Open-circuit type earphone

Abstract

To provide an open-circuit type earphone capable of more preferably suppressing sound leakage.SOLUTION: An open-circuit type earphone 100 contains: a fixing structure 10; and a sound emission structure 30 that is connected to the fixing structure 10. The fixing structure 10 is for providing the sound emission structure 30 to the front side of the ear of a user in a mounting state. The sound emission structure 30 contains: a sound emission housing; and a sound emission unit. In the sound emission housing, a sound emission part 31c and a pressure release part are provided. The sound emission unit is provided into the sound emission housing, separates the internal space of the sound emission housing into a front cavity and a rear cavity. The sound emission part 31c is provided as an open hole (a sound emission hole 31c1), and is communicated with the front cavity. The pressure release part is communicated with the rear cavity. The pressure release part is approached to an external acoustic meatus of an ear by the sound emission part 31c. In technical means of the present invention, sound leakage to the front side of the ear is effectively reduced, and a user experience can be improved.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present application relates to the technical field of earphones, and in particular to open-type earphones. [Background technology]

[0002] Currently, open-type earphone products are attached to the outside of the ear canal and do not block the ear canal, ensuring that consumers can hear the sound from the earphone and also hear external sounds, improving safety and comfort. However, since the open-type earphone is not sealed from the speaker to the ear canal opening, sound leakage from the earphone is serious. Summary of the Invention

[0003] The open-type earphone according to the embodiment of the present application can achieve the effect of better suppressing sound leakage.

[0004] An open-type earphone according to an embodiment of the present application includes a fixing structure and a sound-generating structure connected to the fixing structure, the fixing structure is for providing the sound-generating structure in front of a user's ear in a worn state, and the sound-generating structure is: a sound-producing housing provided with a sound-producing portion and a pressure relief portion; a sound-producing unit provided in the sound-producing housing and dividing an internal space of the sound-producing housing into a front cavity and a rear cavity, the sound-producing portion communicating with the front cavity and the pressure relief portion communicating with the rear cavity; When worn, the pressure relief portion is closer to the ear canal opening of the ear than the sound producing portion.

[0005] According to the open-type earphones of the embodiment of the present application, the sounds emitted from the sound generating unit and the pressure relief unit are given opposite phases, and opposite phase cancellation can be performed. In the embodiment of the present application, the pressure relief unit is closer to the ear canal opening than the sound generating unit, and by performing a certain degree of opposite phase cancellation of the sounds between the sound generating unit and the ear canal opening, sound leakage in front of the ear is effectively reduced, improving the user experience. [Brief description of the drawings]

[0006] In order to more clearly describe the technical means in the embodiments of the present application or the prior art, the drawings necessary for describing the embodiments or the prior art will be briefly described below. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the structures shown in these drawings without creative labor.

[0007] [Figure 1] 1 is a schematic diagram of an embodiment of an open-type earphone according to the present invention; [Diagram 2] FIG. 2 is a schematic diagram showing the open-type earphone in FIG. 1 when worn on an ear. [Diagram 3] 2 is a schematic cross-sectional view of the sound generation structure in FIG. 1. [Figure 4] 4 is a schematic cross-sectional view of the sound generation unit in FIG. 3. [Diagram 5] FIG. 3 is a schematic diagram of the ear in FIG. 2. [Figure 6] 2 is a schematic diagram of the open-type earphone in FIG. 1 as viewed from another angle when placed on the ear. [Figure 7] FIG. 1 is a schematic diagram of a human body reference. [Figure 8] FIG. 13 is a schematic cross-sectional view of another embodiment of the sound generating structure; [Figure 9] 2 is a schematic diagram of the open-type earphone shown in FIG. 1 as viewed from another angle. FIG. [Figure 10] 2 is a schematic diagram of a part of the sound generation structure in FIG. 1 as seen from another angle. FIG. [Figure 11] 2 is a schematic cross-sectional view of the sound generation structure in FIG. 1 as seen from still another angle. FIG. [Figure 12] 1 is a schematic cross-sectional view of an embodiment of a flow dividing structure according to the present invention; [Figure 13] FIG. 2 is a schematic diagram of another embodiment of the flow dividing structure of the present application. [Figure 14] FIG. 2 is a schematic diagram of another embodiment of the flow dividing structure of the present application. [Figure 15]FIG. 13 is a schematic diagram of yet another embodiment of the flow dividing structure of the present application.

[0008] The achievement of the objects, functional features and advantages of the present application will be further explained in combination with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In order to make the objectives, technical means and advantages of the present application clearer, the embodiments of the present application will be described in more detail below with reference to the drawings.

[0010] Where the following description refers to the drawings, unless otherwise stated, the same numerals in different drawings refer to the same or similar elements. The embodiments described in the following illustrative examples do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0011] In the present description, the terms "first", "second", etc. are merely for explanatory purposes and should not be understood as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in the present description according to the specific situation. In addition, in the present description, unless otherwise stated, "plurality" means two or more. "And / or" describes the related relationship of related objects and indicates that there may be three types of relationships, for example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of this application. The terms used herein are only for describing specific examples and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0013] Currently, open-type earphone products are attached to the outside of the ear canal, and the earphone does not block the ear canal, so that consumers can hear the sound of the earphone and also hear external sounds, improving safety and comfort. Since the open-type earphone is not sealed from the speaker to the ear canal opening, sound leakage from the earphone is serious.

[0014] To solve the above problems, the present application provides an open-type earphone 100, which may be an air conduction earphone. The air conduction earphone has a built-in sound-generating unit, and the acoustic cavity is formed with pores that conduct sound directionally.

