CN220067680U

CN220067680U - Sounding part

Info

Publication number: CN220067680U
Application number: CN202320679267.2U
Authority: CN
Inventors: 张磊; 顾善勇; 赵洪强; 童珮耕; 解国林; 李永坚; 徐江; 招涛; 武多多; 戢澳; 齐心
Original assignee: KING TONE INNOVATION; Shenzhen Voxtech Co Ltd
Current assignee: KING TONE INNOVATION; Shenzhen Voxtech Co Ltd
Priority date: 2022-12-30
Filing date: 2023-03-24
Publication date: 2023-11-21
Anticipated expiration: 2033-03-24
Also published as: CN220067677U; CN220067679U

Abstract

One or more embodiments of the present specification relate to a sound emitting part including: a vibrating diaphragm; a magnetic circuit assembly; and the coil is connected with the vibrating diaphragm and is at least partially positioned in a magnetic gap formed by the magnetic circuit assembly, and the vibrating diaphragm is driven to vibrate to generate sound after the coil is electrified, wherein the vibrating diaphragm comprises a main body area and a folded ring area which is arranged around the main body area, the main body area comprises a first inclined section and a first connecting section which is connected with the coil, the first inclined section is attached to a part of the folded ring area, and the first inclined section inclines towards the direction deviating from the coil relative to the first connecting section.

Description

Sounding part

Cross reference

The present application claims priority from international application number PCT/CN2022/144339 filed 12/30 of 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of acoustics, and in particular, to a sound generating unit.

Background

With the development of acoustic output technology, a sounding part (e.g., an earphone) has been widely used in daily life of people, and can be used together with electronic devices such as a mobile phone and a computer, so as to provide users with hearing feast. The output performance of the sound emitting part has a great influence on the comfort of use of the user. The structure of the diaphragm in the sound emitting portion and the supporting structure that cooperates with the diaphragm generally affect the output performance of the sound emitting portion. Therefore, it is necessary to propose a sound emitting portion having high output performance.

Disclosure of Invention

The embodiment of the present specification provides a sound emitting portion including: comprising the following steps: a vibrating diaphragm; a magnetic circuit assembly; and the coil is connected with the vibrating diaphragm and is at least partially positioned in a magnetic gap formed by the magnetic circuit assembly, and the vibrating diaphragm is driven to vibrate to generate sound after the coil is electrified, wherein the vibrating diaphragm comprises a main body area and a folded ring area which is arranged around the main body area, the main body area comprises a first inclined section and a first connecting section which is connected with the coil, the first inclined section is attached to a part of the folded ring area, and the first inclined section inclines towards the direction deviating from the coil relative to the first connecting section. Through above-mentioned setting, glue that bonds when can avoiding the coil to bond to the vibrating diaphragm overflows to the ring area of rolling over, leads to glue to corrode the ring area of rolling over, influences the vibration performance of vibrating diaphragm.

In some embodiments, the sound generating part further comprises a bracket surrounding the magnetic circuit assembly, the bracket is connected with a part, far away from the main body area, on the folded ring area, and a plurality of ventilation holes are formed in the bracket; and the shell is provided with a pressure relief hole, wherein sound on the back of the vibrating diaphragm is transmitted to the pressure relief hole through the plurality of air holes, the plurality of air holes at least comprise 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 arrangement, the air pressure of the rear cavity can be balanced, so that the vibrating diaphragm is stressed uniformly and the low-frequency vibration of the sounding part is smoother.

In some embodiments, the tuck-loop region includes a second sloped segment that at least partially conforms to the first sloped segment. Through above-mentioned setting, glue that bonds when can avoiding the coil to bond to the vibrating diaphragm overflows to the ring area of rolling over, leads to glue to corrode the ring area of rolling over, influences the vibration performance of vibrating diaphragm.

In some embodiments, the second sloped section is located on a side of the first sloped section facing away from the coil. Through above-mentioned setting, glue that bonds when can avoiding the coil to bond to the vibrating diaphragm overflows to the ring area of rolling over, leads to glue to corrode the ring area of rolling over, influences the vibration performance of vibrating diaphragm.

In some embodiments, the garter area comprises an arcuate segment having a height to span ratio in the range of 0.35-0.4. By the arrangement, the sounding part has better output and lower distortion.

In some embodiments, the first inclined section has an inclination angle in the range of 5 ° -30 ° with respect to the first connecting section, the first connecting section being perpendicular to the vibration direction of the diaphragm. Through the arrangement, the distortion degree of the sound generating part can be reduced, and the ring folding area is prevented from being corroded and the vibration of the ring folding area is prevented from being influenced.

In some embodiments, the body region includes a dome located at an end of the first connecting section remote from the first sloped section, the dome spans in the range of 2mm-8mm, and the dome has a height in the range of 0.7mm-1.2 mm. With the above arrangement, the entire sound emitting portion can be made to have a proper thickness dimension and the vibration characteristics of the sound emitting portion can be improved.

In some embodiments, the ratio of the height of the dome to the span is in the range of 0.1-0.3. With the above arrangement, the entire sound emitting portion can be made to have a proper thickness dimension and the vibration characteristics of the sound emitting portion can be improved.

In some embodiments, the frequency at which the high frequency split vibration occurs is not less than 20kHz. With the above arrangement, the diaphragm can have a wide high-frequency bandwidth while reducing the occurrence of high-frequency division vibration in a bandwidth region.

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

In some embodiments, the sound emitting portion further includes a bracket disposed around the magnetic circuit assembly, a first portion of the bracket being connected to the second connecting section of the gimbal region. Through the arrangement, the support and the vibrating diaphragm can be fixed.

In some embodiments, the second connecting section of the hinge region is connected to the first portion of the stent by a securing ring. Through the arrangement, the support and the vibrating diaphragm can be fixed.

In some embodiments, the thickness of the first portion of the support connected to the gimbal region is in the range of 0.3mm-3mm, and the thickness of the first portion is the minimum distance between the connection region of the support and the gimbal region and the region where the support is directly attached to the magnetic circuit assembly in the vibration direction of the diaphragm. Through the arrangement, the sounding part can have higher low-frequency output, the frequency response curve of the rear cavity has a flat area with a larger range, and the tone quality of the sounding part is improved.

In some embodiments, the casing is provided with a pressure relief hole, a rear cavity is formed between the pressure relief hole and the back surface of the vibrating diaphragm, and the resonance frequency of the rear cavity is not less than 3.3kHz. Through the arrangement, the frequency response curve of the rear cavity can have a flat area with a large range, and the tone quality of the sound emitting part is improved.

In some embodiments, the volume of the rear cavity is 60mm ³ -110mm ³ Within the range.

In some embodiments, the sounding part further includes a housing, a pressure relief hole is formed in the housing, a plurality of ventilation holes are formed in the support, sound on the back of the diaphragm is transmitted to the pressure relief hole through the ventilation holes, and a ratio of a total area of the ventilation holes to a projection area of the diaphragm in a vibration direction of the diaphragm is in a range of 0.008-0.3. Through the arrangement, the vibrating diaphragm can be subjected to uniform and smaller air resistance when vibrating, and good output performance of the sound generating part is ensured.

In some embodiments, the projected area of the diaphragm is 90mm in the vibration direction of the diaphragm ² -560mm ² Within the range, the total area of the plurality of ventilation holes is 4.54mm ² -12.96mm ² Within the range. By the arrangement, the rear cavity can have good low-frequency response.

In some embodiments, the sound generating part further includes a housing, and a ratio of a projection area of the diaphragm to a projection area of the housing in a vibration direction of the diaphragm is not less than 0.5. With the arrangement, the diaphragm can have the largest area possible within the limited size of the sound generating part, so that the acoustic output performance of the sound generating part is enhanced.

In some embodiments, the ratio of the projected area of the diaphragm to the projected area of the housing in the vibration direction of the diaphragm is in the range of 0.8-0.95. With the arrangement, the diaphragm can have the largest area possible within the limited size of the sound generating part, so that the acoustic output performance of the sound generating part is enhanced.

In some embodiments, the major axis dimension of the diaphragm is in the range of 13mm-25mm and the minor axis dimension of the diaphragm is in the range of 4mm-13 mm. Through the arrangement, the whole or part of the sound generating part can conveniently extend into the concha cavity to form an effective cavity-like body, and the acoustic output performance of the sound generating part is enhanced.

In some embodiments, the bottom wall of the accommodating part of the magnetic circuit assembly or the side wall attached to the bracket is provided with a plurality of ventilation holes. Through the arrangement, sound on the back surface of the vibrating diaphragm can be transmitted to the rear cavity and the pressure relief hole through the plurality of air holes, and the air holes provide good channels for radiating sound on two sides of the vibrating diaphragm.

In some embodiments, the dome is formed from carbon fiber interlacing, at least some of the carbon fibers being interlaced at a first angle, the first angle being in the range of 45 ° -90 °. By the arrangement, the strength of the main body area can be increased, and the equivalent density of the main body area can be reduced.

In some embodiments, the dome has a thickness of less than 80um in the direction of vibration of the diaphragm. With the above arrangement, the weight of the main body region can be reduced.

In some embodiments, the minimum distance of the coil from the first sloped section is not less than 0.3mm. Through the arrangement, the safety distance between the ring folding area and the installation position of the coil can be kept, and glue for coil installation is prevented from overflowing to the ring folding area.

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 a distance between a center of the coil and a center of the magnetic conductive plate in a vibration direction of the diaphragm is less than 0.3mm. Through the arrangement, when the vibrating diaphragm vibrates up and down, at least part of coils can be located in the area with higher magnetic flux density of the magnetic circuit assembly, so that the magnetic field utilization efficiency of the magnetic circuit assembly is improved.

In some embodiments, a distance from a lowest point of the dome to an upper surface of the magnetic conductive plate in a vibration direction of the diaphragm is greater than 0.8mm. Through the arrangement, the maximum amplitude of the vibrating diaphragm can be met, so that the vibrating diaphragm does not collide with the magnetic conduction plate in the vibrating process.

In some embodiments, the magnetic circuit assembly includes a receiving member, and a distance between a bottom of the coil and a bottom wall of the receiving member is in a range of 0.2mm to 4mm in a vibration direction of the diaphragm. Through the arrangement, the volume of the sound generating part can be prevented from being too large, and meanwhile, the coil is prevented from being collided.

In some embodiments, the distance between the coil and the side wall of the receptacle is in the range of 0.1mm-0.5 mm. Through the arrangement, the collision of the coil can be avoided, and the magnetic field is ensured to provide power for the vibrating diaphragm.

Drawings

The present specification will be further elucidated by way of example embodiments, which will be described in detail by means of the accompanying drawings. The embodiments are not limiting, in which like numerals represent like structures, wherein:

FIG. 1 is a schematic illustration of an exemplary ear shown according to some embodiments of the application;

FIG. 2 is an exemplary wearing schematic of an open earphone shown in accordance with some embodiments of the present description;

FIG. 3 is an exemplary wearing schematic diagram of an open earphone shown according to some embodiments of the present description;

FIG. 4 is an exemplary wear diagram of another open earphone according to some embodiments of the present disclosure;

FIG. 5 is an exemplary distribution diagram of a dual sound source with a cavity structure disposed around one of the sound sources according to some embodiments of the present disclosure;

FIG. 6 is a schematic diagram of an exemplary internal structure of a sound emitting portion according to some embodiments of the present disclosure;

FIG. 7 is an exemplary profile view of a transducer shown in accordance with some embodiments of the present description;

FIG. 8 is an exemplary exploded view of a transducer shown in accordance with some embodiments of the present description;

FIG. 9 is an exemplary internal block diagram of a sound emitting portion according to some embodiments of the present disclosure;

FIG. 10 is an exemplary block diagram of a diaphragm according to some embodiments of the present description;

FIG. 11A is an exemplary high frequency bandwidth schematic of a sound emitting portion shown in accordance with some embodiments of the present description;

FIG. 11B is a schematic diagram of a woven structure of exemplary carbon fibers shown in accordance with some embodiments of the present disclosure;

FIG. 12 is a schematic diagram of the amplitude of the sounding portion at different driving voltages according to some embodiments of the present disclosure;

FIG. 13 is an exemplary block diagram of a rear cavity shown in accordance with some embodiments of the present disclosure;

FIG. 14 is a graph of frequency response of a rear cavity corresponding to thickness of different first portions shown in accordance with some embodiments of the present disclosure;

FIG. 15 is a graph of frequency response of a sounding portion at different driving voltages according to some embodiments of the present disclosure;

FIG. 16 is a schematic illustration of exemplary positions of a bracket and first and second pressure relief holes shown in accordance with some embodiments of the present disclosure; and

FIG. 17 is a graph showing the frequency response of the rear cavity for different total vent areas according to some embodiments of the present disclosure.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present specification, and it is possible for those of ordinary skill in the art to apply the present specification to other similar situations according to the drawings without inventive effort. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.

