Sound production part

Abstract

One or more embodiments of the present specification relate to a sound production unit comprising a diaphragm, a magnetic circuit assembly, a coil, and a bracket disposed around the magnetic circuit assembly. The coil is connected with the vibrating diaphragm, at least part of the coil is located in a magnetic gap formed by the magnetic circuit assembly, the coil drives the vibrating diaphragm to vibrate to generate sound after being electrified, and the vibrating diaphragm comprises a main body area and a folding ring area surrounding the main body area; the support is connected with the portion, away from the main body area, of the folding ring area, and a plurality of air holes are formed in the support. The ratio of the total area of the plurality of air holes to the projected area of the vibrating diaphragm in the vibrating direction of the vibrating diaphragm is in the range of 0.008-0.3.

Description

[0001] Cross-references

[0002] This application is a divisional application of Chinese patent application 202320670912.4 entitled “A sound-generating part” filed on March 24, 2023. The parent application claims priority of the international application with application number PCT / CN2022 / 144339 filed on December 30, 2022. All contents are incorporated herein by reference. Technical Field

[0003] The present invention relates to the field of acoustics, and in particular to a sound-generating part. Background Art

[0004] With the development of acoustic output technology, sound-emitting parts (e.g., headphones) have been widely used in people's daily lives. They can be used in conjunction with electronic devices such as mobile phones and computers to provide users with an auditory feast. The output performance of the sound-emitting part has a great impact on the user's comfort. The structure of the diaphragm in the sound-emitting part and the supporting structure that cooperates with the diaphragm usually affect the output performance of the sound-emitting part. Therefore, it is necessary to propose a sound-emitting part with high output performance. Utility Model Content

[0005] The embodiment of the present specification provides a sound-generating part, including: a diaphragm; a magnetic circuit assembly; a coil, the coil is connected to the diaphragm and is at least partially located in the magnetic gap formed by the magnetic circuit assembly, and the coil drives the diaphragm to vibrate to generate sound after being energized, wherein the diaphragm includes a main body area and a folding ring area surrounding the main body area; a bracket arranged around the magnetic circuit assembly, the bracket is connected to a portion of the folding ring area away from the main body area, and a plurality of air holes are provided on the bracket; and a shell, the shell is provided with a pressure relief hole, wherein the sound on the back of the diaphragm is transmitted to the pressure relief hole through the plurality of air holes, and the plurality of air holes at least include a first air hole and a second air hole, the distance between the center of the first air hole and the center of the pressure relief hole is greater than the distance between the center of the second air hole and the center of the pressure relief hole, and the area of ​​the first air hole is greater than the area of ​​the second air hole. Through the above arrangement, the air pressure in the back cavity can be balanced, so that the diaphragm is evenly stressed and the low-frequency vibration of the sound-generating part is more stable.

[0006] In some embodiments, the main body region includes a first inclined section and a first connecting section connected to the coil, the first inclined section is in contact with a portion of the folding ring region, and the first inclined section is inclined relative to the first connecting section in a direction away from the coil. Through the above arrangement, it is possible to prevent the glue used for bonding from overflowing into the folding ring region when the coil is bonded to the diaphragm, causing the glue to corrode the folding ring region and affect the vibration performance of the diaphragm.

[0007] In some embodiments, the folding ring area includes a second inclined section, and the second inclined section is at least partially in contact with the first inclined section. The above arrangement can prevent the glue used for bonding the coil to the diaphragm from overflowing into the folding ring area, causing the glue to corrode the folding ring area and affect the vibration performance of the diaphragm.

[0008] In some embodiments, the second inclined section is located on a side of the first inclined section away from the coil. The above arrangement can prevent the glue used for bonding the coil to the diaphragm from overflowing into the folding ring area, causing the glue to corrode the folding ring area and affect the vibration performance of the diaphragm.

[0009] In some embodiments, the folding ring area includes an arc segment, and the ratio of the height of the arc segment to the span of the arc segment is in the range of 0.35-0.4. Through the above arrangement, the sound-generating part can have a better output and lower distortion.

[0010] In some embodiments, the first inclined section has an inclination angle relative to the first connecting section in the range of 5°-30°, and the first connecting section is perpendicular to the vibration direction of the diaphragm. Through the above arrangement, the distortion of the sound-emitting part can be reduced, and the corrosion of the folding ring area and the influence on the vibration of the folding ring area can be avoided.

[0011] In some embodiments, the main body region includes a dome, the dome is located at an end of the first connecting section away from the first inclined section, the span of the dome is in the range of 2mm-8mm, and the height of the dome is in the range of 0.7mm-1.2mm. Through the above arrangement, the sound-emitting part as a whole can have a suitable thickness and improve the vibration characteristics of the sound-emitting part.

[0012] In some embodiments, the ratio of the height of the dome to the span is in the range of 0.1-0.3. Through the above arrangement, the sound-emitting part as a whole can have a suitable thickness and improve the vibration characteristics of the sound-emitting part.

[0013] In some embodiments, the frequency of high-frequency split vibration is not less than 20 kHz. Through the above configuration, the diaphragm can have a wider high-frequency bandwidth while reducing the occurrence of high-frequency split vibration in the bandwidth area.

[0014] In some embodiments, the magnetic circuit assembly includes a housing, and at an input voltage of 0.1V-0.7V, a distance from the bottom of the coil to the bottom of the housing is in the range of 0.8mm-0.9mm in the frequency range of 20Hz-6.1kHz.

[0015] In some embodiments, the sound-emitting part further comprises a bracket arranged around the magnetic circuit assembly, and the first part of the bracket is connected to the second connecting section of the folding ring area. Through the above arrangement, the bracket and the diaphragm can be fixed.

[0016] In some embodiments, the second connecting section of the folding ring area is connected to the first part of the support via a fixing ring. Through the above arrangement, the support and the diaphragm can be fixed.

[0017] In some embodiments, the thickness of the first portion where the bracket is connected to the folding area is in the range of 0.3 mm to 3 mm, and the thickness of the first portion is the minimum distance between the connection area between the bracket and the folding area and the area where the bracket directly fits the magnetic circuit component in the vibration direction of the diaphragm. Through the above arrangement, the sound-emitting part can have a higher low-frequency output, and the frequency response curve of the rear cavity can have a larger flat area, thereby improving the sound quality of the sound-emitting part.

[0018] In some embodiments, the housing is provided with a pressure relief hole, and a rear cavity is formed between the pressure relief hole and the back of the diaphragm, and the resonance frequency of the rear cavity is not less than 3.3kHz. Through the above arrangement, the frequency response curve of the rear cavity can have a relatively large flat area, thereby improving the sound quality of the sound-emitting part.

[0019] In some embodiments, the volume of the rear cavity is 60 mm 3 -110mm 3 within the range.

[0020] In some embodiments, the sound-generating part further comprises a shell, a pressure relief hole is provided on the shell, a plurality of air holes are formed on the bracket, and the sound on the back of the diaphragm is transmitted to the pressure relief hole through the plurality of air holes, and in the vibration direction of the diaphragm, the ratio of the total area of ​​the plurality of air holes to the projected area of ​​the diaphragm is in the range of 0.008-0.3. With the above arrangement, the diaphragm can be subjected to uniform and small air resistance when vibrating, thereby ensuring good output performance of the sound-generating part.

[0021] In some embodiments, in the vibration direction of the diaphragm, the projection area of ​​the diaphragm is 90 mm 2 -560mm 2 The total area of ​​the plurality of vent holes is within 4.54 mm 2 -12.96mm 2 Through the above settings, the rear cavity can have a good low-frequency response.

[0022] In some embodiments, the sound-emitting part further includes a shell, and in the vibration direction of the diaphragm, the ratio of the projection area of ​​the diaphragm to the projection area of ​​the shell is not less than 0.5. Through the above arrangement, the diaphragm can have as large an area as possible within the limited size of the sound-emitting part, thereby enhancing the acoustic output performance of the sound-emitting part.

[0023] In some embodiments, in the vibration direction of the diaphragm, the ratio of the projection area of ​​the diaphragm to the projection area of ​​the shell is in the range of 0.8-0.95. Through the above arrangement, the diaphragm can have as large an area as possible within the limited size of the sound-emitting part, thereby enhancing the acoustic output performance of the sound-emitting part.

[0024] In some embodiments, the long axis size of the diaphragm is in the range of 13 mm to 25 mm, and the short axis size of the diaphragm is in the range of 4 mm to 13 mm. Through the above arrangement, the whole or part of the sound-emitting part can be extended into the concha cavity to form an effective cavity-like body, thereby enhancing the acoustic output performance of the sound-emitting part.

[0025] In some embodiments, a plurality of air holes are provided on the bottom wall of the container of the magnetic circuit assembly or on the side wall that fits the bracket. Through the above arrangement, the sound on the back of the diaphragm can be transmitted to the rear cavity and the pressure relief hole through the plurality of air holes, and the air holes provide a good channel for radiating sound on both sides of the diaphragm.

[0026] In some embodiments, the dome is formed by interlacing carbon fibers, at least some of which are interlaced at a first angle, and the first angle is in the range of 45°-90°. Through the above arrangement, the strength of the main body area can be increased and the equivalent density of the main body area can be reduced.

[0027] In some embodiments, in the vibration direction of the diaphragm, the thickness of the dome is less than 80 um. Through the above arrangement, the weight of the main body area can be reduced.

[0028] In some embodiments, the minimum distance between the coil and the first inclined section is not less than 0.3 mm. Through the above arrangement, the folding ring area can be kept at a safe distance from the installation position of the coil, so as to prevent the glue used for installing the coil from overflowing into the folding ring area.

[0029] In some embodiments, the magnetic circuit assembly includes a magnetic conductive plate and a magnet, the magnetic conductive plate is located between the magnet and the diaphragm and attached to the surface of the magnet, and in the vibration direction of the diaphragm, the distance between the center of the coil and the center of the magnetic conductive plate is less than 0.3 mm. Through the above arrangement, when the diaphragm vibrates up and down, at least part of the coil can be located in the area with higher magnetic flux density of the magnetic circuit assembly, so as to improve the magnetic field utilization efficiency of the magnetic circuit assembly.

[0030] In some embodiments, in the vibration direction of the diaphragm, the distance from the lowest point of the spherical top to the upper surface of the magnetic conductive plate is greater than 0.8 mm. Through the above arrangement, the maximum amplitude of the diaphragm can be met so that the diaphragm does not collide with the magnetic conductive plate during vibration.

[0031] In some embodiments, the magnetic circuit assembly includes a container, and in the vibration direction of the diaphragm, the distance between the bottom of the coil and the bottom wall of the container is in the range of 0.2mm-4mm. Through the above arrangement, the volume of the sound-generating part can be prevented from being too large, and the collision of the coil can be avoided.

[0032] In some embodiments, the distance between the coil and the side wall of the container is in the range of 0.1 mm to 0.5 mm. Through the above arrangement, the collision of the coils can be avoided and the power provided by the magnetic field to the diaphragm can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0034] Figure 1 is a schematic diagram of an exemplary ear according to some embodiments of the present application;

[0035] Figure 2 is an exemplary wearing diagram of an open-type headset according to some embodiments of this specification;

[0036] Figure 3 is an exemplary wearing diagram of an open-type headset according to some embodiments of this specification;

[0037] Figure 4 is an exemplary wearing diagram of another open-ear headset according to some embodiments of this specification;

[0038] Figure 5 is an exemplary distribution diagram of a cavity structure arranged around one of the dual sound sources shown in some embodiments of this specification;

[0039] Figure 6 is a schematic diagram of an exemplary internal structure of a sound-producing part according to some embodiments of this specification;

[0040] Figure 7 is an exemplary appearance diagram of a transducer according to some embodiments of the present specification;

[0041] Figure 8 is an exemplary exploded view of a transducer according to some embodiments of the present specification;

[0042] Fig. 9 is an exemplary internal structure diagram of a sound-producing part according to some embodiments of the present specification;

[0043] Fig.10 is an exemplary structural diagram of a diaphragm according to some embodiments of this specification;

[0044] Fig.11A is a schematic diagram of an exemplary high-frequency bandwidth of a sound-emitting part according to some embodiments of the present specification;

[0045] Fig. 11B is a schematic diagram of an exemplary braided structure of carbon fiber according to some embodiments of this specification;

[0046] Fig.12 is a schematic diagram of the amplitude of the sound-emitting part under different driving voltages according to some embodiments of this specification;

[0047] Fig.13 is an exemplary structural diagram of a rear cavity according to some embodiments of this specification;

[0048] Fig.14 is a frequency response curve diagram of the rear cavity corresponding to different thicknesses of the first portion shown in some embodiments of this specification;

[0049] Fig.15 is a frequency response curve diagram of the sound-emitting part under different driving voltages according to some embodiments of the present specification;

[0050] Fig.16 is a schematic diagram of exemplary positions of a bracket, a first pressure relief hole, and a second pressure relief hole according to some embodiments of this specification; and

[0051] Fig.17 It is a frequency response curve of the rear cavity corresponding to different total areas of air holes shown in some embodiments of this specification. DETAILED DESCRIPTION

[0052] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0053] It should be understood that the "system", "device", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0054] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0055] In the description of this specification, it should be understood that the terms "first", "second", "third", "fourth", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one of the features. In the description of this specification, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In this specification, unless otherwise clearly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense. For example, the term "connection" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, it can refer to the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this specification can be understood according to the specific circumstances.