[0015] As can be seen, the open-type earphone 100 should at least be set to a wearing state, which is a state in which the open-type earphone 100 can be adjusted to the user's ear and fixed relatively to the ear, and in this state, the user can obtain a preferred listening effect.

[0016] As shown in FIG. 1, the open-type air conduction earphone 100 according to an embodiment of the present application can have higher quality sound than a bone conduction earphone, and also has less sound leakage because the sound is conducted directionally.

[0017] As shown in Fig. 1 and Fig. 2, the open-type earphone 100 includes a fixing structure 10 and a sound-generating structure 30 connected to the fixing structure 10. The fixing structure 10 includes a hanging part 13 and a rear end part 11, the hanging part 13 is connected to the sound-generating structure 30 and is hung between the upper side of the ear 200 and the user's head in a worn state, and the rear end part 11 is provided at one end of the hanging part 13 away from the sound-generating structure 30 and is attached between the rear side of the ear 200 and the user's head in a worn state. The hanging part 13 is curved in an arc shape and forms a hook shape, and the hanging part 13 and the rear end part 11 contact at least the front and rear sides of the ear 200 to realize fixation with the ear 200, so that the sound-generating structure 30 connected to one end of the hanging part 13 can be stably provided on the front side of the ear 200. As can be understood, the hanging part 13 and the rear end 11 have a certain elasticity, so that the user can pull the hanging part 13 and / or the rear end 11 to fit the fixing structure 10 to the ear 200. When the open-type earphone 100 is worn on the ear 200, the sound-producing structure 30 covers the ear canal opening 200a of the ear 200 and does not insert into the ear canal opening 200a of the ear 200.

[0018] Preferably, the fixed structure 10 includes a fixed housing, and the sound-producing structure 30 includes a sound-producing housing 31, and the fixed housing and the sound-producing housing 31 may be two parts that are removably connected, and may be processed and molded simultaneously during processing.

[0019] As shown in FIG. 3, the sound-producing structure 30 emits sound and transmits the sound to the ear canal 200a of the ear 200 through air. The sound-producing structure 30 further includes a sound-producing unit 33 provided in the sound-producing housing. To facilitate manufacturing and assembly, the sound-producing housing 31 usually includes a front housing 311 and a rear housing 313, and when the front housing 311 and the rear housing 313 are butted together, they surround each other to form a mounting space. The sound-producing unit 33 is provided in the mounting space, and the sound-producing unit 33 forms a front cavity 31a together with the front housing 311, and forms a rear cavity 31b together with the rear housing 313 or the rear housing 313 and a part of the front housing 311. The front housing 311 is provided with a sound-producing portion 31c communicating with the front cavity 31a. The rear housing 313 is provided with a pressure relief portion 31d communicating with the rear cavity 31b. The sound generating portion 31c may be provided as an opening or a hole (sound generating hole 31c1), and the pressure relief portion 31d may be provided as an opening or a hole (pressure relief hole 31d1), and is not particularly limited. The sound generating unit 33 is provided with a vibration membrane 331, and air vibrates when the vibration membrane 331 is vibrated, so that the air can transmit sound via the sound generating portion 31c.

[0020] As can be seen, the open-type earphone 100 further includes a main control board 35 and a battery. The main control board 35 is connected to the rear housing 313 and electrically connected to the sound generating unit 33 to control the vibration of the diaphragm 331 of the sound generating unit 33 to generate sound. The battery is also electrically connected to the main control board 35 to supply power to the sound generating unit 33. The battery generally has a large mass, and in the embodiment of the present application, the battery is provided at the rear end 11 and can cooperate with the sound generating structure 30 to make the weight distribution of the open-type earphone 100 more uniform, so that in the wearing state, the sound generating structure 30 and the battery are provided on both the front and rear sides of the ear 200, making the wearing more comfortable and secure.

[0021] 4, the sound generating unit 33 includes a frame 337, a magnetic circuit system 335, a vibration system, and a hanging member 339. The frame 337 is provided with an accommodation cavity 337a and an opening communicating with the accommodation cavity 337a, and the magnetic circuit system 335 is provided in the accommodation cavity 337a and connected to the frame 337. The vibration system includes a vibrating membrane 331 and a voice coil assembly 333, the vibrating membrane 331 covers the opening and is connected to the frame 337, and the voice coil assembly 333 is located in the accommodation cavity 337a and connected to the vibrating membrane 331. Specifically, in one embodiment, the magnetic circuit system 335 includes a first magnetic body 3351 and a second magnetic body 3353, the second magnetic body 3353 is provided surrounding the first magnetic body 3351, and a magnetic gap 335a is provided between the first magnetic body 3351 and the second magnetic body 3353, and the voice coil assembly 32 is inserted into the magnetic gap 335a. The hanging member 339 is located in the receiving cavity 337a, and is provided along a direction intersecting with the axial direction AA of the voice coil assembly 333, and is connected to the frame 337 and the voice coil assembly 333.

