Open type earphone

Abstract

The utility model discloses an open type earphone. The open earphone comprises a shell and a sound production unit. The shell is provided with an installation cavity and a tone tuning cavity arranged beside the installation cavity, and the shell is provided with a sound outlet hole and an air leakage hole. The sound production unit is arranged in the installation cavity and divides the installation cavity into a front cavity and a rear cavity. Wherein the sound outlet hole is communicated with the front cavity, the air leakage hole is communicated with the tone tuning cavity, an air guide gap is further arranged in the shell and communicated with the rear cavity and the tone tuning cavity, and the flow area formed by the connection portion of the rear cavity and the air guide gap and the flow area formed by the connection portion of the tone tuning cavity and the air guide gap are both larger than the flow area formed by the air guide gap. According to the technical scheme, the low-frequency sound performance of the open type earphone can be improved.

Description

Technical Field

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

[0002] At present, open-type headphone products are attached to the outside of the ear canal, and the earphones do not block the ear canal, which ensures that consumers can listen to the sound of the earphones as well as the sound of the outside world, improving safety and comfort.

[0003] However, the open near-field listening method causes serious loss of the low-frequency part of the sound, and in the related technology, the internal resonance space of the open-type headphones is insufficient, and ideal sound quality cannot be achieved. Utility Model Content

[0004] The embodiment of the present application provides an open-type earphone, which can improve the low-frequency performance of the earphone.

[0005] The open-type earphones proposed in the embodiment of the present application include:

[0006] A housing having an installation cavity and a tuning cavity arranged beside the installation cavity, and the housing having a sound outlet hole and an air leakage hole; and

[0007] A sound generating unit is disposed in the installation cavity and divides the installation cavity into a front cavity and a rear cavity;

[0008] Among them, the sound outlet hole is connected to the front cavity, the air leakage hole is connected to the tuning cavity, and an air guiding gap is also provided in the shell, the air guiding gap is connected to the rear cavity and the tuning cavity, and the flow area formed by the part where the rear cavity is connected with the air guiding gap and the flow area formed by the part where the tuning cavity is connected with the air guiding gap are both larger than the flow area formed by the air guiding gap.

[0009] Based on the above embodiments, in the technical solution of the present application, an installation cavity and a tuning cavity are arranged in the shell of the open earphone, and the shell has a sound outlet and an air vent, and the sound unit divides the installation cavity into a front cavity and a rear cavity, the sound outlet is connected to the front cavity, and the air vent is connected to the tuning cavity. The tuning cavity and the rear cavity are connected through the air guide gap, and the flow area formed by the part adjacent to the rear cavity and the air guide gap and the flow area formed by the part adjacent to the tuning cavity and the air guide gap are both larger than the flow area formed by the air guide gap, so that the air flowing through the air guide gap is compressed. When the sound unit vibrates and sounds, it pushes the air in the rear cavity to vibrate. Since the air vent is connected to the tuning cavity, the air can flow along the path of the rear cavity-air guide gap-tuning cavity, which can make all the air in the rear cavity and the tuning cavity vibrate, increase the vibration mass, and the air is compressed when it flows through the air guide gap, so that the air damping of the vibration of the sound unit is increased, thereby increasing the equivalent air load, thereby reducing the resonance frequency, increasing the low-frequency sound pressure level of the earphone, and improving the low-frequency performance of the open earphone. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0011] Figure 1 This is a schematic structural diagram of an embodiment of an open-type earphone of the present application;

[0012] Figure 2 A schematic cross-sectional view of another embodiment of the open-ear headphone of the present application;

[0013] Figure 3 This is a schematic cross-sectional view of another embodiment of the open-type earphone of the present application;

[0014] Figure 4 This is a schematic cross-sectional view of another embodiment of the open-ear headphones of the present application.

