Open type earphone

Abstract

The invention discloses an open type earphone. The open type earphone comprises a fixing structure and a sound production structure connected with the fixing structure, wherein the fixing structure is used for enabling the sound production structure to be arranged on the front side of the ear of a user in a wearing state; wherein the sound production structure comprises a sound production shell and a sound production unit, and the sound production shell is provided with a sound production part and a pressure relief part; the sounding unit is arranged in the sounding shell and divides the internal space of the sounding shell into a front cavity and a rear cavity, the sounding part is communicated with the front cavity, and the pressure relief part is communicated with the rear cavity. Wherein the pressure relief part is closer to the ear canal opening of the ear than the sound production part. According to the technical scheme, sound leakage of the front side of the ear can be effectively reduced, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of earphones, and in particular to an open earphone. Background Art

[0002] Currently, open-type earphones are attached to the outside of the ear canal, and the earphones do not block the ear canal, which ensures that consumers can hear the sound of the earphones as well as the sound of the outside world, improving safety and comfort. However, since they are open-type earphones, the speaker to the ear canal opening is not sealed, and the earphones leak sound quite seriously. Summary of the invention

[0003] The embodiment of the present application provides an open-type earphone that can achieve a better effect of suppressing sound leakage.

[0004] An embodiment of the present application provides an open-type earphone, the open-type earphone comprising a fixing structure and a sound-generating structure connected to the fixing structure, wherein the fixing structure is used to arrange the sound-generating structure in front of the ear of the user in a wearing state; wherein the sound-generating structure comprises:

[0005] A sound-generating housing, comprising a sound-generating portion and a pressure-relieving portion; and

[0006] A sound-generating unit is disposed in the sound-generating housing and divides the internal space of the sound-generating housing into a front cavity and a rear cavity, wherein the sound-generating portion is connected to the front cavity and the pressure-relieving portion is connected to the rear cavity;

[0007] In the wearing state, the pressure relief portion is closer to the ear canal opening of the ear than the sound-generating portion.

[0008] In the open earphones according to the embodiment of the present application, the sounds emitted from the sound-emitting part and the pressure-releasing part have opposite phases, which can cancel each other out. In the embodiment of the present application, the pressure-releasing part is closer to the ear canal opening than the sound-emitting part, so as to cancel each other out to a certain extent between the sound-emitting part and the ear canal opening, thereby effectively reducing sound leakage from the front side of the ear and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0010] Figure 1 This is a schematic structural diagram of an embodiment of an open-type earphone of the present application;

[0011] Figure 2 for Figure 1Schematic diagram of the wearing state of the open-type earphones in combination with the ears;

[0012] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the sound-producing structure;

[0013] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of the middle sound unit;

[0014] Figure 5 for Figure 2 Schematic diagram of the structure of the middle ear;

[0015] Figure 6 for Figure 1 A schematic diagram of another perspective of the fit of the open-back earphone with the ear;

[0016] Figure 7 A schematic diagram of the human body for reference;

[0017] Figure 8 is a schematic cross-sectional structure diagram of another embodiment of a sound-generating structure;

[0018] Fig. 9 for Figure 1 A schematic diagram of the structure of the open-back headphones from another perspective;

[0019] Fig.10 for Figure 1 A partial structural diagram of the vocalization structure from another perspective;

[0020] Fig.11 for Figure 1 A schematic diagram of the cross-sectional structure of the sound-producing structure from another perspective;

[0021] Fig.12 This is a schematic cross-sectional structure diagram of an embodiment of the diversion structure of the present application;

[0022] Fig.13 This is a structural schematic diagram of another embodiment of the diversion structure of the present application;

[0023] Fig.14 This is a structural schematic diagram of another embodiment of the diversion structure of the present application;

[0024] Fig.15 This is a structural diagram of another embodiment of the diversion structure of the present application.

[0025] Description of Figure Numbers:

[0026]

[0027]

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0030] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0031] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] Currently, open-type earphones are attached to the outside of the ear canal, and the earphones do not block the ear canal, which ensures that consumers can hear the sound of the earphones as well as the sound of the outside world, improving safety and comfort. Because they are open-type earphones, the speaker to the ear canal opening is not sealed, and the earphones leak sound more seriously.

[0034] To solve the above problems, the present application proposes an open-type earphone 100, which may be an air conduction earphone. An air conduction earphone has a built-in sound unit, and a hole is opened on the sound cavity for directional sound conduction.

[0035] It can be understood that the open earphone 100 should have at least a wearing state, where the open earphone 100 fits with the user's ear so that it can be relatively fixed to the ear. In this state, the user can obtain a relatively ideal listening effect.

[0036] Please refer to Figure 1 One embodiment of the present application proposes an air conduction open-type earphone 100. Compared with a bone conduction earphone, the air conduction open-type earphone 100 can provide higher quality sound, and because the sound is transmitted in a direction, the sound leakage will also be smaller.