[0022] Specifically, taking the opening as an example located above the receiving cavity 337a, the voice coil assembly 333 is located in the receiving cavity 337a, and the vibrating membrane 331 covers the opening of the receiving cavity 337a, the voice coil assembly 333 is connected to the vibrating membrane 331, the vibrating membrane 331 has a vertical acting force on the voice coil assembly 333, and the suspension member 339 has an oblique acting force on the voice coil assembly 333, in this case, the voice coil assembly 333 has two acting forces in different directions. In the embodiment of the present application, the crossing angle between the direction of providing the suspension member 339 and the axial direction AA of the voice coil assembly 333 is not limited, and preferably, the suspension member 339 is provided perpendicular to the axial direction of the voice coil assembly 333, i.e., the direction of providing the suspension member 339 is perpendicular to the axial direction AA of the voice coil assembly 333. By providing the suspending member 339, the suspending member 339 and the diaphragm 331 simultaneously generate an acting force on the voice coil assembly 333, and increase the stress points of the voice coil assembly 333, thereby reducing the polarization of the voice coil and reducing the catching of the voice coil assembly 333 with the magnetic circuit system 335 and the 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 may also be set smaller, and thus the voice coil assembly 333 is closer to the magnetic field line dense region of the magnetic circuit system 335, and the Lorentz force that the voice coil assembly 333 receives when it is energized is larger, so that the driving efficiency of the sound generating unit 33 is higher, the amplitude of vibration of the diaphragm 331 is larger, and the output sound is louder.

[0023] For example, the diaphragm 331 has an amplitude of 0.5 mm or more and less than 2.0 mm. The diaphragm 331 pushes the air with an amplitude of 0.5 mm or more, thereby realizing a large low-frequency sound pressure level, a dive-down depth, and a shocking and subjective hearing sensation in low-frequency sounds, and thus solving to some extent the problem of serious low-frequency loss due to low-frequency sounds being diffused to the outside when the open-type earphone 100 is in a high-frequency sound leakage state.

[0024] By vibrating the diaphragm 331, it is possible to generate vibrations of opposite phases in the air in the front cavity 31a and the rear cavity 31b, so that the sounds emitted from the sound generating section 31c and the pressure relief section 31d are in opposite phases and can be offset to a certain extent to reduce sound leakage. This type of offset has a strong near-end offset effect and a weak far-end offset effect, and is suitable for a design that reduces sound leakage.

[0025] As shown in Fig. 3, Fig. 5 and Fig. 6, in the embodiment of the present application, the sound generating unit 31c faces the ear 200, and in order to ensure the hearing effect, in the wearing state, the sound generating unit 31c is located in the concha cavity 200b of the ear 200, but is not inserted into the ear canal opening 200a of the ear 200, and is provided at a distance from the ear canal opening 200a of the ear 200, so that the space of this part close to the ear canal opening 200a of the ear 200 is fully utilized, a space for scattering and reverberation is formed, and a better hearing effect is obtained. In the embodiment of the present application, when the user wears the open type earphone 100, the pressure relief unit 31d is closer to the ear canal opening 200a of the ear 200 than the sound generating unit 31c. In the wearing state, the sound generating housing 31 has a certain distance from the ear canal opening 200a of the ear 200, thereby realizing the prevention of external sound from entering the ear canal opening 200a of the ear 200. Apparently, sound leakage is also likely to occur between the sound producing structure 30 and the ear canal opening 200a of the ear 200. In the embodiment of the present application, the pressure relief section 31d is closer to the ear canal opening 200a of the ear 200 than the sound producing section 31c, and a certain degree of antiphase cancellation of sound is performed between the sound producing section 31c and the ear canal opening 200a of the ear 200, thereby effectively reducing sound leakage in front of the ear 200 and near the ear canal opening 200a of the ear 200, and improving the user experience.

[0026] As shown in FIG. 7, as is well known, in the fields of medicine, anatomy, and the like, three basic cutting 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 is a cutting plane perpendicular to the ground along the front-rear direction of the body, dividing the human body into two parts, the left and right, the coronal plane is a cutting plane perpendicular to the ground along the left-right direction of the body, dividing the human body into two parts, the front and the back, and the horizontal plane is a cutting plane parallel to the ground along the up-down direction of the body, dividing the human body into two parts, the top and the bottom. Accordingly, the sagittal axis refers to an axis that passes vertically through the coronal plane along the front-rear direction of the body, the coronal axis refers to an axis that passes vertically through the sagittal plane along the left-right direction of the body, and the vertical axis refers to an axis that passes vertically through the horizontal plane along the up-down direction of the body.

[0027] 6 and 7, in one embodiment of the present application, in the worn state, the opening direction of the pressure relief portion 31d and the user's vertical axis form an included angle α, which satisfies the relationship of 0°≦α≦40°. In this way, it is possible to prevent the pressure relief hole 31d1 from directly facing the front, to prevent the user or others from hearing the sound emitted from the pressure relief hole 31d1, and to further reduce sound leakage in front of the ear 200.

[0028] For example, the pressure relief hole 31d1 may be provided substantially toward the front opening of the tragus 202 of the ear 200 when the earphone is worn.

[0029] Also, for example, the pressure relief portion 31d is provided close to the bottom of the rear housing 313 so that the pressure relief hole 31d1 faces the front side of the intertragal notch 204 of the ear 200 when the device is worn. The tragus 202, the intertragal notch 204, and the antitragal 203 of the ear 200 are usually surrounded to form a notch-like structure, and the notch is located near the external auditory meatus opening 200a of the ear 200 and communicates with the concha cavity 200b of the ear 200. Therefore, a significant part of the sound near the external auditory meatus opening 200a of the ear 200 is likely to leak from the notch, and according to the embodiment of the present application, the pressure relief portion 31d faces the front side of the intertragal notch 204 of the ear 200 when the device is worn, thereby canceling the sound at that location in antiphase, and thus sound leakage from the front side of the ear 200 can be reduced overall.

