Bone conduction loudspeaker and earphone

Abstract

The invention discloses a bone conduction loudspeaker and an earphone, the bone conduction loudspeaker comprises a cylindrical cover body, a driving assembly and two sealing plates, and the cylindrical cover body defines an accommodating space. The driving assembly is arranged in the containing space and connected with the cylindrical cover body. The two sealing plates are arranged at the two ends of the cylindrical cover body correspondingly and seal the containing space. Through the mode, the driving assembly in the bone conduction loudspeaker can be limited, the sound quality effect of the bone conduction loudspeaker is improved, and the service life of the bone conduction loudspeaker is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to bone conduction speakers and headphones. Background Art

[0002] Bone conduction headphones utilize bone conduction technology to convert sound into mechanical vibrations of varying frequencies, transmitting the sound waves through the skull, bony labyrinth, inner ear lymph, gyrus, and auditory center. Bone conduction headphones are now widely used in daily life. However, vibrations often cause the bone conduction components in headphones to shift, affecting sound quality. Summary of the Invention

[0003] In order to solve the above technical problems, the present application provides a bone conduction speaker and headphones, which can limit the driving components in the bone conduction speaker, improve the sound quality of the bone conduction speaker, and increase the service life of the bone conduction speaker.

[0004] To address the above technical issues, this application employs a technical solution to provide a bone conduction speaker comprising a cylindrical housing, a driver assembly, and two sealing plates. The cylindrical housing defines a storage space. The driver assembly is disposed within the storage space and connected to the cylindrical housing. The two sealing plates are disposed at either end of the cylindrical housing to seal the storage space.

[0005] In some embodiments, the bone conduction speaker includes a vibration transmission piece, which connects the driving assembly and the cylindrical cover. In the direction of the central axis of the cylindrical cover, the vibration transmission piece is arranged between the driving assembly and the sealing plate and is arranged opposite to the sealing plate.

[0006] In some embodiments, at least one end of the cylindrical cover is stepped to form a first support surface and a second support surface with a stepped height difference along the central axis, with the second support surface being closer to the central axis of the cylindrical cover than the first support surface. The sealing plate is fixedly supported on the first support surface. The periphery of the vibration transmission plate is fixedly supported on the second support surface.

[0007] In some embodiments, the two sealing plates are fixedly connected to the two ends of the cylindrical cover, and the periphery of the vibration transmission plate is fixed to the inner wall of the cylindrical cover.

[0008] In some embodiments, the vibration transmission plate is fixedly connected to one end of the cylindrical cover, and the sealing plate is fixedly stacked on a side of the vibration transmission plate away from the driving assembly and spaced apart from the cylindrical cover.

[0009] In some embodiments, there are two vibration transmission plates, which are respectively fixedly connected to the cylindrical cover body, and two sealing plates are respectively arranged on the side of the two vibration transmission plates away from the driving assembly.

[0010] In some embodiments, the drive assembly includes a voice coil assembly and a magnet assembly, wherein a first one of the voice coil assembly and the magnet assembly is disposed around a second one of the voice coil assembly and the magnet assembly, and the first one of the voice coil assembly and the magnet assembly is fixedly connected to the cylindrical cover. A vibration transmission plate is fixedly connected to the second one of the voice coil assembly and the magnet assembly and the cylindrical cover. The vibration transmission plate and the sealing plate are disposed relative to each other along a central axis, and the vibration transmission plate is used to elastically constrain relative movement of the voice coil assembly and the magnet assembly along the central axis of the cylindrical cover.

[0011] In some embodiments, the vibration transmission plate is located between the second one of the voice coil assembly and the magnet assembly and the corresponding sealing plate, and the sealing plate is used to rigidly constrain the deformation amplitude of the vibration transmission plate along the central axis direction, thereby rigidly constraining the relative movement range of the voice coil assembly and the magnet assembly.

[0012] In some embodiments, the vibration transmission plate includes a central fixing portion, an annular fixing portion surrounding the central fixing portion, and a connecting rod assembly connecting the central fixing portion and the annular fixing portion. The annular fixing portion is connected to the cylindrical cover, and the central fixing portion is connected to the second of the voice coil assembly and the magnet assembly. In a natural state, the central fixing portion and the corresponding sealing plate are spaced apart along the central axis.

[0013] In some embodiments, the distance between the central fixing portion and the corresponding sealing plate ranges from 0.005 to 0.8 mm.

[0014] In some embodiments, in a natural state, the central fixing portion is closer to the second of the voice coil assembly and the magnet assembly than the annular fixing portion along the central axis. The magnet assembly includes a magnet and two magnetic conductive plates, the two magnetic conductive plates being disposed on opposite sides of the magnet along the central axis. The magnetic conductive plates have a raised portion that protrudes toward the central fixing portion, the raised portion being fixedly connected to the central fixing portion.

[0015] In some embodiments, the voice coil assembly includes two groups of voice coils spaced apart along the central axis, a cylindrical cover is wound around the periphery of the two groups of voice coils, and two magnetic conductive plates are respectively arranged so that their radial projections along the bone conduction speaker at least partially overlap with the two groups of voice coils, and the power supply directions of the two groups of voice coils are opposite to each other.

[0016] In some embodiments, the accommodation space is filled with magnetic fluid, and the magnetic fluid occupies at least a portion of the accommodation space.

[0017] To solve the above technical problem, another solution adopted by the present application is to provide an earphone, characterized by comprising a housing assembly and the above-mentioned bone conduction speaker, wherein the housing assembly defines an accommodation space, and the bone conduction speaker is disposed in the accommodation space.

[0018] The beneficial effect of the present application is that, unlike the prior art, the present application adds two sealing plates on both sides of the bone conduction speaker to seal the cylindrical cover, so as to confine the driving assembly within the accommodation space of the cylindrical cover, thereby making it difficult for the driving assembly to fall out of the accommodation space, thereby improving the sound quality of the bone conduction speaker and increasing the service life of the bone conduction speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the assembled three-dimensional structure of an earphone embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of a speaker assembly embodiment and a partial ear hook of the present application;

[0021] Figure 3a yes Figure 2 An exploded schematic diagram of the structure of an embodiment of a loudspeaker assembly is shown;

[0022] Figure 3b yes Figure 2 Schematic diagram of the explosion of another embodiment of the loudspeaker assembly shown

[0023] Figure 4 yes Figure 2 A schematic cross-sectional view of the loudspeaker assembly embodiment along the AA section line;

[0024] Figure 5a yes Figure 2 Another cross-sectional structural diagram of the loudspeaker assembly embodiment shown along the AA section line;

[0025] Figure 5b yes Figure 2 Another cross-sectional structural diagram of the loudspeaker assembly embodiment along the AA section line

[0026] Figure 6 yes Figure 2 Another schematic perspective view of the structure of the loudspeaker assembly embodiment;

[0027] Figure 7 yes Figure 2 A schematic diagram of the positional relationship between the first central axis and the second central axis in the embodiment of the loudspeaker assembly shown;

[0028] Figure 8 yes Figure 3a An exploded schematic diagram of the structure of the bone conduction speaker embodiment shown;

[0029] Figure 9 yes Figure 8 A schematic cross-sectional view of the bone conduction speaker embodiment along the BB section line;

[0030] Figure 10 yes Figure 3a A schematic diagram of the three-dimensional structure of an air conduction loudspeaker embodiment shown;

[0031] Figure 11 yes Figure 10 An exploded schematic diagram of the structure of the air conduction loudspeaker embodiment shown;

[0032] Figure 12 yes Figure 2 A schematic exploded view of the structure of another embodiment of a loudspeaker assembly of the present application is shown;

[0033] Figure 13 yes Figure 2 A schematic cross-sectional view of an embodiment of a loudspeaker assembly taken along line AA;

[0034] Figure 14 yes Figure 2 A schematic cross-sectional view of another embodiment of the loudspeaker assembly along the AA section line;

[0035] Figure 15 yes Figure 2 A schematic cross-sectional view of another embodiment of the loudspeaker assembly along the AA section line;

[0036] Figure 16 yes Figure 8 A schematic structural diagram of a vibration transmitting piece in an embodiment of a bone conduction speaker is shown;

[0037] Figure 17 is a schematic exploded view of the structure of yet another embodiment of a loudspeaker assembly of the present application;

[0038] Figure 18 yes Figure 17 A schematic cross-sectional view of an embodiment of a loudspeaker assembly taken along the CC section line;

[0039] Figure 19 yes Figure 17 A schematic cross-sectional view of another embodiment of the loudspeaker assembly along the CC cutting line;

[0040] Figure 20 yes Figure 17 A schematic cross-sectional view of another embodiment of the loudspeaker assembly along the CC cutting line;

[0041] Figure 21 yes Figure 17 Another cross-sectional structural schematic diagram of the loudspeaker assembly embodiment is shown along the CC cutting line. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] like Figure 1 As shown, the earphone 1 may include a speaker assembly 10 , an ear hook 20 and a back hook 30 .

[0044] The speaker assembly 10 may include a speaker and a movement module including a corresponding assembly shell, circuit components, etc. The number of speaker assemblies 10 may be two. The two speaker assemblies 10 are respectively used to transmit vibration and / or sound to the left ear and right ear of the user. The two speaker assemblies 10 may be the same or different. For example, one speaker assembly 10 may be provided with a microphone, while the other speaker assembly 10 may not be provided with a microphone. Of course, both speaker assemblies 10 may be provided with a microphone. For another example, one speaker assembly 10 may be provided with a button and a corresponding circuit board, while the other speaker assembly 10 may not be provided with the button and the corresponding circuit board. The speakers included in the two speaker assemblies 10 may be the same or different. The speaker assembly 10 described later in this article may be considered to be described in detail by taking one of the two speaker assemblies 10 as an example.

[0045] Alternatively, there may be two ear hooks 20, each mounted on the user's left and right ears, allowing the speaker assembly 10 to conform to the user's face. For example, one ear hook 20 may contain a battery, while the other ear hook 20 may contain a control circuit. One end of the ear hook 20 is connected to the speaker assembly 10, and the other end is connected to the back hook 30. The ear hook 20 may also be referred to as the wearing assembly 20.

[0046] The back hook 30 can be connected to the two ear hooks 20. The back hook 30 can be wrapped around the back of the user's neck or head and can provide a clamping force, so that the two speaker assemblies 10 are clamped to the sides of the user's face and the ear hooks 20 are more securely fixed to the user's ears. Of course, the earphones 1 can also not include the back hook 30, and the speaker assemblies 10 can be worn on the user's ears via the ear hooks 20.

[0047] In some embodiments, the earphone 1 may not include the rear hanging component 30, and the speaker component 10 may be worn on the user's ear via the ear hook 20. Alternatively, in some embodiments, the earphone 1 may not include the ear hook 20, and the speaker component 10 may be connected via a head-mounted structure or a neck-mounted structure, and the speaker component 10 may be placed closely against the user's face or firmly on the outside of the user's ear via the head-mounted structure or the neck-mounted structure.

[0048] The following content mainly describes the structure of the speaker assembly 10 and other parts of the earphone 1 by way of example.

[0049] like Figures 2 to 4 As shown, the speaker assembly 10 includes a housing assembly 100, a bone conduction speaker 200, and an air conduction speaker 300. The housing assembly 100 may define a receiving space 110. The air conduction speaker 300 may be disposed within the receiving space 110, and the bone conduction speaker 200 may be disposed within the receiving space 110.

[0050] The accommodating space 110 is formed in the housing assembly 100, and the accommodating space 110 accommodates the air conduction speaker 300 and the bone conduction speaker 200. The accommodating space 110 can be a large integral space, or can be divided into two or more connected or non-connected small spaces. Figure 3a In the illustrated embodiment, the housing assembly 100 may be provided with a first accommodating cavity 111 and a second accommodating cavity 112 , wherein the first accommodating cavity 111 and the second accommodating cavity 112 may be two spaces that are connected or not connected.

[0051] In some embodiments, as Figure 3a As shown, the shell assembly 100 may also be provided with a connecting hole 113 connecting the first accommodating chamber 111 and the second accommodating chamber 112. In this way, at least the first accommodating chamber 111, the second accommodating chamber 112 and the connecting hole 113 can together form the accommodating space 110. The bone conduction speaker 200 can be disposed in the first accommodating chamber 111 and block the connecting hole 113 so that the first accommodating chamber 111 and the second accommodating chamber 112 are isolated from each other. The air conduction speaker 300 can be disposed in the second accommodating chamber 112. In other embodiments, the connecting hole 113 may not be provided between the first accommodating chamber 111 and the second accommodating chamber 112, and the shell assembly 100 itself may isolate the two from each other and prevent them from communicating with each other.

[0052] Among them, the air conduction speaker 300 is used to conduct sound into the user's ear canal through the principle of air vibration, and the bone conduction speaker 200 is used to conduct sound to the user through bone conduction vibration. Since the second accommodating cavity 112 where the air conduction speaker 300 is located needs to be connected to the outside world to facilitate the conduction of sound waves through the air, and the bone conduction speaker 200 requires a highly sealed environment to ensure the effect of bone conduction, the bone conduction speaker 200 and the air conduction speaker 300 are independently arranged in two different cavities in the accommodating space 110. This can effectively reduce the mutual interference between the bone conduction speaker 200 and the air conduction speaker 300, thereby effectively improving the sound quality of the earphone 1. The sealing can be understood as the airtightness of the cavity space.