[0037] Please refer to Figure 1 and Figure 2 The open earphone 100 includes a fixed structure 10 and a sound-generating structure 30 connected to the fixed structure 10. The fixed structure 10 includes a hanging portion 13 and a rear end portion 11. The hanging portion 13 is connected to the sound-generating structure 30 and is used to be hung between the upper side of the ear 200 and the user's head in the wearing state; the rear end portion 11 is arranged at one end of the hanging portion 13 away from the sound-generating structure 30 and is used to be attached to the rear side of the ear 200 and the user's head in the wearing state. The hanging portion 13 is curved in an arc shape and forms a hook shape. The hanging portion 13 and the rear end portion 11 are in contact with at least the front and rear sides of the ear 200 to achieve fixation with the ear 200, so that the sound-generating structure 30 connected to one end of the hanging portion 13 can be relatively stably arranged on the front side of the ear 200. It can be understood that the hanging portion 13 and the rear end portion 11 are provided with a certain elasticity so that the user can bend the hanging portion 13 and / or the rear end portion 11 to match the fixed structure 10 with the ear 200. When the open earphone 100 is worn on the ear 200 , the sound generating structure 30 covers the ear canal opening 200 a of the ear 200 and does not extend into the ear canal opening 200 a of the ear 200 .

[0038] Optionally, the fixed structure 10 includes a fixed shell, and the sound-generating structure 30 includes a sound-generating shell 31. The fixed shell and the sound-generating shell 31 may be two detachably connected parts, or the fixed shell and the sound-generating shell 31 may be formed together during processing.

[0039] Please refer to Figure 3The sound-generating structure 30 is used to generate sound and enable the sound to be conducted to the ear canal opening 200a of the ear 200 through the air. The sound-generating structure 30 also includes a sound-generating unit 33 disposed in the sound-generating shell. To facilitate manufacturing and assembly, the sound-generating shell 31 generally includes a front shell 311 and a rear shell 313. When the front shell 311 and the rear shell 313 are docked together, the two enclose an installation space. The sound-generating unit 33 is disposed in the installation space. The sound-generating unit 33 and the front shell 311 form a front cavity 31a, and the sound-generating unit 33 and the rear shell 313, or the sound-generating unit 313 and part of the front shell 311 form a rear cavity 31b. The front shell 311 is provided with a sound-generating portion 31c, and the sound-generating portion 31c is connected to the front cavity 31a. The rear shell 313 is provided with a pressure relief portion 31d, and the pressure relief portion 31d is connected to the rear cavity 31b. The sound-generating portion 31c can be set as an opening or a hole (sound-generating hole 31c1), and the pressure-releasing portion 31d can also be set as an opening or a hole (pressure-releasing hole 31d1), without specific limitation. The sound-generating unit 33 is provided with a diaphragm 331, and the vibration of the diaphragm 331 drives the air to vibrate, so that the air can conduct sound through the sound-generating portion 31c.

[0040] It can be understood that the open earphone 100 also includes a main control board 35 and a battery. The main control board 35 is connected to the rear shell 313 and is electrically connected to the sound unit 33 to control the vibration of the diaphragm 331 of the sound unit 33 to produce sound. The battery is also electrically connected to the main control board 35 to provide power to the sound unit 33. Batteries generally have a large mass. In the embodiment of the present application, the battery is arranged at the rear end 11, and can cooperate with the sound structure 30 to make the weight distribution of the open earphone 100 more uniform, so that in the wearing state, the sound structure 30 and the battery are arranged on the front and back sides of the ear 200, which is more comfortable and reliable to wear.

[0041] Please refer to Figure 4 The sound unit 33 includes a basin frame 337, a magnetic circuit system 335, a vibration system and a suspension member 339. The basin frame 337 is provided with a receiving cavity 337a and an opening communicating with the receiving cavity 337a. The magnetic circuit system 335 is disposed in the receiving cavity 337a and connected to the basin frame 337. The vibration system includes a diaphragm 331 and a voice coil assembly 333. The diaphragm 331 covers the opening and is connected to the basin frame 337. The voice coil assembly 333 is located in the receiving cavity 337a and is connected to the diaphragm 331. Specifically in one embodiment, the magnetic circuit system 335 includes a first magnet 3351 and a second magnet 3353. The second magnet 3353 is disposed around the first magnet 3351, and a magnetic gap 335a is disposed between the first magnet 3351 and the second magnet 3353. The voice coil assembly 32 is inserted into the magnetic gap 335a. The suspension member 339 is located in the accommodating cavity 337 a , and is disposed along a direction intersecting the axial direction AA of the voice coil assembly 333 . The suspension member 339 is connected to the basin frame 337 and the voice coil assembly 333 .

[0042] Specifically, taking the opening located above the accommodating cavity 337a as an example, the voice coil assembly 333 is located in the accommodating cavity 337a, and the diaphragm 331 covers the opening of the accommodating cavity 337a, the voice coil assembly 333 is connected to the diaphragm 331, and the diaphragm 331 has a vertical force on the voice coil assembly 333; the suspension member 339 has an inclined force on the voice coil assembly 333, and at this time, the voice coil assembly 333 has two forces in different directions. Among them, the embodiment of the present application does not limit the intersection angle between the setting direction of the suspension member 339 and the axial direction AA of the voice coil assembly 333. Preferably, the suspension member 339 is set along the direction perpendicular to the axis of the voice coil assembly 333, that is, the setting direction of the suspension member 339 is perpendicular to the axial direction AA of the voice coil assembly 333. By setting the suspension member 339, the suspension member 339 and the diaphragm 331 can simultaneously exert force on the voice coil assembly 333, increasing the force points of the voice coil assembly 333, thereby reducing the polarization of the voice coil, and reducing the scratches between the voice coil assembly 333 and the magnetic circuit system 335 and the basin frame 337. Since the polarization of the voice coil assembly 333 is smaller, the gap size between the voice coil assembly 333 and the magnetic circuit system 335 can also be set smaller, so that the voice coil assembly 333 is closer to the magnetic line of force dense area of ​​the magnetic circuit system 335, and the Lorentz force on the voice coil assembly 333 when it is powered on is greater, so that the driving efficiency of the sound unit 33 is higher, the vibration amplitude of the diaphragm 331 can be larger, and the output sound is louder.

