Electroacoustic transducer and earphone

Abstract

The utility model provides an electroacoustic transducer and an earphone, the electroacoustic transducer is provided with a hollow channel penetrating along the axial direction of the electroacoustic transducer, the electroacoustic transducer comprises a vibration system and a magnetic circuit system, the vibration system comprises a vibrating diaphragm, a first voice coil and a second voice coil, the vibrating diaphragm surrounds the hollow channel, the first voice coil is connected to the vibrating diaphragm and surrounds the hollow channel, and the second voice coil is connected to the vibrating diaphragm and surrounds the hollow channel. The second voice coil is connected to the diaphragm and surrounds the periphery of the first voice coil. The magnetic circuit system is used for driving the first voice coil and the second voice coil to move so as to enable the diaphragm to vibrate and produce sound. By adopting the mode of arranging the hollow channel in the electroacoustic transducer, the length of a circulating path of airflow or sound in the earphone shell can be reduced to the greatest extent, and the permeability of the earphone is effectively improved. Moreover, the first voice coil and the second voice coil are arranged, so that when the electroacoustic transducer works, the two voice coils work at the same time, larger driving force is provided for the vibrating diaphragm, the product performance can be effectively improved, and the high-frequency effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sound-generating instruments, and in particular to an electroacoustic transducer and an earphone. Background Art

[0002] An electroacoustic transducer, such as a loudspeaker or a speaker, may be a device for converting an audio signal into sound playback. Therefore, the electroacoustic transducer is widely used in headphones.

[0003] In the related art, in order to improve the comfort and transparency of headphones, headphones use relatively small speakers. However, in the related art, the sound effect of small speakers is not ideal, and the improvement of the transparency of headphones is also relatively limited, which cannot effectively improve the user's listening experience. Utility Model Content

[0004] The present application provides an electroacoustic transducer and earphones, which can effectively improve the user's listening experience.

[0005] The present application provides an electroacoustic transducer, the electroacoustic transducer having a hollow channel penetrating along its own axial direction, the electroacoustic transducer comprising a vibration system and a magnetic circuit system, the vibration system comprising a diaphragm, a first voice coil and a second voice coil, the diaphragm surrounds the hollow channel, the first voice coil is connected to the diaphragm and surrounds the hollow channel, and the second voice coil is connected to the diaphragm and surrounds the outer periphery of the first voice coil;

[0006] The magnetic circuit system has a magnetic gap, and at least part of the first voice coil and at least part of the second voice coil are located in the magnetic gap; the magnetic circuit system is used to drive the first voice coil and the second voice coil to move so that the diaphragm vibrates and produces sound.

[0007] Optionally, the diaphragm includes an inner fold ring, a first flat portion, a raised membrane top, a second flat portion and an outer fold ring which are connected in sequence, the inner fold ring surrounds the hollow channel, and the inner fold ring, the raised membrane top and the outer fold ring all protrude outward on the same side relative to the first flat portion, the first voice coil is connected to the first flat portion, and the second voice coil is connected to the second flat portion.

[0008] Optionally, a ratio of an area of ​​an orthographic projection of the raised membrane top on a first reference plane to an area of ​​an orthographic projection of the entire diaphragm on the first reference plane is between 0.2 and 0.7, wherein the first reference plane is perpendicular to the axial direction of the electroacoustic transducer.

[0009] Optionally, the raised membrane top is an outwardly raised arc-shaped structure or a planar structure.

[0010] Optionally, a ratio between an area of ​​an orthographic projection of the outer folding ring on the first reference plane and an area of ​​an orthographic projection of the entire diaphragm on the first reference plane is between 0.2 and 0.35.

[0011] Optionally, a ratio between an area of ​​an orthographic projection of the inner fold ring on the first reference plane and an area of ​​an orthographic projection of the entire diaphragm on the first reference plane is between 0.1 and 0.2.

[0012] Optionally, the inner fold ring is an arc-shaped structure protruding outward, and / or the outer fold ring is an arc-shaped structure protruding outward.

[0013] Optionally, the inner fold ring and / or the outer fold ring is provided with a texture structure.

[0014] Optionally, the inner fold ring, the raised membrane top and the outer fold ring are located on different sides of the first flat portion as are the first voice coil and the second voice coil.

[0015] Optionally, the electroacoustic transducer further comprises a basin frame, the basin frame comprises an annular basin frame inner side wall and an annular basin frame outer side wall, the basin frame inner side wall defines the hollow channel, and the basin frame outer side wall surrounds the basin frame inner side wall;

[0016] The diaphragm also includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the inner fold ring and surrounds the hollow channel, and the second connecting portion surrounds and is connected to the outer fold ring; the first connecting portion is connected to the inner wall of the basin frame, and the second connecting portion is connected to the outer wall of the basin frame.

[0017] Optionally, the ratio of the minimum diameter of the inner wall of the basin frame to the maximum diameter of the outer wall of the basin frame is between 0.1 and 0.5.

[0018] Optionally, the electroacoustic transducer further includes a first fixing ring and a second fixing ring, wherein the first fixing ring is fixedly connected to the first connecting portion and the inner wall of the basin frame, and the second fixing ring is fixedly connected to the second connecting portion and the outer wall of the basin frame.

[0019] Optionally, the ratio of the maximum outer diameter of the second fixing ring to the maximum outer diameter of the outer side wall of the basin frame is between 0.7 and 1;

[0020] And / or, the ratio of the minimum inner diameter of the first fixing ring to the maximum outer diameter of the outer side wall of the basin frame is between 0.1 and 0.5.

[0021] Optionally, the magnetic circuit system includes a first magnetic component, which is arranged on the basin frame and surrounds the inner wall of the basin frame, and a first magnetic gap and a second magnetic gap are formed between the first magnetic component and the basin frame, the first magnetic gap surrounds the inner wall of the basin frame, and the second magnetic gap surrounds the outer circumference of the first magnetic gap; one end of the first voice coil extends to the first magnetic gap, and one end of the second voice coil extends to the second magnetic gap.

[0022] Optionally, the magnetic circuit system includes a second magnetic component, a third magnetic component and a fourth magnetic component respectively arranged on the basin frame, the second magnetic component surrounds the inner wall of the basin frame, the third magnetic component surrounds the second magnetic component, and the fourth magnetic component surrounds the third magnetic component. A third magnetic gap is formed between the second magnetic component and the third magnetic component, and a fourth magnetic gap is formed between the third magnetic component and the fourth magnetic component. One end of the first voice coil extends to the third magnetic gap, and one end of the second voice coil extends to the fourth magnetic gap.

[0023] Optionally, the basin frame is provided with a rear tuning hole, and the rear tuning hole is connected to the magnetic gap of the magnetic circuit system.