It will be appreciated that "system," "apparatus," "unit" and/or "module" as used herein is one method for distinguishing between 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.

As used in this specification and the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

In the description of the present specification, it should be understood that the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first", "second", "third", and "fourth" may explicitly or implicitly include at least one such feature. In the description of the present specification, the meaning of "plurality" means at least two, for example, two, three, etc., unless explicitly defined otherwise.

In this specification, unless clearly indicated and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly. For example, the term "coupled" may mean either a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.

A flowchart is used in this specification to describe the operations performed by the system according to embodiments of the present specification. It should be appreciated that the preceding or following operations are not necessarily performed in order precisely. Rather, the steps may be processed in reverse order or simultaneously. Also, other operations may be added to or removed from these processes.

Fig. 1 is a schematic diagram of an exemplary ear shown according to some embodiments of the application. Referring to fig. 1, ear 100 may include an external auditory canal 101, an concha cavity 102, an concha boat 103, a triangular fossa 104, an antitragus 105, an auricular boat 106, an auricle 107, an earlobe 108, and an auricular foot 109. In some embodiments, the wearing and stabilization of the acoustic device may be accomplished by one or more portions of the ear 100. In some embodiments, the external auditory meatus 101, the concha cavity 102, the concha boat 103, the triangular fossa 104 and other parts have a certain depth and volume in the three-dimensional space, and can be used for realizing the wearing requirement of the acoustic device. For example, an acoustic device (e.g., an in-ear earphone) may be worn on the outer ear In track 101. In some embodiments, the wearing of the acoustic device may be accomplished by other portions of the ear 100 than the external auditory canal 101. For example, the wearing of the acoustic device may be accomplished by means of a concha 103, triangular fossa 104, antihelix 105, arhat 106, helix 107, etc. or a combination thereof. In some embodiments, to improve the comfort and reliability of the acoustic device in terms of wearing, the earlobe 108 of the user may be further utilized. By enabling the wearing of the acoustic device and the propagation of sound by means of other parts of the ear 100 than the external auditory canal 101, the external auditory canal 101 of the user can be "liberated" and the influence of the acoustic device on the health of the user's ear can be reduced. When the user wears the acoustic device on the road, the acoustic device does not block the external auditory meatus 101 of the user, and the user can receive both the sound from the acoustic device and the sound from the environment (e.g., whistling, ringing, surrounding sounds, traffic sounds, etc.), so that the occurrence probability of traffic accidents can be reduced. For example, when the acoustic device is worn by a user, the entire or partial structure of the acoustic device may be located on the front side of the auricle 109 (e.g., region J surrounded by a broken line in fig. 1). For another example, when the acoustic device is worn by a user, the acoustic device may be in contact with an upper portion of the external auditory canal 101 (e.g., where one or more of the auricle 109, concha 103, triangular fossa 104, antitragus 105, otoboat 106, auricle 107, etc. are located). As another example, when the acoustic device is worn by a user, the entire or partial structure of the acoustic device may be located within one or more portions of the ear (e.g., the concha chamber 102, the concha boat 103, the triangular fossa 104, etc.) (e.g., the area M enclosed by the dashed lines in fig. 1) ₁ And M ₂ )。

Individual differences may exist for different users, resulting in different size differences in the shape, size, etc. of the ears. For ease of description and understanding, the present specification will further describe the manner in which the acoustic devices of the various embodiments are worn on an ear model having a "standard" shape and size, unless otherwise indicated, primarily by reference to that ear model. For example, simulators made based on ANSI: S3.36, S3.25 and IEC:60318-7 standards, such as GRAS KEMAR, HEAD diagnostics, B & K4128 series, or B & K5128 series, with the HEAD and its (left and right) ears, can be used as references for wearing acoustic devices, thereby presenting a scenario where most users wear acoustic devices normally. Taking GRAS KEMAR as an example, the simulator of the ear may be any one of GRAS 45AC, GRAS 45BC, GRAS 45CC, GRAS 43AG, or the like. Taking the HEAD physics as an example, the simulator of the ear can be any of HMS II.3, HMS II.3LN, or HMS II.3LN HEC, etc. It should be noted that the data ranges measured in the examples of this specification are 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 that there may be + -10% fluctuations in the data ranges related to other models. For example only, the referenced ears may have the following relevant features: the dimension 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 dimension of the projection of the auricle on the sagittal plane in the sagittal axis direction can be in the range of 36.6mm-55mm. The projection of the auricle in the sagittal plane refers to the projection of the edge of the auricle in the sagittal plane. The edge of auricle is composed of at least the external contour of auricle, the auricle contour, the tragus contour, the inter-screen notch, the opposite-screen tip, the trabecular notch and the like. Accordingly, in the present application, descriptions such as "user wearing", "in wearing state", and "in wearing state" may refer to the acoustic device of the present application being worn on the ear of the aforementioned simulator. Of course, in consideration of individual differences among different users, the structure, shape, size, thickness, etc. of one or more portions of the ear 100 may be differently designed according to the ear of different shapes and sizes, and these differently designed may be represented as characteristic parameters of one or more portions of the acoustic device (e.g., sound emitting portion, ear hook, etc. hereinafter) may have different ranges of values, thereby accommodating different ears.

It should be noted that: in the fields of medicine, anatomy, etc., three basic tangential planes of the Sagittal Plane (Sagittal Plane), the Coronal Plane (Coronal Plane) and the Horizontal Plane (Horizontal Plane) of the human body, and three basic axes of the Sagittal Axis (Sagittal Axis), the Coronal Axis (Coronal Axis) and the Vertical Axis (Vertical Axis) may be defined. The sagittal plane is a section perpendicular to the ground and is divided into a left part and a right part; the coronal plane is a tangential plane perpendicular to the ground and is formed along the left-right direction of the body, and divides the human body into a front part and a rear part; the horizontal plane refers to a section parallel to the ground, which is taken in the vertical direction perpendicular to the body, and divides the body into upper and lower parts. Accordingly, the sagittal axis refers to an axis along the anterior-posterior direction of the body and perpendicular to the coronal plane, the coronal axis refers to an axis along the lateral direction of the body and perpendicular to the sagittal plane, and the vertical axis refers to an axis along the superior-inferior direction of the body and perpendicular to the horizontal plane. Further, the "front side of the ear" as used herein refers to the side of the ear facing the facial area of the human body along the sagittal axis. The front outline schematic diagram of the ear shown in fig. 1 can be obtained by observing the ear of the simulator along the direction of the coronal axis of the human body.

The above description of the ear 100 is for illustrative purposes only and is not intended to limit the scope of the present application. Various changes and modifications may be made by one of ordinary skill in the art in light of the description of the application. For example, a part of the structure of the acoustic device may shield part or all of the external auditory meatus 101. Such variations and modifications are intended to be within the scope of the present application.

Fig. 2 is an exemplary wearing schematic diagram of an open earphone according to some embodiments of the present specification, fig. 3 is an exemplary wearing schematic diagram of an open earphone according to some embodiments of the present specification, and fig. 4 is an exemplary wearing schematic diagram of another open earphone according to some embodiments of the present specification. In some embodiments, the open earphone 10 may include, but is not limited to, an air conduction earphone, a bone air conduction earphone, and the like. In some embodiments, the open earphone 10 may be combined with eyeglasses, headphones, a head mounted display device, an AR/VR helmet, or the like. As shown in fig. 2-4, the open earphone 10 may include a sound emitting portion 11 and an ear hook 12. In some embodiments, the open earphone 10 may wear the sound emitting portion 11 on the user's body (e.g., the head, neck, or upper torso of a human body) through the ear hook 12.

In some embodiments, the open earphone 10 is worn with a first portion of the ear hook 12 hanging between the pinna and the head of the user and a second portion extending toward the side of the pinna facing away from the head and connecting the sound emitting portion 11 for securing the sound emitting portion 11 in a position adjacent to but not occluding the ear canal. In some embodiments, the earhook 12 may be an arcuate structure that fits over the pinna of the user so that the earhook 12 may hang from the pinna of the user. In some embodiments, the earhook 12 may also be a gripping structure that fits around the pinna of the user so that the earhook 12 may be gripped at the pinna of the user. In some embodiments, the earhook 12 may include, but is not limited to, a hook structure, an elastic band, etc., so that the open earphone 10 may be better secured to the user, preventing the user from falling out during use.

In some embodiments, the sound emitting portion 11 may be adapted to be worn on the body of a user, and a transducer (e.g., transducer 112) may be disposed within the sound emitting portion 11 to generate sound for input to the user's ear 100. In some embodiments, the open earphone 10 may be combined with eyeglasses, headphones, a head mounted display device, an AR/VR helmet, or the like, in which case the sound emitting portion 11 may be worn in a hanging or clamping manner near the user's ear 100. In some embodiments, the sound emitting portion 11 may be circular, oval, polygonal (regular or irregular), U-shaped, V-shaped, semicircular, so that the sound emitting portion 11 may hang directly against the user's ear 100.

In conjunction with fig. 1 and 2, in some embodiments, at least a portion of the sound emitting portion 11 may be located in an area J on the front side of the tragus or in areas M1 and M2 within the pinna of the user's ear 100 shown in fig. 1 when the user wears the open earphone 10. The following will exemplarily explain in connection with different wearing positions (11A, 11B, and 11C shown in fig. 2) of the sound emitting portion 11. In the embodiments of the present disclosure, the front lateral surface of the auricle refers to a side of the auricle facing away from the head in the coronal axis direction, and the rear medial surface of the auricle refers to a side of the auricle facing toward the head in the coronal axis direction. In some embodiments, the sound emitting portion 11 being located at 11A means that the sound emitting portion 11 is located at a side of the user's ear 100 toward the human face region in the sagittal axis direction, i.e., a region J where the sound emitting portion 11 is located at the front side of the ear 100.

Further, a transducer (e.g., transducer 112) is disposed inside the housing of the sound emitting portion 11, and at least one sound emitting hole (e.g., sound emitting hole 111a, not shown in fig. 2) may be disposed on the housing (e.g., housing 111) of the sound emitting portion 11, and the sound emitting hole may be located on a side wall of the housing of the sound emitting portion facing or near the external auditory meatus 101 of the user, and the transducer may output sound to the external auditory meatus 101 of the user through the sound emitting hole. The transducer is a component which can receive an electric signal and convert the electric signal into a sound signal for output. In some embodiments, the types of transducers 112 may include low frequency (e.g., 30Hz-150 Hz) speakers, medium low frequency (e.g., 150Hz-500 Hz) speakers, medium high frequency (e.g., 500Hz-5 kHz) speakers, high frequency (e.g., 5kHz-16 kHz) speakers, or full frequency (e.g., 30Hz-16 kHz) speakers, or any combination thereof, differentiated by frequency. The low frequency, the high frequency, and the like herein represent only the approximate range of frequencies, and may have different division schemes in different application scenarios. For example, a frequency division point may be determined, where a low frequency indicates a frequency range below the frequency division point and a high frequency indicates a frequency above the frequency division point. The crossover point may be any value within the audible range of the human ear, e.g., 500Hz,600Hz,700Hz,800Hz,1000Hz, etc.