[0030] Naturally, when worn, the pressure relief hole 31d1 may be provided approximately toward the front side of the supratragic notch of the ear 200 or the upper position of the ear 200, and the present application is not limited thereto.

[0031] Furthermore, the pressure relief portion 31d extends along the circumferential direction of the rear housing 313. For example, the pressure relief portion 31d is substantially elliptical, and the pressure relief portion 31d may be provided with one pressure relief hole 31d1 or may be provided with multiple pressure relief holes 31d1, 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 achieve a comprehensive sound leakage prevention effect by covering a large edge range.

[0032] As shown in Fig. 8, in one embodiment of the present application, the rear housing 313 includes a rear housing main body 3131 and a rear cavity cover 3133. The rear housing main body 3131 is connected to the front housing 311, and the pressure relief portion 31d is provided on the rear housing main body 3131. The rear housing main body 3131 is formed in a cover shape, and the outer contour thereof may be circular or rectangular, which is not limited in the embodiment of the present application. The periphery of the rear housing main body 3131 is connected to the periphery of the front housing 311, and the rear cavity cover 3133 is provided on the side of the rear housing main body 3131 facing the sound generating unit 33, thereby dividing the space between the rear housing main body 3131 and the sound generating unit 33 into the rear cavity 31b and the mounting space. The mounting space is surrounded by the rear cavity cover 3133 and the rear housing main body 3131 or the rear housing main body 3131 and a part of the front housing 311, and the mounting space accommodates 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 forms the rear cavity 31b, and also forms a pressure relief passage 31e that communicates with the rear cavity 31b and the pressure relief hole 31d1.

[0033] Illustratively, the rear cavity cover 3133 includes a bottom plate and a surrounding plate provided on the circumferential side of the bottom plate, the bottom plate being provided between the sound generating unit 33 and the rear housing main body 3131, and the surrounding plate being extended from the bottom plate toward the front housing 311. The front housing 311 is provided with a position limiting step provided along its own circumferential direction, and the surrounding plate is engaged with and connected to the position limiting step. In this embodiment, both the bottom plate and the surrounding plate are provided at intervals from the sound generating unit 33 and surround it to form the rear cavity 31b.

[0034] As a possible structure, the pressure relief portion 31d is provided on one side of the rear housing main body 3131, and the rear housing main body 3131 is further provided with a baffle facing the pressure relief portion 31d. The baffle and the pressure relief portion 31d are provided at a distance from each other to form a passage along the extension direction of the baffle toward the front housing 311, and the passage communicates with the pressure relief hole 31d1. A communication port is provided at the boundary between the bottom plate and the surrounding plate in a portion of the rear cavity cover 3133 close to the baffle. As can be understood, the communication port may be provided in the bottom plate, or may be formed by being surrounded by the bottom plate and the surrounding plate. Another passage is formed in the rear cavity cover 3133 along the extension direction of the surrounding plate, and the passage is provided corresponding to and communicates with the communication port, and also communicates with the rear cavity 31b. As a result, the two passages communicate with each other via the communication port, and are combined to form a pressure relief passage 31e that is provided on the periphery of the sound producing unit 33 and extends along the thickness direction of the sound producing structure 30.

[0035] Due to the design of the pressure relief passage 31e, the air load in the rear cavity 31b will not immediately leak out to the outside of the sound-producing housing 31 through the pressure relief hole 31d1, and when the sound-producing unit 33 operates, each vibration of the vibrating membrane 331 will promote as much air vibration in the cavity of the rear cavity 31b as possible, increasing the volume of the air and increasing the mass of the air.

[0036]

number

[0037] Of course, in the embodiment of the present application, the structure of the pressure relief passage 31e is not limited, for example, the two end passages forming the pressure relief passage 31e may be arranged on the same axis or different axes, and when arranged on different axes, the complexity of the pressure relief passage 31e can be appropriately increased, and the low frequency performance can be further improved. The extension direction of the pressure relief passage 31e and the axis of the pressure relief part 31d may be arranged in approximately the same direction or at a certain angle, and when they are arranged at a certain angle, the end effect of the pipe can make the pressure relief passage 31e longer to some extent, thereby increasing the volume of the resonant air in the rear cavity 31b and improving the low frequency performance.

[0038] 8, in order to further improve the low-frequency performance of the open-type earphone 100, in the thickness direction of the sound-producing housing 31, the distance between the center of the diaphragm 331 and the sound-producing portion 31c is L3, and the distance between the center of the diaphragm 331 and the pressure-relief portion 31d is L4, which satisfies the relationship L4≧1.05L3. That is, the distance from the center of the diaphragm 331 to the pressure-relief portion 31d is longer than the distance to the sound-producing portion 31c, and the path of air from the vicinity of the diaphragm 331 to the pressure-relief portion 31d is longer, that is, the volume of the gas in the rear cavity 31b due to the vibration of the diaphragm 331 is larger and the weight is larger, so that the vibration mass Mm is increased and the resonant frequency f0 is further reduced, thereby improving the low-frequency acoustic effect of the earphone.

[0039] Preferably, the rear housing main body 3131 may be provided with one pressure relief hole 31d1, and the rear housing main body 3131, the rear cavity cover 3133 and the sound-producing unit 33 form at least two pressure relief passages 31e, and the at least two pressure relief passages 31e are connected to one pressure relief hole 31d1, thereby ensuring the low-frequency performance of the earphone and allowing the air in the rear cavity 31b to be quickly discharged to the outside of the sound-producing housing 31 through the at least two pressure relief passages 31e.

[0040] In order to prevent foreign matter from entering the pressure relief passage 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 decorated metal sheet, and a braided mesh.

