Sound production unit and head-mounted sound production equipment

Abstract

The utility model discloses a sound production unit and a head-mounted sound production device, and relates to the technical field of sound production devices, and the sound production unit comprises a housing assembly, a bone conduction sound production device and an air conduction sound production device. The shell assembly is provided with a sound outlet hole; the bone conduction sounding device is arranged in the shell assembly; the air conduction sound production device is arranged in the shell assembly, the air conduction sound production device comprises a vibrating diaphragm assembly, the vibrating diaphragm assembly comprises a vibrating diaphragm, the shell assembly comprises a front cavity and a rear cavity which are separated by the vibrating diaphragm, and the sound outlet hole is communicated with the front cavity; the geometric center O1 of the projection of the outer contour, located on the inner wall of the shell assembly, of the sound outlet hole in the vibration direction B of the air conduction sound production device on a plane perpendicular to the vibration direction B does not coincide with the geometric center O2 of the projection of the vibrating diaphragm in the same plane in the vibration direction B. Resonance in the acoustic cavity possibly caused when the sound outlet hole and the vibrating diaphragm are concentric can be reduced, so that the sound production quality is improved.

Description

[0001] Priority information: This application claims priority to Chinese patent application No. 202411044063.7, filed on July 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of sound-generating devices, and in particular to a sound-generating unit and a head-mounted sound-generating device. Background Technology

[0003] Head-mounted sound devices, such as headphones and smart glasses, all include a sound-generating device. Based on the different ways of sound transmission, the sound-generating device can be divided into bone conduction sound devices and air conduction sound devices.

[0004] Bone conduction devices typically include a coil and a magnetic circuit assembly, which vibrates as the energized coil drives the magnetic circuit assembly. Bone conduction devices are usually connected to a housing (such as the housing of an earphone head), through which the vibrations are transmitted to the skin of the face, allowing the person to hear sound.

[0005] Air-conducting sound-generating devices typically include a diaphragm, a coil connected to the diaphragm, and a magnetic circuit assembly that provides a magnetic field. When the coil is energized, it drives the diaphragm to vibrate under the interaction of the magnetic force with the magnetic circuit assembly, thereby agitating the air to produce sound.

[0006] With the development of technology, head-mounted audio devices have become increasingly mature and sophisticated, but there are still some areas for improvement to meet users' higher demands for head-mounted audio devices.

[0007] For example, traditional headphones typically only have bone conduction or air conduction devices, limiting sound production to either method. The applicant's research found that incorporating both bone conduction and air conduction devices within a single driver unit improves sound quality and expands sound production options. However, improper placement of these devices can lead to weak vibrations, low volume, poor listening experience, and discomfort.

[0008] For example, the installation of an air conduction sound-generating device may result in excessive sound leakage when the head-mounted sound device is working.

[0009] In summary, there is still room for improvement in many aspects of head-mounted audio devices, including sound quality (or listening effect), wearing comfort, reliability, and privacy (sound leakage prevention).

[0010] The above content is only used to help understand the technical solution of this application and does not constitute an admission that the above is prior art. Utility Model Content

[0011] The purpose of this invention is to provide a sound-generating unit and a head-mounted sound-generating device with better sound output.

[0012] To achieve the aforementioned objectives, this utility model provides a sound-generating unit, comprising:

[0013] The outer casing assembly has a sound outlet;

[0014] A bone conduction sound-emitting device, disposed within the housing assembly; and,

[0015] An air-conducting sound-generating device is disposed within the housing assembly. The air-conducting sound-generating device includes a diaphragm assembly, which includes a diaphragm. The housing assembly includes a front cavity and a rear cavity separated by the diaphragm. The sound outlet is connected to the front cavity.

[0016] The geometric center O1 of the projection of the outer contour of the sound outlet on the inner wall of the housing assembly along the vibration direction B of the air-conducting sound generating device onto a plane perpendicular to the vibration direction B, and the geometric center O2 of the projection of the diaphragm along the vibration direction B onto the same plane, do not coincide.

[0017] On the other hand, this utility model proposes a head-mounted sound-generating device, including a sound-generating unit as described above and a wearing mechanism for wearing the sound-generating unit on the human head.

[0018] Compared with the prior art, the present invention has the following beneficial effects: According to at least one embodiment of the present invention, the sound generating unit includes a bone conduction sound generating device and an air conduction sound generating device, which can be used to generate sound, expanding the diversity of sound generation methods and improving the listening effect; in addition, the outer shell assembly of the sound generating unit is provided with a sound outlet hole, and the geometric center O1 of the projection of the outer contour of the sound outlet hole on the inner wall of the outer shell assembly along the vibration direction of the air conduction sound generating device and the geometric center O2 of the projection of the diaphragm of the air conduction sound generating device along the vibration direction B do not coincide, which helps to reduce the resonance in the acoustic cavity that may be caused when the sound outlet hole and the diaphragm are concentric, thereby improving the sound generation quality. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a head-mounted sound-generating device according to some embodiments of this utility model.

[0020] Figure 2 This is a schematic diagram showing the included angle between the side surface of the functional compartment and the contact surface of the sound-generating unit in some embodiments of this utility model.

[0021] Figure 3 This is a schematic diagram of the sound-generating unit in some embodiments of this utility model.

[0022] Figure 4 This is a cross-sectional schematic diagram of the sound-generating unit in some embodiments of this utility model. In the figure, the housing is a single piece.

[0023] Figure 5 This is a cross-sectional schematic diagram of the sound-generating unit in some embodiments of the present invention. In the figure, the housing is a split type.

[0024] Figure 6 This is a cross-sectional schematic diagram of the sound-generating unit in some embodiments of the present invention. In the figure, the sound-generating unit only includes the bone conduction sound-generating device.

[0025] Figure 7 This is a cross-sectional schematic diagram of a sound-generating unit in some embodiments of the present invention. In the figure, the sound-generating unit only includes an air-conducting sound-generating device.

[0026] Figure 8 This is a schematic diagram of the structure of the sound-generating unit in some embodiments of this utility model.

[0027] Figure 9 yes Figure 8 The exploded view of the sound-generating unit shown.

[0028] Figure 10a yes Figure 8 The diagram shows a cross-sectional view of the sound-generating unit.

[0029] Figure 10b This is a schematic diagram of the structure of the sound-generating unit in some embodiments of this utility model.

[0030] Figure 10c This is a schematic diagram of the structure of the sound-generating unit in some embodiments of this utility model. In the figure, the structure of the bone magnetic circuit assembly is similar to... Figure 18a Consistent with the above.

[0031] Figure 10d This is a frequency response curve diagram of a sound-generating unit with through holes of different total area sizes in some embodiments of this utility model.

[0032] Figure 11 This is a cross-sectional schematic diagram of the sound-generating unit in some embodiments of this utility model.

[0033] Figure 12 This is a schematic diagram of the sound-generating unit in some embodiments of this utility model.

[0034] Figure 13 These are frequency response curves of the sound-generating units in some embodiments of this utility model when the sound-generating holes have different areas.

[0035] Figure 14a This is a structural schematic diagram of the bone conduction sound-generating device in some embodiments of this utility model.

[0036] Figure 14b yes Figure 14a The diagram shows a cross-sectional view of the bone conduction sound-generating device.

[0037] Figure 15 This is a cross-sectional schematic diagram of a bone conduction sound-generating device according to some embodiments of the present invention. The structure of the bone conduction magnetic circuit assembly in the figure is similar to that of the present invention. Figure 18a Consistent with the above.

[0038] Figure 16 This is a schematic diagram of the structure of a bone conduction sound-generating device according to some embodiments of the present invention. In the diagram, the bone conduction support is shaped like a racetrack.

[0039] Figure 17a This is a structural schematic diagram of the bone magnetic circuit assembly in some embodiments of this utility model.

[0040] Figure 17b yes Figure 17a The diagram shown is a schematic of the bone magnetic circuit assembly when it is a single, integrated component.

[0041] Figure 18a This is a structural schematic diagram of the bone magnetic circuit assembly in some embodiments of this utility model.

[0042] Figure 18b yes Figure 18a The diagram shown is a schematic of the bone magnetic circuit assembly when it is a single, integrated component.

[0043] Figure 19a This is a structural schematic diagram of the bone magnetic circuit assembly in some embodiments of this utility model.

[0044] Figure 19b yes Figure 19a The diagram shown is a schematic of the bone magnetic circuit assembly when it is a single, integrated component.

[0045] Figure 20a This is a structural schematic diagram of the bone magnetic circuit assembly in some embodiments of this utility model.

[0046] Figure 20b yes Figure 20a The diagram shown is a schematic of the bone magnetic circuit assembly when it is a single, integrated component.

[0047] Figure 21 yes Figure 14b A schematic diagram of the structure of a shrapnel.

[0048] Figure 22a This is a cross-sectional view of a bone conduction sound-generating device according to some embodiments of this utility model.

[0049] Figure 22b This is a cross-sectional view of a bone conduction sound-generating device according to some embodiments of this utility model. The structure of the bone conduction magnetic circuit assembly in the figure is similar to that of the present invention. Figure 18a Consistent with the above.

[0050] Figure 23 This is a structural schematic diagram of the air-conducting sound-generating device in some embodiments of this utility model.

[0051] Figure 24 yes Figure 23 A top view of the air-conducting sound-generating device shown.

[0052] Figure 25 It is along Figure 24 A sectional view obtained by cutting along the MM section line.

[0053] Figure 26 This is a top view of the magnetic support component in some embodiments of this utility model.

[0054] Figure 27 This is a top view of the magnetic support component in some embodiments of this utility model.

[0055] Figure 28 This is a top view of the magnetic support component in some embodiments of this utility model.

[0056] Figure 29 This is a structural schematic diagram of the air-conducting sound-generating device in some embodiments of this utility model.

[0057] Figure 30 yes Figure 29 The diagram shows a cross-sectional view of the air-conducting sound-generating device.

[0058] Figure 31 yes Figure 30 Enlarged view of Part III.

[0059] Figure 32 yes Figure 29 The diagram shows the positions of the magnetic support, main magnet, and main pole core plate of the air-conducting sound-generating device.

[0060] Figure 33 It is along Figure 25 The sectional view obtained by cutting along the JJ section line.

[0061] Figure 34 This is a schematic diagram showing the positions of the magnetically conductive support, secondary magnet, and secondary pole core plate in some embodiments of this utility model.

[0062] Figure 35 This is a schematic diagram showing the positions of the magnetically conductive support, secondary magnet, and secondary pole core plate in some embodiments of this utility model.

[0063] Figure 36 This is a schematic diagram showing the positions of the magnetically conductive support, secondary magnet, and secondary pole core plate in some embodiments of this utility model.

[0064] Figure 37 yes Figure 25The diagram shows the structure of the air-conducting magnetic circuit assembly of the air-conducting sound-generating device.

[0065] Figure 38 yes Figure 25 Enlarged view of Part II.

[0066] Figure 39 yes Figure 29 An exploded diagram of the diaphragm assembly.

[0067] Figure 40 yes Figure 23 A schematic diagram of the diaphragm assembly in the image. Detailed Implementation

[0068] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0069] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0070] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0071] The area of ​​a hole mentioned in this article refers to the size of the area enclosed by the outer contour of the hole.

[0072] Unless otherwise specified, the dimensions or ranges of “length,” “width,” “height,” “thickness,” “wall thickness,” etc. mentioned in this article refer to the dimensions or ranges of the largest part in the corresponding direction.

