioned target frequency range, the sound leakage that occurs when the earphone 10 is worn is weaker than the sound leakage that occurs when the earphone 10 is worn if there is no uneven area on the outer surface of the surrounding member 116. The aforementioned target frequency range is 1kHz to 2kHz. Note that the absence of an uneven area on the outer surface of the surrounding member 116 may also be achieved by filling in the uneven area on the outer surface of the surrounding member 116. For example, adhesive can be filled into the groove 1165 or between multiple protrusions 1166, and after the adhesive hardens, it can be easily considered that there is no uneven area on the outer surface of the surrounding member 116.

[0456] As shown in Figure 45, the surrounding member 116 has a porous structure 1167 on the side facing the user's skin when worn, so that when worn, at least a portion of the porous structure 1167 contacts the user's skin together with the vibration panel 114, allowing communication between the cavity 400 and the outside of the core module 11. In this way, sound leakage generated by the opposing sides of the core housing 111 (e.g., the first end wall 1113 and the second end wall 1114) is similarly canceled out in opposite phase in the far field, thus satisfying the need for sound leakage reduction of the earphone 10.

[0457] Furthermore, the porous structure 1167 may include a fixed layer and a porous main body layer connected to the fixed layer, and the porous structure 1167 is connected to the surrounding member 116 via the fixed layer, and the porous structure 1167 communicates the cavity 400 with the outside of the core module 11 via the porous main body layer. The porosity of the aforementioned porous main body layer may be 60% or more, and for example, the aforementioned porous main body layer may be a sponge or foam.

[0458] In some embodiments, the fixed layer of the porous structure 1167 and the surrounding member 116 may be configured to be detachably connected, and the connection method between them may be one of magnetic adsorption type, buckle type, or adhesive type. The aforementioned adhesive type can be realized by one of hook-and-loop fasteners, single-sided tape, or double-sided tape.

[0459] In some embodiments, the fixing layer of the porous structure 1167 may be a cured adhesive, i.e., the porous structure 1167 is fixed to the surrounding member 116 by the adhesive. In this case, since the porous structure 1167 is not easily replaceable, in order to extend the service life of the porous structure 1167, the porous structure 1167 may include a protective layer covering the porous main body layer of the porous structure 1167, and the porous structure 1167 comes into contact with the user's skin through the aforementioned protective layer. The aforementioned protective layer may be a woven fabric or a steel mesh.

[0460] Similarly, within the frequency range of 500Hz to 4kHz, there exists a target frequency range with an interval length of at least 1 / 3 octave. Based on this, within the aforementioned target frequency range, the sound leakage that occurs when the earphone 10 is worn, if the core module 11 has a porous structure 1167, is weaker than the sound leakage that occurs when the earphone 10 is worn, if the core module 11 does not have a porous structure 1167. The aforementioned target frequency range is 1kHz to 2kHz. Note that the absence of the porous structure 1167 in the core module 11 can also be achieved by removing the porous structure 1167 from the surrounding member 116. For example, if the porous structure 1167 is detachably connected to the surrounding member 116, the porous structure 1167 can be removed; if the porous structure 1167 is fixed to the surrounding member 116 with adhesive, the porous structure 1167 can be scraped off with a cutter.

[0461] In embodiments in which the surrounding member 116 is provided with grooves 1165, protrusions 1166, and a porous structure 1167, the surrounding member 116 may also be provided with communication holes 1161 that connect the cavity 400 to the outside of the core module 11, thereby allowing the cavity 400 to communicate with the outside of the core module 11 through the communication holes 1161 when installed. The number of communication holes 1161 may be multiple, and the opening ratio of the communication holes 1161 in the surrounding member 116 may be 30% or more.

[0462] As shown in Figure 4, a gasket 117 may be further installed between the vibration panel 114 and the first end wall 1113, wherein the Rockwell hardness of the gasket 117 is less than that of the first vibration transmission sheet 113. In other words, the gasket 117 may be called a soft gasket in comparison to the first vibration transmission sheet 113. This prevents mechanical vibrations generated in the energy conversion device 112 from being transmitted to the core housing 111 via the gasket 117, and further reduces sound leakage from the earphone 10. The gasket 117 may have adhesive properties to connect the vibration panel 114 and the first end wall 1113, for example, a foam adhesive, which can also prevent the vibration panel 114 from falling off.

[0463] Furthermore, the inventors of this application have discovered the following through long-term research: Adding a surrounding member 116 to the core module 11 is advantageous for offsetting sound leakage to the mid-to-high frequency band, and adding a gasket 117 to the core module 11 is advantageous for offsetting sound leakage to the mid-to-low frequency band; both are advantageous for improving sound leakage. In addition, in this application, the frequency range corresponding to the low frequency band may be 20 to 150 Hz, the frequency range corresponding to the mid frequency band may be 150 to 5 kHz, and the frequency range corresponding to the high frequency band may be 5 kHz to 20 kHz. The frequency range corresponding to the mid-to-low frequency band may be 150 to 500 Hz, and the frequency range corresponding to the mid-to-high frequency band may be 500 to 5 kHz.

[0464] As shown in Figures 5 to 7, the side of the vibration panel 114 away from the energy conversion device 112 may include a skin contact area 1141 that contacts the user's skin and an air conduction enhancement area 1142 that at least part does not contact the user's skin. The vibration panel 114 may also form sound waves by vibrating the air outside the earphone 10 through the air conduction enhancement area 1142. In other words, the core module 11 generates bone conduction sound via the vibration panel 114 and air conduction sound, and by having the same phase as both, it allows the air conduction sound to enhance the bone conduction sound, further improving the sound quality of the earphone 10. The air conduction enhancement region 1142 is at least partially inclined with respect to the skin contact region 1141 and extends toward the energy conversion device 112, with an inclination angle with respect to the skin contact region 1141 (e.g., shown as θ in Figures 5 and 6) of 0 to 75°, preferably 0 to 60°, and / or the width of the orthographic projection of the air conduction enhancement region 1142 along the vibration direction of the energy conversion device 112 (e.g., shown as W in Figures 5 to 7) of 1 mm or more, preferably 2 mm or more. In this way, the size of the air conduction enhancement region 1142 is increased, further enhancing the enhancement effect of air-conducted sound against bone-conducted sound. Furthermore, the air conduction enhancement region 1142 may be configured as a curved surface (e.g., shown in Figure 5) or as a flat surface (e.g., shown in Figure 6).