[0053] Based on the above, a connecting hole 113 is provided between the first accommodating chamber 111 and the second accommodating chamber 112, and the bone conduction speaker 200 is used to block the connecting hole 113 on one side. This can expand the usable space of the first accommodating chamber 111 while ensuring the strong sealing of the second accommodating chamber 112. This can effectively improve the ease of assembly of the air conduction speaker 300 and the reliability of the structural setup. It can also simply and effectively expand the volume of the sound cavity space formed by the air conduction speaker 300 in the second accommodating chamber 112, thereby improving the sound effect and sound quality of the air conduction speaker 300. In other words, while maintaining the same sound cavity space volume, the air conduction speaker 300 can be placed closer to the side of the bone conduction speaker 200, which can reduce the size of the speaker assembly 10 and achieve a more compact overall size.

[0054] In some embodiments, as Figure 3a as well as Figure 4 As shown, the housing assembly 100 may be provided with a sound outlet 114 and a pressure relief hole 115 communicating with the second accommodating cavity 112 and the external environment. The sound outlet 114 and the pressure relief hole 115 may be arranged at intervals.

[0055] The air conduction speaker 300 is disposed in the second accommodating chamber 112. The second accommodating chamber 112 may form a sound cavity space (external acoustic sound cavity) of the air conduction speaker 300.

[0056] A connecting hole 113 is provided between the first accommodating chamber 111 and the second accommodating chamber 112, allowing the second accommodating chamber 112 to communicate with the connecting hole 113. The bone conduction speaker 200 blocks the connecting hole 113 on the side of the second accommodating chamber 112 opposite the connecting hole 113. Therefore, the sound cavity space in the second accommodating chamber 112 can be widened into the connecting hole 113, thereby increasing the volume of the acoustic sound cavity and improving the acoustic effect. The sound outlet hole 114 can be used to guide the sound waves generated by the air conduction speaker 300 out of the speaker assembly 10 for propagation into the user's ear canal. The pressure relief hole 115 is provided to connect the second accommodating chamber 112 with the external environment, allowing air to flow freely between the second accommodating chamber 112 and the air conduction speaker 300, preventing the gas in the second accommodating chamber 112 from damping the vibration of the air conduction speaker 300, thereby affecting the sound quality of the air conduction speaker 300. Therefore, the provision of the pressure relief hole 115 can provide the earphone 1 with better sound quality.

[0057] By spacing the sound outlet hole 114 and the pressure relief hole 115 apart, the mutual interference between the sound outlet hole 114 and the pressure relief hole 115 can be reduced, so that the air pressure released from the pressure relief hole 115 is less likely to affect the sound waves transmitted in the sound outlet hole 114, thereby improving the sound quality of the earphone 1.

[0058] In some embodiments, as Figure 3a and Figure 4 As shown, the pressure relief hole 115 is connected to the second accommodating chamber 112 , and the communicating hole 113 is communicated with the second accommodating chamber 112 . The pressure relief hole 115 can be connected to the communicating hole 113 through the second accommodating chamber 112 .

[0059] In another embodiment, Figure 3b and Figure 5b As shown, the connecting hole 113 can be directly connected to the pressure relief hole 115. The bone conduction speaker 200 can also block the connecting hole 113 on the side of the connecting hole 113 facing the first accommodating chamber 111, thereby ensuring the airtightness of the first accommodating chamber 111. At the same time, it can also increase the area of ​​the air inlet end of the pressure relief hole 115, improve the pressure relief effect of the pressure relief hole 115, and thus improve the sound quality of the speaker assembly.

[0060] In some embodiments, as Figure 3a and Figure 4 As shown, the air conduction speaker 300 can be configured to separate the second accommodating chamber 112 into a first sub-chamber 1121 and a second sub-chamber 1122, which are isolated from each other. The first sub-chamber 1121 and the second sub-chamber 1122 are not connected to each other. The sound outlet 114 can be connected to the first sub-chamber 1121, while the pressure relief hole 115 can be connected to the second sub-chamber 1122. Furthermore, the communication hole 113 can be connected to the second sub-chamber 1122.

[0061] Alternatively, as Figure 3a As shown, the air conduction speaker 300 may include a diaphragm 310 and a drive mechanism 320, which may be connected to the diaphragm 310. An internal sound cavity 330 may be defined between the diaphragm 310 and the drive mechanism 320. The side of the diaphragm 310 facing away from the internal sound cavity 330 is the sound cavity space, also known as the second sub-cavity 1122. The drive mechanism 320 is configured to be controlled by an electrical signal to drive the diaphragm 310 to vibrate, thereby vibrating the air in the internal sound cavity 330 of the air conduction speaker 300 and generating air-conducted sound waves. The air-conducted sound waves are then transmitted out of the speaker assembly 10 through the first sub-cavity 1121 and the second sub-cavity 1122 (i.e., the sound cavity space) and the sound outlet 114.

[0062] In this case, the presence of the communicating hole 113 can increase the volume of the second sub-cavity 1122 , that is, the volume of the sound cavity space can be increased, thereby enhancing the sound quality of the speaker assembly 10 .

[0063] Specifically, when the earphone 1 is working, part of the sound waves generated by the air conduction speaker 300 using the principle of air vibration can be transmitted out of the speaker assembly 10 through the first sub-cavity 1121 and the sound outlet 114. The pressure relief hole 115 can connect the second sub-cavity 1122 with the external environment, so that air can flow freely between the external environment and the second sub-cavity 1122. If the second sub-cavity 1122 is closed, then when the air conduction speaker 300 is working, the air in the second sub-cavity 1122 will produce air damping on the vibration of the air conduction speaker 300, which will affect the sound quality of the air conduction speaker 300. In this way, the air pressure balance between the second sub-cavity 1122 and the external environment can be maintained through the pressure relief hole 115, thereby reducing the impact on the sound generated by the air conduction speaker 300, and further reducing the impact on the sound quality of the earphone 1.

[0064] In some embodiments, the number of pressure relief holes 115 can be one or more, with multiple pressure relief holes 115 spaced apart. Multiple pressure relief holes 115 can enhance the pressure relief effect, allowing the earphone 1 to have better sound quality. Optionally, at least two pressure relief holes 115 on the housing assembly 100 that connect to the external environment can be located on different sides of the housing assembly 100, thereby reducing the probability of interference enhancement caused by the pressure relief holes 115.

[0065] In some embodiments, as Figure 3a 、 Figure 4 as well as Figure 5a As shown, the housing assembly 100 may include a first housing 120, a second housing 130 and a third housing 140. The second housing 130 and the first housing 120 may cooperate to form a first accommodating cavity 111 (in Figure 4 The first housing 120 is schematically marked in the figure, but it does not mean that the first housing cavity 111 is only the portion shown on the first housing 120). The third housing 140 and the first housing 120 can cooperate to form the second housing cavity 112 (in the figure). Figure 4 (The second housing 112 is schematically marked on the first housing 120, but this does not mean that the second housing 112 is only the portion shown on the first housing). The connecting hole 113 can be opened in the first housing 120. The third housing 140 can be provided with a sound outlet 114 connecting the second housing 112 and the external environment, and the first housing 120 can be provided with a pressure relief hole 115 connecting the second housing 112 and the external environment. Optionally, the pressure relief hole 115 can be provided on the side of the first housing 120 facing away from the third housing 140, thereby making the distance between the pressure relief hole 115 and the sound outlet 114 greater.

[0066] By forming the first accommodating chamber 111 and the second accommodating chamber 112 by arranging the first shell 120, the second shell 130, and the third shell 140 to abut against each other, the assembly and disassembly of the speaker assembly 10 can be facilitated, and the structural tightness and stability of the speaker assembly 10 can be improved. The sound outlet 114 is arranged in the third shell 140, and the pressure relief hole 115 is arranged in the first shell 120. This can increase the distance between the sound outlet 114 and the pressure relief hole 115, thereby reducing the mutual interference between the sound waves transmitted by the sound outlet 114 and the pressure relief hole 115, and reducing the probability of the sound waves transmitted by the sound outlet 114 and the pressure relief hole 115 interfering with each other in the near field, thereby improving the sound quality of the earphone 1.

[0067] like Figure 2 As shown, the earphones may include a wearing component 20 and a speaker component 10 as described above. The wearing component 20 may also be referred to as an ear hook 20. Specifically, the wearing component 20 may be connected to the first shell 120. Connecting the wearing component 20 to the first shell 120 may make the connection between the wearing component 20 and the speaker component 10 tighter, and may not easily detach from the speaker component 10 during use. Optionally, the positions of the first shell 120 and the wearing component 20 correspond to the first accommodating cavity 111. Specifically, when the wearing component 20 is assembled on the first shell 120, it may point to the first accommodating cavity 111, so that the first shell 120 is closer to the first accommodating cavity 111 than the swing position of the wearing component 20. When the bone conduction speaker 200 vibrates the first shell 120, the first shell may swing with a larger amplitude and at a faster speed, thereby improving the bone conduction sound quality.

[0068] In some embodiments, as Figures 3a to 4 As shown, the housing assembly 100 may include a partition wall 150 for separating the first accommodating chamber 111 from the second accommodating chamber 112. The communication hole 113 may be formed in the partition wall 150. The bone conduction speaker 200 may block the communication hole 113 on the side of the partition wall 150 facing the first accommodating chamber 111.

[0069] The partition wall 150 separates the first and second accommodating chambers 111 and 112, further separating the bone conduction speaker 200 and the air conduction speaker 300. This prevents the air vibrations generated by the bone conduction speaker 200 within the first accommodating chamber 111 from affecting the partial cancellation of the air-conducted sound waves of the air conduction speaker 300, thereby preventing the bone conduction speaker 200 from affecting the transmission of the air-conducted sound waves. It also reduces the chances of the bone conduction speaker 200 and the air conduction speaker 300 from abutting against each other and causing damage. The partition wall 150 separating the first and second accommodating chambers 111 and 112 also improves assembly ease of the bone conduction speaker 200 and the air conduction speaker 300. Furthermore, the bone conduction speaker 200 blocks the connecting hole 113 on the side of the partition wall 150 facing the first accommodating chamber 111, allowing the connecting hole 113 to connect to the second accommodating chamber 112, creating a larger volume and thereby improving the air-conducted sound quality of the air conduction speaker 300.

[0070] In some embodiments, as Figure 4 As shown, the bone conduction speaker 200 can abut against the partition wall 150 to block the communication hole 113. In other words, a wall surface of the bone conduction speaker 200 directly or indirectly abuts against the partition wall 150 to block the communication hole 113, thereby ensuring the airtightness of the first accommodating chamber 111.

[0071] In other embodiments, a seal 160 may be disposed between the bone conduction speaker 200 and the partition wall 150, surrounding the communication hole 113. One side of the seal 160 abuts against the partition wall 150 and surrounds the communication hole 113, while the other side abuts against a wall of the bone conduction speaker 200, thereby enabling the bone conduction speaker 200 to block the communication hole 113. The seal 160 disposed between the bone conduction speaker 200 and the partition wall 150 can further enhance the airtightness of the first accommodating chamber 111, thereby improving the bone conduction effect.

[0072] In some embodiments, the sealing member 160 may include at least one of a sealant and a sealing rubber ring. If the sealing member 160 is a sealant, the sealant can be applied to the partition wall 150 outside the communication hole 113 by dispensing, and the bone conduction speaker 200 is then pressed against the sealant and the partition wall 150, thereby sealing the communication hole 113. The sealing rubber ring also has good sealing properties, so providing a sealing rubber ring between the partition wall 150 and the bone conduction speaker 200 can also improve the sealing properties of the first accommodating chamber 111. Of course, in other embodiments, the sealing member 160 can also be other components such as a sealing pad, soft filler, etc., which will not be specifically listed here in this embodiment.

[0073] In some embodiments, as Figure 3a 、 Figure 4 and Figure 5a As shown, the housing assembly 100 can be provided with a support wall 101 in the first accommodating cavity 111. The support wall 101 and the partition wall 150 together enclose a limited space 102. The bone conduction speaker 200 can be disposed in the limited space 102 and abut against the support wall 101. The support wall 101 and the partition wall 150 can be used to cooperate in limiting the movement of the bone conduction speaker 200 relative to the housing assembly 100 in the radial direction.

[0074] Specifically, the direction in which the bone conduction speaker 200 vibrates relative to the housing assembly 100 can be the axial direction of the bone conduction speaker 200, and the direction perpendicular to the axial direction of the bone conduction speaker 200 is the radial direction of the bone conduction speaker 200. The support wall 101 and the partition wall 150 can be used to cooperate to limit the movement of the bone conduction speaker 200 relative to the housing assembly 100 in any radial direction perpendicular to the axial direction. Figure 3a In the two directions in which the X-ray extends, the radial direction of the bone conduction speaker 200 can be Figure 3a as well as Figure 4 The two directions in which the center Y line extends, but the radial direction is not limited to the direction specifically shown in Y.

[0075] Optionally, one end of the support wall 101 may be connected to the first housing 120 or the second housing 130, and the other end may extend toward the bone conduction speaker 200. The support wall 101 is adapted to correspond to the outer surface of the bone conduction speaker 200 so that the support wall 101 fits against the bone conduction speaker 200 in the radial direction of the bone conduction speaker 200. This allows the support wall 101 and the partition wall 150 to cooperate in limiting radial movement of the bone conduction speaker 200 relative to the housing assembly 100, thereby limiting the movement of the bone conduction speaker 200 to the axial direction of the bone conduction speaker 200 and further enhancing the compactness of the internal structure of the speaker assembly 10.

