Head-mounted sound production equipment

Abstract

The invention discloses a head-mounted sound production device, which relates to the technical field of sound production devices and comprises two sound production units, two functional bins, ear hooks and a rear hanger. The sound production unit comprises a shell assembly, and a bone conduction sound production device and an air conduction sound production device which are arranged in the shell assembly; the functional bin is used for accommodating a control circuit board and / or a battery; the ear hook is suitable for being hooked on an ear, and the shell assembly and the function bin are connected through the ear hook; the rear hanger is suitable for surrounding the rear side of the head and is connected between the two functional bins; wherein the ratio of the total mass of the two sound production units to the total mass of the two functional bins and the rear hanger is 0.7-1.3, and the mass of the two sound production units is close to the total mass of the functional bins and the rear hanger, so that the mass of the front and the back of the ear is more balanced and consistent, and the comfort and the stability of wearing 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 present invention relates to the technical field of sound-generating devices, and in particular to 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 generate sound. According to different sound transmission methods, the sound-generating devices can be divided into bone conduction sound-generating devices and air conduction sound-generating devices.

[0004] The bone conduction sound generating device usually includes a coil and a magnetic circuit component, and the magnetic circuit component is driven to vibrate by energizing the coil. The bone conduction sound generating device is usually connected to a housing (such as the housing of the earphone head), and the vibration is transmitted to the human facial skin through the housing, so that the person can hear the sound.

[0005] The air conduction sound-generating device usually 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 is driven to vibrate due to the interaction with the magnetic force of the magnetic circuit assembly, thereby actuating the air to produce sound.

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

[0007] For example, conventional headphones are usually only equipped with a bone conduction sound generator or an air conduction sound generator, which can only generate sound through bone conduction or air conduction, and the sound generation method is relatively single. The applicant has found that if a bone conduction sound generator and an air conduction sound generator are simultaneously provided in one sound generator unit, it is beneficial to improve the sound generation effect and expand the sound generation method. However, if the arrangement positions of the bone conduction sound generator and the air conduction sound generator are unreasonable, it is easy to cause the vibration to be weak and the sound to be small, resulting in poor listening effect and insufficient comfort when wearing.

[0008] For another example, if the quality of the earphone head is unreasonable, it is easy for the earphone to swing up and down when the user wears the earphone and exercises, affecting the wearing stability and comfort.

[0009] For example, if the size of the earphone head is unreasonable, it will also affect the wearing comfort.

[0010] 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).

[0011] The above contents are only used to help understand the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0012] The object of the present invention is to provide a head-mounted sound-generating device with better listening effect and better wearing comfort.

[0013] To achieve the above-mentioned object of the invention, the present invention proposes a head-mounted sound-generating device, comprising:

[0014] Two sound-generating units, each of which comprises a housing component and a bone conduction sound-generating device and an air conduction sound-generating device both disposed in the housing component;

[0015] Two functional compartments, each of which is used to accommodate a control circuit board and / or a battery;

[0016] An ear hook, suitable for hooking on the ear, wherein the housing component and the functional compartment are connected via the ear hook; and

[0017] A rear hanging device, adapted to be wrapped around the back of the head and connected between the two functional compartments;

[0018] Wherein, the ratio of the total mass of the two sound-emitting units to the total mass of the two functional compartments and the rear suspension is 0.7 to 1.3.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the head-mounted sound-emitting device comprises two sound-emitting units, two functional chambers, a back hanger, and an ear hanger connected between the sound-emitting unit and the functional chamber. The sound-emitting unit comprises a bone conduction sound-emitting device and an air conduction sound-emitting device, which can use the bone conduction sound-emitting device and the air conduction sound-emitting device to emit sound, thereby improving the diversity of the sound-emitting mode, and can use the working frequency bands that the bone conduction sound-emitting device and the air conduction sound-emitting device are good at, thereby improving the listening effect. In addition, the total mass of the two sound-emitting units of the head-mounted sound-emitting device and the total mass of the two functional chambers and the back hanger is 0.7 to 1.3, and the mass of the two sound-emitting units is relatively close to the total mass of the functional chambers and the back hanger, so that the mass before and after the ear is more balanced and consistent, thereby improving the comfort and stability of wearing. The stable wearing of the sound-emitting unit reduces the energy leakage of vibration during the conduction process, especially the energy leakage in the low-frequency band, so that the vibration can be more effectively transmitted to the skull, thereby enhancing the low-frequency perception. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a head-mounted sound-emitting device in some embodiments of the present invention.

[0021] 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.

[0022] Figure 3 Schematic diagram of the sound generating unit of some embodiments of the present invention.

[0023] Figure 4 2 is a schematic cross-sectional view of a sound-emitting unit in some embodiments of the present invention, in which the housing is integral.

[0024] Figure 5 1 is a schematic cross-sectional view of a sound-emitting unit in some embodiments of the present invention, in which the housing is split.

[0025] Figure 6 It is a schematic diagram of the structure of the sound-emitting unit of some embodiments of the present invention.

[0026] Figure 7 yes Figure 6 An exploded view of the sound unit is shown.

[0027] Figure 8a yes Figure 6 A schematic cross-sectional view of a sound unit is shown.

[0028] Figure 8b It is a schematic diagram of the structure of the sound-emitting unit of some embodiments of the present invention.

[0029] Figure 8c Schematic diagram of the structure of the sound unit of some embodiments of the present invention, the structure of the bone conduction magnetic circuit component in the figure is Fig.17a Consistent in.

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

[0031] Fig.10 Schematic diagram of the sound generating unit of some embodiments of the present invention.

[0032] Fig.11 It is a frequency response curve diagram when the sound-emitting units of some embodiments of the present invention have sound outlet holes of different areas.

[0033] Fig.12 It is a frequency response curve diagram of some embodiments of the present invention when the sound-emitting units have front cavities of different volumes.

[0034] Fig.13a It is a schematic diagram of the structure of the bone conduction sound generating device of some embodiments of the present invention.

[0035] Fig.13b yes Fig.17a A cross-sectional schematic diagram of a bone conduction sound generating device is shown.

[0036] Fig.14Schematic diagram of the cross-section 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 Fig.17a Consistent in.

[0037] Fig.15 Schematic diagram of the structure of the bone conduction sound generating device of some embodiments of the present invention, in which the bone conduction support is in the shape of a racetrack.

[0038] Fig.16a It is a schematic diagram of the structure of the bone magnetic circuit assembly of some embodiments of the present invention.

[0039] Fig.16b yes Fig.16a The bone conduction magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0040] Fig.17a It is a schematic diagram of the structure of the bone magnetic circuit assembly of some embodiments of the present invention.

[0041] Fig.17b yes Fig.17a The bone conduction magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0042] Fig.18a It is a schematic diagram of the structure of the bone magnetic circuit assembly of some embodiments of the present invention.

[0043] Fig.18b yes Fig.18a The bone conduction magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0044] Fig.19a It is a schematic diagram of the structure of the bone magnetic circuit assembly of some embodiments of the present invention.

[0045] Fig.19b yes Fig.19a The bone conduction magnetic circuit assembly shown is a schematic diagram of an integrated part.

[0046] Fig.20a It is a schematic diagram of the structure of the shrapnel in Figure 13.

[0047] Fig.20b yes Fig.20a A top view of the shrapnel shown.

[0048] Fig.21 It is a schematic diagram of the structure of the spring pieces in some embodiments of the present invention.

[0049] Fig. 22 It is a schematic diagram of the structure of the spring pieces in some embodiments of the present invention.

[0050] Fig.23a and Figure 23b The applications are Fig.20aThe simulation diagrams of the first-order mode and the second-order mode of the bone conduction sound-generating device of the shrapnel shown.

[0051] Fig.24a 1 is a cross-sectional view of a bone conduction sound generating device according to some embodiments of the present invention.

[0052] Figure 24b is a cross-sectional view of a bone conduction sound generating device in some embodiments of the present invention, in which the structure of the bone conduction magnetic circuit assembly is Fig.17a Consistent in.

[0053] Fig.25 It is a schematic diagram of the structure of the air conduction sound generating device of some embodiments of the present invention.

[0054] Fig.26 yes Fig.25 A top view of the air conduction sound generating device is shown.

[0055] Fig. 27 is along Fig.26 Sectional view obtained by cutting along the MM cutting line.

[0056] Fig.28 1 is a top view of a magnetic conductive support member according to some embodiments of the present invention.

[0057] Fig.29 1 is a top view of a magnetic conductive support member according to some embodiments of the present invention.

[0058] Fig.30 1 is a top view of a magnetic conductive support member according to some embodiments of the present invention.

[0059] Fig.31 It is a schematic diagram of the structure of the air conduction sound generating device of some embodiments of the present invention.

[0060] Fig.32 yes Fig.31 A cross-sectional view of the air conduction sound generating device shown.

[0061] Fig.33 yes Fig.32 Enlarged view of part III.

[0062] Fig.34 yes Fig.31 A schematic diagram of the positions of the magnetic support, main magnet and main pole core plate of the air-conducted sound-generating device is shown.

[0063] Fig.35 is along Fig. 27 Sectional view obtained along the JJ cutting line.

[0064] Fig.36 It is a schematic diagram of the positions of magnetic support members, auxiliary magnets and auxiliary pole core plates in some embodiments of the present invention.

[0065] Fig.37 It is a schematic diagram of the positions of magnetic support members, auxiliary magnets and auxiliary pole core plates in some embodiments of the present invention.

[0066] Fig.38 It is a schematic diagram of the positions of magnetic support members, auxiliary magnets and auxiliary pole core plates in some embodiments of the present invention.

[0067] Fig.39 yes Fig. 27 The schematic diagram of the structure of the air-conducting magnetic circuit component of the air-conducting sound-generating device is shown.

[0068] Fig.40 yes Fig. 27 Enlarged view of part II.

[0069] Fig.41 yes Fig.31 An exploded view of the diaphragm assembly in Figure 1.

[0070] Fig.42 yes Fig.25 Schematic diagram of the structure of the diaphragm assembly.

[0071] Fig.43 yes Fig.25 The schematic diagram shown is a diagram of an air conduction sound generating device provided with double-sided tape. DETAILED DESCRIPTION

[0072] In order to make the above-mentioned purposes, 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 is to 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 structures related to the present application are shown in the accompanying drawings, rather than all structures. 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.

[0073] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0074] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0075] The area of ​​a hole mentioned in this article refers to the area of ​​the region enclosed by the outer contour of the hole.

[0076] The dimensions or dimension ranges such as “length”, “width”, “height”, “thickness”, and “wall thickness” mentioned in this article, unless otherwise specified, refer to the dimensions or dimension ranges of the largest part in the corresponding direction.

[0077] The embodiment of this specification describes a head-mounted sound-emitting device, which 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.

[0078] 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.

[0079] In some embodiments, the head-mounted sound-emitting device includes a sound-emitting unit 10, and the sound-emitting unit 10 is worn on the left ear or the 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., and it includes two sound-emitting units. Depending on the product, the head-mounted sound-emitting device may also include a back hook and an ear hook or a frame.

[0080] The following is an example in which the head-mounted sound-emitting device is a binaural headset.

[0081] like Figure 1 As shown, Figure 1 The head-mounted sound device shown in the figure is a binaural earphone, which includes two sound units 10 (or earphone heads), and also includes a rear hanger 110 suitable for surrounding the back of the head, two ear hangers 111 suitable for hooking on the ears, and two functional compartments, the functional compartments are 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, and for another example, each functional compartment accommodates a control circuit board and / or a battery. The rear hanger 110 is connected between the two functional compartments, the two sound units 10 are respectively arranged corresponding to the two functional compartments, and the sound units 10 and the corresponding functional compartments are connected through the ear hangers 111. Specifically, the rear hanger 110 is connected between the control compartment 112 and the battery compartment 113, and the control compartment 112 and one of the sound units 10 and the battery compartment 113 and the other sound unit 10 are all connected through 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.

[0082] It can be understood that although this specification takes 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.