[0465] In some embodiments, for example, as shown in Figure 5, the air conduction enhancement regions 1142 may all be inclined with respect to the skin contact regions 1141 and extend toward the energy conversion device 112.

[0466] In some other embodiments, for example as shown in Figure 6, the air conduction enhancement region 1142 is partially inclined with respect to the skin contact region 1141 (i.e., θ≠0) and extends toward the energy converter 112, while the other part is spaced apart from the skin contact region 1141 in the vibration direction of the energy converter 112, for example, parallel to the skin contact region 1141 (i.e., θ=0). Furthermore, as shown in Figure 27, if a surrounding member 116 is installed in the core housing 111, the surrounding member 116 may partially overlap with the air conduction enhancement region 1142 and offset from the skin contact region 1141, as viewed from the vibration direction of the energy converter 112, in order to allow the vibration panel 114 to be stopped in the vibration direction of the energy converter 112.

[0467] In some other embodiments, for example as shown in Figure 7, when worn, the air conduction enhancement region 1142 is directed at least partly toward the entrance of the ear canal of the user's ear, thereby allowing sound waves generated by the vibration panel 114 to be directed toward the entrance of the ear canal and further enhancing the enhancement effect of air conduction sound against bone conduction sound. Exemplarily, the vibration panel 114 has a long axis and a short axis perpendicular to the vibration direction of the energy conversion device 112 and orthogonal to each other, and the dimension of the vibration panel 114 in the aforementioned long axis is larger than the dimension of the vibration panel 114 in the aforementioned short axis, for example, when viewed from the vibration direction, the vibration panel 114 is installed in an elliptical, rounded rectangle or racetrack shape. When worn, the aforementioned long axis is directed toward the top of the user's head, and the aforementioned short axis is directed toward the entrance of the ear canal of the user's ear. In this way, the core module 11 can be positioned closer to the ear canal overall when worn, and the core module 11 can transmit mechanical vibrations generated by the energy conversion device 112 via bone conduction, and can also vibrate more air in the ear canal as a result (i.e., generate airborne sound), and further increase the volume of sound audible to the user.

[0468] As shown in Figures 8 to 10, the core module 11 may be equipped with an acoustic cavity that communicates with the housing cavity 100, and the acoustic cavity absorbs the acoustic energy of sound waves generated by the vibration of the energy conversion device 112 as the air inside the housing cavity 100 vibrates. The aforementioned sound waves can be output to the outside of the earphone 10 through the mounting hole 1111 to form airborne sound.

[0469] In some embodiments, for example as shown in Figure 8, the frequency response curve of the sound wave has a resonance peak, and the acoustic cavity may be a Helmholtz resonance cavity 200, thereby weakening the intensity of the aforementioned resonance peak (specifically, it may be the peak resonance intensity), that is, suppressing a sharp increase in the peak resonance intensity and making the sound quality of the earphone 10 more balanced. The peak resonance frequency of the aforementioned resonance peak is 500 Hz to 4 kHz, preferably 1 kHz to 2 kHz. Exemplarily, the Helmholtz resonance cavity 200 may be installed on the side of the core housing 111, for example, the second end wall 1114 away from the energy conversion device 112, and / or the Helmholtz resonance cavity 200 may be installed in the energy conversion device 112 (e.g., its magnetic circuit system). Naturally, in some other embodiments, such as emphasizing a certain frequency point or frequency band, the Helmholtz resonant cavity 200 may be configured to reduce the vibration intensity within a predetermined frequency band of the aforementioned air-conducted sound frequency response curve, and the predetermined frequency band does not have to cover the aforementioned resonance peak. The difference between the intensity of the aforementioned resonance peak when the opening connecting the Helmholtz resonant cavity 200 and the housing cavity 100 is open and the intensity of the aforementioned resonance peak when the opening connecting the Helmholtz resonant cavity 200 and the housing cavity 100 is closed may be 3 dB or more, and the corresponding frequency response curve may be measured under the condition that the excitation voltage is 1 V.

[0470] In some other embodiments, for example as shown in Figures 9 and 10, the acoustic cavity may be an acoustic filter 300, and the cutoff frequency of the acoustic filter 300 may be 5 kHz or less, preferably 4 kHz or less, so as to attenuate acoustic energy in frequency bands where the frequency is greater than the aforementioned cutoff frequency. Exemplarily, as shown in Figure 9, the acoustic filter 300 may be located on the side of the energy conversion device 112 away from the vibration panel 114, i.e., it is a rear acoustic filter. As shown in Figure 10, the acoustic filter 300 may be located on the side of the energy conversion device 112 facing the vibration panel 114, i.e., it is a front acoustic filter. For example, the first end wall 1113 may include a first sub-end wall 11131 and a second sub-end wall 11132 that are spaced apart in the vibration direction of the energy conversion device 112, and the mounting hole 1111 penetrates the first sub-end wall 11131 and the second sub-end wall 11132 along the vibration direction of the energy conversion device 112, and the first sub-end wall 11131 and the second sub-end wall 11132 cooperate with the inner cylinder wall 1112 to form an acoustic filter 300. The gap between the first sub-end wall 11131 and the second sub-end wall 11132 in the vibration direction of the energy conversion device 112 is 0.5 mm to 5 mm, preferably 1 mm to 3 mm.