[0057] Flowcharts are used in this specification to illustrate the operations performed by the system according to the embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed precisely in order. Instead, the steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0058] Figure 1 is a schematic diagram of an exemplary ear according to some embodiments of the present application. Figure 1, the ear 100 may include an external auditory canal 101, a cavity concha 102, a cymba concha 103, a triangular fossa 104, an antihelix 105, a scaphoid 106, an auricle 107, an earlobe 108, and an auricle crus 109. In some embodiments, the wearing and stabilization of the acoustic device can be achieved with the help of one or more parts of the ear 100. In some embodiments, the external auditory canal 101, the cavity concha 102, the cymba concha 103, the triangular fossa 104, and other parts have a certain depth and volume in three-dimensional space, which can be used to achieve the wearing requirements of the acoustic device. For example, an acoustic device (for example, an in-ear headphone) can be worn in the external auditory canal 101. In some embodiments, the wearing of the acoustic device can be achieved with the help of other parts of the ear 100 except the external auditory canal 101. For example, the wearing of the acoustic device can be achieved with the help of the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the auricle 107, and other parts or a combination thereof. In some embodiments, in order to improve the comfort and reliability of the acoustic device in wearing, it is also possible to further use the user's earlobe 108 and other parts. By using other parts of the ear 100 other than the external auditory canal 101 to achieve the wearing of the acoustic device and the propagation of sound, the user's external auditory canal 101 can be "liberated" and the impact of the acoustic device on the user's ear health can be reduced. When the user wears the acoustic device on the road, the acoustic device will not block the user's external auditory canal 101. The user can receive both the sound from the acoustic device and the sound from the environment (for example, horns, car bells, surrounding human voices, traffic control sounds, etc.), thereby reducing the probability of traffic accidents. For example, when the user wears the acoustic device, the entire or partial structure of the acoustic device can be located on the front side of the helix crus 109 (for example, Figure 1 For another example, when the user wears the acoustic device, the entire or partial structure of the acoustic device may contact the upper part of the external auditory canal 101 (for example, the location of one or more parts such as the crus helix 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, the helix 107, etc.). For another example, when the user wears the acoustic device, the entire or partial structure of the acoustic device may be located in one or more parts of the ear (for example, the cavum concha 102, the cymba concha 103, the triangular fossa 104, etc.) (for example, Figure 1 The areas enclosed by the dashed lines are M1 and M2).

[0059] Different users may have individual differences, resulting in different shapes, sizes and other dimensional differences in the ears. For the sake of ease of description and understanding, if not otherwise specified, this specification will mainly use an ear model with a "standard" shape and size as a reference to further describe the wearing method of the acoustic device in different embodiments on the ear model. For example, a simulator containing a head and its (left and right) ears made based on ANSI: S3.36, S3.25 and IEC: 60318-7 standards, such as GRAS KEMAR, HEAD Acoustics, B&K 4128 series or B&K 5128 series, can be used as a reference for wearing an acoustic device, thereby presenting the scenario of most users wearing the acoustic device normally. Taking GRAS KEMAR as an example, the ear simulator can be any one of GRAS 45AC, GRAS 45BC, GRAS 45CC or GRAS 43AG. Taking HEADAcoustics as an example, the simulator of the ear can be any one of HMS II.3, HMS II.3LN or HMSII.3LN HEC. It should be noted that the data range measured in the embodiments of this specification is measured on the basis of GRAS 45BC KEMAR, but it should be understood that there may be differences between different head models and ear models, and the relevant data range may fluctuate by ±10% when using other models. Just as an example, the ear used as a reference can have the following relevant characteristics: the size of the projection of the auricle on the sagittal plane in the vertical axis direction can be in the range of 49.5mm-74.3mm, and the size of the projection of the auricle on the sagittal plane in the sagittal axis direction can be 36.6mm-55mm. The projection of the auricle on the sagittal plane refers to the projection of the edge of the auricle on the sagittal plane. The edge of the auricle is composed of at least the outer contour of the helix, the earlobe contour, the tragus contour, the intertragus notch, the antitragus cusp, the annular tragus notch, etc. Therefore, in the present application, descriptions such as "user wears", "in a wearing state" and "in a wearing state" may refer to the acoustic device described in the present application being worn on the ear of the aforementioned simulator. Of course, considering the individual differences among different users, the structure, shape, size, thickness, etc. of one or more parts of the ear 100 may be differentially designed according to ears of different shapes and sizes. These differentiated designs may be manifested as characteristic parameters of one or more parts of the acoustic device (e.g., the sound-emitting part, ear hook, etc. described below) having different ranges of values ​​to adapt to different ears.

[0060] It should be noted that in the fields of medicine and anatomy, three basic planes of the human body can be defined: the sagittal plane, the coronal plane, and the horizontal plane, as well as three basic axes: the sagittal axis, the coronal axis, and the vertical axis. Among them, the sagittal plane refers to a plane perpendicular to the ground along the front-back direction of the body, which divides the human body into left and right parts; the coronal plane refers to a plane perpendicular to the ground along the left-right direction of the body, which divides the human body into front and back parts; the horizontal plane refers to a plane parallel to the ground along the vertical direction perpendicular to the body, which divides the human body into upper and lower parts. Correspondingly, the sagittal axis refers to an axis along the front-back direction of the body and perpendicular to the coronal plane, the coronal axis refers to an axis along the left-right direction of the body and perpendicular to the sagittal plane, and the vertical axis refers to an axis along the up-down direction of the body and perpendicular to the horizontal plane. Furthermore, the "front side of the ear" mentioned in the present application refers to the side of the ear that is located along the sagittal axis and faces the human face area. Figure 1 Schematic diagram of the front profile of the ear shown.

[0061] The description of the ear 100 is for illustrative purposes only and is not intended to limit the scope of the present application. A person skilled in the art can make various changes and modifications based on the description of the present application. For example, a partial structure of the acoustic device can shield part or all of the external auditory canal 101. These changes and modifications are still within the scope of protection of the present application.

[0062] Figure 2 is an exemplary wearing diagram of an open-type headset according to some embodiments of this specification, Figure 3 is an exemplary wearing diagram of an open-type headset according to some embodiments of this specification, Figure 4 1 is an exemplary wearing diagram of another open-type earphone according to some embodiments of the present specification. In some embodiments, the open-type earphone 10 may include but is not limited to air conduction earphones and bone air conduction earphones. In some embodiments, the open-type earphone 10 may be combined with glasses, headphones, head-mounted display devices, AR / VR helmets and other products. Figure 2-Figure 4 As shown, the open-type earphone 10 may include a sound-emitting portion 11 and an ear hook 12. In some embodiments, the open-type earphone 10 may be worn on the user's body (eg, the head, neck, or upper torso) by the ear hook 12 so that the sound-emitting portion 11 is worn on the user's body.

[0063] In some embodiments, when the open earphone 10 is in the wearing state, the first part of the ear hook 12 is hung between the user's auricle and the head, and the second part extends to the side of the auricle away from the head and connects to the sound-emitting part 11, which is used to fix the sound-emitting part 11 near the ear canal but not blocking the ear canal. In some embodiments, the ear hook 12 can be an arc structure that matches the user's auricle, so that the ear hook 12 can be hung at the user's upper auricle. In some embodiments, the ear hook 12 can also be a clamping structure that matches the user's auricle, so that the ear hook 12 can be clamped at the user's auricle. In some embodiments, the ear hook 12 can include but is not limited to a hook structure, an elastic band, etc., so that the open earphone 10 can be better fixed to the user to prevent the user from falling off during use.

[0064] In some embodiments, the sound-emitting portion 11 can be worn on the user's body, and a transducer (e.g., transducer 112) can be provided in the sound-emitting portion 11 to generate sound input to the user's ear 100. In some embodiments, the open-type earphone 10 can be combined with products such as glasses, headphones, head-mounted display devices, AR / VR helmets, etc. In this case, the sound-emitting portion 11 can be worn near the user's ear 100 in a hanging or clamping manner. In some embodiments, the sound-emitting portion 11 can be in the shape of a ring, an ellipse, a polygon (regular or irregular), a U-shape, a V-shape, or a semicircle, so that the sound-emitting portion 11 can be directly hung on the user's ear 100.

[0065] Combination Figure 1 and Figure 2 In some embodiments, when the user wears the open earphone 10, at least part of the sound-emitting portion 11 may be located Figure 1 The user's ear 100 is shown in the area J in front of the tragus or the areas M1 and M2 in the auricle. Figure 2 11A, 11B and 11C) are shown for exemplary description. It should be noted that the anterior lateral side of the auricle mentioned in the embodiments of this specification refers to the side of the auricle away from the head along the coronal axis, and correspondingly, the posterior medial side of the auricle refers to the side of the auricle facing the human head along the coronal axis. In some embodiments, the sound-emitting part 11 is located at 11A, which means that the sound-emitting part 11 is located at the side of the user's ear 100 facing the human facial area along the sagittal axis, that is, the sound-emitting part 11 is located in the area J on the front side of the ear 100.

[0066] Furthermore, a transducer (such as transducer 112) is disposed inside the shell of the sound-emitting part 11, and at least one sound outlet hole (such as sound outlet hole 111a, Figure 2(not shown), the sound outlet can be located on the side wall of the sound-emitting housing facing or close to the external auditory canal 101 of the user, and the transducer can output sound to the external auditory canal 101 of the user through the sound outlet. Among them, the transducer is an element that can receive an electrical signal and convert it into a sound signal for output. In some embodiments, the type of transducer 112 can include a low-frequency (for example, 30Hz-150Hz) speaker, a mid-low frequency (for example, 150Hz-500Hz) speaker, a mid-high frequency (for example, 500Hz-5kHz) speaker, a high frequency (for example, 5kHz-16kHz) speaker or a full-frequency (for example, 30Hz-16kHz) speaker, or any combination thereof, based on the frequency. The low frequency, high frequency, etc. mentioned here only represent the approximate range of frequencies, and different division methods may be used in different application scenarios. For example, a crossover point can be determined, the low frequency represents the frequency range below the crossover point, and the high frequency represents the frequency above the crossover point. The crossover frequency point may be any value within the audible range of the human ear, for example, 500 Hz, 600 Hz, 700 Hz, 800 Hz, 1000 Hz, etc.

[0067] In some embodiments, the transducer may include a diaphragm (e.g., diaphragm 1121). When the diaphragm vibrates, sound may be emitted from the front and rear sides of the diaphragm, respectively. The chamber inside the shell of the sound-emitting portion 11 is divided by the diaphragm into at least a front chamber (e.g., front chamber 114) located in front of the diaphragm and a rear chamber (e.g., rear chamber 116) located in rear of the diaphragm. The sound outlet is acoustically coupled with the front chamber. The vibration of the diaphragm drives the air in the front chamber to vibrate to produce air-conducted sound. The air-conducted sound produced in the front chamber is transmitted to the outside through the sound outlet. In some embodiments, the shell of the sound-emitting portion 11 may also include one or more pressure relief holes (e.g., a first pressure relief hole 111c and a second pressure relief hole 111d). The pressure relief hole may be located on a side wall of the shell adjacent to or opposite to the side wall where the sound outlet is located. The pressure relief hole is acoustically coupled with the rear chamber. When the diaphragm vibrates, it also drives the air in the rear chamber to vibrate to produce air-conducted sound. The air-conducted sound produced in the rear chamber may be transmitted to the outside through the pressure relief hole. Exemplarily, in some embodiments, the transducer in the sound-emitting part 11 can output sound with a phase difference (for example, opposite phase) through the sound outlet hole and the pressure relief hole. The sound outlet hole can be located on the side wall of the shell of the sound-emitting part 11 facing the external auditory canal 101 of the user, and the pressure relief hole can be located on the side of the shell of the sound-emitting part 11 away from the external auditory canal 101 of the user. At this time, the shell can act as a baffle to increase the sound path difference between the sound outlet hole and the pressure relief hole to the external auditory canal 101, so as to increase the sound intensity at the external auditory canal 101 while reducing the volume of far-field sound leakage.