[0083] The head-mounted sound device is symmetrical as a whole to improve wearing comfort. Figure 1 and Figure 2As shown, the functional compartment has a side surface 1123 facing the human body when the head-mounted sound device is worn, and the sound unit 10 has a contact surface 10010 that contacts the human skin when the head-mounted sound device is worn. The angle β1 formed between the side surface 1123 and the contact surface 10010 and facing 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 range of the angle β1 is 160°~170°. When the head-mounted sound 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 head skin. The gap forms a space for placing the temples of the glasses, so that when the user wears the glasses, the temples of the glasses and the ear hooks of the headphones, especially the bent parts, do not interfere or interfere less, which makes it more convenient to wear the glasses and headphones at the same time, and enhances the stability of the glasses. In addition, the functional compartment can press against the back of the external ear, and the sound unit 10 is deflected toward the side where the head is located, so as to fit more closely to the facial skin, thereby ensuring the stability of the earphone when worn. 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 difficulty in wearing or discomfort.

[0084] 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.

[0085] 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 reference Figure 3 , the most convex point or the most concave point of the arc surface has a tangent plane 10011, and the angle with the surface can be understood as the angle with the tangent plane 10011 of the surface. 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, and 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.

[0086] Next, the sound unit of the head-mounted sound device is explained with examples.

[0087] The sound unit 10 includes a housing assembly 100 and a sound device disposed inside the housing assembly 100. Optionally, the housing assembly 100 is formed by connecting at least two housings. In some embodiments, Figure 4As shown, the housing assembly 100 includes a housing 1000 with an opening at one end and a face cover 1001 that seals the open end of the housing 1000. The housing 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 may be, for example, silicone. It is understandable that the surface of the face cover 1001 that contacts the facial skin is the contact surface 10010. In other embodiments, such as Figure 5 As shown, the housing 1000 is formed by connecting two parts, including a side housing portion 1004 and a back cover 1002. The front 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 housing portion 1004. Optionally, the side housing portion 1004 is tubular. The side housing 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 housing portion 1004 are integral. The housing 1000 is not limited to only having one opening. In other embodiments, the housing 1000 can also be provided with two or more openings, for example, the side housing portion 1004 can be provided with a notch and sealed by a cover body or other components.

[0088] 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 .

[0089] The sound-generating device is used to convert electrical signals into mechanical vibrations. For example, the sound-generating device may 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 that fits the facial skin, so that the person can hear the sound through bone conduction. The sound-generating device may also be an air conduction sound-generating device, which agitates the air to vibrate through mechanical vibrations, thereby forming air conduction sound. It is to be understood that the housing assembly 100 is not limited to installing only one or one type of sound-generating device.

[0090] In some embodiments, Figure 4 and Figure 5 As shown, the sound unit 10 can transmit sound by bone conduction and air conduction at the same time. At this time, a bone conduction sound device 2 and an air conduction sound device 3 are provided therein. Optionally, the bone conduction sound device 2 is connected to the face cover 1001 and / or the back cover 1002.

[0091] It can be understood that when the sound-emitting unit 10 has independently arranged bone conduction sound-emitting device 2 and air conduction sound-emitting device 3, the bone conduction sound-emitting device 2 and the air conduction sound-emitting device 3 can be selectively utilized to emit sound, thereby increasing the diversity of the sound-emitting modes, and the respective sound-emitting characteristics of the bone conduction sound-emitting device 2 and the air conduction sound-emitting device 3 can be utilized to give full play to the performance advantages of the combination of bone conduction and air conduction and avoid their disadvantages, such as filtering out the frequency band with the largest vibration of the bone conduction vibration part to reduce the numbness, and at the same time utilizing the bass of the low-frequency part of the air conduction to enhance the sensitivity of the low frequency, etc. Of course, the above example is only one aspect, and those skilled in the art can make full use of the combined method to improve the sound quality in a diversified manner, improve the disadvantages of using a single sound-emitting unit independently, and thus improve the listening effect.

[0092] like Figure 1 As shown, in some embodiments, the overall mass of the headset (i.e., the mass of the entire device) ranges from 22g to 40g. If the headset is too heavy, wearing it for a long time may cause discomfort to the head and neck, and even cause headaches or neck fatigue. If the headset is too light, it may not be stable enough and may easily move or shake during use, affecting the listening experience. Limiting the overall mass to 22g to 40g is conducive to achieving a balance between comfort and stability to ensure a good user experience. The overall mass of the headset can be further selected as 26g to 35g, and further selected as 28 to 33g to further ensure the wearing experience.

[0093] Furthermore, the mass of a single sound unit 10 accounts for 0.13 to 0.27 of the mass of the entire device, so that the sound unit 10 has a more appropriate mass, and the weight of the earphone is evenly distributed, thereby improving the wearing comfort and stability. Further optionally, the mass of a single sound unit 10 is 4 to 7 g, and more preferably 5 to 6 g, so that the mass of the sound unit 10 is more appropriate, which is convenient for distributing the mass of the bone conduction sound device 2 and the air conduction sound device 3.

[0094] In some embodiments, the ratio of the total mass of the two sound units 10 to the total mass of the two functional compartments (control compartment 112 and battery compartment 113) and the rear hanger 110 is 0.7 to 1.3. In this way, the mass of the two sound units 10 is close to the total mass of the functional compartment and the rear hanger 110, so that the mass before and after the ear is more balanced and consistent, thereby improving the comfort and stability of wearing. The stable wearing of the sound unit 10 reduces the energy leakage of vibration during the conduction process, especially the energy leakage in the low frequency band, so that the vibration can be more effectively transmitted to the skull, thereby enhancing the low-frequency perception. Further optionally, the ratio of the total mass of the two sound units 10 to the total mass of the two functional compartments and the rear hanger 110 is 0.8 to 1.2, so as to further balance the mass before and after the ear, which is conducive to reducing the wearing stability affected by the swing of the rear hanger when wearing the earphones for exercise, thereby effectively reducing the displacement of the earphones caused by unstable wearing, keeping the sound unit 10 in the best position, reducing sound distortion and reflection, and improving the clarity of the audio and the sense of positioning of the sound field.

[0095] Figures 6 to 8a 1 is a schematic diagram of the structure of a sound unit 10 according to some embodiments of the present specification, and the sound unit 10 includes a housing assembly 100 and a bone conduction sound device 2 and an air conduction sound device 3 both of which are arranged in the housing assembly 100. The bone conduction sound device 2 is connected to a face cover 1001, and its vibration is transmitted to the human body through the face cover 1001. The air conduction sound device 3 is arranged on one side of the bone conduction sound device 2. In other embodiments, the bone conduction sound device 2 can also be connected to a back cover 1002 or connected to both the face cover 1001 and the back cover 1002 at the same time, and the vibration is transmitted to the face cover 1001 through the housing 1000, and then the vibration is transmitted to the human body through the face cover 1001. The housing assembly 100 is provided with a sound outlet 1003 connecting the inside and the outside, and the air conduction sound device 3 emits sound outward through the sound outlet 1003, and has a diaphragm 321 for vibrating and emitting sound, and optionally, the diaphragm 321 is arranged opposite to 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 their respective advantageous frequency bands can be utilized to achieve better auditory effects.

[0096] In some embodiments, the air conduction sound device 3 is located on one side of the width direction of the bone conduction sound device 2, 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, so that the arrangement of the air conduction sound device 3 and the bone conduction sound device 2 is more reasonable, the structure is more compact, space is saved and the weight distribution is optimized, which is conducive to controlling the mass and volume of the sound unit 10 within a smaller range. The sound unit 10 can have a suitable shape and volume, will not be too long to cause discomfort when worn, and is conducive to the air conduction sound device 3 close to the ear to sound, while the bone conduction sound device 2 is located on the side away from the ear when worn, when the angle β1 formed between the side surface 1123 and the contact surface 10010 toward the side where the head is located 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 promoting 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 direction of the housing assembly 100 are consistent with the length, width and thickness direction of the sound unit 10 .

[0097] like Figure 8a and Figure 8c As shown, the sound unit 10 has a middle surface 10a perpendicular to the width direction Y. The middle surface 10a can be determined as follows: the sound unit 10 is cut through a cutting plane perpendicular to the length direction X of the sound unit 10 to obtain a cross section (for example Figure 8a The cross section shown in FIG. 1 is a cross section of the bone conduction sound emitting device 2, and the cross section passes through the central axis of the bone conduction sound emitting device 2. A section line 10b perpendicular to the thickness direction Z of the sound emitting unit 10 is made at half of the thickness direction Z of the cross section. The middle surface 10a is a surface passing through the midpoint of the section line 10b and perpendicular to the section line 10b. The center of gravity O4 of the bone conduction sound emitting device 2 and the center of gravity O5 of the air conduction sound emitting device 3 are respectively located on both sides of the middle surface 10a, so that the center of gravity of the two is more balanced, which is conducive to the combined center of gravity of the two being close to the position of the middle surface 10a, and then the center of gravity of the sound emitting unit 10 as a whole is close to the middle surface 10a, so that the center of gravity of the sound emitting unit 10 is more centered, ensuring the balance of the device when worn, and avoiding discomfort or instability caused by the center of gravity shift.

[0098] When the sound-generating device (including the bone conduction sound-generating device 2 and the air conduction sound-generating device 3) is symmetrical as a whole (for example, centrally symmetrical and / or axially symmetrical) or approximately symmetrical, the center of gravity of the sound-generating device can be understood as being located at the geometric center of the sound-generating device, or as being located at the midpoint of the length, width, and height / thickness directions of the sound-generating device.

[0099] In some embodiments, the distance D16 between the center of gravity O4 of the bone conduction sound device 2 and the middle surface 10a is smaller than the distance D17 between the center of gravity O5 of the air conduction sound device 3 and the middle surface 10a. This is conducive to the vibration of the bone conduction sound device 2 being close to the middle area of ​​the face cover 1001, thereby improving the comfort of use. At the same time, the middle area is usually more closely attached to the facial skin, which is conducive to improving the sound transmission efficiency, thereby increasing the loudness and volume of the bone conduction sound, and at the same time, it can transmit more sound details, thereby improving the sound quality. In addition, the air conduction sound device 3 is farther away from the middle surface 10a, which is conducive to making the air conduction sound device 3 closer to the ear canal of the human ear. It can be understood that the closer the air conduction sound device 3 is to the ear canal of the human ear, that is, the closer the sound source is to the eardrum, the sound transmission efficiency of the air conduction sound can be significantly improved, and the energy loss of the sound wave in the atmosphere can be reduced, thereby increasing the sound pressure level and volume of the air conduction sound, especially the overall listening details can be improved, and the ear can hear richer sound elements. With the characteristics of solid sound transmission of the bone conduction sound unit, the air conduction and bone conduction can be linked to each other to transmit the sound to the auditory nerve of the brain at the same time, thereby significantly improving the overall sound quality and details of the earphone, making the sound closer to the quality of the sound source, with lower distortion and better sound restoration. Further, the mass of the bone conduction sound device 2 is greater than the mass of the air conduction sound device 3, which is conducive to the combined center of gravity of the two being closer to the middle surface 10a.