[0043] For example, the diaphragm 331 is provided with an amplitude greater than or equal to 0.5 mm and less than 2.0 mm. The diaphragm 331 pushes the air through an amplitude greater than 0.5 mm, which can achieve a high low-frequency sound pressure level and a subjective sense of deep diving and bass shock, thereby compensating to a certain extent for the problem of serious bass loss caused by the diffusion of low-frequency sound outwards when the open earphone 100 has high sound leakage.

[0044] The vibration of the diaphragm 331 can make the air in the front cavity 31a and the rear cavity 31b vibrate with opposite phases. Therefore, the sounds emitted from the sound-emitting part 31c and the pressure-releasing part 31d have opposite phases and can cancel each other to a certain extent, thereby reducing sound leakage. This cancellation is characterized by a strong near-end cancellation effect and a weak far-end cancellation effect, which is in line with the design of reducing sound leakage.

[0045] Please refer to Figure 3 , Figure 5 and Figure 6In the embodiment of the present application, the sound-emitting portion 31c faces the ear 200. To ensure the listening effect, in the wearing state, the sound-emitting portion 31c is located in the concha cavity 200b of the ear 200, but does not extend into the ear canal opening 200a of the ear 200, and is spaced apart from the ear canal opening 200a of the ear 200, thereby making full use of the space of the ear 200 close to the ear canal opening 200a, forming a space for scattering and reverberation, and obtaining a better listening effect. In the embodiment of the present application, when the user wears the open earphone 100, the pressure relief portion 31d is closer to the ear canal opening 200a of the ear 200 than the sound-emitting portion 31c. In the wearing state, the sound-emitting shell 31 is at a considerable distance from the ear canal opening 200a of the ear 200, so as to less block the external sound from entering the ear canal opening 200a of the ear 200. Obviously, sound leakage is more likely to occur between the sound-generating structure 30 and the ear canal opening 200a of the ear 200. In the embodiment of the present application, the pressure relief portion 31d is closer to the ear canal opening 200a of the ear 200 than the sound-generating portion 31c, so as to cancel out the sound between the sound-generating portion 31c and the ear canal opening 200a of the ear 200 to a certain extent, thereby more effectively reducing the sound leakage near the ear canal opening 200a of the ear 200 on the front side of the ear 200, thereby improving the user experience.

[0046] Please refer to Figure 7 As is known to all, in the fields of medicine and anatomy, three basic planes of the human body, namely the sagittal plane, the coronal plane and the horizontal plane, and three basic axes, namely the sagittal axis, the coronal axis and the vertical axis, can be defined. The sagittal plane refers to a plane perpendicular to the ground along the front-back direction of the body, which divides the human body into left and right parts; the coronal plane refers to a plane perpendicular to the ground along the left-right direction of the body, which divides the human body into front and back parts; the horizontal plane refers to a plane parallel to the ground along the up-down direction of the body, which divides the human body into upper and lower parts. Accordingly, the sagittal axis refers to an axis perpendicular to the coronal plane along the front-back direction of the body, the coronal axis refers to an axis perpendicular to the sagittal plane along the left-right direction of the body, and the vertical axis refers to an axis perpendicular to the horizontal plane along the up-down direction of the body.

[0047] Please refer to Figure 6 and Figure 7 In one embodiment of the present application, when the wearer is in the wearing state, the opening direction of the pressure relief portion 31d has an angle α with the vertical axis of the user, satisfying the relationship: 0°≤α≤40°. This can prevent the pressure relief hole 31d1 from facing directly forward, prevent the user or others from hearing the sound coming from the pressure relief hole 31d1, and further reduce the sound leakage from the front side of the ear 200.

[0048] For example, in the wearing state, the pressure relief hole 31d1 may be arranged to open roughly toward the front side of the tragus 202 of the ear 200 .

[0049] For another example, the pressure relief portion 31d is disposed near the bottom of the rear shell 313, so that the pressure relief hole 31d1 can face the front side of the intertragus notch 204 of the ear 200 in the wearing state. The tragus 202, the intertragus notch 204 and the antitragus 203 of the ear 200 often form a notch-shaped structure, and the notch is located near the ear canal opening 200a of the ear 200 and communicates with the concha cavity 200b of the ear 200. Therefore, a considerable part of the sound near the ear canal opening 200a of the ear 200 is likely to leak from the notch. In the embodiment of the present application, the pressure relief portion 31d faces the front side of the intertragus notch 204 of the ear 200 in the wearing state, and can perform more targeted anti-phase cancellation of the sound there, thereby more comprehensively reducing the sound leakage in the front side of the ear 200.

[0050] Of course, in the wearing state, the pressure relief hole 31d1 can also be arranged roughly toward the front side of the screen notch of the ear 200 or a higher position of the ear 200, and the present application does not impose any limitation on this.

[0051] Furthermore, the pressure relief portion 31d is extended along the circumference of the rear shell 313. For example, the pressure relief portion 31d is roughly elliptical, and the pressure relief portion 31d can be provided with one pressure relief hole 31d1, or multiple pressure relief holes 31d1 can be provided, and the multiple pressure relief holes 31d1 are arranged along the extension direction of the pressure relief portion 31d. In this way, the pressure relief portion 31d can cover a larger edge range, thereby achieving a more comprehensive sound leakage prevention effect.