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 cavity inside the casing of the sound generating part 11 is divided by the diaphragm into at least a front cavity (for example, the front cavity 114) located at the front side of the diaphragm and a rear cavity (for example, the rear cavity 116) located at the rear side of the diaphragm, the sound outlet is acoustically coupled with the front cavity, the vibration of the diaphragm drives the air vibration of the front cavity to generate air guiding sound, and the air guiding sound generated by the front cavity propagates to the outside through the sound outlet. In some embodiments, the casing of the sound generating portion 11 may further include one or more pressure relief holes (for example, the first pressure relief hole 111c and the second pressure relief hole 111 d), where the pressure relief holes may be located on a side wall of the casing adjacent to or opposite to a side wall where the sound outlet hole is located, the pressure relief holes are acoustically coupled to the rear cavity, and the vibrating diaphragm vibrates and drives air in the rear cavity to vibrate to generate air guiding sound, so that the air guiding sound generated in the rear cavity can be transmitted to the outside through the pressure relief holes. Illustratively, in some embodiments, the transducer within the sound emitting portion 11 may output sound with a phase difference (e.g., opposite phase) through the sound emitting aperture and the pressure relief aperture, the sound emitting aperture may be located on a side of the housing of the sound emitting portion 11 facing the external auditory meatus 101 of the user, the pressure relief aperture may be located on a side of the housing of the sound emitting portion 11 facing away from the external auditory meatus 101 of the user, at which time the housing may act as a baffle to increase the sound path difference of the sound emitting aperture and the pressure relief aperture to the external auditory meatus 101 to increase the sound intensity at the external auditory meatus 101 while reducing the volume of far-field leakage sound.

In some embodiments, the sound emitting portion 11 may have a long axis direction Y and a short axis direction Z perpendicular to the thickness direction X and orthogonal to each other. The long axis direction Y may be defined as a direction having a maximum extension (for example, a long axis direction, that is, a long direction of a rectangle or an approximately rectangle when the projected shape is a rectangle or an approximately rectangle) among the shapes of the two-dimensional projection surfaces of the sound generating section 11 (for example, a projection of the sound generating section 11 on a plane on which the outer side surface thereof is located, or a projection on a sagittal plane), and the short axis direction Z may be defined as a direction perpendicular to the long axis direction Y among the shapes of the sound generating section 11 projected on the sagittal plane (for example, a short axis direction, that is, a width direction of a rectangle or an approximately rectangle when the projected shape is a rectangle or an approximately rectangle). The thickness direction X may be defined as a direction perpendicular to the two-dimensional projection plane, e.g., a direction coincident with the coronal axis, both pointing in a direction to the left and right of the body. In some embodiments, when the sound generating portion 11 is in an inclined state in the wearing state, the long axis direction Y is still parallel or approximately parallel to the sagittal plane, and the long axis direction Y may have an angle with the direction of the sagittal axis, that is, the long axis direction Y is also correspondingly inclined, and the short axis direction Z may have an angle with the direction of the vertical axis, that is, the short axis direction Z is also inclined, as in the wearing situation of the sound generating portion 11 shown in fig. 2 when the sound generating portion 11 is worn on the face 11B and in fig. 4. In some embodiments, the entire or partial structure of the sound emitting portion 11 may extend into the concha cavity, that is, the projection of the sound emitting portion 11 onto the sagittal plane has a portion that overlaps with the projection of the concha cavity onto the sagittal plane. For the specific content of the sound emitting portion 11 to be worn at 11B, reference may be made to the content elsewhere in the specification, for example, fig. 3 and the corresponding specification content thereof. In some embodiments, the sound generating part 11 may be in a horizontal state or an approximately horizontal state in the wearing state, as shown in fig. 2, in which the sound generating part 11 is worn at 11C and the sound generating part 11 shown in fig. 3, the long axis direction Y may be identical or approximately identical to the sagittal axis direction, and may be directed in the front-rear direction of the body, and the short axis direction Z may be identical or approximately identical to the vertical axis direction, and may be directed in the up-down direction of the body. It should be noted that, in the wearing state, the sound emitting portion 11 being in an approximately horizontal state may mean that an angle between the long axis direction and the sagittal axis of the sound emitting portion 11 shown in fig. 2 is within a specific range (for example, not more than 20 °). Further, the wearing position of the sound emitting portion 11 is not limited to 11A, 11B, and 11C shown in fig. 2, and may satisfy the region J, the region M1, or the region M2 shown in fig. 1. For example, the sounding part 11 may be wholly or partially structured in a region J surrounded by a broken line in fig. 1. For another example, the entire or partial structure of the sound emitting portion 11 may be in contact with one or more portions of the auricle 109, the concha 103, the triangular fossa 104, the antitragus 105, the auricle 106, the auricle 107, and the like of the external auditory meatus 101. As another example, the entire or partial structure of the sound emitting portion 11 may be located within a cavity (e.g., a region M1 surrounded by a dashed line in fig. 1 and containing at least the concha vessel 103, the triangular fossa 104, and a region M2 containing at least the concha chamber 102) formed by one or more portions of the ear 100 (e.g., the concha chamber 102, the concha vessel 103, the triangular fossa 104, etc.).

In some embodiments, to improve the stability of the open earphone 10 in the worn state, the open earphone 10 may employ any one or a combination of the following. For example, at least a portion of the earhook 12 is configured to conform to a contoured structure of at least one of the back side of the ear and the head to increase the contact area of the earhook 12 with the ear and/or head, thereby increasing the resistance to the open earphone 10 falling off of the ear. For example, at least a portion of the earhook 12 is configured to be resilient in a configuration that provides a certain amount of deformation when worn to increase the positive pressure of the earhook 12 against the ear and/or head, thereby increasing the resistance to the open earphone 10 falling off the ear. For example, the ear hook 12 is at least partially disposed to abut on the head in a worn state, so as to form a reaction force against the holding ear, so that the sounding part 11 is held against the front side of the ear, thereby increasing the resistance against the opening earphone 10 coming off from the ear. For example, the sound emitting portion 11 and the ear hook 12 are provided so as to sandwich physiological parts such as an area where the antitragus is located, an area where the concha cavity is located, and the like from both front and rear sides of the ear in a wearing state, thereby increasing resistance to the open earphone 10 coming off from the ear. For another example, the sound emitting portion 11 or an auxiliary structure connected thereto is provided to extend at least partially into physiological parts such as the concha cavity, the concha boat, the triangular fossa, the ear boat, and the like, thereby increasing the resistance of the open earphone 10 from falling off the ear.

The sound emitting portion 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. Illustratively, in connection with fig. 4, the free end FE of the sound emitting portion 11 may extend into the concha cavity in the worn state. Alternatively, the sounding part 11 and the ear hook 12 may be provided to clamp the aforementioned ear area from both front and rear sides of the ear area corresponding to the concha cavity together, thereby increasing resistance of the open earphone 10 to falling off from the ear, and further improving stability of the open earphone 10 in a worn state. For example, the free end FE of the sound emitting portion is pressed in the thickness direction X in the concha cavity. For another example, the free end FE abuts within the concha cavity in the long axis direction Y and/or the short axis direction Z (e.g., abuts an inner wall of the opposing free end FE of the concha cavity). The free end FE of the sound emitting portion 11 is an end portion of the sound emitting portion 11 opposite to the fixed end connected to the ear hook 12. The sound emitting portion 11 may be a regular or irregular structure, and is exemplified herein for further explanation of the free end FE of the sound emitting portion 11. For example, when the sound emitting portion 11 has a rectangular parallelepiped structure, the end wall surface of the sound emitting portion 11 is a flat surface, and at this time, the free end FE of the sound emitting portion 11 is an end side wall of the sound emitting portion 11 that is disposed opposite to the fixed end connected to the ear hook 12. For another example, when the sounding part 11 is a sphere, an ellipsoid, or an irregular structure, the free end FE of the sounding part 11 may be a specific region apart from the fixed end obtained by cutting the sounding part 11 along the Y-Z plane (the plane formed by the short axis direction Z and the thickness direction X). It should be noted that: in the wearing state, the free end FE of the sound emitting portion 11 may be projected forward to fall on the antitragus, or may be projected forward to fall on the left and right sides of the head and to be positioned on the front side of the ear on the sagittal axis of the human body, in addition to extending into the concha. In other words, the ear hook 12 can support the sound emitting portion 11 to be worn to a wearing position such as the concha cavity, the antitragus, the front side of the ear, or the like.

The open earphone 10 is described in detail below with reference to the open earphone 10 shown in fig. 4. It is to be appreciated that the structure of the open earphone 10 of fig. 4 and its corresponding parameters may also be equally applicable in the open earphone of the other configurations mentioned above without departing from the corresponding acoustic principles.

By extending at least part of the sound emitting portion 11 into the concha cavity, the volume of the sound at the listening position (e.g. at the ear canal opening), in particular the volume of the sound at medium and low frequencies, can be increased while still maintaining a good far-field leakage cancellation effect. By way of example only, when the entire or partial structure of the sound-emitting portion 11 extends into the concha chamber, the sound-emitting portion 11 and the concha chamber form a structure similar to a chamber (hereinafter simply referred to as a chamber-like body), which in the illustrated embodiment may be understood as a semi-closed structure surrounded by the side wall of the sound-emitting portion 11 and the concha chamber structure together, the semi-closed structure being such that the interior is not completely hermetically sealed from the outside environment, but has a leak structure (e.g., an opening, a slit, a duct, etc.) that is in acoustic communication with the outside environment. When the user wears the open earphone 10, one or more sound outlet holes may be disposed on a side of the housing of the sound generating part 11, which is close to or faces the ear canal of the user, and one or more pressure release holes may be disposed on other side walls (for example, side walls away from or facing away from the ear canal of the user) of the housing of the sound generating part 11, where the sound outlet holes are acoustically coupled with the front cavity of the open earphone 10, and the pressure release holes are acoustically coupled with the rear cavity of the open earphone 10. Taking the sounding part 11 including a sounding hole and a pressure relief hole as examples, the sound output by the sounding hole and the sound output by the pressure relief hole can be approximately regarded as two sound sources, the sound wave phases of the two sound sources are opposite, the inner wall corresponding to the sounding part 11 and the concha cavity forms a cavity-like structure, wherein the sound source corresponding to the sounding hole is located in the cavity-like structure, and the sound source corresponding to the pressure relief hole is located outside the cavity-like structure, so as to form the acoustic model shown in fig. 5.

Fig. 5 is an exemplary distribution diagram of a structure of a cavity disposed around one of the dual sound sources according to some embodiments of the present description. As shown in fig. 5, a listening position and at least one sound source 501A may be contained in a cavity-like structure 502. "comprising" herein may mean that at least one of the listening position and the sound source 501A is inside the cavity-like structure 502, or that at least one of the listening position and the sound source 501A is at an inner edge of the cavity-like structure 502. The listening position may be equivalent to an ear canal entrance, or may be an ear acoustic reference point, such as an ear reference point (ear reference point, ERP), eardrum reference point (ear-drum reference point, DRP), etc., or may be an entrance structure directed to the listener, etc. Since the sound source 501A is surrounded by the cavity-like structure 502, most of the sound radiated therefrom reaches the listening position by direct or reflected radiation. In contrast, without the cavity-like structure 502, the sound source 501A radiates sound that does not mostly reach the listening position. Thus, the arrangement of the cavity structure results in a significant increase in the volume of sound reaching the listening position. Meanwhile, only a small portion of the inverted sound radiated from the inverted sound source 501B outside the cavity-like structure 502 enters the cavity-like structure 502 through the leakage structure 503 of the cavity-like structure 502. This corresponds to the creation of a secondary sound source 501B' at the leak structure 503, which has a significantly smaller intensity than the sound source 501B and also significantly smaller intensity than the sound source 501A. The sound generated by the secondary sound source 501B' has a weak effect of anti-phase cancellation on the sound source 501A in the cavity, so that the volume of the sound at the sound listening position is remarkably increased. For leaky sound, the sound source 501A radiates sound to the outside through the leaky structure 503 of the cavity, which is equivalent to generating one secondary sound source 501A 'at the leaky structure 503, since almost all sound radiated by the sound source 501A is output from the leaky structure 503 and the cavity-like structure 502 dimensions are much smaller (differ by at least an order of magnitude) than the spatial dimensions of the estimated leaky sound, the intensity of the secondary sound source 501A' can be considered to be equivalent to the sound source 501A. For the outside space, the secondary sound source 501A' and the sound source 501B form a dual sound source, which eliminates leakage.