[0100] Further optionally, the ratio of the mass of the bone conduction sound-generating device 2 to the mass of the air conduction sound-generating device 3 is 2 to 6, and the ratio of the distance D17 to the distance D16 is 2 to 6. It can be understood that the bone conduction sound-generating device 2 mainly transmits sound through vibration, and the vibration generated by it is an effective vibration. The air conduction sound-generating device 3 mainly transmits sound through air, and the vibration transmitted to the human skin is an invalid vibration. The larger the mass ratio, the larger the ratio of the distance D17 to the distance D16 can be. In this way, the distance between the center of gravity of the bone conduction sound-generating device 2 and the middle surface 10a is shorter, which is conducive to sound transmission through the middle area of ​​the face cover 1001, improving the sound effect, and reducing Because the bone conduction sound device 2 is offset to one side of the face cover 1001, which causes the uncomfortable vibration, the air conduction sound device 3 is offset relative to the middle area of ​​the face cover 1001, so that the vibration transmitted to the human skin by the air conduction sound device 3 increases due to the longer transmission path, thereby reducing the vibration generated by the vibration of the air conduction sound device 3 and further improving the user experience. However, if the mass ratio is too large, the sound effect of the air conduction sound device 3 may be affected due to the decrease in mass of the air conduction sound device 3, and the mass and volume of the sound unit 10 may be increased due to the increase in mass and volume of the bone conduction sound device 2, thereby affecting the wearing experience. Furthermore, if the mass ratio is too small, it is not conducive to improving the overall performance. For example, in one case, the mass of the bone conduction sound device 2 remains unchanged, so the mass of the air conduction sound device 3 needs to be increased. Because the density of the air conduction sound device 3 is relatively low, it means that the volume of the air conduction sound device 3 will increase a lot, which will cause the volume of the sound unit 10 to increase synchronously, increase the weight of the earphone head, and significantly increase the sense of weight when the user wears it. At the same time, due to the increase in the system vibration mass, the high-frequency sound pressure level will be significantly attenuated, the volume will be weakened in the high-frequency band, and many sound details will be lost, resulting in a deterioration of the overall subjective and objective listening effect, thereby affecting the user experience. In another case, the mass of the air conduction sound device 3 remains unchanged, so the mass of the bone conduction sound device 2 needs to be reduced. Because the product density of the bone conduction sound device 2 is relatively large, it is necessary to reduce the volume of the bone conduction sound device 2. In general, the volume of the bone conduction sound device 2 is proportional to its performance, that is, the smaller the volume, the worse the performance, and conversely, the larger the volume, the better the performance. The main reason is that when the volume is larger, for example, one of the measures taken is to make the magnetic circuit component larger. The larger the magnetic circuit component, the greater its driving force, and the sound pressure level of the entire frequency band will be significantly improved, which will eventually be reflected in the improvement of performance. Of course, the above-mentioned measures are only one, and those skilled in the art can improve the performance by increasing the coupling space between the voice coil and the magnetic circuit, adopting a more stable spring design to prevent rolling vibration, increasing the number of turns and length of the voice coil, etc., and vice versa. The opposite result will be achieved. Therefore, the ratio of the mass of the bone conduction sound-generating device 2 to the mass of the air conduction sound-generating device 3 is 2 to 6, and the ratio of the distance D17 to the distance D16 is 2 to 6, so that the sound unit 10 can achieve a better comprehensive sound effect.

[0101] Further optionally, the ratio of the distance D17 to the distance D16 is M, the ratio of the mass of the bone conduction sound emitting device 2 to the mass of the air conduction sound emitting device 3 is N, and the ratio of M to N is 0.7 to 1.3, so as to ensure that the combined center of gravity of the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 can be close to the middle surface 10a or be located on the middle surface 10a, and be closer to the middle surface 10a, thereby further ensuring the sound effect and user experience.

[0102] Optionally, the air conduction sound emitting device 3 is entirely located on one side of the middle surface 10a, and the bone conduction sound emitting device 2 passes through the middle surface 10a and is divided by the middle surface 10a into two parts located on both sides of the middle surface 10a.

[0103] The air conduction sound device 3 and the bone conduction sound device 2 are in the shape of long strips, and their length is greater than their 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 may be rounded, right angles, chamfered angles or other transitional connection shapes of the long side and the short side, such as curves, etc.) 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 be at an angle of no more than 30°) to increase the volume of the bone conduction sound device 2, increase its sound pressure level and reduce distortion, and improve its sound effect. Further optionally, the bone conduction sound device 2 is consistent with the length direction of the sound unit 10 along the length direction of the sound unit 10. Further optionally, the housing assembly 100 has a substantially rectangular cavity, so that it is smaller in volume and has a higher internal space utilization rate while achieving the desired performance. Further optionally, the bone conduction sound device 2 and the air conduction sound device 3 are in the shape of a rectangular block as a whole, and the outer contour of their cross-section is roughly rectangular, so as to make fuller use of the space inside the shell assembly 100, so that the structure of the entire sound unit 10 is more compact, and the volume of the sound unit 10 is minimized 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 device 2 and the air conduction sound device 3 in the earphone head.

[0104] Optionally, the ratio of the length to the width of the bone conduction sound-generating device 2 is 1.3 to 3, so that the sound-generating unit 10 has sufficient vibration transmission area and space in the length direction. If the length is appropriately lengthened, the space inside the earphone head can be fully utilized to improve the acoustic performance. For example, when the length increases, the volume will increase synchronously. At this time, the sensitivity can be improved by increasing the volume of the magnetic circuit component, and the F0 of the bone conduction sound-generating device 2 can be reduced by increasing the length of the elastic arm of the shrapnel. Personnel in this field can flexibly make corresponding technical adjustments according to specific product requirements, including but not limited to the above means. When the aspect ratio is too small, the volume of the bone conduction sound-generating device 2 will decrease. As mentioned above, the volume and performance of the bone conduction sound-generating device 2 are positively correlated. The smaller the volume, the worse the performance is usually, so it is necessary to set a lower limit to ensure the performance of the bone conduction sound-generating device 2. In addition, a design that is too narrow and long may lead to uneven vibration modes, causing unstable vibration, rolling vibration or increased distortion. The consequence is that the magnetic circuit component may hit the coil during vibration, causing noise, or the distortion may be large due to the large swing amplitude, causing the sound restoration to deteriorate, thereby affecting the accuracy and clarity of the sound quality. In addition, an excessively long aspect ratio may weaken the stability of the structure of the bone conduction sound-generating device 2, thereby affecting the durability and reliability of the device. Setting the aspect ratio to 1.3 to 3 is conducive to balancing the aspect ratio of the bone conduction sound-generating device 2, ensuring that while providing good acoustic performance, it has good structural stability, vibration transmission efficiency and sound quality. Furthermore, the ratio of the length to width of the bone conduction sound-generating device 2 is 1.6 to 2, so as to further balance the aspect ratio and ensure the sound quality and effect of the output sound.

[0105] Optionally, the ratio of the length to the width of the air conduction sound device 3 is 1.3 to 3, and the air conduction sound device 3 is arranged along the length direction of the sound unit 10 (for example, the length direction of the air conduction sound device 3 can be consistent with the projection of the length direction of the sound unit 10 on the XY plane, or the two are at an angle not greater than 30°), which is conducive to making full use of the space in the length direction of the air conduction sound device 3 and increasing the effective radiation area of ​​the diaphragm 321. However, the aspect ratio is too large, similar to the excessive aspect ratio of the bone conduction sound device 2. The diaphragm 321 of the air conduction sound device 3 is prone to swing when vibrating, resulting in a decrease in distorted sound quality or the air conduction coil touching the air conduction magnetic circuit component to cause noise, etc. Similarly, similar to the aspect ratio of the bone conduction sound device 2, it is necessary to set a lower limit, and the aspect ratio of the air conduction sound device 3 cannot be too small to ensure the performance of the air conduction sound device 3. Setting the aspect ratio to 1.3 to 3 is conducive to making full use of the space while having good structural stability, vibration transmission efficiency and sound quality. Furthermore, the ratio of the length to the width of the air conduction sound device 3 is 1.6 to 2 to further balance the aspect ratio and ensure its good structure and acoustic output effect. Setting the bone conduction sound device 2 and the air conduction sound device 3 to be long strips, and setting the air conduction sound device 3 to be located on one side of the width direction of the bone conduction sound device 2 is conducive to making the structural arrangement more compact, thereby making full use of the internal space of the housing assembly 100 and increasing the vibration transmission area of ​​the bone conduction sound device 2. For example, Figure 6 In the illustrated embodiment, if the bone conduction sound emitting device 2 is set to be cylindrical, its volume will be smaller than that when it is set to be long strip shape when the internal space of the housing assembly 100 remains unchanged. It can be understood that when the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 are set to be rectangular or close to rectangular, a better space utilization effect can be achieved. In other embodiments, the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 can all or one of them be set to be cylindrical. In other embodiments, the bone conduction sound emitting device 2 and / or the air conduction sound emitting device 3 can also be a polygonal column.

[0106] In this specification, unless otherwise specified, the rectangular parallelepiped bone conduction sound generating device 2 and the air conduction sound generating device 3 are used as examples for description. It is to be understood that the rectangular parallelepiped is used as an example for description, which does not mean that the bone conduction sound generating device 2 and the air conduction sound generating device 3 must be rectangular parallelepiped, and the outer contour of the cross section can also be a racetrack shape, a cylinder, an ellipse or a polygon.

[0107] In this application, the distinction standards of each frequency band are as follows: low frequency band is 20~250Hz, medium-low frequency is 250Hz~500Hz, medium frequency band is 500~2000Hz, medium-high frequency is 2000~5000Hz, and high frequency band is 5000~20000Hz.

[0108] Next, the vibration directions and sound outlets of the bone conduction sound generating device 2 and the air conduction sound generating device 3 are described with examples.

[0109] 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 In the figure, "+" and "-" are used to indicate the positive direction and the negative direction respectively. The positive direction of the vibration direction A is upward and the negative direction is downward. The positive direction of the vibration direction B is leftward and the negative direction is rightward. Optionally, the angle α1 between the vibration direction A and the contact surface 10010 is 60° to 90°. Further optionally, the angle α1 between the vibration direction A and the contact surface 10010 is 75° to 90°. Further optionally, the angle α1 between the vibration direction A and the contact surface 10010 is 90°. As described above, when the contact surface 10010 is a plane, the angle α1 between a certain object (for example, the vibration direction A) and the contact surface 10010 is the angle between the object and the plane where the contact surface 10010 is located. When the contact surface 10010 is an arc surface, the most convex point or the most concave point of the arc surface has a tangent plane 10011. At this time, the angle α1 between a certain object and the contact surface 10010 can be understood as the angle between the vibration direction A and the tangent plane 10011. Setting the angle α1 to be greater than 60° can reduce the component of the vibration parallel to the face, so that the vibration of the bone conduction sound generating device 2 is better transmitted to the skull, reducing the loss of vibration.

[0110] 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 coincident with the vibration direction A of the bone conduction sound emitting device 2, or 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, 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, refer to 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.

[0111] 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.

[0112] refer to Figure 4 and Figure 6 When 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 1004, and the sound outlet 1003 is opened on the proximal end 10040, so that the air conduction sound emitting device 3 can be close to the human ear and emit sound toward the human ear, which is helpful for the directness and clarity of the sound, reduces the loss and distortion of the sound, and enables people to hear louder air conduction 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 hole 1003 is opened on the end surface of the side shell portion 1004 of the outer shell assembly 100 facing the functional compartment.

[0113] In some embodiments, reference Fig. 9 , the angle α2 between the vibration direction B of the air conduction sound-generating device 3 and the contact surface 10010 is 0-45°. Setting the angle α2 between the vibration direction B and the contact surface 10010 to 0-45° can make the sound emitted by the air conduction sound-generating device 3 better directed to the ear canal, improve the sound propagation efficiency, and reduce sound leakage. Further optionally, the angle α2 is 0-30°, and further, the angle α2 is 0-15°, so that the sound emitted by the air conduction sound-generating device 3 can be more accurately directed to the ear canal. When the angle α2 is greater than 0°, the positive direction of the vibration direction B of the air conduction sound-generating 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-generating device 2. Optionally, when the head-mounted sound-generating 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.

[0114] 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. Fig. 9In the illustrated embodiment, both are connected to the face cover 1001 and the side shell 1004 respectively through a connecting piece 12, and the surface of the connecting piece 12 connected to the sound device is inclined, so the bone conduction sound device 2 and the air conduction sound device 3 are also inclined accordingly after installation. In other embodiments, the connecting piece 12 may not be provided, and inclined surfaces are provided on the face cover 1001 and the side shell 1004, and the bone conduction sound device 2 and the air conduction sound device 3 are respectively installed on the corresponding inclined surfaces to adjust the angle.

[0115] 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 the 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.

[0116] 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 degree, 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 outlet 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°.

[0117] In some embodiments, the axial direction C of the sound outlet 1003 is consistent 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. At this time, the angles between the axial direction C and the vibration direction B and the contact surface 10010 are the same, which can further improve the efficiency of sound propagation. In some embodiments, the axial direction C of the sound outlet 1003 is parallel to the contact surface 10010, and the vibration direction B of the air conduction sound 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 vertical it is to the depth direction of the shell 1000 and the cover 1001, which is more conducive to utilizing the space inside the housing assembly 100, and preventing the occupied space from increasing 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 make the center of the diaphragm closer to the sound outlet 1003. The shorter the sound wave propagation path, the higher the sound pressure level received by the human ear, and the air conduction sound device 3 can output a higher volume at the same power. Therefore, the angle α3 is greater than the angle α2, which is conducive to the miniaturization of the sound unit, or when the volume remains unchanged, the volume of the bone conduction sound device 2 and / or the air conduction sound device 3 is increased, thereby improving the sound effect. Optionally, the vibration direction A is perpendicular to the contact surface 10010, the vibration direction B is parallel to the contact surface 10010, and the air conduction sound device 3 adjusts the direction of the sound emitted from the sound outlet hole 1003 through the sound outlet hole 1003.