[0015] Description of Figure Numbers:

[0016] 100, open-type earphone; 100a, front end portion; 100b, suspension portion; 100c, rear end portion;

[0017] 10. Shell; 10a. Installation cavity; 10b. Tuning cavity; 10c. Front cavity; 10d. Rear cavity; 10e. Air guide gap; 101. Sound outlet hole; 103. Air leakage hole; 11. Front shell; 111. Front shell body; 113. Front shell sealing cover; 1131. First wall surface; 115. Second sealed cavity; 117. Sound outlet boss; 13. Rear shell; 131. Rear shell body; 133. Rear shell sealing cover; 1331. Second wall surface; 135. First sealed cavity; 15. Partition; 30. Sound unit; 31. Basin; 33. Magnetic body; 35. Vibration assembly; 351. Voice coil; 353. Diaphragm; 50. Object to be sealed.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0020] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0021] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] Currently, open-type earphones are attached to the outside of the ear canal, and the earphones do not block the ear canal, which ensures that consumers can hear the sound of the earphones as well as the sound of the outside world, improving safety and comfort. However, the open-type near-field listening method causes serious loss of the low-frequency part of the sound, and it is impossible to obtain ideal sound quality.

[0024] In order to improve the low-frequency sound performance of the earphone and obtain a better listening effect, the embodiment of the present application proposes an open earphone 100. It can be understood that the open earphone 100 should have at least a wearing state, which is a state in which the open earphone 100 cooperates with the ear of the user so that it can be relatively fixed to the ear. In this state, the user can obtain a relatively ideal listening effect.

[0025] Please refer to Figure 1The open earphone 100 may include a rear end portion 100c, a hanging portion 100b and a front end portion 100a. The front end portion 100a is used to be close to the ear and emit sound, the hanging portion 100b connects the front end portion 100a and the rear end portion 100c, and is used to be hung between the upper side of the ear and the user's head in the wearing state; the rear end portion 100c is arranged at one end of the hanging portion 100b away from the front end portion 100a, and is used to be attached to the back side of the ear and the user's head in the wearing state. The hanging portion 100b is curved in an arc shape, and the hanging portion 100b and the rear end portion 100c are in contact with at least the front and rear sides of the ear to achieve clamping and fixing with the ear, so that the front end portion 100a connected to one end of the hanging portion 100b can be relatively stably arranged on the front side of the ear. It is understandable that the suspension portion 100b and the rear end portion 100c have a certain elasticity so that the user can bend the suspension portion 100b and / or the rear end portion 100c to match the fixed structure with the ear. Exemplarily, the suspension portion 100b is composed of titanium wire, conductive wire and soft silicone, and the rear end portion 100c can be used to set components such as batteries and circuit boards. When the open earphone 100 is worn on the ear, the front end portion 100a covers the ear canal opening of the ear and extends into the ear canal opening of the ear. It is understandable that covering refers to covering in a broad sense, and the position of the front end portion 100a roughly corresponds to the position of the ear canal opening of the ear, but does not extend into the ear canal opening of the ear.

[0026] Optionally, the front end portion 100a, the hanging portion 100b and the rear end portion 100c can be three parts that can be detachably connected, or the front end portion 100a, the hanging portion 100b and the rear end portion 100c can be a whole connected to the shell 10 and are processed and formed together during processing.

[0027] Combined with reference Figure 2 In the embodiment of the present application, the front end portion 100 a of the open earphone 100 includes a housing 10 and a sound unit 30 , and the sound unit 30 is disposed in the housing 10 .

[0028] In the embodiment of the present application, the sound unit 30 includes but is not limited to dynamic speakers, moving iron speakers, Mems (Micro-Electro-Mechanical System) speakers, vibrators, planar speakers and other electro-acoustic conversion devices.