[0068] In some embodiments, the sound-emitting part 11 may have a long axis direction Y and a short axis direction Z that are perpendicular to the thickness direction X and orthogonal to each other. Among them, the long axis direction Y can be defined as the direction with the largest extension dimension in the shape of the two-dimensional projection surface of the sound-emitting part 11 (for example, the projection of the sound-emitting part 11 on the plane where its outer side surface is located, or the projection on the sagittal plane) (for example, when the projection shape is a rectangle or an approximate rectangle, the long axis direction is the length direction of the rectangle or the approximate rectangle), and the short axis direction Z can be defined as the direction perpendicular to the long axis direction Y in the shape of the projection of the sound-emitting part 11 on the sagittal plane (for example, when the projection shape is a rectangle or an approximate rectangle, the short axis direction is the width direction of the rectangle or the approximate rectangle). The thickness direction X can be defined as a direction perpendicular to the two-dimensional projection surface, for example, consistent with the direction of the coronal axis, both pointing to the left and right directions of the body. In some embodiments, when the sound-emitting part 11 is in a tilted state in the wearing state, the long axis direction Y and the short axis direction Z are still parallel or approximately parallel to the sagittal plane, and the long axis direction Y can have a certain angle with the direction of the sagittal axis, that is, the long axis direction Y is also tilted accordingly, and the short axis direction Z can have a certain angle with the direction of the vertical axis, that is, the short axis direction Z is also tilted, such as Figure 2 The sound generating part 11 shown is worn on 11B and Figure 4 In some embodiments, the whole or part of the structure of the sound-generating part 11 can extend into the concha cavity, that is, the projection of the sound-generating part 11 on the sagittal plane overlaps with the projection of the concha cavity on the sagittal plane. For details about how the sound-generating part 11 is worn on 11B, please refer to other parts of this specification, for example, Figure 3 In some embodiments, the sound-emitting portion 11 may also be in a horizontal state or a nearly horizontal state when worn, such as Figure 2 The sound-producing part 11 is worn on 11C and Figure 3 As shown in the sound-emitting part 11, the long axis direction Y can be consistent or approximately consistent with the direction of the sagittal axis, both pointing to the front and back direction of the body, and the short axis direction Z can be consistent or approximately consistent with the direction of the vertical axis, both pointing to the up and down direction of the body. It should be noted that when the sound-emitting part 11 is in a nearly horizontal state when worn, it can refer to Figure 2 The angle between the long axis of the sound-emitting part 11 and the sagittal axis is within a specific range (for example, not more than 20°). Figure 2 11A, 11B and 11C shown in FIG. satisfy Figure 1 For example, the entire or partial structure of the sound-emitting part 11 may be located at Figure 1The area J is surrounded by the dotted line. For another example, the whole or part of the structure of the sound-generating part 11 may be in contact with the position where one or more parts of the external auditory canal 101, such as the crus helix 109, the cymba concha 103, the triangular fossa 104, the antihelix 105, the scaphoid 106, and the helix 107, are located. For another example, the whole or part of the structure of the sound-generating part 11 may be located in a cavity (for example, the concha cavity 102, the cymba concha 103, the triangular fossa 104, etc.) formed by one or more parts of the ear 100. Figure 1 The middle dotted line encloses an area M1 that includes at least the cymba concha 103 and the triangular fossa 104 and an area M2 that includes at least the cavum concha 102).

[0069] In some embodiments, in order to improve the stability of the open earphone 10 in the wearing state, the open earphone 10 can adopt any one of the following methods or a combination thereof. For example, at least a portion of the ear hook 12 is configured as a contoured structure that fits at least one of the back side of the ear and the head, so as to increase the contact area between the ear hook 12 and the ear and / or the head, thereby increasing the resistance of the open earphone 10 to fall off the ear. For example, at least a portion of the ear hook 12 is configured as an elastic structure so that it has a certain amount of deformation in the wearing state, so as to increase the positive pressure of the ear hook 12 on the ear and / or the head, thereby increasing the resistance of the open earphone 10 to fall off the ear. For example, at least a portion of the ear hook 12 is configured to abut against the head in the wearing state, so as to form a reaction force that presses the ear, so that the sound-emitting portion 11 is pressed against the front side of the ear, thereby increasing the resistance of the open earphone 10 to fall off the ear. For example, the sound-emitting part 11 and the ear hook 12 are configured to clamp the physiological parts such as the area where the antihelix is ​​located and the area where the cavum concha is located from the front and back sides of the ear in the wearing state, thereby increasing the resistance of the open earphone 10 to fall off from the ear. For another example, the sound-emitting part 11 or the auxiliary structure connected thereto is configured to at least partially extend into the cavum concha, the cymba concha, the triangular fossa and the scaphoid, thereby increasing the resistance of the open earphone 10 to fall off from the ear.

[0070] The sound-emitting part 11 may have a connection end CE connected to the ear hook 12 and a free end FE not connected to the ear hook 12. Figure 4, in the wearing state, the free end FE of the sound-emitting part 11 can extend into the concha cavity. Optionally, the sound-emitting part 11 and the ear hook 12 can be configured to clamp the aforementioned ear area from the front and back sides of the ear area corresponding to the concha cavity, thereby increasing the resistance of the open-type earphone 10 to fall off the ear, thereby improving the stability of the open-type earphone 10 in the wearing state. For example, the free end FE of the sound-emitting part is pressed in the concha cavity in the thickness direction X. For another example, the free end FE abuts in the concha cavity in the major axis direction Y and / or the minor axis direction Z (for example, abuts against the inner wall of the concha cavity relative to the free end FE). Among them, the free end FE of the sound-emitting part 11 refers to the end of the sound-emitting part 11 that is arranged opposite to the fixed end connected to the ear hook 12. The sound-emitting part 11 can be a regular or irregular structure. Here, an exemplary description is given to further illustrate the free end FE of the sound-emitting part 11. For example, when the sound-emitting part 11 is a rectangular parallelepiped structure, the end wall surface of the sound-emitting part 11 is a plane, and the free end FE of the sound-emitting part 11 is an end side wall of the sound-emitting part 11 that is arranged opposite to the fixed end connected to the ear hook 12. For another example, when the sound-emitting part 11 is a sphere, an ellipsoid or an irregular structure, the free end FE of the sound-emitting part 11 may refer to a specific area away from the fixed end obtained by cutting the sound-emitting part 11 along the YZ plane (the plane formed by the short axis direction Z and the thickness direction X). It should be noted that: in the wearing state, in addition to extending into the concha cavity, the free end FE of the sound-emitting part 11 may also be projected onto the antihelix, or onto the left and right sides of the head and located on the front side of the ear on the sagittal axis of the human body. In other words, the ear hook 12 can support the sound-emitting part 11 to be worn in the concha cavity, the antihelix, the front side of the ear and other wearing positions.

[0071] The following Figure 4 Taking the open earphone 10 shown in the figure as an example, the open earphone 10 is described in detail. It should be noted that, without violating the corresponding acoustic principle, Figure 4 The structure of the open-type earphone 10 and its corresponding parameters can also be applied to the open-type earphones of other configurations mentioned above.

[0072] By extending at least part of the sound-emitting part 11 into the concha cavity, the listening volume at the listening position (for example, at the opening of the ear canal), especially the listening volume of the mid-low frequency, can be increased, while still maintaining a good far-field sound leakage cancellation effect. As an exemplary illustration only, when the entire or partial structure of the sound-emitting part 11 is extended into the concha cavity, the sound-emitting part 11 and the concha cavity form a structure similar to a cavity (hereinafter referred to as a quasi-cavity). In the embodiments of the specification, the quasi-cavity can be understood as a semi-enclosed structure surrounded by the side walls of the sound-emitting part 11 and the concha cavity structure. The semi-enclosed structure is not completely sealed and isolated from the external environment, but has a leakage structure (for example, an opening, a gap, a pipe, etc.) that is acoustically connected to the external environment. When the user wears the open-ear earphone 10, one or more sound outlet holes may be provided on the shell of the sound-emitting portion 11 on a side close to or facing the user's ear canal, and one or more pressure relief holes may be provided on other side walls of the shell of the sound-emitting portion 11 (for example, side walls away from or facing away from the user's ear canal). The sound outlet holes are acoustically coupled to the front cavity of the open-ear earphone 10, and the pressure relief holes are acoustically coupled to the back cavity of the open-ear earphone 10. Taking the sound-emitting portion 11 including a sound outlet hole and a pressure relief hole as an example, the sound output by the sound outlet hole and the sound output by the pressure relief hole can be approximately regarded as two sound sources, and the sound waves of the two sound sources are in opposite phases. The sound-emitting portion 11 and the inner wall corresponding to the concha cavity form a cavity-like structure, wherein the sound source corresponding to the sound outlet hole is located inside the cavity-like structure, and the sound source corresponding to the pressure relief hole is located outside the cavity-like structure, forming a Figure 5 The acoustic model shown.

[0073] Figure 5 FIG. 1 is an exemplary distribution diagram of a cavity structure arranged around one of the dual sound sources shown in some embodiments of this specification. Figure 5As shown, the cavity-like structure 502 may include a listening position and at least one sound source 501A. Here, "include" may mean that at least one of the listening position and the sound source 501A is inside the cavity-like structure 502, or at least one of the listening position and the sound source 501A is at the inner edge of the cavity-like structure 502. The listening position may be equivalent to the entrance of the ear canal, or may be an acoustic reference point of the ear, such as the ear reference point (ERP), the ear-drum reference point (DRP), etc., or may be an entrance structure leading to the listener, etc. Since the sound source 501A is wrapped by the cavity-like structure 502, most of the sound radiated by it will reach the listening position by direct or reflected means. Relatively speaking, in the absence of the cavity-like structure 502, most of the sound radiated by the sound source 501A will not reach the listening position. Therefore, the setting of the cavity structure significantly improves the volume of the sound reaching the listening position. At the same time, only a small part of the anti-phase sound radiated by the anti-phase sound source 501B outside the cavity-like structure 502 will enter the cavity-like structure 502 through the leakage structure 503 of the cavity-like structure 502. This is equivalent to generating a secondary sound source 501B' at the leakage structure 503, whose intensity is significantly smaller than that of the sound source 501B and also significantly smaller than that of the sound source 501A. The sound generated by the secondary sound source 501B' has a weak anti-phase cancellation effect on the sound source 501A in the cavity, which significantly increases the listening volume at the listening position. For leakage sound, the sound source 501A radiating sound to the outside through the leakage structure 503 of the cavity is equivalent to generating a secondary sound source 501A' at the leakage structure 503. Since almost all the sound radiated by the sound source 501A is output from the leakage structure 503, and the scale of the cavity-like structure 502 is much smaller than the spatial scale of the evaluation leakage sound (at least one order of magnitude difference), it can be considered that the intensity of the secondary sound source 501A' is equivalent to that of the sound source 501A. For the external space, the secondary sound source 501A' and the sound source 501B form a dual sound source to cancel each other out and reduce leakage sound.

[0074] In a specific application scenario, the outer wall surface of the shell of the sound-emitting part 11 is usually a plane or a curved surface, and the contour of the user's concha cavity 102 is an uneven structure. By extending part or all of the sound-emitting part 11 into the concha cavity, a cavity-like structure connected to the outside is formed between the sound-emitting part 11 and the contour of the concha cavity. Furthermore, the sound outlet hole is arranged at a position where the shell of the sound-emitting part 11 faces the user's ear canal opening and close to the edge of the concha cavity 102, and the pressure relief hole is arranged at a position where the sound-emitting part 11 is away from or far away from the ear canal opening. Figure 5 The acoustic model shown enables the user to improve the listening position at the ear opening when wearing the open earphone 10, and reduce the sound leakage effect in the far field.

[0075] Figure 6 Schematic diagram of the exemplary internal structure of the sound-generating part according to some embodiments of this specification. Figure 6 As shown, in some embodiments, the sound-emitting part 11 may include a transducer 112 and a housing 111 for accommodating the transducer 112, and the transducer 112 may include a diaphragm 1121. A front cavity 114 located at the front side of the diaphragm 1121 and a rear cavity 116 located at the rear side of the diaphragm 1121 may be formed between the diaphragm 1121 and the housing 111. The housing 111 is provided with a sound outlet hole 111a acoustically coupled to the front cavity 114 and a pressure relief hole acoustically coupled to the rear cavity 116 (for example, a first pressure relief hole 111c and a second pressure relief hole 111d, wherein the second pressure relief hole 111d is not in the housing 111). Figure 6 ). A connecting frame 115 may be provided in the housing 111. An acoustic channel 1151 is provided on the connecting frame 115 for connecting the first pressure relief hole 111c and the rear cavity 116, so that the rear cavity 116 is connected to the external environment, that is, air can freely enter and exit the rear cavity 116, which is conducive to reducing the resistance of the diaphragm of the transducer 112 during the vibration process.