[0024] Optionally, the electroacoustic transducer further includes an opening and closing component, wherein the opening and closing component is disposed in the hollow channel and is used to open or close the hollow channel.

[0025] In a second aspect, an embodiment of the present application further provides an earphone, comprising a housing and an electroacoustic transducer as described in any one of the above items, wherein the electroacoustic transducer is disposed in the housing.

[0026] The electroacoustic transducer and earphone provided by the present application are provided with a hollow channel on the electroacoustic transducer. In this way, when the electroacoustic transducer is installed on the shell of the earphone, it can cooperate with the earphone shell to provide an open listening environment for the ear, so that the user can listen to music while listening to external sounds, meeting the different listening needs of the user, and can also dissipate the heat inside the earphone to keep the ear in a comfortable state. In addition, by adopting the method of setting a hollow channel in the electroacoustic transducer, the path length of the airflow or sound flowing in the earphone shell can be minimized, effectively improving the permeability of the earphone. In addition, by setting the first voice coil and the second voice coil, when the electroacoustic transducer is working, the two voice coils work at the same time, providing a greater driving force to the diaphragm, which can effectively improve the product performance and improve the high-frequency effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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 these drawings without creative work.

[0028] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0029] Figure 1 A schematic diagram of the structure of an electroacoustic transducer provided in an embodiment of the present application;

[0030] Figure 2 for Figure 1 A cross-sectional view of the electroacoustic transducer shown;

[0031] Figure 3 A cross-sectional view of an earphone provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of a first structure of the electroacoustic transducer provided in an embodiment of the present application when an opening and closing component is installed;

[0033] Figure 5 A second structural schematic diagram of the electroacoustic transducer provided in an embodiment of the present application when an opening and closing component is installed;

[0034] Figure 6 A stereoscopic view of the earphone provided by an embodiment of the present application in a sealed state;

[0035] Figure 7 A stereoscopic view of the earphone provided by an embodiment of the present application in an open state;

[0036] Figure 8 A schematic diagram of the structure of a diaphragm, a first voice coil and a second voice coil provided in an embodiment of the present application;

[0037] Fig. 9 A first exploded schematic diagram of an electroacoustic transducer provided in an embodiment of the present application;

[0038] Fig.10 A cross-sectional view of an electroacoustic transducer provided in another embodiment of the present application;

[0039] Fig.11 A second explosion schematic diagram of the electroacoustic transducer provided in an embodiment of the present application.

[0040] Reference numerals:

[0041] 100. Headphones;

[0042] 10. Shell; 11. First sound outlet; 12. Outer side wall; 121. End hole; 13. Rear sound outlet;

[0043] 20. Electroacoustic transducer; 21. Hollow channel;

[0044] 22. Vibration system;

[0045] 221, diaphragm; 2211, inner folding ring; 2212, first flat portion; 2213, raised membrane top; 2214, second flat portion; 2215, outer folding ring; 2216, first connecting portion; 2217, second connecting portion;

[0046] 222, first voice coil; 223, second voice coil;

[0047] 23. Magnetic circuit system; 2311. First magnetic member; 2312. Second magnetic member; 2313. Third magnetic member; 2314. Fourth magnetic member; 2321. First magnetic gap; 2322. Second magnetic gap; 2323. Third magnetic gap; 2324. Fourth magnetic gap; 2331. First magnetic conductive member; 2332. Second magnetic conductive member; 2333. Third magnetic conductive member; 2334. Fourth magnetic conductive member;

[0048] 24, basin frame; 241, inner wall of basin frame; 242, outer wall of basin frame; 243, bottom wall of basin frame; 244, rear tuning hole;

[0049] 25. first fixing ring; 26. second fixing ring;

[0050] 30. Opening and closing components;

[0051] 40. a housing for covering the cavity; 50. an ear pad;

[0052] 200. Ears. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0054] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the relative position relationship after connection remains unchanged. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after connection. "Sliding connection" means that the two are connected to each other and can slide relative to each other after connection. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "top", "bottom", "inside", "outside", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" means at least two.

[0055] In the embodiments of the present application, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0056] In the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0058] The present application will be described in detail below with reference to embodiments.

[0059] It can be understood that the electroacoustic transducer of the present application can be applied to electronic devices, such as headphones or wearable devices that realize audio input by approaching the human ear canal or by inserting it into the ear. When the electronic device is a headset, the headset can be a wired headset, a true wireless stereo (True Wireless Stereo, TWS) headset, or an open stereo (Open Wearable Stereo, OWS) headset. Exemplarily, the present application uses the application of an electroacoustic transducer to an earmuff headset as an example for explanation, wherein the earmuff headset can be covered on the ear when worn on the ear, so that the entire ear is covered in the cavity formed by the headset and the head.

[0060] It should be noted that in the related art, in order to improve the comfort and transparency of headphones, headphones usually use relatively small speakers. However, in the related art, the sound effect of small speakers is not ideal, and the improvement of the transparency of headphones is also relatively limited, and cannot effectively improve the user's listening experience.

[0061] Based on this, see Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of an electroacoustic transducer provided in an embodiment of the present application, Figure 2 for Figure 1 The embodiment of the present application provides an electroacoustic transducer 20, wherein the electroacoustic transducer 20 has a hollow channel 21 extending through the electroacoustic transducer 20 along its own axis, wherein the electroacoustic transducer 20 includes a vibration system 22 and a magnetic circuit system 23, wherein the vibration system 22 includes a diaphragm 221, a first voice coil 222, and a second voice coil 223, wherein the diaphragm 221 surrounds the hollow channel 21, the first voice coil 222 is connected to the diaphragm 221 and surrounds the hollow channel 21, and the second voice coil 223 is connected to the diaphragm 221 and surrounds the outer periphery of the first voice coil 222.

[0062] The magnetic circuit system 23 has a magnetic gap, in which at least part of the first voice coil 222 and at least part of the second voice coil 223 are located; the magnetic circuit system 23 is used to drive the first voice coil 222 and the second voice coil 223 to move so that the diaphragm 221 vibrates and produces sound.

[0063] It can be understood that, since the electroacoustic transducer 20 is provided with a through hollow passage 21 , the electroacoustic transducer 20 is generally in a ring-shaped structure.

[0064] It is also understandable that see Figure 3 , Figure 3A cross-sectional view of an earphone provided in an embodiment of the present application. The electroacoustic transducer 20 of the present application can be arranged in the shell 10 of the earphone 100, wherein the shell 10 of the earphone 100 is provided with an end hole 121 communicating with the external environment, and the shell 10 of the earphone 100 has a first sound outlet 11, and the first sound outlet 11 is located on the side of the shell 10 facing the ear 200. When the electroacoustic transducer 20 is installed in the shell 10, the hollow channel 21 of the electroacoustic transducer 20 is connected with the first sound outlet 11 and the end hole 121. It can be understood that when the earphone 100 is worn on the ear 200, the sound signal emitted by the electroacoustic transducer 20 can be transmitted to the ear hole of the human ear through the first sound outlet 11, and then enter the ear canal.