[0118] It is understandable that the axial direction C of the sound outlet 1003 can be adjusted in a variety of ways, for example, Fig. 9 In the illustrated embodiment, the sound outlet hole 1003 is obliquely arranged on the side shell portion 1004, and the axial direction C of the sound outlet hole 1003 is changed by the inclination of the side shell portion 1004 relative to the side shell portion 1004. For another example, the side shell portion 1004 can be arranged to be obliquely arranged relative to the contact surface 10010, and the sound outlet hole 1003 is vertically arranged on the side shell portion 1004, and the axial direction C of the sound outlet hole 1003 is changed by the inclination of the side shell portion 1004 relative to the contact surface 10010.

[0119] The number of the sound outlet holes 1003 may be one or more, for example, one, two, three or more. In some embodiments, the geometric center O1 of the projection of the outer contour of at least one sound outlet hole 1003 on the inner wall of the side shell portion 1004 along the vibration direction B on a plane perpendicular to the vibration direction B coincides with the geometric center O2 of the projection of the diaphragm 321 of the air conduction sound generating device 3 along the vibration direction B on the same plane. In other embodiments, Fig.10 The number of the sound outlet hole 1003 is one, and the geometric center O1 of the outer contour of the sound outlet hole 1003 on the inner wall of the side shell portion 1004 projected along the vibration direction B does not coincide with the geometric center O2 of the diaphragm 321 of the air conduction sound generating device 3 projected along the vibration direction B. Fig.10The outer contour of the diaphragm 321 is shown by a dotted line. When the sound outlet hole 1003 is concentrically arranged with the diaphragm 321, the resonance effect will be aggravated. The concentricity of the sound outlet hole 1003 and the diaphragm 321 may cause resonance in the acoustic cavity, especially at higher frequencies. This may lead to resonance peaks and attenuation valleys at some frequencies, affecting the naturalness and quality of the sound. Setting the sound outlet hole 1003 to be offset relative to the diaphragm 321, for example, setting it at the edge of the diaphragm 321 or other positions can avoid or alleviate this situation, maintain the normal vibration of the diaphragm 321, and improve the accuracy and clarity of the sound.

[0120] Optionally, the geometric center O1 of the sound outlet 1003 is offset toward the ear canal relative to the geometric center O2, making it closer to the ear canal, which is beneficial to increase the loudness and reduce the diffusion of sound to the space outside the head, thereby reducing sound leakage. Fig.10 In some embodiments, the geometric center O1 of the sound hole 1003 is biased toward one side of the face cover 1001 relative to the geometric center O2 so as to be close to the ear canal. In some embodiments, the geometric center O1 of the sound hole 1003 is biased toward the connection 111a between the housing assembly 100 and the ear hook 111 relative to the geometric center O2 so as to make the sound hole 1003 close to the ear canal. In other embodiments, the geometric center O2 of the diaphragm 321 is biased toward both the face cover 1001 and the connection 111a. Optionally, the distance D8 between the geometric center O2 of the diaphragm 321 and the geometric center O1 of the sound hole 1003 is 0.1 to 8 mm to obtain a better sound effect and ensure the structural strength of the shell. The distance D8 between the geometric center O2 of the diaphragm 321 and the geometric center O1 of the sound hole 1003 can be further selected to be 1 to 4 mm to further ensure the effect.

[0121] The number of the sound outlet holes 1003 can be one or more. In some embodiments, the total area of ​​all the sound outlet holes 1003 is 10-130 mm. 2 The total area of ​​the sound outlet 1003 is large, which can make the sound emitted by the diaphragm 321 spread out better, and can also shift the high-frequency cutoff frequency of the air-conducting sound-generating device 3 backward, thereby improving the sensitivity of the mid-high frequency. When the sound outlet 1003 is larger than 130mm 2 Further increasing the area of ​​the sound outlet 1003 has little effect on the shift of the high-frequency cutoff frequency, and a too large sound outlet 1003 may easily lead to insufficient shell strength. Therefore, the area of ​​the sound outlet 1003 can be selected to be 10 to 130 mm 2 . Fig.11The frequency response curve of the sound unit with sound outlet holes 1003 of different areas obtained by simulation is shown. During the simulation, the air conduction sound-emitting device 3 emits sound, and the bone conduction sound-emitting device 2 does not emit sound. Except for the change in the area of ​​the sound outlet hole 1003, other parameters remain unchanged. It can be seen from the figure that as the area of ​​the sound outlet hole 1003 increases, the high-frequency cutoff frequency also increases, the frequency band before the high-frequency cutoff frequency also becomes flatter, and the attenuation of the frequency response of the frequency band after the high-frequency cutoff frequency also becomes smaller, so that the bandwidth at the frequency response curve of the air conduction part of the entire device is also wider. The bandwidth refers to the difference between the frequency value corresponding to the high-frequency cutoff frequency and the frequency value corresponding to the resonance peak at F0. Generally speaking, the wider the bandwidth, the better the sound quality, and it can also effectively improve the sensitivity of the mid-high frequency band and increase the volume of air conduction. Because the bandwidth is wider, the sound details at high frequencies are more delicate. For example, when playing music symphonies or high-fidelity vocal music, the high notes of violins and pianos are clear and textured and can be distinguished by the human ear. The breath or unique voice details of human singing will also be presented. At the same time, because the sound restoration is high and clear, the distortion is greatly reduced. The overall subjective listening will appear to be richer and warmer, which is of great help to improve the overall sound quality. Therefore, the area of ​​the sound outlet 1003 is set to 10-130mm 2 , which is conducive to making the air conduction sound-generating device 3 have a better frequency response curve and improving the sound-generating effect. Further optionally, the total area of ​​all the sound outlet holes 1003 is 40 to 100 mm 2 , while ensuring the sensitivity of mid- and high-frequency, the structural strength of the shell is further guaranteed.

[0122] Optionally, the number of the sound outlet hole 1003 is one, so as to reduce the obstruction of the solid part between the multiple sound outlet holes 1003 to the sound waves, so that the sound can be transmitted more efficiently.

[0123] Optionally, at least one sound outlet 1003 is in the shape of an elongated strip and is arranged in a direction parallel to the contact surface 10010 or the angle between the two directions is not more than 15°, which can reduce the diffusion of sound to the space outside the head, thereby reducing sound leakage. At the same time, the length direction of the air-conducting sound-emitting device 3 is arranged along the width direction Y of the sound-emitting unit 10, so that the extension direction of the sound outlet 1003 is closer to or consistent with the length direction of the diaphragm 321, which is conducive to the propagation of sound waves. Further optionally, the width W4 of the sound outlet 1003 is 0.8 to 8 mm, and the length L11 is 3 to 15 mm. Further optionally, two or more sound outlets 1003 are arranged along the length direction of the sound outlet 1003 to further reduce sound leakage and improve the efficiency of sound propagation.

[0124] In some embodiments, reference Fig. 9, the vibration direction A of the bone conduction sound device 2 is tilted relative to the contact surface 10010, and the positive direction of the vibration direction A points to the direction away from the air conduction sound device 3, and the positive direction of the vibration direction B of the air conduction sound device 3 points to the direction away from the bone conduction sound device 2, and the vibration direction B can be tilted or parallel to the contact surface 10010. When the bone conduction sound device 2 and the air conduction sound device 3 are working, the vibrating parts therein (i.e., the vibrator of the bone conduction sound device 2 and the diaphragm assembly 32 of the air conduction sound device 3) will generate a certain vibration force. Since the vibration force is not completely perpendicular to the contact surface 10010, a component force parallel to the contact surface 10010 will be generated, which not only affects the comfort, but also may cause the earphone head to be worn to move in a direction parallel to the contact surface 10010. The positive direction of the vibration direction A of the bone conduction sound device 2 is directed away from the direction where the air conduction sound device 3 is located, and the positive direction of the vibration direction A of the air conduction sound device 3 is directed away from the direction where the bone conduction sound device 2 is located, so that the component force parallel to the contact surface 10010 generated when the bone conduction sound device 2 and the air conduction sound device 3 vibrate positively or negatively at the same time can at least partially offset each other, thereby reducing or even eliminating the vibration in the direction parallel to the contact surface 10010, and improving the wearing comfort and stability. The mass of the vibrator 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 further optionally 1, to further ensure the wearing comfort and stability, where "*" refers to the multiplication sign.

[0125] In some embodiments, 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 head, the thicker the thickness of the bone conduction sound-generating device 2 is, 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 is, and the driving force of the magnetic field provided in the end is also greater, so that a greater vibration amount can be provided, that is, the sensitivity of the bone conduction sound-generating device 2 is improved. Setting the thickness of the bone conduction sound-generating device 2 to 5 mm to 6.5 mm is conducive to obtaining a good loudness effect and will not cause the thickness of the earphone head to be too large. Further, the thickness D1 of the bone conduction sound-generating device 2 is 5.5 mm to 6 mm to make its size more suitable.

[0126] The thickness D2 of the air conduction sound generating device 3 can be selected to be 1.5 mm to 3 mm. The thickness D2 of the air conduction sound generating device 3 refers to the thickness D2 of the middle sheet 3211 from the bottom surface 3b to the diaphragm 321 (see reference numerals). Fig.33 and Fig.40), when the air conduction sound generating device 3 includes a reinforcing sheet 3213, refer to Fig. 27 and Fig.32 , 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 reinforcing sheet 3213. An air conduction sound-generating device 3 that is too thin may limit the vibration range of the diaphragm. At the same time, due to the thickness limitation, the thickness of the magnetic circuit assembly cannot be the ideal thickness. On the one hand, the magnet in the magnetic circuit assembly is too thin and is not easy to manufacture. For example, it may break during the manufacturing process, resulting in a decrease in the yield rate and increased costs. On the other hand, because the magnet is too thin, the magnetic flux B value will decrease, which will eventually affect the driving force of the air conduction sound-generating device 3, resulting in a decrease in sensitivity, causing the user's subjective and objective listening volume to decrease, and ultimately affecting the performance and sound quality of the sound. Overly thick components may increase resonance or cause other sound distortions. At the same time, overly thick products lead to large product volumes, which will make the earphone head bulky and increase in mass, resulting in a decrease in user wearing comfort. Because of the increase in mass, it will further affect the synchronous increase in the vibration mass of the bone conduction sound-generating unit system, which will reduce the sensitivity of the mid- and high-frequency bands and the loss of details in sound transmission, thereby causing a decrease in sound quality. Within the aforementioned thickness value range, the air conduction sound device 3 can provide good sound quality, and the length it occupies is short, which is conducive to the arrangement of the bone conduction sound device 2, so that the overall width of the earphone head is not too large, and the quality of the earphone head is controlled within a reasonable range, which can provide sufficient driving force and take into account the user's listening quality. Further, the thickness D2 of the air conduction sound device 3 is 2mm to 2.8mm, so that its size is more suitable.

[0127] 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. Optionally, the ratio of the thickness D1 of the bone conduction sound generating device 2 to the thickness D2 of the air conduction sound generating 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 a suitable space to set 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 to increase its sound pressure level, and then improve the sound effect of the sound unit 10; on the other hand, making the air conduction sound-generating device 3 thinner can reduce the occupation of the internal space of the outer shell component 100 by the air conduction sound-generating device 3. When it is set close to the side shell portion 1004, more space can be reserved 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.

[0128] Next, the connection structure between the air conduction sound generating device 3 and the housing assembly 100 and the related features of the front cavity are illustrated.