[0076] Figure 7 is an exemplary appearance diagram of a transducer according to some embodiments of this specification, Figure 8 is an exemplary exploded view of a transducer according to some embodiments of the present specification. Figure 7 and Figure 8 In some embodiments, the sound-emitting part 11 may include a diaphragm 1121, a coil 1122, a bracket 1123, a terminal 1124, and a magnetic circuit assembly 1125. Among them, the bracket 1123 provides a mounting and fixing platform, the speaker 112 can be connected to the housing 111 through the bracket 1123, the terminal 1124 is fixed to the bracket 1123, and the terminal 1124 can be used for circuit connection (for example, connecting leads, etc.). The coil 1122 is connected to the diaphragm 1121 and is at least partially located in the magnetic gap formed by the magnetic circuit assembly 1125. The magnetic circuit assembly 1125 will generate a force on the energized coil 1122, thereby driving the diaphragm 1121 to generate mechanical vibration, and then generate sound through the propagation of a medium such as air. The magnetic circuit assembly 1125 may include a magnetic conductive plate 11251, a magnet 11252, and a receiving member 11253. The magnetic conductive plate 11251 is located between the magnet 11252 and the diaphragm 1121 and is attached to the surface of the magnet 11252 .

[0077] Fig. 9 is an exemplary internal structure diagram of the sound-producing part according to some embodiments of this specification, Fig.10It is an exemplary structural diagram of the diaphragm shown in some embodiments of this specification. The sound-emitting part 11 includes a diaphragm 1121, a coil 1122, a bracket 1123 and a magnetic circuit assembly 1125. Among them, the bracket 1123 is arranged around the diaphragm 1121, the coil 1122 and the magnetic circuit assembly 1125 to provide an installation and fixing platform. The sound-emitting part 11 can be connected to the shell 111 through the bracket 1123, and the coil 1122 extends into the magnetic circuit assembly 1125 and is connected to the diaphragm 1121. The magnetic circuit assembly 1125 will generate a force on the energized coil 1122, thereby driving the diaphragm 1121 to generate mechanical vibration, and then generate sound through the propagation of a medium such as air, and the sound is output through the sound outlet. In some embodiments, the magnetic circuit assembly 1125 includes a magnetic conductive plate 11251, a magnet 11252 and a container 11253. The magnetic conductive plate 11251 and the magnet 11252 are connected to each other. The side of the magnet 11252 away from the magnetic conductive plate 11251 is installed on the bottom wall of the container 11253, and there is a gap between the peripheral side of the magnet 11252 and the peripheral inner wall of the container 11253. In some embodiments, the peripheral outer wall of the container 11253 is connected and fixed to the bracket 1123. In some embodiments, both the container 11253 and the magnetic conductive plate 11251 can be made of magnetic conductive materials (such as iron, etc.). In some embodiments, the peripheral side of the diaphragm 1121 can be connected to the bracket 1123 through a fixing ring 1155. In some embodiments, the material of the fixing ring 1155 can include stainless steel or other metal materials to adapt to the processing and manufacturing process of the diaphragm 1121. Please refer to Figure 8 , the magnetic circuit assembly 1125 may include a magnetic conductive plate 11251, a magnet 11252 and a container 11253. The container 11253 and the magnetic conductive plate 11251 may both be made of magnetic conductive materials (such as iron, etc.). In some embodiments, the container 11253 includes a bottom 11253a of the container and a side wall 11253b on the peripheral side. The bottom 11253a and the side wall 11253b of the container form a containing space, and the magnetic conductive plate 11251 and the magnet 11252 are contained in the containing space. The magnetic conductive plate 11251 and the magnet 11252 are connected to each other, and the side of the magnet 11252 away from the magnetic conductive plate 11251 is installed on the bottom 11253a of the container, and there is a gap between the peripheral side of the magnet 11252 and the side wall 11253b on the peripheral side of the container 11253. In some embodiments, the coil 1122 can extend into the gap between the magnet 11252 and the side wall 11253b.

[0078] In some embodiments, in order to allow at least part of the coil 1122 to be located in a region with a high magnetic flux density in the magnetic circuit assembly 1125 during the up and down vibration of the diaphragm 1121, so as to improve the magnetic field utilization efficiency of the magnetic circuit assembly 1125, in the vibration direction of the diaphragm 1121, the distance dd between the center point J of the coil 1122 and the center point K of the magnetic conductive plate 11251 is less than 0.3 mm. For example, the center point J of the coil 1122 and the center point K of the magnetic conductive plate 11251 can be substantially on the same horizontal line, so that the magnetic circuit assembly 1125 generates a greater force on the coil 1122 to provide power for the vibration of the diaphragm 1121.

[0079] Please refer to Fig. 9 and Fig.10 In some embodiments, the diaphragm 1121 may include a main body region 11211 and a folding ring region 11212 disposed around the main body region 11211. In some embodiments, the main body region 11211 includes a first inclined section 11211a and a first connecting section 11211b connected to the coil 1122. Fig. 9 As shown, the first connecting section 11211b is used to connect the coil 1122. The first connecting section 11211b is arranged parallel to the short axis direction Z and perpendicular to the vibration direction of the diaphragm. The first inclined section 11211a is in contact with a part of the folding ring area 11212. In some embodiments, the first inclined section 11211a is inclined relative to the first connecting section 11211b in a direction away from the coil 1122. Fig. 9 and Fig.10 As shown, the coil 1122 is located at the lower side of the first connecting section 11211b, and the first inclined section 11211a is inclined upward relative to the first connecting section 11211b (i.e., away from the direction away from the coil 1122). Through the above arrangement, it is possible to prevent the glue used for bonding from overflowing to the folding ring area 11212 when the coil 1122 is bonded to the diaphragm 1121, causing the glue to corrode the folding ring area 11212, thereby affecting the vibration performance of the diaphragm 1121.

[0080] In some embodiments, the magnetic circuit system 1125 mainly includes a magnetic conductive plate 11251, a magnet 11252 and a container 11253. The magnetic conductive plate 11251 and the magnet 11252 are connected to each other. The side of the magnet 11252 away from the magnetic conductive plate 11251 is installed on the bottom wall of the container 11253, and there is a gap between the peripheral side of the magnet 11252 and the inner side wall of the peripheral side of the container 11253. The coil 1122 can extend into the gap between the magnet 11252 and the container 11253. If the distance between the coil 1122 and the side wall of the container 11253 is too large, the coil will not be in the area with a large magnetic flux density of the magnetic circuit component 1125, which will weaken the power provided by the magnetic circuit component 1125 to the diaphragm 1121; if the distance is too small, the coil 1121 will have the risk of colliding with the container 11253. Therefore, in order to avoid the collision of the coil 1121 and ensure that the magnetic field provides power to the diaphragm 1121, in some embodiments, in the above-mentioned gap, the distance wt between the coil 1122 and the side wall of the magnet 11252 can be 0.1mm-0.25mm, and the distance ww between the coil 1122 and the inner side wall of the peripheral side of the container 11253 can be 0.1mm-0.5mm. In some embodiments, the distance wt between the coil 1122 and the side wall of the magnet 11252 can be 0.12mm-0.24mm, and the distance ww between the coil 1122 and the inner side wall of the peripheral side of the container 11253 can be 0.15mm-0.3mm. In some embodiments, in the above-mentioned gap, the distance wt between the coil 1122 and the side wall of the magnet 11252 can be 0.17mm-0.21mm, and the distance ww between the coil 1122 and the inner side wall of the peripheral side of the container 11253 can be 0.19mm-0.23mm. In some embodiments, the distance wt between the coil 1122 and the side wall of the magnet 11252 may be 0.2 mm, and the distance ww between the coil 1122 and the inner side wall of the circumferential side of the container 11253 may be 0.2 mm. If the distance h3 between the coil 1122 and the bottom 11253a of the container 11253 is too large, the volume of the entire sound-emitting part 11 will increase. If the distance h3 between the coil 1122 and the bottom 11253a of the container 11253 is too small along the vibration direction of the diaphragm 1121, the coil 1121 may have the risk of colliding with the container 11253. Therefore, in order to avoid the volume of the sound-emitting part 11 being too large and the collision of the coil 1121, in some embodiments, the distance h3 between the coil 1122 and the bottom 11253a of the container 11253 (i.e., the distance between the end of the coil 1122 away from the diaphragm 1121 and the bottom wall of the container 11253) may be 0.2 mm-4 mm. In some embodiments, the distance h3 between the coil 1122 and the bottom wall of the receiving member 11253 can be 0.6 mm-3 mm.In some embodiments, the distance h3 between the coil 1122 and the bottom wall of the container 11253 may be 1 mm to 2 mm. In some embodiments, the distance h3 between the coil 1122 and the bottom wall of the container 11253 may be 1.4 mm to 1.6 mm.

[0081] In some embodiments, by designing the inclination angle β of the first inclined section 11211a relative to the first connecting section 11211b, the relative position of the coil 1122 and the magnetic circuit assembly 1125 can be changed, so that the thrust received by the coil 1122 is roughly consistent, thereby adjusting the low-frequency distortion of the sound-emitting part 11 and making the low-frequency hearing richer. In addition, by designing the inclination angle β of the first inclined section 11211a relative to the first connecting section 11211b, it is also possible to prevent the coil 1122 from overflowing from the glue to the folding ring area 11212, thereby preventing the folding ring area 11212 from corroding and affecting the vibration of the folding ring area 11212. Among them, the inclination angle β of the first inclined section 11211a relative to the first connecting section 11211b refers to the angle between the first inclined section 11211a and the straight line where the first connecting section 11211b is located in the direction away from the first connecting section 11211b, such as Fig.10 shown.

[0082] In some embodiments, in order to reduce the degree of distortion of the sound-emitting portion 11, avoid corrosion of the folding ring area 11212 and affect the vibration of the folding ring area 11212, the inclination angle β of the first inclined section 11211a relative to the first connecting section 11211b can be in the range of 5°-30°. In some embodiments, in order to further reduce the degree of distortion of the sound-emitting portion 11, the inclination angle β of the first inclined section 11211a relative to the first connecting section 11211b can be in the range of 10°-25°. For example, the inclination angle β of the first inclined section 11211a relative to the first connecting section 11211b can be 15°. For another example, the inclination angle β of the first inclined section 11211a relative to the first connecting section 11211b can be 22°.

[0083] In some embodiments, the minimum distance between the coil 1122 and the first inclined section 11212a is not less than 0.3 mm, that is, the distance between the connection point between the first inclined section 11212a and the first connecting section 11211b and the connection area between the coil 1122 and the first connecting section 11211b is not less than 0.3 mm, so that the folding ring area 11212 and the installation position of the coil 1122 maintain a safe distance to prevent the glue used to install the coil 1122 from overflowing into the folding ring area 11212.

[0084] In some embodiments, the folding ring area 11212 includes a second inclined section 11212a, and the second inclined section 11212a is at least partially attached to the first inclined section 11211a. The main body area 11211 and the folding ring area 11212 are connected through the first inclined section 11211a and the second inclined section 11212a. In some embodiments, in order to simplify the mounting process, the first inclined section 11211a and the second inclined section 11212a can be connected by glue. In some embodiments, in order to achieve the connection between the main body area 11211 and the folding ring area 11212, the second inclined section 11212a can be arranged on the side of the first inclined section 11211a close to the coil 1122. In some embodiments, in order to achieve the connection between the main body area 11211 and the folding ring area 11212, and at the same time to further reduce the degree of corrosion of the folding ring area 11212 by the glue when the coil 1122 is bonded, the second inclined section 11212a can be arranged on the side of the first inclined section 11211a away from the coil 1122.

[0085] Since the vibration amplitude of the diaphragm 1121 is large at low frequencies, if the folding ring area 11212 adopts a planar structure, its deformation ability is poor, which will affect the vibration amplitude of the diaphragm 1121. Therefore, in order to make the diaphragm 1121 have better deformation ability, in some embodiments, the folding ring area 11212 may include an arc segment 11212c.