[0076] In some embodiments, as Figure 3a As shown, the bone conduction speaker 200 may have a first central axis X and may be configured to generate vibrations in the direction of the first central axis X. The bone conduction speaker 200 may have a peripheral side surface 201 disposed around the first central axis X, and the peripheral side surface 201 may block the communication hole 113. The two directions indicated by the first central axis X may also be the axial direction of the bone conduction speaker 200. The bone conduction speaker 200 generates vibrations in the direction of the first central axis X and transmits sound to the user via bone conduction vibration.

[0077] Optionally, the circumferential side surface 201 of the bone conduction speaker 200 may abut against the support wall 101, and the support wall 101 and the partition wall 150 may cooperate to act on the circumferential side surface 201 of the bone conduction speaker 200 to limit the radial movement of the bone conduction speaker 200 relative to the housing assembly 100.

[0078] In some embodiments, as Figure 3a and Figure 4 As shown, the air conduction speaker 300 has a second central axis Y and is configured to generate vibration in the direction of the second central axis Y.

[0079] Optionally, the first central axis X and the second central axis Y may be perpendicular to each other, and the direction of the first central axis X may be the axial direction of the bone conduction speaker 200 , and the direction of the second central axis Y may be a radial direction perpendicular to the axial direction of the bone conduction speaker 200 .

[0080] Alternatively, as Figure 3a 、 Figure 4 as well as Figure 6 As shown, the housing assembly 100 may have a first side 103, a second side 104, and a third side 105. The first side 103 and the second side 104 are arranged opposite each other in a direction perpendicular to the first central axis X and the second central axis Y. The third side 105 is arranged adjacent to the first side 103 and the second side 104. Optionally, the first central axis X or the second central axis Y may pass through the third side 105. One pressure relief hole 115 may be provided on the first side 103 or the second side 104, and another pressure relief hole 115 may be provided on the third side 105.

[0081] For example, in some embodiments, the first central axis X may pass through the third side 105. The housing assembly 100 has a face-contacting side for transmitting bone-conducted vibrations to the user's face, and the third side 105 is disposed opposite the face-contacting side. In other embodiments, the second central axis Y passes through the third side 105. The third side 105 is located opposite the side of the housing assembly 100 where the sound outlet 114 is located.

[0082] The provision of multiple pressure relief holes 115 can increase the pressure relief area of ​​the second accommodating chamber 112 to the external environment, and can allow air to circulate quickly between the external environment and the second accommodating chamber 112. The air in the acoustic sound cavity of the second accommodating chamber 112 can be further quickly discharged to the external environment, thereby reducing the damping of the operation of the air conduction speaker 300 due to the difficulty of air flow, thereby minimizing the possibility that the second accommodating chamber 112 cannot be pressure-relieved after one pressure relief hole 115 is blocked, thereby affecting the vibration sound waves of the air conduction speaker 300.

[0083] In some embodiments, different pressure relief holes 115 can be disposed on different sides of the housing assembly 100. For example, the pressure relief holes 115 can be disposed on the first side 103 or the second side 104 at positions corresponding to the second sub-cavity 1122, and on the third side 105 at positions corresponding to the second sub-cavity 1122, so that the pressure relief holes 115 communicate with the second sub-cavity 1122. Furthermore, such an arrangement can increase the pressure relief area while reducing the probability of interference between the sounds emitted by the various pressure relief holes 115, particularly the probability of constructive interference, thereby improving the sound quality and reducing the impact on the sound emitted by the sound outlet 114.

[0084] In some embodiments, as Figure 6 As shown, the housing assembly 100 can be provided with an outwardly protruding body ridge 106 on the third side 105, wherein another pressure relief hole 115 extends through the body ridge 106 to connect to the external environment. When the earphone 1 is worn, the sound outlet 114 is generally oriented toward the user's ear canal, and the bone conduction side of the bone conduction speaker 200 is generally in close contact with the skin near the ear canal. Therefore, the direction of the sound outlet 114 and the bone conduction side intersect to form an acute angle, and the housing assembly 100 forms an outwardly protruding body ridge 106 on the side away from the human skin.

[0085] Optionally, the body edge 106 can be located on the first housing 120 and correspond to the position of the second accommodating cavity 112, so that the pressure relief hole 115 located on the body edge 106 can communicate with the second accommodating cavity 112. Providing another pressure relief hole 115 at the position of the body edge 106 can prevent this pressure relief hole 115 from being easily covered when the earphones 1 are worn, thereby ensuring air circulation in the pressure relief hole 115. Of course, in other embodiments, the body edge 106 of the third side 105 can also be recessed toward the interior of the housing assembly 100.

[0086] In some embodiments, as Figure 4 、 Figure 5a as well as Figure 7 As shown, in the vertical direction Z of the first central axis X and the second central axis Y, the first accommodating cavity 111 can have a first bottom wall 1111 and a second bottom wall 1112 arranged opposite to each other, and the second accommodating cavity 112 can have a third bottom wall 1123 and a fourth bottom wall 1124 arranged opposite to each other. The first bottom wall 1111 and the third bottom wall 1123 can be arranged adjacent to each other, and the second bottom wall 1112 and the fourth bottom wall 1124 can be arranged adjacent to each other. The vertical direction Z has a positive direction from the first bottom wall 1111 surface to the second bottom wall 1112 surface and a reverse direction opposite to the positive direction. The positive direction is as shown in FIG. Figure 3a as well as Figure 7 Indicated by the Z arrow.

[0087] Optionally, the peripheral side surface 201 of the bone conduction speaker 200 can abut against the first bottom wall 1111. The first bottom wall 1111, the support wall 101 and the partition wall 150 are together arranged to form a limited space 102. The bone conduction speaker 200 can be set in the limited space 102 and abut against the support wall 101 and the first bottom wall 1111.

[0088] In the positive direction, the lowest position of the first bottom wall 1111 may be higher than the lowest position of the third bottom wall 1123 .

[0089] In some embodiments, as Figure 4 As shown, the housing assembly 100 has a wall portion 1101 adjacent to the first accommodating cavity 111 in a vertical direction, and the pressure relief hole 115 is opened in the wall portion 1101 .

[0090] Specifically, the pressure relief hole 115 is provided in the wall portion 1101 between the first bottom wall 1111 and the third bottom wall 1123, thereby fully utilizing the available space within the housing assembly 100 and improving the space utilization of the speaker assembly 10. Furthermore, by setting the lowest position of the first bottom wall 1111 higher than the lowest position of the third bottom wall 1123, the first bottom wall 1111 and the third bottom wall 1123 can be staggered in height in the positive direction of the vertical direction Z. The wall portion 1101 between the first and third bottom walls provides a larger space for arranging the pressure relief hole 115, thereby allowing the pressure relief hole 115 to be larger in size, thereby increasing the size of the pressure relief hole 115 and improving the pressure relief effect.

[0091] In some embodiments, as Figures 4 to 5a As shown, the pressure relief hole 115 can be arranged in a trumpet-like shape extending from the second accommodating space 110 toward the outside of the housing assembly 100 in the wall portion 1101. Furthermore, the portion of the hole wall of the pressure relief hole 115 near the third bottom wall 1123 can be gradually inclined in the opposite direction toward the side where the third bottom wall 1123 is located. This arrangement can further increase the size of the pressure relief hole 115, facilitate pressure relief through the pressure relief hole 115, and enhance the sound quality of the speaker assembly 10.

[0092] In some embodiments, as Figure 3a as well as Figure 7 As shown, the first central axis X and the second central axis Y may be skew lines, and in a direction Z perpendicular to the first central axis X and the second central axis Y, the first central axis X and the second central axis Y are staggered with each other.

[0093] The bone conduction speaker 200 vibrates along the direction of the first central axis X, and the air conduction speaker 300 vibrates along the direction of the second central axis Y. Therefore, setting the first central axis X and the second central axis Y as skew lines and staggered with each other can reduce mutual interference between the bone conduction speaker 200 and the air conduction speaker 300 during vibration, thereby improving the effect of both generating and conducting sound.

[0094] For example, in some embodiments, Figure 7 As shown, the first central axis X can be set higher than the second central axis Y in the positive direction, and the lowest position of the first bottom wall 1111 can be conveniently set higher than the lowest position of the third bottom wall 1123, thereby facilitating the formation of the trumpet-shaped pressure relief hole 115, and the size of the trumpet-shaped pressure relief hole 115 can be set larger.

[0095] In some embodiments, as Figure 7 As shown, the distance P between the first central axis X and the second central axis Y can be 0.2 to 0.8 mm. Figure 5a For example, the distance P between the first central axis X and the second central axis Y may be 0.3, 0.5 or 0.7.

[0096] Optionally, in the positive direction, the first central axis X is higher than the second central axis Y. By setting the distance between the first central axis X and the second central axis Y in this manner, the lowest position of the first bottom wall 1111 can be higher than the lowest position of the third bottom wall 1123, while the size of the speaker assembly 10 can be controlled and reduced.

[0097] In some embodiments, as Figure 8 as well as Figure 9 As shown, the bone conduction speaker 200 may include a cylindrical housing 210 extending along a first central axis X, a voice coil assembly 221, a magnet assembly 222, and a vibration transmission piece 223. The voice coil assembly 221 and the magnet assembly 222 may be disposed within a cylindrical space of the cylindrical housing 210. The vibration transmission piece 223 may be fixedly connected to a first one of the magnet assembly 222 and the voice coil assembly 221 and the cylindrical housing 210. The magnet assembly 222 and the second one of the voice coil assembly 221 are fixedly connected to the cylindrical housing 210. The cylindrical housing 210 blocks the communication hole 113.

[0098] The magnet assembly 222 is configured to generate vibrations when current passes through the voice coil assembly 221, interacting with the magnetic field of the voice coil assembly 221 to convert the sound-related current signal into a vibration signal. The voice coil assembly 221 is configured to generate an electrical signal when current passes through it, interacting with the magnetic field of the magnet assembly 222, thereby causing the magnet assembly 222 to vibrate. The cylindrical cover 210 may be a magnetically conductive cover that can be used to constrain the direction of the magnetic field of the magnet assembly 222. The cylindrical cover 210 can also be configured to contact the housing assembly 100. When the voice coil assembly 221 vibrates, the voice coil assembly 221 can drive the cylindrical cover 210 to vibrate, thereby transmitting the vibration signal to the housing assembly 100 via the cylindrical cover 210. The vibration transmission plate 223 is configured to elastically connect the voice coil assembly 221 and the magnet assembly 222 to elastically constrain the relative movement of the voice coil assembly 221 and the magnet assembly 222 along the first central axis X.

[0099] In some embodiments, as Figures 10 and 11 As shown, the air conduction speaker 300 may include a diaphragm 310 and a driving mechanism 320. The driving mechanism 320 may be connected to the diaphragm 310, and an internal sound cavity 330 may be defined between the diaphragm 310 and the driving mechanism 320. The driving mechanism 320 is configured to drive the diaphragm 310 to vibrate under the control of an electrical signal, thereby vibrating the air in the internal sound cavity 330 of the air conduction speaker 300 and generating sound waves.

[0100] There are many ways to arrange the air conduction speaker 300 within the second accommodating chamber 112. For example, the internal sound chamber 330 can be connected to the second sub-chamber 1122 to connect to the pressure relief hole 115, or the internal sound chamber 330 can be connected to the first sub-chamber 1121. Two of these arrangements are illustrated below.

[0101] The first way: the diaphragm 310 may be closer to the communication hole 113 than the driving mechanism 320 . The diaphragm 310 and the communication hole 113 are arranged opposite to each other and face the second sub-cavity 1122 . The first sub-cavity 1121 may be connected to the internal sound cavity 330 .

[0102] When the drive mechanism 320 drives the diaphragm 310 to vibrate, the diaphragm 310 moves closer to the connecting hole 113, and therefore closer to the bone conduction speaker 200. On the one hand, because the diaphragm 310 has a larger radial dimension than the drive mechanism 320, placing the larger diaphragm 310 closer to the bone conduction speaker 200 and the smaller drive mechanism 320 closer to the outside effectively reduces the volume of the housing assembly 100 near the outside, making the volume and size of the speaker assembly 10 more compact and reasonable, and improving the utilization of the internal space of the speaker assembly 10. On the other hand, the diaphragm 310 is positioned opposite the connecting hole 113 and toward the second sub-cavity 1122, effectively increasing the volume of the second sub-cavity 1122. The air within the second sub-cavity 1122 is effectively conducted out of the body through the pressure relief hole 115, thereby improving the pressure relief effect.

[0103] The second way: the diaphragm 310 may be further away from the communication hole 113 than the driving mechanism 320 . The diaphragm 310 may face away from the communication hole 113 and toward the first sub-cavity 1121 . The second sub-cavity 1122 is connected to the internal sound cavity 330 .

[0104] By positioning the diaphragm 310 away from the communicating hole 113 and toward the first sub-cavity 1121, the sound waves generated by the diaphragm 310 can be easily transmitted to the first sub-cavity 1121. Furthermore, the presence of the communicating hole 113 and the second sub-cavity 1122 effectively increases the internal sound cavity 330, and pressure is released through the pressure relief hole 115, effectively improving the pressure relief effect.

[0105] In some embodiments, as Figures 10 and 11 As shown, the driving mechanism 320 may include a voice coil 321 and a magnetic circuit assembly 322. The magnetic circuit assembly 322 includes a housing 3222 having an open end 3221 and an annular flange 3223 disposed at the open end 3221 of the housing 3222 and protruding from the outer circumference of the housing 3222. The magnetic circuit assembly 322 is configured to interact with the voice coil 321 to generate vibrations, and the voice coil 321 is configured to drive the magnetic circuit assembly 322 to vibrate when current passes through the voice coil 321 and interacts with the magnetic field of the magnetic circuit assembly 322.