[0073] This specification describes a head-mounted sound-generating device that can be worn on the human head to enable a person to hear sound, for example, through bone conduction and / or air conduction. The head-mounted sound-generating device includes a sound-generating unit 10 and a wearing mechanism 11 connected to the sound-generating unit 10. The sound-generating unit 10 is used to emit sound, and the wearing mechanism 11 is used to wear the sound-generating unit 10 on the human head so that the sound can be easily heard. For example, the sound-generating unit 10 is worn in a position corresponding to the human ear, for example, directly inserted into the ear or located near the front of the ear.

[0074] In some embodiments, the wearing mechanism 11 may be a loop (e.g., U-shaped) with an opening, which is fitted over the user's head for wearing. In some embodiments, the wearing mechanism 11 may include ear hooks that are curved and can hang above the user's ears. In some embodiments, the wearing mechanism 11 may include structures such as curved back hooks and ear hooks adapted to hook above the human ear, with the back hooks adapted to wrap around the back of the human head. In some embodiments, the wearing mechanism 11 may also be a frame structure, the frame structure including temples located on both sides of the head, with the sound-generating unit 10 connected to the temples.

[0075] In some embodiments, the head-mounted sound device includes a single sound-emitting unit 10, which is worn on the left or right ear. For example, when the head-mounted sound device is a single-ear headphone, it includes only one sound-emitting unit 10 and may also have an ear hook that hooks onto the ear. In other embodiments, the head-mounted sound device includes two sound-emitting units 10, respectively worn on the left and right ears. For example, the head-mounted sound device may be a binaural headphone or glasses, in which case it includes two sound-emitting units. Depending on the product, the head-mounted sound device may also include a back hook and ear hooks or a frame structure.

[0076] The following example uses headphones, which are binaural headphones, as an illustration.

[0077] like Figure 1 As shown, Figure 1The headset shown is a binaural headphone, comprising two sound-generating units 10 (or headphone heads), a back hook 110 adapted to wrap around the back of the head, two ear hooks 111 adapted to hook onto the ears, and two functional compartments for housing a control circuit board and / or a battery. For example, the two functional compartments are a control compartment 112 for housing the control circuit board and a battery compartment 113 for housing the battery; or each functional compartment houses both the control circuit board and / or the battery. The back hook 110 connects between the two functional compartments. The two sound-generating units 10 are respectively assigned to the two functional compartments, and the sound-generating units 10 and their corresponding functional compartments are connected via the ear hooks 111. Specifically, the back hook 110 connects between the control compartment 112 and the battery compartment 113. The control compartment 112 and one of the sound-generating units 10, as well as the battery compartment 113 and the other sound-generating unit 10, are each connected via an ear hook 111. Understandably, the rear hook 110, ear hook 111, and two functional compartments together constitute the headphone wearing mechanism 11.

[0078] It is understandable that although this manual uses binaural headphones as an example, head-mounted sound devices are not limited to binaural headphones. For example, they can also be hearing aids, audio glasses, smart helmets, VR devices, AR devices, and other electronic devices.

[0079] The overall design of the head-mounted sound device is symmetrical to improve wearing comfort. For example... Figure 1 and Figure 2 As shown, the functional compartment has a side surface 1123 facing the human body when the head-mounted sound device is worn, and the sound unit 10 has a contact surface 10010 that contacts the human skin when the head-mounted sound device is worn. The included angle β1 formed between the side surface 1123 and the contact surface 10010 facing the head is an obtuse angle, so that the contact surface 10010 is deflected relative to the side surface 1123 towards the head at a certain angle. Optionally, the included angle β1 is in the range of 160° to 170°. When the head-mounted sound device is worn on the human head, since the contact surface 10010 is deflected towards the face, the ear hook 111 and the functional compartment will deflect to a certain extent away from the head after wearing, which helps to form a certain gap between the ear hook 111 and the scalp. This gap forms a space for placing the temples of glasses, so that when the user wears glasses, the temples of glasses and the ear hooks of the headphones, especially the bent parts, do not interfere or interfere less, making it easier to wear glasses and headphones at the same time and enhancing the stability of wearing glasses. In addition, the functional compartment can be placed against the back of the outer ear, and the sound unit 10 is tilted towards the side of the head, so that it fits more closely to the skin of the face, ensuring the stability of the earphone. When the angle β1 is in the range of 160° to 170°, it can also prevent the sound unit 10 from being too tilted, which would make it difficult to wear or uncomfortable.

[0080] Alternatively, the lower end 10010a of the contact surface 10010 is farther from the side surface 1123 on the same side as the contact surface 10010 than its upper end 10010b, that is, the sound-emitting unit 10 is deflected upward as a whole, so that the contact surface 10010 fits more closely with the facial skin, which is beneficial to improving the sound transmission effect, and at the same time can better ensure the formation of a gap to accommodate the temples.

[0081] It should be noted that when defining the included angle between two surfaces in this article, the surfaces can be either planar or curved. When the surface is planar, the included angle with that surface is the same as the included angle with the plane containing that surface. When the surface is curved, refer to... Figure 3 The most convex or concave point of the arc surface has a tangent plane 10011. The angle between the arc surface and the tangent plane 10011 can be understood as the angle between the arc surface and the tangent plane 10011. For example, when both the contact surface 10010 and the side surface 1123 are planes, the angle β1 is the angle between the two planes. When both the contact surface 10010 and the side surface 1123 are arc surfaces, the angle β1 is the angle between the tangent plane of the contact surface 10010 and the tangent plane of the side surface 1123.

[0082] The following section provides an example of the sound-generating unit in a head-mounted audio device.

[0083] The sound-generating unit 10 includes a housing assembly 100 and a sound-generating device disposed inside the housing assembly 100. Optionally, the housing assembly 100 is formed by connecting at least two housings. In some embodiments, such as... Figure 4 As shown, the outer shell assembly 100 includes a shell 1000 with an open end and a face cover 1001 that seals the open end of the shell 1000. The shell 1000 is integrally molded. The face cover 1001 contacts the facial skin when worn. Optionally, a soft layer (not shown) is provided on the outer side of the face cover 1001 to improve comfort when in contact with the face. The material of the soft layer can be, for example, silicone. It is understood that the surface of the face cover 1001 that contacts the facial skin is the contact surface 10010. In other embodiments, such as... Figure 5 As shown, the housing 1000 is formed by connecting two parts, including a side shell 1004 and a back cover 1002. The front cover 1001 and back cover 1002 are disposed opposite each other, each sealing one of the two open ends of the side shell 1004. Optionally, the side shell 1004 is tubular. The side shell 1004 is not limited to a single part; for example, it can be formed by connecting two or more parts into a tubular shape. It is understood that when the housing 1000 is integrally formed, the back cover 1002 and the side shell 1004 are integral. The housing 1000 is not limited to having only one opening; in other embodiments, the housing 1000 may also have two or more openings. For example, the side shell 1004 may have a notch, which is then sealed by a cover or other component.

[0084] The sound-generating unit 10 is connected to the ear hook 111 via its housing assembly 100. For example, the ear hook 111 may be connected to the side shell portion 1004.

[0085] The sound-generating device is used to convert electrical signals into mechanical vibrations. For example, it can be a bone conduction sound generator, which converts electrical signals into mechanical vibrations and transmits these vibrations directly to the skin through a face cover 1001 that fits in contact with the facial skin, allowing the person to hear the sound via bone conduction. The sound-generating device can also be an air conduction sound generator, in which case it uses mechanical vibrations to agitate air, thereby generating air-conducted sound. It is understood that the housing assembly 100 is not limited to installing only one or a single type of sound-generating device.

[0086] In some embodiments, reference Figure 6 The sound-generating unit 10 is a bone conduction sound-generating unit, in which only the bone conduction sound-generating device 2 is provided, and the air conduction sound-generating device 3 is not provided. Optionally, the bone conduction sound-generating device 2 is connected to the face cover 1001 and / or the back cover 1002. In some embodiments, refer to Figure 7 The sound-generating unit 10 is an air-conduction sound-generating unit, in which only the air-conduction sound-generating device 3 is provided, and the bone-conduction sound-generating device 2 is not provided. In some embodiments, such as Figure 4 and Figure 5 As shown, the sound-generating unit 10 can transmit sound through both bone conduction and air conduction. At this time, it is equipped with both a bone conduction sound-generating device 2 and an air conduction sound-generating device 3. Optionally, the bone conduction sound-generating device 2 is connected to the face cover 1001 and / or the back cover 1002.

[0087] It is understandable that when the sound-generating unit 10 has independently configured bone conduction sound-generating device 2 and air conduction sound-generating device 3, it can selectively utilize bone conduction sound-generating device 2 and air conduction sound-generating device 3 to generate sound, increasing the diversity of sound generation methods. Furthermore, it can fully utilize the combined performance advantages of bone conduction and air conduction by leveraging the individual sound generation characteristics of bone conduction sound-generating device 2 and air conduction sound-generating device 3, while avoiding their disadvantages. For example, it can filter out the frequency band with the strongest vibration in the bone conduction vibration section to reduce numbness, while utilizing the bass frequencies of the air conduction low-frequency section to enhance low-frequency sensitivity. Of course, the above examples are only one aspect; those skilled in the art can fully utilize combined methods to diversify and improve sound quality, overcoming the shortcomings of using a single sound-generating unit independently, thereby improving the listening effect. The following description uses a sound-generating unit with two sound-generating devices as an example. It is understood that the bone conduction sound-generating device 2 and air conduction sound-generating device 3 described below can also be applied individually to the sound-generating unit 10.

[0088] Figures 8 to 10aThis is a schematic diagram of the structure of a sound-generating unit 10 according to some embodiments of this specification. The sound-generating unit 10 includes a housing assembly 100 and a bone conduction sound-generating device 2 and an air conduction sound-generating device 3, both disposed within the housing assembly 100. The bone conduction sound-generating device 2 is connected to a face cover 1001, and its vibration is transmitted to the human body through the face cover 1001. The air conduction sound-generating device 3 is disposed on one side of the bone conduction sound-generating device 2. In other embodiments, the bone conduction sound-generating device 2 may also be connected to a back cover 1002, transmitting vibration to the face cover 1001 through the housing 1000, and then transmitting vibration to the human body through the face cover 1001. In other embodiments, the bone conduction sound-generating device 2 may also be connected to both the face cover 1001 and the back cover 1002 simultaneously. The housing assembly 100 is provided with a sound outlet 1003 communicating with the inside and outside. The air conduction sound-generating device 3 emits sound outward through the sound outlet 1003 and has a diaphragm 321 for vibration sound generation. Optionally, the diaphragm 321 is disposed opposite to the sound outlet 1003. Because both bone conduction sound generation device 2 and air conduction sound generation device 3 are installed simultaneously, bone conduction sound transmission and air conduction sound transmission can be realized at the same time, increasing the volume. They can also utilize their respective advantageous frequency bands to achieve better auditory effects.

