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 comprises a shell with an opening at one end and a surface cover connected with the opening end of the shell, and the shell is provided with a sound outlet hole; the bone conduction sound production device and the air conduction sound production device are both arranged in the shell assembly and arranged in the length direction of the shell assembly, and the air conduction sound production device produces sound outwards through the sound outlet hole; wherein the bone conduction sound production device and the air conduction sound production device are arranged in the width direction of the shell assembly, the air conduction sound production device is arranged on one side of the width direction of the bone conduction sound production device, the air conduction sound production device faces or is opposite to the bone conduction sound production device, and the distance between the bone conduction sound production device and the air conduction sound production device is 0.3 mm-6 mm. The arrangement of the air conduction sounding device and the bone conduction sounding device is more reasonable, the magnetic flux leakage interference between the air conduction sounding device and the bone conduction sounding device is reduced, and the wearing comfort and the sound listening effect are 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] The utility model relates to the technical field of sound-generating devices, in particular to a sound-generating unit and a head-mounted sound-generating device. Background Art

[0003] Head-mounted sound-generating devices, such as headphones and smart glasses, all include sound-generating devices that can produce sound. According to the different ways of sound transmission, the sound-generating devices can be divided into bone conduction sound-generating devices and air conduction sound-generating devices.

[0004] A bone conduction device typically consists of a coil and a magnetic circuit assembly. Powering the coil drives the magnetic circuit assembly to vibrate. The device is typically connected to a housing (such as the headphone housing), transmitting the vibrations through the housing to the skin on the face, allowing the user to hear the sound.

[0005] An air-conducted sound-generating device typically includes a diaphragm, a coil connected to the diaphragm, and a magnetic circuit assembly that provides a magnetic field. When the coil is energized, the diaphragm vibrates under the interaction with the magnetic force of the magnetic circuit assembly, thereby stirring the air to produce sound.

[0006] With the development of technology, head-mounted sound equipment has become more mature and complete, but there are still some areas for improvement to meet users' higher demands for head-mounted sound equipment.

[0007] For example, conventional headphones typically only have one bone conduction device or one air conduction device, which can only produce sound through bone conduction or air conduction, resulting in a relatively simple sound generation method. The applicant's research has found that if both a bone conduction device and an air conduction device are installed in a single sound generation unit, it can help improve the sound generation effect and expand the sound generation methods. However, installing both a bone conduction device and an air conduction device may make the sound generation unit too heavy or too large, affecting wearing comfort.

[0008] For another example, when a bone conduction sound generator and an air conduction sound generator are set up at the same time, the magnetic fields leaked from the bone conduction sound generator and the air conduction sound generator may have an adverse effect on the operation of each other and external electronic components.

[0009] In short, there is still room for improvement in many aspects of head-mounted sound devices, such as sound quality (or listening effect, sound effect), wearing comfort, reliability of use and privacy (preventing sound leakage).

[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 the present invention is to provide a sound unit and a head-mounted sound device, which are conducive to improving the sound effect thereof, and the volume of the sound unit is not too large.

[0012] To achieve the above-mentioned purpose of the utility model, on the one hand, the utility model proposes a sound unit, comprising:

[0013] The housing assembly comprises a shell with an open end and a cover connected to the open end of the shell, wherein the shell is provided with a sound outlet hole;

[0014] a bone conduction sound generating device, disposed within the housing assembly and connected to the face cover, the bone conduction sound generating device being disposed along the length of the housing assembly, with the positive direction of its vibration direction A pointing toward the contact surface between the face cover and the human body;

[0015] An air conduction sound-generating device is provided in the housing assembly and is connected to the shell, the air conduction sound-generating device is arranged along the length direction of the housing assembly, and the air conduction sound-generating device emits sound outward through the sound outlet hole;

[0016] The bone conduction sound emitting device and the air conduction sound emitting device are arranged along the width direction of the shell assembly, and the air conduction sound emitting device is arranged on one side of the width direction of the bone conduction sound emitting device, and the air conduction sound emitting device is arranged facing or back to the bone conduction sound emitting device, and the distance between the bone conduction sound emitting device and the air conduction sound emitting device is 0.3 mm to 6 mm.

[0017] On the other hand, the present invention provides a head-mounted sound-emitting device, comprising the sound-emitting unit as described above and a wearing mechanism for wearing the sound-emitting unit on a human head.

[0018] Compared to the prior art, the present invention has the following beneficial effects: the sound-producing unit of the head-mounted sound-producing device includes both a bone conduction sound-producing device and an air conduction sound-producing device, enabling the use of both devices to produce sound, thereby increasing the diversity of sound production methods and the listening experience. Furthermore, the bone conduction sound-producing device and the air conduction sound-producing device are arranged along the length of the housing assembly, with the air conduction sound-producing device located to one side of the bone conduction sound-producing device in the width direction. The air conduction sound-producing device and the bone conduction sound-producing device are arranged along the width direction of the sound-producing unit, with the air conduction sound-producing device positioned facing or facing away from the bone conduction sound-producing device. The arrangement of the air conduction sound device and the bone conduction sound device can be made more reasonable, the structure can be more compact, space can be saved, and the volume of the sound unit can be not too large. The sound unit can have a suitable shape and will not be uncomfortable to wear due to being too long or too wide, and it is conducive to the air conduction sound device to be close to the ear for sound production; in addition, the distance between the bone conduction sound device and the air conduction sound device is 0.3mm to 6mm, which can reduce the vibration and leakage magnetic interference between the two, and will not make the width of the sound unit too large. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a head-mounted sound-generating device in some embodiments of the present invention.

[0020] Figure 2 It is a schematic diagram of the angle between the side surface of the functional compartment and the contact surface of the sound unit in some embodiments of the present invention.

[0021] Figure 3 It is a schematic diagram of the sound-emitting unit of some embodiments of the present invention.

[0022] Figure 4 1 is a schematic cross-sectional view of a sound unit in some embodiments of the present invention, in which the housing is integral.

[0023] Figure 5 1 is a schematic cross-sectional view of the sound unit of some embodiments of the present invention. In the figure, the shell is split.

[0024] Figure 6 It is a schematic structural diagram of the sound-emitting unit in some embodiments of the present invention.

[0025] Figure 7 yes Figure 6 An exploded view of the sound unit is shown.

[0026] Figure 8a yes Figure 6 A schematic cross-sectional view of the sound unit shown.

[0027] Figure 8b It is a schematic structural diagram of the sound-emitting unit in some embodiments of the present invention.

[0028] Figure 8c This is a schematic diagram of the structure of the sound unit in some embodiments of the present invention. In the figure, the structure of the bone conduction magnetic circuit component is the same as Figure 15a Consistent in.

[0029] Figure 8d 1 is a frequency response graph of sound units with through holes of different total area sizes in some embodiments of the present invention.

[0030] Figure 9 It is a schematic cross-sectional view of the sound-emitting unit of some embodiments of the present invention.

[0031] Figure 10 This is a frequency response curve diagram of some embodiments of the present invention when the sound unit has front cavities of different volumes.

[0032] Figure 11a It is a schematic structural diagram of the bone conduction sound generating device of some embodiments of the present invention.

[0033] Figure 11b yes Figure 11a A cross-sectional schematic diagram of the bone conduction sound device shown.

[0034] Figure 12 This is a cross-sectional view of the bone conduction sound generating device in some embodiments of the present invention. Figure 15a Consistent in.

[0035] Figure 13 Schematic diagram of the structure of the bone conduction sound generating device of some embodiments of the present invention. In the figure, the bone conduction support is in the shape of a runway.

[0036] Figure 14a It is a schematic structural diagram of the bone magnetic circuit assembly of some embodiments of the present invention.

[0037] Figure 14b yes Figure 14a The bone magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0038] Figure 15a It is a schematic structural diagram of the bone magnetic circuit assembly of some embodiments of the present invention.

[0039] Figure 15b yes Figure 15a The bone magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0040] Figure 16a It is a schematic structural diagram of the bone magnetic circuit assembly of some embodiments of the present invention.

[0041] Figure 16b yes Figure 16aThe bone magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0042] Figure 17a It is a schematic structural diagram of the bone magnetic circuit assembly of some embodiments of the present invention.

[0043] Figure 17b yes Figure 17a The bone magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0044] Figure 18 yes Figure 11a Schematic diagram of the structure of the shrapnel.

[0045] Figure 19 It is a schematic structural diagram of the spring pieces in some embodiments of the present invention.

[0046] Figure 20 It is a schematic structural diagram of the spring pieces in some embodiments of the present invention.

[0047] Figure 21 It is a cross-sectional view of the spring pieces in some embodiments of the present invention.

[0048] Figure 22 This is a cross-sectional view of a bone conduction sound generating device in some embodiments of the present invention. In the figure, the structure of the bone conduction magnetic circuit component is Figure 15a Consistent in.

[0049] Figure 23a It is a cross-sectional view of the bone conduction sound generating device of some embodiments of the present invention.

[0050] Figure 23b This is a cross-sectional view of the bone conduction sound generating device in some embodiments of the present invention. The structure of the bone conduction magnetic circuit component in the figure is the same as that in the embodiment of the present invention. Figure 15a Consistent in.

[0051] Figure 24 It is a schematic structural diagram of the air conduction sound generating device of some embodiments of the present invention.

[0052] Figure 25 yes Figure 24 A top view of the air conduction sound generating device is shown.

[0053] Figure 26 It is along Figure 25 Sectional view obtained by cutting along the MM cutting line.

[0054] Figure 27 It is a top view of the magnetic support member of some embodiments of the present invention.

[0055] Figure 28 It is a top view of the magnetic support member of some embodiments of the present invention.

[0056] Figure 29 It is a top view of the magnetic support member of some embodiments of the present invention.

[0057] Figure 30 It is a schematic structural diagram of the air conduction sound generating device of some embodiments of the present invention.

[0058] Figure 31 yes Figure 30 A cross-sectional view of the air conduction sound generating device shown.

[0059] Figure 32 yes Figure 31 Enlarged view of part III.

[0060] Figure 33 yes Figure 30 The diagram shows the positions of the magnetic support, main magnet and main pole core plate of the air conduction sound generating device.

[0061] Figure 34 It is along Figure 26 Sectional view obtained by cutting line JJ.

[0062] Figure 35 It is a schematic diagram of the positions of the magnetic support, auxiliary magnet and auxiliary pole core plate in some embodiments of the present invention.

[0063] Figure 36 It is a schematic diagram of the positions of the magnetic support, auxiliary magnet and auxiliary pole core plate in some embodiments of the present invention.

[0064] Figure 37 It is a schematic diagram of the positions of the magnetic support, auxiliary magnet and auxiliary pole core plate in some embodiments of the present invention.

[0065] Figure 38 yes Figure 26 The schematic diagram of the structure of the air-conducting magnetic circuit component of the air-conducting sound-generating device shown.

[0066] Figure 39 yes Figure 26 Enlarged view of part II.

[0067] Figure 40 yes Figure 30 Exploded diagram of the diaphragm assembly.

[0068] Figure 41 yes Figure 24 Schematic diagram of the structure of the diaphragm assembly. DETAILED DESCRIPTION

[0069] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0070] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0071] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0072] The area of a hole mentioned in this article refers to the area of the region enclosed by the outer contour of the hole.

[0073] Unless otherwise specified, the dimensions or dimension ranges such as "length", "width", "height", "thickness", and "wall thickness" mentioned in this article refer to the dimensions or dimension ranges of the largest part in the corresponding direction.

[0074] The embodiments of this specification describe a head-mounted sound-emitting device that can be worn on a human head and enables a person to hear sound, for example, by bone conduction and / or air conduction. The head-mounted sound-emitting device includes a sound-emitting unit 10 and a wearing mechanism 11 connected to the sound-emitting unit 10. The sound-emitting unit 10 is used to emit sound, and the wearing mechanism 11 is used to wear the sound-emitting unit 10 on a human head so that the sound can be easily heard by a person. Exemplarily, the sound-emitting unit 10 is worn to a position corresponding to a human ear, for example, directly inserted into the ear or located near the front of the ear.

[0075] In some embodiments, the wearing mechanism 11 may be in the shape of a ring with an opening (e.g., a U-shape), which is mounted on the top of the user's head to achieve wearing. In some embodiments, the wearing mechanism 11 may include an ear hook, which is curved and can be hung above the user's ear. In some embodiments, the wearing mechanism 11 may include a curved back hook and an ear hook suitable for hooking above the human ear, and the back hook is suitable for wrapping around the back of the human head. In some embodiments, the wearing mechanism 11 may also be a frame structure, which includes temples located on both sides of the head, and the sound-emitting unit 10 may be connected to the temples.