[0129] In some embodiments, the sound unit 10 further includes a front cavity 10042 and a rear cavity 10044, and the front cavity 10042 and the rear cavity 10044 are separated by the diaphragm 321 of the air conduction sound device 3, that is, the side of the diaphragm 321 facing the outside of the housing assembly 100 is the front cavity, and the side of the diaphragm 321 facing the inside of the housing assembly 100 is the rear cavity. The front cavity 10042 is connected to the sound outlet 1003 to emit sound outward. By setting the front cavity 10042, it is beneficial to make the sound generated by the vibration of the diaphragm 321 concentratedly emitted through the front cavity 10042 and the sound outlet 1003, thereby improving the sound transmission efficiency and reducing the volume loss, and then a smaller volume of the air conduction sound device 3 can be used, which is beneficial to the miniaturization of the sound unit 10. At the same time, it is beneficial to improve the high-frequency sensitivity. It can be understood that the inside and outside of the air conduction sound device 3 are connected so that the air flow can flow smoothly and balance the internal and external air pressures of the air conduction sound device 3. Optionally, the air conduction sound generating device 3 is provided with at least one vent hole 3c connecting the inside and the outside thereof, and 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 FIG. 3 shows a case where a vent hole 3c is provided on the magnetic conductive bottom plate 3100. In some cases, sound can be emitted to the outside through the vent hole 3c, for example, referring to FIG. Figure 8b When the bottom surface 3b of the air conduction sound-generating device 3 is arranged toward the sound outlet hole 1003, sound can be emitted outward through the vent hole 3c.

[0130] Optionally, the outer contour of the cross section of the air conduction 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 conduction sound-generating device 3 perpendicular to the vibration direction B can be made larger, thereby enabling the air conduction sound-generating device 3 to increase its volume without excessively increasing its thickness to ensure the sound effect, and also enabling the diaphragm 321 to have a larger area, which is beneficial to increase the volume and enhance the low-frequency effect.

[0131] Fig.12 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 is 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 3The smaller front cavity 10042 helps to extend the resonance frequency of the front cavity to high frequencies, preventing the high-frequency cutoff frequency from being too far forward, resulting in low high-frequency sensitivity, thereby improving the sound effect. However, if the front cavity 10042 is too small, it will affect the normal operation of the diaphragm 321, for example, it may cause the diaphragm 321 to contact the shell and produce noise. In order to make the front cavity 10042 provide sufficient vibration space for the diaphragm 321 and ensure that the high-frequency cutoff frequency is far back, the volume of the front cavity 10042 can be further selected to be 50-200mm 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.

[0132] In some embodiments, the bone conduction sound generating device 2 and the air conduction sound generating device 3 are located in the same cavity of the housing component 100, so that the housing component 100 has a larger rear cavity 10044. Figure 8a The housing 1000 is provided with a through hole 10000 connecting 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 1004. The through hole 10000 is connected to the rear cavity 10044, which is conducive to increasing the rear cavity 10044 of the air conduction sound-generating device 3, thereby reducing F0 and improving low-frequency sensitivity. In other embodiments, the bone conduction sound-generating device 2 and the air conduction sound-generating device 3 may be respectively provided 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 communicating with the outside world. The parameters of the through hole 10000 may refer to the 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.

[0133] 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). Fig. 27 and Fig.32 ) and the like are connected to the inner wall. In other embodiments, in order to further reduce the occupation of the air conduction sound device 3 in the internal space of the housing assembly 100, the air conduction sound device 3 can be embedded in the side shell portion 1004 to reduce the occupation of the air conduction sound device 3 in the internal space of the housing assembly 100, thereby facilitating the miniaturization of the sound unit 10. In addition, the firmness of the connection between the air conduction sound device 3 and the side shell portion 1004 can also be improved. The air conduction sound 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 1004 is provided with a mounting groove 10041, and the air conduction sound device 3 is arranged in the mounting groove 10041. In the illustrated embodiment, the air conduction sound device 3 is partially located in the mounting groove 10041. In other embodiments, the air conduction sound device 3 may also be completely located in the mounting groove 10041. The mounting groove 10041 can not only save the space occupied by the air conduction sound device 3, but also play a role in positioning the air conduction sound device 3. Compared with the solution of attaching it to the inner wall of the side shell 1004, there is no need to set a limiting structure separately. Furthermore, the mounting groove 10041 makes the contact area between the air conduction sound device 3 and the housing assembly 100 relatively larger, and can also increase the firmness of the installation of the air conduction sound device 3. Optionally, the depth D14 of the mounting groove 10041 is 0.3 to 1.5 mm, and the air conduction sound emitting 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 installing the air conduction sound emitting device 3 is not too thick, which is beneficial to reducing the mass of the sound unit 10.

[0134] Optionally, the face cover 1001 is connected to the end face 1000a of the shell 1000, and one side of the mounting groove 10041 extends to the end face 1000a and has an opening facing the end face 1000a, that is, the mounting groove 10041 is connected to the end face 1000a. In this way, the air conduction sound-emitting device 3 can be installed directly downward from the end face 1000a, which is more convenient to install and can make more full use of the space in the thickness direction of the sound unit 10, which is beneficial to increase the volume of the air conduction sound-emitting device 3 and the effective radiation area of ​​the diaphragm 321, or reduce the volume of the sound unit 10. Figure 7 In the illustrated embodiment, the mounting groove 10041 is not connected to the back cover 1002, and the other side thereof is spaced apart from the back cover 1002. Further optionally, in other embodiments, the mounting groove 10041 is connected to the back cover 1002, that is, the other side of the mounting groove 10041 extends to the inner surface of the back cover 1002, so as to further improve space utilization and increase the available size of the air conduction sound emitting device 3 in the thickness direction of the sound emitting unit 10.

[0135] The air conduction sound emitting device 3 can be connected to the inner wall of the mounting groove 10041 and / or the back cover 1002 and / or the surface cover 1001 by adhesive bonding. When the air conduction sound emitting device 3 is connected to two or all of the mounting groove 10041, the back cover 1002 and the surface cover 1001, the firmness of the connection can be further ensured, and the reliability of the operation of the air conduction sound emitting device 3 can be ensured. Optionally, the air conduction sound emitting device 3 is connected to the groove bottom surface 10043 of the mounting groove 10041 by adhesive bonding, for example, by bonding by double-sided tape or gluing. For example, refer to Figure 8a, the outer edge of the diaphragm 321 of the air conduction sound-generating device 3 (such as the outer ring sheet 3210 mentioned below) is adhered to the bottom surface 10043 of the groove. In other embodiments, the air conduction sound-generating device 3 also includes a pressure cover 33 connected to the diaphragm 321. At this time, the pressure cover 33 can be adhered to the bottom surface 10043 of the groove. In other embodiments, the air conduction sound-generating device 3 can also be adhered to the bottom surface 10043 of the groove through its magnetic conductive bottom plate 3100. The air conduction sound-generating device 3 can also be adhered to the side wall of the installation groove 10041 and the face cover 1001 by glue, thereby improving the firmness of the connection. Optionally, when the air conduction sound-generating device 3 is installed in the installation groove 10041, it is flush with the end face 1000a of the housing 1000 facing the face cover 1001, so as to facilitate the installation of the face cover 1001 and adhere to the face cover 1001. Optionally, the air conduction sound-generating device 3 can also be adhered to the back cover 1002. In some embodiments, a cavity may be further provided on the cover 1001, and the air conduction sound generating device 3 may extend beyond the end surface 1000a and enter into the cavity, so as to increase the volume of the air conduction sound generating device 3 and improve space utilization.

[0136] refer to Figure 7 and Figure 8a The side shell portion 1004 of the housing 1000 is provided with the front cavity 10042, the front cavity 10042 is connected to the mounting groove 10041 and the sound outlet hole 1003, the front cavity 10042 is arranged corresponding to the sound outlet surface (i.e., the diaphragm 321) of the air conduction sound emitting device 3, and extends from the groove bottom surface 10043 of the mounting groove 10041 toward the sound outlet hole 1003. It can be understood that the mounting groove 10041 is not necessary, for example, the mounting groove 10041 may not be provided, the front cavity 10042 is directly opened on the inner wall of the side shell portion 1004, and is connected to the sound outlet hole 1003, and the air conduction sound emitting device 3 is also directly connected to the inner wall of the side shell portion 1004.

[0137] Next, the bone conduction sound generating device 2 of the sound generating unit 10 is described by way of example.

[0138] First of all, it should be noted that the bone conduction sound generating device 2 and the air conduction sound generating device 3 include similar parts, such as a bracket, a magnetic circuit assembly, and a coil, etc. For the convenience of distinction, the corresponding parts of the bone conduction sound generating device 2 and the air conduction sound generating device 3 are respectively referred to as bone conduction parts or air conduction parts, for example, the bracket, magnetic circuit assembly, and coil of the bone conduction sound generating device 2 are respectively referred to as a bone conduction bracket, a bone conduction magnetic circuit assembly, and a bone conduction coil, and the bracket, magnetic circuit assembly, and coil of the air conduction sound generating device 3 are respectively referred to as an air conduction bracket, an air conduction magnetic circuit assembly, and an air conduction coil.

[0139] Fig.13a is a schematic diagram of the structure of a bone conduction sound generating device 2 according to some embodiments of this specification, Fig.13b yes Fig.13a The cross-sectional schematic diagram of the bone conduction sound generating device 2 is shown, Fig.142 is a cross-sectional schematic diagram of a bone conduction sound-generating device 2 of another embodiment. The bone conduction sound-generating device 2 includes a bone conduction support 20, a bone conduction magnetic circuit assembly 21, at least one bone conduction coil 22 and at least one spring 23. The bone conduction magnetic circuit assembly 21 and the bone conduction coil 22 are both arranged inside the bone conduction support 20, and 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 face 202 of the bone conduction support 20. The bone conduction coil 22 surrounds the outside of the bone conduction magnetic circuit assembly 21 and is relatively fixed to the bone conduction support 20, and is used to drive the bone conduction magnetic circuit assembly 21 to vibrate. The bone conduction magnetic circuit assembly 21 is connected to the bone conduction support 20 through the spring 23 and can be reset by the elastic force of the spring 23. The bone conduction sound-generating device 2 is connected to the face cover 1001 to transmit the vibration to the face cover 1001. For example, it can be connected to the face cover 1001 through the bone conduction support 20, the spring 23 or the connector 12. In this specification, the stator of the bone conduction sound generating device 2 refers to the part that does not move relative to the housing assembly 100 when the bone conduction sound generating device 2 is working, 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 working, including components such as the bone conduction magnetic circuit assembly 21 and the spring 23.

[0140] In some embodiments, the bone conduction support 20 is annular, with both ends open, and surrounds the outside of the bone conduction magnetic circuit component 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 to be installed in the housing component 100 with the air conduction sound generating device 3, and the space in the housing component 100 is more fully utilized. It is understandable that in other embodiments, the shape of the bone conduction support 20 can also be other shapes, such as a circular ring, a racetrack, etc. Fig.15 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.

[0141] In some embodiments, the bone magnetic circuit assembly 21 includes at least one magnet 210 and at least two magnetic conductive plates 211, and one magnet 210 is connected between two adjacent magnetic conductive plates 211. The N pole and S pole of the magnet 210 and the magnet 210 and the magnetic conductive plate 211 are arranged along the vibration direction A of the bone magnetic circuit assembly 21. When the number of magnets 210 is greater than or equal to two, the polarities of the opposite magnetic poles of the two adjacent magnets 210 are the same (i.e., the same poles are opposite). An annular bone magnetic gap 24 is formed between the bone magnetic circuit assembly 21 and the bone conduction support 20, and a bone conduction coil 22 is surrounded by the outer surface of the magnetic conductive plate 211. The bone conduction coil 22 is located in the bone magnetic gap 24 between the bone conduction support 20 and the bone magnetic circuit assembly 21. When the bone conduction coil 22 is supplied with alternating current, 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 through the spring 23. At least one or all of the magnetic conductive plates 211 are surrounded by a bone conductive coil 22. When all of the magnetic conductive plates 211 are surrounded by a bone conductive coil 22, the number of the bone conductive coils 22 corresponds to the number of the magnetic conductive plates 211. Optionally, at least two of the magnetic conductive plates 211 are surrounded by a bone conductive coil 22 to increase the driving force of the bone conductive coil 22 and improve the volume. In other embodiments, only one of the magnetic conductive plates 211 may be surrounded by a bone conductive coil 22.