[0089] In some embodiments, the air-conducting sound-generating device 3 is located on one side of the width direction of the bone-conducting sound-generating device 2, and the air-conducting sound-generating device 3 and the bone-conducting sound-generating device 2 are arranged along the width direction Y of the sound-generating unit 10. This arrangement makes the air-conducting sound-generating device 3 and the bone-conducting sound-generating device 2 more reasonable, the structure more compact, saves space and optimizes weight distribution, and helps to control the mass and volume of the sound-generating unit 10 within a small range. The sound-generating unit 10 can have a suitable shape and volume, and will not be too long to cause discomfort when worn. It also facilitates the air-conducting sound-generating device 3 to emit sound close to the ear. At the same time, when worn, the bone-conducting sound-generating device 2 is located on the side away from the ear. When the angle β1 formed between the side surface 1123 and the contact surface 10010 towards the head is 160° to 170°, the part of the outer shell assembly 100 corresponding to the bone-conducting sound-generating device 2 is deflected towards the face, which can better fit the face, thereby promoting the sound transmission efficiency of the bone-conducting sound-generating device 2. The length (X), width (Y), and thickness (or height) (Z) directions of the sound-emitting unit 10 can be referenced. Figure 8 In the XYZ coordinate system, the thickness direction is perpendicular to the contact surface 10010. It can be understood that the length, width and thickness direction of the outer shell assembly 100 are consistent with the length, width and thickness direction of the sound-emitting unit 10.

[0090] The air-conducting sound-generating device 3 and the bone-conducting sound-generating device 2 are elongated, with their length exceeding their width. For example, the outer contour of the cross-section of the air-conducting sound-generating device 3 and the bone-conducting sound-generating device 2 is rectangular (its corners can be rounded, right-angled, chamfered, or other transitional shapes between the long and short sides, such as curves) or racetrack-shaped. It is understood that the rectangular or racetrack-shaped outer contour of the cross-section of the air-conducting sound-generating device 3 and the bone-conducting sound-generating device 2 does not mean that the outer contour must be geometrically strictly rectangular or racetrack-shaped; it can be approximately rectangular or racetrack-shaped. Optionally, the bone-conducting sound-generating device 2 is positioned along the length direction of the sound-generating unit 10 (for example, the length direction of the bone-conducting sound-generating device 2 can coincide with the projection of the length direction of the sound-generating unit 10 onto the XY plane, or the two can form an angle of no more than 30°) to increase the volume of the bone-conducting sound-generating device 2, increase its sound pressure level, reduce distortion, and improve its sound emission effect. Further optionally, the length direction of the bone-conducting sound-generating device 2 is consistent with the length direction of the sound-generating unit 10. Alternatively, the housing assembly 100 may have a generally rectangular cavity to achieve a smaller size and higher internal space utilization while maintaining the desired performance. Even further, the bone conduction sound generator 2 and the air conduction sound generator 3 may be rectangular in shape, with a generally rectangular cross-section, to make fuller use of the internal space of the housing assembly 100. This results in a more compact structure for the entire sound unit 10, minimizing its size while meeting performance requirements. Consequently, the overall appearance and size of the earphone head are ergonomic, facilitating the installation of the bone conduction sound generator 2 and the air conduction sound generator 3 within the earphone head.

[0091] Optionally, the length-to-width ratio of the bone conduction sound generator 2 is 1.3 to 3, which allows the sound generating unit 10 to have sufficient vibration transmission area and space in the length direction. This helps to balance the length-to-width ratio of the bone conduction sound generator 2, ensuring good structural stability, vibration transmission efficiency, and sound quality while providing good acoustic performance. Further, the length-to-width ratio of the bone conduction sound generator 2 is 1.6 to 2 to further balance the length-to-width ratio and guarantee the output sound quality and effect.

[0092] Optionally, the length-to-width ratio of the air-conducting sound-generating device 3 is 1.3 to 3. The air-conducting sound-generating device 3 is positioned along the length direction of the sound-generating unit 10 (for example, the length direction of the air-conducting sound-generating device 3 can coincide with the projection of the length direction of the sound-generating unit 10 onto the XY plane, or the two can form an angle of no more than 30°). This is beneficial for maximizing space utilization while maintaining good structural stability, vibration transmission efficiency, and sound quality. Furthermore, the length-to-width ratio of the air-conducting sound-generating device 3 is 1.6 to 2 to further balance the aspect ratio and ensure good structural and acoustic output effects. Setting the bone-conducting sound-generating device 2 and the air-conducting sound-generating device 3 into elongated strips, with the air-conducting sound-generating device 3 positioned on one side of the width direction of the bone-conducting sound-generating device 2, facilitates a more compact structural arrangement, thereby fully utilizing the internal space of the outer shell assembly 100 and increasing the vibration transmission area of ​​the bone-conducting sound-generating device 2. For example, Figure 8 In the illustrated embodiment, if the bone conduction sound generator 2 is cylindrical, its volume will be smaller than that of a rectangular shape without changing the internal space of the housing assembly 100. It is understood that arranging the bone conduction sound generator 2 and the air conduction sound generator 3 in a cuboid or near-cuboid shape achieves better space utilization. In other embodiments, the bone conduction sound generator 2 and the air conduction sound generator 3 may be all or one of them cylindrical. In other embodiments, the bone conduction sound generator 2 and / or the air conduction sound generator 3 may also be polygonal prisms.

[0093] Unless otherwise specified, this instruction manual uses the cuboid-shaped bone conduction sound generator 2 and air conduction sound generator 3 as examples. It is understood that using the cuboid shape as an example does not mean that the bone conduction sound generator 2 and air conduction sound generator 3 must be cuboid-shaped; their cross-sectional outer contours can also be racetrack-shaped, cylindrical, elliptical, or polygonal, etc.

[0094] The vibration direction and sound outlet of the bone conduction sound generator 2 and the air conduction sound generator 3 will be illustrated with examples below.

[0095] like Figure 4 As shown, the positive direction of vibration direction A of the bone conduction sound-generating device 2 points towards the contact surface 10010 between the face cover 1001 and the human body. The positive direction of vibration is the direction pointing outward from the shell 1000, and the negative direction is the direction pointing inward from the shell 1000, which is opposite to the positive direction. Specifically, Figure 4In the diagram, "+" and "-" indicate the positive and negative directions, respectively. The positive direction of vibration direction A is upward, and the negative direction is downward. The positive direction of vibration direction B is to the left, and the negative direction is to the right. Optionally, the angle α1 between vibration direction A and contact surface 10010 is 60° to 90°. More preferably, the angle α1 between vibration direction A and contact surface 10010 is 75° to 90°. Even more preferably, the angle α1 between vibration direction A and contact surface 10010 is 90°. As mentioned above, when the contact surface 10010 is a plane, the angle α1 between an object (e.g., vibration direction A) and the contact surface 10010 is the angle between the object and the plane containing the contact surface 10010. When the contact surface 10010 is an arc surface, the most convex or concave point of the arc surface has a tangent plane 10011. In this case, the angle α1 between an object and the contact surface 10010 can be understood as the angle between the vibration direction A and the tangent plane 10011. Setting the angle α1 to be greater than 60° can reduce the component of vibration parallel to the face, allowing the vibration of the bone conduction sound-generating device 2 to be better transmitted to the skull and reducing vibration loss.

[0096] The positive direction of the vibration direction B of the air-conducting sound-generating device 3 points towards the side shell portion 1004 of the housing 1000. The vibration direction B is not parallel to or coincides with the vibration direction A of the bone-conducting sound-generating device 2; in other words, there is a non-zero angle between the vibration direction B of the air-conducting sound-generating device 3 and the vibration direction A of the bone-conducting sound-generating device 2. In some embodiments, such as... Figure 10a and Figure 10c As shown, the air-conducting sound-generating device 3 is positioned away from the bone-conducting sound-generating device 2 (the side where the diaphragm 321 of the air-conducting sound-generating device 3 is located is its front side, and its bottom surface 3b is its back side). In this configuration, its diaphragm 321 is close to the sound outlet 1003, and the magnetic base plate 3100 is closer to the bone-conducting sound-generating device 2 than the diaphragm assembly 32, which helps to improve sound transmission efficiency and increase volume. In other embodiments, refer to... Figure 10b The air-conducting sound-generating device 3 is positioned facing the bone-conducting sound-generating device 2. At this time, the diaphragm assembly 32 is closer to the bone-conducting sound-generating device 2 than the magnetic base plate 3100. For example, an opening can be provided on the bottom surface 3b of the air-conducting sound-generating device 3 or other parts, such as opening the ventilation hole 3c connecting the inner and outer sides of the air-conducting sound-generating device 3 to allow sound to be transmitted.

[0097] It is understandable that the air conduction sound generating device 3 is positioned facing or away from the bone conduction sound generating device 2, so that its thickness direction corresponds to the width direction of the sound generating unit 10. This reduces the space occupied in the width direction of the sound generating unit 10, which helps to prevent the sound generating unit 10 from being too wide and causing discomfort when worn.

[0098] refer to Figure 4 and Figure 8When the head-mounted sound device is worn, the side shell portion 1004 of the housing 1000 has a proximal end 10040 close to the human ear in its width direction Y. Obviously, the proximal end 10040 of the side shell portion 1004 is also the proximal end 10040 of the housing 1000, the outer shell assembly 100 and the sound generating unit 10. The air-conducting sound-generating device 3 is positioned closer to the proximal end 10040 of the bone-conducting sound-generating device 2, and is configured to emit sound towards the proximal end 10040 of the side shell portion 1004. The sound outlet 1003 is located on the proximal end 10040. This allows the air-conducting sound-generating device 3 to be close to and towards the ear, improving sound directness and clarity, reducing sound loss and distortion, enabling the user to hear a louder air-conducted sound, resulting in higher sound generation efficiency and better effect. Furthermore, it allows for a reduction in the size of the air-conducting sound-generating device 3, facilitating miniaturization. Additionally, the bone-conducting sound-generating device 2 is farther from the sound outlet 1003, reducing interference caused by internal sound waves emanating from the sound outlet when the bone-conducting sound-generating device 2 vibrates. Figure 1 As shown, the proximal end 10040 is also the end of the side shell 1004 near the functional compartment, and the sound outlet 1003 is opened on the end face of the side shell 1004 of the outer shell assembly 100 facing the functional compartment.

[0099] In some embodiments, reference Figure 11 The angle α2 between the vibration direction B of the air-conducting sound-generating device 3 and the contact surface 10010 is 0–45°. Setting the angle α2 between the vibration direction B and the contact surface 10010 to 0–45° allows the sound emitted by the air-conducting sound-generating device 3 to be more accurately directed to the ear canal, improving sound propagation efficiency and reducing sound leakage. Further optionally, the angle α2 is 0–30°, and even further, the angle α2 is 0–15°, so that the sound emitted by the air-conducting sound-generating device 3 can be more accurately directed to the ear canal. When the angle α2 is greater than 0°, the positive direction of the vibration direction B of the air-conducting sound-generating device 3 points towards the side where the contact surface 10010 is located, or towards the plane where the contact surface 10010 is located, and extends away from the bone conduction sound-generating device 2. Optionally, when wearing the head-mounted sound-generating device, the positive direction of the vibration direction B points towards the inside of the auricle, thereby utilizing the sound-focusing effect of the auricle to improve the hearing effect and help reduce sound leakage.

[0100] Understandably, the angles of the bone conduction sound generator 2 and the air conduction sound generator 3 can be adjusted in various ways. Figure 11In the illustrated embodiment, each is connected to the face cover 1001 and the side shell 1004 respectively via a connector 12. The surface of the connector 12 connected to the sound-generating device is inclined; therefore, the bone conduction sound-generating device 2 and the air conduction sound-generating device 3 are also inclined after installation. In other embodiments, the connector 12 may be omitted, and inclined surfaces may be provided on the face cover 1001 and the side shell 1004. The bone conduction sound-generating device 2 and the air conduction sound-generating device 3 are respectively installed on the corresponding inclined surfaces to adjust the angle.