[0076] In some embodiments, the head-mounted sound-emitting device includes a sound-emitting unit 10, which is worn on the left or right ear of a person. For example, when the head-mounted sound-emitting device is a single-ear headset, it only includes one sound-emitting unit 10, and may also have an ear hook that is hooked on the ear. In other embodiments, the head-mounted sound-emitting device includes two sound-emitting units 10, which are respectively worn on the left and right ears of a person. For example, the head-mounted sound-emitting device can be a binaural headset or glasses, etc., in which case it includes two sound-emitting units. Depending on the product, the head-mounted sound-emitting device may also include a back hook and ear hook or a glasses frame.

[0077] The following description uses a binaural headset as an example.

[0078] like Figure 1 As shown, Figure 1 The head-mounted sound device shown in the figure is a binaural headset, which includes two sound units 10 (or earphone heads), and also includes a back hanger 110 suitable for wrapping around the back of the head, two ear hangers 111 suitable for hooking on the ears, and two functional compartments, the functional compartments being used to accommodate a control circuit board and / or a battery. For example, the two functional compartments are a control compartment 112 for accommodating a control circuit board and a battery compartment 113 for accommodating a battery. For another example, each functional compartment accommodates a control circuit board and / or a battery. The back hanger 110 is connected between the two functional compartments, and the two sound units 10 are respectively arranged corresponding to the two functional compartments. The sound units 10 and the corresponding functional compartments are connected via ear hangers 111. Specifically, the back hanger 110 is connected between the control compartment 112 and the battery compartment 113. The control compartment 112 and one of the sound units 10, as well as the battery compartment 113 and the other sound unit 10, are both connected via an ear hanger 111. It can be understood that the rear hook 110, the ear hook 111 and the two functional compartments together constitute the wearing mechanism 11 of the earphone.

[0079] It is understandable that although this specification introduces binaural headphones as an example, the head-mounted sound device is not limited to binaural headphones. For example, it can also be hearing aids, audio glasses, smart helmets, VR devices, AR devices and other electronic devices.

[0080] The head-mounted sound device is symmetrical as a whole to improve wearing comfort. Figure 1 and Figure 2 As shown, the functional compartment has a side surface 1123 facing the human body when the head-mounted sound-emitting device is worn, and the sound-emitting unit 10 has a contact surface 10010 in contact with the human skin when the head-mounted sound-emitting device is worn. The angle β1 formed between the side surface 1123 and the contact surface 10010 toward the side where the head is located is an obtuse angle, so that the contact surface 10010 is deflected toward the side where the head is located relative to the side surface 1123 by a certain angle. Optionally, the angle β1 ranges from 160° to 170°. When the head-mounted sound-emitting device is worn on the human head, since the contact surface 10010 is deflected toward the face, the ear hook 111 and the functional compartment will be deflected to a certain extent toward the side away from the head after wearing, which is conducive to forming a certain gap between the ear hook 111 and the skin of the head. The gap forms a space for placing the temples of the glasses, so that when the user wears glasses, the temples of the glasses and the ear hooks of the headphones, especially the bent parts, do not interfere or interfere less, making it more convenient to wear glasses and headphones at the same time, thereby enhancing the stability of wearing glasses. In addition, the functional compartment can press against the back of the external ear, and the sound unit 10 deflects toward the side of the head, sticking closer to the facial skin, ensuring the stability of the earphones. When the angle β1 is in the range of 160° to 170°, it can also prevent the sound unit 10 from being excessively deflected, causing it to be difficult or uncomfortable to wear.

[0081] Further optionally, the lower end 10010a of the contact surface 10010 is farther from the side surface 1123 than the upper end 10010b thereof, that is, the sound unit 10 is deflected upward as a whole, so that the contact surface 10010 fits more closely to the facial skin, which is beneficial to improving the sound transmission effect and can better ensure the formation of a gap to accommodate the temples.

[0082] It should be noted that when defining the angle between two surfaces in this article, the surface may be a plane or a curved surface. When the surface is a plane, the angle with the surface is the angle with the plane on which the surface is located. When the surface is a curved surface, the angle with the plane is the angle with the plane on which the surface is located. Figure 3 The most convex or concave point of the arc surface has a tangent plane 10011. In this case, the angle with the surface can be understood as the angle with the tangent plane 10011. For example, when the contact surface 10010 and the side surface 1123 are both planes, the angle β1 is the angle between the two planes. When 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.

[0083] Next, the sound unit of the head-mounted sound device is described with examples.

[0084] The sound 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 housing 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 formed, and the face cover 1001 contacts the facial skin when worn. Optionally, a soft layer (not shown) is provided on the outside of the face cover 1001 to improve the comfort when in contact with the face. The material of the soft layer can be, for example, silicone. It is understandable that the surface of the face cover 1001 that is in contact with 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, which includes a side shell portion 1004 and a back cover 1002. The face cover 1001 and the back cover 1002 are arranged opposite to each other, and the two respectively seal the two open ends of the side shell portion 1004. Optionally, the side shell portion 1004 is tubular. The side shell portion 1004 is not limited to a single part. For example, it can be connected into a tubular shape by two or more parts. It is understandable that when the housing 1000 is integrally formed, the back cover 1002 and the side shell portion 1004 are integral. The housing 1000 is not limited to having only one opening. In other embodiments, the housing 1000 can also be provided with two or more openings. For example, the side shell portion 1004 can be provided with a notch and sealed by a cover or other components.

[0085] The sound unit 10 is connected to the ear hook 111 through its housing assembly 100 . For example, the ear hook 111 can be connected to the side shell portion 1004 .

[0086] The sound-generating device is used to convert electrical signals into mechanical vibrations. For example, the sound-generating device can be a bone conduction sound-generating device, which converts electrical signals into mechanical vibrations and transmits the mechanical vibrations directly to the human skin through the face cover 1001, which is in contact with the facial skin, allowing the user to hear the sound through bone conduction. The sound-generating device can also be an air conduction sound-generating device, in which case the mechanical vibrations agitate the air to vibrate, thereby generating air-conducted sound. It will be understood that the housing assembly 100 is not limited to being installed with only one or one type of sound-generating device.

[0087] like Figure 4 and Figure 5 As shown, the sound unit 10 can simultaneously transmit sound by bone conduction and air conduction. At this time, a bone conduction sound device 2 and an air conduction sound device 3 are simultaneously provided therein. Optionally, the bone conduction sound device 2 is connected to the face cover 1001 and / or the back cover 1002.

[0088] It is understandable that when the sound-emitting unit 10 has independently set bone conduction sound-emitting devices 2 and air conduction sound-emitting devices 3, it is possible to selectively use the bone conduction sound-emitting devices 2 and air conduction sound-emitting devices 3 to emit sound, thereby increasing the diversity of the sound-emitting methods. In addition, the sound-emitting characteristics of the bone conduction sound-emitting devices 2 and air conduction sound-emitting devices 3 can be used to give full play to the performance advantages of the combination of bone conduction and air conduction, and avoid their disadvantages. For example, the frequency band with the largest vibration of the bone conduction vibration part is filtered out to reduce numbness, while the bass of the low-frequency part of the air conduction is used to improve the sensitivity of the low frequency. Of course, the above example is only one aspect. Those skilled in the art can make full use of the combined method to improve the sound quality in a variety of ways, improve the shortcomings of using a single sound-emitting unit independently, and thus improve the listening effect. The following is an example of a sound-emitting unit with two sound-emitting devices. It is understandable that the bone conduction sound-emitting device 2 and air conduction sound-emitting device 3 described below can also be applied separately to the sound-emitting unit 10.

[0089] Figures 6 to 8a This is a schematic diagram of the structure of a sound-emitting unit 10 according to some embodiments of the present disclosure. The sound-emitting unit 10 includes a housing assembly 100, and a bone conduction sound-emitting device 2 and an air conduction sound-emitting device 3, both of which are disposed within the housing assembly 100. The bone conduction sound-emitting device 2 is connected to a face cover 1001, and its vibrations are transmitted to the human body through the face cover 1001. The air conduction sound-emitting device 3 is disposed on one side of the bone conduction sound-emitting device 2. In other embodiments, the bone conduction sound-emitting device 2 may also be connected to a back cover 1002, or to both the face cover 1001 and the back cover 1002, transmitting vibrations to the face cover 1001 through the housing 1000, and then transmitting the vibrations to the human body through the face cover 1001. The housing assembly 100 is provided with a sound outlet 1003 connecting the interior and exterior. The air conduction sound-emitting device 3 emits sound outward through the sound outlet 1003. The air conduction sound-emitting device 3 has a diaphragm 321 for vibrating and producing sound. Optionally, the diaphragm 321 is disposed opposite the sound outlet 1003. Since the bone conduction sound generating device 2 and the air conduction sound generating device 3 are provided at the same time, bone conduction sound transmission and air conduction sound transmission can be realized at the same time to increase the volume, and the respective advantageous frequency bands can be utilized to achieve a better auditory effect.

[0090] In some embodiments, the air conduction sound device 3 is located on one side of the bone conduction sound device 2 in the width direction, and the air conduction sound device 3 and the bone conduction sound device 2 are arranged along the width direction Y of the sound unit 10. This makes the arrangement of the air conduction sound device 3 and the bone conduction sound device 2 more reasonable and compact, saves space, optimizes weight distribution, and helps to control the mass and volume of the sound unit 10 within a small range. The sound unit 10 can have a suitable shape and volume, not being too long and uncomfortable to wear, and facilitates the air conduction sound device 3 to be close to the ear for sound transmission. At the same time, when worn, the bone conduction sound device 2 is located away from the ear. When the angle β1 formed between the side surface 1123 and the contact surface 10010 toward the head is 160° to 170°, the portion of the housing assembly 100 corresponding to the bone conduction sound device 2 is deflected toward the face, which can better fit the face, thereby improving the sound transmission efficiency of the bone conduction sound device 2. The length direction X, width direction Y and thickness (or height) direction Z of the sound unit 10 can be referred to Figure 6 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 directions of the housing component 100 are consistent with the length, width and thickness directions of the sound unit 10.

[0091] The air conduction sound device 3 and the bone conduction sound device 2 are in the shape of an elongated strip, with a length greater than a width. For example, the outer contour of the cross section of the air conduction sound device 3 and the bone conduction sound device 2 is rectangular (the corners of which may be rounded, right-angled, chamfered, or other transitional connecting shapes between the long and short sides, such as curves, etc.) or runway-shaped. It is understood that the rectangular or runway-shaped outer contour of the cross section of the air conduction sound device 3 and the bone conduction sound device 2 does not mean that the outer contour must be strictly rectangular or runway-shaped geometrically, and may also be approximately rectangular or runway-shaped. Optionally, the bone conduction sound device 2 is arranged along the length direction of the sound unit 10 (for example, the length direction of the bone conduction sound device 2 may be consistent with the projection of the length direction of the sound unit 10 on the XY plane, or the two may form an angle of no more than 30°) to increase the volume of the bone conduction sound device 2, increase its sound pressure level, reduce distortion, and improve its sound effect. Optionally, the bone conduction sound emitting device 2 is aligned with the length of the sound unit 10 along its length. Optionally, the housing assembly 100 has a generally rectangular cavity, so that it is smaller in size while achieving the desired performance, and the internal space utilization rate is higher. Optionally, the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 are generally rectangular parallelepiped, and the outer contour of their cross-section is generally rectangular, so as to more fully utilize the space inside the housing assembly 100, making the entire sound unit 10 structure more compact, and minimizing the volume of the sound unit 10 while meeting the performance requirements. In this way, the overall appearance and volume of the earphone head are ergonomic, and it is convenient to install the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 in the earphone head.

[0092] Optionally, the length-to-width ratio of the bone conduction sound-generating device 2 is 1.3-3, which allows the sound-generating unit 10 to have sufficient vibration transmission area and space in the length direction. Furthermore, the length-to-width ratio of the bone conduction sound-generating device 2 is 1.6-2 to further balance the aspect ratio and ensure the sound quality and effect of the output sound.

[0093] Optionally, the ratio of the length to the width of the air-conducted sound-generating device 3 is 1.3 to 3. Further, the ratio of the length to the width of the air-conducted sound-generating device 3 is 1.6 to 2, so as to further balance the aspect ratio and ensure its good structure and acoustic output effect.