[0086] In some embodiments, the ratio of the height h1 to the span w1 of the arc segment 11212c may affect the deformation capability of the arc segment 11212c. The height of the arc segment 11212c refers to the distance between the highest point and the lowest point of the arc segment 11212c in the vibration direction of the diaphragm 1121. Fig.10 As shown, the height of the arc segment 11212c is denoted as h1. The span of the arc segment 11212c refers to the maximum distance between two upper points of the arc segment 11212c. Fig.10As shown, the span of the arc segment 11212c is recorded as w1. If the ratio of the height h1 of the arc segment 11212c to the span w1 is too small, the convexity of the arc segment 11212c is too small, and the shape may be close to a planar structure with poor deformation ability. If the ratio of the height h1 of the arc segment 11212c to the span w1 is too large, the convexity of the arc segment 11212c is too large, and the vibration of the diaphragm 1121 is greatly hindered, which affects the output of the sound-emitting part 11. Therefore, in some embodiments, in order to make the sound-emitting part 11 have better output and lower distortion, the ratio of the height h1 of the arc segment 11212c to the span w1 can be in the range of 0.35-0.4. In some embodiments, in order to further improve the output of the sound-emitting part 11, the ratio of the height h1 of the arc segment 11212c to the span w1 can be in the range of 0.36-0.39. In some embodiments, in order to further reduce the distortion of the sound-emitting portion 11, the ratio of the height h1 of the arc segment 11212c to the span w1 may be 0.37-0.38. For example, the ratio of the height h1 of the arc segment 11212c to the span w1 may be 0.38.

[0087] In some embodiments, the height h1 of the arc segment 11212c may be in the range of 0.5mm-0.7mm. For example, the height h1 of the arc segment 11212c may be in the range of 0.55mm-0.65mm. In some embodiments, the height h1 of the arc segment 11212c may be 0.6mm. Taking into account the error size, in some embodiments, the height h1 of the arc segment 11212c may be 0.6mm±0.05mm. In some embodiments, the span (width) w2 of the arc segment 11212c of the folding ring area 11212 may be less than twice the radius of curvature r1. In some embodiments, the radius of curvature r1 of the arc segment 11212c of the folding ring area 11212 may be 0.7mm-0.9mm. In some embodiments, the radius of curvature r1 of the arc segment 11212c of the folding ring area 11212 may be 0.75mm-0.88mm. In some embodiments, the radius of curvature r1 of the arc segment 11212c of the folding ring area 11212 may be 0.8mm-0.83mm. In some embodiments, the span w1 of the arc segment 11212c of the folding ring area 11212 may be 1.2mm-1.7mm. In some embodiments, the span w1 of the arc segment 11212c of the folding ring area 11212 may be 1.3mm-1.65mm. In some embodiments, the span w1 of the arc segment 11212c of the folding ring area 11212 may be 1.5mm-1.6mm. In some embodiments, the radius of curvature r1 of the arc segment 11212c of the folding ring area 11212 may be 0.82mm, and the span w1 of the arc segment 11212c of the folding ring area 11212 may be 1.58mm. Taking the error size into consideration, in some embodiments, the radius of curvature r1 of the arc segment 11212c of the folding ring area 11212 may be 0.82 mm±0.05 mm, and the span w1 of the arc segment 11212c of the folding ring area 11212 may be 1.58 mm±0.1 mm.

[0088] In some embodiments, the folding ring area 11212 may also include a wavy structure composed of a plurality of arc segments 11212c, wherein any two adjacent arc segments 11212c face opposite directions. The arrangement of the wavy structure may make the degree of obstruction encountered by the diaphragm 1121 in the upward and downward vibrations as symmetrical as possible during the vibration process, reduce the degree of distortion of the sound-emitting portion 11, and improve the low-frequency output of the sound-emitting portion 11. In some embodiments, the ratio of the height to the span of each arc segment 11212c in the plurality of arc segments 11212c may be consistent with the ratio of the height to the span of the above-mentioned single arc segment 11212c. In some embodiments, the ratio of the height to the span of each arc segment 11212c in the plurality of arc segments 11212c may be different. For example, along the radial direction of the diaphragm 1121, the height of each arc segment 11212c in the plurality of arc segments 11212c may gradually decrease from the center to the edge of the diaphragm 1121, and the span of each arc segment 11212c is the same.

[0089] In order to constrain the diaphragm 1121 when it vibrates greatly and prevent the coil 1122 from hitting the magnetic circuit assembly 1125, in some embodiments, the main body region 11211 may include an arched spherical top 11211c located at one end of the first connecting section 11211b away from the first inclined section 11211a, and the arched spherical top 11211c and the arc section 11212c have the same arching direction, that is, the arched spherical top 11211c protrudes toward the side away from the coil 1122. The arched spherical top 11211c can prevent the diaphragm 1121 from shaking when it vibrates greatly, ensuring that the coil 1122 and the magnetic assembly 1125 will not collide. At the same time, the arched spherical top 11211c also has high strength and rigidity, which can suppress the split vibration of the main body region 11211 to a certain extent, thereby improving the high-frequency vibration characteristics of the transducer 112. In the absence of a front cover, the dome aspect ratio (i.e., the ratio of height to span) increases, and the high-frequency bandwidth increases, but an excessively high dome aspect ratio will result in increased unevenness and an increase in overall size.

[0090] In some embodiments, the height h2 of the dome 11211c is related to the dimension of the dome 11211c in the arch extension direction (i.e., the span dimension w2). The height of the dome 11211c refers to the distance between the highest point of the dome 11211c and the lowest point of the dome 11211c (i.e., the end point connected to the first connecting section 11211b) in the vibration direction of the diaphragm 1121. Fig.10 As shown, the height of the dome 11211c is h2. The span of the dome 11211c refers to the maximum distance between two upper points of the dome 11211c. Fig.10As shown, the span of the dome 11211c is w2. The larger the span w2 of the dome 11211c, the larger the height h2 of the dome 11211c will be in order to maintain the arched structure of the dome 11211c (for example, so that the curvature corresponding to the dome 11211c remains within the preset curvature range), which may cause the overall thickness of the transducer 112 to be too large. Taking into account the overall thickness and structural design of the transducer 112, in some embodiments, the preset curvature range corresponding to the dome 11211c of the main body area 11211 of the diaphragm 1121 may be 0.5263rad-3.1416rad. In some embodiments, the preset curvature range corresponding to the dome 11211c of the main body area 11211 of the diaphragm 1121 may be 0.7869rad-3.1416rad. In some embodiments, the preset curvature range corresponding to the dome 11211c of the main body region 11211 of the diaphragm 1121 may be 1.0526rad-3.1416rad. In some embodiments, the preset curvature range corresponding to the dome 11211c of the main body region 11211 of the diaphragm 1121 may be 1.5789rad-3.1416rad. In some embodiments, the preset curvature range corresponding to the dome 11211c of the main body region 11211 of the diaphragm 1121 may be 2.1053rad-3.1416rad. In some embodiments, the preset curvature range corresponding to the dome 11211c of the main body region 11211 of the diaphragm 1121 may be 2.6316rad-3.1416rad. In some embodiments, the width dimension w2 of the dome 11211c of the main body region 11211 may be 2mm-8mm. In some embodiments, the width dimension w2 of the dome 11211c of the main body region 11211 may be 3mm-7mm. In some embodiments, the width dimension w2 of the dome 11211c of the main body region 11211 may be 4mm-6mm. In some embodiments, the width dimension w2 of the dome 11211c of the main body region 11211 may be 4.8mm. In some embodiments, the height h2 of the dome 11211c of the main body region 11211 (i.e., the distance between the highest point and the lowest point of the dome 11211c in the vibration direction of the diaphragm) may range from 0.7mm to 1.2mm. In some embodiments, the height h2 of the dome 11211c of the main body region 11211 may be 0.9mm-1.1mm. In some embodiments, the height h2 of the dome 11211c of the main body region 11211 may be 1mm-1.05mm. In some embodiments, the height h2 of the dome 11211c of the main body region 11211 may be 0.8mm. In some embodiments, due to processing errors, the height h2 of the spherical top 11211c of the main body region 11211 may be 0.8 mm±0.08 mm.

[0091] In some embodiments, the ratio of the height h2 of the dome 11211c to the span w2 may affect the overall size of the sound-emitting portion 11 and the vibration of the diaphragm 1121. If the ratio of the height h2 of the dome 11211c to the span w2 is too small, the protrusion of the dome 11211c is too small, the shape of the dome 11211c is close to a planar structure, the strength and rigidity of the dome 11211c are low, and the dome 11211c is prone to split vibration, resulting in more peaks and valleys in the high-frequency region, affecting the high-frequency vibration characteristics of the transducer 112. If the ratio of the height h2 of the dome 11211c to the span w2 is too large, the protrusion of the dome 11211c is too large, the overall thickness of the transducer 112 may be too large, and the unevenness and overall size will also increase. Therefore, in order to make the sound-emitting part 11 have an appropriate thickness as a whole and improve the high-frequency vibration characteristics of the sound-emitting part 11, the ratio of the height h2 of the dome 11211c to the span w2 can be in the range of 0.1-0.6. In some embodiments, in order to further improve the high-frequency vibration characteristics of the transducer 112, the ratio of the height h2 of the dome 11211c to the span w2 can be in the range of 0.1-0.4. In some embodiments, in order to further improve the high-frequency vibration characteristics of the transducer 112, the ratio of the height h2 of the dome 11211c to the span w2 can be in the range of 0.1-0.3.

[0092] In some embodiments, taking into account the structural strength, the difficulty of process implementation, and the overall thickness limit of the sound-emitting portion 11, while satisfying the maximum amplitude of the diaphragm 1121, so that the diaphragm 1121 does not collide with the magnetic conductive plate 11251 during the vibration process, in the vibration direction of the diaphragm, the distance between the lowest point of the spherical top 11211c of the main area 11211 of the diaphragm 1121 and the top of the magnetic conductive plate 11251 in the magnetic circuit assembly 1125 (such as Fig. 9 The distance hd shown can be greater than 0.8 mm. In some embodiments, the distance hd between the lowest point of the spherical top 11211c of the main body area 11211 of the diaphragm 1121 and the top of the magnetic conductive plate 11251 in the magnetic circuit system 1125 can be 0.85 mm-0.95 mm, that is, 0.9 mm ± 0.05 mm. Among them, 0.9 mm is the structural dimension, and 0.05 mm is the error range dimension. In some embodiments, the distance hd between the lowest point of the spherical top 11211c of the main body area 11211 of the diaphragm 1121 and the top of the magnetic conductive plate 11251 in the magnetic circuit system 1125 can be 0.86 mm-0.93 mm. In some embodiments, the distance hd between the lowest point of the spherical top 11211c of the main body area 11211 of the diaphragm 1121 and the top of the magnetic conductive plate 11251 in the magnetic circuit system 1125 can be 0.88 mm-0.92 mm.

[0093] Fig.11Ais a schematic diagram of an exemplary high-frequency bandwidth of a sound-producing part according to some embodiments of this specification. Fig.11A As shown in FIG. 1 , in the frequency response curve of the sound-emitting part 11, there is a first inflection point f0 in the low-frequency region, and f0 is approximately around 300 Hz. f0 is related to the hardness and softness of the folding area 11212 of the diaphragm 1121 and the vibration weight (mainly the weight of the main body area 11211). The second inflection point f h is around 25kHz, f h It can be determined based on the overall trend of the frequency response curve. h =25kHz, although the curve has a small peak locally, it shows a downward trend overall. h The peak values ​​of the frequency band between 300 Hz and 25 kHz are averaged to form the first reference line L. m ,like Fig.11A The straight line in the middle upper part, with this reference straight line drops 10dB, forming the second straight line L n ( Fig.11A The selected bandwidth is 100Hz-45kHz.

[0094] In some embodiments, the frequency of the high-frequency split vibration of the diaphragm 1121 is proportional to E / ρ. Wherein, E is the Young's modulus of the diaphragm 1121, and ρ is the equivalent density of the diaphragm 1121. Therefore, E / ρ can determine the bandwidth of the high frequency. When E is constant, the smaller the mass of the diaphragm 1121, the smaller the equivalent density ρ of the diaphragm 1121, the larger the E / ρ, and the wider the high-frequency bandwidth. When ρ is constant, the larger the Young's modulus E of the diaphragm 1121, the larger the E / ρ, the larger the high-frequency split vibration frequency of the diaphragm 1121, and the wider the high-frequency bandwidth.