[0065] Exemplarily, the housing 10 includes an outer wall 12, which is arranged opposite to the electroacoustic transducer 20 in the axial direction of the electroacoustic transducer 20, and is provided with an end hole 121, which connects the hollow channel 21 with the external environment. In this way, since the first sound outlet 11 is connected with the hollow channel 21, the first sound outlet 11 can be connected with the external environment through the hollow channel 21 and the end hole 121, so that the airflow can be conducted and the sound can be transmitted.

[0066] It can be understood that the electroacoustic transducer 20 provided in the embodiment of the present application is provided with a hollow channel 21 connected to the first sound outlet hole 11 on the electroacoustic transducer 20, and when the electroacoustic transducer 20 is installed on the shell 10 of the earphone 100, the hollow channel 21 of the electroacoustic transducer 20 is connected to the end hole 121 on the shell 10 of the earphone 100. In this way, the first sound outlet hole 11 is connected to the end hole 121 through the hollow channel 21, so that the first sound outlet hole 11 can be connected with the external environment, thereby providing an open listening environment for the ear 200, allowing the user to listen to music while also listening to external sounds, thereby meeting the user's different listening needs, and can also dissipate the heat inside the earphone 100 to keep the ear 200 comfortable.

[0067] In addition, by setting a hollow channel 21 in the electroacoustic transducer 20, the path length of the airflow or sound flowing between the first sound outlet 11 and the end hole 121 can be minimized, thereby effectively improving the permeability of the earphone 100. Moreover, by setting the end hole 121 on the outer wall 12 opposite to the electroacoustic transducer 20, the distance between the end hole 121 and the hollow channel 21 can be better reduced, thereby further reducing the path length of the airflow or sound flowing between the first sound outlet 11 and the end hole 121, thereby further improving the permeability of the earphone 100.

[0068] In addition, by providing the first voice coil 222 and the second voice coil 223, when the electroacoustic transducer 20 is working, the two voice coils work simultaneously, providing a greater driving force to the diaphragm 221, which can effectively enhance product performance and improve high-frequency effects.

[0069] In order to realize the function of opening or closing the hollow channel 21, please refer to Figure 4 and Figure 5 , Figure 4 A schematic diagram of a first structure of the electroacoustic transducer provided in an embodiment of the present application when an opening and closing component is installed, Figure 5 The second structural diagram of the electroacoustic transducer provided in the embodiment of the present application when the opening and closing components are installed. It can be understood that Figure 4 The opening and closing components in are in the open state. Figure 5 The opening and closing component is in a closed state. The electroacoustic transducer 20 may further include an opening and closing component 30 , which is disposed in the hollow channel 21 and is used to open or close the hollow channel 21 .

[0070] It can be understood that when the opening and closing component 30 is in a closed state, the hollow channel 21 is in a closed state, and the first sound outlet hole 11 and the end hole 121 are not connected, so that a closed listening environment can be provided for the ear 200 to meet the needs of the user's immersive experience. When the opening and closing component 30 is in an open state, the hollow channel 21 is in an open state, and the first sound outlet hole 11 can be connected to the end hole 121 through the hollow channel 21, so that the first sound outlet hole 11 is connected to the external environment, so that an open listening environment can be provided for the ear 200, so that the user can listen to music while also listening to external sounds, meeting the different listening needs of the user, and can also dissipate the heat inside the earphone 100 to keep the ear 200 in a comfortable state.

[0071] It can also be understood that the shape of the first sound hole 11 and the end hole 121 can be circular, but is not limited to a circle, and can also include one or more of an ellipse, a runway, a triangle, a rectangle, a polygon or other complex shapes with decorative properties, and the present application does not impose any limitation thereto.

[0072] Among them, in order to improve the transparency of the earphone 100, the sizes of the first sound hole 11, the end hole 121 and the hollow channel 21 can be made as large as possible, that is, the larger the cross-sectional area of ​​the first sound hole 11, the end hole 121 and the hollow channel 21, the better the transparency of the earphone 100.

[0073] Exemplarily, the minimum cross-sectional area of ​​the first sound outlet hole 11 is greater than or equal to 15 square millimeters. In this way, the transparency of the earphone 100 can be effectively improved, and the quality of sound transmission can also be improved. Further preferably, the minimum cross-sectional area of ​​the first sound outlet hole 11 is greater than or equal to 25 square millimeters, and further preferably, the minimum cross-sectional area of ​​the first sound outlet hole 11 is greater than or equal to 40 square millimeters.

[0074] It should be noted that the opening and closing component 30 is a component for opening or closing the hollow channel 21, and is mainly used for opening or closing the hollow channel 21. The present application does not impose any specific restrictions on its structure, as long as it can realize the opening or closing of the hollow channel 21. For example, the opening and closing component 30 can be a shutter component similar to a "shutter" structure, and the shutter component can include a plurality of blades, and the plurality of blades can move radially relative to the hollow channel 21 along the hollow channel 21, and the plurality of blades can approach each other to realize the closing function, and the plurality of blades can move away from each other to realize the opening function. Exemplarily, a three-dimensional view of the sealed state of the earphone 100 is shown in FIG. Figure 6 As shown, the stereoscopic view of the open state of the headset 100 is as shown in FIG. Figure 7 shown.

[0075] In some embodiments, when the electroacoustic transducer 20 is installed on the shell 10 of the earphone 100, the opening and closing component 30 of the electroacoustic transducer 20 can be connected to a linkage mechanism (not shown) arranged on the shell 10, one end of the linkage structure is located on the outside of the shell 10, and the other end of the linkage mechanism is connected to the opening and closing component 30, such as connected to the blades of the opening and closing component 30. The user drives the linkage mechanism to open or close the opening and closing component 30 to achieve switching between the open state and the sealed state of the earphone 100.

[0076] In other embodiments, the linkage mechanism can be connected to a motor, and the motor is used to drive the linkage mechanism to realize the opening or closing of the opening and closing component 30. For example, the motor can receive instructions from the main control chip of the headset 100 to control the opening or closing of the opening and closing component 30.

[0077] In some other embodiments, the opening and closing component 30 may be disposed opposite to the communication area of ​​the first sound outlet hole 11 , the hollow passage 21 and the end hole 121 , so as to open or close the communication between the first sound outlet hole 11 and the external environment.

[0078] According to the above definition, the opening and closing component 30 is arranged at the hollow passage 21 of the electroacoustic transducer 20, and is used to open or close the hollow passage 21. It can be understood that when the opening and closing component 30 is in a closed state, there is no communication between the first sound outlet 11 and the end hole 121. When the opening and closing component 30 is in an open state, the first sound outlet 11 can be communicated with the end hole 121 through the hollow passage 21, thereby realizing the communication between the first sound outlet 11 and the external environment.