[0094] It is understood that when the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 are configured as a cuboid or a shape close to a cuboid, better space utilization can be achieved. In other embodiments, both or one of the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 can be configured as a cylinder. In other embodiments, the bone conduction sound emitting device 2 and / or the air conduction sound emitting device 3 can also be a polygonal prism.

[0095] Unless otherwise specified, this specification uses rectangular parallelepiped-shaped bone conduction sound generator 2 and air conduction sound generator 3 as examples. It should be understood that the use of rectangular parallelepiped shapes as examples does not necessarily mean that the bone conduction sound generator 2 and air conduction sound generator 3 must be rectangular parallelepiped-shaped. Their cross-sectional profiles can also be runway-shaped, cylindrical, elliptical, or polygonal.

[0096] In this application, the distinction standards of each frequency band are as follows: low frequency band is 20~250Hz, mid-low frequency is 250Hz~500Hz, mid frequency band is 500~2000Hz, mid-high frequency is 2000~5000Hz, and high frequency band is 5000~20000Hz.

[0097] The frequency response curves of the bone conduction sound generating device 2 and the air conduction sound generating device 3 both have a low-frequency resonance point (F0), which can be simply referred to as the low-frequency resonance frequency or low-frequency F0 or F0. At the low-frequency resonance point, a resonance peak appears in the frequency response curve.

[0098] Next, the vibration directions and sound outlets of the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 are described with examples.

[0099] like Figure 4 As shown, the positive direction of the vibration direction A of the bone conduction sound generating device 2 points to the contact surface 10010 between the face cover 1001 and the human body. The positive direction of the vibration direction is the direction pointing to the outside of the shell 1000, and the negative direction refers to the direction pointing to the inside of the shell 1000, which is opposite to the positive direction. Specifically, Figure 4, "+" and "-" indicate 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 leftward, and the negative direction is rightward. Optionally, the angle α1 between vibration direction A and contact surface 10010 is 60° to 90°. Further, optionally, the angle α1 between vibration direction A and contact surface 10010 is 75° to 90°. Even further, optionally, the angle α1 between vibration direction A and contact surface 10010 is 90°. As described above, when contact surface 10010 is a plane, the angle α1 between an object (e.g., vibration direction A) and contact surface 10010 is the angle between the object and the plane of contact surface 10010. When contact surface 10010 is a curved surface, the most convex or concave point of the curved surface has a tangent plane 10011. In this case, the angle α1 between the object and contact surface 10010 can be understood as the angle between vibration direction A and tangent plane 10011. Setting angle α1 to greater than 60° can reduce the component of vibration parallel to the face, allowing the vibration of bone conduction sound generator 2 to be better transmitted to the skull and reducing vibration loss.

[0100] The positive direction of the vibration direction B of the air conduction sound emitting device 3 points to the side shell portion 1004 of the housing 1000, and the vibration direction B is not parallel to or coincides with the vibration direction A of the bone conduction sound emitting device 2. In other words, the vibration direction B of the air conduction sound emitting device 3 and the vibration direction A of the bone conduction sound emitting device 2 have an angle that is not zero. In some embodiments, as Figure 8a and Figure 8c As shown, the air conduction sound emitting device 3 is arranged to face away from the bone conduction sound emitting device 2 (the side where the diaphragm 321 of the air conduction sound emitting device 3 is located is its front side, and its bottom surface 3b is its back side). At this time, its diaphragm 321 is close to the sound outlet 1003, which is beneficial to improve the sound transmission efficiency and increase the volume. In other embodiments, reference Figure 8b The air conduction sound emitting device 3 is arranged facing the bone conduction sound emitting device 2. For example, an opening can be set on the bottom surface 3b or other parts of the air conduction sound emitting device 3, such as a vent 3c connecting the inside and outside of the air conduction sound emitting device 3, to allow sound to be transmitted.

[0101] It can be understood that the air conduction sound device 3 is arranged facing or back to the bone conduction sound device 2, and its thickness direction corresponds to the width direction of the sound unit 10, thereby reducing the space occupied by the sound unit 10 in the width direction, which is beneficial to prevent the sound unit 10 from being uncomfortable to wear due to being too wide.

[0102] refer to Figure 4 and Figure 6When the head-mounted sound-emitting device is worn, the side shell portion 1004 of the shell 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 shell 1000, the outer shell assembly 100 and the sound-emitting unit 10. The air conduction sound emitting device 3 is arranged near the proximal end 10040 relative to the bone conduction sound emitting device 2, and is arranged to emit sound toward the proximal end 10040 of the side shell portion 1004. The sound outlet 1003 is opened on the proximal end 10040. In this way, the air conduction sound emitting device 3 can be close to the human ear and emit sound toward the human ear, which helps to improve the directness and clarity of the sound, reduce the loss and distortion of the sound, and enable people to hear louder air-conducted sound, with higher sound efficiency and better effect. Moreover, the volume of the air conduction sound emitting device 3 can be appropriately reduced, which is conducive to miniaturization. In addition, the bone conduction sound emitting device 2 is far away from the sound outlet 1003, which can reduce the interference caused by the internal sound waves emitted from the sound outlet when the bone conduction sound emitting device 2 vibrates. Figure 1 As shown, the proximal end 10040 is also the end of the side shell portion 1004 close to the functional compartment, and the sound outlet 1003 is opened on the end surface of the side shell portion 1004 of the outer shell component 100 facing the functional compartment.

[0103] In some embodiments, reference Figure 9 , the angle α2 between the vibration direction B of the air conduction sound device 3 and the contact surface 10010 is 0 to 45°. Setting the angle α2 between the vibration direction B and the contact surface 10010 to 0 to 45° can make the sound emitted by the air conduction sound device 3 better directed to the ear canal, improve the sound propagation efficiency, and reduce sound leakage. Further optionally, the angle α2 is 0 to 30°, and further, the angle α2 is 0 to 15°, so that the sound emitted by the air conduction sound 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 conduction sound device 3 points to the side where the contact surface 10010 is located or to the plane where the contact surface 10010 is located, and extends in a direction away from the bone conduction sound device 2. Optionally, when the head-mounted sound device is worn, the positive direction of the vibration direction B points to the inside of the auricle, thereby utilizing the sound-gathering effect of the auricle to improve the listening effect and help reduce sound leakage.

[0104] It is understandable that the angles of the bone conduction sound generating device 2 and the air conduction sound generating device 3 can be adjusted in a variety of ways. Figure 9In the illustrated embodiment, both are connected to the face cover 1001 and the side shell 1004, respectively, via a connector 12. The surface of the connector 12 that connects to the sound-generating device is inclined, so that the bone conduction sound-generating device 2 and the air conduction sound-generating device 3 are correspondingly inclined after installation. In other embodiments, the connector 12 may not be provided, and inclined surfaces may be provided on the face cover 1001 and the side shell 1004, with the bone conduction sound-generating device 2 and the air conduction sound-generating device 3 respectively installed on the corresponding inclined surfaces to adjust the angle.

[0105] In some embodiments, the angle α3 between the axial direction C of the sound outlet 1003 and the contact surface 10010 is 0 to 45°, so that the sound range emitted by it can be reliably transmitted to the ear. Further optionally, the angle α3 is 0 to 30°, and further, the angle α3 is 0 to 15°, which can further increase the sound transmitted 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 to the side where the contact surface 10010 is located, so that the sound is guided by the sound outlet 1003 and propagates toward the ear canal, reducing sound leakage caused by outward divergence. Similarly, the positive direction of the axial direction C of the sound outlet 1003 refers to the direction toward the outside of the shell, and the negative direction is opposite to the positive direction. Optionally, when the head-mounted sound device is worn, the positive direction of the axial direction C points to the inside of the auricle, thereby utilizing the sound-gathering effect of the auricle to improve the listening effect and help reduce sound leakage.

[0106] It can be understood that the angle between the vibration direction or the axial direction (or other) and the contact surface 10010 (or other surface) is 0~N°, which means that the angle can be 0 degrees, that is, parallel to the contact surface 10010, or it can be greater than 0°, that is, inclined to the contact surface 10010, but the inclination angle is not greater than N°. For example, the angle α3 between the axial direction C of the sound hole 1003 and the contact surface 10010 is 0~45°, indicating that the axial direction C can be parallel to the contact surface 10010, or inclined relative to the contact surface 10010 and the angle does not exceed 45°.

[0107] In some embodiments, the axial direction C of the sound outlet 1003 is aligned with the vibration direction B of the air conduction sound device 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, further improving the efficiency of sound transmission. In some embodiments, the axial direction C of the sound outlet 1003 is parallel to the contact surface 10010, while the vibration direction B of the air conduction sound device 3 is not parallel to the contact surface 10010. In some embodiments, the angle α3 is greater than the angle α2. The smaller the angle α2, the more perpendicular it is to the depth direction of the housing 1000 and the cover 1001, which better utilizes the space within the housing assembly 100 and prevents the space from being increased due to the tilted arrangement of the air conduction sound device 3 and the bone conduction sound device 2. In addition, a smaller angle α2 can bring the center of the diaphragm closer to the sound outlet 1003. A shorter sound wave propagation path can increase the sound pressure level received by the human ear, allowing the air conduction sound device 3 to output a higher volume at the same power. Therefore, angle α3 is greater than angle α2, which facilitates miniaturization of the sound unit, or, while maintaining the same volume, increases the volume of the bone conduction sound generating device 2 and / or the air conduction sound generating device 3, thereby improving the sound effect. Optionally, vibration direction A is perpendicular to contact surface 10010, and vibration direction B is parallel to contact surface 10010. The air conduction sound generating device 3 adjusts the direction of the sound emitted from the sound output hole 1003 through the sound output hole 1003.

[0108] It is understandable that the axial direction C of the sound outlet 1003 can be adjusted in a variety of ways, for example, Figure 9 In the illustrated embodiment, the sound hole 1003 is tiltedly arranged on the side shell portion 1004, and the axial direction C of the sound hole 1003 is changed by the inclination of the side shell portion 1004 relative to the side shell portion 1004. For example, the side shell portion 1004 can be arranged to be tilted relative to the contact surface 10010, and the sound hole 1003 is vertically arranged on the side shell portion 1004, and the axial direction C of the sound hole 1003 is changed by the inclination of the side shell portion 1004 relative to the contact surface 10010.

[0109] The number of the sound outlet holes 1003 may be one or more, for example, one, two, three or more.

[0110] In some embodiments, reference Figure 9The vibration direction A of the bone conduction sound-generating device 2 is tilted relative to the contact surface 10010, and its positive direction points away from the air conduction sound-generating device 3. The positive direction of the vibration direction B of the air conduction sound-generating device 3 points away from the bone conduction sound-generating device 2. The vibration direction B can be tilted or parallel to the contact surface 10010. When the bone conduction sound-generating device 2 and the air conduction sound-generating device 3 are in operation, the vibrating components therein (i.e., the vibrator of the bone conduction sound-generating device 2 and the diaphragm assembly 32 of the air conduction sound-generating device 3) generate a certain vibration force. Because this vibration force is not completely perpendicular to the contact surface 10010, it generates a component force parallel to the contact surface 10010, which not only affects comfort but may also cause the earphone headphone to shift in a direction parallel to the contact surface 10010. Directing the positive vibration direction A of the bone conduction sound device 2 away from the air conduction sound device 3 and the positive vibration direction A of the air conduction sound device 3 away from the bone conduction sound device 2 can at least partially offset the force components parallel to the contact surface 10010 generated when the bone conduction sound device 2 and the air conduction sound device 3 vibrate simultaneously, thereby reducing or even eliminating vibrations parallel to the contact surface 10010 and improving wearing comfort and stability. The mass of the oscillator of the bone conduction sound device 2 is M1, and the mass of the diaphragm assembly 32 of the air conduction sound device 3 is M2. Optionally, the ratio of M1*cosα1 to M2*cosα2 is 0.8 to 1.2, further optionally 0.9 to 1.1, and even further optionally 1, to further ensure wearing comfort and stability. Here, "*" refers to the multiplication sign.

[0111] In some embodiments, as Figure 8a As shown, the thickness D1 of the bone conduction sound-generating device 2 is 5 mm to 6.5 mm (in the embodiment described in this specification, the thickness direction of the bone conduction sound-generating device 2 is consistent with its vibration direction A, and the thickness direction of the air conduction sound-generating device 3 is consistent with its vibration direction B). Within the available space of the earphone headphone, the thicker the bone conduction sound-generating device 2, the larger the volume of the bone conduction magnetic circuit assembly 21 can be made, the greater the magnetic flux B value of the effective magnetic circuit, and ultimately the driving force of the magnetic field provided is also greater, thereby providing a greater vibration amount, that is, improving the sensitivity of the bone conduction sound-generating device 2. Setting the thickness of the bone conduction sound-generating device 2 to 5 mm to 6.5 mm is conducive to achieving a good loudness effect without causing the earphone headphone head to be too thick. Furthermore, the thickness D1 of the bone conduction sound-generating device 2 is 5.5 mm to 6 mm to make it more appropriately sized.