[0101] In some embodiments, the angle α3 between the axial direction C of the sound outlet 1003 and the contact surface 10010 is 0–45°, so that the emitted sound can reliably propagate to the ear. Further optionally, the angle α3 is 0–30°, and even further, the angle α3 is 0–15°, which can further increase the sound propagation to the ear. Optionally, when the angle α3 is greater than 0°, the positive direction of the axial direction C of the sound outlet 1003 points towards the side where the contact surface 10010 is located, so that the sound is guided towards the ear canal by the sound outlet 1003, reducing sound leakage caused by outward dispersion. Similarly, the positive direction of the axial direction C of the sound outlet 1003 refers to the direction towards the outside of the housing, and the negative direction is opposite to the positive direction. Optionally, when wearing a head-mounted sound device, the positive direction of the axial direction C points towards the inside of the auricle, thereby utilizing the sound-focusing effect of the auricle to improve the listening effect and help reduce sound leakage.

[0102] It is understandable that the angle between the vibration direction or the axial direction (or other) and the contact surface 10010 (or other surface) is 0 to N degrees. This means that the angle can be 0 degrees, that is, parallel to the contact surface 10010, or greater than 0 degrees, that is, inclined to the contact surface 10010, but the angle of inclination is not greater than N degrees. For example, the angle α3 between the axial direction C of the sound outlet 1003 and the contact surface 10010 is 0 to 45 degrees, indicating that the axial direction C can be parallel to the contact surface 10010, or inclined relative to the contact surface 10010 with an angle not exceeding 45 degrees.

[0103] In some embodiments, the axial direction C of the sound outlet 1003 is consistent with the vibration direction B of the air conduction sound generator 3, that is, the axial direction C can be parallel to or coincide with the vibration direction B. In this case, the angles between the axial direction C and the vibration direction B and the contact surface 10010 are the same, which can further improve the efficiency of sound propagation. In some embodiments, the axial direction C of the sound outlet 1003 is parallel to the contact surface 10010, and the vibration direction B of the air conduction sound generator 3 is not parallel to the contact surface 10010. In some embodiments, the included angle α3 is greater than the included angle α2. The smaller the included angle α2, the more perpendicular it is to the depth direction of the housing 1000 and the cover 1001, which is more conducive to utilizing the space inside the housing assembly 100 and preventing the space occupied by the air conduction sound generator 3 and the bone conduction sound generator 2 from increasing due to their tilted arrangement. In addition, a smaller included angle α2 can bring the center of the diaphragm closer to the sound outlet 1003. The sound wave propagation path is shorter, which can increase the sound pressure level received by the human ear, and the air conduction sound generator 3 can output a larger volume at the same power. Therefore, an angle α3 greater than an angle α2 is beneficial for miniaturizing the sound-generating unit, or for increasing the volume of the bone conduction sound-generating device 2 and / or the air conduction sound-generating device 3 while keeping the volume constant, thereby improving the sound generation effect. Optionally, the vibration direction A is perpendicular to the contact surface 10010, the vibration direction B is parallel to the contact surface 10010, and the air conduction sound-generating device 3 adjusts the direction of the sound emitted from the sound outlet 1003 through the sound outlet 1003.

[0104] It is understandable that the axial direction C of the sound outlet 1003 can be adjusted in various ways, for example, Figure 11 In the illustrated embodiment, the sound outlet 1003 is inclinedly disposed on the side shell portion 1004. The axial direction C of the sound outlet 1003 is changed by the inclination of the sound outlet 1003 relative to the side shell portion 1004. Alternatively, the side shell portion 1004 can be disposed inclined relative to the contact surface 10010, and the sound outlet 1003 can be disposed vertically on the side shell portion 1004. The axial direction C of the sound outlet 1003 is changed by the inclination of the side shell portion 1004 relative to the contact surface 10010.

[0105] The number of sound outlets 1003 can be one or more, for example, one, two, three or more. In some embodiments, the geometric center O1 of the projection of the outer contour of at least one sound outlet 1003 on the inner wall of the side shell portion 1004 along the vibration direction B onto a plane perpendicular to the vibration direction B coincides with the geometric center O2 of the projection of the diaphragm 321 of the air-conducting sound generating device 3 onto the same plane along the vibration direction B. In other embodiments, refer to... Figure 12 The geometric center O1 of the outer contour of the sound outlet 1003 projected along the vibration direction B on the inner wall of the side shell 1004 does not coincide with the geometric center O2 of the diaphragm 321 of the air-conducting sound generating device 3 projected along the vibration direction B. Figure 12The outer contour of the diaphragm 321 is shown in dashed lines. When the sound outlet 1003 is concentrically positioned with the diaphragm 321, the resonance effect is aggravated. Concentricity between the sound outlet 1003 and the diaphragm 321 may cause resonance within the acoustic cavity, especially at higher frequencies. This can lead to resonance peaks and attenuation troughs at certain frequencies, affecting the naturalness and quality of the sound. Setting the sound outlet 1003 offset relative to the diaphragm 321, for example, at the edge of the diaphragm 321 or at other locations, can avoid or mitigate this situation, maintain the normal vibration of the diaphragm 321, improve the accuracy and clarity of the sound, reduce the total harmonic distortion (THD), and increase the fidelity and quality of the sound. Figure 12 In the illustrated embodiment, the number of sound outlets 1003 is one.

[0106] Optionally, the geometric center O1 of the sound outlet 1003 is offset relative to the geometric center O2 towards the ear canal, making it closer to the ear canal. This helps to increase loudness and reduce sound diffusion to the outer part of the head, thereby reducing sound leakage. (Continue to refer to...) Figure 12 In some embodiments, the geometric center O1 of the sound outlet 1003 is offset relative to the geometric center O2 towards the side closer to the faceplate 1001 to be closer to the ear canal. In other embodiments, the geometric center O1 of the sound outlet 1003 is offset relative to the geometric center O2 towards the connection 111a between the housing assembly 100 and the ear hook 111, so that the sound outlet 1003 is closer to the ear canal. In other embodiments, the geometric center O2 of the diaphragm 321 is offset towards both the faceplate 1001 and the connection 111a. Optionally, the distance D8 between the geometric center O2 of the diaphragm 321 and the geometric center O1 of the sound outlet 1003 is 0.1–8 mm to obtain better sound production effect and ensure the structural strength of the housing. The distance D8 between the geometric center O2 of the diaphragm 321 and the geometric center O1 of the sound outlet 1003 can be further selected as 1–4 mm to further ensure the effect.

[0107] The number of sound outlet holes 1003 can be one or more. In some embodiments, the total area of ​​all sound outlet holes 1003 is 10 to 130 mm². 2 The large total area of ​​the sound outlet 1003 allows the sound emitted by the diaphragm 321 to propagate better, and also shifts the high-frequency cutoff frequency of the air-conducting sound-generating device 3 backward, improving the sensitivity of mid-to-high frequencies. When the sound outlet 1003 is greater than 130mm... 2 At this time, further increasing the area of ​​the sound outlet 1003 has little effect on shifting the high-frequency cutoff frequency backward, and an excessively large sound outlet 1003 may lead to insufficient housing strength. Therefore, the area of ​​the sound outlet 1003 can be selected from 10 to 130 mm². 2 . Figure 13The simulation results show the frequency response curves of the sound-generating units with different areas of sound outlet 1003. During the simulation, the air-conducting sound-generating device 3 emitted sound, while the bone-conducting sound-generating device 2 did not. Except for the change in the area of ​​the sound outlet 1003, other parameters remained unchanged. As can be seen from the figure, as the area of ​​the sound outlet 1003 increases, the high-frequency cutoff frequency also increases, the frequency band before the high-frequency cutoff frequency becomes flatter, and the frequency response attenuation after the high-frequency cutoff frequency becomes smaller. Thus, the bandwidth of the frequency response curve of the air-conducting part of the entire device is also wider. The bandwidth refers to the difference between the frequency value corresponding to the high-frequency cutoff frequency and the frequency value corresponding to the resonant peak at F0. Generally speaking, the wider the bandwidth, the better the sound quality, and it can also effectively improve the sensitivity of the mid-high frequency range and increase the volume of the air-conducting part. Because of its wider bandwidth, the sound details in the high frequencies are more refined. For example, when playing symphonic music or high-fidelity vocal pieces, the high notes of the violin and piano are clear, textured, and discernible to the human ear. The breaths and unique vocal details of singers are also presented. At the same time, due to the high fidelity and clarity of sound reproduction, distortion is significantly reduced. Overall, the subjective listening experience is richer and warmer in timbre, greatly contributing to the overall sound quality improvement. Therefore, the area of ​​the sound output port 1003 is set to 10–130 mm. 2 This helps the air-conducting sound-generating device 3 to have a better frequency response curve and improve the sound production effect. Further optionally, the total area of ​​all the sound outlet holes 1003 is 40–100 mm². 2 While ensuring mid-to-high frequency sensitivity, the structural strength of the shell is further guaranteed.

[0108] Optionally, the number of sound outlets 1003 is one, in order to reduce the obstruction of sound waves by the physical parts between multiple sound outlets 1003, so that the sound can be transmitted more efficiently.

[0109] Optionally, at least one sound outlet 1003 is elongated and arranged along a direction parallel to the contact surface 10010, or at an angle not exceeding 15° with this parallel direction. This reduces sound diffusion into the space outside the head, thereby reducing sound leakage. Simultaneously, the length direction of the air-conducting sound-generating device 3 is arranged along the length direction X of the sound-generating unit 10, making the extension direction of the sound outlet 1003 close to or consistent with the length direction of the diaphragm 321, which is beneficial for sound wave propagation. Further optionally, the width W4 of the sound outlet 1003 is 0.8–8 mm, and the length L11 is 3–15 mm. Further optionally, two or more sound outlets 1003 are arranged along the length direction of the sound outlet 1003 to further reduce sound leakage and improve sound propagation efficiency.

[0110] In some embodiments, reference Figure 11The vibration direction A of the bone conduction sound generator 2 is inclined relative to the contact surface 10010, and its positive direction points away from the location of the air conduction sound generator 3. The positive direction B of the air conduction sound generator 3 points away from the location of the bone conduction sound generator 2. The vibration direction B can be inclined relative to the contact surface 10010 or parallel to it. When the bone conduction sound generator 2 and the air conduction sound generator 3 are working, the vibrating parts inside them (i.e., the vibrator of the bone conduction sound generator 2 and the diaphragm assembly 32 of the air conduction sound generator 3) will generate a certain vibration force. Since this vibration force is not completely perpendicular to the contact surface 10010, it will generate a component force parallel to the contact surface 10010. This not only affects comfort but may also cause the headphone head to shift in a direction parallel to the contact surface 10010. By pointing the positive direction A of the bone conduction sound generator 2 away from the direction of the air conduction sound generator 3, and pointing the positive direction A of the air conduction sound generator 3 away from the direction of the bone conduction sound generator 2, the component forces parallel to the contact surface 10010 generated when the bone conduction sound generator 2 and the air conduction sound generator 3 vibrate simultaneously in a positive or negative direction can at least partially cancel each other out. This reduces or even eliminates the vibration in the direction parallel to the contact surface 10010, improving wearing comfort and stability. The oscillator mass of the bone conduction sound generator 2 is M1, and the diaphragm assembly 32 of the air conduction sound generator 3 is M2. Optionally, the ratio of M1*cosα1 to M2*cosα2 is 0.8 to 1.2, further preferably 0.9 to 1.1, and even more preferably 1, to further ensure wearing comfort and stability. Here, "*" refers to a multiplication sign.

[0111] In the embodiments described in this specification, the thickness direction of the bone conduction sound generator 2 is consistent with its vibration direction A, and the thickness direction of the air conduction sound generator 3 is consistent with its vibration direction B.