[0079] Alternatively, the opening and closing component 30 may also be disposed on the housing 10. For example, the opening and closing component 30 may be disposed on one side of the first sound outlet 11, for opening or closing the first sound outlet 11. In this way, the connection between the first sound outlet 11 and the external environment may be opened or closed by opening and closing the first sound outlet 11. For another example, the opening and closing component 30 may also be disposed on one side of the end surface hole 121, for opening or closing the end surface hole 121. In this way, the connection between the first sound outlet 11 and the external environment may be opened or closed by opening and closing the end surface hole 121.

[0080] In order to more clearly introduce the specific structure of the electroacoustic transducer 20 , the specific structure of the electroacoustic transducer 20 will be described in detail below with reference to the accompanying drawings.

[0081] It can be understood that the diaphragm 221 is the main sound-generating component of the electroacoustic transducer 20. Figure 8 Combined with Figure 2 , Figure 8 The structural schematic diagram of the diaphragm, the first voice coil and the second voice coil provided in the embodiment of the present application. The diaphragm 221 includes an inner folding ring 2211, a first flat portion 2212, a raised membrane top 2213, a second flat portion 2214 and an outer folding ring 2215 connected in sequence, the inner folding ring 2211 surrounds the hollow channel 21, and the inner folding ring 2211, the raised membrane top 2213 and the outer folding ring 2215 are all protruding outwards relative to the same side of the first flat portion 2212. It can be understood that the shapes of the inner folding ring 2211, the first flat portion 2212, the raised membrane top 2213, the second flat portion 2214 and the outer folding ring 2215 are all annular. The first voice coil 222 is connected to the first flat portion 2212, and the second voice coil 223 is connected to the second flat portion 2214. It can be understood that the first voice coil 222 and the second voice coil 223 are annular structures. Among them, the inner fold ring 2211, the raised membrane top 2213 and the outer fold ring 2215 all protrude outward relative to the same side of the first flat portion 2212, which can be understood as the inner fold ring 2211, the raised membrane top 2213 and the outer fold ring 2215 all protrude relative to the same side of the first flat portion 2212, and the protruding direction is the side of the first flat portion 2212 away from the first voice coil 222, that is, the raised structure formed by the inner fold ring 2211, the raised membrane top 2213 and the outer fold ring 2215 and the first voice coil 222 are located on both sides of the first flat portion 2212.

[0082] In the present application, by setting the first flat portion 2212 and the second flat portion 2214, the first voice coil 222 and the second voice coil 223 can be fixed, and the diaphragm 221 is also bent to form a structure in which the inner fold ring 2211, the raised membrane top 2213 and the outer fold ring 2215 are protruded outward on the same side relative to the first flat portion 2212, so that when the diaphragm 221 vibrates, the inner fold ring 2211, the raised membrane top 2213 and the outer fold ring 2215 can cooperate with each other, which will not cause excessive pulling of the diaphragm 221, and can effectively ensure the vibration effect of the diaphragm 221, thereby improving the audio quality.

[0083] For ease of understanding, a first reference plane perpendicular to the axial direction of the electroacoustic transducer 20 may be made. In some embodiments, the ratio of the area of ​​the orthographic projection of the convex membrane top 2213 on the first reference plane to the area of ​​the orthographic projection of the entire diaphragm 221 on the first reference plane is between 0.2 and 0.7. For example, the ratio of the area of ​​the orthographic projection of the convex membrane top 2213 on the first reference plane to the area of ​​the orthographic projection of the entire diaphragm 221 on the first reference plane is 0.2, 0.5 or 0.7, which can effectively improve the high-frequency effect of the electroacoustic transducer 20.

[0084] The inner fold ring 2211, the raised membrane top 2213 and the outer fold ring 2215 may have the same raised height relative to the first flat portion 2212. Alternatively, the three raised heights may be different. For example, the raised height of the raised membrane top 2213 relative to the first flat portion 2212 is greater than the raised height of the inner fold ring 2211 and the outer fold ring 2215 relative to the first flat portion 2212. In this way, the high-pitched sound effect of the electroacoustic transducer 20 disposed in the earphone 100 can be improved.

[0085] Furthermore, the present application combines the configuration of the inner fold ring 2211 and the outer fold ring 2215 to take into account the bass sound effect of the electroacoustic transducer 20 disposed in the earphone 100, thereby improving the sound effect of the earphone 100 in multiple dimensions.

[0086] In other embodiments, the inner fold ring 2211, the raised membrane top 2213 and the outer fold ring 2215 may also bulge toward different sides relative to the first flat portion 2212. For example, the raised membrane top 2213 bulges toward the direction close to the magnetic circuit system 23 relative to the first flat portion 2212, and the inner fold ring 2211 and the outer fold ring 2215 bulge toward the direction away from the magnetic circuit system 23 relative to the first flat portion 2212. For another example, the raised membrane top 2213 bulges toward the direction away from the magnetic circuit system 23 relative to the first flat portion 2212, and the inner fold ring 2211 and the outer fold ring 2215 bulge toward the direction close to the magnetic circuit system 23 relative to the first flat portion 2212. In this way, the structural flexibility of the diaphragm 221 can be improved, and it is suitable for earphones 100 with different structures.

[0087] Optional, see Figure 2 , the inner folding ring 2211, the raised membrane top 2213 and the outer folding ring 2215 are located on different sides of the first flat part 2212 from the first voice coil 222 and the second voice coil 223. Specifically, the inner folding ring 2211, the raised membrane top 2213 and the outer folding ring 2215 are located on the side of the first flat part 2212 away from the magnetic circuit system 23. In this way, the inner folding ring 2211, the raised membrane top 2213 and the outer folding ring 2215 can be prevented from interfering with the magnetic circuit system 23 when vibrating, thereby ensuring the vibration effect of the three. In addition, the first voice coil 222 and the second voice coil 223 are located on the side of the first flat part 2212 close to the magnetic circuit system 23, so that the magnetic circuit system 23 can be closer to the first voice coil 222 and the second voice coil 223, and the magnetic field generated by the magnetic circuit system 23 can better act on the two to drive the two to move.

[0088] In order to further improve the high-frequency effect of the electroacoustic transducer 20, the raised membrane top 2213 may be set to an outwardly raised arc structure or a plane structure.

[0089] It can be understood that when the raised membrane top 2213 vibrates, the high-frequency effect is related to the thickness of the material of the raised membrane top 2213 itself. If the thickness is too thick or too thin, it will affect its high-frequency effect. Based on this, in the embodiment of the present application, the thickness of the raised membrane top 2213 is set between 30 microns and 70 microns. For example, the thickness of the raised membrane top 2213 can be set to 30 microns, 50 microns or 70 microns. In this way, the high-frequency effect of the raised membrane top 2213 will not be greatly affected.