[0106] The edge of the diaphragm 310 can be fixed to the annular flange 3223. The voice coil 321 can be connected to the side of the diaphragm 310 facing the magnetic circuit assembly 322. An internal sound cavity 330 can be enclosed between the diaphragm 310 and the magnetic circuit assembly 322. The diaphragm 310 can be located on the side of the cover 3222 away from the sound outlet 114 and facing the connecting hole 113, and the first sub-cavity 1121 is connected to the internal sound cavity 330. The first sub-cavity 1121 is connected to the internal sound cavity 330 so that the sound waves generated by the vibration of the air inside the internal sound cavity 330 can be transmitted outside the speaker assembly 10 through the first sub-cavity 1121 and the sound outlet 114.

[0107] Optionally, the annular flange 3223 can be arranged on the side away from the sound outlet 114, and the diaphragm 310 can be arranged on the side away from the sound outlet 114. In this way, the diaphragm 310 and the annular flange 3223 can be closer to the interior of the shell assembly 100, so that the air conduction speaker 300 has a diaphragm 310 with a larger radial size and the annular flange 3223 is arranged away from the sound outlet 114, while the smaller part of the air conduction speaker 300 can be close to the sound outlet 114. Compared with the structure of the traditional speaker diaphragm 310 that must face the sound outlet 114, this reverse setting structure of the air conduction speaker 300 can effectively make the size of the part of the shell of the shell assembly 100 close to the sound outlet 114 smaller, so that the size of the shell assembly 100 from the middle area to the part of the sound outlet 114 can be reduced (that is, the radial size of the outer peripheral surface of the shell assembly 100 can be gradually reduced), thereby making the structure more compact, effectively improving the space utilization of the shell assembly 100, and reducing the overall volume of the entire shell assembly 100. Moreover, this reverse setting structure can optimize the sound output path, thereby improving the sound quality. Simply put, the air conduction speaker 300 is reversed along the air conduction vibration direction, thereby effectively reducing the structural size of the shell assembly 100.

[0108] In the speaker assembly 10, if the sound outlet 114 and the pressure relief hole 115 are located relatively close to each other, the sound waves generated by the pressure relief hole 115 and the sound outlet 114 will affect each other, potentially causing interference in the near field. The low-frequency sound waves transmitted by the sound outlet 114 are easily weakened by the anti-phase interference of the sound waves released when the pressure relief hole 115 is released, thereby causing sound cancellation. The relevant technical means for the pressure relief hole 115 and the sound outlet 114 are further described in the following embodiments.

[0109] The following is an exemplary description of earphones 1 according to another embodiment.

[0110] As mentioned above, the housing assembly 100 may define an accommodating space 110 . The air conduction speaker 300 is disposed in the accommodating space 110 . The bone conduction speaker 200 is disposed in the accommodating space 110 .

[0111] Optionally, the bone conduction speaker 200 has a first central axis X and can vibrate along the first central axis X. The air conduction speaker 300 has a second central axis Y and can vibrate along the second central axis Y. Specifically, the voice coil and diaphragm of the air conduction speaker 300 vibrate along the second central axis Y.

[0112] The housing assembly 100 further defines a sound outlet 114 and a pressure relief hole 115, which communicate with the accommodating space 110. These holes 114 and 115 are each used to conduct a portion of the sound waves generated by the air conduction speaker 300 to the external environment. The pressure relief hole 115 and the sound outlet 114 may be located on opposite sides of the housing assembly 100.

[0113] like Figures 12 to 13 As shown, the housing assembly 100 may include a first housing 120, a second housing 130, and a third housing 140. The first housing 120, the second housing 130, and the third housing 140 may be collectively arranged to form an accommodating space 110. Optionally, the second housing 130 may be connected to the first housing 120 along the direction of the first central axis X, and the third housing 140 may be connected to the second housing 130 along the direction of the second central axis Y. Optionally, the sound outlet 114 may be provided in the third housing 140, and the pressure relief hole 115 may be provided in a portion of the first housing 120 facing away from the third housing 140, so that the sound outlet 114 and the pressure relief hole 115 are respectively located on two opposite side surfaces of the housing assembly 100.

[0114] By arranging the sound hole 114 and the pressure relief hole 115 on two opposite side surfaces of the shell assembly 100, compared with arranging the sound hole 114 and the pressure relief hole 115 on other adjacent or identical side surfaces of the shell assembly 100, the distance between the sound hole 114 and the pressure relief hole 115 can be increased, so as to reduce the mutual influence between the sound hole 114 and the pressure relief hole 115, reduce the interference and cancellation between the sound hole 114 and the pressure relief hole 115 in the near field, and weaken the sound waves transmitted by the sound hole 114, thereby reducing the sound cancellation phenomenon between the two, improving the low-frequency effect of the speaker assembly 10, and thus improving the sound quality of the earphone 1.

[0115] In some embodiments, as Figures 12 to 13 As shown, the speaker assembly 10 may be provided with a pressure relief channel 400 connected to the pressure relief hole 115. The sound outlet 114 may be connected to the accommodating space 110, and the pressure relief channel 400 is used to guide part of the sound waves generated by the air conduction speaker 300 in the accommodating space 110 to the pressure relief hole 115.

[0116] By providing a pressure relief channel 400 connecting the accommodating space 110 and the pressure relief hole 115, the required pressure relief air in the accommodating space 110 can be conveniently guided into the pressure relief channel 400 and further released through the pressure relief hole 115. This can extend the pressure relief path and improve the pressure relief effect. On the other hand, the connection of the pressure relief channel 400 to the pressure relief hole 115 can prevent the required pressure relief sound waves from affecting the operation of other components during the pressure relief process, thereby improving the sound quality of the speaker assembly 10. The provision of the pressure relief channel 400 can also achieve precise positioning of the pressure relief of the air conduction speaker 300, while reducing the mutual influence between the sound outlet hole 114 and the pressure relief hole 115, and improving the flexibility of the pressure relief of the air conduction speaker 300.

[0117] In some embodiments, the pressure relief channel 400 and the accommodating space 110 can be spaced apart from each other, and the pressure relief channel 400 can communicate with the accommodating space 110. Alternatively, the first housing 120 can be provided with the aforementioned pressure relief channel 400, one end of which communicates with the accommodating space 110, and the other end of which forms a pressure relief hole 115. Specifically, the pressure relief channel 400 and the accommodating space 110 can be spaced apart from each other, thereby allowing the pressure-relieving gas to be independently released and separated from other components within the accommodating space 110, thereby less likely to affect the components within the accommodating space 110. Furthermore, by providing the pressure relief channel 400 in the first housing 120, the distance between the pressure relief hole 115 and the sound outlet 114 can be increased. Furthermore, when assembling the first, second, and third housings 120, 130, and 140, the pressure relief channel 400 does not need to be separately installed, thereby improving assembly efficiency.

[0118] In some embodiments, as Figures 12 to 13 As shown, the accommodating space 110 may include a first accommodating chamber 111 and a second accommodating chamber 112 separated from each other, the bone conduction speaker 200 is arranged in the first accommodating chamber 111, the air conduction speaker 300 is arranged in the second accommodating chamber 112, the sound outlet 114 is connected to the second accommodating chamber 112, the pressure relief channel 400 is connected to the second accommodating chamber 112, and is spaced apart from the first accommodating chamber 111, and the pressure relief channel 400 is connected to the second accommodating chamber 112 and the pressure relief hole 115.

[0119] Optionally, the second shell 130 and the first shell 120 are connected to each other in cooperation to form the first accommodating cavity 111 , and the third shell 140 and the first shell 120 are connected to each other in cooperation to form the second accommodating cavity 112 .

[0120] Because the bone conduction speaker 200 and the air conduction speaker 300 operate on different principles, the separation of the first and second accommodating chambers 111, 112, and the pressure relief passage 400 ensures the independence of the bone conduction speaker 200, minimizes the impact of the air conduction speaker 300 on the bone conduction speaker 200, and protects the bone conduction speaker 200 to a certain extent. During operation of the earphone 1, the sound waves generated by the air conduction speaker 300 through the air vibration principle can propagate out of the speaker assembly 10 through the sound outlet 114 and into the user's ear canal. Therefore, connecting the second accommodating chamber 112, where the air conduction speaker 300 is located, to the external environment through the pressure relief passage 115 allows air to flow freely between the second accommodating chamber 112 and the air conduction speaker 300, preventing the air in the second accommodating chamber 112 from damping the vibration of the air conduction speaker 300 and affecting the sound quality produced by the air conduction speaker 300.

[0121] In some embodiments, the first accommodating chamber 111 and the second accommodating chamber 112 can be isolated from each other. Specifically, the area of ​​the connection between the first accommodating chamber 111 and the external environment can be smaller than the area of ​​the connection between the second accommodating chamber 112 and the external environment, as well as the area of ​​the connection between the pressure relief passage 400 and the external environment. In other words, the airtightness of the first accommodating chamber 111 is stronger than that of the second accommodating chamber 112 and the pressure relief passage 400. The term "airtightness" can be understood as the airtightness of the cavity space.

[0122] Since the bone conduction speaker 200 requires a highly sealed environment to ensure the bone conduction effect, the bone conduction speaker 200 and the air conduction speaker 300 are independently set in two different cavities in the accommodating space 110 to effectively reduce the mutual interference between the bone conduction speaker 200 and the air conduction speaker 300, and the bone conduction speaker 200 is placed in the first accommodating cavity 111 with stronger sealing, which can also effectively enhance the sound quality effect produced by the bone conduction speaker 200.

[0123] Optionally, in a direction perpendicular to the arrangement direction of the first accommodating chamber 111 and the second accommodating chamber 112, the pressure relief channel 400 and the first accommodating chamber 111 are spaced apart. Figures 12 to 13 As shown, the arrangement direction of the first accommodating cavity 111 and the second accommodating cavity 112 can be consistent with the direction of the second central axis Y of the air conduction speaker 300, and can be Figure 12 as well as Figure 13 In the direction indicated by the middle Y line, the vertical direction of the arrangement direction of the first accommodating cavity 111 and the second accommodating cavity 112 is as shown in FIG. Figure 12 as well as Figure 13 Indicated by the Z arrow.

[0124] Optionally, the length component of the extended length of the pressure relief channel 400 along the arrangement direction is greater than the length component thereof along the vertical direction. This arrangement can make the pressure relief channel 400 occupy a smaller dimension in the vertical direction, thereby reducing the vertical dimension of the speaker assembly 10, and can make the distance between the sound outlet 114 and the pressure relief hole 115 larger, so as to reduce the mutual influence between the sound outlet 114 and the pressure relief hole 115 in the near field. Among them, the length component of the extended length of the pressure relief channel 400 along the arrangement direction is as follows: Figure 13 As shown in the length E, the length component of the pressure relief channel 400 in the vertical direction is as follows Figure 11 As shown in the middle length F, E>F.

[0125] In some embodiments, as Figures 12 to 13 As shown, the shell assembly 100 may be provided with a first partition wall 170 between the first accommodating chamber 111 and the second accommodating chamber 112, and a second partition wall 180 between the pressure relief channel 400 and the first accommodating chamber 111. The first partition wall 170 can separate the second accommodating chamber 112 from the first accommodating chamber 111. The second partition wall 180 can be used to separate the pressure relief channel 400 from the first accommodating chamber 111. In this way, an independent pressure relief channel 400 and the first accommodating chamber 111 can be formed. On the one hand, the existence of the pressure relief channel 400 can extend the pressure relief path, increase the size of the pressure relief space, improve the pressure relief effect, and thus improve the sound quality. On the other hand, the working processes of the air conduction speaker 300 and the bone conduction speaker 200 can not interfere with each other, reduce the mutual influence between the two, and ensure the sound quality output effect of each.

[0126] Optionally, one end of the second partition wall 180 may be connected to the first shell 120 , and the other opposite end may be connected to the first partition wall 170 , so that the pressure relief channel 400 and the first accommodating chamber 111 can be spaced apart in the vertical direction.

[0127] Alternatively, as Figure 13 As shown, the first partition wall 170 can further extend to between the second accommodating chamber 112 and the pressure relief channel 400, and the first partition wall 170 can be provided with a sound-introducing hole 173, which connects the second accommodating chamber 112 and the pressure relief channel 400. The pressure relief hole 115 is connected to the second accommodating chamber 112 through the pressure relief channel 400 and the sound-introducing hole 173. When the earphone 1 is working, part of the sound waves generated by the air conduction speaker 300 that need to be relieved can be transmitted out of the speaker assembly 10 through the second accommodating chamber 112, the sound-introducing hole 173, the pressure relief channel 400, and the pressure relief hole 115 in sequence, thereby preventing the air in the second accommodating chamber 112 from damping the vibration of the air conduction speaker 300 and affecting the sound quality effect produced by the air conduction speaker 300.

[0128] In some embodiments, as Figure 13As shown, the housing assembly 100 may define a first communication hole 172 between the first accommodating chamber 111 and the second accommodating chamber 112. The first communication hole 172 may connect the first accommodating chamber 111 with the second accommodating chamber 112. The bone conduction speaker 200 may block the first communication hole 172 to isolate the first accommodating chamber 111 from the second accommodating chamber 112.

[0129] Disposing a first communication hole 172 between the first accommodating chamber 111 and the second accommodating chamber 112 and using the bone conduction speaker 200 to block the first communication hole 172 on one side of the first communication hole 172 can expand the usable space of the first accommodating chamber 111 while ensuring the strong sealing of the second accommodating chamber 112. This effectively improves the ease of assembly of the air conduction speaker 300 and the reliability of the structural setup. Furthermore, the volume of the sound cavity formed by the air conduction speaker 300 in the second accommodating chamber 112 can be simply and effectively expanded, thereby improving the sound output effect and sound quality of the air conduction speaker 300. In other words, while maintaining the same sound cavity volume, the air conduction speaker 300 can be placed closer to the bone conduction speaker 200, reducing the size of the speaker assembly 10 and achieving a more compact overall size.