[0112] The thickness D2 of the air conduction sound generating device 3 can be selected from 1.5 mm to 3 mm. The thickness D2 of the air conduction sound generating device 3 refers to the thickness D2 from the bottom surface 3b to the middle piece 3211 of the diaphragm 321 (see reference numerals). Figure 32 and Figure 39) between the outer surfaces, when the air conduction sound emitting device 3 includes a reinforcing sheet 3213, reference Figure 26 and Figure 31 The thickness D2 of the air-conduction sound-generating device 3 refers to the distance between its bottom surface 3b and the outer surface of its reinforcement plate 3213. An overly thin air-conduction sound-generating device 3 may limit the vibration range of the diaphragm. Furthermore, this thickness limitation prevents the ideal thickness of the magnetic circuit assembly. On the one hand, overly thin magnets in the magnetic circuit assembly are difficult to manufacture, leading to potential breakage during manufacturing, resulting in a reduced yield and increased costs. On the other hand, overly thin magnets can reduce the magnetic flux B value, ultimately reducing the driving force of the air-conduction sound-generating device 3 and sensitivity. This results in a decrease in the user's subjective and objective listening volume, ultimately affecting sound performance and quality. Overly thick components may increase resonance or cause other sound distortion. Furthermore, overly thick products lead to larger product sizes, making the earphone head heavier and more massive, reducing user comfort. This increased mass further increases the vibration mass of the bone conduction sound unit system, reducing sensitivity in the mid- and high-frequency bands and losing detail in sound transmission, ultimately resulting in reduced sound quality. Within the aforementioned thickness range, the air conduction sound device 3 provides good sound quality and occupies a relatively short length, facilitating the placement of the bone conduction sound device 2. This reduces the overall width of the earphone head and keeps the headphone head's mass within a reasonable range, ensuring sufficient driving force while maintaining a good listening experience for the user. Furthermore, the thickness D2 of the air conduction sound device 3 is between 2 mm and 2.8 mm, making it a more suitable size.

[0113] The thickness D1 of the bone conduction sound emitting device 2 is greater than the thickness D2 of the air conduction sound emitting device 3. Optionally, the ratio of the thickness D1 of the bone conduction sound emitting device 2 to the thickness D2 of the air conduction sound emitting device 3 is 1.7-3. On the one hand, the thickness D1 of the bone conduction sound-generating device 2 is greater than the thickness D2 of the air conduction sound-generating device 3. This can appropriately increase the volume of the bone conduction sound-generating device 2, that is, reserve as much available space in the earphone head as possible for the bone conduction sound-generating device 2, thereby ensuring that it has suitable space to set up the bone conduction magnetic circuit component, ensure the thickness and volume of the magnet, further improve the B value of the bone conduction magnetic circuit component, and improve the driving force of the bone conduction sound-generating device 2, that is, it can increase its vibration amount, thereby increasing its sound pressure level, and thus improving the sound effect of the sound unit 10; on the other hand, making the air conduction sound-generating device 3 thinner can reduce the space occupied by the air conduction sound-generating device 3 in the internal space of the housing assembly 100. When it is set close to the side shell portion 1004, more space can be left for the installation of the bone conduction sound-generating device 2, which is conducive to reducing the volume of the sound unit 10 or increasing the volume of the bone conduction sound-generating device 2.

[0114] Next, the connection structure between the air conduction sound generating device 3 and the housing assembly 100 and the relevant features of the front cavity are described with examples.

[0115] In some embodiments, the sound unit 10 further includes a front cavity 10042 and a rear cavity 10044. The front cavity 10042 and rear cavity 10044 are separated by the diaphragm 321 of the air conduction sound device 3. Specifically, the side of the diaphragm 321 facing the exterior of the housing assembly 100 is the front cavity, and the side of the diaphragm 321 facing the interior of the housing assembly 100 (the side where the bone conduction sound device 2 is located) is the rear cavity. The front cavity 10042 is connected to the sound outlet 1003 to emit sound outward. The provision of the front cavity 10042 facilitates the concentrated emission of sound generated by the vibration of the diaphragm 321 through the front cavity 10042 and the sound outlet 1003, thereby improving sound transmission efficiency and reducing volume loss. This allows for the use of a smaller air conduction sound device 3, facilitating miniaturization of the sound unit 10. This also facilitates improved high-frequency sensitivity. It will be appreciated that the interior and exterior of the air conduction sound device 3 are connected to allow for smooth airflow and balance the air pressure inside and outside the air conduction sound device 3. Optionally, the air conduction sound generating device 3 is provided with at least one vent hole 3c communicating with the inside and outside thereof. The vent hole 3c can be provided on the magnetic conductive bottom plate 3100 and / or the magnetic conductive side plate 3101 of the magnetic conductive support member 310, for example. Figure 8a FIG3 shows a case where a vent hole 3c is provided on the magnetic bottom plate 3100. In some cases, sound can be emitted outward through the vent hole 3c, for example, referring to FIG3. Figure 8b When the bottom surface 3b of the air conduction sound emitting device 3 is arranged toward the sound outlet 1003, sound can be emitted outward through the vent hole 3c.

[0116] Optionally, the outer contour of the cross section of the air-conducting sound-generating device 3 perpendicular to the vibration direction B is roughly rectangular, and the outer contour of the cross section of the front cavity 10042 perpendicular to the vibration direction B is also roughly rectangular, so as to make full use of the internal space of the shell 1000, so that the cross-sectional dimension of the air-conducting sound-generating device 3 perpendicular to the vibration direction B can be made larger, thereby enabling the air-conducting sound-generating device 3 to increase its volume without excessively increasing its thickness, thereby ensuring the sound effect, and also enabling the diaphragm 321 to have a larger area, which is conducive to increasing the volume and enhancing the low-frequency effect.

[0117] Figure 10 The frequency response curves of the sound unit 10 corresponding to the front cavities of different volumes obtained by simulation are shown. During the simulation, the air conduction sound device 3 makes a sound, and the bone conduction sound device 2 does not make a sound. Except for the change in the volume of the front cavity 10042, other parameters remain unchanged. It can be seen from the figure that as the volume of the front cavity decreases, the high-frequency cutoff frequency becomes larger, the curve between the high-frequency resonance peak and the low-frequency resonance peak becomes flatter, and the sound pressure level attenuation after the high-frequency resonance 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. Optionally, the volume of the front cavity 10042 is 10 to 250 mm 3A smaller front cavity 10042 helps extend the resonance frequency of the front cavity toward higher frequencies, preventing the high-frequency cutoff frequency from being too far forward, which would result in low high-frequency sensitivity and thus improve the sound effect. However, a front cavity 10042 that is too small will affect the normal operation of the diaphragm 321, for example, it may cause the diaphragm 321 to contact the shell and generate noise. In order to ensure that the front cavity 10042 provides sufficient vibration space for the diaphragm 321 and ensures that the high-frequency cutoff frequency is far back, the volume of the front cavity 10042 can be further selected to be 50 to 200 mm 3 , further optional 70 ~ 180mm 3 , so that the volume of the front cavity 10042 is more appropriate, does not occupy too much space, and is also conducive to ensuring the structural strength of the shell.

[0118] In some embodiments, the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 are located in the same cavity of the outer shell component 100. On the one hand, the outer shell component 100 can have a larger rear cavity 10044, thereby reducing the F0 of the air conduction sound emitting device 3 and improving the low-frequency effect. On the other hand, the internal space of the outer shell component 100 can be effectively utilized, and the spatial arrangement of the two sound emitting devices in the earphone head can be reasonably arranged. Compared with separating the two bone conduction sound emitting devices 2 and the air conduction sound emitting device 3 by a partition, it is beneficial to make the entire earphone head smaller and more compact. At the same time, because the volume of the earphone head is reduced, the volume of the shell is also reduced accordingly, which can reduce the weight of the entire earphone head and reduce the sense of weight when worn. The weight reduction is also beneficial to improving the frequency response of the high-frequency band of the bone conduction sound transmission part and improving the sound quality of the high-frequency band. In some embodiments, reference Figure 8a The housing 1000 is provided with a through hole 10000 communicating with the inside and outside thereof. For example, one or more (in this specification, a plurality includes two or more) through holes 10000 may be provided on the back cover 1002 and / or the side shell portion 1004. The through hole 10000 is communicated with the rear cavity 10044, which is beneficial to enlarge the rear cavity 10044 of the air conduction sound generating device 3, thereby reducing F0 and improving low-frequency sensitivity. Figure 8d As shown, Figure 8d The frequency response curves of the sound unit 10 with different total area sizes of the through holes 10000 obtained by simulation are shown. During the simulation, the air conduction sound device 3 makes a sound, and the bone conduction sound device 2 does not make a sound. Except for the change in the area of the through hole 10000, other parameters remain unchanged. It can be seen from the figure that when the total area of the through hole 10000 is less than or equal to 0.3mm 2 When the frequency response curve is not good, the low frequency F0 is large, exceeding 1000Hz. Optionally, the total area of all through holes 10000 ranges from 1 to 80mm 2 To improve the sound effect. The total area of all through holes 10000 can be further selected to be 5 to 40 mm 2, so that the frequency response curve has a smaller low-frequency F0, and the curve is more stable, and the sound effect is better. 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 component 100.

[0119] The number of through holes 10000 can be one, for example, the area of a single through hole 10000 is 1 to 80 mm. 2 , further optional 5~40mm 2 In some embodiments, the number of through holes 10000 is multiple, and the area of a single through hole 10000 is 0.03 to 3 mm. 2 , further optional 0.05 ~ 1mm 2 , so as to enlarge the rear cavity 10044 while preventing large sound leakage due to an oversized through hole 10000, and at the same time 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 effects. In other embodiments, the bone conduction sound generating device 2 and the air conduction sound generating device 3 can be respectively arranged in two independent cavities, for example, separated by a partition to reduce mutual interference in operation. Optionally, the cavity where the air conduction sound generating device 3 is located is provided with a through hole 10000 that communicates with the outside world. 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.

[0120] The air conduction sound generating device 3 is fixedly connected to the housing assembly 100. In some embodiments, the air conduction sound generating device 3 is connected to the inner wall of the side shell portion 1004, for example, through its diaphragm 321, air conduction bracket 30, magnetic conductive side plate 3101 and / or magnetic conductive bottom plate 3100 (see reference numerals). Figure 26 and Figure 31 ) and the like are connected to the inner wall. In other embodiments, in order to further reduce the occupation of the internal space of the housing assembly 100 by the air conduction sound emitting device 3, the air conduction sound emitting device 3 can be embedded in the side shell portion 1004 to reduce the occupation of the internal space of the housing assembly 100 by the air conduction sound emitting device 3, thereby facilitating the miniaturization of the sound unit 10. In addition, the firmness of the connection between the air conduction sound emitting device 3 and the side shell portion 1004 can also be improved. The air conduction sound emitting device 3 is at least partially embedded in the side shell portion 1004, for example, referring to Figure 6 and Figure 7The inner wall of the side shell portion 1004 is provided with a mounting groove 10041, and the air conduction sound-generating device 3 is disposed within the mounting groove 10041. In the illustrated embodiment, the air conduction sound-generating device 3 is partially located within the mounting groove 10041. In other embodiments, the air conduction sound-generating device 3 may also be completely located within the mounting groove 10041. The mounting groove 10041 not only saves space occupied by the air conduction sound-generating device 3, but also serves to position the air conduction sound-generating device 3. Compared to a solution in which the air conduction sound-generating device 3 is attached to the inner wall of the side shell portion 1004, there is no need for an additional limiting structure. Furthermore, the mounting groove 10041 increases the contact area between the air conduction sound-generating device 3 and the housing assembly 100, and also increases the secureness of the installation of the air conduction 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 a sufficient embedding depth, thereby increasing the reliability of positioning and connection. At the same time, the wall thickness of the side shell portion 1004 for mounting the air-conducting sound-generating device 3 is not too thick, which is beneficial to reducing the mass of the sound-generating unit 10.