[0041] Alternatively, the rear housing main body 3131 is provided with at least two pressure relief holes 31d1 forming a porous structure, and the rear cavity cover 3133 and the sound generating unit 33 form at least two pressure relief passages 31e. The pressure relief hole 31d1 communicates with at least one pressure relief passage 31e. That is, the at least two pressure relief holes 31d1 may communicate with at least two pressure relief passages 31e in one-to-one correspondence, and one pressure relief hole 31d1 may correspond to at least two pressure relief passages 31e. In this way, when a porous network structure is not used, the low-frequency performance of the earphone and the smooth exhaust of the pressure relief hole 31d1 are ensured, which is advantageous for reducing material costs.

[0042] As shown in Fig. 8 to Fig. 10, in the embodiment of the present application, the sound-producing housing 31 is provided with a sound-guiding structure 311a, which includes a first surface 311b and a second surface 311c surrounding the first surface 311b. Specifically, as shown in Fig. 10, the sound-producing housing 31 has a thickness direction CC and defines a reference plane perpendicular to the thickness direction CC, the first surface 311b and the reference plane are provided at an included angle γ, and the second surface 311c and the first surface 311b are provided at an included angle. In one embodiment, in the worn state, the above-mentioned reference plane is exactly parallel to the sagittal plane of the human body, i.e., in this embodiment, the first surface 311b and the sagittal plane are also provided at an included angle γ.

[0043] In this way, the thickness of the sound guide structure 311a gradually increases along the vertical direction of the drawing shown in FIG. 9, and the sound guide structure 311a protrudes outward from other parts of the sound guide housing 31 toward the ear 200. In the worn state, the sound guide structure 311a can be inserted into the concha 200b of the ear 200 from other parts of the sound guide housing 31, and the sound guide portion 31c may be provided on the sound guide structure 311a, specifically, on at least one of the first surface 311b and the second surface 311c. That is, the sound guide portion 31c may be provided only on the first surface 311b or the second surface 311c, or may be provided on both the first surface 311b and the second surface 311c. Providing the sound guide portion 31c on the sound guide structure 311a is advantageous in improving the hearing effect by making the space of the concha 200b of the ear 200 a reverberation space.

[0044] 0°<γ≦20°, and specifically, the included angle γ may be set to 5 degrees, 10 degrees, 15 degrees, 20 degrees, etc., and is not limited thereto in the present application. By limiting the angle γ to be greater than 0 degrees and equal to or less than 20 degrees, the sound-guiding structure 311a has a certain degree of protrusion and does not excessively occupy the space near the ear canal opening 200a of the ear 200, which is advantageous in reducing the thickness of the sound-producing housing 31 and improving product competitiveness.

[0045] In some embodiments, at least a part of the sound generating part 31c is provided on the first surface 311b, and the first surface 311b is provided toward the ear canal opening 200a of the ear 200. In the wearing state, due to the inclined first surface 311b, the sound generating part 31c is further toward the ear canal opening 200a of the ear 200, and the sound emitted from the sound hole 31c1 can be transmitted more directly and completely to the ear canal opening 200a of the ear 200 by improving the directivity of the sound, thereby effectively improving the sound pressure level of the sound received by the human ear, and the sound becomes clearer. As can be understood, when γ is 0° or γ>20°, the sound generating part 31c is greatly deviated from the ear canal opening 200a of the ear 200, so that the hearing effect is reduced.

[0046] 9 and 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 may extend in an arc shape or be annular for aesthetic purposes. The sound-producing part 31c is provided on the second surface 311c, and in the worn state, the second surface 311c covers the ear canal opening 200a of the ear 200, so that the sound emitted from the sound-producing part 31c can enter the ear canal opening 200a of the ear 200.

[0047] 8 again, in one embodiment, in order to improve the low-frequency performance of the earphone, the sound-generating housing 31 includes a housing body and a passive radiation film 315. Specifically, the housing body is formed with the above-mentioned sound-guiding structure 311a, and is provided with the above-mentioned first surface 311b and second surface 311c, and the first surface 311b is provided with a mounting hole 31f communicating with the front cavity 31a, preferably, the mounting hole 31f is a circular opening, and the passive radiation film 315 is connected to the housing body and can close the mounting hole 31f.

[0048] The passive radiation membrane 315 is connected to the sound-producing housing 31 on the periphery of the mounting opening 31f via an adhesive or a fixing member, and the passive radiation membrane 315, the housing body, and the sound-producing unit 33 form the front cavity 31a. When the vibration membrane 331 of the sound-producing unit 33 vibrates to vibrate the air in the front cavity 31a, the passive radiation membrane 315 can vibrate together with the vibration membrane 331.

[0049]

number

[0050] Further, in one embodiment, the passive radiation membrane 315 includes a membrane body 3151 and a weight block 3153. The membrane body 3151 fits the shape of the mounting hole 31f and is slightly larger than the mounting hole 31f, is tightly connected to the housing body on the periphery of the mounting hole 31f, and closes the mounting hole 31f. The weight block 3153 is provided on the side of the membrane body 3151 facing the front cavity 31a, and the weight block 3153 is located in the center of the membrane body 3151 to ensure the consistency of vibration. In the embodiment of the present application, the weight block 3153 is provided on one side of the passive radiation membrane 315 to further increase the vibration mass Mm and further reduce the resonance frequency f0. Illustratively, the resonance frequency of the passive radiation membrane 315 is 100Hz or less, thereby improving low-frequency sound and hearing sensation.