[0130] In some embodiments, as Figure 13 As shown, the shell assembly 100 can be provided with a second connecting hole 181 between the first accommodating chamber 111 and the pressure relief channel 400. The second connecting hole 181 can connect the first accommodating chamber 111 and the pressure relief channel 400. The bone conduction speaker 200 blocks the second connecting hole 181 to isolate the first accommodating chamber 111 and the pressure relief channel 400 from each other.

[0131] Similarly, a second connecting hole 181 is provided to connect the first accommodating chamber 111 and the pressure relief channel 400, and a bone conduction speaker 200 is provided to block the second connecting hole 181. This can increase the area of ​​the pressure relief channel 400 while ensuring the strong airtightness of the first accommodating chamber 111, so that the pressure relief channel 400 has a larger space for pressure relief, thereby improving the pressure relief effect, or the pressure relief channel 400 can be brought closer to the first accommodating chamber 111 while ensuring the area size, thereby reducing the size of the speaker assembly 10 in the vertical direction.

[0132] Of course, in other embodiments, the pressure relief channel 400 can be configured in other forms. Other forms of the pressure relief channel 400 are exemplarily described below.

[0133] In some embodiments, as Figure 14As shown, the speaker assembly 10 includes a channel tube 500 formed with a pressure relief channel 400. The channel tube 500 is fixedly arranged on the shell assembly 100 and is located in the first accommodating cavity 111. One end of the channel tube 500 is connected to the second accommodating cavity 112, and the other end is connected to the pressure relief hole 115.

[0134] Optionally, a first partition wall 170 may be provided between the first accommodating chamber 111 and the second accommodating chamber 112 to separate the second accommodating chamber 112 from the first accommodating chamber 111. One end of the channel tube 500 may be connected to the first partition wall 170 to communicate with the second accommodating chamber 112, while the other end may communicate with the pressure relief hole 115 in the first housing 120, thereby connecting the second accommodating chamber 112 to the external environment. Optionally, the bone conduction speaker 200 may be arranged vertically spaced apart from the channel tube 500.

[0135] The channel tube 500 is disposed within the first accommodating chamber 111 and is isolated from and disconnected from the first accommodating chamber 111. Specifically, the portion of the channel tube 500 that communicates with the second accommodating chamber 112 is sealed relative to the first accommodating chamber 111, and the portion of the channel tube 500 that communicates with the pressure relief hole 115 is also sealed relative to the first accommodating chamber 111. Specifically, the channel tube 500 is sealedly connected to the first housing 120 within the first accommodating chamber 111 and is disconnected from the first accommodating chamber 111. This ensures a strong seal within the first accommodating chamber 111, thereby ensuring the bone conduction effect of the bone conduction speaker 200.

[0136] In other embodiments, Figure 15 As shown, part of the accommodating space 110 may be formed as a pressure relief channel 400 .

[0137] Optionally, the bone conduction speaker 200 can be configured as a sealed structure, with its interior isolated from the accommodating space 110. A pressure relief channel 400 can be formed between the bone conduction speaker 200 and the inner wall of the accommodating space 110. Because the bone conduction speaker 200 is a sealed structure, it can be largely protected from the effects of moisture in the accommodating space 110. This also allows the bone conduction speaker 300 to adapt to non-sealed environments, achieving a good bone conduction effect without requiring strong airtightness.

[0138] Alternatively, as Figure 15As shown, the housing space 110 may include a first housing chamber 111 and a second housing chamber 112 spaced apart from each other. The bone conduction speaker 200 may be disposed in the first housing chamber 111 and may define a pressure relief passage 400 between the speaker and the inner wall of the first housing chamber 111. The air conduction speaker 300 may be disposed in the second housing chamber 112. The housing assembly 100 defines a sound introduction hole 173 between the first housing chamber 111 and the second housing chamber 112, connecting the first housing chamber 111 with the second housing chamber 112.

[0139] Specifically, the pressure relief hole 115 is provided on the first housing 120 and communicates with the first accommodating chamber 111. Therefore, the sound waves generated by the air conduction speaker 300 that need to be discharged can be discharged out of the speaker assembly 10 through the second accommodating chamber 112, the sound guide hole 173, the first accommodating chamber 111 (i.e., the pressure relief channel 400), and the pressure relief hole 115 in sequence.

[0140] In this way, by forming a pressure relief channel 400 by the bone conduction speaker 200 and the inner wall of the first accommodating chamber 111, the internal structure of the first accommodating chamber 111 can be simplified, the size of the first accommodating chamber 111 can be reduced, and the structure of the speaker assembly 10 can be made more compact. In addition, by forming a pressure relief channel by the first accommodating chamber 111 and the bone conduction speaker 200, the space utilization rate of the first accommodating chamber 111 can be improved, and the space of the first accommodating chamber 111 can be fully utilized to increase the size of the pressure relief channel 400, thereby improving the pressure relief effect and improving the sound quality of the air conduction speaker 300.

[0141] In some embodiments, as Figures 8 and 9 As shown, the bone conduction speaker 200 may include a cylindrical housing 210, a drive assembly 220, and two sealing plates 230. The cylindrical housing 210 may be fixedly connected to the housing assembly 100. The drive assembly 220 is disposed within the cylindrical housing 210 and is configured to drive the cylindrical housing 210 to vibrate, thereby driving the housing assembly 100 to vibrate. The two sealing plates 230 may be disposed at either end of the cylindrical housing 210 and seal the cylindrical housing 210 to form a sealed structure.

[0142] Optionally, the drive assembly 220 is disposed between the two sealing plates 230, and the drive assembly 220 and the two sealing plates 230 are arranged in sequence in the direction of the first central axis X. The drive assembly 220 is configured to generate vibrations in the direction of the first central axis X in response to the current signal, thereby driving the cylindrical cover 210 and the housing assembly 100 to vibrate, thereby transmitting the vibration signal to a human body in contact with the housing assembly 100, thereby achieving a bone conduction function.

[0143] By providing two sealing plates 230 to seal the cylindrical housing 210, the bone conduction speaker 200 achieves a sealed structure, reducing interference from external moisture and dust. This also makes the structure of the bone conduction speaker 200 more integrated and compact. Optionally, the sealing plates 230 can be configured as magnetically conductive plates to suppress magnetic flux leakage from the driver assembly 220, thereby increasing the magnetic field strength within the cylindrical housing 210.

[0144] In some embodiments, as Figures 8 and 9 As shown, the bone conduction speaker 200 may further include a vibration transmitting plate 223. The driving assembly 220 may further include a voice coil assembly 221 and a magnet assembly 222. The voice coil assembly 221 may be sleeved on the magnet assembly 222. The vibration transmitting plate 223 may be fixedly connected to the cylindrical housing 210 and one of the voice coil assembly 221 and the magnet assembly 222. The other of the voice coil assembly 221 and the magnet assembly 222 may be fixedly connected to the cylindrical housing 210.

[0145] The magnet assembly 222 is configured to generate vibrations when current passes through the voice coil assembly 221, causing its magnetic field to interact with the voice coil assembly 221, thereby converting the sound-related current signal into a vibration signal. The voice coil assembly 221 is configured to generate an electrical signal when current passes through, which interacts with the magnetic field of the magnet assembly 222, thereby generating vibrations. The cylindrical cover 210 is configured to constrain the direction of the magnetic field of the magnet assembly 222. The cylindrical cover 210 is also configured to contact the housing assembly 100, and when the voice coil assembly 221 vibrates, the voice coil assembly 221 can drive the cylindrical cover 210 to vibrate, thereby transmitting the vibration signal to the housing assembly 100 through the cylindrical cover 210. The vibration transmission plate 223 is configured to elastically connect the voice coil assembly 221 and the magnet assembly 222 to elastically constrain the relative movement of the voice coil assembly 221 and the magnet assembly 222 along the direction of the first central axis X.

[0146] The following embodiments further exemplarily describe the sealing structure of the bone conduction speaker 200 .

[0147] See also Figure 3a The bone conduction speaker 200 is disposed within the accommodation space 110 and is connected to the housing assembly 100. Specifically, when the earphone 1 is in use, the housing assembly 100 conforms to the user's body, and the bone conduction speaker 200 is used to drive the housing assembly 100 to vibrate through bone conduction vibration, thereby transmitting sound to the user.

[0148] In some embodiments, as Figures 8 and 9As shown, the bone conduction speaker 200 may include a cylindrical housing 210, a driver assembly 220, and two sealing plates 230. The cylindrical housing 210 may define a receiving space 211. The driver assembly 220 may be disposed within the receiving space 211 and connected to the cylindrical housing 210. The two sealing plates 230 may be disposed at either end of the cylindrical housing 210 to seal the receiving space 211.

[0149] The drive assembly 220 can be used to convert current signals into vibration signals, so that when the bone conduction speaker 200 is in use, the drive assembly 220 can generate vibrations and drive the cylindrical cover 210 to vibrate. The two sealing plates 230 seal the ends of the cylindrical cover 210, forming a sealed space in the storage space 211 where the drive assembly 220 is located. This limits the drive assembly 220 and prevents it from falling out of the cylindrical cover 210. Furthermore, sealing the cylindrical cover 210 with the two sealing plates 230 can prevent impurities such as dust and water droplets from entering the storage space 211 and affecting the vibration of the drive assembly 220, thereby ensuring the bone conduction effect of the bone conduction speaker 200 and extending the service life of the bone conduction speaker 200. This also makes the structure of the bone conduction speaker 200 more integrated and improves its compactness.

[0150] Optionally, the sealing plate 230 can be configured as a magnetic conductive plate to suppress magnetic flux leakage from the drive assembly 220, thereby increasing the magnetic field strength within the cylindrical housing 210. For example, the sealing plate 230 can be a steel plate. In some embodiments, the sealing plate 230 can also be an ordinary metal plate.

[0151] In some embodiments, as Figures 8 and 9 As shown, the bone conduction speaker 200 may further include a vibration transmitting plate 223, which connects the driving assembly 220 and the cylindrical cover 210. In the direction of the central axis of the cylindrical cover 210, the vibration transmitting plate 223 may be arranged between the driving assembly 220 and the sealing plate 230, and is arranged opposite to the sealing plate 230. Specifically, the central axis of the cylindrical cover 210 may coincide with the first central axis X of the bone conduction speaker 200. The central axis direction of the cylindrical cover 210 is as shown in FIG. Figure 8 and Figure 9 Indicated by the X arrow.

[0152] The vibration plate 223 is used to connect to the drive assembly 220 to limit the drive assembly 220. During vibration, the drive assembly 220 drives the vibration plate 223 to drive the cylindrical housing 210 to vibrate. Specifically, the sealing plate 230, the vibration plate 223, and the drive assembly 220 are arranged in sequence along the central axis of the cylindrical housing 210. The bone conduction speaker 200 can also vibrate in the direction of the central axis of the cylindrical housing 210, meaning that the drive assembly 220 also vibrates in the direction of the central axis of the cylindrical housing 210. This arrangement allows the sealing plate 230 and the vibration plate 223 to directly limit the drive assembly 220 in the direction of vibration during operation. The sealing plate 230 also limits the vibration plate 223, preventing excessive deformation of the vibration plate 223 during operation of the drive assembly 220, thereby increasing the service life of the vibration plate 223.

[0153] In some embodiments, as Figures 8 and 9 As shown, the two sealing plates 230 can be fixedly connected to the two ends of the cylindrical cover 210 , and the periphery of the vibration transmission piece 223 is fixed to the inner wall of the cylindrical cover 210 .

[0154] Alternatively, as Figures 8 and 9 As shown, at least one end of the cylindrical cover 210 can be stepped to form a first support surface 212 and a second support surface 213 with a stepped drop along the central axis. The second support surface 213 can be closer to the central axis of the cylindrical cover 210 than the first support surface 212. The sealing plate 230 is fixedly supported on the first support surface 212. The periphery of the vibration transmission plate 223 is fixedly supported on the second support surface 213.

[0155] Optionally, the first support surface 212 may be flush with a surface of the vibration transmitting plate 223 facing away from the second support surface 213. This allows the sealing plate 230, when fixedly supported on the first support surface 212, to press the vibration transmitting plate 223 against the second support surface 213, further securing the vibration transmitting plate 223 to the cylindrical housing 210. This arrangement makes the structure of the bone conduction speaker 200 more compact and facilitates assembly and installation.

[0156] The connection between the sealing plate 230 and the first supporting surface 212 can be sealed (for example, a sealant can be applied for fixation and sealing or it can be fixed and sealed by welding), and another sealing plate 230 arranged at the other end of the cylindrical cover body 210 can also be sealed with the cylindrical cover body 210, so that the cylindrical cover body 210 presents a closed structure.

[0157] In other embodiments, the vibration transmitting plate 223 may be fixedly connected to one end of the cylindrical cover 210 , and the sealing plate 230 may be fixedly stacked on a side of the vibration transmitting plate 223 away from the driving assembly 220 and spaced apart from the cylindrical cover 210 .

[0158] Specifically, in the axial direction of the cylindrical cover 210, the sealing plate 230, the vibration transmitting plate 223, and the cylindrical cover 210 are stacked in sequence. The periphery of the vibration transmitting plate 223 is fixedly connected to one end surface of the cylindrical cover 210. The sealing plate 230 is fixed to the vibration transmitting plate 223 and thus connected to the cylindrical cover 210 via the vibration transmitting plate 223. The connection between the vibration transmitting plate 223 and the cylindrical cover 210 and the connection between the sealing plate 230 and the vibration transmitting plate 223 are both sealed.