[0121] refer to Figure 7 and Figure 8a The side shell portion 1004 of the housing 1000 is provided with the aforementioned front cavity 10042, which communicates with the mounting groove 10041 and the sound outlet 1003. The front cavity 10042 is provided corresponding to the sound outlet surface (i.e., the diaphragm 321) of the air conduction 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 required. For example, the mounting groove 10041 may be omitted, and the front cavity 10042 may be directly formed on the inner wall of the side shell portion 1004 and communicate with the sound outlet 1003. The air conduction sound-generating device 3 is also directly connected to the inner wall of the side shell portion 1004.

[0122] Next, the bone conduction sound emitting device 2 of the sound emitting unit 10 is described with an example.

[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 a bracket, magnetic circuit assembly, and coil. 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 bracket, magnetic circuit assembly, and coil of the bone conduction sound generating device 2 are respectively referred to as the bone conduction bracket, bone conduction magnetic circuit assembly, and bone conduction coil; while the bracket, magnetic circuit assembly, and coil of the air conduction sound generating device 3 are respectively referred to as the air conduction bracket, air conduction magnetic circuit assembly, and air conduction coil.

[0124] Figure 11a is a schematic structural diagram of a bone conduction sound generating device 2 according to some embodiments of this specification. Figure 11b yes Figure 11a The cross-sectional view of the bone conduction sound generating device 2 is shown in FIG. Figure 12Figure 2 is a schematic cross-sectional view 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. Both the bone conduction magnetic circuit assembly 21 and the bone conduction coil 22 are disposed within the bone conduction support 20. The spring 23 is connected between the bone conduction support 20 and the bone conduction magnetic circuit assembly 21. Optionally, the spring 23 is connected to the end surface 202 of the bone conduction support 20. The bone conduction coil 22 surrounds the exterior of the bone conduction magnetic circuit assembly 21 and is fixed relative to the bone conduction support 20, driving the bone conduction magnetic circuit assembly 21 to vibrate. The bone conduction magnetic circuit assembly 21 is connected to the bone conduction support 20 via 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 the face cover 1001 to transmit vibrations to the face cover 1001. For example, the connection to the face cover 1001 may be via 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 does not move relative to the housing assembly 100 when the bone conduction sound generating device 2 is in operation, including components such as the bone conduction bracket 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 bracket 20 when the bone conduction sound generating device 2 is in operation, including components such as the bone conduction magnetic circuit assembly 21 and the spring 23.

[0125] In some embodiments, the bone conduction support 20 is annular, with both ends open, and surrounds the outside of the bone conduction magnetic circuit assembly 21 and the bone conduction coil 22. Optionally, the shape of the bone conduction support 20 is a rectangular ring (the four corners can be rounded, right angles, beveled, or other curved shapes that reduce the volume of the four corners), which is more convenient for installation in the housing assembly 100 with the air conduction sound device 3, and more fully utilizes 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 a circular ring, a racetrack shape, etc. Figure 13 That is, it shows a schematic diagram of the bone conduction sound generating device 2 when the bone conduction support 20 is in a racetrack shape.

[0126] The bone conduction support 20 can be made of either a magnetically conductive material or a non-magnetic material. The non-magnetic material can be a non-metallic, low-density material such as plastic PC, ABS, PC+ABS, or PC+fiberglass. A bone conduction support 20 made of a non-magnetic material can reduce the mass of the bone conduction sound generator 2 and the stator mass of the bone conduction sound generator 2, thereby improving the mid- and high-frequency sensitivity of the bone conduction sound generator 2. When the bone conduction support 20 is made of a magnetically conductive material (such as magnetically conductive stainless steel), the BL value (the BL value reflects electromagnetic characteristics and is the product of magnetic field strength and coil conductor length) can be increased, magnetic leakage can be reduced, and mid-frequency sensitivity can be improved. In this specification, unless otherwise specified, the bone conduction support 20 is made of a magnetically conductive material.

[0127] In some embodiments, the bone magnetic circuit assembly 21 includes at least one magnet 210 and at least two magnetic conductive plates 211, with a magnet 210 connected between two adjacent magnetic conductive plates 211. The north and south poles of the magnets 210, as well as the magnets 210 and the magnetic conductive plates 211, are arranged along the vibration direction A of the bone magnetic circuit assembly 21. When there are two or more magnets 210, the polarity of the opposing magnetic poles of two adjacent magnets 210 is the same (i.e., the same poles are facing each other). An annular bone magnetic gap 24 is formed between the bone magnetic circuit assembly 21 and the bone conduction support 20. A bone conduction coil 22 surrounds the magnetic conductive plates 211 and is located within the bone magnetic gap 24 between the bone conduction support 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 vibrate back and forth, and the vibration is transmitted to the bone conduction support 20 and the cover 1001 via the spring 23. At least one or all of the magnetic conductive plates 211 are surrounded by a bone conduction coil 22. When all magnetic conductive plates 211 are surrounded by bone conduction coils 22, the number of bone conduction coils 22 corresponds to the number of magnetic conductive plates 211. Optionally, at least two magnetic conductive plates 211 are surrounded by a bone conduction coil 22 to increase the driving force of the bone conduction coils 22 and improve the volume. In other embodiments, only one magnetic conductive plate 211 may be surrounded by a bone conduction coil 22.

[0128] Figure 11b 、 Figure 14a 、 Figure 15a 、 Figure 16a 、 Figure 17a as well as Figure 23a 、 Figure 23b A schematic structural diagram of a bone magnetic circuit assembly 21 according to some embodiments of this specification is shown.

[0129] Figure 11b 、 Figure 14a and Figure 23a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes a magnet 210 and two magnetic conductive plates 211 arranged along the vibration direction A. The two magnetic conductive plates 211 are connected to both sides of the magnet 210. A bone conductive coil 22 surrounds each of the two magnetic conductive plates 211. Figure 11b 、 Figure 14a and Figure 23a 、 Figure 23b The difference between the structures shown is that Figure 11b The magnetic conductive plate 211 shown is provided with a boss 2113 and a recess 2114. Figure 14a The magnetic conductive plate 211 shown is provided with a boss 2113 but not a recess 2114. Figure 23a and Figure 23b The magnetic conductive plate 211 is connected to a gasket 26. Figure 23a and Figure 23b The difference lies in the structure of the bone magnetic circuit component 21.

[0130] Figure 15a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes three magnets 210 and two magnetic conductive plates 211 arranged along the vibration direction A. A magnetic conductive plate 211 is connected between two adjacent magnets 210. The two adjacent magnets 210 are arranged with the same poles facing each other. A bone conductive coil 22 surrounds the magnetic conductive plate 211 located between the two adjacent magnets 210. Compared to a single-magnet structure, the three-magnet structure can increase sensitivity.

[0131] Figure 16a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes three magnets 210 and four magnetic conductive plates 211 arranged along the vibration direction A. A magnet 210 is connected between two adjacent magnetic conductive plates 211. Two adjacent magnets 210 are arranged with the same poles facing each other. A bone conductive coil 22 surrounds the outer surface of the magnetic conductive plates 211 located between two adjacent magnets 210. Because the outermost magnetic conductive plates 211 are located on the outermost side of the bone magnetic circuit assembly 21, magnetic flux leakage is reduced.

[0132] Figure 17a In the illustrated embodiment, the bone magnetic circuit assembly 21 includes two magnets 210 and three magnetic conductive plates 211 arranged along the vibration direction A. A magnet 210 is connected between two adjacent magnetic conductive plates 211. Two adjacent magnets 210 are arranged with the same poles facing each other. A bone conductive coil 22 surrounds the outer surface of the magnetic conductive plates 211 located between two adjacent magnets 210. Because the outermost magnetic conductive plates 211 are located on the outermost side of the bone magnetic circuit assembly 21, magnetic flux leakage is reduced.

[0133] It can be understood that in other embodiments, the bone magnetic circuit assembly 21 can also include two magnets 210 and a magnetic conductive plate 211 arranged along the vibration direction A, the two magnets 210 are respectively connected to the two sides of the magnetic conductive plate 211, and a bone conductive coil 22 is surrounded by the outside of the magnetic conductive plate 211.

[0134] The bone conduction magnetic circuit components 21 mentioned above can be installed in the bone conduction sound device 2 and assembled into the sound unit 10, for example, Figure 12 and Figure 8c That is, respectively showing the Figure 15a The bone conduction magnetic circuit assembly 21 shown is applied to the bone conduction sound emitting device 2 and the sound emitting unit 10 .

[0135] Next, the spring piece 23 of the bone conduction sound generating device 2 is described with an example.

[0136] The number of the springs 23 can be one, two or more. Figure 11a and Figure 11bAs shown, the bone conduction sound generating device 2 includes two springs 23, which are spaced apart along the vibration direction A. Optionally, the two springs 23 are respectively arranged at both ends of the bone conduction magnetic circuit component 21 along the vibration direction A, which can improve the stability of the vibration and help prevent the bone conduction magnetic circuit component 21 from swinging (or rolling vibration) during the vibration process, thereby reducing the risk of it colliding with side components. The spring 23 is generally sheet-shaped, and its thickness B2 is 0.1mm to 0.25mm, and can further be 0.13mm to 0.2mm. Figure 18 The spring clip 23 includes an outer frame 230, an inner frame 231 positioned within the outer frame 230, and at least two elastic arms 232 connected between the outer frame 230 and the inner frame 231. The outer frame 230 is connected to the bone conduction support 20. Optionally, the spring clip 23 is in contact with the end surface 202 of the bone conduction support 20. The outer frame 230 and the bone conduction support 20 can be connected by gluing or welding. Exemplarily, the outer frame 230 and the end surface 202 are connected by welding. Welding provides a stronger bond than adhesive bonding, resulting in a more stable elastic modulus of the spring clip 23, which is beneficial for the stability of the low-frequency F0 of the bone conduction sound generating device 2. For example, spot welding or wire welding can be used, with wire welding being preferred. Wire welding reduces welding slag, thereby preventing it from entering the product and causing noise. It also offers stronger welding strength than spot welding or adhesive bonding, which enhances reliability.

[0137] In some embodiments, reference Figure 18 , the outer frame 230 is continuous and annular. In other embodiments, the outer frame 230 is discontinuous, referring to Figure 19 , which may be in the form of a discontinuous ring (or discontinuous ring), or, referring to Figure 20 , which may simply include a plurality of sheet portions 2303 connected to the elastic arms 232. By selecting an outer frame 230 in a continuous ring, a discontinuous ring, or other forms, the mass of the elastic sheet 23, and thus the mass of the bone conduction sound generating device 2, can be adjusted. Unless otherwise specified, this specification uses the outer frame 230 in a continuous ring shape as an example.

[0138] The spring piece 23 may include a plurality of elastic arms 232, and the plurality of elastic arms 232 are rotationally symmetrically arranged with the center of the inner frame 231 as the center. The number of the elastic arms 232 may be, for example, 2, 3, 4 or more. Optionally, the spring piece 23 includes 2 to 4 elastic arms 232. Figure 18 The spring clip 23 shown includes two elastic arms 232 arranged symmetrically with respect to the center. The elastic arms 232 of the spring clip 23 have an inner connecting portion 2320 connected to the inner frame 231 and an outer connecting portion 2321 connected to the outer frame 230. Hereinafter, unless otherwise specified, the spring clip 23 having two elastic arms 232 will be described as an example.

[0139] In some embodiments, the outer frame 230 and the inner frame 231 of the spring 23 are flush, which is more convenient for manufacturing. Figure 21 , Figure 21 FIG1 is a schematic cross-sectional view of a shrapnel according to an embodiment of the present invention. Figure 21 The cross-section of the outer frame 230 and inner frame 231 of the spring clip 23 passes through the center and is perpendicular to the width of the spring clip 23. The outer frame 230 and inner frame 231 of the spring clip 23 are spaced apart along the thickness direction of the spring clip 23 (aligned with the vibration direction A). When the spring clip 23 is installed on the bone conduction stent 20, the inner frame 231 is recessed into the bone conduction stent 20 relative to the outer frame 230, and is closer to the bone magnetic circuit assembly 21 in the vibration direction A. This allows the bone conduction stent 20 to extend further beyond the bone magnetic circuit assembly 21 in the vibration direction A, thereby providing better magnetic conduction and reducing magnetic flux leakage. Furthermore, when the bone magnetic circuit assembly 21 vibrates, less of it extends beyond the bone conduction stent 20, reducing the risk of the vibrator striking external components. Optionally, the distance D11 between the outer frame 230 and inner frame 231 along the vibration direction A is 0.35 to 0.8 mm, and further preferably 0.4 to 0.65 mm.