In a specific application scenario, the outer wall surface of the shell of the sound generating part 11 is usually a plane or a curved surface, and the outline of the user's concha cavity 102 is of an uneven structure, and by extending part or the whole structure of the sound generating part 11 into the concha cavity, a cavity-like structure communicated with the outside is formed between the outline of the sound generating part 11 and the outline of the concha cavity, further, the sound outlet is arranged at the position of the shell of the sound generating part 11 facing the ear canal opening of the user and being close to the edge of the concha cavity 102, and the pressure relief hole is arranged at the position of the sound generating part 11 facing away from or far away from the ear canal opening, the acoustic model shown in fig. 5 can be constructed, so that the user can improve the listening position of the user at the ear canal opening and reduce the far-field sound leakage effect when wearing the open earphone 10.

Fig. 6 is a schematic diagram of an exemplary internal structure of a sound emitting portion according to some embodiments of the present description. As shown in fig. 6, in some embodiments, the sound emitting portion 11 may include a transducer 112 and a housing 111 containing the transducer 112, and the transducer 112 may include a diaphragm 1121. A front chamber 114 located at the front side of the diaphragm 1121 and a rear chamber 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 an acoustic vent 111a acoustically coupled to the front chamber 114 and a pressure relief vent (e.g., a first pressure relief vent 111c and a second pressure relief vent 111d, wherein the second pressure relief vent 111d is not shown in fig. 6) acoustically coupled to the rear chamber 116. A connector 115 may be disposed within the housing 111. The connecting frame 115 is provided with an acoustic channel 1151 for communicating the first pressure relief hole 111c with the rear cavity 116, so that the rear cavity 116 is communicated with the external environment, that is, air can freely enter and exit the rear cavity 116, thereby being beneficial to reducing the resistance of the vibrating diaphragm of the transducer 112 in the vibration process.

Fig. 7 is an exemplary outline view of a transducer according to some embodiments of the present description, and fig. 8 is an exemplary exploded view of a transducer according to some embodiments of the present description. Referring to fig. 7 and 8, in some embodiments, the sound generating portion 11 may include a diaphragm 1121, a coil 1122, a bracket 1123, a terminal 1124, and a magnetic circuit assembly 1125. Wherein the bracket 1123 provides a mounting and securing platform, the speaker 112 may be coupled to the housing 111 via the bracket 1123, the terminals 1124 may be secured to the bracket 1123, and the terminals 1124 may be used for electrical connection (e.g., connection 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, and the magnetic circuit assembly 1125 applies a force to the energized coil 1122, thereby driving the diaphragm 1121 to generate mechanical vibration and further generating sound through the transmission of air or other medium. The magnetic circuit assembly 1125 may include a magnetically permeable plate 11251, a magnet 11252, and a receiver 11253. The magnetic conductive plate 11251 is located between the magnet 11252 and the diaphragm 1121 and attached to the surface of the magnet 11252.

Fig. 9 is an exemplary internal structural view of a sound emitting part according to some embodiments of the present specification, and fig. 10 is an exemplary structural view of a diaphragm according to some embodiments of the present specification. The sound generating portion 11 includes a diaphragm 1121, a coil 1122, a bracket 1123, and a magnetic circuit assembly 1125. Wherein, support 1123 is disposed around diaphragm 1121, coil 1122, and magnetic circuit assembly 1125 for providing a mounting and securing platform. The sound generating portion 11 may be connected to the housing 111 through a bracket 1123, the coil 1122 extends into the magnetic circuit assembly 1125 and is connected to the diaphragm 1121, the magnetic circuit assembly 1125 generates a force on the energized coil 1122, so as to drive the diaphragm 1121 to generate mechanical vibration, and further generate sound through propagation of air or other media, and the sound is output through the sound outlet. In some embodiments, the magnetic circuit assembly 1125 includes a magnetically permeable plate 11251, a magnet 11252, and a receiver 11253, the magnetically permeable plate 11251 and the magnet 11252 being interconnected, a side of the magnet 11252 remote from the magnetically permeable plate 11251 being mounted to a bottom wall of the receiver 11253 with a gap between a peripheral side of the magnet 11252 and a peripheral side inner sidewall of the receiver 11253. In some embodiments, the peripheral outer sidewall of the receiver 11253 is fixedly coupled to the bracket 1123. In some embodiments, the accommodating element 11253 and the magnetic conductive plate 11251 may be made of magnetic conductive materials (e.g., iron, etc.). In some embodiments, the peripheral side of the diaphragm 1121 may be coupled to the support 1123 by a retaining ring 1155. In some embodiments, the material of the fixing ring 1155 may include stainless steel or other metal materials to adapt to the manufacturing process of the diaphragm 1121. Referring to fig. 8, the magnetic circuit assembly 1125 may include a magnetic conductive plate 11251, a magnet 11252, and a receiver 11253. The accommodating member 11253 and the magnetic conductive plate 11251 may be made of magnetic conductive material (e.g., iron). In some embodiments, the receiver 11253 includes a bottom 11253a and a peripheral side wall 11253b of the receiver, the bottom 11253a and the side wall 11253b of the receiver enclosing a receiving space in which the magnetically permeable plate 11251 and the magnet 11252 are received. The magnetic conductive plate 11251 is connected to the magnet 11252, and a side of the magnet 11252 away from the magnetic conductive plate 11251 is mounted to the bottom 11253a of the holder with a gap between the circumferential side of the magnet 11252 and the sidewall 11253b of the circumferential side of the holder 11253. In some embodiments, the coil 1122 may extend into the gap between the magnet 11252 and the sidewall 11253 b.

In some embodiments, in order to enable at least part of the coil 1122 to be located in a region of the magnetic circuit assembly 1125 where the magnetic flux density is high during the up-down vibration of the diaphragm 1121, to improve the magnetic field utilization efficiency of the magnetic circuit assembly 1125, a distance dd between a center point J of the coil 1122 and a center point K of the magnetic conductive plate 11251 is less than 0.3mm in the vibration direction of the diaphragm 1121. For example, the center point J of the coil 1122 and the center point K of the magnetically permeable plate 11251 may be substantially on the same horizontal line such that the magnetic circuit assembly 1125 generates a greater force on the coil 1122 to power the vibration of the diaphragm 1121.

Referring to fig. 9 and 10, in some embodiments, the diaphragm 1121 may include a main body region 11211 and a ring-folded region 11212 disposed around the main body region 11211. In some embodiments, the body region 11211 includes a first sloped section 11211a and a first connecting section 11211b connected to the coil 1122. As shown in fig. 9, a first connection section 11211b is used to connect the coils 1122, and the first connection section 11211b is disposed parallel to the short axis direction Z and perpendicular to the vibration direction of the diaphragm. The first inclined section 11211a is attached to a partial region of the folded-over region 11212. In some embodiments, the first inclined segment 11211a is inclined relative to the first connecting segment 11211b in a direction away from the coil 1122. As shown in connection with fig. 9 and 10, the coil 1122 is located at the lower side of the first connecting section 11211b, and the first inclined section 11211a is inclined upward (i.e., away from the direction away from the coil 1122) with respect to the first connecting section 11211b. With the above arrangement, it is possible to prevent the glue for bonding from overflowing to the annular region 11212 when the coil 1122 is bonded to the diaphragm 1121, which would cause the glue to corrode the annular region 11212, affecting the vibration performance of the diaphragm 1121.

In some embodiments, the magnetic circuit 1125 mainly comprises a magnetic conductive plate 11251 and a magnet 11252 and the accommodation member 11253, the magnetic conductive plate 11251 and the magnet 11252 are connected to each other, a side of the magnet 11252 away from the magnetic conductive plate 11251 is mounted to the bottom wall of the accommodation member 11253, and a gap is provided between the circumferential side of the magnet 11252 and the circumferential side inner wall of the accommodation member 11253. The coil 1122 may extend into the gap between the magnet 11252 and the receiver 11253. Too great a distance between the coil 1122 and the side wall of the receiver 11253 may result in the coil not being in the region of greater magnetic flux density of the magnetic circuit assembly 1125, reducing the power provided by the magnetic circuit assembly 1125 to the diaphragm 1121; too small a distance may risk the coil 1121 colliding with the receiver 11253. Thus, to avoid collisions of the coil 1121 and ensure that the magnetic field provides power to the diaphragm 1121, in some embodiments, the distance wt between the coil 1122 and the side walls of the magnet 11252 may be 0.1mm-0.25mm, and the distance ww between the coil 1122 and the circumferential side inner wall of the receiver 11253 may be 0.1mm-0.5mm in the above-described gap. In some embodiments, the distance wt between the coil 1122 and the side wall of the magnet 11252 may be 0.12mm-0.24mm, and the distance ww between the coil 1122 and the circumferential side inner wall of the receptacle 11253 may be 0.15mm-0.3mm. In some embodiments, in the above gap, the distance wt between the coil 1122 and the side wall of the magnet 11252 may be 0.17mm-0.21mm, and the distance ww between the coil 1122 and the circumferential side inner wall of the receiver 11253 may 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 0.2mm, and the distance ww between the coil 1122 and the circumferential side inner wall of the receptacle 11253 may be 0.2mm. Too large a distance h3 between the coil 1122 and the bottom 11253a of the receiving member 11253 causes the entire volume of the sound emitting portion 11 to become large, and too small a distance h3 between the coil 1122 and the bottom 11253a of the receiving member 11253 in the vibration direction of the diaphragm 1121 causes the risk of the coil 1121 colliding with the receiving member 11253. Thus, to avoid excessive volume of the sound emitting portion 11 while avoiding collision of the coil 1121, in some embodiments, the distance h between the coil 1122 and the bottom 11253a of the receiver 11253 ₃ (i.e., the distance between the end of the coil 1122 remote from the diaphragm 1121 and the bottom wall of the receiver 11253) may be 0.2mm to 4mm. In some embodiments, the distance h between the coil 1122 and the bottom wall of the pod 11253 ₃ May be 0.6mm to 3mm.In some embodiments, the distance h between the coil 1122 and the bottom wall of the pod 11253 ₃ May be 1mm to 2mm. In some embodiments, the distance h between the coil 1122 and the bottom wall of the pod 11253 ₃ May be 1.4mm to 1.6mm.

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 force applied by the coil 1122 is substantially consistent, and the low-frequency distortion of the sound generating portion 11 is adjusted, so that the low-frequency hearing feeling is richer. In addition, by designing the inclination angle β of the first inclined section 11211a with respect to the first connecting section 11211b, it is also possible to avoid the coil 1122 from overflowing to the folded-ring region 11212, to avoid corroding the folded-ring region 11212, and to influence the vibration of the folded-ring region 11212. The inclination angle β of the first inclined section 11211a with respect to the first connecting section 11211b refers to an angle between the first inclined section 11211a and a straight line of the first connecting section 11211b in a direction away from the first connecting section 11211b, as shown in fig. 10.

In some embodiments, to reduce the distortion level of the sound emitting portion 11, the inclination angle β of the first inclined section 11211a with respect to the first connecting section 11211b may be in the range of 5 ° -30 ° to avoid corroding the folded-over region 11212 and affecting the vibration of the folded-over region 11212. In some embodiments, to further reduce the distortion level of the sound emitting portion 11, the inclination angle β of the first inclined section 11211a with respect to the first connecting section 11211b may be in the range of 10 ° -25 °. For example, the first inclined section 11211a may be inclined at an angle β of 15 ° with respect to the first connecting section 11211 b. For another example, the first inclined section 11211a may be inclined at an angle β of 22 ° with respect to the first connecting section 11211 b.

In some embodiments, the minimum distance of the coil 1122 from the first inclined section 11212a is not less than 0.3mm, i.e., the distance between the connection point of the first inclined section 11212a to the first connection section 11211b and the connection region of the coil 1122 to the first connection section 11211b is not less than 0.3mm, so that the installation position of the folded-over region 11212 and the coil 1122 is kept at a safe distance, and the glue installed by the coil 1122 is prevented from overflowing to the folded-over region 11212.

In some embodiments, the tuck-loop region 11212 includes a second sloped section 11212a, the second sloped section 11212a at least partially conforming to the first sloped section 11211 a. The body region 11211 and the collar region 11212 are connected by a first inclined section 11211a and a second inclined section 11212 a. In some embodiments, to simplify the mounting process, the first inclined section 11211a and the second inclined section 11212a may be connected by glue. In some embodiments, to effect the connection of the body region 11211 to the garter region 11212, a second inclined segment 11212a may be provided on a side of the first inclined segment 11211a proximate to the coil 1122. In some embodiments, to achieve a connection of the body region 11211 to the collar region 11212, while at the same time to further reduce the extent of corrosion of the collar region 11212 by glue when the coil 1122 is bonded, a second inclined section 11212a may be provided on the side of the first inclined section 11211a facing away from the coil 1122.