[0159] Of course, in other embodiments, the vibration transmission plate 223 and the sealing plate 230 can also be fixed relative to the cylindrical cover 210 in other ways. For example, the periphery of the vibration transmission plate 223 can be directly connected to the inner wall of the cylindrical cover 210, and the sealing plate 230 is fixedly supported on the first supporting surface 212 to cover one end of the sealing plate 230. This embodiment will not be listed in detail here.

[0160] In some embodiments, as Figures 8 and 9 As shown, there can be two vibration transmitting plates 223 , and the two vibration transmitting plates 223 can be fixedly connected to the cylindrical cover 210 respectively. The two sealing plates 230 can be arranged one by one on the side of the two vibration transmitting plates 223 away from the driving assembly 220 .

[0161] Specifically, the two vibration transmitting plates 223 and the two sealing plates 230 can be arranged in sequence along the central axis of the cylindrical cover 210. Furthermore, the two vibration transmitting plates 223 and the two sealing plates 230 can be located on either side of the drive assembly 220. The two vibration transmitting plates 223 connect the drive assembly 220 and the cylindrical cover 210 on either side of the drive assembly 220 to limit the drive assembly 220 on both sides of the drive assembly 220. The two sealing plates 230 can be respectively disposed on the side of the two vibration transmitting plates 223 away from the drive assembly 220 to protect the two vibration transmitting plates 223 and seal the accommodating space 211 of the cylindrical cover 210.

[0162] Providing two vibration-transmitting plates 223 can facilitate the driving component 220 to drive the cylindrical cover 210 to vibrate by driving the two vibration-transmitting plates 223 during the vibration process, thereby improving the bone conduction effect of the bone conduction speaker 300, thereby improving the sensitivity of the bone conduction speaker 300. In addition, limiting the driving component 220 can also share the pressure caused by the vibration of the driving component 220, thereby increasing the service life of the vibration-transmitting plates 223, and further increasing the service life of the bone conduction speaker 200.

[0163] Of course, in other embodiments, the number of vibration transmission piece 223 can be one, and the vibration transmission piece 223 can be disposed on one side of the cylindrical cover 210 and connected to the drive assembly 220, thereby limiting the drive assembly 220. Two sealing plates 230 can also be disposed on both sides of the cylindrical cover 210 and seal the receiving space 211 of the cylindrical cover 210. The vibration transmission piece 223 is located between the two sealing plates 230 so as to be located within the receiving space 211 of the cylindrical cover 210. Optionally, the sealing plate 230 on the side away from the vibration transmission piece 223 can be integrally formed with the cylindrical cover 210 to form a one-piece structure, thereby improving the airtightness of the receiving space 211.

[0164] In some embodiments, as Figures 8 and 9 As shown, the driving assembly 220 may further include a voice coil assembly 221 and a magnet assembly 222. The first of the voice coil assembly 221 and the magnet assembly 222 is disposed around the second of the voice coil assembly 221 and the magnet assembly 222, and the first of the voice coil assembly 221 and the magnet assembly 222 is fixedly connected to the cylindrical cover 210. A vibration transmission plate 223 is fixedly connected to the second of the voice coil assembly 221 and the magnet assembly 222 and the cylindrical cover 210. The vibration transmission plate 223 and the sealing plate 230 are disposed relative to each other in the direction of the central axis. The vibration transmission plate 223 is used to elastically constrain the voice coil assembly 221 and the magnet assembly 222 from relative movement along the central axis of the cylindrical cover 210. The voice coil assembly 221 is configured to receive current, and the current can form a current loop through the voice coil assembly 221. The magnet assembly 222 is configured to interact with the current in the voice coil assembly 221 to generate vibrations in the central axis direction. When vibrating, the magnet assembly 222 can directly or indirectly drive the cylindrical housing 210 to move. The magnet assembly 222 and the voice coil assembly 221 move relative to each other along the central axis direction of the cylindrical housing 210.

[0165] For example, Figure 8 and Figure 9 In the illustrated embodiment, the first of the voice coil assembly 221 and the magnet assembly 222 may be the voice coil assembly 221, and the second of the voice coil assembly 221 and the magnet assembly 222 may be the magnet assembly 222. Specifically, the voice coil assembly 221 is disposed on the inner wall of the cylindrical housing 210 and is fixedly connected to the cylindrical housing 210. The voice coil assembly 221 surrounds the magnet assembly 222, which is disposed within the accommodating space 211 of the cylindrical housing 210 and spaced apart from the voice coil assembly 221. A vibration transmission plate 223 is fixedly connected between the magnet assembly 222 and the cylindrical housing 210. The magnet assembly 222, the vibration transmission plate 223, the sealing plate 230, and the cylindrical housing 210 are sequentially arranged along the central axis of the cylindrical housing 210. When the magnet assembly 222 and the voice coil assembly 221 interact, the magnet assembly 222 drives the cylindrical housing 210 to vibrate via the vibration transmission plate 223.

[0166] Of course, in other embodiments, the first of the voice coil assembly 221 and the magnet assembly 222 can be the magnet assembly 222, and the second of the voice coil assembly 221 and the magnet assembly 222 can be the voice coil assembly 221. Specifically, the magnet assembly 222 can be fixedly attached to the inner wall of the cylindrical cover 210 and arranged to surround the voice coil assembly 221. The voice coil assembly 221 is connected to the cylindrical cover 210 via a vibration transmitting plate 223. The magnet assembly 222 and the voice coil assembly 221 interact with each other, and the magnet assembly 222 can directly drive the cylindrical cover 210 to vibrate, which in turn drives the housing assembly 100 to vibrate.

[0167] The vibration transmission plate 223 is provided to elastically constrain the relative movement of the voice coil assembly 221 and the magnet assembly 222, so that the magnet assembly 222 is always located within the surround of the voice coil assembly 221, thereby maintaining the interaction between the magnetic field and the current between the voice coil assembly 221 and the magnet assembly 222, thereby maintaining the vibration of the magnet assembly 222, and enabling the bone conduction speaker 200 to achieve the bone conduction function for a long time.

[0168] In some embodiments, as Figure 16 As shown, the vibration transmission plate 223 can be located between the second one of the voice coil assembly 221 and the magnet assembly 222 and the corresponding sealing plate 230. The sealing plate 230 is used to rigidly constrain the deformation amplitude of the vibration transmission plate 223 along the central axis direction, thereby rigidly constraining the relative movement range of the voice coil assembly 221 and the magnet assembly 222.

[0169] Specifically, during the interaction between the voice coil assembly 221 and the magnet assembly 222, the second of the voice coil assembly 221 and the magnet assembly 222 will affect the vibration transmission plate 223 and cause the vibration transmission plate 223 to undergo elastic deformation. Therefore, a sealing plate 230 is provided on the side of the vibration transmission plate 223 facing away from the voice coil assembly 221 and the magnet assembly 222 to rigidly constrain the deformation amplitude of the vibration transmission plate 223, thereby preventing the vibration transmission plate 223 from deforming beyond its elastic limit during the process of being driven to deform, causing the vibration transmission plate 223 to transition from elastic deformation to plastic deformation, thereby protecting the vibration transmission plate 223.

[0170] The sealing plate 230 can determine its fixed position according to the relative motion range of the voice coil assembly 221 and the magnet assembly 222 and the elastic limit of the vibration transmission plate 223, so that the sealing plate 230 can constrain the relative motion range of the voice coil assembly 221 and the magnet assembly 222, so that the sealing plate 230 and the vibration transmission plate 223 can jointly constrain the relative motion range of the voice coil assembly 221 and the magnet assembly 222 within the maximum relative motion range, thereby protecting the vibration transmission plate 223, the voice coil assembly 221 and the magnet assembly 222, and also improving the vibration effect of the bone conduction speaker 200.

[0171] In some embodiments, as Figure 8 as well as Figure 16 As shown, the vibration transmission plate 223 may include a central fixing portion 2231, an annular fixing portion 2232 surrounding the periphery of the central fixing portion 2231, and a connecting rod assembly 2233 connected between the central fixing portion 2231 and the annular fixing portion 2232, the annular fixing portion 2232 is connected to the cylindrical cover 210, and the central fixing portion 2231 is connected to the second of the voice coil assembly 221 and the magnet assembly 222.

[0172] The connecting rod assembly 2233 is capable of elastic deformation, and when current flows through the voice coil assembly 221, it can elastically constrain the second of the voice coil assembly 221 and the magnet assembly 222. Elastic constraint can be understood as allowing the voice coil assembly 221 and the second of the magnet assembly 222 to move relative to each other within the range of relative motion permitted by the elastic deformation of the connecting rod assembly 2233. The connecting rod assembly 2233 can not only limit the relative motion range between the voice coil assembly 221 and the magnet assembly 222 along the central axis, but also reposition the voice coil assembly 221 and the magnet assembly 222 through elastic recovery after relative motion between the voice coil assembly 221 and the magnet assembly 222.

[0173] The connecting rod assembly 2233 of the vibration transmission piece 223 has excellent elastic deformation capability, but it is also connected to the interior of the cylindrical cover 210, and cannot be sealed with the cylindrical cover 210. Instead, the sealing plate 230 can block the hollow space in the vibration transmission piece 223, forming a sealed space with the cylindrical cover 210. This arrangement can improve the magnetic circuit performance of the bone conduction speaker 10 and enhance the sound quality.

[0174] In a natural state, the central fixing portion 2231 and the corresponding sealing plate 230 are spaced apart in the central axis direction. This natural state refers to when no current is passing through the voice coil assembly 221, i.e., when the voice coil assembly 221 and the magnet assembly 222 are relatively stationary. When the voice coil assembly 221 and the magnet assembly 222 are relatively stationary, the space provided between the central fixing portion 2231 and the corresponding sealing plate 230 in the central axis direction allows the voice coil assembly 221 and the magnet assembly 222 to vibrate relative to the cylindrical housing 210 in the central axis direction, thereby enabling bone conduction to the user's body through the cylindrical housing 210 and the housing assembly 100 in the central axis direction.

[0175] Optionally, in a natural state, the central fixing portion 2231 is closer to the second of the voice coil assembly 221 and the magnet assembly 222 in the central axis direction than the annular fixing portion 2232. Furthermore, in a natural state, the vibration transmitting plate 223 may have a certain degree of pre-deformation, i.e., the connecting rod assembly 2233 of the vibration transmitting plate 223 has some pre-deformation. This ensures that in a natural state, the two vibration transmitting plates 223 can act on the magnet assembly 222 from both sides thereof, thereby ensuring that the magnet assembly 222 is located in the middle of the cylindrical cover 210. Furthermore, during subsequent vibration, the vibration of the magnet assembly 222 can be made more stable.

[0176] In the embodiment of the present application, the sealing plate 230 can be a flat plate, a concave plate with its middle position concave toward the magnet assembly 222 relative to its edge position, or a convex plate with its middle position convex away from the magnet assembly 222 relative to its edge position.

[0177] In some embodiments, the distance between the central fixing portion 2231 and the corresponding sealing plate 230 ranges from 0.005 to 0.8 mm.

[0178] Among them, defining an end distance between the central fixing portion 2231 and the corresponding sealing plate 230 allows the driving component 220 to drive the central fixing portion 2231 to vibrate within this distance, thereby driving the cylindrical cover body 210 to vibrate.

[0179] Optionally, the distance between the central fixing portion 2231 and the corresponding sealing plate 230 may be the distance between the center point of the central fixing portion 2231 and the center point of the sealing plate 230, such as Figure 9 As shown, the distance between the central fixing portion 2231 and the corresponding sealing plate 230 can be shown as distance H in the figure. For example, the distance between the center point of the central fixing portion 2231 and the center point of the sealing plate 230 can be 0.2 mm, 0.5 mm, or 0.7 mm. Setting the distance between the central fixing portion 2231 and the corresponding sealing plate 230 in this manner allows the sealing plate 230 to correspondingly limit the vibration of the central fixing portion 2231 and the drive assembly 220, preventing the drive assembly 220 from vibrating excessively and causing the connecting rod assembly 2233 to deform beyond its tolerance and cause damage.

[0180] like Figure 8 and Figure 9 As shown, the magnet assembly 222 may further include a magnet 2221 and two magnetic conductive plates 2222, which are respectively disposed on opposite sides of the magnet 2221 along the central axis. The magnetic conductive plates 2222 have a raised portion 2201 that protrudes toward the central fixing portion 2231, and the raised portion 2201 is fixedly connected to the central fixing portion 2231.

[0181] The magnetic conductive plates 2222 are used to constrain the direction of the magnetic field of the magnet 2221 on both side end surfaces of the magnet 2221 that are arranged opposite to each other along the central axis, thereby enhancing the interaction effect between the magnet 2221 and the voice coil 2211 .

[0182] The two protrusions 2201 of the two magnetic conductive plates 2222 respectively protrude toward the central fixing portions 2231 of the two vibration-transmitting plates 223 opposite the two magnetic conductive plates 2222, i.e., the two protrusions 2201 are oriented in opposite directions. By providing a fixed connection between the protrusions 2201 and the central fixing portions 2231, a relatively stable fixed connection between the two magnetic conductive plates 2222 and the two vibration-transmitting plates 223 is achieved. Furthermore, the connection between the magnetic conductive plates 2222 and the vibration-transmitting plates 223 does not occupy too much space in the connecting rod assembly 2233, thereby leaving sufficient area for elastic deformation of the connecting rod assembly 2233 and providing sufficient deformation space, thereby enhancing the elasticity of the vibration-transmitting plates 223.