[0090] It can also be understood that the high-frequency effect of the electroacoustic transducer 20 is also related to the structure of the outer folding ring 2215 and the inner folding ring 2211 .

[0091] Based on this, in the embodiment of the present application, the outer folding ring 2215 can be set to have a ratio between the area of ​​the orthographic projection of the outer folding ring 2215 on the first reference plane and the area of ​​the orthographic projection of the diaphragm 221 as a whole on the first reference plane of 0.2 to 0.35, such as, the ratio between the area of ​​the orthographic projection of the outer folding ring 2215 on the first reference plane and the area of ​​the orthographic projection of the diaphragm 221 as a whole on the first reference plane is 0.2, 0.25 or 0.35, which can effectively improve the high-frequency effect of the electroacoustic transducer 20. Among them, the ratio between the area of ​​the orthographic projection of the outer folding ring 2215 on the first reference plane and the area of ​​the orthographic projection of the diaphragm 221 as a whole on the first reference plane can be set as large as possible, so as to help reduce the resonance frequency and improve the low-frequency sound quality.

[0092] It can also be understood that when the outer fold ring 2215 vibrates, the high-frequency effect is related to the thickness of the material of the outer fold ring 2215 itself. If the thickness is too thick or too thin, it will affect its high-frequency effect. Based on this, in the embodiment of the present application, the thickness of the outer fold ring 2215 is set between 35 microns and 80 microns. For example, the thickness of the outer fold ring 2215 can be set to 35 microns, 55 microns or 80 microns. In this way, the high-frequency effect of the outer fold ring 2215 will not be greatly affected.

[0093] In the embodiment of the present application, the inner fold ring 2211 can be set such that the ratio between the area of ​​the orthographic projection of the inner fold ring 2211 on the first reference plane and the area of ​​the orthographic projection of the entire diaphragm 221 on the first reference plane is between 0.1 and 0.2. For example, the ratio between the area of ​​the orthographic projection of the inner fold ring 2211 on the first reference plane and the area of ​​the orthographic projection of the entire diaphragm 221 on the first reference plane is 0.1, 0.15 or 0.2, which can effectively improve the high-frequency effect of the electroacoustic transducer 20.

[0094] It can also be understood that when the inner fold ring 2211 vibrates, the high-frequency effect is related to the thickness of the material of the inner fold ring 2211 itself. If the thickness is too thick or too thin, it will affect its high-frequency effect. Based on this, in an embodiment of the present application, the thickness of the inner fold ring 2211 is set between 35 microns and 80 microns. For example, the thickness of the inner fold ring 2211 can be set to 35 microns, 55 microns or 80 microns. In this way, the high-frequency effect of the inner fold ring 2211 will not be greatly affected.

[0095] The inner fold ring 2211 is an outwardly protruding arc structure, and the outer fold ring 2215 is an outwardly protruding arc structure. In this way, when the diaphragm 221 vibrates, the inner fold ring 2211, the protruding membrane top 2213 and the outer fold ring 2215 can cooperate with each other, which will not cause excessive pulling of the diaphragm 221, and can effectively ensure the vibration effect of the diaphragm 221, thereby improving the audio quality.

[0096] The texture structure may be provided on one of the inner fold ring 2211 and the outer fold ring 2215, or both of them. It is understandable that the texture structure may form a reinforcing rib structure, thereby enhancing the rigidity of the diaphragm 221, reducing the deformation of the diaphragm 221 during vibration, and thus reducing the distortion in the low frequency band.

[0097] It can be understood that in order to fix the diaphragm 221, please refer to Fig. 9 Combined with Figure 1 and Figure 2 , Fig. 9The first exploded schematic diagram of the electroacoustic transducer provided in the embodiment of the present application. The electroacoustic transducer 20 also includes a basin frame 24, the basin frame 24 includes an annular basin frame inner side wall 241 and an annular basin frame outer side wall 242, the basin frame inner side wall 241 defines a hollow channel 21, and the basin frame outer side wall 242 surrounds the basin frame inner side wall 241.

[0098] It is also understandable that the basin frame 24 can be made of one or more materials such as metal, plastic or resin.

[0099] Among them, Figure 1 , Figure 2 and Figure 8 As shown, the diaphragm 221 further includes a first connection portion 2216 and a second connection portion 2217, wherein the first connection portion 2216 is connected to the inner fold ring 2211 and surrounds the hollow channel 21, and the second connection portion 2217 surrounds and connects to the outer fold ring 2215. It can be understood that the first connection portion 2216 and the second connection portion 2217 are both annular structures, wherein the first connection portion 2216 is connected to the inner side wall 241 of the basin frame, and the second connection portion 2217 is connected to the outer side wall 242 of the basin frame. In this way, the diaphragm 221 can be fixedly connected to the basin frame 24.

[0100] Since the inner wall of the basin frame 24 defines the hollow channel 21, it can be understood that the diameter of the inner wall 241 of the basin frame determines the cross-sectional area of ​​the hollow channel 21, and the larger the cross-sectional area of ​​the hollow channel 21, the better the permeability of the electroacoustic transducer 20. Based on this, in some embodiments, such as Figure 2 As shown, the ratio between the minimum diameter D2 of the inner side wall 241 of the basin frame and the maximum diameter D1 of the outer side wall 242 of the basin frame is set between 0.1 and 0.5. In this way, when the size of the basin frame 24 itself is constant, the diameter of the inner side wall 241 of the basin frame can be increased as much as possible without greatly reducing the strength of the basin frame 24, that is, the cross-sectional area of ​​the hollow channel 21 can be increased as much as possible, thereby improving the permeability of the electroacoustic transducer 20.

[0101] Optionally, the ratio between the minimum diameter D2 of the inner side wall 241 of the basin frame and the maximum diameter D1 of the outer side wall 242 of the basin frame is set to 0.2-0.4, or 0.2-0.5. Alternatively, the ratio between the minimum diameter D2 of the inner side wall 241 of the basin frame and the maximum diameter D1 of the outer side wall 242 of the basin frame is set to 0.3, 0.35, 0.4 or 0.45.

[0102] It can be understood that the basin frame 24 is a component that supports the diaphragm 221 , and the first connecting portion 2216 and the second connecting portion 2217 of the diaphragm 221 can be directly connected to the basin frame 24 .