Since the vibration amplitude of the diaphragm 1121 is large at low frequencies, if the folded ring region 11212 is of a planar structure, the deformability thereof is poor, and thus the vibration amplitude of the diaphragm 1121 is affected. Accordingly, in order to provide a better deformability of the diaphragm 1121, in some embodiments, the bellows region 11212 may include an arcuate segment 11212c.

In some embodiments, the height h of the arcuate segment 11212c ₁ And span w ₁ May affect the deformability of the arcuate segment 11212c. The height of the arc-shaped section 11212c refers to the distance between the highest point of the arc-shaped section 11212c and the lowest point of the arc-shaped section in the vibration direction of the diaphragm 1121. As shown in FIG. 10, the height of the arcuate segment 11212c is denoted as h ₁ . The span of the arcuate segment 11212c refers to the maximum distance between the upper two points of the arcuate segment 11212c. As shown in FIG. 10, the span of the arcuate segment 11212c is denoted as w ₁ . If the height h of the arc-shaped section 11212c ₁ And span w ₁ If the ratio of arc segments 11212c is too small, the shape may be close to a planar structure and the deformability may be poor. If the height h of the arc-shaped section 11212c ₁ And span w ₁ The ratio of the arc-shaped section 11212c is too large, the diaphragm 1121 is greatly hindered from vibrating, and the output of the sound generating section 11 is affected. Thus, in some embodiments, is The sound generating part 11 has better output and lower distortion, and the height h of the arc-shaped section 11212c ₁ And span w ₁ The ratio of (c) may be in the range of 0.35-0.4. In some embodiments, to further increase the output of the sound emitting portion 11, the height h of the arcuate segment 11212c ₁ And span w ₁ May be in the range of 0.36-0.39. In some embodiments, to further reduce distortion of the sound emitting portion 11, the height h of the arcuate segment 11212c ₁ And span w ₁ May be in the range of 0.37 to 0.38. For example, the height h of the arcuate segment 11212c ₁ And span w ₁ May be 0.38.

In some embodiments, the height h of the arcuate segment 11212c ₁ Can be in the range of 0.5mm to 0.7 mm. For example, the height h of the arcuate segment 11212c ₁ May be in the range of 0.55mm to 0.65 mm. In some embodiments, the height h of the arcuate segment 11212c ₁ May be 0.6mm. In view of error size, in some embodiments, the height h of the arcuate segment 11212c ₁ May be 0.6 mm.+ -. 0.05mm. In some embodiments, the span (width) w2 of the arcuate segment 11212c of the torus region 11212 may be less than twice the radius of curvature r 1. In some embodiments, the radius of curvature r1 of the arcuate segment 11212c of the garter region 11212 may be 0.7mm-0.9mm. In some embodiments, the radius of curvature r1 of the arcuate segment 11212c of the garter region 11212 may be 0.75mm-0.88mm. In some embodiments, the radius of curvature r1 of the arcuate segment 11212c of the garter region 11212 may be 0.8mm-0.83mm. In some embodiments, the arcuate segment 11212c of the tuck-ring region 11212 may span w1 from 1.2mm to 1.7mm. In some embodiments, the span w1 of the arcuate segment 11212c of the tuck-ring region 11212 may be 1.3mm-1.65mm. In some embodiments, the arcuate segment 11212c of the tuck-ring region 11212 may span w1 from 1.5mm to 1.6mm. In some embodiments, the radius of curvature r1 of the arcuate segment 11212c of the garter region 11212 may be 0.82mm and the span w1 of the arcuate segment 11212c of the garter region 11212 may be 1.58mm. In view of error size, in some embodiments, the radius of curvature r1 of the arcuate segment 11212c of the garter region 11212 may be 0.82mm±0.05mm and the span w1 of the arcuate segment 11212c of the garter region 11212 may be 1.58mm±0.1mm.

In some embodiments, the garter region 11212 may also include a wavy structure made up of a plurality of arcuate segments 11212c, wherein any two adjacent arcuate segments 11212c are oppositely oriented. The wavy structure can make the degree of obstruction of the upward vibration and the downward vibration of the diaphragm 1121 as symmetrical as possible in the vibration process, reduce the distortion degree of the sounding part 11, and promote the low-frequency output of the sounding part 11. In some embodiments, the height to span ratio of each arcuate segment 11212c of the plurality of arcuate segments 11212c may be consistent with the height to span ratio of the individual arcuate segments 11212c described above. In some embodiments, the height to span ratio of each arcuate segment 11212c of the plurality of arcuate segments 11212c may be different. For example, in the radial direction of the diaphragm 1121, the height of each arc-shaped segment 11212c of the plurality of arc-shaped segments 11212c may gradually decrease from the center to the edge of the diaphragm 1121, and each arc-shaped segment 11212c spans the same.

To constrain the diaphragm 1121 as it vibrates substantially, avoiding the coil 1122 from encountering the magnetic circuit assembly 1125, in some embodiments, the body region 11211 may include an arched dome 11211c at an end of the first connecting section 11211b remote from the first sloped section 11211a, with the arched dome 11211c being in the same direction as the arch of the arcuate section 11212c, i.e., the arched dome 11211c protruding toward the side remote from the coil 1122. The arched dome 11211c can prevent the diaphragm 1121 from shaking during the large vibration, and ensure that the coil 1122 and the magnetic assembly 1125 do not collide. At the same time, the dome 11211c of the dome shape also has higher strength and rigidity, suppressing the divided vibration of the main body region 11211 to some extent, thereby improving the high-frequency vibration characteristics of the transducer 112. Without the front cover, the dome aspect ratio (i.e., height and span ratio) increases, the high frequency bandwidth increases, but too high a dome aspect ratio results in increased non-uniformity and increased overall size.

In some embodiments, the height h of the dome 11211c ₂ The dimension of the dome 11211c in the direction of arcuate extension (i.e., span dimension w ₂ ) And (5) correlation. The height of the dome 11211c means that in the vibration direction of the diaphragm 1121, the highest point of the dome 11211c is located at the lowest point of the dome 11211c (i.e., at the first connecting section 11211b connected end points). As shown in FIG. 10, the height of the dome 11211c is h ₂ . The span of the dome 11211c refers to the maximum distance between the upper two points of the dome 11211 c. As shown in FIG. 10, the dome 11211c spans w ₂ . Span dimension w of dome 11211c ₂ The greater the height h of the dome 11211c in order to maintain the dome shape of the dome 11211c (e.g., such that the corresponding arc of the dome 11211c remains within a preset arc range) ₂ The larger may result in an overall thickness dimension of the transducer 112 that is excessive. Considering the overall thickness and structural design of the transducer 112, in some embodiments, the predetermined arc range corresponding to the dome 11211c of the body region 11211 of the diaphragm 1121 may be 0.5263rad-3.1416rad. In some embodiments, the predetermined arc range corresponding to the dome 11211c of the body region 11211 of the diaphragm 1121 may be 0.7869rad-3.1416rad. In some embodiments, the predetermined arc range corresponding to the dome 11211c of the body region 11211 of the diaphragm 1121 may be 1.0526rad-3.1416rad. In some embodiments, the predetermined arc range corresponding to the dome 11211c of the body region 11211 of the diaphragm 1121 may be 1.5789rad-3.1416rad. In some embodiments, the predetermined arc range corresponding to the dome 11211c of the body region 11211 of the diaphragm 1121 may be 2.1053rad-3.1416rad. In some embodiments, the predetermined arc range corresponding to the dome 11211c of the 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 body region 11211 may be 2mm-8mm. The width dimension w2 of the dome 11211c of the body region 11211 may be 3mm-7mm in some embodiments. The width dimension w2 of the dome 11211c of the body region 11211 may be 4mm-6mm in some embodiments. The width dimension w2 of the dome 11211c of the body region 11211 may be 4.8mm in some embodiments. In some embodiments, the height h2 of the dome 11211c of the 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 body region 11211 may be 0.9mm-1.1mm. In some embodiments, the height h2 of the dome 11211c of the body region 11211 may be 1mm-1.05mm. In some embodiments The height h2 of the dome 11211c of the body region 11211 may be 0.8mm. In some embodiments, the height h2 of the dome 11211c of the body region 11211 may be 0.8mm±0.08mm due to machining errors.

In some embodiments, the height h of the dome 11211c ₂ And span w ₂ May affect the overall size of the sound emitting portion 11 and the vibration of the diaphragm 1121. If the height h of the dome 11211c ₂ And span w ₂ The ratio of the top 11211c is too small, the shape of the top 11211c is close to a plane structure, the strength and rigidity of the top 11211c are low, the top 11211c is easy to generate split vibration, more peaks and valleys are generated in a high-frequency area, and the high-frequency vibration characteristics of the transducer 112 are affected. If the height h of the dome 11211c ₂ And span w ₂ If the ratio of the dome 11211c is too large, the overall thickness dimension of the transducer 112 may be too large and the unevenness and overall dimensions may also increase. Therefore, in order to provide the sound generating portion 11 with an appropriate thickness dimension as a whole, the high-frequency vibration characteristics of the sound generating portion 11 are improved, and the height h of the dome 11211c is increased ₂ And span w ₂ The ratio of (2) may be in the range of 0.1-0.6. In some embodiments, to further improve the high frequency vibration characteristics of the transducer 112, the height h of the dome 11211c ₂ And span w ₂ The ratio of (2) may be in the range of 0.1-0.4. In some embodiments, to further improve the high frequency vibration characteristics of the transducer 112, the height h of the dome 11211c ₂ And span w ₂ The ratio of (2) may be in the range of 0.1-0.3.

In some embodiments, considering the structural strength, difficulty in process implementation, and limitation of the overall thickness of the sound generating part 11 in combination, the maximum amplitude of the diaphragm 1121 is satisfied, so that the diaphragm 1121 does not collide with the magnetic conductive plate 11251 during vibration, and the distance (distance hd shown in fig. 9) between the lowest point of the dome 11211c of the body region 11211 of the diaphragm 1121 to the top of the magnetic conductive plate 11251 in the magnetic circuit assembly 1125 may be greater than 0.8mm in the vibration direction of the diaphragm. In some embodiments, the spacing hd between the lowest point of the dome 11211c of the body region 11211 of the diaphragm 1121 and the top of the magnetically permeable plate 11251 in the magnetic circuit 1125 may be 0.85mm-0.95mm, i.e., 0.9mm±0.05mm. Wherein, 0.9mm is the structural dimension, and 0.05mm is the error range dimension. In some embodiments, the spacing hd between the lowest point of the dome 11211c of the body region 11211 of the diaphragm 1121 and the top of the magnetically permeable plate 11251 in the magnetic circuit 1125 may be 0.86mm-0.93mm. In some embodiments, the spacing hd between the lowest point of the dome 11211c of the body region 11211 of the diaphragm 1121 and the top of the magnetically permeable plate 11251 in the magnetic circuit 1125 may be 0.88mm-0.92mm.

Fig. 11A is an exemplary high frequency bandwidth schematic of a sound emitting portion shown in accordance with some embodiments of the present description. As shown in fig. 11A, in the frequency response curve of the sounding part 11, there is a first inflection point f in the low frequency region ₀ ，f ₀ Approximately at 300 Hz. f (f) ₀ The degree of softness of the annular region 11212 of the diaphragm 1121 and the vibration weight (mainly the weight of the main body region 11211) are related. Second inflection point f _h Is about 25kHz, f _h Can be determined from the overall trend of the frequency response curve. At f _h After=25 kHz, the curve has a locally small peak, but overall is in a downward trend. Selecting f ₀ And f _h Peak values of the frequency bands between (i.e. between 300Hz and 25 kHz) and taking the average value to form a first reference line L _m As the upper straight line in FIG. 11A, the reference straight line is lowered by 10dB to form a second straight line L _n (lower line in FIG. 11A), i.e., the selected bandwidth is 100Hz-45kHz.

In some embodiments, the frequency of the high frequency split vibration of the diaphragm 1121 is proportional to E/ρ. Where E is the Young's modulus of the diaphragm 1121 and ρ is the equivalent density of the diaphragm 1121. Thus E/p may 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, and the larger the E/ρ, 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, and the larger the high-frequency division vibration frequency of the diaphragm 1121, the wider the high-frequency bandwidth.