[0183] In some embodiments, as Figure 8 as well as Figure 9 As shown, the voice coil assembly 221 may further include two groups of voice coils 2211 spaced apart along the central axis, the cylindrical cover 210 is wound around the periphery of the two groups of voice coils 2211, and the two magnetic conductive plates 2222 are respectively arranged to at least partially overlap with the two groups of voice coils 2211 along the radial projection of the bone conduction speaker 200, and the power supply directions of the two groups of voice coils 2211 are opposite to each other.

[0184] The radial direction of the bone conduction speaker 200 is as follows: Figure 9 As shown by the Y arrow in the middle, two magnetic conductive plates 2222 are positioned so that their radial projections along the bone conduction speaker 200 at least partially overlap with the two voice coils 2211. This enhances the interaction between the two magnetic conductive plates 2222 and the magnets 2221 and the two voice coils 2211, making the magnet assembly 222 more sensitive. Furthermore, the two voice coils 2211 are energized in opposite directions to ensure that the two voice coils 2211 experience the same force under the interaction of the same magnet 2221. This allows the magnets 2221 to move in the same direction under the influence of the two voice coils 2211 and the magnetic field. Furthermore, by changing the direction of the current flowing through the two voice coils 2211, the magnets 2221 can be made to vibrate along their central axis.

[0185] In some embodiments, the accommodation space 211 is filled with magnetic fluid, and the magnetic fluid occupies at least a portion of the accommodation space 211 .

[0186] Magnetic fluid, also known as magnetic liquid, ferromagnetic fluid, or magnetic fluid, possesses the fluidity of a liquid and the magnetism of a solid magnetic material. Compared to air, magnetic fluid has greater magnetic permeability, enhancing the magnetic field effect of magnet assembly 222 and making the vibration of magnet assembly 222 more sensitive. Furthermore, the presence of magnetic fluid reduces the resistance to relative motion between voice coil assembly 221 and magnet assembly 222, thereby enhancing the vibration effect and effectively improving sound quality, thereby enhancing the bone conduction effect of bone conduction speaker 200 and the sound quality of speaker assembly 10.

[0187] Optionally, the magnetic fluid may not fill up the accommodating space 211 . Such a configuration can reduce fluid resistance and improve the bone conduction effect of the bone conduction speaker 200 .

[0188] In some embodiments, when the bone conduction speaker 200 vibrates on its axis, it drives the housing assembly 100 to vibrate, and the air conduction speaker 300 and the housing assembly 100 become vibration loads. In related art, the air conduction speaker 300 is typically positioned to the side of the axis of the bone conduction speaker 200 (for example, the air conduction speaker 300 is often positioned radially perpendicular to the axis of the bone conduction speaker 200). In this case, the mass of the air conduction speaker 300 biases the vibration of the bone conduction speaker 200, causing the speaker assembly 10 to generate two torques in different directions, weakening the vibration of the bone conduction speaker 200 on its axis and reducing the volume of the bone conduction component of the earphone 1.

[0189] In order to solve the above problems, the following embodiment exemplarily describes the positions, structures, etc. of the bone conduction speaker 200 and the air conduction speaker 300 of the speaker assembly 10 .

[0190] like Figure 17 as well as Figure 18 As shown above, the bone conduction core module 200 and the air conduction core module 300 are disposed within the housing assembly 100. The bone conduction core module 200, also known as the bone conduction speaker 200, is used to conduct sound to the user through bone conduction vibration. The air conduction core module 300, also known as the air conduction speaker 300, is used to conduct sound into the user's ear canal through the principle of air vibration.

[0191] Optionally, the housing assembly 100 may define an accommodating space 110. The bone conduction core module 200 may be disposed within the accommodating space 110 and generate vibrations in a first vibration direction. The air conduction core module 300 is disposed within the accommodating space 110 and is aligned with and opposite to the bone conduction core module 200 along the first vibration direction. Specifically, the air conduction core module 300 and the bone conduction core module 200 being opposite each other means that, on a reference horizontal plane perpendicular to the first vibration direction, the projections of the air conduction core module 300 and the bone conduction core module 200 have an overlapping area.

[0192] The first vibration direction of the bone conduction core module 200 may be consistent with the central axis direction of the bone conduction core module 200. Figure 18 Indicated by the arrow X.

[0193] By arranging the air conduction core module 300 in the first vibration direction of the bone conduction core module 200, the mass of the air conduction core module 300 can be more concentrated on the axis of the bone conduction core module 200. When the bone conduction core module 200 vibrates along the first vibration direction, the biasing effect of the air conduction core module 300 on the vibration of the bone conduction core module 200 is weakened, so that the bone conduction core module 200 can better drive the housing assembly 100 to vibrate in the first vibration direction. The sound quality generated by the vibration of the bone conduction core module 200 is purer and conforms to the principles of acoustic design. In this way, the influence of the mass of the air conduction core module 300 on the vibration effect of the bone conduction core module 200 is reduced, and the bone conduction core module 200 can have a better bone conduction effect, thereby improving the sound quality of the bone conduction component of the earphone 1.

[0194] In some embodiments, the air conduction core module 300 can generate vibrations in the second vibration direction. The angle between the first vibration direction and the second vibration direction is 70° to 100°, or 80° to 90°.

[0195] Setting the first vibration direction and the second vibration direction to be different and intersecting with each other can reduce the mutual interference between the air conduction core module 300 and the bone conduction core module 200, so that the air conduction core module 300 has a better sound effect and the bone conduction core module 200 has a good bone conduction effect.

[0196] The angle formed by the first vibration direction and the second vibration direction can be 75°, 85° or 95°. For example, the first vibration direction and the second vibration direction can be perpendicular to each other, that is, the angle formed by the first vibration direction and the second vibration direction can be 90°. The second vibration direction can be the axial direction of the air conduction core module 300. Figure 18 Indicated by the Y arrow.

[0197] Such a configuration can greatly reduce the mutual influence between the air conduction core module 300 and the bone conduction core module 200, so that the vibration of each can be less easily affected by the vibration of the other, thereby improving the sound quality of the earphone 1.

[0198] In some embodiments, as Figures 17 and 18As shown, the housing assembly 100 may be provided with a first side surface 107, a second side surface 108, and a vibration transmission surface 109 (i.e., the face-facing side mentioned above). The first side surface 107, the second side surface 108, and the vibration transmission surface 109 may not be coplanar with each other, and the first side surface 107 and the second side surface 108 are spaced apart in a direction perpendicular to the first vibration direction. The housing assembly 100 may be provided with a sound outlet 114 that passes through the first side surface 107 and communicates with the accommodating space 110, and a pressure relief hole 115 that passes through the second side surface 108 and communicates with the accommodating space 110.

[0199] The sound outlet 114 and the pressure relief vent 115 are each used to conduct at least a portion of the sound waves generated by the air conduction movement module 300 to the external environment. However, the sound outlet 114 is typically positioned facing or near the user's ear, thereby conducting a portion of the sound waves generated by the air conduction movement module 300 to the user's ear. The pressure relief vent 115 is used to release air from the accommodating space 110 that dampens the vibration of the air conduction speaker 300, thereby achieving air pressure balance in the accommodating space 110 and reducing the impact on the vibration of the air conduction movement module 300.

[0200] Disposing the sound outlet 114 and the pressure relief hole 115 on the opposing first side surface 107 and second side surface 108, respectively, can relatively increase the distance between the sound outlet 114 and the pressure relief hole 115, thereby reducing the mutual influence, especially interference cancellation, between the sound waves emitted by the pressure relief hole 115 and the sound waves transmitted by the sound outlet 114, thereby improving the sound quality transmitted by the sound outlet 114. In other embodiments, the positions of the sound outlet 114 and the pressure relief hole 115 on the housing assembly 100 can be reversed to suit the specific position of the human ear.

[0201] Optionally, the vibration transmission surface 109 can be perpendicular to the first vibration direction, and the bone conduction core module 200 transmits vibrations outwardly through the vibration transmission surface 109. This arrangement ensures that the pressure relief hole 115, the sound outlet hole 114, and the vibration transmission surface 109 are not coplanar, thereby reducing the interference between the sound waves conducted by the sound outlet hole 114, the sound waves discharged by the pressure relief hole 115, and the vibrations on the vibration transmission surface 109. This improves the sound quality of the sound outlet hole 114 and the pressure relief hole 115.

[0202] In some embodiments, as Figure 18 As shown, the air conduction core module 300 can be stacked on the bone conduction core module 200 along the first vibration direction. In other words, the air conduction core module 300 and the bone conduction core module 200 are stacked along the first vibration direction. Optionally, the air conduction core module 300 and the bone conduction core module 200 are fixedly connected.

[0203] By fixing the air conduction movement module 300 to the bone conduction movement module 200 along the first vibration direction, the bone conduction movement module 200 can facilitate the vibration of the air conduction movement module 300, thereby reducing the influence of the counterweight of the air conduction movement module 300 on the vibration of the bone conduction movement module 200, thereby ensuring the bone conduction effect of the speaker assembly 10.

[0204] In some embodiments, as Figure 19 As shown, an elastic buffer 600 can be installed between the air conduction core module 300 and the bone conduction core module 200. The elastic buffer 600 can be an elastic colloid (such as silicone, rubber, etc.), a spring, an airbag, or a magnetic fluid. This arrangement can reduce the vibration impact and restriction of the air conduction core module 300 on the bone conduction core module 200, allowing the bone conduction core module 200 to vibrate more freely and achieve better vibration effects. Furthermore, the elastic buffer 600 can protect the air conduction core module 300.

[0205] In some embodiments, at least one of the air conduction core module 300 and the bone conduction core module 200 is fixed relative to the housing assembly 100. Alternatively, the air conduction core module 300 and the bone conduction core module 200 are each fixedly connected to the housing assembly 100. This arrangement can improve the operational stability of the bone conduction core module 200 and the air conduction core module 300.

[0206] In some embodiments, as Figure 20 As shown, the air conduction core module 300 can be spaced apart from the bone conduction core module 200 in the first vibration direction. This reduces the impact of the weight of the air conduction core module 300 on the vibration bias of the bone conduction core module 200. Furthermore, the spacing between the two reduces the mutual influence between their vibrations, reducing the possibility of vibration interference. Optionally, the air conduction core module 300 can be fixedly connected to the housing assembly 100. When the bone conduction core module 200 drives the housing assembly 100 to vibrate, the housing assembly 100 further drives the air conduction core module 300 to vibrate.

[0207] Optionally, the housing assembly 100 may be provided with a partition wall 150, and the accommodating space 110 may include a first accommodating cavity 111 and a second accommodating cavity 112 separated by the partition wall 150. The bone conduction core module 200 is disposed in the first accommodating cavity 111, and the air conduction core module 300 is disposed in the second accommodating cavity 112.

[0208] Alternatively, as Figure 19As shown, the housing assembly 100 includes a first housing 120, a second housing 130, and a third housing 140. The second housing 130 is joined to the first housing 120 and cooperates with each other to form a first accommodating cavity 111. The third housing 140 is joined to the first housing 120 and the second housing 130 respectively and cooperates with the first housing 120 to form a second accommodating cavity 112. Through the above arrangement, the speaker assembly 10 can be easily installed and disassembled.

[0209] Because the bone conduction core module 200 requires a tightly sealed environment to ensure effective bone conduction, placing the bone conduction core module 200 and the air conduction core module 300 in separate cavities can improve the bone conduction effect of the bone conduction core module 200. Optionally, the first accommodating chamber 111 can be sealed to provide improved airtightness.

[0210] Optionally, the shape and size of the first accommodating cavity 111 match the shape and size of the bone conduction core module 200, which can reduce the size of the speaker assembly 10 and facilitate the bone conduction core module 200 to drive the shell assembly 100 to vibrate and transmit bone conduction to the user's body.

[0211] In some embodiments, as Figure 20 As shown, the air conduction movement module 300 can generate vibrations in the second vibration direction. The housing assembly 100 is provided with a sound outlet 114 and a pressure relief hole 115, which are connected to the second accommodating chamber 112. The sound outlet 114 is used to transmit part of the sound waves generated by the air conduction speaker 300 to the outside of the speaker assembly 10. The pressure relief hole 115 is used to connect the second accommodating chamber 112 with the external environment to ensure air pressure balance within the second accommodating chamber 112, thereby reducing air pressure accumulation that may affect the sound effect produced by the air conduction speaker 300.

[0212] Among them, the sound outlet hole 114 and the pressure relief hole 115 are respectively arranged on the two side walls of the shell assembly 100 separated from each other in the second vibration direction. Such an arrangement can reduce the mutual interference between the sound waves propagated by the sound outlet hole 114 and the pressure relief hole 115, thereby improving the sound quality effect of the speaker assembly 10.

[0213] In some embodiments, as Figure 20 As shown, the bone conduction core module 200 may have a first central axis X extending along a first vibration direction. The air conduction core module 300 may generate vibrations in a second vibration direction and may have a second central axis Y extending along the second vibration direction. The angle between the first central axis X and the second central axis Y may be 70° to 100°.

[0214] For example, the angle between the first central axis X and the second central axis Y can be 80°, 85°, 90°, etc. Alternatively, the angle between the first central axis X and the second central axis Y can be 90°. This configuration can reduce the mutual influence between the vibration of the bone conduction core module 200 and the vibration of the air conduction core module 300, thereby ensuring the sound quality of the speaker assembly 10.