[0471] As shown in Figure 11, the energy conversion device 112 may include a bracket 1121, a second vibration transmission sheet 1122, a magnetic circuit system, and a coil 1123, wherein the bracket 1121 is connected to the core housing 111 via a first vibration transmission sheet 113, the second vibration transmission sheet 1122 connects the bracket 1121 and the magnetic circuit system so that the magnetic circuit system is suspended within the housing cavity 100, and the coil 1123 is connected to the bracket 1121 and inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy conversion device 112. In this case, the vibration panel 114 may be connected to the bracket 1121 via a connecting member 115. Exemplarily, the first vibration transmission sheet 113 may have its peripheral region connected to the core housing 111 and its central region connected to the bracket 1121, and the second vibration transmission sheet 1122 may have its peripheral region connected to the bracket 1121 and its central region connected to the magnetic circuit system. Naturally, in some other embodiments, the second vibration transmission sheet 1122 may have its peripheral region connected to a magnetic circuit system and its central region connected to a bracket 1121. In this case, the magnetic circuit system may be connected to the peripheral region of the second vibration transmission sheet 1122 via a cylindrical connecting member. The aforementioned magnetic circuit system may include a permeable cover 1124 and magnets 1125 connected to the bottom of the permeable cover 1124, the number of magnets 1125 may be one or at least two as needed, the magnets 1125 may be connected to the central region of the second vibration transmission sheet 1122 and may be spaced apart from the permeable cover 1124 in a direction perpendicular to the vibration direction of the energy conversion device 112 to form the aforementioned magnetic gap, and the coil 1123 is inserted between the magnets 1125 and the permeable cover 1124. In some embodiments, such as when an annular magnet surrounding the magnet 1125 is installed inside the permeable cover 1124, the magnetic gap is specifically formed between the annular magnet and the magnet 1125. However, since the magnetic gap is still located between the permeable cover 1124 and the magnet 1125, it can still be considered that the magnet 1125 and the permeable cover 1124 are still installed with a gap between them in a direction perpendicular to the vibration direction of the energy conversion device 112.

[0472] In some embodiments, as shown in Figures 27 and 28, the first vibration transmission sheet 113 may have its central region fitted into the bracket 1121 and its peripheral region pressed against the inner cylindrical wall 1112 by the first end wall 1113; the second vibration transmission sheet 1122 may have its central region fitted into the bracket 1121, be further away from the vibration panel 114 than the first vibration transmission sheet 113, and be fixed to a cylindrical connecting member; the side wall of the permeable cover 1124 of the magnetic circuit system may be connected to the aforementioned cylindrical connecting member so that the magnetic circuit system is connected to the bracket 1121 via the second vibration transmission sheet 1122; the coil 1123 is connected to the side of the bracket 1121 away from the first vibration transmission sheet 113 and the second vibration transmission sheet 1122 and is inserted into the magnetic gap between the permeable cover 1124 and the magnet 1125. In this case, since the side wall of the permeable cover 1124 is connected to the second vibration transmission sheet 1122 via a cylindrical connecting member, a cavity is formed inside the energy conversion device 112. Assuming no other structural improvements are made, this cavity communicates with the housing cavity 100 only through the perforated area of ​​the second vibration transmission sheet 1122, causing the energy conversion device 112 to generate a serious cavity noise effect during the vibration process, and further generating significant sound leakage.

[0473] In some embodiments, as shown in Figures 46 and 11, a bracket 1121 is connected to the core housing 111 via a first vibration transmission sheet 113, a second vibration transmission sheet 1122 is connected to the first vibration transmission sheet 113 via a bracket 1121, and the magnetic circuit system may be connected to the central region of the second vibration transmission sheet 1122 so that the magnetic circuit system is suspended within the housing cavity, and the coil 1123 is inserted into the magnetic gap of the magnetic circuit system along the vibration direction of the energy converter 112. The aforementioned magnetic gap surrounds the location where the magnetic circuit system is connected to the second vibration transmission sheet 1122. Thus, since the magnetic circuit system is connected to the central region of the second vibration transmission sheet 1122, there is no need for a cylindrical connecting member to be installed in the magnetic circuit system that is connected to the peripheral region of the second vibration transmission sheet 1122. In other words, the cylindrical connecting member is canceled, allowing the inside and outside of the energy conversion device 112 to have a larger communication area. This is advantageous in suppressing the cavity sound effect and further improving sound leakage from the earphone 10. For example, since the magnet 1125 of the magnetic circuit system is connected to the central region of the second vibration transmission sheet 1122, the side wall of the permeable cover 1124 is installed at a distance from the second vibration transmission sheet 1122 in the vibration direction of the energy conversion device 112, forming a passage that communicates the aforementioned magnetic gap with the outside of the magnetic circuit system, and further increasing the area in which the inside and outside of the energy conversion device 112 communicate.

[0474] For example, as shown in Figures 47 and 46, the bracket 1121 may include a first bracket 11212 and a second bracket 11213, the first bracket 11212 being connected to the central region of the first vibration transmission sheet 113, and the second bracket 11213 being connected to the peripheral region of the second vibration transmission sheet 1122. Accordingly, the second bracket 11213 and the vibration panel 114 may each be connected to the first bracket 11212, and the coil 1123 may be connected to the second bracket 11213. In this case, since the connection position between the coil 1123 and the second bracket 11213 corresponds to the peripheral region of the second vibration transmission sheet 1122, the magnetic gap can surround the central region to which the magnetic circuit system is connected to the second vibration transmission sheet 1122. The first bracket 11212 and the first vibration transmission sheet 113 may be integrally molded by a metal insert injection molding process, and the second bracket 11213 and the second vibration transmission sheet 1122 may similarly be integrally molded by a metal insert injection molding process. Accordingly, an insertion hole may be provided in one of the first bracket 11212 and the second bracket 11213, and an insertion column fitted into the insertion hole may be provided in the other, the insertion column being inserted into the insertion hole so as to connect the first bracket 11212 and the second bracket 11213. In this embodiment, an insertion hole 11215 and an insertion column 11216 are provided in the first bracket 11212 and the second bracket 11213, respectively, as an example.

[0475] Furthermore, the energy conversion device 112 may include a suspension 11214, which is connected to the central region of the second vibration transmission sheet 1122, and a second bracket 11213 located on the outer periphery of the suspension 11214 and spaced apart from the suspension 11214 in a direction perpendicular to the vibration direction of the energy conversion device 112, and the magnet 1125 of the magnetic circuit system may be connected to the suspension 11214. In this way, the magnetic gap between the permeable cover 1124 and the magnet 1125 surrounds the central region to which the magnet 1125 is connected to the second vibration transmission sheet 1122.