[0051] In one embodiment, the normal direction of the first surface 311b and the normal direction of the second surface 311c are arranged at an included angle β, where 0°≦β≦70°. As can be understood, when β is 0°, the first surface 311b and the second surface 311c are substantially flush and are both arranged toward the concha 200b of the ear 200. When 0°<β≦70°, that is, when the first surface 311b and the second surface 311c are arranged at an angle and the space of the ear 200 is limited, the first surface 311b is arranged toward the inner wall of the concha 200b of the ear 200, the second surface 311c inclined with respect to the first surface 311b can be arranged toward the ear canal opening 200a of the ear 200, and a sufficient volume of the front cavity 31a can be secured without interference, improving the sound performance. If β>70°, an excessively large included angle may affect the space of the front cavity 31a. Therefore, in the embodiment of the present application, the included 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 advantageous in improving sound performance.

[0052] Furthermore, in the worn state, the distance between the second surface 311c and the antihelix 201 of the ear 200 is L1, and 0 mm < L1 ≤ 15 mm. As can be understood, in this way, since the second surface 311c does not contact the antihelix 201, the sound emission hole 31c1 is not blocked, and a part of the space of the external auditory meatus 200a of the ear 200 can be fully utilized to generate sound scattering and reverberation, which is advantageous for obtaining a better sound listening effect.

[0053] Also, in the worn state, the distance between the second surface 311c and the external auditory meatus 200a of the ear 200 is L2, and 1 mm ≤ L2 ≤ 40 mm. As can be understood, when L2 is less than 1 mm, it affects the user's recognition of external sounds, and when L2 is greater than 50 mm, the distance from the sound outlet to the external auditory meatus 200a of the ear 200 is too far, and there is a possibility that the user cannot fully hear the sound from the sound outlet. Therefore, in the embodiments of the present application, by being limited to 1 mm ≤ L2 ≤ 40 mm, not only can it be ensured that the earphone is in an open state and the user can hear external sounds, but also the open-type earphone 100 can be provided with excellent acoustic effects.

[0054] Furthermore, as shown in FIG. 9, in the embodiments of the present application, the sound emission part 31c is provided in a fan shape, and the center of the circle corresponding to the fan shape is located at the central part of the front housing 311. The sound emission part 31c is distributed close to the edge of the sound guiding structure 311a, and in the worn state, by well covering the external auditory meatus 200a of the ear 200, the sound listening effect of the open-type earphone 100 can be further improved.

[0055] Preferably, the sound emission part 31c is provided with one sound emission hole 31c1 having a fan-shaped opening. In order to prevent foreign objects from entering the front cavity 31a through the sound emission hole 31c1, the sound emission part 31c is covered with a porous network structure, and the porous network structure includes, but is not limited to, a metal mesh, a porous etched decorative metal sheet, and a braided mesh.

[0056] 9, in another possible embodiment of the present application, the sound-producing portion 31c includes a plurality of sound-producing holes 31c1 that form a porous structure and communicate with the front cavity 31a. The plurality of sound-producing holes 31c1 are uniformly located on the second surface 311c and are arranged along the extension direction of the sound-producing portion 31c.

[0057] As shown in FIG. 11, due to scattering and diffraction of sound waves, the sound waves emitted from each sound hole 31c1 are dispersed on the fan surface, and the sound wave fan surfaces of the multiple sound holes 31c1 overlap, and when the earphone is close to the ear canal, the overlapped sound waves are all emitted from the sound holes 31c1 and have the same phase, and the sound can be enhanced in the overlapping area, making the sound heard by the user clearer.

[0058] 3 again, preferably, the sound hole 31c1 has a hole depth L and a hole diameter D, and satisfies the relationship L / D>0.35. As can be seen, when the length to diameter ratio L / D is less than 0.35, the scattering angle of the sound waves is large, and in the embodiment of the present application, it is limited to L / D>0.35, a small sound scattering angle is obtained, the sound wave directivity is better, and the user's hearing effect can be improved.

[0059] In order to further improve the user experience, as shown in Figures 12 to 15, the open-type earphone 100 is further provided with a diversion structure 317, which is provided in the sound-producing part 31c and cooperates with the sound-producing housing 31 to form at least two sound-producing openings 31c11 so that sound waves propagate to the outside of the sound-producing housing 31 through at least two sound-producing openings 31c11.

[0060] As can be understood, the sound-producing portion 31c is provided with an assembly port communicating with the front cavity 31a. The flow-diverting structure 317 can be integrally molded in the assembly port and divide the assembly port into at least two sound-producing ports 31c11. In some other structural forms, the flow-diverting structure 317 may be a structure independent of the sound-producing housing 31, including a cover body structure and an assembly body. The cover body structure is provided on the side of the sound-producing housing 31 facing the ear 200 and covers at least the sound-producing portion 31c. The assembly body protrudes into the sound-producing housing 31 relative to the cover body structure and is inserted into the assembly port. The assembly body itself may be provided with the sound-producing port 31c11, or the sound-producing port 31c11 may be formed by the assembly body and the inner wall structure of the assembly port, so that the sound-producing port 31c11 can communicate with the front cavity 31a, and the embodiment of the present application is not limited thereto.

[0061] In the actual use process, the vibration membrane 331 has a large amplitude and the air flow speed is too fast during the operation process, so that turbulence is easily generated, and the sound propagating to the outside through the sound generating unit 31c has turbulent noise, which affects the user's hearing experience. Based on this, the dividing structure 317 forms at least two sound generating openings 31c11 in the sound generating unit 31c, so that the turbulent noise can be propagated to the outside through at least two sound generating openings 31c11 of small size, and the energy of the turbulent noise can be reduced by dividing the large vortex noise into at least two small vortex noises by the at least two sound generating openings 31c11, thus reducing the impact of the turbulent noise on the user's hearing and improving the user's usage experience.