[0095] In some embodiments, the high-frequency segmented vibration region of the sound-emitting part 11 refers to the region where the frequency response curve drops sharply and alternately shows peaks and valleys after reaching the highest peak. Fig.11A As shown, the frequency response curve reaches the highest peak (i.e. f h The corresponding sound pressure level) after that, the frequency response drops sharply and the peak and valley values ​​appear alternately. h The area on the right is the high-frequency segmentation vibration area. The frequency at which the corresponding curve reaches the highest peak is the frequency at which high-frequency segmentation vibration occurs (e.g. Fig.11A The f h). In some embodiments, in order to avoid large differences in vibrations of different parts in the main area 11211, resulting in poor high-frequency effects, the frequency of the high-frequency segmentation vibration of the main area 11211 (dome 11211c) can be designed so that the diaphragm 1121 has a wider high-frequency bandwidth while reducing the occurrence of high-frequency segmentation vibrations in the bandwidth area. In some embodiments, the frequency of the high-frequency segmentation vibration of the dome 11211c can be no less than 20kHz. For example, the frequency of the high-frequency segmentation vibration of the dome 11211c can be no less than 25kHz. In some embodiments, in order to ensure that the output of the main area 11211 in the effective frequency band is high, the mass of the main area 11211 needs to be small to reduce the vibration difficulty of the main area 11211 in the effective frequency band. Therefore, the material of the main area 11211 can be selected from materials and structures with lower density and higher strength. Therefore, the Young's modulus of the dome 11211c can be no less than 6GPa. In some embodiments, the Young's modulus of the dome 11211c can be in the range of 6GPa-7GPa. For example, the Young's modulus of the spherical top 11211c may be 6.5 GPa. The Young's modulus of the spherical top 11211c may be measured by a static method or a dynamic method (eg, a pulse excitation method, an acoustic resonance method, a sound velocity method, etc.).

[0096] In some embodiments, the main body area 11211 can be made of carbon fiber material. Fig. 11B It is a schematic diagram of the weaving structure of exemplary carbon fibers shown in some embodiments of this specification. The carbon fiber material has a low density and high strength, which is beneficial for weakening the high-order modes of the speaker 112. In some embodiments, in order to further increase the strength of the main body area 11211 and reduce the equivalent density of the main body area 11211, the main body area 11211 can be formed by interlacing carbon fibers, and at least part of the carbon fibers are interlaced at a first angle. In some embodiments, the first angle is in the range of 45°-90°. For example, the weaving of multiple independent carbon fibers can be interlaced at any angle such as 45°, 60°, 90°, etc. Fig. 11BAs shown, multiple carbon fibers 112111 and multiple 112112 can be interlaced and woven at an angle close to 90°. In some embodiments, since the carbon fibers are very thin, multiple carbon fibers 112111 and multiple 112112 can be laid at an angle close to 90° and connected by gluing. In some embodiments, the main body area 11211 may include a structure of interlaced weaving of multiple layers (e.g., 2 layers, 3 layers, etc.) of carbon fibers. In order to facilitate the interlaced weaving of carbon fibers, in some embodiments, the length of a single carbon fiber is not less than 5 mm. In some embodiments, the length of a single carbon fiber can be in the range of 5 mm-10 mm. For example, the length of a single carbon fiber can be 7 mm. Because a single carbon fiber is too thin, it is difficult to weave one by one and it is not easy to achieve. In some embodiments, multiple carbon fibers can be laid and connected together (e.g., connected by gluing, etc.) to form multiple groups of carbon fibers, and the multiple groups of carbon fibers are interlaced and woven in warp and weft.

[0097] In some embodiments, in order to reduce the weight of the main body region 11211, the thickness of the main body region 11211 using the super aligned carbon fiber structure can be designed to obtain a selected high frequency bandwidth. In some embodiments, the thickness of the main body region 11211 can be less than 80 μm. In some embodiments, the thickness of the main body region 11211 can be in the range of 10 μm-60 μm. In some embodiments, the thickness of the main body region 11211 can be 25 μm.

[0098] Fig.12 Schematic diagram of the amplitude of the sound-emitting part under different driving voltages according to some embodiments of this specification. Fig.12 As shown, under the same voltage, the diaphragm 1121 of the transducer 112 moves in two opposite directions (such as Figure 6 The positive and negative directions of the thickness direction X shown, that is, Fig.12 The amplitude of vibration of the positive and negative directions of the vertical axis is different, which is caused by the asymmetry of the diaphragm 1121. Fig.12 In the figure, the unit Vrms represents the effective voltage value of the sinusoidal AC signal. For example, 0.7Vrms means that the effective voltage value of the input sinusoidal AC signal is 0.7V. Fig.12 As shown, when the input voltage is in the range of 0.4V-0.7V, the amplitude of the vibration of the diaphragm 1121 downward (toward the negative direction of the ordinate axis) (about 0.8mm) is greater than the amplitude of the vibration upward (toward the positive direction of the ordinate axis) (about 0.6mm). The upward vibration of the diaphragm 1121 means that the diaphragm 1121 vibrates toward the front cavity 114, and the downward vibration of the diaphragm 1121 means that the diaphragm 1121 vibrates toward the rear cavity 116 (toward the magnetic circuit component 1125). Fig.12As shown, as the input voltage continues to increase (for example, from 0.7V to 1V), the amplitude change of the diaphragm 1121 gradually decreases and eventually approaches the threshold, wherein the amplitude of the downward vibration of the diaphragm 1121 approaches the first threshold (about 0.9mm), and the amplitude of the upward vibration approaches the second threshold (about 0.8mm). Since the amplitude of the downward vibration of the diaphragm 1121 is greater than the amplitude of the upward vibration, the amplitude of the diaphragm 1121 appearing in this specification refers to the larger downward vibration amplitude of the diaphragm 1121. In some embodiments, in order to prevent the coil 1122 from colliding with the magnetic circuit assembly 1125 when the diaphragm 1121 vibrates, the maximum amplitude of the diaphragm 1121 can be designed to be limited to no more than 0.8mm, that is, the amplitude of the diaphragm 1121 can be in the range of 0mm-0.8mm. In some embodiments, the amplitude of the diaphragm 1121 can be in the range of 0mm-0.75mm. In some embodiments, the amplitude of the diaphragm 1121 can be in the range of 0mm-0.7mm.

[0099] In some embodiments, within the amplitude range of 0 mm-0.8 mm, the difference in amplitude of the diaphragm 1121 vibrating in two opposite directions (i.e., upward vibration and downward vibration) may be less than 0.05 mm, so as to reduce the distortion of the transducer 112. In some embodiments, in order to further reduce the distortion of the transducer 112, the difference in amplitude of the diaphragm 1121 vibrating in two opposite directions (i.e., upward vibration and downward vibration) may be less than 0.04 mm. In some embodiments, in order to further reduce the distortion of the transducer 112, the difference in amplitude of the diaphragm 1121 vibrating in two opposite directions (i.e., upward vibration and downward vibration) may be less than 0.03 mm.

[0100] Please refer to Figure 8 and Fig. 9 In some embodiments, the bracket 1123 is disposed around the magnetic circuit assembly 1125. Fig. 9 As shown, along the vibration direction of the diaphragm, the support 1123 may include a first portion 112311, a second portion 11232 and a third portion 11233. The first portion 112311 refers to the portion along the vibration direction of the diaphragm 1121, from the highest point D of the region where the support 1123 is connected to the diaphragm 1121 to the highest point of the region where the support 1123 is connected to the receiving member 11253. The second portion 11232 refers to the region where the air holes are provided on the support 1123, as shown in FIG. Fig. 9As shown, the second portion 11232 refers to the portion along the vibration direction of the diaphragm 1121, from the highest point of the connection area between the support 1123 and the container 11253 to the side wall where the bottom of the air hole on the support 1123 is located (i.e., facing the bottom 11253a of the container 11253). The third portion 11233 refers to the portion between the side wall where the bottom of the air hole on the support 1123 is located and the bottom of the support 1123 close to the magnetic circuit component 1125 (i.e., close to the bottom 11253a of the container 11253). Fig.10 As shown, a second connecting section 11212b is provided at one end of the folding ring area 11212 away from the main body area 11211, which is used to connect the bracket 1123. The second connecting section 11212b is arranged parallel to the short axis direction Z and perpendicular to the vibration direction of the diaphragm. In some embodiments, the first part 112311 of the bracket 1123 is connected to the second connecting section 11212b of the folding ring area 11212. In some embodiments, the second connecting section 11212b of the folding ring area 11212 is connected to the first part 112311 of the bracket 1123 through a fixing ring 1155 to achieve the fixing of the diaphragm 1121 and the bracket 1123.

[0101] Fig.13 This is an exemplary structural diagram of a portion of the back cavity structure shown in some embodiments of this specification. Figure 6 and Fig.13 In some embodiments, a connecting frame 115 may be provided in the shell 111, and a second acoustic cavity may be formed between the connecting frame 115 and the bracket 1123 of the transducer 112, and the second acoustic cavity may serve as a rear cavity 116. The rear cavity 116 is separated from other structures in the shell 111 (such as a main control circuit board, etc.), which is beneficial to improving the acoustic performance of the sound-emitting part 11. Among them, the shell 111 is provided with a pressure relief hole (such as a first pressure relief hole 111c and / or a second pressure relief hole 111d), and an acoustic channel 1151 connecting the pressure relief hole and the rear cavity 116 is provided on the connecting frame 115, so that the rear cavity 116 is connected to the external environment, that is, air can freely enter and exit the rear cavity 116, which is beneficial to reduce the resistance of the diaphragm 1121 of the transducer 112 during the vibration process.

[0102] In some embodiments, the cross section of the rear cavity 116 may be composed of two vertical sides and a curved side, and the two end points of the curved side are connected, so that the cross section (for example, cross section ABC) can be approximately regarded as a triangle. Among them, the hypotenuse AC is composed of the line connecting the two end points formed by the curved surface formed on the connecting frame 115 and the two straight sides of the bracket 1123. In some embodiments, the thickness h4 of the first part 112311 of the bracket 1123 along the vibration direction of the diaphragm 1121 can affect the volume of the rear cavity 116. When the thickness h4 of the first part 112311 increases, the volume of the rear cavity 116 decreases while the volume of the entire sound-emitting part 11 remains unchanged; accordingly, when the thickness h4 of the first part 112311 decreases, the volume of the rear cavity 116 increases. In some embodiments, the thickness of the first part 112311 of the bracket 1123 can affect the volume of the rear cavity 116, thereby affecting the resonant frequency of the rear cavity 116. In some embodiments, the rear cavity 116 may refer to the cavity formed by the rear side of the diaphragm. At this time, the thickness h4 of the first part 112311 of the bracket 1123 increases, and the volume of the rear cavity 116 increases while the volume of the entire sound-emitting part 11 remains unchanged; correspondingly, the thickness h4 of the first part 112311 decreases, and the volume of the rear cavity 116 decreases.

[0103] In some embodiments, the combination of the rear cavity 116 and the pressure relief holes (e.g., the first pressure relief hole 111c and / or the second pressure relief hole 111d) provided on the shell 111 can be regarded as a Helmholtz resonance cavity model. The rear cavity 116 can be used as the cavity of the Helmholtz resonance cavity model, and the pressure relief hole can be used as the neck of the Helmholtz resonance cavity model. At this time, the resonance frequency of the Helmholtz resonance cavity model is the resonance frequency f2 of the rear cavity 116. In the Helmholtz resonance cavity model, the volume of the cavity (e.g., the rear cavity 116) can affect the resonance frequency f of the cavity (e.g., the rear cavity 116), and the specific relationship is shown in formula (1):

[0104]

[0105] Wherein, c represents the speed of sound, S represents the cross-sectional area of ​​the neck (eg, the pressure relief hole), V represents the volume of the cavity (eg, the rear cavity 116), and L represents the depth of the neck (eg, the pressure relief hole).

[0106] It can be seen from formula (1) that when the cross-sectional area S and the depth L of the pressure relief hole (for example, the first pressure relief hole 111c and / or the second pressure relief hole 111d) remain unchanged, the volume of the rear cavity 116 increases, and the resonant frequency f2 of the rear cavity 116 decreases, that is, moves to a low frequency.

[0107] Fig.14 is a frequency response curve diagram of the rear cavity corresponding to different thicknesses of the first portion 112311 shown in some embodiments of this specification. Fig.14It can be obtained that as the thickness h4 of the first part 112311 of the bracket 1123 gradually increases from 0.3 mm to 3 mm, the volume of the rear cavity 116 gradually increases, and the resonance peak of the rear cavity 116 gradually moves toward the low frequency, which reduces the flat range of the frequency response curve and affects the output performance of the sound-emitting part 11.