[0476] Furthermore, the magnet 1125 may be a permanent magnet and may include a first magnetic member 11251, a permeable member 11252, and a second magnetic member 11253 that are stacked and installed along the vibration direction of the energy conversion device 112. The second magnetic member 11253 is closer to the second vibration transmission sheet 1122 than the first magnetic member 11251, for example, the first magnetic member 11251 is connected to the bottom of the permeable cover 1124. The magnetization directions of the first magnetic member 11251 and the second magnetic member 11253 are different; for example, their magnetization directions are opposite to each other. Furthermore, when the side wall of the permeable cover 1124 is orthogonally projected onto the outer surface of the magnet 1125 along a direction perpendicular to the vibration direction of the energy conversion device 112, it overlaps with at least the permeable member 11252, thereby concentrating more of the magnetic field formed by the magnet 1125 within the aforementioned magnetic gap and reducing sound leakage. Preferably, when the coil 1123 is orthogonally projected onto the outer surface of the magnet 1125 in a direction perpendicular to the vibration direction of the energy conversion device 112, it overlaps with at least the permeable member 11252, thereby allowing more of the magnetic field formed by the magnet 1125 to pass through the coil 1123, and increasing the utilization rate of the magnetic field.

[0477] Furthermore, in the magnetic shielding cover 1124, a communication hole 11241 may be provided to connect the aforementioned magnetic gap and the external space of the magnetic circuit system, so as to increase the area where the inside and outside of the energy conversion device 112 communicate with each other and further weaken the cavity sound effect. Naturally, in the bracket 1121, a communication hole 11211 extending along the vibration direction of the energy conversion device 112 may be provided, and in the cylindrical connecting member, a through hole extending along a direction perpendicular to the vibration direction of the energy conversion device 112 may be provided, thereby increasing the area where the inside and outside of the energy conversion device 112 communicate with each other and further weakening the cavity sound effect. This is because in the process of the energy conversion device 112 generating mechanical vibrations, the air on both sides facing away from each other in the vibration direction is compressed or expanded, that is, positive and negative sound pressures are formed, and the aforementioned communication hole can connect the air on both sides facing away from each other of the energy conversion device 112 and further cancel them out in opposite phases.

[0478] In some embodiments, in the non-attached state, the frequency response curve of the vibration of the vibration panel 114 has a resonance dip, a first resonance peak, and a second resonance peak within the frequency band range of 80 Hz to 2 kHz. The peak value frequencies of the resonance dip, the first resonance peak, and the second resonance peak are defined as f0, f1, and f2 in sequence, and satisfy the relational expression f0 < f1 < f2. 80 Hz ≤ f0 ≤ 400 Hz, 80 Hz ≤ f1 ≤ 400 Hz, and 100 Hz ≤ f2 ≤ 2 kHz.

[0479] In some embodiments, in the non-attached state, the frequency response curve of the vibration of the vibration panel 114 has only one resonance peak within the frequency band range of 80 Hz to 2 kHz. The peak value frequency of the aforementioned resonance peak is 100 Hz to 2 kHz.

[0480] In some embodiments, in the non-worn state, the frequency response curve of the vibration of the vibration panel 114 has a first resonance peak and a second resonance peak within the frequency band range of 80 Hz to 2 kHz, and there is no resonance dip. The peak value frequency of the first resonance peak is from 80 Hz to 400 Hz, and the peak value frequency of the second resonance peak is from 100 Hz to 2 kHz.

[0481] In some embodiments, in the non-worn state, the frequency response curve of the vibration of the vibration panel 114 has a resonance dip, a first resonance peak, and a second resonance peak within the frequency band range of 80 Hz to 200 Hz. The peak value frequencies of the resonance dip, the first resonance peak, and the second resonance peak are defined as f0, f1, and f2 in sequence, and satisfy the relational expressions f0 < f2 and f1 < f2.

[0482] In some embodiments, the mass of the core housing 111 is 1.2 g or more, preferably 1.5 g or more, and / or the rigidity of the first vibration transmission sheet 113 is 2500 N / m or less. Further, the mass of the magnetic circuit system is 3 g or more, preferably 5 g or more, and / or the rigidity of the second vibration transmission sheet 1122 is 3000 N / m or more, preferably 5000 N / m or more.

[0483] In some embodiments, the mass of the core housing 111 is 0.5 g or less, preferably 0.3 g or less, and / or the rigidity of the first vibration transmission sheet 113 is 2000 N / m or more, preferably 5000 N / m or more.

[0484] In some embodiments, in the non-worn state, the frequency response curve of the vibration of the vibration panel 114 has a resonance peak. The resonance peak has a strong correlation with the rigidity of the bracket 1121, and the peak value frequency of the resonance peak is 4 kHz or more, preferably 5 kHz or more. The rigidity of the bracket 1121 is 10 5 N / m or more, preferably 5×10 5 N / m or more.

[0485] As shown in Figure 12, the earphone 10 may further include a head beam assembly 12 connected to the core module 11, the head beam assembly 12 may bypass the top of the user's head and position the entire core module 11 in front of the user's ears. Naturally, the core module 11 may be positioned entirely behind the user's ears or in other positions, or partially positioned in front of or behind the user's ears. In some embodiments, for example as shown in Figure 34, the core module 11 may contact the user's cheek via a core housing 111 (specifically, a first end wall 1113), i.e., the side of the core housing 111 away from the adapter housing 13 forms a contact surface that contacts the user's skin. In some other embodiments, for example as shown in Figure 1, the core module 11 may contact the user's cheek via a vibrating panel 114. In some other embodiments, for example as shown in Figure 3, the core module 11 may contact the user's cheek via the vibrating panel 114 and the surrounding member 116, or, for example as shown in Figure 45, the core module 11 may contact the user's cheek via the porous structure 1167 in the vibrating panel 114 and the surrounding member 116.