[0029] The internal space of the shell 10 includes an installation cavity 10a, an air guide gap 10e and a tuning cavity 10b. The tuning cavity 10b is located beside the installation cavity 10a, and the tuning cavity 10b is connected to the installation cavity 10a through the air guide gap 10e. The sound-emitting unit 30 is arranged in the installation cavity 10a, and divides the installation cavity 10a into a front cavity 10c and a rear cavity 10d. The shell 10 is also provided with a sound outlet and a pressure relief portion. In the wearing state, the sound outlet is located on the side of the shell 10 facing the user's ear, and the pressure relief portion is located beside the sound outlet, or on the side of the shell 10 away from the user's ear, or on the peripheral side of the shell 10. Specifically, the sound outlet is provided with a sound outlet hole 101 connected to the front cavity 10c for transmitting sound waves. The pressure relief portion is provided with an air leakage hole 103 connected to the tuning cavity 10b, so that the gas in the rear cavity 10d can enter the tuning cavity 10b and be discharged to the external device through the air leakage hole 103, thereby preventing the pressure accumulation in the housing 10. The shape of the air leakage hole 103 and the sound outlet hole 101 can be circular, square or strip, etc., which is not limited in the embodiment of the present application.

[0030] It can be understood that the gas accommodation space at the gas guiding gap 10e is smaller than the gas accommodation space of any of the rear cavity 10d and the tuning cavity 10b, and the flow area formed by the portion A where the rear cavity 10d and the gas guiding gap 10e are connected and the flow area formed by the portion B where the tuning cavity 10b and the gas guiding gap 10e are adjacent are both larger than the flow area formed by the gas guiding gap 10e.

[0031] The flow area refers to the cross-sectional area that the gas can pass through during the flow process on a plane perpendicular to the gas flow direction. Figure 2 In the structural form shown, the gas flows along the path of the rear cavity 10d - the air guide gap 10e - the tuning cavity 10b, and the plane perpendicular to the gas flow direction is a plane parallel to the thickness direction of the housing 10. In the plane parallel to the thickness direction of the housing 10, the width of the air guide gap 10e is smaller than the width of either the rear cavity 10d or the tuning cavity 10b. When the space distribution in other dimensional directions of the housing 10 is uniform, the gas flow area at the air guide gap 10e is the smallest, and the gas accommodation space at the air guide gap 10e is smaller than the gas accommodation space of either the rear cavity 10d or the tuning cavity 10b, and the air is compressed when flowing through the air guide gap 10e.

[0032] When the sound unit 30 vibrates and makes a sound, it pushes the air in the rear cavity 10d to vibrate. Since the air vent 103 is connected to the tuning cavity 10b and is far away from the sound unit 30, the air flows through the air guide gap 10e and the tuning cavity 10b, increasing the volume of the air involved in the vibration, that is, the air mass increases.

[0033] According to the formula:

[0034] Wherein, f0 represents the resonance frequency, and Mm represents the vibration mass. It can be understood that the mass of air participating in the vibration increases, that is, the vibration mass Mm increases, thereby reducing the resonance frequency f0, obtaining a resonance peak at a low frequency, increasing the low-frequency sound pressure level of the earphone, and improving the low-frequency performance of the open earphone 100.

[0035] In addition, the air-guiding gap 10e is regarded as a pipe connecting the installation cavity 10a and the tuning cavity 10b. The flow area formed by the portion A where the rear cavity 10d connects with the air-guiding gap 10e and the flow area formed by the portion B where the tuning cavity 10b connects with the air-guiding gap 10e are both larger than the flow area formed by the air-guiding gap 10e. The air can be compressed when flowing through the air-guiding gap 10e. Due to the end effect of the pipe, the air on both sides of the air-guiding gap 10e will be subject to additional disturbance and pressure gradient, which will increase the equivalent pipe length, thereby increasing the disturbance and oscillation of the air in the installation cavity 10a and the tuning cavity 10b, expanding the scope of influence, and enabling the sound unit 30 to drive all the air in the installation cavity 10a and the tuning cavity 10b to vibrate. The equivalent air load is the air mass or air resistance driven by the diaphragm of the sound unit 30 when it vibrates. It reflects the interaction between the sound unit 30 and the surrounding air. The greater the air resistance, the greater the equivalent air load. In the present application, the air can flow along the path of the rear cavity 10d - the air guide gap 10e - the tuning cavity 10b. The air is compressed when flowing through the air guide gap 10e, thereby increasing the air damping of the vibration, thereby further increasing the equivalent air load of the sound unit 30, reducing the resonance frequency f0, and improving the low-frequency performance.