In some embodiments, the region of the high-frequency division vibration of the sound emitting portion 11 refers to a region in which the frequency response drops sharply and peaks and valleys occur alternately after the frequency response curve reaches the highest peak. As shown in fig. 11A, the frequency response curve reaches the highest peak (i.e., f _h Corresponding toSound pressure level) the frequency response drops sharply and f of peaks and troughs alternately appear _h The right region is the high-frequency division vibration region. The frequency at which the corresponding curve reaches the highest peak is the frequency at which the high-frequency split vibration occurs (f as shown in FIG. 11A _h ). In some embodiments, to avoid large differences in vibration of different portions of the main body region 11211, resulting in poor high-frequency effects, the frequency of the high-frequency split vibration of the main body region 11211 (dome 11211 c) may be designed such that the diaphragm 1121 has a wide high-frequency bandwidth while reducing the occurrence of the high-frequency split vibration in the bandwidth region. In some embodiments, the frequency of the high frequency split vibration of the dome 11211c may be not lower than 20kHz. For example, the frequency of the high-frequency division vibration of the dome 11211c may be not lower than 25kHz. In some embodiments, to ensure that the output of the body region 11211 is high in the active band, the mass of the body region 11211 needs to be small to reduce the difficulty of vibration of the body region 11211 in the active band. Therefore, the main body region 11211 may be made of a material or structure with a low density and high strength. Accordingly, the Young's modulus of the dome 11211c may be not less than 6GPa. In some embodiments, the Young's modulus of dome 11211c may be in the range of 6GPa-7 GPa. For example, the Young's modulus of dome 11211c may be 6.5GPa. Young's modulus of dome 11211c may be measured by a static method or a dynamic method (e.g., pulse excitation method, acoustic resonance method, sonic velocity method, etc.).

In some embodiments, the body region 11211 may be made of a carbon fiber material. Fig. 11B is a schematic diagram of a woven structure of exemplary carbon fibers shown in accordance with some embodiments of the present disclosure. The carbon fiber material has a low density and high strength, which is advantageous for attenuating high-order modes of the speaker 112. In some embodiments, to further increase the strength of the body region 11211, and reduce the equivalent density of the body region 11211, the body region 11211 may be formed from carbon fiber interlacing, at least some of which are at a first angular stagger. In some embodiments, the first angle is in the range of 45 ° -90 °. For example, the weaving of the plurality of independent carbon fibers may be warp-weft interlaced at any angle of 45 °, 60 °, 90 °, or the like. As shown in fig. 11B, the plurality of carbon fibers 112111 and the plurality of 112112 may be interwoven at an angle of approximately 90 °. In some embodiments, the plurality of carbon fibers 112111 and the plurality of 112112 may be laid at an angle of approximately 90 ° and connected by gluing due to the thinness of the carbon fibers. In some embodiments, the body region 11211 may include a multi-layer (e.g., 2 layers, 3 layers, etc.) carbon fiber interwoven structure. To facilitate the interlacing of the carbon fibers, in some embodiments, the length of the individual carbon fibers is no less than 5mm. In some embodiments, the length of the individual carbon fibers may be in the range of 5mm-10 mm. For example, the length of the individual carbon fibers may be 7mm. Because the single carbon fiber is too thin, the difficulty of weaving one by one is high, and the weaving is not easy to realize. In some embodiments, multiple carbon fibers may be laid together (e.g., joined by gluing, etc.) to form multiple groups of carbon fibers, with the multiple groups of carbon fibers being woven in a warp and weft staggered arrangement.

In some embodiments, to reduce the weight of the body region 11211, the thickness of the body region 11211 in super-tandem carbon fiber construction may be designed to achieve a selected high frequency bandwidth. In some embodiments, the thickness of the body region 11211 may be less than 80 μm. In some embodiments, the thickness of the body region 11211 may be in the range of 10 μm-60 μm. In some embodiments, the thickness of the body region 11211 may be 25 μm.

Fig. 12 is a schematic diagram of the amplitude of the sounding portion at different driving voltages according to some embodiments of the present disclosure. As shown in fig. 12, at the same voltage, the vibration amplitudes of the vibration of the diaphragm 1121 of the transducer 112 in two opposite directions (positive and negative directions in the thickness direction X shown in fig. 6, i.e., positive and negative directions of the ordinate axis in fig. 12) are different due to the asymmetry of the diaphragm 1121. In fig. 12, the unit Vrms represents an effective voltage value of the sinusoidal ac signal, and for example, 0.7Vrms represents an effective voltage value of the input sinusoidal ac signal of 0.7V. As shown in fig. 12, in the range of 0.4V to 0.7V of the input voltage, the vibration film 1121 vibrates in the downward direction (negative direction to the ordinate axis) more than in the upward direction (positive direction to the ordinate axis) (about 0.8 mm). Wherein 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 assembly 1125). As shown in fig. 12, as the input voltage continues to increase (e.g., from 0.7V to 1V), the amplitude variation amplitude of the diaphragm 1121 gradually becomes smaller and eventually approaches a threshold value, wherein the amplitude of downward vibration of the diaphragm 1121 approaches a first threshold value (about 0.9 mm), and the amplitude of upward vibration approaches a second threshold value (about 0.8 mm). Since the amplitude of downward vibration of the diaphragm 1121 is larger than that of upward vibration, the amplitudes of the diaphragm 1121 appearing in this specification all refer to the larger amplitude of downward vibration of the diaphragm 1121. In some embodiments, to avoid the coil 1122 colliding with the magnetic circuit assembly 1125 during vibration of the diaphragm 1121, it may be designed to limit the maximum amplitude of the diaphragm 1121 to no more than 0.8mm, i.e., the amplitude of the diaphragm 1121 may be in the range of 0mm-0.8 mm. In some embodiments, the amplitude of the diaphragm 1121 may be in the range of 0mm-0.75 mm. In some embodiments, the amplitude of the diaphragm 1121 may be in the range of 0mm-0.7 mm.

In some embodiments, the difference in amplitude of vibration of the diaphragm 1121 in two opposite directions (i.e., up and down) may be less than 0.05mm in the amplitude range of 0mm-0.8mm to reduce the degree of distortion of the transducer 112. In some embodiments, to further reduce the distortion level of the transducer 112, the difference in the amplitudes of the vibrations of the diaphragm 1121 in two opposite directions (i.e., up and down) may be less than 0.04mm. In some embodiments, to further reduce the distortion level of the transducer 112, the difference in the amplitudes of the vibrations of the diaphragm 1121 in two opposite directions (i.e., up and down) may be less than 0.03mm.

Referring to fig. 8 and 9, in some embodiments, a support 1123 is disposed around the magnetic circuit assembly 1125. As shown in fig. 9, the bracket 1123 may include a first portion 112311, a second portion 11232, and a third portion 11233 along the vibration direction of the diaphragm. The first portion 112311 refers to a portion from the highest point D of the region where the holder 1123 is connected to the diaphragm 1121 to the highest point of the region where the holder 1123 is connected to the receiver 11253 in the vibration direction of the diaphragm 1121. The second portion 11232 refers to a region of the support 1123 where ventilation holes are formed, and as shown in fig. 9, the second portion 11232 refers to a portion between the highest point of the connection region of the support 1123 and the receiving element 11253 and the sidewall of the support 1123 where the bottom of the ventilation holes are located (i.e., toward the bottom 11253a of the receiving element 11253) along the vibration direction of the diaphragm 1121. The third portion 11233 refers to the portion between the sidewall of the bottom of the vent hole in the bracket 1123 and the bottom of the bracket 1123 near the magnetic circuit assembly 1125 (i.e., near the bottom 11253a of the receiver 11253). As shown in fig. 10, a second connecting section 11212b is provided at an end of the folded ring region 11212 remote from the main body region 11211, for connecting to the bracket 1123. The second connecting section 11212b is disposed parallel to the short axis direction Z and perpendicular to the vibration direction of the diaphragm. In some embodiments, the first portion 112311 of the bracket 1123 is connected to the second connecting segment 11212b of the tuck-ring region 11212. In some embodiments, the second connecting section 11212b of the folded-over region 11212 is connected to the first portion 112311 of the support 1123 by a securing ring 1155 to effect securing of the diaphragm 1121 to the support 1123.

Fig. 13 is a partial structural exemplary structural view of the rear chamber shown according to some embodiments of the present specification. Referring to fig. 6 and 13, in some embodiments, a connection frame 115 may be disposed in the housing 111, and a second acoustic cavity may be enclosed between the connection frame 115 and the support 1123 of the transducer 112, where the second acoustic cavity may be used as the rear cavity 116. The rear cavity 116 is isolated from other structures (e.g., a main control circuit board, etc.) within the housing 111, which is advantageous for improving the acoustic performance of the sound emitting portion 11. Wherein, the casing 111 is provided with a pressure relief hole (for example, the first pressure relief hole 111c and/or the second pressure relief hole 111 d), and the connecting frame 115 is provided with an acoustic channel 1151 that communicates the pressure relief hole and the rear cavity 116, so that the rear cavity 116 is communicated with the external environment, that is, air can freely enter and exit the rear cavity 116, thereby being beneficial to reducing the resistance of the diaphragm 1121 of the transducer 112 in the vibration process.

In some embodiments, the cross-section of the rear cavity 116 may be formed of two perpendicular sides and a curved side, connecting the two ends of the curved side, the cross-section (e.g., cross-section ABC) may be considered approximately a triangle. Wherein the oblique side AC is formed by a line connecting two end points formed by a curved surface formed on the connecting frame 115 and two straight sides of the support 1123. In some embodiments, the first portion 1 of the support 1123 Thickness h of 12311 in the vibration direction of the diaphragm 1121 ₄ The volume of the rear cavity 116 may be affected. Thickness h of first portion 112311 ₄ Increasing, in the case where the volume of the entire sound emitting portion 11 is unchanged, the volume of the rear cavity 116 decreases; accordingly, the thickness h of the first portion 112311 ₄ The volume of the rear chamber 116 increases as it decreases. In some embodiments, the thickness of the first portion 112311 of the support 1123 can affect the volume of the rear cavity 116 and, thus, the resonant frequency of the rear cavity 116. In some embodiments, the rear cavity 116 may refer to a cavity formed by the rear side of the diaphragm, in which case the thickness h of the first portion 112311 of the support 1123 ₄ Increasing, in the case where the volume of the entire sound emitting portion 11 is unchanged, the volume of the rear cavity 116 increases; accordingly, the thickness h of the first portion 112311 ₄ The volume of the rear chamber 116 decreases.

In some embodiments, the combination of the back volume 116 and the relief aperture (e.g., the first relief aperture 111c and/or the second relief aperture 111 d) provided in the housing 111 may be considered a helmholtz resonator model. Wherein, the rear cavity 116 can be used as a cavity of the Helmholtz resonator model, the pressure relief hole can be used as a neck of the Helmholtz resonator model, and the resonance frequency of the Helmholtz resonator model is the resonance frequency f of the rear cavity 116 ₂ . In the helmholtz resonator model, the volume of the cavity (e.g., the rear cavity 116) may affect the resonant frequency f of the cavity (e.g., the rear cavity 116), as shown in equation (1):

where c represents the speed of sound, S represents the cross-sectional area of the neck (e.g., relief hole), V represents the volume of the cavity (e.g., rear cavity 116), and L represents the depth of the neck (e.g., relief hole).

As can be seen from the formula (1), when the sectional area S of the relief hole (e.g., the first relief hole 111c and/or the second relief hole 111 d) and the depth L of the relief hole are unchanged, the volume of the rear cavity 116 increases, and the resonant frequency f of the rear cavity 116 ₂ Reducing, i.e. moving towards, low frequencies.

FIG. 14 is a drawing of some of the following descriptionThe different first portions 112311 shown in the embodiments have a thickness that corresponds to the frequency response profile of the rear cavity. As can be taken from fig. 14, the thickness h of the first portion 112311 of the bracket 1123 follows ₄ Gradually increasing from 0.3mm to 3mm, the volume of the rear cavity 116 gradually increases, and the resonance peak of the rear cavity 116 gradually moves toward low frequency, so that the flat range of the frequency response curve decreases, and the output performance of the sound generating portion 11 is affected.