[0112] The connection structure between the air-conducting sound-generating device 3 and the outer shell assembly 100, as well as the relevant features of the front cavity, will be illustrated with examples below.

[0113] In some embodiments, the sound-generating unit 10 further includes a front cavity 10042 and a rear cavity 10044, which are separated by the diaphragm 321 of the air-conducting sound-generating device 3. Specifically, the side of the diaphragm 321 facing outwards from the housing assembly 100 is the front cavity, and the side facing inwards from the housing assembly 100 is the rear cavity. The front cavity 10042 communicates with the sound outlet 1003 to emit sound outwards. By providing the front cavity 10042, it is advantageous to concentrate the sound generated by the vibration of the diaphragm 321 through the front cavity 10042 and the sound outlet 1003, thereby improving sound transmission efficiency, reducing volume loss, and allowing the use of a smaller air-conducting sound-generating device 3, which is beneficial for miniaturization of the sound-generating unit 10. Simultaneously, it is beneficial for improving high-frequency sensitivity. It is understood that the interior and exterior of the air-conducting sound-generating device 3 are connected to allow for smooth airflow and balance the internal and external air pressures of the air-conducting sound-generating device 3. Optionally, the air-conducting sound-generating device 3 has at least one vent 3c connecting its interior and exterior. The vent 3c can be provided, for example, on the magnetic base plate 3100 and / or magnetic side plate 3101 of the magnetic support member 310. Figure 10a The illustration shows a case where a vent 3c is provided on the magnetically conductive base plate 3100. In some cases, sound can be emitted outward through the vent 3c, for example, as shown in the reference... Figure 10b When the bottom surface 3b of the air-conducting sound-generating device 3 is set facing the sound outlet 1003, it can emit sound outward through the vent 3c.

[0114] Optionally, the outer contour of the cross section of the air-conducting sound-generating device 3 perpendicular to the vibration direction B is approximately rectangular, and the outer contour of the cross section of the front cavity 10042 perpendicular to the vibration direction B is also approximately rectangular. This makes full use of the internal space of the housing 1000, allowing the cross section size of the air-conducting sound-generating device 3 perpendicular to the vibration direction B to be larger. This enables the air-conducting sound-generating device 3 to increase its volume without excessively increasing its thickness, ensuring sound generation. Additionally, it allows the diaphragm 321 to have a larger area, which is beneficial for increasing volume and enhancing low-frequency effects.

[0115] Figure 16The simulation results show the frequency response curves of the sound-generating unit 10 corresponding to different volumes of the front cavity. During the simulation, the air-conduction sound-generating device 3 emitted sound, while the bone-conduction sound-generating device 2 did not. Except for the change in the volume of the front cavity 10042, other parameters remained unchanged. The figures show that as the volume of the front cavity decreases, the high-frequency cutoff frequency becomes larger, the curve between the high-frequency resonant peak and the low-frequency resonant peak becomes flatter, and the sound pressure level attenuation after the high-frequency resonant peak is smaller. The volume of the front cavity 10042 refers to the volume of the space enclosed between the diaphragm assembly 32 and the sound outlet 1003. Specifically, the volume of the front cavity 10042 refers to the volume of the space enclosed by the inner wall of the outer shell assembly 100 on the side of the diaphragm assembly 32 near the sound outlet 1003 and the diaphragm assembly 32 (excluding the volume of the sound outlet 1003). Optionally, the volume of the front cavity 10042 can be 10–250 mm². 3 A smaller front cavity 10042 helps extend the resonant frequency of the front cavity to higher frequencies, preventing the high-frequency cutoff frequency from being too high and resulting in low high-frequency sensitivity, thereby improving the sound production effect. However, if the front cavity 10042 is too small, it will affect the normal operation of the diaphragm 321, for example, it may cause the diaphragm 321 to contact the housing and generate noise. In order to provide sufficient vibration space for the diaphragm 321 in the front cavity 10042, while ensuring that the high-frequency cutoff frequency is low, the volume of the front cavity 10042 can be further selected to be 50-200mm. 3 Furthermore, it can be selected as 70-180mm. 3 This makes the volume of the front cavity 10042 more suitable, without taking up too much space, and also helps to ensure the structural strength of the shell.

[0116] In some embodiments, the bone conduction sound generator 2 and the air conduction sound generator 3 are located in the same cavity of the housing assembly 100. This allows the housing assembly 100 to have a larger rear cavity 10044, reducing the F0 of the air conduction sound generator 3 and improving low-frequency performance. Furthermore, it effectively utilizes the internal space of the housing assembly 100, allowing for a more rational arrangement of the two sound generators within the earphone head. Compared to separating the two bone conduction sound generators 2 and air conduction sound generator 3 with a partition, this results in a smaller and more compact earphone head. Simultaneously, the reduced earphone head size leads to a corresponding reduction in the housing volume, reducing the overall weight of the earphone head and alleviating the burden during wear. This weight reduction also helps improve the high-frequency response of the bone conduction sound transmission section, enhancing the high-frequency sound quality. In some embodiments, refer to... Figure 10a The housing 1000 is provided with through holes 10000 communicating with its inner and outer sides. For example, one or more (in this specification, multiple includes two or more) through holes 10000 can be provided on the back cover 1002 and / or the side shell 1004. The through holes 10000 communicate with the rear cavity 10044, which helps to increase the rear cavity 10044 of the air-conducting sound-generating device 3, thereby reducing F0 and improving low-frequency sensitivity. Figure 10d As shown, Figure 10d The simulation results show the frequency response curves of the sound-generating unit 10 with through-holes 10000 of different total area sizes. During the simulation, the air-conducting sound-generating device 3 emitted sound, while the bone-conducting sound-generating device 2 did not. Except for the change in the area of ​​the through-holes 10000, other parameters remained constant. The figure shows that when the total area of ​​the through-holes 10000 is less than or equal to 0.3 mm... 2 At this time, the frequency response curve is poor, with a large low-frequency F0 exceeding 1000Hz. Optionally, the total area of ​​all 10000 vias can range from 1 to 80 mm². 2 To improve sound quality, the total area of ​​all 10000 through holes can be further selected from 5 to 40 mm. 2 This results in a frequency response curve with a smaller low-frequency F0 and a smoother curve, leading to better sound quality. The area of ​​the through-hole 10000 can be understood as the area enclosed by the outer contour of the outer surface of the housing assembly 100.

[0117] The number of through holes 10000 can be one; for example, the area of ​​a single through hole 10000 is 1 to 80 mm². 2 Further options include 5–40 mm. 2 In some embodiments, there are multiple through holes 10000, and the area of ​​a single through hole 10000 is 0.03 to 3 mm. 2 Further options include 0.05–1 mm. 2 To increase the size of the rear cavity 10044 while preventing excessive sound leakage due to an overly large through-hole 10000, and to facilitate waterproofing and dustproofing, optionally, the through-hole 10000 is covered with a waterproof mesh and / or a dustproof mesh to achieve waterproofing and dustproofing. In other embodiments, the bone conduction sound generating device 2 and the air conduction sound generating device 3 can be respectively set in two independent cavities, for example, separated by a partition, to reduce mutual interference during operation. Optionally, the cavity where the air conduction sound generating device 3 is located is provided with a through-hole 10000 communicating with the outside. The parameters of the through-hole 10000 can be referred to above. Alternatively, the cavity where the bone conduction sound generating device 2 is located is provided with a through-hole 10000, and the partition is provided with a channel connecting the two cavities.

[0118] The air-conducting sound-generating device 3 is fixedly connected to the housing assembly 100. In some embodiments, the air-conducting sound-generating device 3 is connected to the inner wall of the side shell portion 1004, for example, through its diaphragm 321, air-conducting support 30, magnetically conductive side plate 3101 and / or magnetically conductive base plate 3100 (see reference numerals). Figure 25 and Figure 30The air-conducting sound-generating device 3 is connected to the inner wall. In other embodiments, to further reduce the space occupied by the air-conducting sound-generating device 3 within the housing assembly 100, the air-conducting sound-generating device 3 can be embedded in the side housing portion 1004. This reduces the space occupied by the air-conducting sound-generating device 3 within the housing assembly 100, thereby facilitating the miniaturization of the sound-generating unit 10. Additionally, it improves the robustness of the connection between the air-conducting sound-generating device 3 and the side housing portion 1004. The air-conducting sound-generating device 3 is at least partially embedded in the side housing portion 1004, for example, referring to... Figure 8 and Figure 9 The inner wall of the side shell 1004 is provided with a mounting groove 10041, and the air-conducting sound-generating device 3 is disposed in the mounting groove 10041. In the illustrated embodiment, the air-conducting sound-generating device 3 is partially located in the mounting groove 10041. In other embodiments, the air-conducting sound-generating device 3 may also be completely located in the mounting groove 10041. The mounting groove 10041 not only saves space occupied by the air-conducting sound-generating device 3, but also serves to position the air-conducting sound-generating device 3. Compared with the solution of attaching it to the inner wall of the side shell 1004, there is no need to set up a separate limiting structure. Furthermore, the mounting groove 10041 makes the contact area between the air-conducting sound-generating device 3 and the outer shell assembly 100 relatively larger, which can also increase the firmness of the installation of the air-conducting sound-generating device 3. Optionally, the depth D14 of the mounting groove 10041 is 0.3 to 1.5 mm, and the air-conducting sound-generating device 3 has sufficient embedding depth, thereby increasing the reliability of positioning and connection. At the same time, the wall thickness of the part of the side shell 1004 used to install the air-conducting sound-generating device 3 is not too thick, which helps to reduce the mass of the sound-generating unit 10.

[0119] Optionally, the faceplate 1001 is connected to the end face 1000a of the housing 1000, and one side of the mounting groove 10041 extends to the end face 1000a and has an opening facing the end face 1000a. That is, the mounting groove 10041 is connected to the end face 1000a. In this way, the air-conducting sound generating device 3 can be directly installed downward from the end face 1000a, which is more convenient for installation and can make fuller use of the space in the thickness direction of the sound generating unit 10. This is beneficial to increase the volume of the air-conducting sound generating device 3 and the effective radiation area of ​​the diaphragm 321, or reduce the volume of the sound generating unit 10. Figure 9 In the illustrated embodiment, the mounting groove 10041 is not connected to the back cover 1002, and its other side is spaced apart from the back cover 1002. Further alternatively, in other embodiments, the mounting groove 10041 is connected to the back cover 1002, that is, the other side of the mounting groove 10041 extends to the inner surface of the back cover 1002, so as to further improve space utilization and increase the available size of the air-conducting sound generating device 3 in the thickness direction of the sound generating unit 10.

[0120] The air-conducting sound-generating device 3 can be adhesively connected to the inner wall of the mounting groove 10041 and / or the back cover 1002 and / or the front cover 1001. When the air-conducting sound-generating device 3 is connected to two or all of the mounting groove 10041, the back cover 1002, and the front cover 1001, the connection is further secured, ensuring the reliability of the air-conducting sound-generating device 3. Optionally, the air-conducting sound-generating device 3 can be adhesively connected to the bottom surface 10043 of the mounting groove 10041, for example, by using double-sided tape or adhesive application. For example, see reference... Figure 10a The outer edge of the diaphragm 321 of the air-conducting sound-generating device 3 (e.g., the outer ring plate 3210 mentioned below) is bonded to the bottom surface 10043 of the groove. In other embodiments, the air-conducting sound-generating device 3 also includes a pressure cap 33 connected to the diaphragm 321, in which case it can be bonded to the bottom surface 10043 of the groove through the pressure cap 33. In other embodiments, the air-conducting sound-generating device 3 can also be bonded to the bottom surface 10043 of the groove through its magnetically conductive base plate 3100. The air-conducting sound-generating device 3 can also be bonded to the side wall of the mounting groove 10041 and the face cover 1001 with adhesive, thereby improving the firmness of the connection. Optionally, when the air-conducting sound-generating device 3 is installed in the mounting groove 10041, it is flush with the end face 1000a of the housing 1000 facing the face cover 1001, so as to facilitate the installation and bonding of the face cover 1001. Optionally, the air-conducting sound-generating device 3 can also be bonded to the back cover 1002. In some embodiments, a cavity may be provided on the cover 1001, and the air-conducting sound-generating device 3 extends beyond the end face 1000a into the cavity to increase the volume of the air-conducting sound-generating device 3 and improve space utilization.