[0103] In some embodiments, in order to improve the connection strength between the diaphragm 221 and the basin frame 24, as shown in FIG. Figure 2 and Figure 8 As shown, the electroacoustic transducer 20 may further include a first fixing ring 25 and a second fixing ring 26, wherein the first fixing ring 25 is fixedly connected to the first connection portion 2216 and the inner side wall 241 of the basin frame, that is, the first connection portion 2216 is fixedly connected to the inner side wall 241 of the basin frame through the first fixing ring 25. The second fixing ring 26 is fixedly connected to the second connection portion 2217 and the outer side wall 242 of the basin frame, that is, the second connection portion 2217 is fixedly connected to the outer side wall 242 of the basin frame through the second fixing ring 26. In this way, under the connection and fixation of the first fixing ring 25 and the second fixing ring 26, a stable connection is achieved between the diaphragm 221 and the basin frame 24.

[0104] The first fixing ring 25 and the second fixing ring 26 may be made of steel. For example, the first fixing ring 25 and the second fixing ring 26 may both be steel rings.

[0105] It can be understood that since the maximum outer diameter of the second fixing ring 26 is related to the maximum outer diameter of the outer wall 242 of the basin frame, that is, the larger the maximum outer diameter of the outer wall 242 of the basin frame is, the larger the maximum outer diameter of the second fixing ring 26 can be made accordingly, and the diaphragm 221 is connected to the outer wall 242 of the basin frame through the second fixing ring 26, therefore, the larger the maximum outer diameter of the second fixing ring 26 is, the larger the maximum outer diameter of the diaphragm 221 can also be made. At this time, the frequency response effect of the diaphragm 221 is better. Based on this, in order to better increase the diameter of the diaphragm 221, in the present application, Figure 2 As shown, the ratio between the maximum outer diameter d1 of the second fixing ring 26 and the maximum diameter D1 of the outer wall 242 of the basin frame is set between 0.7 and 1. In this way, the diameter of the diaphragm 221 can be made larger, that is, the frequency response effect of the diaphragm 221 can be improved.

[0106] Optionally, the ratio of the maximum outer diameter d1 of the second fixing ring 26 to the maximum diameter D1 of the outer wall 242 of the basin frame may be between 0.8 and 1, or between 0.9 and 1. Alternatively, the ratio of the maximum outer diameter d1 of the second fixing ring 26 to the maximum diameter D1 of the outer wall 242 of the basin frame may be 0.75, 0.85 or 0.95.

[0107] Preferably, the ratio between the maximum outer diameter d1 of the second fixing ring 26 and the maximum diameter D1 of the outer side wall 242 of the basin frame is 1. In this case, the diameter of the diaphragm 221 can be made as large as possible, and the frequency response effect is optimal.

[0108] It can also be understood that, since the diaphragm 221 is also connected to the inner side wall 241 of the basin frame through the first fixing ring 25, and the first fixing ring 25 surrounds the hollow channel 21 defined by the inner side wall 241 of the basin frame, the minimum inner diameter of the first fixing ring 25 is related to the cross-sectional area of ​​the hollow channel 21. In order to increase the cross-sectional area of ​​the hollow channel 21, the minimum inner diameter of the first fixing ring 25 needs to be made larger. In this application, Figure 2 As shown, the ratio between the minimum inner diameter d2 of the first fixing ring 25 and the maximum diameter D1 of the outer wall 242 of the basin frame is set between 0.1 and 0.5. At this time, the first fixing ring 25 has a more appropriate minimum inner diameter, thereby ensuring the transparency of the electroacoustic transducer 20.

[0109] Optionally, the ratio between the minimum inner diameter d2 of the first fixing ring 25 and the maximum diameter D1 of the outer wall 242 of the basin frame is set to 0.2-0.4, or 0.2-0.5. Alternatively, the ratio between the minimum inner diameter d2 of the first fixing ring 25 and the maximum diameter D1 of the outer wall 242 of the basin frame is set to 0.3, 0.35, 0.4 or 0.45.

[0110] It should be noted that in the electroacoustic transducer 20, the magnetic circuit system 23 has a magnetic gap, and at least part of the first voice coil 222 and at least part of the second voice coil 223 are located in the magnetic gap. In this way, the first voice coil 222 and the second voice coil 223 are driven by the magnetic circuit system 23 to drive the diaphragm 221 to vibrate, that is, the vibration effect of the diaphragm 221 is related to the magnetic circuit system 23. Based on this, in order to improve the driving force of the electroacoustic transducer 20 and improve the sound pressure level of the electroacoustic transducer 20, in this application, the first voice coil 222 and the second voice coil 223 are driven to move by the dual magnetic circuit system 23. Please refer to Figure 2 and Fig. 9 The magnetic circuit system 23 includes a second magnetic component 2312, a third magnetic component 2313 and a fourth magnetic component 2314 respectively arranged on the basin frame 24, the second magnetic component 2312 surrounds the inner wall 241 of the basin frame, the third magnetic component 2313 surrounds the second magnetic component 2312, and the fourth magnetic component 2314 surrounds the third magnetic component 2313. It can be understood that the second magnetic component 2312, the third magnetic component 2313 and the fourth magnetic component 2314 are annular structures, wherein the second magnetic component 2312 and the third magnetic component 2313 are radially spaced to form a third magnetic gap 2323, the third magnetic component 2313 and the fourth magnetic component 2314 are radially spaced to form a fourth magnetic gap 2324, one end of the first voice coil 222 extends to the third magnetic gap 2323, and one end of the second voice coil 223 extends to the fourth magnetic gap 2324.

[0111] It can be understood that there are magnetic fields with certain magnetic field directions in the third magnetic gap 2323 and the fourth magnetic gap 2324 , so the voice coil located in the magnetic gap can move under the action of the magnetic field and drive the diaphragm 221 to vibrate.

[0112] In some embodiments, the entire first voice coil 222 and the entire second voice coil 223 may be located in the magnetic gap. It is understandable that along the thickness direction of the electroacoustic transducer 20, the entire first voice coil 222 may extend to the third magnetic gap 2323, and the entire second voice coil 223 may extend to the fourth magnetic gap 2324. In this way, it is ensured that the magnetic field in the third magnetic gap 2323 effectively acts on the first voice coil 222, and the magnetic field in the fourth magnetic gap 2324 effectively acts on the second voice coil 223, thereby facilitating the entire first voice coil 222 and the second voice coil 223 to drive the diaphragm 221 to vibrate, thereby improving the sound effect of the electroacoustic transducer 20. In addition, the entire voice coil is located in the magnetic gap, which helps to reduce the thickness of the electroacoustic transducer 20 and is conducive to its development towards a small volume.

[0113] In other embodiments, part of the first voice coil 222 and part of the second voice coil 223 may be located in the magnetic gap. It is understandable that along the thickness direction of the electroacoustic transducer 20, part of the end of the first voice coil 222 may extend to the third magnetic gap 2323, and part of the end of the second voice coil 223 may extend to the fourth magnetic gap 2324. In this way, the difficulty of assembling and aligning the voice coil and each magnetic component can be reduced. In addition, when the voice coil is located in the magnetic gap, the structure between each magnetic component and the voice coil is prevented from interfering with each other and wearing each other, so that the structural setting of this embodiment helps to improve the structural stability of the electroacoustic transducer 20.