If the thickness h of the first portion 112311 ₄ Too small, the amplitude of the diaphragm 1121 is limited by the support 1123, if the thickness h of the first portion 112311 ₄ Too large causes the overall size of the sound generating unit 11 to be too large, and the resonance peak of the rear cavity 116 to be shifted to a low frequency, so that the flat area range of the frequency response curve of the rear cavity 116 is reduced, and the sound quality of the sound generating unit 11 is affected. The thickness of the first portion 112311 refers to the minimum distance between the connection area of the bracket 1123 and the gimbal region 11212 and the area directly attached to the magnetic circuit assembly 1125 in the vibration direction of the diaphragm 1121.

In some embodiments, to provide a higher low frequency output from the sound emitting portion 112 and a wider range of flat areas for the frequency response curve of the rear cavity 116, the thickness h of the first portion 112311 of the bracket 1123 ₄ Can be in the range of 0.3mm-3 mm. In some embodiments, to further boost the low frequency output of the transducer 112, the thickness h of the first portion 112311 ₄ Can be in the range of 0.5mm-2 mm. In some embodiments, to further increase the flat area of the frequency response curve of the back cavity 116, the thickness h of the first portion 112311 ₄ Can be in the range of 0.8mm-1 mm. In some embodiments, the thickness h of the first portion 112311 ₄ May be 0.9mm, where the resonance peak of the rear cavity 116 is near 6.1kHz, the sounding part 11 has a good low frequency output, and the frequency response curve of the rear cavity 116 has a broad flat area.

In some embodiments, the weight of transducer 112 is primarily related to support 1123 and magnetic circuit assembly 1125, wherein the weight of magnetic circuit assembly 1125 is relatively large. In some embodiments, the weight of the support 1123 increases, and in the case where the material of the support 1123 is unchanged, this indicates that the size of the support 1123 increases, which may correspond to an increase in the area of the diaphragm 1121. In some embodiments, the increased weight of the magnetic circuit assembly 1125 increases the magnetic induction near the coil 1122 and increases the driving force generated by the coil, thereby increasing the vibration amplitude of the diaphragm 1121 and providing the transducer 112 with higher sensitivity and better low frequency effects. However, if the weight of the transducer 112 is too large, the weight 11 of the sound emitting portion 11 is too large, which affects the wearing stability and comfort of the open earphone 10.

In combination of the above two wearing situations that at least part of the sound emitting portion 11 shown in fig. 3 covers the antitragus region and the whole or part of the sound emitting portion 11 shown in fig. 4 extends into the concha cavity, the volume that can be heard by the ear 100 increases (corresponding to higher sound emitting efficiency), so that 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 earphone 10 has higher wearing stability and comfort. In some embodiments, the weight of the transducer 112 may be in the range of 1.1g-3.3 g. In some embodiments, to further enhance the sensitivity and low frequency output of the transducer 112, the weight of the transducer 112 may be in the range of 1.5g-3 g. In some embodiments, to further enhance the wearing stability and comfort of the open earphone 10, the weight of the transducer 112 may be in the range of 2g-2.5 g. In some embodiments, the weight of the transducer 112 may be 2.2g.

Fig. 15 is a graph of frequency response of a sound emitting portion at different driving voltages according to some embodiments of the present description. The diaphragm surface of the speaker 112 is opposite to the test microphone with a distance of 4mm, and a voltage in the range of 0.1V-0.7V is applied to the speaker 112, and the test frequency range is set to 20Hz-20000Hz, so that a frequency response curve of the speaker 112 at different driving voltages can be obtained (as shown in fig. 15). Referring to fig. 12 and 15, the amplitude of the diaphragm 1121 is in the range of 0mm to 0.8mm when the input voltage is in the range of 0.1V to 0.7V and the frequency is in the range of 20Hz to 6.1 kHz. At this time, in order to prevent vibration of the coil 1122 from contacting the bottom 11253a of the receiver, the distance h between the bottom of the coil 1122 and the bottom 11253a of the receiver ₃ And (as shown in figure 9) may be greater than 0.8mm. In some embodimentsIn order to make the size of the sounding part 11 smaller and to improve the comfort of the user when wearing the device, the distance h between the bottom of the coil 1122 and the bottom 11253a of the holder is set to be smaller ₃ (as shown in fig. 9) may not exceed 0.9mm. Thus, at an input voltage of 0.1V-0.7V, the distance h from the bottom of the coil 1122 to the bottom 11253a of the pod is in the range of 20Hz-6.1kHz ₃ (as shown in FIG. 9) may be in the range of 0.8mm to 0.9mm.

As shown in fig. 15, as the input voltage gradually increases from 100mV to 700mV, the output of the sounding part 11 gradually increases, and the sensitivity gradually increases, but the resonance peak frequency is substantially unchanged, and is located near 6.1 kHz. Combining the above two wearing cases of the sound emitting portion 11 shown in fig. 3, in which at least part of the sound emitting portion 11 covers the antihelix region, and the whole or part of the sound emitting portion 11 shown in fig. 4 extends into the concha cavity, by the distance h from the bottom of the coil 1122 to the bottom 11253a of the holder ₃ When the thickness of the sound emitting portion 11 is controlled in the range of 0.8mm to 0.9mm (as shown in FIG. 9), the sound emitting portion has high sensitivity. As shown in fig. 15, when the input voltage is 100mV to 700mV, the Sound Pressure Level (SPL) of the sound emitting portion 11 is in the range of 85dB to 103dB at a frequency of 1 kHz.

In some embodiments, as previously noted, the thickness h of the first portion 112311 of the support 1123 ₄ In the range of 0.3mm-3 mm. When the thickness h of the first portion 112311 ₄ Increasing to 3mm, the corresponding resonant frequency f of the rear cavity 116 ₂ The frequency is reduced to 3.3kHz, so that the range of a flat area is reduced, and the tone quality is affected. In some embodiments, to increase the extent of the flat region and improve the quality of the sound emitting portion 11, the thickness h of the first portion 112311 ₄ May be less than 3mm, the resonant frequency f of the rear cavity 116 ₂ May be not less than 3.3kHz. In some embodiments, to further improve the sound quality of the sound generating portion 11, the resonant frequency f of the rear cavity 116 ₂ May be not less than 3.5kHz. In some embodiments, to further improve the sound quality of the sound generating portion 11, the resonant frequency f of the rear cavity 116 ₂ May be not less than 4kHz. In some embodiments, to further improve the sound quality of the sound generating portion 11, the resonant frequency f of the rear cavity 116 ₂ May be not less than 6kHz.

In some embodiments, the volume of the rear cavity 116 is according to equation (1)Can influence the resonant frequency f of the rear cavity 116 ₂ . And the volume of the rear cavity 116 is determined by h of the thickness of the first portion 112311 of the bracket 1123 ₄ Is a function of (a) and (b). H through the thickness of the first portion 112311 ₄ Is within the range of the resonant frequency f of the rear cavity 116 ₂ A range of values for the volume of the rear chamber 116 may be determined. In some embodiments, the volume of the rear cavity 116 may be 60mm ³ -110mm ³ 。

Fig. 16 is a schematic illustration of exemplary positions of a bracket and first and second relief holes according to some embodiments of the present disclosure. As shown in fig. 16, in some embodiments, a plurality of ventilation holes 11231 are formed in the support 1123. The ventilation holes 11231 are arranged, so that sound on the back surface of the diaphragm 1121 can be transmitted to the rear cavity 116 and the pressure relief holes through the ventilation holes 11231 and transmitted to the outside, and good channels for radiating sound are provided on both sides of the diaphragm 1121.

In some embodiments, the plurality of ventilation holes 11231 may be asymmetrically designed to better balance the air flow, to balance the air pressure within the rear cavity 116. For example, the plurality of ventilation holes 11231 may be asymmetrically arranged centering on the short axis of the support 1123. Specifically, the support 1123 is provided with a first ventilation hole 11231a and a second ventilation hole 11231b. As shown in fig. 16, a distance La between the center of the first ventilation hole 11231a and the center of the second pressure release hole 111d is greater than a distance Lb between the center of the second ventilation hole 11231b and the center of the second pressure release hole 111 d. In some embodiments, the air pressure of the rear chamber 116 is relatively high at a position farther from the second pressure release hole 111d, and thus, in order to balance the air pressure in the rear chamber 116, the area of the first air vent 11231a is larger than that of the second air vent 11231b. That is, in order to balance the air pressure in the rear chamber 116, the area of the vent hole that is closer to the second relief hole 111d (or the first relief hole 111 c) is smaller, and the area of the vent hole that is farther from the second relief hole 111d (or the first relief hole 111 c) is larger. The distance between the vent 11231 and the pressure relief hole refers to the distance between the center of the vent 11231 and the center of the corresponding pressure relief hole. In this specification the center of the vent or pressure relief hole refers to the geometric center of the hole-like structure.

In the rear chamber 116, the air pressure is relatively high at a position far from the first pressure relief hole 111c and/or the second pressure relief hole 111d, so that the area of the air vent 11231 can be set larger; at a position closer to the first pressure relief hole 111c and/or the second pressure relief hole 111d, the air pressure is lower, and thus the area of the air vent 11231 may be set smaller. If the areas of the plurality of ventilation holes 11231 are the same, the air pressure in the rear cavity 116 is higher at the position far away from the first pressure relief hole 111c and/or the second pressure relief hole 111d, and the air pressure in the rear cavity 116 cannot be balanced well due to the smaller area of the ventilation holes 11231, so that the air resistance received by the vibrating diaphragm 1121 is larger. Similarly, the diaphragm 1121 experiences less resistance to vibration at a location within the rear cavity 116 that is proximate to the first relief aperture 111c and/or the second relief aperture 111 d. Thereby causing the diaphragm 1121 to be unevenly stressed and making the diaphragm 1121 unstable in vibration. Therefore, the low frequency vibration of the sound emitting part 11 can be made smoother by adjusting the size of the area of the ventilation holes 11231.

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 applied to the vibrating diaphragm 1121 during vibration, the total area of the air holes 11231 can affect the output performance of the sound generating part 11. And the ratio of the total area of the plurality of ventilation holes 11231 to the projected area of the diaphragm 1121 along the vibration direction may 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 large, and the air resistance received by the diaphragm 1121 during vibration will be large, so as to affect the low-frequency output performance of the diaphragm 1121. When the ratio of the total area of the plurality of ventilation holes 11231 to the projected area of the diaphragm 1121 along the vibration direction reaches a certain threshold value, the ratio is increased again, and the influence variation of the air in the rear cavity 116 on the vibration of the diaphragm 1121 is weakened, and the structural strength of the bracket is influenced. Therefore, in some embodiments, in order to provide uniform and small air resistance when the diaphragm 1121 vibrates, and ensure good output performance of the sound emitting portion 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 may be in the range of 0.008-0.3. In some embodiments, 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 vibrating direction may be in the range of 0.1-0.25. In some embodiments, 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 vibrating direction may be in the range of 0.11-0.23.

FIG. 17 is a graph showing the frequency response of the rear cavity for different total vent areas according to some embodiments of the present disclosure. Wherein, the different total areas of the vent holes 11231 can be realized by the operation of blocking the vent holes 11231 using the plasticine. The diaphragm surface of the speaker 112 is opposite to the test microphone, the distance is 4mm, a voltage of 0.4V is applied to the speaker 112, and the test frequency range is set to 20Hz-20000Hz, so that the frequency response curve of the speaker 112 under different vent areas can be obtained (as shown in FIG. 17). Wherein, 0mm ² Refers to the case where the ventilation holes 11231 are completely blocked, i.e., the bracket is not perforated. As shown in FIG. 17, the total area of the ventilation holes 11231 is 0mm ² Gradually increase to 4.54mm ² The frequency response curve of the rear cavity 116 gradually shifts up in the low frequency (e.g., 100Hz-1000 Hz) region, i.e., the low frequency response of the rear cavity 116 gradually increases. When the total area of the ventilation holes 11231 is from 4.54mm ² Gradually increase to 12.96mm ² The low frequency response of the rear cavity 116 does not change significantly during the process. This is because when the total area of the ventilation holes 11231 is increased to a certain area (e.g., 4.54mm ² ) After that, the influence of the air in the rear chamber 116 on the vibration of the diaphragm 1121 gradually decreases under the low frequency vibration, so that even if the total area of the ventilation holes 11231 is increased again, the influence on the frequency response curve of the low frequency region of the rear chamber 116 is not large.