[0052] Please refer to Figure 8 In one embodiment of the present application, the rear shell 313 includes a rear shell body 3131 and a rear cavity cover 3133. The rear shell body 3131 is connected to the front shell 311, and the pressure relief portion 31d is provided on the rear shell body 3131. The rear shell body 3131 is formed in a cover shape, and its outer contour can be circular or square, which is not limited in the embodiment of the present application. The periphery of the rear shell body 3131 is connected to the periphery of the front shell 311, and the rear cavity cover 3133 is provided on the side of the rear shell body 3131 facing the sound unit 33 to separate the space between the rear shell body 3131 and the sound unit 33 into a rear cavity 31b and an installation space. Among them, the installation space is formed by the rear cavity cover 3133 and the rear shell body 3131 or the rear shell body 3131 and part of the front shell 311, and the installation space is used to accommodate other accessories such as the main control board 35. The rear cavity 31b is formed by the rear cavity cover 3133 and the sound generating unit 33, and a pressure relief passage 31e connecting the rear cavity 31b and the pressure relief hole 31d1 is formed together with the rear cavity 31b.

[0053] Exemplarily, the rear cavity cover 3133 includes a bottom plate and a surrounding plate arranged on the periphery of the bottom plate, the bottom plate is arranged between the sound unit 33 and the rear shell body 3131, and the surrounding plate is extended relative to the bottom plate toward the front shell 311. The front shell 311 is provided with a limiting step arranged along its own circumference, and the surrounding plate is connected with the limiting step. In this embodiment, the bottom plate and the surrounding plate are spaced apart from the sound unit 33 to enclose and form the above-mentioned rear cavity 31b.

[0054] As a possible structural form, the pressure relief portion 31d is arranged on one side of the rear shell body 3131, and the rear shell body 3131 is also provided with a baffle arranged opposite to the pressure relief portion 31d. The baffle is arranged at intervals with the pressure relief portion 31d, so as to form a section of channel arranged along the extension direction of the baffle toward the front shell 311, and the channel is connected to the pressure relief hole 31d1. A connecting port is provided at the junction of the bottom plate and the enclosure near the baffle of the rear cavity cover 3133. It can be understood that the connecting port can be provided on the bottom plate, or formed by the bottom plate and the enclosure. Along the extension direction of the enclosure, the rear cavity cover 3133 is formed with another section of channel, which is arranged corresponding to and connected to the connecting port, and is connected to the rear cavity 31b. As a result, the above two sections of channels are connected through the connecting port, and are combined to form a pressure relief channel 31e arranged on the peripheral side of the sound unit 33 and extending along the thickness direction of the sound structure 30.

[0055] The design of the pressure relief channel 31e ensures that the air load in the rear cavity 31b is not immediately leaked out of the sound shell 31 through the pressure relief hole 31d1. When the sound unit 33 is working, each vibration of the diaphragm 331 will push as much air in the rear cavity 31b as possible to vibrate, thereby increasing the volume of the air and thus the quality of the air.

[0056] According to the formula:

[0057] Among them, f0 represents the resonance frequency, Mm represents the vibration mass, and the design of the pressure relief channel 31e can increase Mm to a certain extent, thereby reducing the resonance frequency f0 and improving the low-frequency performance of the open earphone 100 to a certain extent.

[0058] Of course, the embodiment of the present application does not limit the structural form of the pressure relief channel 31e. For example, the two end channels forming the pressure relief channel 31e can be coaxial or non-coaxial. When they are non-coaxial, the complexity of the pressure relief channel 31e can be appropriately increased, and the low-frequency performance can be further improved. The extension direction of the pressure relief channel 31e and the axis of the pressure relief portion 31d can be roughly in the same direction or at a certain angle. When the two are arranged at a certain angle, according to the end effect of the pipeline, the pressure relief channel 31e can be made longer to a certain extent, thereby increasing the volume of the resonant air in the rear cavity 31b, thereby improving the low-frequency performance.

[0059] Please continue to refer to Figure 8In order to further improve the low-frequency performance of the open earphone 100, in the thickness direction of the sound-emitting shell 31, there is a distance L3 between the center of the diaphragm 331 and the sound-emitting portion 31c, and there is a distance L4 between the center of the diaphragm 331 and the pressure relief portion 31d, satisfying the relationship L4≥1.05L3. In other words, the center of the diaphragm 331 is farther from the pressure relief portion 31d than the sound-emitting portion 31c, and the distance of the air from the vicinity of the diaphragm 331 to the pressure relief portion 31d is longer, that is, the volume and weight of the gas in the back cavity 31b driven by the vibration of the diaphragm 331 are larger, so that the vibration mass Mm can be increased, and the resonance frequency f0 can be further reduced, thereby improving the low-frequency sound effect of the earphone.

[0060] Optionally, the rear shell body 3131 may be provided with a pressure relief hole 31d1, and the rear shell body 3131, the rear cavity cover 3133 and the sound unit 33 constitute at least two pressure relief channels 31e, and at least two pressure relief channels 31e are connected to one pressure relief hole 31d1, so that the air in the rear cavity 31b can be quickly discharged to the outside of the sound shell 31 through at least two pressure relief channels 31e while ensuring the low-frequency performance of the earphone.