[0121] refer to Figure 9 and Figure 10a The side shell portion 1004 of the housing 1000 is provided with the aforementioned front cavity 10042. The front cavity 10042 connects the mounting groove 10041 and the sound outlet 1003. The front cavity 10042 is correspondingly arranged with the sound outlet surface (i.e., diaphragm 321) of the air-conducting sound-generating device 3, and extends from the bottom surface 10043 of the mounting groove 10041 toward the sound outlet 1003. It is understood that the mounting groove 10041 is not necessary. For example, the mounting groove 10041 may not be provided, and the front cavity 10042 may be directly formed on the inner wall of the side shell portion 1004 and connected to the sound outlet 1003. The air-conducting sound-generating device 3 is also directly connected to the inner wall of the side shell portion 1004.

[0122] The bone conduction sound generation device 2 of the sound generation unit 10 will be illustrated with an example next.

[0123] First, it should be noted that the bone conduction sound generating device 2 and the air conduction sound generating device 3 include similar components, such as supports, magnetic circuit assemblies, and coils. For ease of distinction, the corresponding components of the bone conduction sound generating device 2 and the air conduction sound generating device 3 are referred to as bone conduction components or air conduction components, respectively. For example, the support, magnetic circuit assembly, and coil of the bone conduction sound generating device 2 are referred to as bone conduction support, bone conduction magnetic circuit assembly, and bone conduction coil, respectively; and the support, magnetic circuit assembly, and coil of the air conduction sound generating device 3 are referred to as air conduction support, air conduction magnetic circuit assembly, and air conduction coil, respectively.

[0124] Figure 14a This is a schematic diagram of the structure of the bone conduction sound-generating device 2 according to some embodiments of this specification. Figure 14b yes Figure 14a The diagram shows a cross-sectional view of the bone conduction sound-generating device 2. Figure 15 This is a cross-sectional schematic diagram of a bone conduction sound-generating device 2 according to another embodiment. The bone conduction sound-generating device 2 includes a bone conduction support 20, a bone conduction magnetic circuit assembly 21, at least one bone conduction coil 22, and at least one spring 23. The bone conduction magnetic circuit assembly 21 and the bone conduction coil 22 are both disposed inside the bone conduction support 20. The spring 23 connects the bone conduction support 20 and the bone conduction magnetic circuit assembly 21. Optionally, the spring 23 is connected to the end face 202 of the bone conduction support 20. The bone conduction coil 22 surrounds the outside of the bone conduction magnetic circuit assembly 21 and is fixed relative to the bone conduction support 20. It is used to drive the bone conduction magnetic circuit assembly 21 to vibrate. The bone conduction magnetic circuit assembly 21 is connected to the bone conduction support 20 through the spring 23 and can be reset by the elastic force of the spring 23. The bone conduction sound-generating device 2 is connected to a face cover 1001 to transmit vibration to the face cover 1001. For example, it can be connected to the face cover 1001 through the bone conduction support 20, the spring 23, or the connector 12. In this specification, the stator of the bone conduction sound generating device 2 refers to the part that is stationary relative to the outer shell assembly 100 when the bone conduction sound generating device 2 is working, including components such as the bone conduction support 20 and the bone conduction coil 22. The vibrator of the bone conduction sound generating device 2 refers to the part that moves relative to the bone conduction support 20 when the bone conduction sound generating device 2 is working, including components such as the bone conduction magnetic circuit assembly 21 and the spring piece 23.

[0125] In some embodiments, the bone conduction support 20 is annular with open ends and surrounds the outside of the bone conduction magnetic circuit assembly 21 and the bone conduction coil 22. Optionally, the bone conduction support 20 is rectangular (the four corners can be rounded, right-angled, oblique, or other curved shapes that reduce the volume of the four corners), which facilitates its installation in the housing assembly 100 in conjunction with the air conduction sound generating device 3, and makes fuller use of the space within the housing assembly 100. It is understood that in other embodiments, the shape of the bone conduction support 20 can also be other shapes, such as annular, racetrack-shaped, etc. Figure 16 This shows a schematic diagram of a bone conduction sound-generating device 2 when the bone conduction support 20 is in the shape of a racetrack.

[0126] In some embodiments, the bone magnetic circuit assembly 21 includes at least one magnet 210 and at least two magnetic plates 211, with a magnet 210 connected between two adjacent magnetic plates 211. The N and S poles of the magnet 210, as well as the magnet 210 and the magnetic plates 211, are arranged along the vibration direction A of the bone magnetic circuit assembly 21. When the number of magnets 210 is greater than or equal to two, the polarities of the opposite magnetic poles of two adjacent magnets 210 are the same (i.e., like poles opposite each other). An annular bone magnetic gap 24 is formed between the bone magnetic circuit assembly 21 and the bone guide frame 20. A bone conduction coil 22 surrounds the outside of the magnetic plates 211 and is located within the bone magnetic gap 24 between the bone guide frame 20 and the bone magnetic circuit assembly 21. When alternating current is applied to the bone conduction coil 22, it drives the bone magnetic circuit assembly 21 to reciprocate, and the vibration is transmitted to the bone guide frame 20 and the faceplate 1001 through the spring 23. At least one or all of the magnetic plates 211 are surrounded by bone conduction coils 22. When all the magnetic plates 211 are surrounded by bone conduction coils 22, the number of bone conduction coils 22 corresponds to the number of magnetic plates 211. Optionally, at least two magnetic plates 211 are surrounded by a bone conduction coil 22 to increase the driving force of the bone conduction coils 22 and increase the volume. In other embodiments, only one magnetic plate 211 may be surrounded by a bone conduction coil 22.

[0127] Figure 14b , Figure 17a , Figure 18a , Figure 19a , Figure 20a , Figure 22a as well as Figure 22b A schematic diagram of the structure of a bone magnetic circuit assembly 21 according to some embodiments of this specification is shown.

[0128] Figure 14b , Figure 17a and Figure 22a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes a magnet 210 and two magnetic plates 211 arranged along the vibration direction A, with the two magnetic plates 211 connected to both sides of the magnet 210. A bone conduction coil 22 surrounds the exterior of each of the two magnetic plates 211. Figure 14b , Figure 17a and Figure 22a The difference in the structures shown is that, Figure 14b The magnetic plate 211 shown is provided with a boss 2113 and a recess 2114. Figure 17a The magnetic guide plate 211 shown has a boss 2113 but no recess 2114. Figure 22a and Figure 22b A gasket 26 is connected to the magnetic plate 211 shown. Figure 22a and Figure 22b The difference lies in the structure of the bone magnetic circuit component 21.

[0129] Figure 18a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes three magnets 210 arranged along the vibration direction A and two magnetic plates 211, with a magnetic plate 211 connecting adjacent magnets 210. Adjacent magnets 210 are arranged with their same poles facing each other. A bone conduction coil 22 surrounds the magnetic plate 211 located between adjacent magnets 210. Compared to a single-magnet structure, the three-magnet structure increases sensitivity.

[0130] Figure 19a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes three magnets 210 and four magnetic plates 211 arranged along the vibration direction A, with a magnet 210 connecting each adjacent magnetic plate 211. Adjacent magnets 210 are arranged with their same poles facing each other. A bone conduction coil 22 surrounds the outer edge of the magnetic plate 211 located between adjacent magnets 210. Because the outermost part of the bone magnetic circuit assembly 21 is the magnetic plate 211, magnetic leakage is reduced.

[0131] Figure 20a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes two magnets 210 arranged along the vibration direction A and three magnetic plates 211, with a magnet 210 connecting adjacent magnetic plates 211. Adjacent magnets 210 are arranged with their same poles facing each other. A bone conduction coil 22 surrounds the outer edge of the magnetic plate 211 located between adjacent magnets 210. Because the outermost part of the bone magnetic circuit assembly 21 is the magnetic plate 211, magnetic leakage is reduced.

[0132] It is understood that in other embodiments, the bone magnetic circuit assembly 21 may also include two magnets 210 arranged along the vibration direction A and a magnetic plate 211, with the two magnets 210 respectively connected to both sides of the magnetic plate 211, and a bone conduction coil 22 surrounding the outside of the magnetic plate 211.

[0133] The bone conduction magnetic circuit components 21 mentioned above can all be installed inside the bone conduction sound generating device 2 and assembled inside the sound generating unit 10, for example, Figure 15 and Figure 10c That is, respectively showing the... Figure 18a The bone conduction magnetic circuit assembly 21 shown is applied to the bone conduction sound generating device 2 and the sound generating unit 10.

[0134] The bone conduction support 20 of the bone conduction sound-generating device 2 will be illustrated with an example next.

[0135] The bone conduction scaffold 20 can be made of either a magnetic or non-magnetic material. The non-magnetic material can be a low-density, non-metallic material, such as plastic PC, ABS, PC+ABS, or PC+glass fiber. Using a non-magnetic material reduces the mass of the bone conduction sound generator 2 and decreases the stator mass, thereby improving the high-frequency sensitivity of the bone conduction sound generator 2. When the bone conduction scaffold 20 is made of a magnetic material (e.g., magnetic stainless steel), it increases the BL value (BL value reflects electromagnetic characteristics and is the product of magnetic field strength and coil wire length), reduces magnetic leakage, and improves mid-frequency sensitivity. Unless otherwise specified in this specification, the bone conduction scaffold 20 is made of a magnetic material. Optionally, the tensile strength of the magnetically conductive bone guide scaffold 20 is 430 MPa to 780 MPa, more preferably 450 to 600 MPa; the yield strength is >200 MPa; the elongation is >20%; and the chemical composition contains >50% iron and 15-20% chromium. This is beneficial for giving the bone guide scaffold 20 good strength, preventing breakage and deformation. The chromium content of the bone guide scaffold 20 helps improve corrosion resistance, strength and hardness, high-temperature performance, wear resistance, and magnetic conductivity, and also improves the effect of preventing magnetic leakage. For example, the material of the magnetically conductive bone guide scaffold 20 can be, for example, SUS430 and SUS304.

[0136] The following example illustrates the spring 23 of the bone conduction sound-generating device 2.