[0140] Optional, further reference Figure 21 and Figure 22 The distance D11 between the outer frame 230 and the inner frame 231 is greater than the maximum amplitude of the bone conduction magnetic circuit assembly 21 when the bone conduction sound device 2 is in operation. This means that when the bone conduction sound device 2 is in operation, the inner frame 231 does not extend beyond the upper end surface of the outer frame 230, preventing the spring 23 from striking the outer area of the bone conduction sound device 2 and generating noise. This facilitates installation of the bone conduction sound device 2 and eliminates the need for clearance at either end in the vibration direction. The maximum amplitude refers to the maximum single-sided vibration amplitude of the spring 23 within the frequency range of 20 Hz to 20 kHz when a 0.5 Vrms voltage is input to the bone conduction sound device 2. In some embodiments, the maximum amplitude of the bone conduction magnetic circuit assembly 21 during operation is 0.2 to 0.7 mm. In this case, the distance D11 between the outer frame 230 and the inner frame 231 can be 0.35 to 0.8 mm. If the maximum amplitude is too small, the sensitivity is insufficient, and if the amplitude is too large, noise is likely to be generated. Setting the maximum amplitude to 0.2-0.7 mm is beneficial for ensuring sensitivity and reducing noise. Furthermore, optionally, the maximum amplitude of the bone magnetic circuit assembly 21 during operation is 0.3-0.5 mm. In this case, the spacing distance D11 between the outer frame 230 and the inner frame 231 can be 0.4-0.65 mm. Optionally, the ratio of the spacing distance D11 to the maximum amplitude of the bone magnetic circuit assembly 21 is 1.05-1.5 to better ensure that the bone magnetic circuit assembly 21 does not extend beyond the upper end surface of the outer frame 230.

[0141] In some embodiments, the two springs 23 at both ends of the bone conduction sound-generating device 2 have the same structure, which is conducive to maintaining a balanced state of the bone magnetic circuit assembly 21. Furthermore, the two springs 23 are arranged symmetrically in the center, which can make the bone magnetic circuit assembly 21 better balanced during vibration, which is conducive to improving the sound quality. It is understandable that the bone magnetic circuit assembly 21 can be formed by connecting multiple parts (split type), and when the structure can be realized, it can also be formed by integral magnetization. When it is formed by connecting multiple parts, its magnet 210 and magnetic plate 211 are independent parts, and each independent part is connected by gluing or other means to form the bone magnetic circuit assembly 21. When the bone magnetic circuit assembly 21 is made by integral magnetization, the bone magnetic circuit assembly 21 is a separate part (integrated), and the magnet 210 and magnetic plate 211 are part of the part. There is no need to connect them through a connection process to form the bone magnetic circuit assembly 21. Therefore, the bone magnetic circuit assembly 21 formed by integral magnetization usually has higher dimensional accuracy. It should be noted that the bone magnetic circuit assembly 21 is an integrated part, which means that at least the magnet 210 and the magnetic plate 211 are an integrated single part. The spacer used to connect the bone magnetic circuit assembly 21 to the spring 23 can be an independent part or an integrated part. For example, Figure 14b 、 Figure 15b 、 Figure 16b and Figure 17b Shown respectively with Figure 14a 、 Figure 15a 、 Figure 16a and Figure 17a The schematic diagram of the integrated bone magnetic circuit assembly corresponding to the split bone magnetic circuit assembly shown in the figure, in which the solid line indicates the boundary between the two independent parts, and the dotted line indicates the boundary between the different parts (magnetic plate 211 and magnet 210) in the integrated part. Figure 15b and Figure 17b The spacer (gasket 26) in the is an independent part, Figure 14b and Figure 16b The spacer (boss 2113) in the bone magnetic circuit assembly is integrated. The integrated magnetization method can be referred to the patent document with application number 202111062238.3, the entire content of which is incorporated herein by reference.

[0142] Next, the air conduction sound generating device 3 of the sound generating unit 10 is described with an example.

[0143] In some embodiments, as Figures 24 to 26 、 Figures 30 to 33As shown, the air conduction sound-generating device 3 includes an annular air conduction support 30, an air conduction magnetic circuit assembly 31, and a diaphragm assembly 32, both connected to the air conduction support 30. The air conduction support 30 can be made of a lightweight material (e.g., plastic) to reduce the mass and density of the air conduction sound-generating device 3. Optionally, the air conduction support 30 is non-magnetic. The diaphragm assembly 32 includes an air conduction coil 320 located within the magnetic field of the air conduction magnetic circuit assembly 31, and a diaphragm 321 connected between the air conduction coil 320 and the air conduction support 30. When an alternating current is passed through the air conduction coil 320, it will generate an interaction force with the magnetic field of the air conduction magnetic circuit assembly 31, thereby driving the diaphragm 321 to vibrate.

[0144] Next, the air-conduction magnetic circuit component 31 of the air-conduction sound-generating device 3 is first described with an example.

[0145] The air-conducting magnetic circuit assembly 31 at least includes a magnetic support 310 connected to the bottom of the air-conducting bracket 30 , a main magnet 311 arranged on the surface of the magnetic support 310 facing the diaphragm assembly 32 , and a main pole core plate 313 connected to the main magnet 311 .

[0146] The magnetic support member 310 is made of a magnetic material and includes a plate-shaped magnetic bottom plate 3100. Optionally, the thickness of the magnetic bottom plate 3100 is 0.3 to 0.6 mm, so that it has a good magnetic conductivity and is conducive to preventing magnetic leakage. In some embodiments, reference Figure 26 and Figure 31 The magnetic support member 310 further 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 at least partially extends to be disposed opposite the main pole core plate 313, and a gap exists between the magnetic side plate 3101 and the main pole core plate 313, thereby forming an air magnetic gap 315. Optionally, the magnetic base plate 3100 is rectangular, and the magnetic side plates 3101 may be disposed only on two opposing sides of the magnetic base plate 3100, or on all four sides of the magnetic base plate 3100. A magnetic ring 3102 may also be disposed on the magnetic base plate 3100. Figures 27 to 29 This is a top view of the magnetic conductive support member 319 according to some embodiments of the present invention, so as to show the position and number of the magnetic conductive side plates 3101. Figure 27 In the embodiment shown, a magnetic conductive side plate 3101 is provided at each of the two short sides of the magnetic conductive bottom plate 3100. Figure 28 In the embodiment shown, a magnetic conductive side plate 3101 is provided at each of the two long sides of the magnetic conductive bottom plate 3100. Figure 29 In the embodiment shown, each of the four sides of the magnetic conductive bottom plate 3100 is provided with a magnetic conductive side plate 3101. It is understood that, in addition to being relatively independent, each magnetic conductive side plate 3101 can also be connected to form a ring. In some embodiments, such as Figures 30 to 33 As shown, Figure 31yes Figure 30 The cross-sectional view of the air conduction sound generating device 2 is shown. Figure 32 yes Figure 31 The enlarged view of Part III, Figure 33 yes Figure 30 A three-dimensional diagram of the magnetic support member 310, main magnet 311, and main pole core plate 313 in FIG. The magnetic support member 310 includes a magnetic base plate 3100 and a magnetic ring 3102 extending from the side edge of the 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 core plate 313, forming an air-conducting magnetic gap 315, into which the air-conducting coil 320 extends.

[0147] In some embodiments, reference Figure 34 , Figure 34 For the Figure 26 In the cross-sectional view taken along the JJ section line, the air-conducting magnetic circuit assembly 31 further includes a secondary magnet 312 connected to the magnetic base plate 3100 to increase the BL value of the air-conducting coil 320. The number of the secondary magnets 312 can be one or more. Optionally, the number of the secondary magnets 312 is an even number, with two opposing secondary magnets 312 located on either side of the main magnet 311. In some embodiments, the air-conducting magnetic circuit assembly 31 further includes a secondary pole core plate 314 connected to the secondary magnet 312. Optionally, each secondary magnet 312 is connected to at least one secondary pole core plate 314 on the surface 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 relative to 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 35 to 37 It is a top view of the air-conducting magnetic circuit assembly 31 , so as to show the positions and numbers of the secondary pole core plates 314 and the secondary magnets 312 . Figure 35 In the illustrated embodiment, a secondary magnet 312 and a secondary pole core plate 314 are correspondingly provided at each of the two short sides of the magnetic conductive base plate 3100 . Figure 36 In the illustrated embodiment, a secondary magnet 312 and a secondary pole core plate 314 are correspondingly provided at the two long sides of the magnetic conductive base plate 3100 . Figure 37In the illustrated embodiment, each of the four sides of the magnetic base plate 3100 is provided with a corresponding secondary magnet 312 and a secondary pole core plate 314. Optionally, the two ends of the secondary pole core plate 314 extend beyond the two ends of the secondary magnet 312 in the longitudinal direction to further enhance the magnetic conductivity. The distance L9 by which the secondary pole core plate 314 extends beyond the secondary magnet 312 in the longitudinal direction can be 0.03 to 0.2 mm. Optionally, the two ends of the secondary pole core plate 314 extend beyond the secondary magnet 312 by the same distance.

[0148] The magnetic poles of the main magnet 311 are aligned along the vibration direction B of the air-conducted sound-generating device 3. The magnetic poles of the secondary magnet 312 are also aligned along the vibration direction B, but in the opposite direction to the magnetic pole arrangement of the main magnet 311. It is understood that the vibration direction B of the air-conducted sound-generating device 3 is consistent with the vibration direction of the diaphragm 321. The provision of the secondary magnet 312 can enhance the magnetic field strength and increase the BL value, thereby improving the sensitivity of the air-conducted sound-generating device 3. The secondary pole core plate 314 can guide the magnetic flux lines. It cooperates with the main pole core plate 313 to ensure that the magnetic flux lines of the main magnet 311 and the secondary magnet 312 are more concentrated through the air-conducted coil 320 of the diaphragm assembly 32, thereby improving driving force and sensitivity.

[0149] It is understandable that the outer side of the secondary magnet 312 may or may not be provided with a magnetic conductive side plate 3101. Optionally, when a secondary magnet 312 is provided on one side of the main magnet 311, the magnetic conductive side plate 3101 is no longer provided on that side to reduce mass and volume. Figure 38 As shown, Figure 38 Shown Figure 24 A schematic diagram of the structure of the air-conducting magnetic circuit assembly 31 of the air-conducting sound-generating device 3. Magnetic side plates 3101 are provided on both short sides of the magnetic base plate 3100, but not on the long sides. Secondary magnets 312 are provided on the corresponding long sides of the magnetic base plate 3100. Optionally, the distance between the magnetic side plates 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.

[0150] like Figure 32 、 Figure 39 、 Figure 40 and Figure 41 As shown, the diaphragm 321 includes an outer ring 3210 connected to the air guide bracket 30, a flat intermediate sheet 3211 located within the outer ring 3210, and a folded ring portion 3212 located between the outer ring 3210 and the intermediate sheet 3211. The folded ring portion 3212 seals the area between the outer ring 3210 and the intermediate sheet 3211. The cross section of the folded ring portion 3212 is arc-shaped, and it can be concave toward the side where the air guide magnetic circuit assembly 31 is located (refer to FIG. Figure 39 and Figure 41), or it may protrude in a direction away from the side where the air-conducting magnetic circuit component 31 is located (refer to Figure 32 and Figure 40 Optionally, the outer ring piece 3210 is connected to the end surface 300 of the air conduction support 30, for example, by gluing (such as gluing or double-sided tape).

[0151] One end of the air conduction coil 320 is connected to the middle plate 3211 of the diaphragm 321 , and the other end extends into the air conduction magnetic gap 315 . It surrounds the outside of the main pole core plate 313 and is located inside the magnetic conduction side plate 3101 .

[0152] In some embodiments, reference Figure 26 and Figure 31 In order to enhance the strength of the middle piece 3211 and improve the sound quality, the diaphragm assembly 32 further includes a reinforcing sheet 3213 attached to the surface of the middle piece 3211. The material of the reinforcing sheet 3213 can be the same as or different from that of the diaphragm 321. It is understandable that when the reinforcing sheet 3213 is provided, the middle piece 3211 may not be fully enclosed. Figure 40 As shown, Figure 40 This is an exploded view of the diaphragm 321 and the reinforcement plate 3213 of an embodiment. An opening 32110 is provided in the middle of the middle plate 3211. The reinforcement plate 3213 is connected to the middle plate 3211 to seal the hole, which can reduce the mass of the diaphragm assembly 32.