[0486] In addition to the head beam assembly 12 shown in Figure 12, the core module 11 may be connected to other types of support assemblies, which support the core module 11 in a fitting position and similarly allow the user to wear the earphones 10. For example, the support assembly includes a back-hook structure and ear hook structures connected to both ends of the back-hook structure, the back-hook structure bypassing the back of the user's brain when worn, and the two ear hook structures being placed over the user's left and right ears, respectively, when worn. Furthermore, the fitting position may be close to the ears on the user's cheeks or in front of the user's ears, away from the head.

[0487] For example, when worn, the head beam assembly 12 may form a first contact point with the user's head (e.g., shown at CP1 in Figures 13 to 17), and the core module 11 may form a second contact point with the user's cheek (e.g., shown at CP2 in Figures 13 to 17). The distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body (e.g., shown at W in Figures 13 to 17) is 20 mm to 30 mm, preferably 22 mm to 28 mm. Furthermore, the distance between the second contact point and the first contact point in the direction of the sagittal axis of the human body is preferably 25 mm. When this distance is ensured, the core module 11 can be naturally fitted to a position close to the ear on the user's cheek, and the core module 11 can vibrate at the aforementioned fitting position to generate sound waves, which can then be transmitted to the user's central nervous system via the shortest path, thereby resulting in higher sound wave transmission efficiency and less sound loss. Viewed from the direction in which the coronal axis of the human body is located, the first contact point may be located directly above the user's ear, and the second contact point may be located directly in front of the user's ear. Furthermore, the head beam assembly 12 may include an arc-shaped head beam member 121 and an adapter member 122, the arc-shaped head beam member 121 bypassing the user's crown, and both ends of the adapter member 122 connecting to the arc-shaped head beam member 121 and the core module 11, respectively. The arc-shaped head beam member 121 may be located above the user's ear and form the first contact point with the user's crown. Exemplarily, the material of the arc-shaped head beam member 121 may be plastic, the material of the adapter member 122 may be metal, and of course, both materials may be plastic or metal. If the core module 11 is configured to be close to or away from the arc-shaped head beam member 121 in the extending direction of the head beam assembly 12, for example, one end of the adapter member 122 away from the core module 11 (specifically, the first connecting portion 1221 described later) can be extended and retracted relative to the arc-shaped head beam member 121, and the portion of the arc-shaped head beam member 121 that engages with the adapter member 122 may be made of a metal member to partially reinforce the wear resistance of both.

[0488] Although Figures 13 to 17 show only the contact points formed on one side between the earphone 10 and the user's head, the earphone 10 is generally configured in a symmetrical structure. For example, both ends of the head beam assembly 12 shown in Figure 12 are connected to one core module 11, so that each core module 11 forms a second contact point with the user's cheek. In other words, the earphone 10 and the user's head can actually form one first contact point and two second contact points, which is abbreviated as "three-point wearing".

[0489] As shown in Figures 48 and 16, when worn, the center of the vibration panel 114 on the side facing the aforementioned wearing position (for example, shown at CP2 in Figure 48), when viewed from the direction in which the coronal axis of the human body is located, is closer to the external auditory canal of the user's ear than the center of the core housing 111 on the side facing the aforementioned wearing position (for example, shown at CP0 in Figure 48), when viewed from the direction in which the sagittal axis of the human body is located. In other words, if the structure of the support assembly and the core module 11 is constant, the vibration panel 114 is configured to be offset from the core housing 111, so that when the core module 11 vibrates at the aforementioned wearing position and generates sound waves, the sound waves can be transmitted to the user's central nervous system via the shortest path, thereby resulting in higher transmission efficiency and less sound loss. In addition, because the vibration panel 114 is closer to the ear canal when worn, the core module 11 can transmit mechanical vibrations generated by the energy conversion device 112 via bone conduction, and can also vibrate more air in the ear canal as a result (i.e., generate airborne sound), and can further increase the volume of sound audible to the user. In embodiments in which the core module 11 includes a surrounding member 116, the vibration panel 114 is offset from the surrounding member 116, that is, the centers of the two facing the wearing position do not overlap.

[0490] In some embodiments, the center of the vibration panel 114 orthographically projected onto the core housing 111 along the vibration direction of the energy converter 112 coincides with the center of the energy converter 112 orthographically projected onto the core housing 111 along the aforementioned vibration direction, i.e., the vibration panel 114 is not offset relative to the energy converter 112. For example, the position where the bracket 1121 is connected to the vibration panel 114 is at the center of the vibration panel 114, and the center of the energy converter 112 orthographically projected onto the core housing 111 along the aforementioned vibration direction does not coincide with the center of the core housing 111 on the side facing the energy converter 112 in the aforementioned vibration direction, i.e., the energy converter 112 as a whole is offset relative to the core housing 111.

[0491] In some other embodiments, the center of the energy converter 112 orthorectified onto the core housing 111 along its vibration direction coincides with the center of the core housing 111 on the side facing the energy converter 112 in the aforementioned vibration direction, i.e., the energy converter 112 as a whole is not offset relative to the core housing 111. The center of the vibration panel 114 orthorectified onto the core housing 111 along the aforementioned vibration direction does not coincide with the center of the energy converter 112 orthorectified onto the core housing 111 along the aforementioned vibration direction, i.e., the vibration panel 114 is offset relative to the energy converter 112, for example, by the position where the bracket 1121 is connected to the vibration panel 114 not being at the center of the vibration panel 114, thus the vibration panel 114 is offset relative to the core housing 111.

[0492] Furthermore, the earphone 10 may include an adapter housing 13 connecting the core housing 111 and the support assembly (e.g., the head beam assembly 12). As shown in Figures 20, 27, and 28, the adapter housing 13 includes a cylindrical side wall 134 located on the outer circumference of the core housing 111, and the cylindrical side wall 134 may be connected to the head beam assembly 12. Based on this, the orthographic projections of the core housing 111 and the cylindrical side wall 134 onto a reference plane perpendicular to the vibration direction of the energy converter 112 have a first center and a second center, respectively. When worn, the first center may be closer to the external auditory canal of the user's ear than the second center. In other words, as shown in Figures 46 and 28, when the structure of the support assembly and the core module 11 is constant, the core housing 111 is configured to be offset from the adapter housing 13, so that when the core module 11 vibrates at the aforementioned mounting position and generates sound waves, the sound waves can be transmitted to the user's central nervous system via the shortest path, thereby resulting in higher sound wave transmission efficiency and less sound loss.