[0137] The number of spring clips 23 can be one, two, or more. In some embodiments, such as Figure 14a and Figure 14b As shown, the bone conduction sound-generating device 2 includes two spring plates 23, which are spaced apart along the vibration direction A. Optionally, the two spring plates 23 are respectively disposed at both ends of the bone conduction magnetic circuit assembly 21 along the vibration direction A, which can improve the stability of vibration and help prevent the bone conduction magnetic circuit assembly 21 from swinging (or rolling) during vibration, thereby reducing the risk of it impacting side components. The spring plate 23 is generally sheet-shaped, and its thickness B2 is 0.1mm to 0.25mm, and can be further selected as 0.13mm to 0.2mm. (Reference) Figure 21The spring piece 23 includes an outer frame 230, an inner frame 231 located inside the outer frame 230, and at least two elastic arms 232 connecting the outer frame 230 and the inner frame 231. The inner frame 231 is connected to the bone conduction magnetic circuit assembly 21. The outer frame 230 is connected to the bone conduction support 20. Optionally, the spring piece 23 is attached to the end face 202 of the bone conduction support 20. The outer frame 230 and the bone conduction support 20 can be connected by adhesive or welding. For example, the outer frame 230 and the end face 202 are connected by welding. The bonding strength of welding is better than that of adhesive bonding, making the elastic coefficient of the spring piece 23 more stable, which is beneficial to the stability of the low-frequency F0 of the bone conduction sound generating device 2. The welding method can be spot welding or wire welding, preferably wire welding. Wire welding can reduce welding slag, thereby preventing welding slag from entering the product and generating noise. The welding strength is stronger than spot welding or adhesive bonding, which is beneficial to enhancing reliability.

[0138] In some embodiments, reference Figure 21 The outer frame 230 is in a continuous ring shape. It is understood that the bone magnetic circuit assembly 21 can be composed of multiple parts connected together (split type), or, where structurally feasible, can be integrally magnetized. When composed of multiple parts, the magnet 210 and the magnetic plate 211 are independent parts, connected by adhesive or other means to form the bone magnetic circuit assembly 21. When the bone magnetic circuit assembly 21 is integrally magnetized, it is a single part (integral type), with the magnet 210 and magnetic plate 211 as part, not requiring a connecting process to form the bone magnetic circuit assembly 21. Therefore, integrally magnetized bone magnetic circuit assemblies 21 typically have higher dimensional accuracy. It should be noted that "integral type" for the bone magnetic circuit assembly 21 means that at least the magnet 210 and magnetic plate 211 constitute a single integral part. The spacer used to connect the bone magnetic circuit assembly 21 to the spring 23 can be an independent part or integrally formed with it. For example, Figure 17b , Figure 18b , Figure 19b and Figure 20b They respectively showed the same as Figure 17a , Figure 18a , Figure 19a and Figure 20a The diagram shows a schematic of a single-piece bone magnetic circuit assembly corresponding to a separate bone magnetic circuit assembly. Solid lines indicate the boundary between the two independent parts, while dashed lines indicate the boundary between different parts (magnetic plate 211 and magnet 210) within the single-piece assembly. Figure 18b and Figure 20b The spacer (shim 26) is a separate part. Figure 17b and Figure 19bThe spacer (protrusion 2113) is integrated with the bone magnetic circuit assembly. For the method of integrated magnetization, please refer to the patent document with application number 202111062238.3, the entire contents of which are incorporated herein by reference.

[0139] The following example illustrates the air-conducting sound-generating device 3 of the sound-generating unit 10.

[0140] In some embodiments, such as Figures 23 to 25 , Figures 29 to 32 As shown, the air-conducting sound-generating device 3 includes an annular air-conducting support 30 and an air-conducting magnetic circuit assembly 31 and a diaphragm assembly 32, both connected to the air-conducting support 30. The air-conducting support 30 can be made of a lightweight material (e.g., plastic) to reduce the mass and density of the air-conducting sound-generating device 3. Optionally, the air-conducting support 30 is non-magnetic. The diaphragm assembly 32 includes an air-conducting coil 320 located within the magnetic field of the air-conducting magnetic circuit assembly 31 and a diaphragm 321 connected between the air-conducting coil 320 and the air-conducting support 30. When an alternating current is passed through the air-conducting coil 320, it will generate an interaction force with the magnetic field of the air-conducting magnetic circuit assembly 31, thereby driving the diaphragm 321 to vibrate.

[0141] Next, we will first give an example of the air-conducting magnetic circuit component 31 of the air-conducting sound-generating device 3.

[0142] The air-conducting magnetic circuit assembly 31 includes at least a magnetically conductive support 310 connected to the bottom of the air-conducting bracket 30, a main magnet 311 disposed on the surface of the magnetically conductive support 310 facing the diaphragm assembly 32, and a main pole core plate 313 connected to the main magnet 311.

[0143] The magnetically conductive support 310 is made of a magnetically conductive material and includes a plate-shaped magnetically conductive base plate 3100. Optionally, the thickness of the magnetically conductive base plate 3100 is 0.3–0.6 mm to provide good magnetic conductivity and help prevent magnetic leakage. In some embodiments, reference is made to… Figure 25 and Figure 30 The magnetic support member 310 also includes a magnetic side plate 3101 protruding from the side edge of the magnetic base plate 3100 toward the diaphragm assembly 32. The magnetic side plate 3101 extends at least partially to be disposed opposite to the main pole core plate 313, and there is a gap between it and the main pole core plate 313, thereby forming an air-conducting magnetic gap 315. Optionally, the magnetic base plate 3100 is rectangular, and the magnetic side plate 3101 can be provided on only two opposite sides of the magnetic base plate 3100, or on all four sides of the magnetic base plate 3100. A magnetic ring 3102 can also be provided on the magnetic base plate 3100. Figures 26 to 28 This is a top view of the magnetic support member 319 according to some embodiments of the present invention, so as to show the position and number of the magnetic side plates 3101. Figure 26In the illustrated embodiment, a magnetically conductive side plate 3101 is provided at each of the two short sides of the magnetically conductive base plate 3100. Figure 27 In the illustrated embodiment, a magnetically conductive side plate 3101 is provided on each of the two long sides of the magnetically conductive base plate 3100. Figure 28 In the illustrated embodiment, a magnetically conductive side plate 3101 is provided on each of the four sides of the magnetically conductive base plate 3100. It is understood that, in addition to being relatively independent, each magnetically conductive side plate 3101 can also be connected in a ring shape; in some embodiments, such as... Figures 29 to 32 As shown, Figure 30 yes Figure 29 The cross-sectional view of the air-conducting sound-generating device 2 shown. Figure 31 yes Figure 30 Enlarged view of Part III, Figure 32 yes Figure 29 The image shows a perspective view of the magnetic support 310, main magnet 311, and main pole plate 313 connected together. The magnetic support 310 includes a magnetic base plate 3100 and a magnetic ring 3102 protruding from the side edge of the magnetic base plate 3100 toward the diaphragm assembly 32. The magnetic ring 3102 is formed by connecting four magnetic side plates 3101. The magnetic ring 3102 surrounds the outside of the main pole plate 313, forming an air-conducting magnetic gap 315, into which an air-conducting coil 320 extends.

[0144] In some embodiments, reference Figure 33 , Figure 33 For along Figure 25 The cross-sectional view obtained by the JJ section line shows that the air-conducting magnetic circuit assembly 31 also includes a secondary magnet 312 connected to the magnetically conductive base plate 3100 to increase the BL value of the air-conducting coil 320. The number of secondary magnets 312 can be one or more. Optionally, the number of secondary magnets 312 is even, with two opposing secondary magnets 312 located on opposite sides of the main magnet 311. In some embodiments, the air-conducting magnetic circuit assembly 31 also includes a secondary pole plate 314 connected to the secondary magnets 312. Optionally, at least one secondary pole plate 314 is connected to the surface of each secondary magnet 312 facing the diaphragm assembly 32 to improve the magnetic conductivity. The secondary pole core plate 314 and the main pole core plate 313 are at least partially arranged opposite each other, and an air-conducting magnetic gap 315 is formed between the secondary pole core plate 314 and the main pole core plate 313. Optionally, the distance between each secondary magnet 312 and the main magnet 311 is the same. Further optionally, the distance between each secondary pole core plate 314 and the main pole core plate 313 is the same, so that the air-conducting magnetic gap 315 is basically of equal width and the magnetic field distribution in the magnetic gap is more uniform. Figures 34 to 36 This is a top view of the air-conducting magnetic circuit assembly 31 to show the position and number of the sub-pole core plate 314 and the sub-magnet 312. Figure 34 In the illustrated embodiment, a secondary magnet 312 and a secondary pole plate 314 are respectively provided at the two short sides of the magnetic base plate 3100. Figure 35In the illustrated embodiment, a secondary magnet 312 and a secondary pole plate 314 are respectively provided on the two long sides of the magnetic base plate 3100. Figure 36 In the illustrated embodiment, a secondary magnet 312 and a secondary pole plate 314 are respectively provided on each of the four sides of the magnetically conductive base plate 3100. Optionally, the two ends of the secondary pole plate 314 extend beyond the two ends of the secondary magnet 312 in the length direction to further improve the magnetic conductivity. The distance L9 by which the secondary pole plate 314 extends beyond the secondary magnet 312 in the length direction can be 0.03 to 0.2 mm. Optionally, the two ends of the secondary pole plate 314 extend beyond the secondary magnet 312 by the same distance.

[0145] The magnetic poles of the main magnet 311 are arranged along the vibration direction B of the air-conducting sound-generating device 3, and the magnetic poles of the auxiliary magnet 312 are also arranged along the vibration direction B, but in the opposite direction to the magnetic poles of the main magnet 311. It can be understood that the vibration direction B of the air-conducting sound-generating device 3 is consistent with the vibration direction of the diaphragm 321. The auxiliary magnet 312 enhances the magnetic field strength and increases the BL value, thereby improving the sensitivity of the air-conducting sound-generating device 3. The auxiliary pole core plate 314 guides the magnetic field lines, and its cooperation with the main pole core plate 313 allows the magnetic field lines of the main magnet 311 and the auxiliary magnet 312 to pass more concentratedly through the air-conducting coil 320 of the diaphragm assembly 32, improving the driving force and sensitivity.

[0146] It is understood that a magnetically conductive side plate 3101 may or may not be provided on the outer side of the auxiliary magnet 312. Optionally, when the auxiliary magnet 312 is provided on one side of the main magnet 311, the magnetically conductive side plate 3101 is not provided on that side to reduce weight and size. In some embodiments, such as Figure 37 As shown, Figure 37 It shows Figure 23 A schematic diagram of the air-conducting magnetic circuit assembly 31 of the air-conducting sound-generating device 3. Magnetic guide plates 3101 are provided on both short sides of the magnetic base plate 3100, but not on the long side. A secondary magnet 312 is correspondingly provided on the long side of the magnetic base plate 3100. Optionally, the distance between the magnetic guide plate 3101 and the main pole core plate 313 is the same as the distance between the secondary pole core plate 314 and the main pole core plate 313, so that the width of the air-conducting gap 315 around the main magnet 311 is consistent, resulting in more balanced vibration.

[0147] The diaphragm assembly 32 of the air-conducting sound-generating device 3 will be illustrated with an example next.

[0148] like Figure 31 , Figure 38 , Figure 39 and Figure 40As shown, the diaphragm 321 includes an outer ring plate 3210 connected to the air conduction support 30, a flat intermediate plate 3211 located within the outer ring plate 3210, and a folded ring portion 3212 located between the outer ring plate 3210 and the intermediate plate 3211, the folded ring portion 3212 sealing the area between the outer ring plate 3210 and the intermediate plate 3211. The outer ring plate 3210 can be directly or indirectly connected to the air conduction support 30, and the two are relatively fixed. The cross-section of the folded ring portion 3212 is arc-shaped, and it can be recessed towards the side where the air conduction magnetic circuit assembly 31 is located (see reference). Figure 38 and Figure 40 It can also protrude in the direction away from the side where the air-conducting magnetic circuit assembly 31 is located (see reference). Figure 31 and Figure 39 Optionally, the outer ring 3210 is connected to the end face 300 of the air conduction support 30, for example, by adhesive bonding (e.g., glue bonding or double-sided tape bonding).