[0036] Please refer to Figure 2 In one embodiment, in the thickness direction of the shell 10, the air guide gap 10e has a width d1, the mounting cavity 10a has a width d2, and the above d1 and d2 satisfy the relationship d2≥1.2d1. Among them, in the structure where the width of the mounting cavity 10a changes, the width d2 takes the minimum value of the width of the mounting cavity 10a to ensure that the widths of the mounting cavity 10a and the air guide gap 10e satisfy the above relationship. It can be understood that if d2<1.2d1, that is, the width at the air guide gap 10e changes less or remains unchanged compared to the width of the mounting cavity 10a, such as d1=d2. In this case, the air will not be compressed when flowing through the air guide gap 10e. When the sound unit 30 vibrates and sounds, the air in the mounting cavity 10a and the tuning cavity 10b cannot be fully mobilized, the vibration mass is not significantly increased, and the low-frequency performance is not significantly improved. Therefore, in order to fully increase the air load, increase the vibration mass, reduce the resonance frequency and obtain better bass performance, the embodiment of the present application defines d2≥1.2d1. Optionally, d2 can be taken as 1.5d1, 1.6d1, 2d1, 3d1, etc.

[0037] Further, in the thickness direction of the shell 10, the tuning cavity 10b has a width d3, and d1 and d3 satisfy the relationship d3≥1.2d1. In the structure where the width of the tuning cavity 10b changes, the width d3 takes the minimum value of the width of the tuning cavity 10b to ensure that the widths of the tuning cavity 10b and the air guide gap 10e satisfy the above relationship. It can be understood that if d3<1.2d1, that is, the width at the air guide gap 10e changes less or remains unchanged compared to the width of the tuning cavity 10b, such as d1=d3. In this case, the air will not be compressed when flowing through the air guide gap 10e. When the sound unit 30 vibrates and sounds, the tuning cavity 10b and the air in the tuning cavity 10b cannot be fully mobilized, the vibration mass does not increase significantly, and the low-frequency performance is not significantly improved. Therefore, in order to fully increase the vibration mass, reduce the resonance frequency and obtain better bass performance, the embodiment of the present application defines d3≥1.2d1. Optionally, d3 can be taken as 1.5d1, 1.6d1, 2d1, 3d1, etc.

[0038] It can be understood that the width d2 of the installation cavity 10a and the width d3 of the tuning cavity 10b can be the same or different. Since the width d2 and the width d3 are both greater than the width d1, the installation cavity 10a - the air guide gap 10e - the tuning cavity 10b form a cavity structure shaped like an hourglass. The air guide gap 10e is a narrow channel connecting the two chambers. The gas is compressed when flowing through the air guide gap 10e to further fully mobilize the air in the installation cavity 10a and the tuning cavity 10b, increase the air load, reduce the resonance frequency, and further improve the low-frequency sound performance.

[0039] Please refer to Figures 2 to 4 The shell 10 includes a shell body and a partition 15 arranged in the shell body. A space is formed inside the shell body, which is suitable for accommodating and protecting components such as the sound unit 30. The sound outlet hole 101 of the sound outlet part and the air release hole 103 of the pressure relief part are arranged on the shell body. The partition 15 divides the internal space of the shell body into an installation cavity 10a and a tuning cavity 10b. The sound unit 30 is arranged in the installation cavity 10a. Optionally, the sound unit 30 can be connected to the partition 15, that is, the partition 15 is used as a connecting component of the sound unit 30 to make the structure more compact. One end of the partition 15 defines an air guide gap 10e with the shell body, so that the rear cavity 10d is connected with the tuning cavity 10b.