[0114] Among them, the vibration effect of the electroacoustic transducer 20 is related to the size of the magnetic gap. Based on this, in order to effectively improve the low-frequency harmonic distortion problem of the electroacoustic transducer 20, in the present application, the size of the third magnetic gap 2323 and the fourth magnetic gap 2324 is set between 0.5 mm and 1.3 mm, so as to facilitate the improvement of low-frequency harmonic distortion. For example, the size of the third magnetic gap 2323 and the fourth magnetic gap 2324 can be set to 0.5 mm, 0.8 mm, 1.1 mm or 1.3 mm. Preferably, the size of the third magnetic gap 2323 and the fourth magnetic gap 2324 is set to 0.5 mm.

[0115] It is also understandable that in order to improve the magnetic conductivity, Figure 2 and Fig. 9As shown, the magnetic circuit system 23 may further include a first magnetic conductive member 2331, a second magnetic conductive member 2332 and a third magnetic conductive member 2333, wherein the magnetic conductive member may also be referred to as a washer. Exemplarily, the first magnetic conductive member 2331, the second magnetic conductive member 2332 and the third magnetic conductive member 2333 are in an annular structure, the first magnetic conductive member 2331 is arranged on the side of the second magnetic member 2312 facing the diaphragm 221, the second magnetic conductive member 2332 is arranged on the side of the third magnetic member 2313 facing the diaphragm 221, and the third magnetic conductive member 2333 is arranged on the side of the fourth magnetic member 2314 facing the diaphragm 221. For example, the first magnetic conductive component 2331 can be fixed to the surface of the second magnetic component 2312 facing the diaphragm 221 by gluing, the second magnetic conductive component 2332 can be fixed to the surface of the third magnetic component 2313 facing the diaphragm 221 by gluing, and the third magnetic conductive component 2333 can be fixed to the surface of the fourth magnetic component 2314 facing the diaphragm 221 by gluing.

[0116] It is understandable that the first magnetic conductive member 2331, the second magnetic conductive member 2332 and the third magnetic conductive member 2333 may be made of magnetic conductive materials. The second magnetic member 2312, the third magnetic member 2313 and the fourth magnetic member 2314 may be made of magnetic materials. For example, the magnetic material may be a magnet.

[0117] In other embodiments, in order to reduce costs, the first voice coil 222 and the second voice coil 223 may be driven to move by a single magnetic circuit system 23. Fig.10 and Fig.11 , Fig.10 A cross-sectional view of an electroacoustic transducer provided in another embodiment of the present application, Fig.11 A second exploded schematic diagram of an electroacoustic transducer provided in an embodiment of the present application. At this time, the magnetic circuit system 23 includes a first magnetic member 2311, which is arranged on the basin frame 24 and surrounds the inner side wall 241 of the basin frame, and the first magnetic member 2311 and the basin frame 24 are spaced apart to form a first magnetic gap 2321 and a second magnetic gap 2322. The first magnetic gap 2321 surrounds the inner side wall 241 of the basin frame, and the second magnetic gap 2322 surrounds the outer periphery of the first magnetic gap 2321. Exemplarily, the first magnetic member 2311 and the inner side wall 241 of the basin frame are spaced apart to form a first magnetic gap 2321, and the first magnetic member 2311 and the outer side wall 242 of the basin frame are spaced apart to form a second magnetic gap 2322. One end of the first voice coil 222 extends to the first magnetic gap 2321, and one end of the second voice coil 223 extends to the second magnetic gap 2322.

[0118] It can be understood that there are magnetic fields with certain magnetic field directions in the first magnetic gap 2321 and the second magnetic gap 2322 , so the voice coil located in the magnetic gap can move under the action of the magnetic field and drive the diaphragm 221 to vibrate.

[0119] Among them, the vibration effect of the electroacoustic transducer 20 is related to the size of the magnetic gap. Based on this, in order to effectively improve the low-frequency harmonic distortion problem of the electroacoustic transducer 20, in the embodiment of the present application, the size of the first magnetic gap 2321 and the second magnetic gap 2322 is set between 0.5 mm and 1.3 mm, so as to facilitate the improvement of low-frequency harmonic distortion. For example, the size of the first magnetic gap 2321 and the second magnetic gap 2322 can be set to 0.5 mm, 0.8 mm, 1.1 mm or 1.3 mm. Preferably, the size of the first magnetic gap 2321 and the second magnetic gap 2322 is set to 0.5 mm.

[0120] It can also be understood that, in order to improve the magnetic conductivity, the magnetic circuit system 23 can also include a fourth magnetic conductive member 2334, wherein the magnetic conductive member can also be called a washer. Exemplarily, the fourth magnetic conductive member 2334 is an annular structure, and the fourth magnetic conductive member 2334 is arranged on the side of the first magnetic member 2311 facing the diaphragm 221. For example, the fourth magnetic conductive member 2334 can be fixed to the surface of the first magnetic member 2311 facing the diaphragm 221 by gluing.

[0121] It is understandable that the fourth magnetic conductive member 2334 may be made of a magnetic conductive material. The material of the first magnetic member 2311 may be a magnetic material. For example, the magnetic material may be a magnet.

[0122] It can also be understood that the basin frame 24 is used as a supporting component of the electroacoustic transducer 20. In some embodiments, see Figure 2 and Figure 4 The basin frame 24 may further include a basin frame bottom wall 243 , and the basin frame bottom wall 243 and the diaphragm 221 are arranged opposite to each other in the axial direction of the electroacoustic transducer 20 , wherein the magnetic circuit system 23 is carried on the basin frame bottom wall 243 , that is, the basin frame bottom wall 243 plays the role of carrying the magnetic circuit system 23 .

[0123] In some embodiments, please refer to Figure 2 and Figure 4 In order to achieve the tuning function, the basin frame 24 is also provided with a rear tuning hole 244, which is connected to the magnetic gap of the magnetic circuit system 23. For example, the rear tuning hole 244 can be provided on the bottom wall 243 of the basin frame. It is understandable that the rear sound outlet hole 13 connected to the rear tuning hole 244 can also be provided on the housing 10 of the earphone 100, such as, for example, Figure 3 The shell 10 has a rear sound hole 13, which is located on the side of the shell 10 away from the ear 200. The tuning function can be achieved through the mutual cooperation between the rear tuning hole 244 and the rear sound hole 13.

[0124] The above is an introduction to the specific structure of the electroacoustic transducer 20 . The structure of the earphone 100 will be further described below with reference to the accompanying drawings.