[0493] For example, as shown in Figures 48 and 46, the core housing 111 may be configured to rotate around a first axis (for example, shown at A1 in Figure 48) relative to the adapter housing 13 so that the core module 11 is in better contact with the mounting position. The first and second centers are spaced apart along the direction in which the first axis is located. In other words, in the direction in which the first axis is located, if one side of the core housing 111 is closer to the cylindrical side wall 134, the other side of the core housing 111 may be further away from the cylindrical side wall 134, meaning that the gap between the core housing 111 and the cylindrical side wall 134 does not have to be equal in the direction in which the first axis is located. Furthermore, the first and second centers may be located on the first axis, meaning that the core module 11 is translated a certain distance along the first axis.

[0494] In some embodiments, as shown in Figures 13 to 16, when worn, the head beam assembly 12 is inclined with respect to the vertical axis of the human body, at least in part, so as to form a first and second contact point when viewed from the direction in which the coronal axis of the human body is located, and extends inclined toward, for example, directly in front of the user. In this case, the adapter member 122 may be set in the shape of a rod or a sheet. For example, as shown in Figure 13, when viewed from the direction in which the coronal axis of the human body is located, the arc-shaped head beam member 121 is inclined with respect to the vertical axis of the human body, and the adapter member 122 is parallel to the vertical axis of the human body. In this case, the adapter member 122 may be connected to the side of the core module 11 that faces the top of the user's head. Also, for example, as shown in Figure 14, when viewed from the direction in which the coronal axis of the human body is located, the arc-shaped head beam member 121 is inclined with respect to the vertical axis of the human body, and the adapter member 122 is also inclined with respect to the vertical axis of the human body, and the angle of inclination of both with respect to the vertical axis of the human body is the same. In this case, the adapter member 122 may be connected to the side of the core module 11 away from the user's cheek. Alternatively, as shown in Figure 15, for example, when viewed from the direction in which the coronal axis of the human body is located, the arc-shaped head beam member 121 is inclined with respect to the vertical axis of the human body, and the adapter member 122 is inclined with respect to the vertical axis of the human body in part and parallel to the vertical axis of the human body in other part. In this case, the adapter member 122 may be connected to the side of the core module 11 away from the user's ear. Alternatively, as shown in Figure 16, for example, when viewed from the direction in which the coronal axis of the human body is located, the arc-shaped head beam member 121 is parallel to the vertical axis of the human body, and the adapter member 122 is inclined with respect to the vertical axis of the human body in part and parallel to the vertical axis of the human body in other part. In this case, the adapter member 122 may be connected to the side of the core module 11 toward the top of the user's head.

[0495] In some other embodiments, as shown in Figure 17, the adapter member 122 may be installed in an annular shape. In this case, when worn, the arc-shaped head beam member 121 is parallel to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located, and the adapter member 122 may be fitted onto the outer circumference of the user's ear, thereby similarly forming a first contact point and a second contact point. The adapter member 122 may be a continuous, sealed annular shape or a discontinuous annular shape (e.g., C-shaped or U-shaped).

[0496] In fields such as medicine and anatomy, three basic planes of the human body—the sagittal plane, coronal plane, and horizontal plane—and three basic axes—the sagittal axis, coronal axis, and vertical axis—can be defined. The sagittal plane is a cross-section perpendicular to the ground, cut along the anterior-posterior direction of the body, dividing the body into two parts, left and right. The coronal plane is a cross-section perpendicular to the ground, cut along the lateral direction of the body, dividing the body into two parts, front and back. The horizontal plane is a cross-section parallel to the ground, cut along the vertical direction of the body, dividing the body into two parts, upper and lower. Accordingly, the sagittal axis is the axis that passes perpendicularly through the coronal plane along the anterior-posterior direction of the body, the coronal axis is the axis that passes perpendicularly through the sagittal plane along the lateral direction of the body, and the vertical axis is the axis that passes perpendicularly through the horizontal plane along the vertical direction of the body.

[0497] Illustratively, as shown in Figures 12, 16, and 20, the adapter member 122 may include a first connecting portion 1221, an intermediate transition portion 1222, and a second connecting portion 1223, the intermediate transition portion 1222 connecting the first connecting portion 1221 and the second connecting portion 1223. The first connecting portion 1221 and the second connecting portion 1223 are bent relative to the intermediate transition portion 1222 and extended in opposite directions. In this case, the first connecting portion 1221 may be connected to the arc-shaped head beam member 121, and the second connecting portion 1223 may be connected to the core module 11. Viewed from the direction in which the coronal axis of the human body is located, the intermediate transition portion 1222 is inclined with respect to the vertical axis of the human body so as to form a first contact point and a second contact point.

[0498] Furthermore, the bending angle of the first connecting portion 1221 with respect to the intermediate transition portion 1222 (for example, shown as θ1 in Figure 16) may be 90° or more and less than 180°, and / or the bending angle of the second connecting portion 1223 with respect to the intermediate transition portion 1222 (for example, shown as θ2 in Figure 16) may be 90° or more and less than 180°. In this way, the adapter member 122 allows for a smoother transition connection between the arc-shaped head beam member 121 and the core module 11. When worn, the first connecting portion 1221 may be parallel to the second connecting portion 1223 when viewed from the direction in which the coronal axis of the human body is located. In this case, the distance between the first connecting portion 1221 and the second connecting portion 1223 (for example, shown as W in Figure 16) may be 20mm to 30mm, preferably 22mm to 28mm.

[0499] Furthermore, as shown in Figure 19, the adapter member 122 may have a curved arc in other viewing angles (for example, when viewed from the direction in which the sagittal axis of the human body is located). For example, the adapter members 122 at both ends of the arc-shaped head beam member 121 may extend toward each other in the same direction so that the earphone 10 makes better contact with the user's head and the head beam assembly 12 provides pressing force to the core module 11.