[0153] Next, an example is given to illustrate the prevention of magnetic leakage interference between the bone conduction sound generating device 2 and the air conduction sound generating device 3.

[0154] In some embodiments, the maximum magnetic flux leakage at the outer peripheral surface 2a of the bone conduction sounding device 2 is smaller than the magnetic flux leakage at the end surfaces 2b at either end along the vibration direction A, thereby reducing interference with the air conduction sounding device 3. Furthermore, electronic components corresponding to the outer peripheral surface 2a of the bone conduction sounding device 2 can typically be positioned relatively close to the bone conduction support 20 and may overlap in the vibration direction A (e.g., positioned opposite the outer peripheral surface of the bone conduction sounding device 20). Since the bone conduction sounding device 2 has a relatively large vibration clearance from the electronic components in the vibration direction A, the impact on the electronic components is relatively small. Setting the magnetic flux leakage at the end surface 2b of the bone conduction sounding device 2 to be greater than that of the outer peripheral surface 2a of the bone conduction sounding device 2 can reduce the impact of magnetic flux leakage on external components while also reducing the difficulty of preventing magnetic flux leakage. The outer peripheral surface 2a of the bone conduction sounding device 2 refers to the outer surface of the bone conduction sounding device 2 located between the end surfaces 2b of the bone conduction sounding device 2 in the vibration direction A.

[0155] Furthermore, the maximum magnetic flux leakage at the bottom surface 3b of the air conduction sound-generating device 3 is smaller than the maximum magnetic flux leakage at the outer peripheral surface 2a of the bone conduction sound-generating device 2, which also makes its interference with the bone conduction sound-generating device 2 relatively small. The outer peripheral surface 3a of the air conduction sound-generating device 3 refers to the outer surface between the two end surfaces in the vibration direction B of the air conduction sound-generating device 3, and the bottom surface 3b of the air conduction sound-generating device 3 refers to the relatively more outwardly protruding surface of the air conduction bracket 30 and the magnetic conductive support member 310. In addition, it can be understood that Figure 8a In the illustrated embodiment, the magnetically conductive base plate 3100 of the air conduction sound-generating device 3 faces the interior of the housing assembly 100. This magnetic shielding effect of the magnetically conductive base plate 3100 and the bone conduction support 20 can reduce magnetic fields leaking into the housing assembly 100, minimizing the impact of magnetic flux leakage on other electronic components. The magnetically conductive base plate 3100 of the air conduction sound-generating device 3 is positioned opposite the bone conduction support 20 of the bone conduction sound-generating device 2. The magnetically conductive base plate 3100 is closer to the bone conduction sound-generating device 2 than to the diaphragm assembly 32. When the bone conduction support 20 is also magnetically conductive, this base plate 3100 provides a certain degree of magnetic shielding, effectively reducing mutual interference from magnetic flux leakage. It is understood that when subjected to significant magnetic flux leakage interference, a uniform magnetic field may become unbalanced, thereby affecting the vibration balance of the vibrating components. Furthermore, the opposing magnetic fields may offset some of the magnetic fields, resulting in a reduction in BL. Therefore, reducing mutual interference from magnetic flux leakage helps ensure stable vibration of the vibrating components of the bone conduction sound-generating device 2 and the air conduction sound-generating device 3, ensuring operational reliability and sound quality.

[0156] The magnetically conductive side plates 3101 of the air-conducting sound-generating device 3 can reduce magnetic field leakage from the sides of the air-conducting sound-generating device 3. Generally, the greater the number of magnetically conductive side plates 3101, the less magnetic field leakage. Optionally, multiple magnetically conductive side plates 3101 can be connected in a ring shape (i.e., a magnetic conductive ring 3102) to further reduce lateral magnetic flux leakage from the air-conducting sound-generating device 3. Furthermore, the magnetically conductive side plates 3101 can be at least partially located within the mounting slots 10041. In this way, lateral magnetic flux leakage from the air-conducting sound-generating device 3 can have a lesser impact on components within the housing assembly 100.

[0157] The magnitude of the magnetic flux leakage can be measured by a Tesla meter (or Gauss meter). Specifically, the probe is moved along the outer peripheral surface 2a of the bone conduction stent 20 while being in close contact with the outer peripheral surface 2a. The maximum value is taken as the maximum magnetic flux leakage value at the outer peripheral surface 2a. When the outer peripheral surface is a step structure (for example, Figure 32 Similarly, the probe is moved within the plane of the end surface 2b while being in close contact with the end surface 2b, and the maximum value is taken as the maximum leakage magnetic flux value at the end surface 2b.

[0158] In some embodiments, the maximum magnetic flux leakage at the top surface 3d of the air conduction sound device 3 is smaller than the maximum magnetic flux leakage at the outer peripheral surface 2a of the bone conduction sound device 2. Figure 8b When the top surface 3d of the air conduction sound emitting device 3 is installed toward the bone conduction sound emitting device 2, its diaphragm assembly 32 is arranged opposite to the bone conduction sound emitting device 20. The diaphragm assembly 32 is closer to the bone conduction sound emitting device 2 than the magnetic conductive bottom plate 3100. At this time, the maximum leakage magnetic flux at the top surface 3d of the air conduction sound emitting device 3 is set to be smaller than the maximum leakage magnetic flux at the outer peripheral surface 2a of the bone conduction sound emitting device 2, which can reduce the interference of its leakage magnetic flux on the bone conduction sound emitting device 2. The top surface 3d of the air conduction sound emitting device 3 refers to the outer surface of the component within the folding ring portion 3212 of the diaphragm 321. For example, when the air conduction sound emitting device 3 does not include the reinforcement plate 3213, the outer surface of the middle plate 3211 of the diaphragm 321 is the top surface 3d. When the air conduction sound emitting device 3 includes the reinforcement plate 3213, the outer surface of the reinforcement plate 3213 is the top surface 3d.

[0159] In some embodiments, the maximum magnetic flux leakage at the top surface 3d and bottom surface 3b of the air conduction sound-generating device 3 is less than the maximum magnetic flux leakage at the outer peripheral surface 2a of the bone conduction sound-generating device 2, so that the magnetic flux leakage interference between the two sound-generating devices is relatively small, regardless of whether the air conduction sound-generating device 3 is installed facing or facing away from the bone conduction sound-generating device 2. Optionally, the maximum magnetic flux leakage range at the outer peripheral surface 3a of the air conduction sound-generating device 3 is 10mT to 120mT, and the maximum magnetic flux leakage range at the top surface 3d and bottom surface 3b of the air conduction sound-generating device 3 is 20 to 150mT. Further, optionally, the maximum magnetic flux leakage range at the outer peripheral surface 3a of the air conduction sound-generating device 3 is 20 to 80mT, and the maximum magnetic flux leakage range at the top surface 3d and bottom surface 3b of the air conduction sound-generating device 3 is 30mT to 100mT.

[0160] The magnitude of the magnetic flux leakage can be measured by a Tesla meter (or Gauss meter). Specifically, the probe is moved along the outer peripheral surface 3a of the air conduction support 30 while being in close contact with the outer peripheral surface 3a. The maximum value is taken as the maximum magnetic flux leakage value at the outer peripheral surface 3a. When the outer peripheral surface is a step structure (for example, Figure 32 , the measurement is performed on the outermost surface of the air conduction support 30. Similarly, the probe is moved in close contact with the bottom surface 3b within the plane of the bottom surface 3b, and the maximum value is taken as the maximum magnetic flux leakage value at the bottom surface 3b. The probe is moved in close contact with the top surface 3d within the plane of the top surface 3d, and the maximum value is taken as the maximum magnetic flux leakage value at the top surface 3d.

[0161] In some embodiments, the bone conduction sound device 2 and the air conduction sound device 3 are not in contact, but are spaced apart. Optionally, the distance L8 between the bone conduction sound device 2 and the air conduction sound device 3 is greater than or equal to 0.3 mm, which can reduce the mutual interference of vibration between the bone conduction sound device 2 and the air conduction sound device 3 and reduce the mutual influence of leakage magnetic field between the two. Figure 8a In the embodiment shown, the distance L8 is the distance between the magnetic base plate 3100 and the bone conduction support 20. Figure 8b In the illustrated embodiment, the distance L8 is the distance between the folding ring portion 3212 and the bone conduction support 20. It can be understood that when the folding ring portion 3212 is concave, the distance L8 is the distance between the top surface 3d and the bone conduction support 20. Further, the distance L8 can be 0.3 to 6 mm to improve the space utilization of the sound unit and enable the device to achieve a more miniaturized design. The larger the distance L8, the larger the air conduction back cavity can be, but it will obviously cause the volume and weight of the sound unit 10 to increase simultaneously, thereby increasing the weight of the entire headset, increasing the sense of weight when wearing it, and affecting the user experience. At the same time, because of the increase in weight, the vibration mass will increase simultaneously, and the sensitivity at high frequencies will decrease. The sound heard by people is not full and delicate enough, affecting the final listening quality. Further optionally, the distance L8 is 0.5 to 2 mm to further reduce the volume, reduce the mass, and improve the listening effect. Optionally, Figure 8a In the embodiment shown, the surface of the air conduction sound emitting device 3 facing the bone conduction sound emitting device 2 (i.e., the bottom surface 3b) is parallel to the surface of the bone conduction sound emitting device 2 facing the air conduction sound emitting device 3. Figure 8b In the illustrated embodiment, the surface of the air conduction sound emitting device 3 facing the bone conduction sound emitting device 2 (ie, the top surface 3d) is parallel to the surface of the bone conduction sound emitting device 2 facing the air conduction sound emitting device 3, so as to fully utilize the space.

[0162] The following is an example description of the volume, mass and density of the bone conduction sound generating device 2 and the air conduction sound generating device 3.

[0163] In some embodiments, the volume of the sound unit 10 (referring to a single sound unit 10) ranges from 2500 to 5500 mm 3 , so that the earphone head is neither too large nor too small, thereby improving wearing comfort and providing sufficient space for the internal sound device and other components. The volume of the sound unit 10 is the volume of the sound unit 10 after removing the ear hook 111, for example, the volume of the sound unit 10 obtained by cutting off the connection 111a between the ear hook 111 and the sound unit 10.

[0164] The volume of an object (such as the bone conduction sound-generating device 2, the air conduction sound-generating device 3, and the sound-generating unit 10, etc.) is calculated by the size of the space it occupies. The cavity or hollow part of the object is also included in its volume. For regular objects, such as rectangular parallelepiped, cylinder, or rectangular parallelepiped, cylindrical, etc., the volume can be calculated by multiplying the bottom area by the height. The volume of the sound-generating device (bone conduction sound-generating device 2 and air conduction sound-generating device 3) can be calculated by multiplying the maximum cross-sectional area by the thickness. The cross-section of the sound-generating device is perpendicular to its thickness direction. The cross-sectional area refers to the area enclosed by the outer contour of the cross-section. The maximum cross-sectional area can be obtained by measuring the area enclosed by the maximum outer contour of the sound-generating device in the thickness direction. For example, Figure 11a The maximum cross-sectional area of the bone conduction sound generating device 2 shown can be approximately equal to the area enclosed by the outer contour of its bone conduction support 20. Figure 24 and Figure 30 The maximum cross-sectional area of the air conduction sound generating device 3 shown can be approximately equal to the area enclosed by the outer contour of the end face 300 of the air conduction support 30. For other irregular objects, the volume can be calculated by three-dimensionally scanning the outer contour of the object.

[0165] The larger the size of the bone conduction sound-generating device 2, the larger the size of its bone conduction bracket 20, internal bone conduction magnetic circuit assembly 21, and bone conduction coil 22, thereby enabling the bone conduction sound-generating device 2 to provide greater loudness. However, a larger size compresses the installation space for the air conduction sound-generating device 3 and other components, affecting the sound quality of the air conduction sound-generating device 3. Similarly, a smaller air conduction sound-generating device 3 can save space within the device, allowing more space for other headphone components (bone conduction sound-generating device, circuit board, etc.), thereby improving the functionality and performance of the device.

[0166] In some embodiments, the volume of the bone conduction sound generating device 2 is set to 600-1000mm 3 The volume of the air conduction sound generating device 3 is 180~500mm 3 , so that its volume is more appropriate, the volume of the bone conduction sound device 2 and the air conduction sound device 3 is balanced. Further optionally, the volume of the bone conduction sound device 2 can be selected to be 700-900mm 3 The volume of the air conduction sound generating device 3 is 220~360mm 3 , so as to further make the space occupied by the bone conduction sound device 2 and the air conduction sound device 3 more reasonable.