[0125] In some embodiments, see Figure 3 In order to better cover the earphone 100 on the ear 200, a covering cavity 40 is formed on the side of the earphone 100 facing the ear 200, and the first sound outlet 11 is connected with the covering cavity 40. When the earphone 100 is worn, the covering cavity 40 covers the ear 200. It can be understood that at this time, the sound signal generated by the diaphragm 221 of the electroacoustic transducer 20 can be transmitted to the covering cavity 40 through the first sound outlet 11, and further transmitted to the ear hole of the human ear, and then enters the ear canal.

[0126] For example, please refer to Figure 3 The earphone 100 may include an ear pad 50, which is disposed around the side of the housing 10 facing the ear 200, and the ear pad 50 defines a covering cavity 40. When the earphone 100 is worn, the ear pad 50 fits the head, so that the ear 200 is covered by the ear pad 50. The ear pad 50 may be made of a flexible material, so as to improve the wearing comfort.

[0127] The electroacoustic transducer and earphone provided in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An electroacoustic transducer, characterized in that: The electroacoustic transducer has a hollow channel extending through the electroacoustic transducer along its own axial direction. The electroacoustic transducer includes a vibration system and a magnetic circuit system. The vibration system includes a diaphragm, a first voice coil and a second voice coil. The diaphragm surrounds the hollow channel. The first voice coil is connected to the diaphragm and surrounds the hollow channel. The second voice coil is connected to the diaphragm and surrounds the outer periphery of the first voice coil. The magnetic circuit system has a magnetic gap, and at least part of the first voice coil and at least part of the second voice coil are located in the magnetic gap; the magnetic circuit system is used to drive the first voice coil and the second voice coil to move so that the diaphragm vibrates and produces sound.

2. The electroacoustic transducer according to claim 1, characterized in that: The diaphragm includes an inner fold ring, a first flat portion, a raised membrane top, a second flat portion and an outer fold ring which are connected in sequence. The inner fold ring surrounds the hollow channel, and the inner fold ring, the raised membrane top and the outer fold ring all bulge outward relative to the same side of the first flat portion. The first voice coil is connected to the first flat portion, and the second voice coil is connected to the second flat portion.

3. The electroacoustic transducer according to claim 2, characterized in that: The ratio of the area of ​​the orthographic projection of the raised membrane top on the first reference plane to the area of ​​the orthographic projection of the entire diaphragm on the first reference plane is between 0.2 and 0.7, wherein the first reference plane is perpendicular to the axial direction of the electroacoustic transducer.

4. The electroacoustic transducer according to claim 2, characterized in that: The raised membrane top is an outwardly raised arc-shaped structure or a plane structure.

5. The electroacoustic transducer according to claim 3, characterized in that: A ratio between an area of ​​an orthographic projection of the outer folding ring on the first reference plane and an area of ​​an orthographic projection of the entire diaphragm on the first reference plane is between 0.2 and 0.

35.

6. The electroacoustic transducer according to claim 3, characterized in that: A ratio between an area of ​​an orthographic projection of the inner fold ring on the first reference plane and an area of ​​an orthographic projection of the entire diaphragm on the first reference plane is between 0.1 and 0.

2.

7. The electroacoustic transducer according to claim 2, characterized in that: The inner fold ring is an arc-shaped structure protruding outward, and / or the outer fold ring is an arc-shaped structure protruding outward.

8. The electroacoustic transducer according to claim 2, characterized in that: The inner fold ring and / or the outer fold ring are provided with a texture structure.

9. The electroacoustic transducer according to claim 2, characterized in that: The inner fold ring, the raised membrane top and the outer fold ring are located on different sides of the first flat portion from the first voice coil and the second voice coil.

10. The electroacoustic transducer according to claim 2, characterized in that: The electroacoustic transducer further comprises a basin frame, wherein the basin frame comprises an annular basin frame inner side wall and an annular basin frame outer side wall, wherein the basin frame inner side wall defines the hollow channel, and the basin frame outer side wall surrounds the basin frame inner side wall; The diaphragm also includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the inner fold ring and surrounds the hollow channel, and the second connecting portion surrounds and is connected to the outer fold ring; the first connecting portion is connected to the inner wall of the basin frame, and the second connecting portion is connected to the outer wall of the basin frame.

11. The electroacoustic transducer according to claim 10, characterized in that: The ratio of the minimum diameter of the inner wall of the basin frame to the maximum diameter of the outer wall of the basin frame is between 0.1 and 0.

5.

12. The electroacoustic transducer according to claim 10, characterized in that: The electroacoustic transducer further includes a first fixing ring and a second fixing ring, wherein the first fixing ring is fixedly connected to the first connecting portion and the inner wall of the basin frame, and the second fixing ring is fixedly connected to the second connecting portion and the outer wall of the basin frame.

13. The electroacoustic transducer according to claim 12, characterized in that: The ratio between the maximum outer diameter of the second fixing ring and the maximum outer diameter of the outer side wall of the basin frame is between 0.7 and 1; And / or, the ratio of the minimum inner diameter of the first fixing ring to the maximum outer diameter of the outer side wall of the basin frame is between 0.1 and 0.

5.

14. The electroacoustic transducer according to claim 10, characterized in that: The magnetic circuit system includes a first magnetic component, which is arranged on the basin frame and surrounds the inner wall of the basin frame. A first magnetic gap and a second magnetic gap are formed between the first magnetic component and the basin frame. The first magnetic gap surrounds the inner wall of the basin frame, and the second magnetic gap surrounds the outer circumference of the first magnetic gap; one end of the first voice coil extends to the first magnetic gap, and one end of the second voice coil extends to the second magnetic gap.

15. The electroacoustic transducer according to claim 10, characterized in that: The magnetic circuit system includes a second magnetic component, a third magnetic component and a fourth magnetic component respectively arranged on the basin frame, the second magnetic component surrounds the inner wall of the basin frame, the third magnetic component surrounds the second magnetic component, and the fourth magnetic component surrounds the third magnetic component. A third magnetic gap is formed between the second magnetic component and the third magnetic component, and a fourth magnetic gap is formed between the third magnetic component and the fourth magnetic component. One end of the first voice coil extends to the third magnetic gap, and one end of the second voice coil extends to the fourth magnetic gap.

16. The electroacoustic transducer according to claim 10, characterized in that: The basin frame is provided with a rear tuning hole, and the rear tuning hole is communicated with the magnetic gap of the magnetic circuit system.

17. The electroacoustic transducer according to any one of claims 1 to 16, characterized in that: The electroacoustic transducer further comprises an opening and closing component, which is disposed in the hollow channel and is used to open or close the hollow channel.

18. An earphone, characterized in that: The earphone comprises a shell and the electroacoustic transducer according to any one of claims 1 to 17, wherein the electroacoustic transducer is arranged in the shell.

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