[0040] Please continue to refer to Figure 2 In a specific embodiment, for the convenience of manufacturing and assembly, the shell body includes a front shell 11 and a rear shell 13. The front shell 11 and the rear shell 13 are connected to define the internal space of the shell body. One end of the partition 15 is connected to the front shell 11, and the other end and a part of the inner wall of the rear shell 13 define an air guide gap 10e. The sound outlet 101 is provided on the front shell 11, and the air leakage hole 103 can be provided on at least one of the front shell 11 and the rear shell 13. For example, Figure 2As shown in the figure, the air leakage hole 103 is formed by the front shell 11 and the rear shell 13; of course, in other embodiments, the air leakage hole 103 can also be set in the front shell 11 or the rear shell 13, or when the number of the air leakage holes 103 is multiple, both the front shell 11 and the rear shell 13 can be provided with a plurality of air leakage holes 103.

[0041] In this embodiment, the sound unit 30 is a dynamic speaker, including a basin frame 31, a magnetic body 33 and a vibration assembly 35, and the vibration assembly 35 includes a diaphragm 353 and a voice coil 351. The basin frame 31 has a receiving cavity and an opening connected to the receiving cavity. The magnetic body 33 is arranged in the receiving cavity and defines a magnetic gap with the inner wall of the receiving cavity. The diaphragm 353 covers the opening and is connected to the basin frame 31. The voice coil 351 is located in the receiving cavity and inserted in the magnetic gap, and is connected to the diaphragm 353. When an audio current passes through the voice coil 351, a magnetic field that changes with the audio current is generated. This magnetic field interacts with the magnetic field of the magnetic body 33, causing the voice coil 351 to vibrate, driving the diaphragm 353 to vibrate and produce sound.

[0042] It can be understood that part of the partition 15 extends into the rear cavity 10d, the basin frame 31 can be connected to the partition 15, and the end of the partition 15 away from the front shell 11 is spaced from part of the inner wall of the rear shell 13, thereby defining an air guide gap 10e. Specifically, the diaphragm 353, at least part of the front shell 11 and the partition 15 jointly define the front cavity 10c, and at least part of the front shell 11 includes the part of the front shell 11 opposite to the diaphragm 353, and the sound outlet hole 101 is provided on this part of the front shell 11. The basin frame 31, at least part of the rear shell 13 and the partition 15 define the rear cavity 10d, and at least part of the rear shell 13 includes the part of the rear shell 13 opposite to the basin frame 31. The partition 15, the front shell 11 and the rear shell 13 also jointly define the tuning cavity 10b located on the side of the partition 15 away from the rear cavity 10d.

[0043] Among them, the side edge of the end of the partition 15 away from the front shell 11 is connected to the side walls of the front shell 11 and the rear shell 13, and the end surface of this end is spaced apart from the inner bottom wall of the rear shell 13 to define the air guide gap 10e; it is also possible that the end surface of the end of the partition 15 away from the front shell 11 and part of the side edge are spaced apart from part of the inner wall of the rear shell to define the air guide gap 10e. It can be understood that the gas flow area of ​​the air guide gap 10e formed by the above two methods is smaller than the gas flow area of ​​the rear cavity 10d and the gas flow area adjacent to the tuning cavity 10b and the air guide gap 10e, so as to increase the equivalent air mass participating in the vibration and improve the bass performance.

[0044] In this way, the partition 15 can serve as at least a partial installation base of the sound unit 30, and the partition 15 and the shell body are separated to define the tuning cavity 10b, thereby increasing the air volume and improving the air load when the sound unit 30 vibrates. The partition 15 can effectively separate the rear cavity 10d and the tuning cavity 10b, and a narrow air guide gap 10e is easily formed between the end of the partition 15 and a part of the inner wall of the rear shell 13, so that the rear cavity 10d and the tuning cavity 10b are connected, and the air flowing through the air guide gap 10e can be compressed, which is conducive to mobilizing the vibration of all the air in the rear cavity 10d and the tuning cavity 10b, thereby improving the bass performance.