[0149] One end of the air-conducting coil 320 is connected to the middle plate 3211 of the diaphragm 321, and the other end extends into the air-conducting magnetic gap 315. It surrounds the outside of the main pole core plate 313 and is located inside the magnetically conductive side plate 3101. The main pole core plate 313 and the magnetically conductive side plate 3101 can guide and converge magnetic field lines, making the magnetic field lines pass through the coil more concentratedly and evenly, thereby improving sensitivity and driving force. When an alternating current is passed through the air-conducting coil 320, it will reciprocate under the interaction with the magnetic field, thereby driving the diaphragm 321 to vibrate, and the diaphragm 321 drives the air to vibrate and produce sound.

[0150] In some embodiments, reference Figure 25 and Figure 39 To enhance the strength of the intermediate sheet 3211 and improve the sound quality, the diaphragm assembly 32 further includes a reinforcing sheet 3213 attached to the surface of the intermediate sheet 3211. The material of the reinforcing sheet 3213 can be the same as or different from the material of the diaphragm 321. Optionally, the reinforcing sheet 3213 and the intermediate sheet 3211 have the same shape and area, and its projection along the thickness direction of the reinforcing sheet 3213 coincides with that of the intermediate sheet 3211, so as to comprehensively reinforce the intermediate sheet 3211. Optionally, the thickness of the reinforcing sheet 3213 is 0.08-0.3 mm, and the material of the reinforcing sheet 3213 is a polymer, a metal, or a composite of a polymer and a metal. The polymer can be, for example, polyethylene, polypropylene, polyester, polyetherimide, polyethylene terephthalate, carbon fiber composite material, or pulp fiber composite material; the metal can be, for example, aluminum, aluminum alloy, titanium, titanium alloy, a composite of aluminum-based material and foamed material, or a composite of titanium-based material and foamed material. Composites of polymers and metals can be, for example, aluminum-layered carbon fiber composites. It is understood that when the reinforcing sheet 3213 is provided, the intermediate sheet 3211 may not be fully enclosed, such as... Figure 39As shown, Figure 39 This is an exploded view of a diaphragm 321 and a reinforcing sheet 3213 according to one embodiment. The intermediate sheet 3211 has an opening 32110 in the middle. After the reinforcing sheet 3213 is connected to the intermediate sheet 3211, the opening is sealed, which can reduce the weight of the diaphragm assembly 32.

[0151] The magnetic base plate 3100 and / or magnetic side plate 3101 of the magnetic support member 310 are provided with at least one opening to allow the interior of the air-conducting sound-generating device 3 to communicate with the interior of the housing assembly 100, enabling smooth airflow. Optionally, the total area of ​​all the vent holes 3c of the magnetic support member 310 is 2 to 15 mm². 2 This is to ensure airflow while minimizing the adverse effects of the vent holes 3c on preventing magnetic leakage. Optionally, the total area of ​​all vent holes 3c is 4–12 mm². 2 To further ensure the effectiveness.

[0152] Figure 10a and Figure 10b In the illustrated embodiment, the magnetic base plate 3100 of the air-conducting sound-generating device 3 is disposed opposite to the bone-conducting support 20 of the bone-conducting sound-generating device 2. The magnetic base plate 3100 is closer to the bone-conducting sound-generating device 2 than the diaphragm assembly 32, and can play a certain magnetic shielding role, thereby effectively reducing mutual interference of leakage magnetic field. When the bone-conducting support 20 is also magnetic, the magnetic shielding effect can be further improved.

[0153] It should be noted that, in the absence of conflict, the various embodiments described herein can be combined with each other to obtain more implementation schemes.

[0154] The above are merely specific embodiments of this utility model. Any improvements made based on the concept of this utility model shall be considered within the scope of protection of this utility model.

Claims

1. A sound-generating unit, characterized in that, include: The housing assembly (100) has a sound outlet (1003); A bone conduction sound-emitting device (2) is disposed within the housing assembly (100); and, An air-conducting sound-generating device (3) is disposed within the housing assembly (100). The air-conducting sound-generating device (3) includes a diaphragm assembly (32), which includes a diaphragm (321). The housing assembly (100) includes a front cavity (10042) and a rear cavity (10044) separated by the diaphragm (321). The sound outlet (1003) communicates with the front cavity (10042). The geometric center O1 of the projection of the outer contour of the sound outlet (1003) on the inner wall of the housing assembly (100) along the vibration direction B of the air-conducting sound generating device (3) onto a plane perpendicular to the vibration direction B, and the geometric center O2 of the projection of the diaphragm (321) along the vibration direction B onto the same plane do not coincide.

2. The sound-generating unit as described in claim 1, characterized in that, The distance between the geometric center O1 and the geometric center O2 is 0.1mm to 8mm.

3. The sound-generating unit as described in claim 2, characterized in that, The distance between the geometric center O1 and the geometric center O2 is 1mm to 4mm.

4. The sound-generating unit as described in claim 1, characterized in that, When the sound-emitting unit is worn, the outer shell assembly (100) has a proximal end (10040) near the human ear, and the proximal end (10040) is provided with the sound outlet (1003); When the sound-generating unit is worn, the geometric center O1 is offset toward the ear relative to the geometric center O2.

5. The sound-generating unit as described in claim 4, characterized in that, The housing assembly (100) includes a face cover (1001) for contact with facial skin, the geometric center O1 being offset relative to the geometric center O2 towards the side closer to the face cover (1001).

6. The sound-generating unit as described in claim 1, characterized in that, The outer casing assembly (100) includes a housing (1000) and a face cover (1001) connected to the housing (1000), the face cover (1001) being for contact with facial skin, the housing (1000) including a side shell portion (1004), the side shell portion (1004) having the front cavity (10042) and the sound outlet (1003).

7. The sound-generating unit as described in claim 1, characterized in that, The sound-generating unit is connected to the wearing mechanism (11), which includes an ear hook (111) connected to the outer shell assembly (100), and the geometric center O1 is biased relative to the geometric center O2 towards the connection point (111a) between the ear hook (111) and the outer shell assembly (100).

8. The sound-generating unit as described in claim 1, characterized in that, The number of the sound outlet holes (1003) is one or more, and the total area of ​​all the sound outlet holes (1003) is 10 mm². 2 ~130mm 2 .

9. The sound-generating unit as described in claim 8, characterized in that, The total area of ​​all the aforementioned sound outlets (1003) is 40 mm². 2 ~100mm 2 .

10. The sound-generating unit as described in claim 1, characterized in that, At least one of the sound outlets (1003) is elongated and is arranged in a direction parallel to the contact surface (10010) of the housing assembly (100) for contact with facial skin, or at an angle not exceeding 15° between the parallel direction and the contact surface (10010).

11. The sound-generating unit as described in claim 10, characterized in that, The length L11 of the sound outlet (1003) is 3mm to 15mm, and the width W4 is 0.8mm to 8mm.

12. The sound-generating unit as described in claim 1, characterized in that, The length direction of the air-conducting sound-generating device (3) is set along the length direction X of the sound-generating unit (10).

13. The sound-generating unit according to any one of claims 1 to 12, characterized in that, The vibration direction A of the bone conduction sound-generating device (2) and the angle α1 between the outer shell assembly (100) and the contact surface (10010) for contacting the facial skin are 60° to 90°.

14. The sound-generating unit as described in claim 13, characterized in that, The vibration direction B of the air-conducting sound-generating device (3) and the contact surface (10010) of the outer shell assembly (100) for contacting the facial skin have an angle α2 of 0° to 45°.

15. The sound-generating unit as described in claim 14, characterized in that, The axial direction C of the sound outlet (1003) is parallel to or inclined relative to the contact surface (10010) of the housing assembly (100) for contacting facial skin. The included angle α3 between the axial direction C of the sound outlet (1003) and the contact surface (10010) is 0° to 45°. When the included angle α3 is greater than 0°, the positive direction of the axial direction C of the sound outlet (1003) points to the side where the contact surface (10010) is located.

16. The sound-generating unit as described in claim 14, characterized in that, The axial direction C of the sound outlet (1003) is consistent with the vibration direction B of the air-conducting sound-generating device (3); or, The angle α3 between the axial direction C of the sound outlet (1003) and the contact surface (10010) of the housing assembly (100) for contacting facial skin is greater than the angle α2 between the vibration direction B of the air-conducting sound generating device (3) and the contact surface (10010).

17. The sound-generating unit as described in any one of claims 1 to 12, characterized in that, The volume of the front cavity (10042) is 10 mm. 3 ~250mm 3 .

18. The sound-generating unit as described in claim 17, characterized in that, The housing assembly (100) also includes through holes (10000) connecting its inner and outer sides, and the total area of ​​all the through holes (10000) is 1 mm². 2 ~80mm 2 .

19. The sound-generating unit according to any one of claims 1 to 12, characterized in that, The bone conduction sound-generating device (2) includes: Bone guide scaffold (20), wherein the bone guide scaffold (20) is annular; A bone conduction magnetic circuit assembly (21) is disposed within the bone conduction support (20) and includes at least one magnet (210) and at least two magnetic plates (211). The magnet (210) is connected between two adjacent magnetic plates (211). The magnetic poles of the magnet (210) are arranged along the vibration direction A of the bone conduction sound generating device (2). When the number of magnets (210) is greater than or equal to two, the two magnets (210) are arranged opposite each other with the same pole. A bone conduction coil (22) is disposed within the bone conduction support (20) and fixed relative to the bone conduction support (20); at least one of the magnetic plates (211) is surrounded by a bone conduction coil (22); and, A spring (23) is connected between the bone magnetic circuit assembly (21) and the bone guide frame (20).

20. The sound-generating unit as described in claim 19, characterized in that, The air-conducting sound-generating device (3) includes: An air-conducting stent (30) is annular; An air-conducting magnetic circuit assembly (31), disposed within the air-conducting support (30), includes a magnetically conductive base plate (3100) and a main magnet (311) and a main pole core plate (313) connected to the magnetically conductive base plate (3100). The air-conducting magnetic circuit assembly (31) also includes a magnetically conductive side plate (3101) connected to the magnetically conductive base plate (3100) and / or a secondary magnet (312) connected to the magnetically conductive base plate (3100) and a secondary pole core plate (314) connected to the secondary magnet (312). An air-conducting magnetic gap (315) is formed between the magnetically conductive side plate (3101) and / or the secondary pole core plate (314) and the main pole core plate (313). The magnetic poles of the main magnet (311) and the secondary magnet (312) are arranged along the vibration direction B of the air-conducting sound-generating device (3), and their magnetic pole arrangement directions are opposite. The diaphragm assembly (32) includes an air-conducting coil (320) connected to the diaphragm (321), the diaphragm (321) being connected to the air-conducting support (30), and the air-conducting coil (320) being located within the air-conducting magnetic gap (315).

21. The sound-generating unit as described in claim 20, characterized in that, The diaphragm assembly (32) is closer to the bone conduction sound generator (2) than the magnetic base plate (3100), and the air conduction sound generator (3) is provided with a vent (3c) connecting its interior and exterior; or, The magnetic base plate (3100) is closer to the bone conduction sound device (2) than the diaphragm assembly (32), and the bone conduction support (20) is made of magnetic material.

22. A head-mounted sound-generating device, characterized in that, It includes a sound-generating unit (10) as described in any one of claims 1 to 21 and a wearing mechanism (11) for wearing the sound-generating unit (10) on the human head.

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