[0142] Fig.13b , Fig.16a , Fig.17a , Fig.18a , Fig.19a as well as Fig.24a A schematic structural diagram of a bone magnetic circuit assembly 21 according to some embodiments of the present specification is shown.

[0143] Fig.13b , Fig.16a and Fig.24a 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. Fig.13b , Fig.16a and Fig.24a The difference between the structures shown is that Fig.13b The magnetic conductive plate 211 shown is provided with a boss 2113 and a recess 2114. Fig.16a The magnetic conductive plate 211 shown is provided with a boss 2113, but no recess 2114 is provided. Fig.24a The magnetic conductive plate 211 is shown with a gasket 26 connected thereto.

[0144] Fig.17aIn 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, and a gasket 26 is connected to the magnetic conductive plate 211. Two adjacent magnets 210 are arranged with the same poles facing each other. The outside of the magnetic conductive plate 211 located between two adjacent magnets 210 is surrounded by a bone conductive coil 22. Compared with the structure of a single magnet, the structure of three magnets can increase sensitivity.

[0145] Fig.18a 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, and 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. The outer part of the magnetic conductive plate 211 located between the two adjacent magnets 210 is surrounded by a bone conductive coil 22. Since the outermost part of the bone magnetic circuit assembly 21 is the magnetic conductive plate 211, magnetic leakage can be reduced.

[0146] Fig.19a 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, and 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. The outer side of the magnetic conductive plate 211 located between the two adjacent magnets 210 is surrounded by a bone conductive coil 22. Since the outermost side of the bone magnetic circuit assembly 21 is the magnetic conductive plate 211, magnetic leakage can be reduced.

[0147] 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.

[0148] The bone conduction magnetic circuit components 21 mentioned above can be installed in the bone conduction sound generating device 2 and assembled into the sound generating unit 10, for example, Fig.14 and Figure 8c That is, respectively showing Fig.17a The bone conduction magnetic circuit assembly 21 shown is applied to the bone conduction sound emitting device 2 and the sound emitting unit 10 .

[0149] Next, the bone conduction support 20 of the bone conduction sound generating device 2 is described by way of example.

[0150] The bone conduction support 20 can be made of a magnetic 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+glass fiber. The bone conduction support 20 made of non-magnetic material can reduce the mass of the bone conduction sound-generating device 2 and reduce the mass of the stator of the bone conduction sound-generating device 2, thereby improving the sensitivity of the bone conduction sound-generating device 2 to medium and high frequencies. When the bone conduction support 20 is made of a magnetic material (such as magnetic stainless steel), the BL value (BL value is used to reflect electromagnetic characteristics, which refers to the product of magnetic field strength and coil wire length) can be increased, leakage magnetic flux can be reduced, and medium frequency sensitivity can be improved. Optionally, the tensile strength of the magnetic material used to make the magnetic bone conduction stent 20 is 430MPa-780Mpa, and further can be 450-600Mpa, the yield strength is greater than 200Mpa, the elongation is greater than 20%, the chemical composition contains iron greater than 50%, and contains chromium 15-20%, which is beneficial for the bone conduction stent 20 to have good strength and prevent fracture and deformation. The chromium content of the bone conduction stent 20 is beneficial for improving corrosion resistance, strength and hardness, high temperature performance, wear resistance and magnetic conductivity, and improving the effect of preventing magnetic leakage. Exemplarily, the material of the magnetic bone conduction stent 20 can be, for example, SUS430 and SUS304.

[0151] When the bone conduction sound generating device 2 includes two or more bone conduction coils 22, each bone conduction coil 22 is connected in series, and the current directions in two adjacent bone conduction coils 22 are opposite to each other, so as to reduce the inductance and improve the sensitivity of the medium and high frequencies. The current direction in the bone conduction coil 22 can be changed by changing the winding direction. Fig.13a and Fig.13b In the illustrated embodiment, the number of bone conduction coils 22 is two, and the two bone conduction coils 22 are arranged in series, and the current directions are opposite. The bone conduction sound generating device 2 also includes an external circuit board 25 attached to the outer surface of the bone conduction bracket 20. The external circuit board 25 can be a flexible circuit board. Optionally, the external circuit board 25 is arranged on the outer side wall 203 of the bone conduction bracket 20 facing the connection 111a of the ear hook 111 and the housing component 100, so as to facilitate connection with external wires (such as cables or wires mentioned below). Further, the wire outlet 201 and the external circuit board 25 are arranged on the same outer side wall 203, so as to facilitate welding the lead 220 of the bone conduction coil 22 on the external circuit board 25. It can be understood that the current direction in the bone conduction coil 22 can also be changed by changing the connection position of the lead of the coil with the pad on the external circuit board 25 and the circuit design on the external circuit board 25. In some embodiments, the external circuit board 25 and the wire outlet hole 201 are located at one end of the bone conduction support 20 in the length direction, and the wire outlet hole 201 is not adjacent to the diaphragm 321 .

[0152] Next, the spring piece 23 of the bone conduction sound generating device 2 is described with an example.

[0153] The number of the spring pieces 23 can be one, two or more. Fig.13a and Fig.13b As shown, the bone conduction sound generating device 2 includes two spring pieces 23, which are arranged at intervals along the vibration direction A. Optionally, the two spring pieces 23 are respectively arranged at the two 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 hitting the side parts. The spring piece 23 is in the shape of a sheet as a whole, and its thickness B2 is 0.1mm to 0.25mm, and can further be 0.13mm to 0.2mm. Fig.20a The spring piece 23 includes an outer frame 230, an inner frame 231 located inside the outer frame 230, and at least two elastic arms 232 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 piece 23 is attached to the end face 202 of the bone conduction support 20. The outer frame 230 and the bone conduction support 20 can be connected by gluing or welding. Exemplarily, the outer frame 230 and the end face 202 are connected by welding. The bonding strength of welding is better than that of bonding, so that the elastic coefficient of the spring piece 23 is more stable, which is beneficial to the stability of the low frequency F0 of the bone conduction sound generating device 2. The welding method can be, for example, spot welding or wire welding, preferably wire welding. Wire welding can reduce welding slag, thereby preventing welding slag from entering the product to generate noise, and the welding strength is stronger than spot welding or bonding, which is beneficial to enhance reliability.

[0154] In some embodiments, reference Fig.20a , the outer frame 230 is in a continuous ring shape. In other embodiments, the outer frame 230 is discontinuous, referring to Fig.21 , which may be in the form of a discontinuous ring (or discontinuous ring), or, Fig. 22 , which may only include a plurality of sheet portions 2303 connected to the elastic arms 232. By selecting the outer frame 230 in a continuous ring, a discontinuous ring or other forms, the mass of the spring sheet 23 can be adjusted, thereby adjusting the mass of the bone conduction sound generating device 2. In this specification, unless otherwise specified, the outer frame 230 in a continuous ring is taken as an example for description.

[0155] Optionally, the tensile strength of the material of the shrapnel 23 is 500MPa to 1600Mpa, and can be further selected as 900 to 1500Mpa. The yield strength of the shrapnel 23 is >200Mpa, and can be further selected as >800Mpa. When the shrapnel 23 is stainless steel, the material contains >50% iron and 15 to 20% chromium, which is conducive to improving corrosion resistance, strength and hardness, and improving high temperature performance and wear resistance. Exemplarily, the material of the shrapnel 23 is stainless steel, such as SUS301EH, SUS301H, SUS304H, etc., and the material of the shrapnel 23 can also be beryllium copper, etc. The mass of the shrapnel 23 can be, for example, 0.08 to 0.13g. Optionally, the shrapnel 23 is made of non-magnetic material.

[0156] Optionally, the Young's modulus of the spring piece 23 is 160-220 GPa to provide better rigidity, which can prevent the spring piece 23 from being easily deformed and improve reliability.

[0157] The spring piece 23 may include a plurality of elastic arms 232, and the plurality of elastic arms 232 are rotationally symmetrically arranged around the center of the inner frame 231. 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. Fig.20a The spring piece 23 shown includes two elastic arms 232 arranged symmetrically with respect to the center, and the elastic arm 232 of the spring piece 23 has an inner connecting portion 2320 connected to the inner frame 231 and an outer connecting portion 2321 connected to the outer frame 230. In the following, unless otherwise specified, the spring piece 23 with two elastic arms 232 is taken as an example for description.

[0158] Fig.20b According to this specification Fig.20a In the top view of the spring piece 23 of the illustrated embodiment, there are two elastic arms 232, and the outer connecting portion 2321 of the elastic arm 232 is connected to the long side 2300 of the outer frame 230. The elastic arm 232 first extends along the short side 2302 of the outer frame 230, then extends along the long side 2300, and then turns to connect with the end of the inner frame 231 facing away from the outer connecting portion 2321. In this way, the inner connecting portions 2320 of the two elastic arms 232 are respectively connected to the two ends of the inner frame 231 along the length direction of the spring piece 23, which can make more full use of the space in the length direction of the spring piece 23, reduce the occupation of the space in the width direction, and thus ensure the width and length of the elastic arm 232. Optionally, the inner frame 231 is roughly rectangular, and is consistent with the length direction and width direction of the outer frame 230, so as to reduce the occupation of the space in the width direction while ensuring the connection area with the bone magnetic circuit assembly 21.

[0159] The spring sheet 23 and the elastic arm 232 of this structure can fully utilize the hollow area between the outer frame 230 and the inner frame 231, so that the width and length of the elastic arm 232 can be made larger, which is beneficial to ensure the vibration stability of the bone conduction magnetic circuit assembly 21. Fig.23a and Figure 23b As shown, Fig.23a and Figure 23b The simulation diagrams of the first-order mode and the second-order mode of the bone conduction sound generating device 2 using the shrapnel 23 of an embodiment are respectively shown. It can be seen from the figure that the resonant frequency of the first-order mode is 181.4 Hz, and the resonant frequency of the second-order mode is 1299.2 Hz. The two are far apart, and the second-order mode has little effect on the first-order mode, which is beneficial to reduce rolling vibration, alleviate vibration imbalance, avoid THD increase and reduce noise.

[0160] It should be noted that the bone magnetic circuit assembly 21 can be formed by connecting multiple parts (split type), and can also be formed by integral magnetization if the structure can be realized. When it is formed by connecting multiple parts, the magnet 210 and the magnetic plate 211 are independent parts, and the independent parts are 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 single part (integrated type), and the magnet 210 and the 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 integral, which means that at least the whole formed by the magnet 210 and the magnetic plate 211 is an integral single part, and the spacer used by the bone magnetic circuit assembly 21 to connect to the spring 23 can be an independent part or an integral part. For example, Fig.16b , Fig.17b , Fig.18b and Fig.19b They are shown respectively with Fig.16a , Fig.17a , Fig.18a and Fig.19a 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 boundary between two independent parts is indicated by a solid line, and the boundary between different parts (magnetic plate 211 and magnet 210) in the integrated part is indicated by a dotted line. Fig.17b and Fig.19b The spacer (gasket 26) in is an independent part. Fig.16b and Fig.18b The spacer (boss 2113) in the bone magnetic circuit assembly is integrated. The integrated magnetization method can refer to the patent document with application number 202111062238.3, the entire content of which is incorporated herein by reference.

[0161] Next, the air conduction sound generating device 3 of the sound generating unit 10 is described with examples.

[0162] In some embodiments, Figure 25 to Figure 27 , Figure 31 to Figure 34 As shown, the air conduction sound-generating device 3 includes an annular air conduction support 30 and an air conduction magnetic circuit component 31 and a diaphragm component 32 both connected to the air conduction support 30. The air conduction support 30 can be made of a lightweight material (such as 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 component 32 includes an air conduction coil 320 located in the magnetic field of the air conduction magnetic circuit component 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 component 31, thereby driving the diaphragm 321 to vibrate.

[0163] Next, the air-conduction magnetic circuit component 31 of the air-conduction sound-generating device 3 is first described by way of example.

[0164] The air-conducting magnetic circuit assembly 31 at least includes a magnetic support member 310 connected to the bottom of the air-conducting bracket 30 , a main magnet 311 disposed on the surface of the magnetic support member 310 facing the diaphragm assembly 32 , and a main pole core plate 313 connected to the main magnet 311 .