[0062] As shown in FIGS. 12 and 13, the flow diverter structure 317 may include a flow diverter body 3171, a flow diverter ring 3173 and a plurality of first flow diverter ribs 3175.

[0063] The diverter body 3171 may be a cylindrical structure, connected to the inner wall surface of the assembly port, and provided in a hollow shape. The diverter ring 3173 is a ring-shaped structure and located inside 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 circumferential direction of the first diverter column, and the mutually facing surfaces of two adjacent first diverter ribs 3175, the inner wall surface of the diverter body 3171, and the outer wall of the diverter ring 3173 jointly define the sound outlet 31c11. When provided in this way, the assembly port may be partitioned into a plurality of sound outlets 31c11 by the diverter structure 317, such as the two first diverter ribs 3175 shown in FIG. 12 or the three first diverter ribs 3175 shown in FIG. 13, and the final cross-sectional shape of the sound outlet 31c11 may be a sector shape. With this arrangement, the energy of the turbulent noise can be reduced by partitioning the large eddy noise into at least two smaller eddy noises.

[0064] Furthermore, the flow dividing ring 3173 may be hollow, and the inner wall surface of the flow dividing ring 3173 is provided with an inner sound opening 31c13, which communicates with the front cavity 31a. In this way, the turbulent noise can be propagated to the outside not only through at least two small sound openings 31c11 but also through the inner sound opening 31c13, which realizes further isolation of the turbulent noise, further reducing the impact of the turbulent noise on the user's hearing, and improving the user's usage experience.

[0065] 14, the diversion structure 317 includes a plurality of second diversion ribs 3177 spaced apart along the width direction of the assembly port, the second diversion ribs 3177 extend along the length direction of the assembly port, and the opposing surfaces of two adjacent second diversion ribs 3177 jointly define the sound port 31c11. Specifically, the cross-sectional shape of the assembly port may be approximately rectangular, and the sound hole 31c1 can be partitioned into at least two sound ports 31c11 by the second diversion ribs 3177 extending along the length direction of the assembly port, and the final cross-sectional shape of the sound port 31c11 may be rectangular, which realizes partitioning of a large vortex noise into at least two small vortex noises and achieves the effect of reducing the energy of turbulent noise.

[0066] As shown in FIG. 15, the assembly port is a long strip, and the diverting structure 317 includes a diverting body 3171 and a plurality of third diverting ribs 3179. The diverting body 3171 is connected to the inner wall surface of the assembly port and is hollow, and the plurality of third diverting ribs 3179 are connected to the inside of the diverting body 3171 and are arranged at intervals along the length direction of the assembly port. The diverting body 3171 and the third diverting rib 3179 jointly define the sound outlet 31c11. Specifically, the cross-sectional shape of the assembly port may be approximately rectangular, and the third diverting rib 3179 and the diverting body 3171 jointly divide the assembly port into at least two sound outlets 31c11, and the final cross-sectional shape of the sound outlet 31c11 may be approximately rectangular, which realizes dividing a large vortex noise into at least two small vortex noises and achieves the effect of reducing the energy of turbulent noise.

[0067] The same or similar symbols in the drawings of this embodiment correspond to the same or similar components, and in the description of this application, the orientations or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate and simplify the description of this application, and do not indicate or imply that the devices or elements shown have a specific orientation, or must be configured and operated in a specific orientation. Therefore, the terms used to describe the positional relationships in the drawings are merely illustrative and do not limit the application, and a person skilled in the art can understand the specific meaning of the above terms according to the specific situation.

[0068] The above are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included within the protection scope of the present application. [Explanation of symbols]

[0069] 100 Open type earphones 10 Fixed structure 11 Rear end 13 Hanging section 30 Pronunciation Structure 31 Pronunciation Housing 31a Front Cavity 31b Rear cavity 31c Pronunciation section 31c1 Sound hole 31c11 Pronunciation hole 31c13 Internal sound hole 31d Pressure relief section 31d1 Pressure relief hole 31e Pressure relief passage 31f Mounting port 311 Front housing 311a Sound guiding structure 311b 1st surface 311c 2nd surface 313 Rear housing 3131 Rear housing body 3133 Rear Cavity Cover 315 Passive Radiation Membrane 3151 Membrane body 3153 Weight Block 317 Diversion structure 3171 Diversion body 3171 Diversion body 3173 Diverter Ring 3175 First Diverting Rib 3177 Second Diverting Rib 3179 3rd Diverting Rib 33 Sound Unit 331 Vibrating Membrane 333 Voice Coil Assembly 335 Magnetic Circuit System 335a Magnetic Gap 3351 First magnetic body 3353 Second magnetic material 337 Frames 337a Containment Cavity 339 Suspension members 35 Main control board 200 ears 200a External auditory canal opening 200b Concha cavity 201 Antihelix 202 Tragus 203 Antitragus 204 Intertragal notch

Claims

1. The earphone includes a fixed structure and a sound-generating structure connected to the fixed structure, the fixed structure being for providing the sound-generating structure in front of a user's ear in a worn state, and the sound-generating structure includes: a sound-producing housing provided with a sound-producing portion and a pressure relief portion; a sound-producing unit provided in the sound-producing housing and dividing an internal space of the sound-producing housing into a front cavity and a rear cavity, the sound-producing portion communicating with the front cavity and the pressure relief portion communicating with the rear cavity; An open-type earphone, characterized in that, when worn, the pressure relief portion is closer to the ear canal opening of the ear than the sound producing portion.