[0108] If the thickness h4 of the first portion 112311 is too small, the amplitude of the diaphragm 1121 will be limited by the bracket 1123. If the thickness h4 of the first portion 112311 is too large, the overall size of the sound-emitting portion 11 will be too large, and the resonance peak of the rear cavity 116 will move toward the low frequency, which will reduce the flat area of ​​the frequency response curve of the rear cavity 116 and affect the sound quality of the sound-emitting portion 11. The thickness of the first portion 112311 refers to the minimum distance between the connection area of ​​the bracket 1123 and the folding ring area 11212 and the area directly in contact with the magnetic circuit component 1125 in the vibration direction of the diaphragm 1121.

[0109] In some embodiments, in order to make the sound-emitting part 112 have a higher low-frequency output and make the frequency response curve of the rear cavity 116 have a larger flat area, the thickness h4 of the first part 112311 of the bracket 1123 can be in the range of 0.3mm-3mm. In some embodiments, in order to further improve the low-frequency output of the transducer 112, the thickness h4 of the first part 112311 can be in the range of 0.5mm-2mm. In some embodiments, in order to further increase the flat area of ​​the frequency response curve of the rear cavity 116, the thickness h4 of the first part 112311 can be in the range of 0.8mm-1mm. In some embodiments, the thickness h4 of the first part 112311 can be 0.9mm, at which time the resonance peak of the rear cavity 116 is near 6.1kHz, the sound-emitting part 11 has a better low-frequency output, and the frequency response curve of the rear cavity 116 has a wider flat area.

[0110] In some embodiments, the weight of the transducer 112 is mainly related to the bracket 1123 and the magnetic circuit assembly 1125, wherein the weight of the magnetic circuit assembly 1125 accounts for a relatively large proportion. In some embodiments, the weight of the bracket 1123 increases, and when the material of the bracket 1123 remains unchanged, it indicates that the size of the bracket 1123 increases, which can correspond to the increase in the area of ​​the diaphragm 1121. In some embodiments, the weight of the magnetic circuit assembly 1125 increases, which increases the magnetic induction intensity near the coil 1122 and the driving force generated on the coil, thereby increasing the vibration amplitude of the diaphragm 1121 and making the transducer 112 have higher sensitivity and better low-frequency effect. However, if the weight of the transducer 112 is too large, the weight of the sound-emitting part 11 will be too large, affecting the wearing stability and comfort of the open earphone 10.

[0111] In summary Figure 3The sound-producing part 11 shown at least partially covers the antihelix area and Figure 4 In the two wearing conditions shown in which the whole or part of the sound-emitting part 11 is extended into the concha cavity, the volume that can be heard by the ear 100 increases (equivalent to higher sound-emitting efficiency), so the weight of the transducer 112 can be reduced by reducing the size of the diaphragm 1121 or the weight of the magnetic circuit assembly 1125, so that the transducer 112 has higher sensitivity and low-frequency output, and the open-type earphone 10 has higher wearing stability and comfort. In some embodiments, the weight of the transducer 112 can be in the range of 1.1g-3.3g. In some embodiments, in order to further improve the sensitivity and low-frequency output of the transducer 112, the weight of the transducer 112 can be in the range of 1.5g-3g. In some embodiments, in order to further improve the wearing stability and comfort of the open-type earphone 10, the weight of the transducer 112 can be in the range of 2g-2.5g. In some embodiments, the weight of the transducer 112 can be 2.2g.

[0112] Fig.15 The frequency response curve of the sound-emitting part under different driving voltages shown in some embodiments of this specification is shown in FIG. The diaphragm surface of the speaker 112 faces the test microphone at a distance of 4 mm, and a voltage in the range of 0.1V-0.7V is applied to the speaker 112. The test frequency range is set to 20Hz-20000Hz, and the frequency response curve of the speaker 112 under different driving voltages can be obtained (such as Fig.15 Combined with Fig.12 and Fig.15 , when the input voltage is in the range of 0.1V-0.7V and the frequency is in the range of 20Hz-6.1kHz, the amplitude of the diaphragm 1121 is in the range of 0mm-0.8mm. At this time, in order to prevent the vibration of the coil 1122 from contacting the bottom 11253a of the container, the distance h3 (such as Fig. 9 In some embodiments, in order to reduce the size of the sound-emitting portion 11 and improve the comfort of the user when wearing it, the distance h3 (as shown in FIG. 115 ) between the bottom of the coil 1122 and the bottom 11253a of the receiving member is Fig. 9 Therefore, at an input voltage of 0.1V-0.7V, within a range of 20Hz-6.1kHz, the distance h3 (as shown) from the bottom of the coil 1122 to the bottom 11253a of the receiving member is Fig. 9 As shown) can be in the range of 0.8mm-0.9mm.

[0113] like Fig.15As shown in FIG. 1 , as the input voltage gradually increases from 100 mV to 700 mV, the output of the sound-generating part 11 gradually increases, and the sensitivity gradually increases, but the resonance peak frequency remains basically unchanged and is located near 6.1 kHz. Figure 3 The sound generating part 11 shown at least partially covers the antihelix area and Figure 4 In the two wearing conditions shown in FIG. 1 , the whole or part of the sound-emitting part 11 extends into the concha cavity, and the distance h3 (as shown in FIG. 1 ) from the bottom of the coil 1122 to the bottom of the receiving part 11253a is changed to Fig. 9 When the sound-emitting portion 11 is controlled within the range of 0.8 mm to 0.9 mm, the sound-emitting portion 11 has a higher sensitivity. Fig.15 As shown, when the input voltage is 100mV-700mV, at a frequency of 1kHz, the sound pressure level (SPL) of the sound-emitting part 11 is in the range of 85dB-103dB.

[0114] In some embodiments, as can be seen from the foregoing, the thickness h4 of the first part 112311 of the bracket 1123 is in the range of 0.3mm-3mm. When the thickness h4 of the first part 112311 increases to 3mm, the corresponding resonant frequency f2 of the rear cavity 116 decreases to 3.3kHz, which reduces the range of the flat area and affects the sound quality. In some embodiments, in order to increase the range of the flat area and improve the sound quality of the sound-emitting part 11, the thickness h4 of the first part 112311 can be less than 3mm, and the resonant frequency f2 of the rear cavity 116 can be not less than 3.3kHz. In some embodiments, in order to further improve the sound quality of the sound-emitting part 11, the resonant frequency f2 of the rear cavity 116 can be not less than 3.5kHz. In some embodiments, in order to further improve the sound quality of the sound-emitting part 11, the resonant frequency f2 of the rear cavity 116 can be not less than 4kHz. In some embodiments, in order to further improve the sound quality of the sound-emitting part 11, the resonant frequency f2 of the rear cavity 116 can be not less than 6kHz.

[0115] In some embodiments, according to formula (1), the volume of the rear cavity 116 can affect the resonant frequency f2 of the rear cavity 116. And the volume of the rear cavity 116 is affected by the thickness h4 of the first portion 112311 of the bracket 1123. The value range of the volume of the rear cavity 116 can be determined by the value range of the thickness h4 of the first portion 112311 and the value range of the resonant frequency f2 of the rear cavity 116. In some embodiments, the volume of the rear cavity 116 can be 60mm 3 -110mm 3 .

[0116] Fig.16 Schematic diagram of exemplary positions of the bracket, the first pressure relief hole, and the second pressure relief hole according to some embodiments of this specification. Fig.16As shown, in some embodiments, a plurality of air holes 11231 are provided on the bracket 1123. The air holes 11231 are provided so that the sound on the back of the diaphragm 1121 can be transmitted to the rear cavity 116 and the pressure relief holes through the plurality of air holes 11231 and propagated to the outside, providing a good channel for radiating sound on both sides of the diaphragm 1121.

[0117] In some embodiments, in order to better balance the airflow and balance the air pressure in the rear cavity 116, the plurality of air holes 11231 may be designed asymmetrically. For example, with the short axis of the bracket 1123 as the center, the plurality of air holes 11231 may be arranged asymmetrically. Specifically, the bracket 1123 is provided with a first air hole 11231a and a second air hole 11231b. Fig.16 As shown, the distance La between the center of the first air hole 11231a and the center of the second pressure relief hole 111d is greater than the distance Lb between the center of the second air hole 11231b and the center of the second pressure relief hole 111d. In some embodiments, the air pressure of the rear cavity 116 is higher at a position farther from the second pressure relief hole 111d. Therefore, in order to balance the air pressure in the rear cavity 116, the area of ​​the first air hole 11231a is greater than the area of ​​the second air hole 11231b. In other words, in order to balance the air pressure in the rear cavity 116, the closer the air hole is to the second pressure relief hole 111d (or the first pressure relief hole 111c), the smaller the area of ​​the air hole is, and the farther the air hole is from the second pressure relief hole 111d (or the first pressure relief hole 111c), the larger the area of ​​the air hole is. Among them, the distance between the air hole 11231 and the pressure relief hole refers to the distance between the center of the air hole 11231 and the center of the corresponding pressure relief hole. The center of the air vent or pressure relief hole in this specification refers to the geometric center of the hole structure.

[0118] In the rear cavity 116, at a position far from the first pressure relief hole 111c and / or the second pressure relief hole 111d, the air pressure is relatively high, so the area of ​​the air hole 11231 can be set to be larger; at a position close to the first pressure relief hole 111c and / or the second pressure relief hole 111d, the air pressure is relatively low, so the area of ​​the air hole 11231 can be set to be smaller. If the areas of multiple air holes 11231 are the same, the air pressure is higher at the position far from the first pressure relief hole 111c and / or the second pressure relief hole 111d in the rear cavity 116. Since the area of ​​the air holes 11231 here is small, the air pressure in the rear cavity 116 cannot be well balanced, which will cause the diaphragm 1121 to be subjected to greater air resistance when vibrating. Similarly, at a position close to the first pressure relief hole 111c and / or the second pressure relief hole 111d in the rear cavity 116, the diaphragm 1121 is subjected to less resistance when vibrating. As a result, the diaphragm 1121 is subjected to uneven force, which causes the diaphragm 1121 to vibrate unstably. Therefore, by adjusting the area of ​​the air holes 11231, the low-frequency vibration of the sound-emitting part 11 can be made more stable.

[0119] In some embodiments, since the air holes 11231 can balance the air pressure in the rear cavity 116 and affect the uniformity of the air resistance encountered by the diaphragm 1121 when it vibrates, the total area of ​​the air holes 11231 can affect the output performance of the sound-emitting part 11. And the ratio of the total area of ​​the plurality of air holes 11231 to the projected area of ​​the diaphragm 1121 along the vibration direction can affect the air resistance when the diaphragm 1121 vibrates. If the ratio of the total area of ​​the plurality of air holes 11231 to the projected area of ​​the diaphragm 1121 along the vibration direction is too small, the air pressure in the rear cavity 116 will be relatively high, and the air resistance encountered by the diaphragm 1121 when it vibrates will be relatively high, affecting the low-frequency output performance of the diaphragm 1121. When the ratio of the total area of ​​the plurality of air holes 11231 to the projected area of ​​the diaphragm 1121 along the vibration direction reaches a certain threshold, the ratio is increased, and the influence of the air in the rear cavity 116 on the vibration of the diaphragm 1121 is weakened, and the structural strength of the bracket will be affected. Therefore, in some embodiments, in order to make the diaphragm 1121 experience uniform and small air resistance when vibrating, and ensure good output performance of the sound-emitting part 11, the ratio of the total area of ​​the plurality of air holes 11231 to the projected area of ​​the diaphragm 1121 along the vibration direction can be in the range of 0.008-0.3. In some embodiments, in order to further reduce the air resistance experienced by the diaphragm 1121 when vibrating, the ratio of the total area of ​​the plurality of air holes 11231 to the projected area of ​​the diaphragm 1121 along the vibration direction can be in the range of 0.1-0.25. In some embodiments, in order to further reduce the air resistance experienced by the diaphragm 1121 when vibrating, the ratio of the total area of ​​the plurality of air holes 11231 to the projected area of ​​the diaphragm 1121 along the vibration direction can be in the range of 0.11-0.23.

[0120] Fig.17 It is the frequency response curve of the rear cavity corresponding to different total areas of air holes shown in some embodiments of this specification. Among them, the different total areas of air holes 11231 can be achieved by plugging the air holes 11231 with plasticine. The diaphragm surface of the speaker 112 faces the test microphone at a distance of 4mm, and a voltage of 0.4V is applied to the speaker 112. The test frequency range is set to 20Hz-20000Hz to obtain the frequency response curve of the speaker 112 under different air hole areas (such as Fig.17 As shown). Among them, 0mm 2 This means that the air holes 11231 are completely blocked, that is, there are no holes on the bracket. Fig.17 As shown, as the total area of ​​the vent holes 11231 increases from 0 mm 2 Gradually increases to 4.54mm 2, the frequency response curve of the rear cavity 116 gradually moves up in the low frequency (e.g., 100 Hz-1000 Hz) region, that is, the low frequency response of the rear cavity 116 gradually increases. 2 Gradually increases to 12.96mm 2 During the process, the low-frequency response of the rear cavity 116 does not change significantly. This is because when the total area of ​​the air holes 11231 increases to a certain area (for example, 4.54mm 2 ), under low-frequency vibration, the influence of the air in the rear cavity 116 on the vibration of the diaphragm 1121 gradually weakens. Therefore, even if the total area of ​​the air holes 11231 is increased, the influence on the frequency response curve of the low-frequency region of the rear cavity 116 is not significant.