[0165] The magnetic conductive support member 310 is made of a magnetic conductive material and includes a plate-shaped magnetic conductive bottom plate 3100. Optionally, the thickness of the magnetic conductive bottom plate 3100 is 0.3 to 0.6 mm, so that it has a good magnetic conductive effect and is conducive to preventing magnetic leakage. Fig. 27 and Fig.32 The magnetic conductive support member 310 also includes a magnetic conductive side plate 3101 protruding from the side edge of the magnetic conductive bottom plate 3100 toward the diaphragm assembly 32, and the magnetic conductive side plate 3101 at least partially extends to be arranged opposite to the main pole core plate 313, and there is a gap between the magnetic conductive side plate 3101 and the main pole core plate 313, thereby forming an air conductive gap 315. Optionally, the magnetic conductive bottom plate 3100 is rectangular, and the magnetic conductive side plates 3101 can be arranged only on two opposite sides of the magnetic conductive bottom plate 3100, or on four sides of the magnetic conductive bottom plate 3100, and a magnetic conductive ring 3102 can also be arranged on the magnetic conductive bottom plate 3100. Figures 28 to 30 It 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. Fig.28 In the illustrated embodiment, a magnetic conductive side plate 3101 is provided at each of the two short sides of the magnetic conductive bottom plate 3100. Fig.29 In the illustrated embodiment, a magnetic conductive side plate 3101 is provided at each of the two long sides of the magnetic conductive bottom plate 3100. Fig.30In the illustrated embodiment, each of the four sides of the magnetic conductive bottom plate 3100 is provided with a magnetic conductive side plate 3101. It is understandable 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 Figure 31 to Figure 34 As shown, Fig.32 yes Fig.31 The cross-sectional view of the air conduction sound generating device 2 shown in FIG. Fig.33 yes Fig.32 The enlarged view of Part III, Fig.34 yes Fig.31 3D diagram of the magnetic conductive support 310, the main magnet 311 and the main pole core plate 313 in FIG. The magnetic conductive support 310 includes a magnetic conductive bottom plate 3100 and a magnetic conductive ring 3102 protruding from the side edge of the magnetic conductive bottom plate 3100 toward the diaphragm assembly 32, and the magnetic conductive ring 3102 is formed by connecting four magnetic conductive side plates 3101. The magnetic conductive ring 3102 surrounds the outside of the main pole core plate 313 to form an air conductive gap 315, and the air conductive coil 320 extends into the air conductive gap 315.

[0166] In some embodiments, reference Fig.35 , Fig.35 For along Fig. 27 In the cross-sectional view obtained by the JJ section line, the air-conducting magnetic circuit component 31 also 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, and the two opposite secondary magnets 312 are respectively located on both sides of the main magnet 311. In some embodiments, the air-conducting magnetic circuit component 31 also 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 component 32 to improve the magnetic conductivity effect. The secondary pole core plate 314 and the main pole core plate 313 are at least partially arranged opposite to each other, and an air conduction 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 conduction magnetic gap 315 is basically of equal width and the magnetic field distribution in the magnetic gap is more uniform. Figure 36 to Figure 38 It is a top view of the air-conducting magnetic circuit assembly 31 , so as to show the position and number of the secondary pole core plate 314 and the secondary magnet 312 . Fig.36 In the illustrated embodiment, a secondary magnet 312 and a secondary pole core plate 314 are correspondingly disposed at the two short sides of the magnetic conductive bottom plate 3100 . Fig.37 In the illustrated embodiment, a secondary magnet 312 and a secondary pole core plate 314 are correspondingly disposed at two long sides of the magnetic conductive bottom plate 3100 . Fig.38In the illustrated embodiment, each of the four sides of the magnetic conductive bottom plate 3100 is provided with a secondary magnet 312 and a secondary pole core plate 314. Optionally, the two ends of the secondary pole core plate 314 in the length direction exceed the two ends of the secondary magnet 312 in the length direction to further improve the magnetic conductive effect. The distance L9 that the secondary pole core plate 314 exceeds the secondary magnet 312 in its length direction can be 0.03 to 0.2 mm. Optionally, the two ends of the secondary pole core plate 314 in the length direction exceed the secondary magnet 312 by the same distance.

[0167] The magnetic poles of the main magnet 311 are arranged along the vibration direction B of the air conduction sound-generating device 3, and the magnetic poles of the auxiliary magnet 312 are also arranged along the vibration direction B, and are arranged in the opposite direction to the magnetic pole arrangement direction of the main magnet 311. It can be understood that the vibration direction B of the air conduction sound-generating device 3 is consistent with the vibration direction of the diaphragm 321. The setting of the auxiliary magnet 312 can enhance the magnetic field strength and increase the BL value, thereby improving the sensitivity of the air conduction sound-generating device 3. The auxiliary pole core plate 314 can guide the magnetic flux lines, and it cooperates with the main pole core plate 313 to make the magnetic flux lines of the main magnet 311 and the auxiliary magnet 312 pass through the air conduction coil 320 of the diaphragm assembly 32 more concentratedly, thereby improving the driving force and sensitivity.

[0168] It is understandable that the magnetic conductive side plate 3101 may or may not be provided on the outer side of the secondary magnet 312. Optionally, when the secondary magnet 312 is provided on one side of the main magnet 311, the magnetic conductive side plate 3101 is no longer provided on this side to reduce the mass and volume. Fig.39 As shown, Fig.39 Shows Fig.25 A schematic diagram of the structure of the air-conducting magnetic circuit component 31 of the air-conducting sound-generating device 3. Magnetic conductive side plates 3101 are provided at both short sides of the magnetic conductive bottom plate 3100, and no magnetic conductive side plates 3101 are provided at the long sides. A secondary magnet 312 is provided at the long sides of the magnetic conductive bottom plate 3100. Optionally, the distance between the magnetic conductive side plate 3101 and the main pole core plate 313 is the same as the distance between the secondary pole core plate 314 and the main pole core plate 313, so that the width of the air-conducting gap 315 around the main magnet 311 is consistent, and the vibration is more balanced.

[0169] Next, the diaphragm assembly 32 of the air conduction sound generating device 3 is described with examples.

[0170] like Fig.33 , Fig.40 , Fig.41 ,and Fig.42As shown, the diaphragm 321 includes an outer ring sheet 3210 connected to the air guide bracket 30, a flat sheet-shaped intermediate sheet body 3211 located inside the outer ring sheet 3210, and a folding ring portion 3212 located between the outer ring sheet 3210 and the intermediate sheet body 3211. The folding ring portion 3212 seals the area between the outer ring sheet 3210 and the intermediate sheet body 3211. The cross section of the folding ring portion 3212 is arc-shaped, and it can be concave toward the side where the air guide magnetic circuit component 31 is located (refer to Fig.40 and Fig.42 ), or it may protrude in a direction away from the side where the air-conducting magnetic circuit component 31 is located (refer to Fig.33 and Fig.41 Optionally, the outer ring piece 3210 is connected to the end surface 300 of the air conduction support 30, for example, by gluing (for example, gluing or double-sided tape).

[0171] One end of the air conduction coil 320 is connected to the middle sheet 3211 of the diaphragm 321, and the other end extends into the air conduction magnetic gap 315, which surrounds the outside of the main pole core plate 313 and is located on the inner side of the magnetic conductive side plate 3101. The main pole core plate 313 and the magnetic conductive side plate 3101 can guide and converge the magnetic flux lines, so that the magnetic flux lines pass through the coil more concentratedly and evenly, thereby improving the sensitivity and driving force. When the air conduction coil 320 is connected to an alternating current, it will vibrate back and forth under the interaction with the magnetic field, thereby driving the diaphragm 321 to vibrate, and the diaphragm 321 pushes the air to vibrate and make sound.

[0172] In some embodiments, reference Fig. 27 and Fig.41 In order to enhance the strength of the middle sheet 3211 and improve the sound quality, the diaphragm assembly 32 further includes a reinforcing sheet 3213 attached to the surface of the middle sheet 3211. The material of the reinforcing sheet 3213 can be the same as or different from the material of the diaphragm 321. Optionally, the reinforcing sheet 3213 and the middle sheet 3211 have the same shape and area to comprehensively reinforce the middle sheet 3211. Optionally, the thickness of the reinforcing sheet 3213 is 0.08-0.3 mm, and the material of the reinforcing sheet 3213 is a polymer or a metal or a composite of a polymer and a metal; the polymer can be, for example, polyethylene, polypropylene, polyester, polyetherimide, polyethylene terephthalate, a carbon fiber composite material or a pulp fiber composite material; the metal can be, for example, aluminum, aluminum alloy, titanium, titanium alloy, a laminate of an aluminum-based material and a foamed material, a laminate of a titanium-based material and a foamed material, etc. The composite of a polymer and a metal can be, for example, an aluminum layer intermediate package carbon fiber composite material. It is understandable that when the reinforcing sheet 3213 is provided, the middle sheet 3211 may not be fully enclosed. Fig.41 As shown, Fig.41It is an exploded view of a diaphragm 321 and a reinforcing sheet 3213 of an embodiment. An opening 32110 is provided in the middle of the middle sheet 3211. The reinforcing sheet 3213 is connected to the middle sheet 3211 to seal the hole, which can reduce the mass of the diaphragm assembly 32.

[0173] In some embodiments, reference Fig. 27 and Fig.40 The air conduction sound generating device 3 further includes a gland 33, which is annular and connected to the surface of the outer ring sheet 3210 and extends to be arranged opposite to the folding ring portion 3212, thereby protecting the inner folding ring portion 3212. At the same time, the gland 33 is provided with a flat outer end surface 330, and can be connected to the housing component 100 through the outer end surface 330, for example, by coating glue on the outer end surface 330 or providing double-sided tape 331, so as to be adhesively connected to the housing component 100. Fig.43 The figure shows the situation when the double-sided adhesive tape 331 is provided on the outer end surface 330. Optionally, the inner end 334 of the pressure cover 33 (the end close to the middle piece 3211) is provided with a recess 332 on the surface facing the diaphragm 321. The recess 332 makes the part closer to the inner end 334 of the pressure cover 33 farther from the middle piece 3211 in the vibration direction B, thereby reliably avoiding the vibration of the diaphragm 321. Optionally, refer to Fig.25 and Fig.26 The end surface 300 of the air conduction support 30 is provided with a plurality of outwardly protruding columns 301, and the gland 33 is provided with limiting grooves 333 adapted to the columns 301, and the positioning of the gland 33 is achieved by the matching of the limiting grooves 333 and the columns 301. Optionally, the columns 301 are provided at the four corners of the air conduction support 30, and the limiting grooves 333 are provided at the four corners of the gland 33.

[0174] It is understood that, in the embodiment where the air conduction sound generating device 3 does not include the pressure cover 33, the outer ring piece 3210 can be connected to the housing 1000, and the diaphragm 321 can seal the front cavity 10042. For example, in the embodiment where the side shell 1004 is not provided with the mounting groove 10041, the outer ring piece 3210 can be connected to the inner wall of the side shell 1004, and in the embodiment where the side shell 1004 is provided with the mounting groove 10041, the outer ring piece 3210 can be connected to the bottom surface 10043 of the groove. In the embodiment where the air conduction sound generating device 3 includes the pressure cover 33, the pressure cover 33 can be connected to the housing 1000, and the air conduction sound generating device 3 can seal the front cavity 10042. For example, in an embodiment where the side shell portion 1004 is not provided with the mounting groove 10041, the pressure cover 33 can be connected to the inner wall of the side shell portion 1004, and in an embodiment where the side shell portion 1004 is provided with the mounting groove 10041, the pressure cover 33 can be connected to the groove bottom surface 10043.

[0175] In some embodiments, the bone conduction sound device 2 and the air conduction sound device 3 are not in contact, and the two 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 illustrated embodiment, 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 is understandable 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 compact 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, and affecting the user experience. At the same time, because of the increase in weight, the vibration mass will also 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 illustrated embodiment, 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.