2. 2. The open-type earphone according to claim 1, wherein, in a worn state, the sound-generating structure covers an ear canal opening of the ear, but is not inserted into the ear canal opening of the ear.

3. The open-type earphone according to claim 1, characterized in that the pressure relief portion is provided close to the bottom of the sound-producing housing so that it can face the front side of the intertragal notch of the ear when worn.

4. The sound-producing housing includes: a front housing in which the sound generating unit and the sound generating portion are provided and which defines the front cavity together with the sound generating unit; The open-type earphone according to claim 1, further comprising: a rear housing connected to the front housing, forming the rear cavity together with at least the sound generating unit, and in which the pressure relief portion is provided.

5. The rear housing includes: a rear housing body connected to the front housing, the pressure relief portion being provided therein, and having a pressure relief hole; 5. The open-type earphone according to claim 4, further comprising: a rear cavity cover provided between the rear housing body and the sound-producing unit, the rear cavity being formed together with the sound-producing unit into a pressure relief passage that connects the rear cavity to the pressure relief hole.

6. The sound-producing housing is provided with a sound-guiding structure, the sound-guiding structure protruding outward from other parts of the sound-producing housing and including a first surface and a second surface surrounding the first surface, the first surface being provided at an included angle γ with a sagittal plane of a user in a worn state, and the second surface being provided at an included angle with the first surface, The open-type earphone according to claim 1, wherein the sound-producing portion is provided on at least one of the first surface and the second surface, and 0<γ≦20°.

7. 7. The open-type earphone according to claim 6, wherein the sound generating section is provided with a plurality of sound generating holes, each of which has a hole depth L and a hole diameter D, and which satisfies the relationship L / D>0.

35.

8. The open-type earphone according to claim 7, characterized in that, in a worn state, the first surface faces an inner wall of the concha cavity of the ear, the second surface faces an ear canal opening of the ear, and at least a portion of the sound-producing portion is provided on the second surface.

9. In a worn state, the distance between the second surface and the antihelix of the ear is L1, and 0 mm<L1≦15 mm; 9. The open-type earphone according to claim 8, wherein, in a worn state, a distance L2 between the second surface and an ear canal opening of the ear is 1 mm≦L2≦40 mm.

10. The open-type earphone according to claim 8, wherein the normal direction of the first surface and the normal direction of the second surface are set to form an included angle β (0°≦β≦70°).

11. The open-type earphone according to claim 8, characterized in that the first surface is provided with an attachment hole communicating with the front cavity, and the open-type earphone further includes a passive radiation membrane connected to the sound-generating housing and closing the attachment hole.

12. The passive emission membrane comprises: a membrane body connected to the sound-generating housing and closing the mounting opening; The open-type earphone according to claim 11, further comprising: a weight block provided on a side of the membrane body facing the front cavity and located in a central portion of the membrane body.

13. The open-type earphone according to claim 1 , further comprising a diversion structure provided in the sound generating section to form at least two sound generating openings.

14. The flow dividing structure includes: A hollow flow dividing body connected to an inner wall surface of the sound generating portion; a flow divider ring located inside the flow divider body; a plurality of first diverter ribs connected to the diverter body and the diverter ring, respectively, and spaced apart along a circumferential direction of the diverter structure; The open-type earphone according to claim 13, characterized in that the mutually facing surfaces of the two adjacent first diverting ribs, the inner wall surface of the diverting body, and the outer wall of the diverting ring collectively define the sound-emitting opening.

15. The open-type earphone according to claim 14, characterized in that the diversion ring is hollow, and an internal sound-emitting port is provided around the inner wall surface of the diversion ring, and the internal sound-emitting port communicates with the front cavity.

16. The flow diverting structure includes a plurality of second flow diverting ribs arranged at intervals along the width direction of the sound-producing portion, the second flow diverting ribs extend along the length direction of the sound-producing portion, and the surfaces of two adjacent second flow diverting ribs facing each other jointly define the sound-producing opening, Alternatively, the open-type earphone according to claim 13, wherein the diversion structure includes a diversion body and a plurality of third diversion ribs, the diversion body being connected to an inner wall surface of the sound-producing part and being hollow, the plurality of third diversion ribs being connected to the inside of the diversion body and being arranged at intervals along the longitudinal direction of the sound-producing part, and the diversion body and the third diversion ribs collectively define the sound-producing opening.

17. The open-type earphone according to claim 1, wherein an included angle α is formed between an opening direction of the pressure relief portion and a vertical axis of the user, and the included angle α satisfies the relationship 0°≦α≦40°.

18. The open-type earphone according to claim 1, characterized in that the sound-producing unit is provided with a diaphragm, and in the thickness direction of the sound-producing housing, the distance between the center of the diaphragm and the sound-producing portion is L3, and the distance between the center of the diaphragm and the pressure relief portion is L4, satisfying the relationship L4 ≧ 1.05L3.

19. The fixing structure includes: A hanging part connected to the sound generating structure and suspended between an upper side of the ear and a user's head when worn; 2. The open-type earphone according to claim 1, further comprising: a rear end portion that is provided at an end of the hanging portion away from the sound-producing structure so that the sound-producing structure is positioned in front of the ear, that is affixed between the rear of the ear and the user's head when worn, and that cooperates with the hanging portion to hold the ear.

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