[0121] like Fig.17 As shown, as the total area of ​​the vent holes 11231 increases from 0 mm 2 Gradually increases to 12.96mm 2 , the resonance peak of the rear cavity 116 gradually moves to high frequencies, and the frequency response curve of the low frequency region (e.g., 100 Hz-1000 Hz) gradually becomes flat. In some embodiments, in order to make the rear cavity 116 have a good low frequency response, the total area of ​​the sound-permeable holes 11231 can be 4.54 mm 2 -12.96mm 2 In some embodiments, in order to make the rear cavity 116 have a good low-frequency response, the total area of ​​the sound-permeable holes 11231 can be within 5mm 2 -11mm 2 In some embodiments, in order to make the rear cavity 116 have a good low-frequency response, the total area of ​​the sound-permeable holes 11231 can be 7mm 2 -10mm 2 In some embodiments, in order to make the rear cavity 116 have a good low-frequency response, the total area of ​​the sound-permeable holes 11231 can be 8mm 2 -10mm 2 within the range.

[0122] In some embodiments, in order to improve the structural strength, a plurality of air holes 11231 may be provided on the bracket 1123, and the connecting parts between the plurality of air holes 11231 form reinforcing ribs. In some embodiments, in order to simplify the hole-opening process, the number of air holes 11231 may also be set to only one, while the total area of ​​the air holes 11231 is satisfied.

[0123] In some embodiments, a plurality of air holes may be provided on the bottom 11253a or the side wall 11253b of the container 11253 of the magnetic circuit assembly 1125. The sound on the back of the diaphragm 1121 may be transmitted to the rear cavity 116 and the pressure relief hole through the plurality of air holes, and the air holes provide a good channel for radiating sound on both sides of the diaphragm 1121.

[0124] In some embodiments, the projection area of ​​the diaphragm 1121 in the vibration direction affects the amount of air pushed by the diaphragm 1121 when it vibrates, thereby affecting the efficiency of the diaphragm 1121 in generating sound and affecting the acoustic output effect of the sound-emitting part 11. If the projection area of ​​the diaphragm 1121 in the vibration direction is too small, the amount of air pushed by the diaphragm 1121 when it vibrates will be small, and the acoustic output effect of the sound-emitting part 11 will be poor. If the projection area of ​​the diaphragm 1121 in the vibration direction is too large, the size of the bracket 1123 will be too large, which will increase the weight of the bracket 1123, making the weight of the sound-emitting part 11 heavier, affecting the structure and weight of the sound-emitting part 11, and affecting the wearing comfort and stability. Figure 3 The sound generating part 11 shown at least partially covers the antihelix area and Figure 4 In the two wearing conditions shown, in which the whole or part of the sound-emitting part 11 is extended into the concha cavity, the volume that can be heard by the ear 100 increases (equivalent to higher sound-emitting efficiency), so the size of the diaphragm 1121 does not need to be too large. In some embodiments, the sound outlet hole 111a is arranged on the side wall of the shell 111 of the sound-emitting part 11 close to the ear of the user, and the sound outlet hole 111a is arranged on the front side of the diaphragm 1121 and is connected to the front cavity 114. The vibration direction of the diaphragm 1121 is or is approximately equal to the thickness direction X of the sound-emitting part 11, and the projection area of ​​the diaphragm 1121 in the vibration direction is or is approximately equal to the projection area of ​​the diaphragm 1121 in the sagittal plane. The projection area of ​​the diaphragm 1121 in the vibration direction can affect the projection area of ​​the sound-emitting part 11 on the sagittal plane of the user. The overlapping ratio of the projection area of ​​the sound-emitting part 11 on the user's sagittal plane and the projection area of ​​the concha cavity on the sagittal plane can affect the cavity-like structure formed by the sound-emitting part 11 extending into the concha cavity, thereby affecting the acoustic output effect of the sound-emitting part 11. Furthermore, the long-axis size and short-axis size of the diaphragm 1121 can affect the long-axis size and short-axis size of the projection of the sound-emitting part 11 on the sagittal plane.

[0125] In some embodiments, the above Figure 3 The sound generating part 11 shown at least partially covers the antihelix area and Figure 4 Considering the two cases that the whole or part of the sound-emitting part 11 extends into the concha cavity, in order to make the sound-emitting part 11 have good acoustic output, and the projection of the sound-emitting part 11 on the sagittal plane has a suitable area or the sound-emitting part 11 has a suitable thickness, the projection area of ​​the diaphragm 1121 in the vibration direction can be 90mm 2-560mm 2 Preferably, the projection area of ​​the diaphragm 1121 in the vibration direction can be 120 mm 2 -300mm 2 Preferably, the projection area of ​​the diaphragm 1121 in the vibration direction can be 150 mm 2 -200mm 2 .

[0126] In summary Figure 3 The sound-producing part 11 shown at least partially covers the antihelix area and Figure 4 Considering the two cases that the whole or part of the sound-emitting part 11 shown extends into the concha cavity, in order to make the diaphragm 1121 have as large an area as possible within the limited size of the sound-emitting part 11, thereby enhancing the acoustic output performance of the sound-emitting part 11, in some embodiments, when the vibration direction of the diaphragm 1121 is parallel to the thickness direction X of the sound-emitting part 11, the ratio of the projection area of ​​the diaphragm 1121 in the diaphragm vibration direction (i.e., the projection area of ​​the diaphragm 1121 in the sagittal plane) to the projection area of ​​the shell 111 in the diaphragm vibration direction (i.e., the projection area of ​​the shell 111 in the sagittal plane) may be not less than 0.5. In some embodiments, in order to make the diaphragm 1121 have as large an area as possible within the limited size of the sound-emitting part 11, thereby enhancing the acoustic output performance of the sound-emitting part 11, the ratio of the projection area of ​​the diaphragm 1121 in the diaphragm vibration direction to the projection area of ​​the shell 111 in the diaphragm vibration direction may be not less than 0.8. In some embodiments, the diaphragm 1121 is made to have as large an area as possible to enhance the acoustic output performance of the sound-emitting part 11, and the ratio of the projected area of ​​the diaphragm 1121 in the diaphragm vibration direction to the projected area of ​​the shell 111 in the diaphragm vibration direction can be in the range of 0.8-0.95.

[0127] In some embodiments, in combination with the above Figure 3 In the wearing mode shown, the sound-emitting part 11 at least partially covers the antihelix area, and the long axis size of the diaphragm 1121 can be in the range of 13mm-25mm, and the short axis size of the diaphragm can be in the range of 4mm-13mm. Figure 4 In the wearing mode shown in FIG. 1 , the whole or part of the sound-emitting part 11 is inserted into the concha cavity. In order to facilitate the whole or part of the sound-emitting part 11 to be inserted into the concha cavity to form an effective cavity-like body, the short axis size of the diaphragm 1121 can be in the range of 4 mm to 13 mm. Based on the above short axis size, based on the projection area of ​​the diaphragm 1121 (for example, the projection area of ​​the diaphragm 1121 in the vibration direction is 52 mm 2 -325mm 2The long axis size of the diaphragm 1121 is further determined to be within the range of 13 mm to 25 mm. For example, the long axis size of the diaphragm 1121 may be within the range of 15 mm to 20 mm, and the short axis size of the diaphragm may be within the range of 5 mm to 10 mm. For another example, the long axis size of the diaphragm 1121 may be within the range of 17 mm to 18 mm, and the short axis size of the diaphragm may be within the range of 7 mm to 8 mm.

[0128] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0129] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0130] In addition, it will be appreciated by those skilled in the art that various aspects of the present application may be illustrated and described by a number of patentable categories or situations, including any new and useful process, machine, product or combination of substances, or any new and useful improvements thereto. Accordingly, various aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software may all be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". In addition, various aspects of the present application may be represented as a computer product located in one or more computer-readable media, which includes computer-readable program code.

[0131] A computer storage medium may include a propagated data signal containing computer program code, for example, in baseband or as part of a carrier wave. The propagated signal may be in a variety of forms, including electromagnetic, optical, etc., or a suitable combination. A computer storage medium may be any computer-readable medium other than a computer-readable storage medium, which can be connected to an instruction execution system, device or apparatus to communicate, propagate or transmit the program for use. The program code on the computer storage medium may be transmitted via any suitable medium, including radio, cable, fiber optic cable, RF, or similar media, or any combination of the above media.

[0132] The computer program coding required for the operation of each part of the present application can be written in any one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, etc., conventional procedural programming languages ​​such as C language, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP, dynamic programming languages ​​such as Python, Ruby and Groovy, or other programming languages, etc. The program coding can be run completely on the user's computer, or run on the user's computer as an independent software package, or run partly on the user's computer and partly on the remote computer, or run completely on the remote computer or processing device. In the latter case, the remote computer can be connected to the user's computer through any network form, such as a local area network (LAN) or a wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or used as a service such as software as a service (SaaS).

[0133] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in the present application, the use of alphanumeric characters, or the use of other names are not intended to limit the order of the processes and methods of the present application. Although the above disclosure discusses some embodiments currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of the present application. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing processing device or mobile device.

[0134] Similarly, it should be noted that in order to simplify the description disclosed in this application and thus help understand one or more embodiments, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0135] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0136] Each patent, patent application, patent application disclosure, and other materials, such as articles, books, instructions, publications, documents, etc., cited in this application are hereby incorporated by reference in their entirety. Except for application history documents that are inconsistent with or conflicting with the content of this application, documents that limit the broadest scope of the claims of this application (currently or later attached to this application) are also excluded. It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content described in this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

[0137] Finally, it should be understood that the specific implementations described in this application are only exemplary, and one or more technical features in the specific implementations are optional or additional, and are not essential technical features that constitute the concept of this application. In other words, the scope of protection of this application covers and is far greater than the specific implementations.

Claims

1. A sound producing part, comprising: Diaphragm; Magnetic circuit components; a coil, the coil being connected to the diaphragm and at least partially located in the magnetic gap formed by the magnetic circuit assembly, the coil driving the diaphragm to vibrate to generate sound when energized, wherein the diaphragm includes a main body region and a folded ring region surrounding the main body region; and A bracket is arranged around the magnetic circuit assembly, the bracket is connected to a portion of the folding ring area away from the main body area, and a plurality of air holes are provided on the bracket; wherein The ratio of the total area of ​​the plurality of air holes to the projection area of ​​the diaphragm in the vibration direction of the diaphragm is in the range of 0.008-0.

3.

2. The sound-generating part according to claim 1, characterized in that: The ratio of the total area of ​​the plurality of air holes to the projection area of ​​the diaphragm in the vibration direction of the diaphragm is in the range of 0.1-0.

25.

3. The sound-generating part according to claim 1 or 2, characterized in that: In the vibration direction of the diaphragm, the projection area of ​​the diaphragm is 90mm 2 -560mm 2 within the range.

4. The sound-generating part according to claim 3, characterized in that: In the vibration direction of the diaphragm, the total area of ​​the plurality of air holes is 4.54 mm 2 -12.96mm 2 within the range.

5. The sound-generating part according to claim 2, characterized in that: It also includes a shell, which is provided with at least one pressure relief hole, wherein the sound on the back of the diaphragm is transmitted to the at least one pressure relief hole through the multiple air holes.

6. The sound-generating part according to claim 5, characterized in that: The multiple air holes include at least a first air hole and a second air hole, the distance between the center of the first air hole and the center of the pressure relief hole is greater than the distance between the center of the second air hole and the center of the pressure relief hole, and the area of ​​the first air hole is greater than the area of ​​the second air hole.

7. The sound-generating part according to claim 1 or 2, characterized in that: The plurality of air holes are distributed asymmetrically relative to the short axis of the bracket.

8. The sound-generating part according to claim 5, characterized in that: In the vibration direction of the diaphragm, the ratio of the projection area of ​​the diaphragm to the projection area of ​​the shell is in the range of 0.8-0.

95.

9. The sound-generating part according to claim 1 or 2, characterized in that: A plurality of air holes are provided on the bottom wall of the container of the magnetic circuit assembly or on the side wall in contact with the bracket.

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