[0176] The magnetic bottom plate 3100 and / or the magnetic side plate 3101 of the magnetic support 310 are provided with at least one opening so that the interior of the air-conducting sound-generating device 3 can be connected with the interior of the housing assembly 100, so that the air flow can flow smoothly. Optionally, the total area of ​​all the vents 3c of the magnetic support 310 is 2 to 15 mm 2 , so as to ensure the air flow and reduce the adverse effect of the vent hole 3c on the anti-magnetic leakage. Further, optionally, the total area of ​​all the openings is 4 to 12 mm 2 , to further ensure the effect.

[0177] Next is an illustration of the volume, mass and density of the bone conduction sound generating device 2 and the air conduction sound generating device 3.

[0178] 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 not too large or too small, thereby improving the wearing comfort and providing sufficient space for the installation of 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.

[0179] The volume of an object (such as a bone conduction sound-generating device 2, an air conduction sound-generating device 3, and a 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 a cuboid, a cylinder, or a cuboid-like, cylinder-like, etc., the volume can be calculated by multiplying the bottom area by the height. The volume of a 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, Fig.13a 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 the bone conduction support 20. Fig.25 and Fig.31 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 surface 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.

[0180] The larger the volume of the bone conduction sound-generating device 2, the larger the size of its bone conduction bracket 20 and the internal bone conduction magnetic circuit assembly 21 and bone conduction coil 22, so that the bone conduction sound-generating device 2 can provide a greater loudness. However, the larger the volume, the more space there is for the installation of the air conduction sound-generating device 3 and other components, affecting the sound effect of the air conduction sound-generating device 3. Similarly, a small-volume air conduction sound-generating device 3 can save space inside the device, so that other components of the headset (bone conduction sound-generating device, circuit board, etc.) can get more space, thereby improving the functionality and performance of the device.

[0181] 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 180-500 mm 3 , so that its volume is more appropriate, and 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 220-360 mm 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.

[0182] In some embodiments, the volume ratio of the air conduction sound-generating device 3 and the sound-generating unit 10 is 0.03 to 0.18, and 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-generating device 3 can be, and the larger the effective radiation area of ​​the diaphragm can be, and the corresponding acoustic effect is better. For example, the sensitivity of the air conduction sound-generating device 3 will be improved. However, if the air conduction sound-generating device 3 is too large, it will be inconvenient to install other parts, and it will occupy the space of the bone conduction sound-generating device 2, affecting the sound effect of the bone conduction sound-generating device 2. If the volume ratio is too small, the internal space will be wasted, which is not conducive to miniaturizing the earphone and reducing its weight. The volume ratio of the bone conduction sound device 2 and the sound unit 10 is 0.12-0.32. 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 miniaturizing the earphone and reducing its weight.

[0183] Further optionally, the volume ratio of the air conduction sound device 3 and the sound unit 10 is 0.06-0.12, and the volume ratio of the bone conduction sound device 2 and the sound unit 10 is 0.18-0.28, so as to further make the space ratio occupied by the bone conduction sound device 2 and the air conduction sound device 3 more reasonable.

[0184] In some embodiments, in order 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 greater 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 large volume of the bone conduction sound-generating device 2 is conducive to providing a larger vibration amount. The air conduction sound-generating device 3 relies on the diaphragm to generate sound, and can achieve the air conduction sound transmission effect with a smaller volume, thereby achieving a balance between the volume of air conduction sound and bone conduction sound, and improving the overall sound effect 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 be further selected as 1.7 to 4.2, and further selected as 2 to 3.6, so as to further improve the sound effect and facilitate installation in the housing assembly 100.

[0185] In some embodiments, the mass of the bone conduction sound device 2 is 3-5g. The mass of the bone conduction sound device 2 affects the mass of the earphone head, and the mass of the earphone head affects the user's experience. When it is too heavy, the user will feel a noticeable wearing sensation. Setting the mass of the bone conduction sound device 2 to no more than 5g is conducive to ensuring wearing comfort. At the same time, in order to obtain better acoustic performance, the bone conduction magnetic circuit component 21 of the bone conduction sound device 2 needs to have a suitable mass for adjusting F0 and providing a larger vibration force, so it is set to be greater than 3g. In some embodiments, the mass of the air conduction sound device 3 is 0.6-1.6g. Similarly, a lighter mass can improve wearing comfort, especially for long-term wearing.

[0186] In order to improve the sound effect of the sound unit, in some embodiments, the mass of the bone conduction sound device 2 is greater than the mass of the air conduction sound device 3. Optionally, the ratio of the mass of the bone conduction sound device 2 to the mass of the air conduction sound device 3 is 2 to 6. The bone conduction sound device 2 needs to drive the heavier vibrator to vibrate, while the air conduction sound device 3 relies on the lighter diaphragm assembly 32 to vibrate and produce sound. Therefore, the bone conduction sound device 2 has a large mass, which is conducive to the use of a larger coil and magnet, thereby providing a larger vibration amount, while the air conduction sound device 3 relies on the diaphragm to produce sound, and can achieve a better air conduction sound transmission effect with a smaller mass, thereby improving the overall sound effect of the sound unit 10.

[0187] Further optionally, the mass of the bone conduction sound emitting device 2 can be selected to be 3.3-4.3 g, and the mass of the air conduction sound emitting device 3 can be selected to be 0.8 g-1.4 g, so that the masses of the bone conduction sound emitting device 2 and the air conduction sound emitting device 3 are more reasonable.

[0188] Further optionally, the ratio of the mass of the bone conduction sound generating device 2 to the mass of the air conduction sound generating device 3 may be selected to be 2.5 to 5.2, and further may be selected to be 3 to 4.5, so as to further balance the sound generating effect and the quality.

[0189] 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.

[0190] The above are only specific embodiments of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A head-mounted sound device, characterized in that: include: Two sound-generating units (10), the sound-generating units (10) comprising a housing component (100) and a bone conduction sound-generating device (2) and an air conduction sound-generating device (3) both arranged in the housing component (100); Two functional compartments, each of which is used to accommodate a control circuit board and / or a battery; an ear hook (111), adapted to be hooked on an ear, wherein the housing component (100) and the functional compartment are connected via the ear hook (111); and A rear hanging (110), adapted to be wrapped around the back of the head and connected between the two functional compartments; Wherein, the ratio of the total mass of the two sound-generating units (10) to the total mass of the two functional compartments and the rear suspension (110) is 0.7 to 1.

3.

2. The head-mounted sound device according to claim 1, characterized in that: The ratio of the total mass of the two sound-generating units (10) to the total mass of the two functional compartments and the rear suspension (110) is 0.8 to 1.

2.

3. The head-mounted sound device according to claim 1, characterized in that: The total mass of the head-mounted sound-emitting device is 22 g to 40 g, and a single sound-emitting unit (10) accounts for 0.13 to 0.27 of the total mass of the device.

4. The head-mounted sound device according to claim 3, characterized in that: The mass of a single sound-generating unit (10) is 4 to 7 g.

5. The head-mounted sound device according to claim 4, characterized in that: The mass of a single sound-generating unit (10) is 5 to 6 g.

6. The head-mounted sound generating device according to claim 3, characterized in that: The mass of the bone conduction sound generating device (2) is 3 to 5 g.

7. The head-mounted sound-generating device according to claim 6, characterized in that: The mass of the bone conduction sound generating device (2) is 3.3 to 4.3 g.

8. The head-mounted sound device according to claim 3, characterized in that: The mass of the air conduction sound generating device (3) is 0.6 to 1.6 g.

9. The head-mounted sound device according to claim 8, characterized in that: The mass of the air conduction sound generating device (3) is 0.8 to 1.4 g.

10. The head-mounted sound device according to claim 1, characterized in that: The volume of a single sound-generating unit (10) ranges from 2500 to 5500 mm 3 , the volume of the bone conduction sound generating device (2) is greater than the volume of the air conduction sound generating device (3).

11. The head mounted sound generating device according to claim 10, wherein: The volume of the bone conduction sound generating device (2) is 600-1000mm 3 .

12. The head mounted sound generating device according to claim 11, wherein: The volume of the bone conduction sound generating device (2) is 700-900 mm 3 .

13. The head mounted sound generating device according to claim 10, wherein: The volume of the air-conduction sound generating device (3) is 180-500 mm 3 .

14. The head mounted sound generating device according to claim 13, wherein: The volume of the air-conduction sound generating device (3) is 220-360 mm 3 .

15. The head mounted sound generating device according to claim 1, wherein: The volume ratio of the air conduction sound generating device (3) to the sound generating unit (10) is 0.03 to 0.

18.

16. The head mounted sound generating device according to claim 15, wherein: The volume ratio of the air conduction sound generating device (3) to the sound generating unit (10) is 0.06 to 0.

12.

17. The head-mounted sound device according to claim 1, characterized in that: The volume ratio of the bone conduction sound generating device (2) to the sound generating unit (10) is 0.12 to 0.

32.

18. The head mounted sound generating device according to claim 17, wherein: The volume ratio of the bone conduction sound generating device (2) to the sound generating unit (10) is 0.18 to 0.

28.

19. The head mounted sound generating device according to claim 1, wherein: The sound-emitting unit (10) has a contact surface (10010) that contacts human skin when the head-mounted sound-emitting device is worn, and the functional chamber has a side surface (1123) that faces the human body when the head-mounted sound-emitting device is worn, and the angle between the contact surface (10010) and the side surface (1123) is 160° to 170°.

20. The head mounted sound generating device according to claim 1, wherein: The housing assembly (100) comprises a housing (1000) and a face cover (1001) connected to the housing (1000); the housing (1000) comprises a side housing portion (1004) and a back cover (1002) connected to the side housing portion (1004); the bone conduction sound generating device (2) is connected to the face cover (1001) and / or the back cover (1002), and the positive direction of its vibration direction A points to the contact surface (10010) between the face cover (1001) and the human body; the air conduction sound generating device (3) is connected to the side housing portion (1004) of the housing (1000), and the positive direction of its vibration direction B points to the side housing portion (1004).

21. The head mounted sound generating device according to claim 20, wherein: When 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, the air conduction sound-emitting device (3) is arranged close to the proximal end (10040) relative to the bone conduction sound-emitting device (2), and is arranged to emit sound toward the proximal end (10040), and the proximal end (10040) is provided with a sound outlet hole (1003) for the sound of the air conduction sound-emitting device (3) to be transmitted.

22. The head mounted sound generating device according to claim 21, wherein: When the head-mounted sound-emitting device is worn, the positive direction of the axial direction of the sound outlet hole (1003) points into the auricle.

23. The head mounted sound generating device according to claim 22, wherein: The axial direction of the sound outlet hole (1003) is consistent with the vibration direction of the air-conducted sound-generating device (3); or, The angle between the axial direction of the sound outlet hole (1003) and the contact surface (10010) is greater than the angle between the vibration direction of the air-conducted sound-generating device (3) and the contact surface (10010).

24. The head mounted sound generating device according to claim 22, wherein: The bone conduction sound generating device (2) and the air conduction sound generating device (3) are arranged along the width direction of the sound generating unit (10); the bone conduction sound generating device (2) and the air conduction sound generating device (3) are in the shape of long strips; the length-to-width ratio of the bone conduction sound generating device (2) is 1.3-3; the length-to-width ratio of the air conduction sound generating device (3) is 1.3-3; the air conduction sound generating device (3) is located on one side of the width direction of the bone conduction sound generating device (2); the length direction of the bone conduction sound generating device (2) is consistent with the length direction of the sound generating unit (10); and the distance L8 between the air conduction sound generating device (3) and the bone conduction sound generating device (2) is 0.3-6 mm.

25. The head mounted sound generating device according to claim 22, wherein: The bone conduction sound generating device (2) comprises: A bone conduction stent (20), the bone conduction stent (20) is ring-shaped and is made of a magnetic conductive material or a non-magnetic conductive material; A bone conduction magnetic circuit component (21), arranged 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 sheet (23) is connected between the bone conduction magnetic circuit component (21) and the bone conduction support (20).

26. The head mounted sound generating device according to claim 22, wherein: 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 arranged in the air-conducting support (30), comprising a magnetic conductive bottom plate (3100) and a main magnet (311) and a main pole core plate (313) connected to the magnetic conductive bottom plate (3100); the air-conducting magnetic circuit component (31) further comprises a magnetic conductive side plate (3101) connected to the magnetic conductive bottom plate (3100) and / or a secondary magnet (312) connected to the magnetic conductive bottom 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).

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