As shown in FIG. 17, the total area of the ventilation holes 11231 is 0mm ² Gradually increase to 12.96mm ² The resonant peak of the rear cavity 116 gradually shifts to a high frequency, and the frequency response curve in the low frequency region (e.g., 100Hz-1000 Hz) gradually flattens. In some embodiments, to provide a good low frequency response for the rear cavity 116, the total area of the acoustically transparent apertures 11231 can be 4.54mm ² -12.96mm ² Within the range. In some embodimentsFor good low frequency response of the rear cavity 116, the total area of the sound-transmitting holes 11231 may be 5mm ² -11mm ² Within the range. In some embodiments, to provide a good low frequency response for the rear cavity 116, the total area of the acoustically transparent apertures 11231 can be 7mm ² -10mm ² Within the range. In some embodiments, to provide a good low frequency response for the rear cavity 116, the total area of the acoustically transparent apertures 11231 can be 8mm ² -10mm ² Within the range.

In some embodiments, in order to increase structural strength, a plurality of ventilation holes 11231 may be formed in the support 1123, and a connection portion between the plurality of ventilation holes 11231 forms a reinforcing rib. In some embodiments, in case that the total area of the ventilation holes 11231 is satisfied, the number of ventilation holes 11231 may be set to only one in order to simplify the ventilation process.

In some embodiments, the bottom 11253a or the side wall 11253b of the accommodating element 11253 of the magnetic circuit assembly 1125 may also be provided with a plurality of ventilation holes. Sound from the back of the diaphragm 1121 may be transmitted to the rear cavity 116 and the pressure relief hole through a plurality of vent holes, which provide good channels for radiating sound at both sides of the diaphragm 1121.

In some embodiments, the projected area of the diaphragm 1121 in the vibration direction affects the amount of air pushed by the diaphragm 1121 when vibrating, thereby affecting the efficiency of sound generated by the vibration of the diaphragm 1121 and affecting the acoustic output effect of the sound generating portion 11. If the projected area of the diaphragm 1121 in the vibration direction is too small, the amount of air that the diaphragm 1121 vibrates and pushes is small, and the acoustic output effect of the sound generating portion 11 is poor. If the projection area of the diaphragm 1121 in the vibration direction is too large, the size of the support 1123 is too large, so that the weight of the support 1123 is increased, the weight of the sound generating part 11 is large, the structure and the weight of the sound generating part 11 are affected, and the wearing comfort and the stability are affected. In combination with the at least partial coverage of the antitragus region by the sound emitting portion 11 shown in fig. 3 and the two wearing cases in which the whole or part of the sound emitting portion 11 extends into the concha cavity shown in fig. 4, the volume that the ear 100 can hear increases (corresponding to higher sound emitting efficiency), so that the size of the diaphragm 1121 may not need to be excessively large. In some embodiments, the sound emitting hole 111a is disposed on the side wall of the housing 111 of the sound emitting portion 11 near the ear of the user, and the sound emitting hole 111a is disposed on the front side of the diaphragm 1121 and is in communication with the front cavity 114, where the vibration direction of the diaphragm 1121 is equal to or approximately equal to the thickness direction X of the sound emitting portion 11, and the projection area of the diaphragm 1121 in the vibration direction is equal to or approximately equal to the projection area of the diaphragm 1121 in the sagittal plane, and the projection area of the diaphragm 1121 in the vibration direction may affect the projection area of the sound emitting portion 11 in the sagittal plane of the user. The overlapping ratio of the projection area of the sounding part 11 on the sagittal plane of the user and the projection area of the concha cavity on the sagittal plane can influence the cavity-like structure formed by the sounding part 11 extending into the concha cavity, thereby influencing the acoustic output effect of the sounding part 11. Further, the major and minor dimensions of the diaphragm 1121 may affect the major and minor dimensions of the projection of the sound generating portion 11 in the sagittal plane.

In some embodiments, considering that at least part of the sound generating portion 11 shown in fig. 3 covers the antihelix area and the whole or part of the sound generating portion 11 shown in fig. 4 extends into the concha cavity, in order to enable the sound generating portion 11 to have good acoustic output, the projection of the sound generating portion 11 on the sagittal plane has a suitable area or the sound generating portion 11 has a suitable thickness, the projection area of the diaphragm 1121 in the vibration direction may be 90mm ² -560mm ² . Preferably, the projected area of the diaphragm 1121 in the vibration direction may be 120mm ² -300mm ² . Preferably, the projection area of the diaphragm 1121 in the vibration direction may be 150mm ² -200mm ² 。

Considering both the above-described case where at least a part of the sound-emitting portion 11 shown in fig. 3 covers the antitragus region and the case where the whole or a part of the sound-emitting portion 11 shown in fig. 4 extends into the concha cavity, in order to make the diaphragm 1121 have an area as large as possible within the limited size of the sound-emitting portion 11, thereby enhancing the acoustic output performance of the sound-emitting portion 11, in some embodiments, when the vibration direction of the diaphragm 1121 is parallel to the thickness direction X of the sound-emitting portion 11, the ratio of the projection area of the diaphragm 1121 in the vibration direction of the diaphragm (i.e., the projection area of the diaphragm 1121 on the sagittal plane) to the projection area of the casing 111 in the vibration direction of the diaphragm (i.e., the projection area of the casing 111 on 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 portion 11, thereby enhancing the acoustic output performance of the sound emitting portion 11, the ratio of the projected area of the diaphragm 1121 in the vibration direction of the diaphragm to the projected area of the housing 111 in the vibration direction of the diaphragm may be not less than 0.8. In some embodiments, the diaphragm 1121 is made to have an area as large as possible, thereby enhancing the acoustic output performance of the sound emitting portion 11, and the ratio of the projected area of the diaphragm 1121 in the vibration direction of the diaphragm to the projected area of the case 111 in the vibration direction of the diaphragm may be in the range of 0.8 to 0.95.

In some embodiments, in combination with the above-described wearing of the sound-emitting portion 11 at least partially covering the antihelix region, as shown in fig. 3, the major axis of the diaphragm 1121 may have a size in the range of 13mm-25mm, and the minor axis of the diaphragm may have a size in the range of 4mm-13 mm. In connection with the wearing mode of the sound generating portion 11 shown in fig. 4 in which the whole or part extends into the concha cavity, in order to facilitate the whole or part of the sound generating portion 11 extending into the concha cavity to form an effective cavity-like body, the short axis dimension of the diaphragm 1121 may be in the range of 4mm-13 mm. Based on the size of the short axis, the projected area of the diaphragm 1121 (for example, the projected area of the diaphragm 1121 in the vibration direction is 52mm ² -325mm ² In the range) further determines that the major axis dimension of the diaphragm 1121 is in the range of 13mm-25 mm. For example, the major axis dimension of the diaphragm 1121 may be in the range of 15mm-20mm and the minor axis dimension of the diaphragm may be in the range of 5mm-10 mm. As another example, the major axis of the diaphragm 1121 may be in the range of 17mm-18mm and the minor axis of the diaphragm may be in the range of 7mm-8 mm.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the present disclosure, and therefore, such modifications, improvements, and adaptations are intended to be within the spirit and scope of the exemplary embodiments of the present disclosure.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.

Furthermore, those skilled in the art will appreciate that the various aspects of the application are illustrated and described in the context of a number of patentable categories or circumstances, including any novel and useful procedures, machines, products, or materials, or any novel and useful modifications thereof. Accordingly, aspects of the application may be performed entirely by hardware, entirely by software (including firmware, resident software, micro-code, etc.) or by a combination of hardware and software. The above hardware or software may be referred to as a "data block," module, "" engine, "" unit, "" component, "or" system. Furthermore, aspects of the application may take the form of a computer product, comprising computer-readable program code, embodied in one or more computer-readable media.

The computer storage medium may contain a propagated data signal with the computer program code embodied therein, for example, on a baseband or as part of a carrier wave. The propagated signal may take on a variety of forms, including electro-magnetic, optical, etc., or any suitable combination thereof. A computer storage medium may be any computer readable medium that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code located on a computer storage medium may be propagated through any suitable medium, including radio, cable, fiber optic cable, RF, or the like, or a combination of any of the foregoing.

The computer program code necessary for operation of portions of the present application may be written in any one or more programming languages, including an object oriented programming language such as Java, scala, smalltalk, eiffel, JADE, emerald, C ++, c#, vb net, python, etc., a conventional programming language 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 code may execute entirely on the user's computer or as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or processing device. In the latter scenario, the remote computer may be connected to the user's computer through any form of network, such as a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet), or the use of services such as software as a service (SaaS) in a cloud computing environment.

Furthermore, the order in which the elements and sequences are presented, the use of numerical letters, or other designations are used in the application is not intended to limit the sequence of the processes and methods unless specifically recited in the claims. While certain presently useful embodiments have been discussed in the foregoing disclosure by way of various examples, it is to be understood that such details are for the purpose of illustration only and that the appended claims are not limited to the disclosed embodiments, but rather are intended to cover all modifications and equivalent combinations that fall within the spirit and scope of the embodiments of the present application. For example, while the system components described above may be implemented by hardware devices, they may also be implemented solely by software solutions, such as installing the described system on an existing processing device or mobile device.

Similarly, it should be appreciated that in order to simplify the present disclosure and thereby facilitate an understanding of one or more embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure. This method of disclosure, however, is not intended to imply that more features than are required by the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations in some embodiments for use in determining the breadth of the range, in particular embodiments, the numerical values set forth herein are as precisely as possible.

Each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited herein is hereby incorporated by reference in its entirety. Except for the application history file that is inconsistent or conflicting with this disclosure, the file (currently or later attached to this disclosure) that limits the broadest scope of the claims of this disclosure is also excluded. It is noted that the description, definition, and/or use of the term in the appended claims controls the description, definition, and/or use of the term in this application if there is a discrepancy or conflict between the description, definition, and/or use of the term in the appended claims.

Finally, it should be understood that the detailed description of the application is merely exemplary, and that one or more features of the detailed description are optional or additional and do not constitute essential features of the inventive concepts. In other words, the scope of the application encompasses and is much greater than the specific embodiments.

Claims

1. A sound emitting portion comprising:

a vibrating diaphragm;

a magnetic circuit assembly; and

the coil is connected with the vibrating diaphragm and is at least partially positioned in a magnetic gap formed by the magnetic circuit assembly, the vibrating diaphragm is driven to vibrate after the coil is electrified to generate sound, wherein,

the vibrating diaphragm includes main part region and encircles the regional ring area that turns over that sets up of main part, main part region include first slope section and with the first linkage segment that the coil is connected, first slope section with the regional partial region laminating of turning over the ring, just first slope section for first linkage segment is to deviating from the direction slope of coil.

2. The sound emitting portion of claim 1, wherein the folded-over region includes a second sloped section that at least partially conforms to the first sloped section.

3. The sound emitting portion of claim 2, wherein the second inclined section is located on a side of the first inclined section facing away from the coil.

4. The sound generating section of claim 1 wherein the grommet region comprises an arcuate segment having a height to span ratio in the range of 0.35-0.4.

5. The sound generating portion according to claim 1, wherein an inclination angle of the first inclined section with respect to the first connecting section is in a range of 5 ° -30 °, the first connecting section being perpendicular to a vibration direction of the diaphragm.

6. The sound generating section of claim 4 wherein the body region includes a dome located at an end of the first connecting section remote from the first angled section, the dome spanning between 2mm and 8mm, the dome having a height in the range of 0.7mm to 1.2 mm.

7. The sound generating portion of claim 1, further comprising a bracket disposed around the magnetic circuit assembly, a first portion of the bracket being connected to a second connecting section of the gimbal region.

8. The sound generating section according to claim 1, wherein a major axis dimension of the diaphragm is in a range of 13mm to 25mm, and a minor axis dimension of the diaphragm is in a range of 4mm to 13 mm.

9. The sound generating portion according to claim 1, wherein a minimum distance of the coil from the first inclined section is not less than 0.3mm.

10. The sound generating portion according to claim 1, wherein the magnetic circuit assembly includes a receiving member, and a distance between a bottom of the coil and a bottom wall of the receiving member is in a range of 0.2mm to 4mm in a vibration direction of the diaphragm.