[0061] In order to prevent foreign matter from entering the pressure relief channel 31e and the rear cavity 31b through the pressure relief hole 31d1, the pressure relief hole 31d1 is covered with a porous mesh structure, which includes but is not limited to a metal mesh, a porous etched decorative metal sheet, and a woven mesh.

[0062] Alternatively, the rear shell body 3131 is provided with at least two pressure relief holes 31d1 to form a porous structure, and the rear cavity cover 3133 and the sound unit 33 are provided with at least two pressure relief channels 31e. Among them, one pressure relief hole 31d1 is connected to at least one pressure relief channel 31e. In other words, at least two pressure relief holes 31d1 can be connected to at least two pressure relief channels 31e in a one-to-one correspondence, or one pressure relief hole 31d1 can correspond to at least two pressure relief channels 31e. In this way, without using a porous mesh structure, the low-frequency performance of the earphone and the smoothness of the exhaust of the pressure relief hole 31d1 are guaranteed, which is conducive to reducing material costs.

[0063] Please refer to Figures 8 to 10 In the embodiment of the present application, the sound-emitting housing 31 is provided with a sound-guiding structure 311a, and the sound-guiding structure 311a includes a first surface 311b and a second surface 311c surrounding the first surface 311b. Fig.10 As shown, the sound-emitting shell 31 has a thickness direction CC, and defines a reference plane perpendicular to the thickness direction CC. The first surface 311b is set at an angle γ with the reference plane, and the second surface 311c is set at an angle with the first surface 311b. In one embodiment, in the wearing state, the reference plane is parallel to the sagittal plane of the human body, that is, in this embodiment, the first surface 311b is also set at an angle γ with the sagittal plane.

[0064] So, along Fig. 9 In the up and down direction of the view shown, the thickness of the sound guide structure 311a gradually increases, on the side of the sound-emitting shell 31 facing the ear 200, so that the sound guide structure 311a protrudes outward compared to other parts of the sound-emitting shell 31. In the wearing state, the sound guide structure 311a can extend further into the concha cavity 200b of the ear 200 than other parts of the sound-emitting shell 31, and the sound-emitting portion 31c is arranged on the sound guide structure 311a, and can be specifically arranged on at least one of the first surface 311b and the second surface 311c. That is to say, the sound-emitting portion 31c can be arranged only on the first surface 311b or the second surface 311c, or can be arranged on both the first surface 311b and the second surface 311c. Arranging the sound-emitting portion 31c on the sound guide structure 311a is conducive to using the concha cavity 200b of the ear 200 as a reverberation space, thereby improving the listening effect.

[0065] Among them, 0°<γ≤20°, specifically, the angle γ can be set to 5 degrees, 10 degrees, 15 degrees or 20 degrees, etc., and this application does not limit this. Limiting the angle γ to be greater than 0 degrees and less than or equal to 20 degrees can make the sound guide structure 311a have a certain degree of protrusion while not occupying too much space near the ear canal opening 20a of the ear 200, which is conducive to reducing the thickness of the sound shell 31 and improving the product competitiveness.

[0066] In some embodiments, at least part of the sound-emitting portion 31c is disposed on the first surface 311b, and the first surface 311b is disposed toward the ear canal opening 200a of the ear 200. In the wearing state, the inclined first surface 311b will make the sound-emitting portion 31c more toward the ear canal opening 200a of the ear 200, thereby improving the directivity of the sound, so that the sound emitted from the sound-emitting hole 31c1 can be transmitted to the ear canal opening 200a of the ear 200 more directly and comprehensively, thereby effectively improving the sound pressure level of the sound received by the human ear, and the sound is clearer. It can be understood that if γ is 0° or γ>20°, the sound-emitting portion 31c will deviate more from the ear canal opening 200a of the ear 200, resulting in a poor listening effect.

[0067] Please refer to Fig. 9 and Fig.10 In some other embodiments, the first surface 311b faces the inner wall of the concha cavity 200b of the ear 200, and the second surface 311c can be extended in an arc shape or in a ring shape for aesthetics. The sound-emitting portion 31c is provided on the second surface 311c. When worn, the second surface 311c covers the ear canal opening 200a of the ear 200, and the sound emitted from the sound-emitting portion 31c can enter the ear canal opening 200a of the ear 200.

[0068] Please refer again Figure 8 In one embodiment, in order to improve the low-frequency performance of the earphone, the sound-emitting housing 31 includes a housing body and a passive radiation film 315. Specifically, the housing body is formed with the above-mentioned sound guide structure 311a and is provided with the above-mentioned first surface 311b and second surface 311c. The first surface 311b is provided with a mounting opening 31f connected to the front cavity 31a. Optionally, the mounting opening 31f is a circular opening. The passive radiation film 315 can be connected to the housing body and block the mounting opening 31f.

[0069] The passive radiation film 315 can be connected to the sound shell 31 around the mounting opening 31f by adhesive or fixing parts, and the passive radiation film 315, the shell body and the sound unit 33 form the front cavity 31a. The passive radiation film 315 can vibrate together with the vibration of the diaphragm 331 of the sound unit 33 and drive the air in the front cavity 31a to vibrate.

[0070] According to the formula:

[0071] Wherein, f0 represents the resonance frequency, and Mm represents the vibration mass. It can be understood that the passive radiation membrane 315 is provided to increase the vibration mass Mm, thereby reducing the resonance frequency f0, obtaining a resonance peak at a low frequency, increasing the low-frequency sound pressure level of the earphone, and improving the low-frequency performance of the open earphone 100.