[0167] In some embodiments, the volume ratio of the air conduction sound-emitting device 3 and the sound-emitting unit 10 is 0.03 to 0.18. The size of the volume ratio reflects the volume utilization rate. Generally, the larger the ratio, the larger the air conduction magnetic circuit component 31 of the air conduction sound-emitting device 3 can be made, and the effective radiation area of the diaphragm can also be made larger, and the corresponding acoustic effect is better. For example, the sensitivity of the air conduction sound-emitting device 3 will be improved. However, if the air conduction sound-emitting device 3 is too large, it will be inconvenient to install other parts, and it will occupy the space of the bone conduction sound-emitting device 2, affecting the sound effect of the bone conduction sound-emitting device 2. If the volume ratio is too small, the internal space will be wasted, which is not conducive to miniaturizing and reducing the weight of the earphones. The volume ratio of the bone conduction sound device 2 to the sound unit 10 is 0.12 to 0.32. Similarly, the larger the ratio, the better the acoustic effect, such as the sensitivity of the bone conduction sound device 2. However, if the bone conduction sound device 2 is too large, it will be inconvenient to install other parts, and it will occupy the space of the air conduction sound device 3, affecting the sound effect of the air conduction sound device 3. If the volume ratio is too small, the internal space will be wasted, which is not conducive to miniaturization and weight reduction of the earphone.

[0168] Further optionally, the volume ratio of the air conduction sounding device 3 and the sounding unit 10 is 0.06-0.12, and the volume ratio of the bone conduction sounding device 2 and the sounding unit 10 is 0.18-0.28, so as to further make the space ratio occupied by the bone conduction sounding device 2 and the air conduction sounding device 3 more reasonable.

[0169] In some embodiments, to balance the volume and performance of the bone conduction sound-generating device 2 and the air conduction sound-generating device 3, the volume of the bone conduction sound-generating device 2 is larger than that of the air conduction sound-generating device 3. Optionally, the volume ratio of the bone conduction sound-generating device 2 to the air conduction sound-generating device 3 is 1.5 to 4.5. The larger volume of the bone conduction sound-generating device 2 facilitates greater vibration, while the air conduction sound-generating device 3, which relies on the diaphragm to generate sound, can achieve an air conduction sound transmission effect with a smaller volume. This balances the volume of the air and bone conduction sounds, improving the overall sound quality of the sound-generating unit. The volume ratio of the bone conduction sound-generating device 2 to the air conduction sound-generating device 3 can further be selected to be 1.7 to 4.2, and even more preferably 2 to 3.6, to further enhance the sound quality and facilitate installation within the housing assembly 100.

[0170] It should be noted that, in the absence of conflict, the various embodiments in this document can be combined with each other to obtain more implementation plans.

[0171] The above is only a specific implementation of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the scope of protection of the present invention.

Claims

1. A sound unit, characterized in that: include: The housing assembly (100) comprises a housing (1000) with an open end and a cover (1001) connected to the open end of the housing (1000), wherein the housing (1000) is provided with a sound outlet hole (1003); A bone conduction sound generating device (2) is provided in the housing component (100) and is connected to the face cover (1001). The bone conduction sound generating device (2) is provided along the length direction of the housing component (100), and the positive direction of its vibration direction A points toward the contact surface (10010) between the face cover (1001) and the human body. An air-conducting sound-generating device (3) is provided in the housing assembly (100) and is connected to the housing (1000). The air-conducting sound-generating device (3) is provided along the length direction of the housing assembly (100). The air-conducting sound-generating device (3) emits sound outward through the sound outlet (1003); The bone conduction sound emitting device (2) and the air conduction sound emitting device (3) are arranged along the width direction of the housing component (100), and the air conduction sound emitting device (3) is arranged on one side of the width direction of the bone conduction sound emitting device (2), and the air conduction sound emitting device (3) is arranged facing or facing away from the bone conduction sound emitting device (2), and the distance between the bone conduction sound emitting device (2) and the air conduction sound emitting device (3) is 0.3 mm to 6 mm.

2. The sound unit according to claim 1, wherein The bone conduction sound generating device (2) is in the shape of a rectangular parallelepiped, and its length direction is consistent with the length direction of the housing component (100). The bone conduction sound generating device (2) and the air conduction sound generating device (3) are located in the same cavity, or are respectively arranged in two independent cavities.

3. The sound unit according to claim 2, wherein: The surface of the bone conduction sound emitting device (2) facing the air conduction sound emitting device (3) is parallel to the surface of the air conduction sound emitting device (3) facing the bone conduction sound emitting device (2).

4. The sound unit according to claim 1, wherein: The distance between the bone conduction sound generating device (2) and the air conduction sound generating device (3) is 0.5 mm to 2 mm.

5. The sound unit according to claim 1, wherein: The angle α1 between the vibration direction A of the bone conduction sound emitting device (2) and the contact surface (10010) is 60° to 90°, the angle α2 between the vibration direction B of the air conduction sound emitting device (3) and the contact surface (10010) is 0° to 45°, and the angle between the vibration direction A of the bone conduction sound emitting device (2) and the vibration direction B of the air conduction sound emitting device (3) is not zero.

6. The sound unit according to claim 5, wherein: The angle α1 between the vibration direction A of the bone conduction sound generating device (2) and the contact surface (10010) is 75° to 90°, and the angle α2 between the vibration direction B of the air conduction sound generating device (3) and the contact surface (10010) is 0° to 30°.

7. The sound unit according to claim 6, wherein: The angle α1 between the vibration direction A of the bone conduction sound generating device (2) and the contact surface (10010) is 90°, and the angle α2 between the vibration direction B of the air conduction sound generating device (3) and the contact surface (10010) is 0-15°.

8. The sound unit according to claim 1, wherein: The positive direction of the vibration direction B of the air conduction sound emitting device (3) points to the plane where the contact surface (10010) is located, and extends in a direction away from the bone conduction sound emitting device (2); the vibration direction A of the bone conduction sound emitting device (2) is tilted relative to the contact surface (10010), and the positive direction of the vibration direction A extends in a direction away from the air conduction sound emitting device (3), so that the component forces parallel to the contact surface (10010) generated when the bone conduction sound emitting device (2) and the air conduction sound emitting device (3) vibrate positively or negatively at the same time are at least partially offset.

9. The sound unit according to claim 1, wherein: The thickness of the bone conduction sound generating device (2) is greater than the thickness of the air conduction sound generating device (3).

10. The sound unit according to claim 9, wherein: The thickness of the bone conduction sound generating device (2) is 5 to 6.5 mm.

11. The sound generating unit according to claim 10, wherein: The thickness of the bone conduction sound generating device (2) is 5.5-6 mm.

12. The sound unit according to claim 9, wherein: The thickness of the air conduction sound generating device (3) is 1.5 to 3 mm.

13. The sound unit according to claim 9, wherein: The ratio of the thickness of the bone conduction sound generating device (2) to the thickness of the air conduction sound generating device (3) is 1.7 to 3.

14. The sound unit according to claim 1, wherein: The volume ratio of the bone conduction sound generating device (2) to the sound generating unit (10) is 0.12 to 0.

32.

15. The sound unit according to claim 14, wherein: The volume ratio of the bone conduction sound generating device (2) to the sound generating unit (10) is 0.18 to 0.

28.

16. The sound unit according to claim 14, wherein: The volume ratio of the bone conduction sound generating device (2) to the air conduction sound generating device (3) is 1.5 to 4.

5.

17. The sound generating unit according to claim 16, wherein: The volume ratio of the bone conduction sound generating device (2) to the air conduction sound generating device (3) is 1.7 to 4.

2.

18. The sound generating unit according to any one of claims 1 to 17, characterized in that: The shell (1000) includes a tubular side shell portion (1004). When the sound unit is worn, the side shell portion (1004) has a proximal end (10040) close to the human ear in its width direction, the sound outlet hole (1003) is provided at the proximal end (10040), and the air conduction sound generating device (3) emits sound toward the proximal end (10040).

19. The sound unit according to claim 18, wherein: The air-conduction sound-generating device (3) includes a diaphragm (321) for vibrating and generating sound, the sound-generating unit (10) includes a front cavity (10042) and a rear cavity (10044) separated by the diaphragm (321), and the housing (1000) includes at least one through hole (10000) communicating with the rear cavity (10044).

20. The sound unit according to claim 19, wherein: The volume of the front cavity (10042) is 10 to 250 mm 3 .

21. The sound generating unit according to claim 20, wherein: The volume of the front cavity (10042) is 50 to 200 mm 3 .

22. The sound generating unit according to claim 19, wherein: The total area of all the through holes (10000) is 1 to 80 mm 2 .

23. The sound generating unit according to claim 22, wherein: The total area of all the through holes (10000) is 5 to 40 mm 2 .

24. The sound generating unit according to any one of claims 1 to 17, characterized in that: The bone conduction sound generating device (2) comprises: A bone conduction stent (20), wherein the bone conduction stent (20) is annular and is made of a magnetic conductive material or a non-magnetic conductive material; A bone conduction magnetic circuit assembly (21) is provided in the bone conduction support (20), comprising at least one magnet (210) and at least two magnetic conductive plates (211), wherein the magnet (210) is connected between two adjacent magnetic conductive plates (211), the magnetic poles of the magnet (210) are arranged along the vibration direction A of the bone conduction sound generating device (2), and when the number of the magnets (210) is greater than or equal to two, two adjacent magnets (210) are arranged with the same poles facing each other; A bone conduction coil (22) is disposed in the bone conduction support (20) and fixed relative to the bone conduction support (20), and at least one of the magnetic conductive plates (211) is surrounded by the bone conduction coil (22); and The spring piece (23) is connected between the bone conduction magnetic circuit component (21) and the bone conduction bracket (20).

25. The sound generating unit according to claim 24, wherein: It comprises two spring pieces (23) respectively connected to the two end faces (202) of the bone conduction support (20); the spring piece (23) comprises an outer frame (230) connected to the end face (202), an inner frame (231) connected to the bone conduction magnetic circuit component (21), and an elastic arm (232) connected between the outer frame (230) and the inner frame (231); the outer frame (230) and the inner frame (231) are spaced apart, and the inner frame (231) is closer to the bone conduction magnetic circuit component (21) in the vibration direction A than the outer frame (230).

26. The sound unit according to claim 25, wherein: The spacing distance between the outer frame (230) and the inner frame (231) along the vibration direction A is 0.35 to 0.8 mm.

27. The sound generating unit according to claim 26, wherein: The spacing distance between the outer frame (230) and the inner frame (231) along the vibration direction A is greater than the maximum amplitude of the bone magnetic circuit component (21) when it is working.

28. The sound generating unit according to claim 26, wherein: The maximum amplitude of the bone magnetic circuit component (21) during operation is 0.2-0.7 mm.

29. The sound unit according to claim 26, wherein: The spacing distance between the outer frame (230) and the inner frame (231) along the vibration direction A is 0.4 to 0.65 mm, and the maximum amplitude of the bone magnetic circuit component (21) during operation is 0.3 to 0.5 mm.

30. The sound generating unit according to any one of claims 1 to 17, characterized in that: The air conduction sound generating device (3) comprises: An air conduction stent (30), wherein the air conduction stent (30) is ring-shaped; An air-conducting magnetic circuit component (31) is provided in the air-conducting support (30), comprising a magnetic conductive base plate (3100) and a main magnet (311) and a main pole core plate (313) connected to the magnetic conductive base plate (3100); the air-conducting magnetic circuit component (31) further comprises a magnetic conductive side plate (3101) connected to the magnetic conductive base plate (3100) and / or a secondary magnet (312) connected to the magnetic 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 magnetic conductive side plate (3101) and / or the secondary pole core plate (314) and the main pole core plate (313); and, A diaphragm assembly (32) comprises a diaphragm (321) connected to the air conduction support (30) and an air conduction coil (320) connected to the diaphragm (321), wherein the air conduction coil (320) is located in the air conduction magnetic gap (315).

31. The sound unit according to claim 30, wherein: The diaphragm assembly (32) is closer to the bone conduction sound generating device (2) relative to the magnetic base plate (3100); or, The magnetic base plate (3100) is closer to the bone conduction sound generating device (2) than the diaphragm assembly (32).

32. A head-mounted sound device, characterized in that: The invention comprises a sound-emitting unit (10) according to any one of claims 1 to 31 and a wearing mechanism (11) for wearing the sound-emitting unit (10) on a human head.

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