[0500] Furthermore, as shown in Figure 20, wiring cavities may be provided in the first connection portion 1221 and the second connection portion 1223, for example, both may be provided in a hollow tubular shape, and a slot 1224 may be formed in the intermediate transition portion 1222, the slot 1224 communicating the wiring cavities of the first connection portion 1221 and the second connection portion 1223 so as to allow the wiring of the earphone 10 to extend from the core module 11 through the adapter member 122 to the arc-shaped head beam member 121. The wiring of the earphone 10 may be a conductor, a flexible substrate, etc. Accordingly, the head beam assembly 12 may further include a sealing member fitted into the slot 1224, the sealing member improving the waterproof and dustproof properties of the earphone 10 by covering the wiring, and is also advantageous for improving the appearance of the earphone 10. The sealing member may be a cured colloid or a cover plate. Naturally, in some other embodiments, the wiring of the earphone 10 may be exposed from the adapter member 122, and accordingly, the adapter member 122 may be configured as a solid structure.

[0501] The inventors of this invention have discovered the following through long-term research: When the head beam assembly 12 applies a pressing force of 0.4N to 0.8N to press the core module 11 against the user's cheek, i.e., in the worn state, the pressing force of the core module 11 against the user's cheek is 0.4N to 0.8N, preferably 0.5N to 0.6N, and the user can obtain excellent wearing stability, comfort, and good sound quality. The pressing force can be measured using a clamp testing machine (FL-86161A, Hakubun Kiki). Specifically, during measurement, the earphone 10 is placed between the parallel plates of the clamp testing machine and supported by the intermediate fork of the clamp testing machine. Then, the parallel plates of the clamp testing machine separate the two core modules 11 from each other and provide a test interval (e.g., an average of 145mm, the width of a person's head) to simulate a user wearing the earphone 10. In this case, the corresponding pressing force can be measured by reading the value displayed on the clamp testing machine. Different users have different head sizes (e.g., some have large heads and others have small heads). Therefore, the head beam assembly 12 may be configured with an adjustable arc length to meet the different users' fitting needs for the earphones 10. Furthermore, the present invention desires that different users will all obtain a consistent pressing force when wearing the earphones 10.

[0502] Exemplary, the first connecting portion 1221 can be extended or retracted relative to the arc-shaped head beam member 121 by external force, thereby allowing the core module 11 to move closer to or further away from the arc-shaped head beam member 121 in the extending direction of the head beam assembly 12, and further adjusting the arc length of the head beam assembly 12. Naturally, the second connecting portion 1223 can also be extended or retracted relative to the core module 11 by external force, and similarly, the arc length of the head beam assembly 12 can be adjusted.

[0503] Furthermore, as shown in Figure 12, adapter members 122 and core modules 11 may be installed at both ends of the arc-shaped head beam member 121. The head beam assembly 12 provides a first pressing force to the core module 11 in the first usage state and a second pressing force to the core module 11 in the second usage state, and the absolute value of the difference between the second pressing force and the first pressing force is 0 to 0.1 N, preferably 0 to 0.05 N. In this way, when different users are wearing the earphones 10, that is, when the head beam assembly 12 has different arc lengths and the two core modules 11 have different spacings, the head beam assembly 12 ensures that the difference in the pressing force applied by the core modules 11 to the user's cheek is not large, and further increases the adaptability of the earphones 10 to different users.

[0504] The first usage state may be defined as a state in which each adapter member 122 has a first extension amount relative to the arc-shaped head beam member 121 and there is a first gap between the two core modules 11, and the second usage state may be defined as a state in which each adapter member 122 has a second extension amount relative to the arc-shaped head beam member 121 and there is a second gap between the two core modules 11. The second extension amount is greater than the first extension amount, and the second gap is greater than the first gap. In short, the first usage state is likely to be worn by users with small heads, and the second usage state is likely to be worn by users with large heads. Therefore, when the core module 11 is closest to the arc-shaped head beam member 121, the first extension amount can take its minimum value, and when the core module 11 is furthest from the arc-shaped head beam member 121, the second extension amount can take its maximum value.

[0505] The inventors of this invention have discovered, through long-term research, that under the same conditions, parameters such as the rigidity and degree of curvature of the arc-shaped head beam member 121 and the adapter member 122 have a certain influence on the pressing force that the head beam assembly 12 can provide, and a qualitative analysis of this is currently being conducted.

[0506] As shown in Figure 18, a cantilever beam bends and deforms under loads such as concentrated forces and distributed loads, with a maximum deflection w. max This occurs at the free end of the cantilever beam.

[0507] For a cantilever beam with a uniform cross-section, as shown in Figure 18(a), the deflection at the free end satisfies the following relationship (1) based on material mechanics.

[0508]

number

[0509] In the formula, EI is the bending stiffness of the cross-section, M(x) is the bending moment of the cross-section, E is the Young's modulus of the material, and I is the moment of inertia of the cross-section.

[0510] For variable-section cantilever beams, as shown in Figure 18(b), the characteristics of the cross-section of the variable-section beam change, so a stepwise stiffness calculation method can be used when analyzing the displacement of its free end. That is, the variable-section cantilever beam can be considered as consisting of multiple cantilever beams of equal cross-section, and the remaining cantilever beam portions other than the studied cantilever beam portion can be considered as rigid bodies when calculating the deformation. Finally, the displacement deformation under the same load conditions is superimposed. This method is generally used for outrigger cantilever beams or variable-section cantilever beams. Accordingly, the deflection of the free end satisfies the following relation (2).

[0511]

number

[0512] For headphones like those shown in Figure 12, the le...