[0072] Further, in one embodiment, the passive radiation membrane 315 includes a membrane body 3151 and a counterweight 3153. The membrane body 3151 is adapted to the shape of the mounting port 31f and is slightly larger than the mounting port 31f, so as to be more tightly connected to the shell body around the mounting port 31f and block the mounting port 31f. The counterweight 3153 is arranged on the side of the membrane body 3151 facing the front cavity 31a. To ensure the consistency of vibration, the counterweight 3153 is located in the middle of the membrane body 3151. In the embodiment of the present application, the counterweight 3153 is arranged on one side of the passive radiation membrane 315, thereby further increasing the vibration mass Mm and further reducing the resonance frequency f0. Exemplarily, the resonance frequency of the passive radiation membrane 315 is less than or equal to 100 Hz, which can improve low-frequency sound and hearing.

[0073] In one embodiment, the normal direction of the first surface 311b and the normal direction of the second surface 311c are arranged at an angle β, wherein 0°≤β≤70°. It can be understood that if β is 0°, the first surface 311b and the second surface 311c are arranged substantially coplanar and are arranged together toward the concha cavity 200b of the ear 200. If 0°<β≤70°, that is, the first surface 311b and the second surface 311c are arranged at a certain angle, due to the limited space of the ear 200, when the first surface 311b is arranged toward the inner wall of the concha cavity 200b of the ear 200, the second surface 311c inclined relative to the first surface 311b can face the ear canal opening 200a of the ear 200, and at the same time, a relatively sufficient volume of the front cavity 31a can be ensured without interference, thereby improving the sound performance. If β>70°, too large an angle may affect the space of the front cavity 31a. Therefore, in the embodiment of the present application, the angle β between the normal direction of the first surface 311b and the normal direction of the second surface 311c is limited to 0°≤β≤70°, which is beneficial to improving the sound performance.

[0074] Furthermore, the second surface 311c has a distance L1 between it and the antihelix 201 of the ear 200 in the wearing state, 0mm<L1≤15mm. It can be understood that in this way, the second surface 311c can avoid contacting the antihelix 201 so that the sound hole 31c1 is not blocked, and at the same time, a part of the space of the ear canal opening 200a of the ear 200 can be fully utilized for sound scattering and reverberation, thereby facilitating a better listening effect.

[0075] Moreover, the second surface 311c has a distance L2 from the ear canal opening 200a of the ear 200 in the wearing state, and 1mm≤L2≤40mm. It can be understood that if L2 is less than 1mm, it will affect the user's ability to distinguish external sounds. If L2 is greater than 50mm, the sound outlet is too far from the ear canal opening 200a of the ear 200, and the user may not be able to fully hear the sound emitted from the sound outlet. Therefore, the embodiment of the present application stipulates 1mm≤L2≤40mm, which can not only ensure that the earphone is in an open state and the user can hear the external sounds, but also make the open earphone 100 have a better sound effect.

[0076] For further information, please refer to Fig. 9 In the embodiment of the present application, the sound-emitting portion 31c is arranged in a fan shape, and the center of the circle corresponding to the fan shape is located in the middle of the front shell 311. The sound-emitting portion 31c is distributed close to the edge of the sound guide structure 311a. When worn, the sound-emitting portion 31c can better cover the ear canal opening 200a of the ear 200, thereby further improving the listening effect of the open earphone 100.

[0077] Optionally, the sound-emitting portion 31c is provided with a sound-emitting hole 31c1 with a fan-shaped opening. To prevent foreign matter from entering the front cavity 31a through the sound-emitting hole 31c1, the sound-emitting portion 31c is covered with a porous mesh structure, which includes but is not limited to a metal mesh, a porous etched decorative metal sheet, and a woven mesh.

[0078] Please continue to refer to Fig. 9 In another possible implementation of the present application, the sound-emitting portion 31c includes a plurality of sound-emitting holes 31c1 connected to the front cavity 31a to form a porous structure. The plurality of sound-emitting holes 31c1 are evenly arranged on the second surface 311c and along the extension direction of the sound-emitting portion 31c.

[0079] like Fig.11 As shown, due to the scattering and diffraction of sound waves, the sound waves emitted by each sound hole 31c1 diverge in a fan shape, and the sound wave fans of multiple sound holes 31c1 will overlap. Since the earphone is close to the ear canal, and the superimposed sound waves are all transmitted from the sound holes 31c1 and have the same phase, the superimposed area can enhance the sound, making the sound heard by the user clearer.

[0080] Please combine again Figure 3 Optionally, the sound hole 31c1 has a hole depth L and a hole diameter D, satisfying the relationship: L / D>0.35. It can be understood that if the aspect ratio L / D is less than or equal to 0.35, the scattering angle of the sound wave is large, and the embodiment of the present application limits L / D>0.35, which can obtain a smaller sound wave scattering angle, better sound wave directivity, and improve the user's listening effect.

[0081] To further improve the user experience, please refer to Figures 12 to 15 The open earphone 100 is further provided with a shunt structure 317, which is provided at the sound-emitting portion 31c to cooperate with the sound-emitting shell 31 to form at least two sound-emitting ports 31c11, so that sound waves can propagate outside the sound-emitting shell 31 through the at least two sound-emitting ports 31c11.