[0215] In some embodiments, as shown in FIG20 , the second housing 130 may have a contact area 131 that contacts the user's face when worn. A seam 132 between the first housing 120 and the second housing 130 is located outside of the contact area 131. Positioning the seam 132 between the first housing 120 and the second housing 130 outside of the contact area 131 rather than within the contact area 131 prevents the seam 132 from pinching the user's skin when the earphones 1 are in use.

[0216] In some embodiments, the air conduction core module 300 and the bone conduction core module 200 may be arranged along the first vibration direction. Optionally, the bone conduction core module 200 and the air conduction core module 300 may have overlapping projections on a reference plane perpendicular to the first vibration direction.

[0217] like Figure 21 As shown, the projection of the bone conduction core module 200 on the reference plane perpendicular to the first vibration direction can be as follows: Figure 21 As shown in K, the projection of the air conduction core module 300 on the reference plane perpendicular to the first vibration direction can be as follows Figure 21 As shown in J, J and K have an overlapping portion. Through the above arrangement, when the bone conduction core module 200 vibrates in the first vibration direction, the air conduction core module 300 is driven to vibrate together.

[0218] The bone conduction core module 200 has a relatively compact structure, resulting in a relatively concentrated and uniform mass. The vibration of the air conduction core module 300 mainly comes from the diaphragm 310. The diaphragm 310 occupies a large space but is lightweight. Its mass is mainly concentrated on the side of the air conduction core module 300 that is away from the diaphragm 310, that is, close to the magnetic circuit assembly 322. The volume of the bone conduction core module 200 and the air conduction core module 300 is specifically designed according to acoustic requirements. Therefore, the overlapping area of ​​the bone conduction core module 200 and the air conduction core module 300 perpendicular to the first vibration direction is designed as follows:

[0219] Optionally, the ratio of the overlapping area to the projected area of ​​the air conduction core module 300 on the reference plane may be greater than 20%, greater than 40%, or greater than 60%. For example, the ratio of the overlapping area to the projected area of ​​the air conduction core module 300 on the reference plane may be 25%, 45%, 50%, or 100%.

[0220] Optionally, the ratio of the overlapping area to the projected area of ​​the bone conduction core module 200 on the reference plane is greater than 20%, or greater than 40%, or greater than 60%. For example, the ratio of the overlapping area to the projected area of ​​the bone conduction core module 200 on the reference plane may be 25%, 45%, 50%, or 100%.

[0221] Such an arrangement of the air conduction core module 300 and the bone conduction core module 200 can effectively make most of the weight of the air conduction core module 300 fall on the bone conduction core module 200 in the first vibration direction, thereby reducing the influence of the air conduction core module 300 on the vibration of the bone conduction core module 200, thereby improving the vibration effect of the bone conduction core module 200 and enhancing the bone conduction sound quality of the bone conduction core module 200.

[0222] In some embodiments, as Figure 21 As shown, the distance between the projection of the center of mass of the bone conduction core module 200 on the reference plane perpendicular to the first vibration direction and the projection of the center of mass of the air conduction core module 300 on the reference plane can be less than 0.5 mm. Figure 20 As shown at point O, the center of mass of the air conduction core module 300 is as follows Figure 20 As shown in the Q point.

[0223] In the direction perpendicular to the first vibration direction, the smaller the distance between the center of mass of the bone conduction core module 200 and the center of mass of the air conduction core module 300, the less the vibration of the bone conduction core module 200 is affected by the weight bias of the air conduction core module 300, and the better the vibration effect and the better the sound quality.

[0224] Optionally, the distance may be 0 to 0.4 mm, or 0 to 0.2 mm. Figure 20 As shown, the distance between the center of mass of the bone conduction core module 200 and the center of mass of the air conduction core module 300 can be 0 mm. That is, the center of mass of the air conduction core module 300 and the center of mass of the bone conduction core module 200 are both located in the first vibration direction. In other words, on a reference plane perpendicular to the first vibration direction, the center of mass of the air conduction core module 300 completely overlaps with the center of mass of the bone conduction core module 200. Therefore, setting this distance between the two can reduce the different torques generated by the vibration of the bone conduction core module 200 and the air conduction core module 300, thereby improving the bone conduction effect of the bone conduction core module and enhancing the sound quality of the speaker assembly 10.

[0225] Of course, in other embodiments, on the reference plane perpendicular to the first vibration direction, the distance between the center of mass projection of the air conduction core module 300 and the center of mass projection of the bone conduction core module 200 can also be 0.1 mm, 0.25 mm, 0.3 mm, etc., which are not listed in detail in this embodiment.

[0226] Alternatively, the bone conduction core module 200 may have a first central axis X, with the first vibration direction being in the direction of the first central axis X. The distance between the center of mass of the air conduction core module 300 and the first central axis X is less than or equal to 0.5 mm. Similarly, the closer the center of mass of the air conduction core module 300 is to the first central axis X, the less impact the air conduction core module 300 has on the vibration of the bone conduction core module 200.

[0227] For example, optionally, Figure 20 As shown, the distance between the center of mass of the air conduction core module 300 and the first central axis X can be equal to 0 mm. Setting this distance between the two can also facilitate the bone conduction core module 200 to drive the air conduction core module 300 to vibrate along the direction of the first central axis X, thereby enabling the bone conduction speaker 200 to have a better bone conduction effect, and the speaker assembly 10 to have better sound quality.

[0228] Similarly, in other embodiments, the distance between the center of mass of the air conduction core module 300 and the first central axis X may also be 0.1 mm, 0.2 mm, 0.3 mm, etc., which will not be listed in detail in this embodiment.

[0229] In some embodiments, as Figure 21 As shown, the bone conduction core module 200 can be configured as a sealed structure, and the interior of the bone conduction core module 200 and the accommodating space 110 can be isolated from each other.

[0230] Alternatively, as Figure 8 as well as Figure 9 As shown, the bone conduction core module 200 may include a cylindrical housing 210, a drive assembly 220, and two sealing plates 230. The cylindrical housing 210 is fixedly connected to the housing assembly 100. The drive assembly 220 is disposed within the cylindrical housing 210 and is used to drive the cylindrical housing 210 to vibrate, thereby driving the housing assembly 100 to vibrate. The two sealing plates 230 are respectively disposed at both ends of the cylindrical housing 210 and seal the cylindrical housing 210 to form a sealed structure.

[0231] The vibrations generated by the drive assembly 220 within the sealed cylindrical housing 210 make it less susceptible to air resistance and other factors during vibration, thereby ensuring that the bone conduction core module 200 provides a good bone conduction effect. Furthermore, if the earphone 1 is dropped or impacted, the sealed cylindrical housing 210 prevents the drive assembly 220 from falling out of the housing 210 and causing damage to the internal structure, thereby improving the structural stability of the bone conduction core module 200.

[0232] Optionally, the bone conduction core module 200 may include a vibration transmission piece 223. The drive assembly 220 includes a voice coil assembly 221 and a magnet assembly 222. The voice coil assembly 221 is sleeved on the magnet assembly 222. The vibration transmission piece 223 is fixedly connected to the cylindrical housing 210 and the magnet assembly 222. The voice coil assembly 221 is fixedly connected to the cylindrical housing 210. The voice coil assembly 221 is configured to receive electrical signals and interact with the magnet assembly 222 to cause the magnet assembly 222 to vibrate. The magnet assembly 222 is configured to drive the cylindrical housing 210 to vibrate after interacting with the voice coil assembly 221. The vibration transmission piece 223 is configured to limit the position of the magnet assembly 222. Specifically, the two sealing plates 230 cover the cylindrical cover 210 to form a closed structure, which can better constrain the direction of the magnetic field, make the vibration of the magnet assembly 222 more sensitive, and prevent the vibration transmission piece 223 and the magnet assembly 222 from falling out of the cylindrical cover 210.

[0233] In some embodiments, a magnetic fluid may occupy at least a portion of the interior space of the cylindrical housing 210. Magnetic fluid, also known as magnetic liquid, ferromagnetic fluid, or magnetic fluid, has both the fluidity of a liquid and the magnetism of a solid magnetic material. Compared to air, magnetic fluid has superior magnetic permeability, which can increase the magnetic field effect of the magnet assembly 222, making the vibration of the magnet assembly 222 more sensitive, thereby enhancing the bone conduction effect of the bone conduction core module 200 and improving the sound quality of the speaker assembly 10.

[0234] Optionally, the magnetic fluid may not fill up the inner space of the cylindrical cover 210 . This configuration can reduce fluid resistance and improve the bone conduction effect of the bone conduction core module 200 .

[0235] Based on the above embodiments, the earphone 1 may include the speaker assembly 10 as described in the above embodiments.

[0236] In summary, the present application adds two sealing plates 230 on both sides of the bone conduction speaker 200 to seal the cylindrical cover, so as to confine the driving assembly 220 within the accommodating space 211 of the cylindrical cover 210, thereby making it difficult for the driving assembly 220 to fall out of the accommodating space 211, thereby improving the sound quality of the bone conduction speaker 200 and increasing the service life of the bone conduction speaker 200.

[0237] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A bone conduction speaker, characterized in that: include: The cylindrical cover body encloses a containing space; A driving assembly is disposed in the accommodating space and connected to the cylindrical cover; Two sealing plates are respectively arranged at two ends of the cylindrical cover body and seal the accommodating space.

2. The bone conduction speaker according to claim 1, characterized in that: The bone conduction speaker includes a vibration transmission plate, which connects the driving assembly and the cylindrical cover; in the central axis direction of the cylindrical cover, the vibration transmission plate is arranged between the driving assembly and the sealing plate, and is arranged opposite to the sealing plate.

3. The bone conduction speaker according to claim 2, characterized in that: One end of the cylindrical cover body is arranged in at least a step shape to form a first supporting surface and a second supporting surface with a step difference in the direction of the central axis, and the second supporting surface is closer to the central axis of the cylindrical cover body than the first supporting surface; the sealing plate is fixedly supported on the first supporting surface; the periphery of the vibration transmission plate is fixedly supported on the second supporting surface.

4. The bone conduction speaker according to claim 2, characterized in that: The two sealing plates are fixedly connected to the two ends of the cylindrical cover body, and the periphery of the vibration transmission plate is fixed to the inner wall of the cylindrical cover body.

5. The bone conduction speaker according to claim 2, characterized in that: The vibration transmission plate is fixedly connected to one end of the cylindrical cover body, and the sealing plate is fixedly stacked on a side of the vibration transmission plate away from the driving assembly and is spaced apart from the cylindrical cover body.

6. The bone conduction speaker according to any one of claims 2 to 5, characterized in that: There are two vibration transmission plates, which are respectively fixedly connected to the cylindrical cover body, and the two sealing plates are arranged one by one on the side of the two vibration transmission plates away from the driving assembly.

7. The bone conduction speaker according to claim 2, characterized in that: The driving assembly includes a voice coil assembly and a magnet assembly, wherein the first of the voice coil assembly and the magnet assembly is arranged around the second of the voice coil assembly and the magnet assembly, and the first of the voice coil assembly and the magnet assembly is fixedly connected to the cylindrical cover; the vibration transmission plate is fixedly connected to the second of the voice coil assembly and the magnet assembly and the cylindrical cover; the vibration transmission plate and the sealing plate are relatively arranged in the direction of the central axis, and the vibration transmission plate is used to elastically constrain the relative movement of the voice coil assembly and the magnet assembly along the direction of the central axis of the cylindrical cover.

8. The bone conduction speaker according to claim 7, characterized in that: The transmission plate is located between the second one of the voice coil assembly and the magnet assembly and the corresponding sealing plate, and the sealing plate is used to rigidly constrain the deformation amplitude of the transmission plate along the central axis direction, thereby rigidly constraining the relative movement range of the voice coil assembly and the magnet assembly.

9. The bone conduction speaker according to claim 8, characterized in that: The vibration transmission plate includes a central fixing portion, an annular fixing portion surrounding the periphery of the central fixing portion, and a connecting rod assembly connected between the central fixing portion and the annular fixing portion, the annular fixing portion is connected to the cylindrical cover body, and the central fixing portion is connected to the second of the voice coil assembly and the magnet assembly; in a natural state, the central fixing portion and the corresponding sealing plate have a gap in the direction of the central axis.

10. The bone conduction speaker according to claim 9, characterized in that: The distance between the central fixing portion and the corresponding sealing plate ranges from 0.005 to 0.8 mm.

11. The bone conduction speaker according to claim 9, characterized in that: In the natural state, the central fixing portion is closer to the second of the voice coil assembly and the magnet assembly in the direction of the central axis than the annular fixing portion; the magnet assembly includes a magnet and two magnetic conductive plates, and the two magnetic conductive plates are respectively arranged on two side surfaces of the magnet that are arranged opposite to each other along the direction of the central axis; the magnetic conductive plate has a protrusion protruding toward the central fixing portion, and the protrusion is fixedly connected to the central fixing portion.

12. The bone conduction speaker according to claim 10, characterized in that: The voice coil assembly includes two groups of voice coils spaced apart along the central axis direction, the cylindrical cover is wound around the periphery of the two groups of voice coils, the two magnetic conductive plates are respectively arranged to at least partially overlap with the two groups of voice coils in radial projection along the bone conduction speaker, and the power supply directions of the two groups of voice coils are opposite to each other.

13. The bone conduction speaker according to claim 1, characterized in that: The accommodating space is filled with magnetic fluid, and the magnetic fluid at least occupies a portion of the accommodating space.

14. A headset, characterized in that: include: The housing assembly is provided with a receiving space; The bone conduction speaker as described in any one of claims 1-13 is arranged in the accommodating space.

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