Claims

1. An earphone, The system includes a core module, a battery and a motherboard coupled to the core module, wherein the core module includes a core housing and an energy conversion device installed in a housing cavity of the core housing, which transmits mechanical vibrations generated by the energy conversion device via bone conduction, the battery is configured to supply power to the motherboard, and the motherboard is configured to control the energy conversion device converting electrical signals into mechanical vibrations. The head beam assembly includes a head beam assembly that bypasses the user's head and positions the core module in front of the user's ears. When worn, the head beam assembly forms a first contact point with the user's head, and the core module forms a second contact point with the user's cheek. The distance between the second and first contact points in the direction of the sagittal axis of the human body is 20 mm to 30 mm. The earphone is characterized in that it includes an adapter housing, the core housing includes a first core housing connected to the adapter housing, the first core housing includes an inner cylinder wall, an outer cylinder wall and a transition wall, the inner cylinder wall is located on the outer circumference of the energy conversion device, the outer cylinder wall is located on the outer circumference of the inner cylinder wall and is spaced apart from the inner cylinder wall in a direction perpendicular to the vibration direction of the energy conversion device, the transition wall is connected between the inner cylinder wall and the outer cylinder wall, the outer cylinder wall, the inner cylinder wall and the transition wall form an acoustic cavity, the acoustic cavity communicates with the housing cavity and the air in the housing cavity absorbs the acoustic energy of sound waves generated in conjunction with the vibration of the energy conversion device.

2. The earphone according to claim 1, wherein the core module further includes a first vibration transmission sheet and a vibration panel, the energy conversion device is suspended within the housing cavity via the first vibration transmission sheet, and the vibration panel is connected to the energy conversion device and in contact with the user's skin.

3. The earphone according to claim 1 or 2, characterized in that the adapter housing has a housing space for housing electronic components, the core housing is elastically connected to the adapter housing, and the core housing or the adapter housing is connected to the head beam assembly.

4. The earphone according to claim 1 or 2, wherein the head beam assembly includes an arc-shaped head beam member and an adapter member, the arc-shaped head beam member bypasses the top of the user's head, the adapter member includes a first connecting portion, an intermediate transition portion and a second connecting portion, the intermediate transition portion connects the first connecting portion and the second connecting portion, the first connecting portion and the second connecting portion are each bent relative to the intermediate transition portion and extend in opposite directions, the first connecting portion is connected to the arc-shaped head beam member, the second connecting portion is connected to the core module, and the intermediate transition portion is inclined with respect to the vertical axis of the human body when viewed from the direction in which the coronal axis of the human body is located.

5. The earphone according to claim 4, characterized in that the bending angle of the first connection portion with respect to the intermediate transition portion is 90° or more and less than 180°, and / or the bending angle of the second connection portion with respect to the intermediate transition portion is 90° or more and less than 180°.

6. The first connecting portion can be extended and retracted relative to the arc-shaped head beam member by external force. The adapter member and the core module are installed at both ends of the arc-shaped head beam member, and the head beam assembly provides a first pressing force to the core module in a first operating state, and provides a second pressing force to the core module in a second operating state, and the absolute value of the difference between the second pressing force and the first pressing force is 0 to 0.1 N. The earphone according to claim 4, characterized in that the first usage state is defined as a usage state in which each adapter member has a first extension amount relative to the arc-shaped head beam member and there is a first spacing between the two core modules, and the second usage state is defined as a usage state in which each adapter member has a second extension amount relative to the arc-shaped head beam member and there is a second spacing between the two core modules, wherein the second extension amount is greater than the first extension amount and the second spacing is greater than the first spacing.

7. The earphone according to claim 1, wherein the head beam assembly includes an arc-shaped head beam member and an auxiliary member connected to the arc-shaped head beam member, and in the worn state, the arc-shaped head beam member is positioned above the user's ears to form a first contact point with the top of the user's head, and the auxiliary member forms a third contact point with the user's head.

8. The auxiliary member extends toward the intermediate region of the arc-shaped head beam member, The earphone according to claim 7, characterized in that, in its natural state, the head beam assembly has a first reference plane and a second reference plane which are orthogonal to each other, the second reference plane passing through the highest point and two endpoints of the arc-shaped head beam member, the fixed end of the auxiliary member connected to the arc-shaped head beam member having a first distance from the highest point in a reference direction perpendicular to the line connecting the two endpoints of the arc-shaped head beam member in the second reference plane, the position where the core module is connected to the head beam assembly having a second distance from the highest point in the reference direction, and the ratio of the first distance to the second distance being 1 / 3 to 1 / 2.

9. The auxiliary member extends toward the end of the arc-shaped head beam member, The earphone according to claim 7, characterized in that, in its natural state, the head beam assembly has a first reference plane and a second reference plane which are orthogonal to each other, the second reference plane passing through the highest point and two endpoints of the arc-shaped head beam member, the fixed end of the auxiliary member connected to the arc-shaped head beam member being at a third distance from the highest point in a reference direction perpendicular to the line connecting the two endpoints of the arc-shaped head beam member in the second reference plane, the position where the core module is connected to the head beam assembly being at a fourth distance from the highest point in the reference direction, and the ratio of the third distance to the fourth distance being 1 / 5 to 1 / 3.

10. The auxiliary member includes a fixing portion, a first extension portion connected to the fixing portion, and a second extension portion connected to the first extension portion, wherein the fixing portion is connected to the arc-shaped head beam member. The earphone according to claim 7, characterized in that, when worn, the first extension and the second extension are located on the side of the arc-shaped head beam member facing the user's head, and in a natural state are positioned spaced apart from the arc-shaped head beam member, thereby configuring the auxiliary member to form a third contact point with the user's head.

11. The earphone according to claim 10, characterized in that the frequency response curve of the sound wave has a resonance peak, the acoustic cavity is a Helmholtz resonance cavity, and the peak resonance intensity of the resonance peak is reduced.

12. The earphone according to claim 11, characterized in that the peak resonant frequency of the resonant peak is 500 Hz to 4 kHz, and the difference between the peak resonant intensity of the resonant peak when the opening connecting the Helmholtz resonant cavity and the housing cavity is open and the peak resonant intensity of the resonant peak when the opening connecting the Helmholtz resonant cavity and the housing cavity is closed is 3 dB or more.

13. The earphone according to claim 11 or 12, wherein the first core housing further includes a cover plate connected between the inner cylinder wall and the outer cylinder wall, the cover plate and the transition wall are spaced apart in the vibration direction, and together with the outer cylinder wall, the inner cylinder wall and the transition wall, surround the Helmholtz resonance cavity.

14. The earphone according to any one of claims 1, 2, and 7 to 12, characterized in that the acoustic cavity is an acoustic filter, and the cutoff frequency of the acoustic filter is 5 kHz or less.

Images