[0082] It can be understood that the sound-emitting part 31c is provided with an assembly port, and the assembly port is connected to the front cavity 31a. The diverter structure 317 can be integrally formed in the assembly port, and the assembly port is divided into at least two sound-emitting ports 31c11. In other structural forms, the diverter structure 317 can also be a structure independent of the sound-emitting shell 31, including a cover structure and an assembly body. The cover structure is used to cover the side of the sound-emitting shell 31 facing the ear 200, and at least cover the sound-emitting part 31c. The assembly body protrudes into the sound-emitting shell 31 relative to the cover structure and extends into the assembly port. Among them, the assembly body itself can be provided with a sound-emitting port 31c11, or the assembly body and the inner wall structure of the assembly port can form the sound-emitting port 31c11, so that the sound-emitting port 31c11 can be connected to the front cavity 31a, and the embodiments of the present application do not make any restrictions on this.

[0083] In actual use, since the diaphragm 331 has a large amplitude during operation, the air flow rate is likely to be too fast, which easily leads to turbulence, so that the sound transmitted outward through the sound-emitting portion 31c will carry turbulent noise, affecting the user's auditory experience. On this basis, the diversion structure 317 is formed into at least two sound-emitting ports 31c11 in the sound-emitting portion 31c, so that the turbulent noise can be transmitted outward through at least two smaller sound-emitting ports 31c11, and the large eddy noise is separated into at least two small eddy noises through at least two sound-emitting ports 31c11, thereby reducing the energy of the turbulent noise. In this way, the auditory impact of the turbulent noise on the user can be reduced, thereby improving the user's experience.

[0084] Please refer to Fig.12 and Fig.13 The diversion structure 317 may include a diversion body 3171 , a diversion ring 3173 and a plurality of first diversion ribs 3175 .

[0085] The diverter body 3171 may be a cylindrical structure, which is connected to the inner wall surface of the assembly port and is hollow. The diverter ring 3173 is an annular structure and is located on the inner side of the diverter body 3171. A plurality of first diverter ribs 3175 are respectively connected to the diverter body 3171 and the diverter ring 3173, and are arranged at intervals along the circumference of the first diverter column; wherein the surfaces of two adjacent first diverter ribs 3175 facing each other, the inner wall surface of the diverter body 3171, and the outer wall of the diverter ring 3173 cooperate to define a sound outlet 31c11. With this arrangement, the assembly port can be divided into a plurality of sound outlets 31c11 by the diverter structure 317, for example Fig.12 The two first shunt ribs 3175 shown or Fig.13 The three first diverter ribs 3175 shown and the cross-sectional shape of the sound outlet 31c11 may be fan-shaped. With this arrangement, the large eddy noise can be separated into at least two small eddy noises, thereby reducing the energy of the turbulent noise.

[0086] Furthermore, the diverter ring 3173 may be hollow, and the inner wall of the diverter ring 3173 is surrounded by an inner sound-emitting port 31c13, which is connected to the front cavity 31a. In this way, the turbulent noise can be transmitted outward through at least two smaller sound-emitting ports 31c11, and can also be transmitted outward through the inner sound-emitting port 31c13, so that the turbulent noise can be further divided, so as to further reduce the auditory impact of the turbulent noise on the user, and improve the user's experience.

[0087] like Fig.14 As shown, the flow-dividing structure 317 includes a plurality of second flow-dividing ribs 3177 arranged at intervals along the width direction of the assembly port, and the second flow-dividing ribs 3177 extend along the length direction of the assembly port, wherein the surfaces of two adjacent second flow-dividing ribs 3177 facing each other cooperate to define a sound-emitting port 31c11. Specifically, the cross-sectional shape of the assembly port can be roughly rectangular, and the sound-emitting hole 31c1 can be divided into at least two sound-emitting ports 31c11 by the second flow-dividing ribs 3177 extending along the length direction of the assembly port, and the cross-sectional shape of the sound-emitting port 31c11 can be rectangular, so as to separate the large eddy current noise into at least two small eddy current noises, thereby achieving the effect of reducing the energy of the turbulent noise.

[0088] like Fig.15 As shown, the assembly port is in the shape of an elongated strip, and the diverter structure 317 includes a diverter body 3171 and a plurality of third diverter ribs 3179. The diverter body 3171 is connected to the inner wall surface of the assembly port and is hollow, and a plurality of third diverter ribs 3179 are connected to the inner side of the diverter body 3171 and are arranged at intervals along the length direction of the assembly port. Among them, the diverter body 3171 and the third diverter rib 3179 cooperate to define the sound-emitting port 31c11. Specifically, the cross-sectional shape of the assembly port can be roughly rectangular, and the assembly port can be divided into at least two sound-emitting ports 31c11 by the cooperation of the third diverter rib 3179 and the diverter body 3171. The cross-sectional shape of the sound-emitting port 31c11 can be roughly rectangular, so as to separate the large eddy current noise into at least two small eddy current noises, thereby achieving the effect of reducing the energy of the turbulent noise.

[0089] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0090] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An open-type headphone, characterized in that: The invention comprises a fixing structure and a sound-generating structure connected to the fixing structure, wherein the fixing structure is used to arrange the sound-generating structure in front of the ear of the user in a wearing state; wherein the sound-generating structure comprises: A sound-generating housing, comprising a sound-generating portion and a pressure-relieving portion; and A sound-generating unit is disposed in the sound-generating housing and divides the internal space of the sound-generating housing into a front cavity and a rear cavity, wherein the sound-generating portion is connected to the front cavity and the pressure-relieving portion is connected to the rear cavity; Wherein, in the wearing state, the pressure relief portion is closer to the ear canal opening of the ear than the sound-generating portion.

2. The open earphone according to claim 1, characterized in that In the wearing state, the sound-generating structure covers the ear canal opening of the ear and does not extend into the ear canal opening of the ear.

3. The open earphone according to claim 1, characterized in that The pressure relief portion is disposed close to the bottom of the sound-emitting shell, so that the pressure relief portion can face the front side of the intertragus notch of the ear in a wearing state.

4. The open earphone according to claim 1, characterized in that The sound-emitting housing comprises: A front shell, which forms the front cavity with the sound-emitting unit, and the sound-emitting part is arranged on the front shell; and The rear shell is connected to the front shell and at least forms the rear cavity with the sound-emitting unit. The pressure relief part is arranged on the rear shell.

5. The open earphone according to claim 4, characterized in that The rear housing comprises: A rear shell body connected to the front shell, the pressure relief portion is disposed on the rear shell body and has a pressure relief hole; and The rear cavity cover is arranged between the rear shell body and the sound-emitting unit, and together with the sound-emitting unit, forms the rear cavity and a pressure relief channel, wherein the pressure relief channel communicates the rear cavity and the pressure relief hole.

6. The open earphone according to claim 1, characterized in that The sound-generating housing is provided with a sound-conducting structure, the sound-conducting structure protrudes outward compared to other parts of the sound-generating housing, and the sound-conducting structure includes a first surface and a second surface surrounding the first surface, the first surface is arranged at an angle γ with the sagittal plane of the user in a wearing state, and the second surface is arranged at an angle with the first surface; Wherein, the sound-emitting portion is disposed on at least one of the first surface and the second surface, and 0<γ≤20°.

7. The open earphone according to claim 6, characterized in that The sound-emitting portion is provided with a plurality of sound-emitting holes, and the sound-emitting holes have a hole depth L and a hole diameter D, and satisfy the relationship: L / D>0.

35.

8. The open earphone according to claim 7, characterized in that In the wearing state, the first surface faces the inner wall of the concha cavity of the ear, the second surface faces the ear canal opening of the ear, and at least part of the sound-emitting part is arranged on the second surface.

9. The open earphone according to claim 8, characterized in that The second surface has a distance L1 from the antihelix of the ear in the wearing state, 0mm<L1≤15mm; When worn, the second surface has a distance L2 from the ear canal opening of the ear, and 1mm≤L2≤40mm.

10. The open earphone according to claim 8, characterized in that The normal direction of the first surface and the normal direction of the second surface are arranged at an angle β, wherein 0°≤β≤70°.

11. The open earphone according to claim 8, characterized in that The first surface is provided with a mounting port connected to the front cavity; the open earphone also includes a passive radiation membrane, the passive radiation membrane is connected to the sound-emitting shell and blocks the mounting port.

12. The open earphone according to claim 11, characterized in that The passive radiation film comprises: a membrane body connected to the sound-generating housing and sealing the mounting opening; and The counterweight block is arranged on a side of the membrane body facing the front cavity and is located in the middle of the membrane body.

13. The open earphone according to claim 1, characterized in that The open earphone further includes a shunt structure, which is arranged on the sound-emitting portion to form at least two sound-emitting ports.

14. The open earphone according to claim 13, characterized in that The diversion structure comprises: The flow dividing body is connected to the inner wall surface of the sound-generating part and is hollow; A diverter ring located inside the diverter body; and A plurality of first flow-dividing ribs, respectively connecting the flow-dividing body and the flow-dividing ring, and arranged at intervals along the circumference of the flow-dividing structure; The mutually facing surfaces of two adjacent first diverter ribs, the inner wall surface of the diverter body and the outer wall of the diverter ring cooperate to define the sound-generating opening.

15. The open earphone according to claim 14, characterized in that The diverter ring is hollow, and an inner wall surface of the diverter ring is provided with an inner sound-generating port, and the inner sound-generating port is connected to the front cavity.

16. The open earphone according to claim 13, characterized in that The diversion structure comprises a plurality of second diversion ribs arranged at intervals along the width direction of the sound-emitting portion, wherein the second diversion ribs extend along the length direction of the sound-emitting portion, wherein surfaces of two adjacent second diversion ribs facing each other cooperate to define the sound-emitting opening; Alternatively, the diversion structure includes a diversion body and a plurality of third diversion ribs, the diversion body is connected to the inner wall surface of the sound-emitting part and is hollow, the plurality of third diversion ribs are connected to the inner side of the diversion body and are arranged at intervals along the length direction of the sound-emitting part, wherein the diversion body and the third diversion ribs cooperate to define the sound-emitting port.

17. The open earphone according to claim 1, characterized in that An angle α is set between the opening direction of the pressure relief portion and the vertical axis of the user, satisfying the relationship: 0°≤α≤40°.

18. The open earphone according to claim 1, characterized in that The sound unit is provided with a diaphragm. In the thickness direction of the sound shell, there is a distance L3 between the center of the diaphragm and the sound-emitting part, and there is a distance L4 between the center of the diaphragm and the pressure relief part, satisfying the relationship L4≥1.05L3.

19. The open earphone according to claim 1, characterized in that: The fixed structure comprises: a hanging portion, connected to the sound-generating structure, and used to be hung between the upper side of the ear and the user's head in a wearing state; and The rear end portion is arranged at one end of the hanging portion away from the sound-generating structure, and is used to be attached between the rear side of the ear and the user's head when worn, and cooperate with the hanging portion to clamp the ear so that the sound-generating structure is located on the front side of the ear.

Images