[0045] Among them, the partition 15 and the front shell 11 are an integral structure, for example, the partition 15 and the front shell 11 are integrally injection molded, with good structural integrity, convenient processing and production, and high production efficiency; or the partition 15 and the front shell 11 and the rear shell 13 can also be connected by gluing, clamping, etc. after being formed separately, and the embodiments of the present application are not limited to this.

[0046] The open earphone 100 also includes components such as a circuit board, a battery, an antenna, charging contacts, and magnetic parts. It is understandable that the above components should not be in contact with water, and the internal space of the housing 10 needs to be connected to the outside through the vent hole 103. In some cases, water may inevitably enter. In order to improve the reliability of the earphone, the above components need to be sealed when they are arranged in the housing 10.

[0047] Please refer to Figures 2 to 4 In one embodiment, the rear shell 13 includes a rear shell body 131 and a rear shell sealing cover 133. The rear shell body 131 is connected to the front shell 11, and the rear shell sealing cover 133 is connected to the rear shell body 131, and defines a first sealed cavity 135 for arranging the object 50 to be sealed with the rear shell body 131. It can be understood that the object 50 to be sealed includes the above-mentioned circuit board, battery, antenna, charging contact, magnetic member and other components.

[0048] At least part of the rear shell sealing cover 133 is used to form the inner wall surface of the tuning cavity 10b. The tuning cavity 10b can be specifically defined by the partition 15 and the rear shell sealing cover 133, or by the partition 15, the rear shell sealing cover 133 and part of the structure of the front shell 11. Figure 2In the embodiment shown, the rear housing sealing cover 133 spans the rear cavity 10d and the tuning cavity 10b, and the partition 15 is spaced apart from the rear housing sealing cover 133 to define an air guide gap 10e. It can be seen that the rear housing sealing cover 133 of this embodiment is not connected to the sound unit 30 to seal the sound unit 30, but cooperates with the rear housing body 131 to seal the object 50 to be sealed. In this way, on the one hand, when water enters the open earphone 100, the water needs to enter the internal space of the shell 10 through the vent hole 103 and other places, and then break through the seal of the rear shell sealing cover 133 before affecting the object to be sealed 50. The water inlet path is more complicated, which makes the object to be sealed 50 safer, which is beneficial to improving the waterproof level and reliability of the open earphone 100; on the other hand, the rear shell sealing cover 133 does not seal the sound unit 30, but specifically seals the object to be sealed 50. The air in the remaining space outside the first sealing cavity 135 can participate in the vibration when the sound unit 30 makes a sound, thereby improving the space utilization rate, increasing the air load, and thus improving the bass performance.

[0049] In addition, during assembly, after the rear shell sealing cover 133, the object to be sealed 50 and the rear shell body 131 are assembled, they are then matched and connected with the front shell 11 and the sound unit 30. That is to say, during the production process, for a specific model of open-type earphones 100, the rear shell sealing cover 133, the rear shell body 131 and the object to be sealed 50 therein can participate in the assembly process as a whole, reducing the difficulty of assembly, reducing the number of assembly steps, and improving production efficiency.

[0050] Furthermore, if Figure 2 As shown, the front shell 11 includes a front shell body 111 and a front shell sealing cover 113. The front shell body 111 is connected to the rear shell body 131, and the sound outlet 101 is arranged on the front shell body 111. The front shell sealing cover 113 is connected to the front shell body 111, and defines a second sealed cavity 115 for setting the object 50 to be sealed with the front shell body 111. Similarly, the object 50 to be sealed includes components such as the above-mentioned circuit board, battery, antenna, charging contacts and magnetic parts. The provision of the front shell sealing cover 113 and the second sealed cavity 115 can fully seal the object 50 to be sealed, further improving the reliability of the open earphone 100. Among them, the partition 15 is connected to the front shell body 111, and the front shell sealing cover 113 is arranged on the side of the partition 15 away from the sound unit 30, so that the front shell sealing cover 113, the rear shell sealing cover 133 and the partition 15 define the above-mentioned tuning cavity 10b.

[0051] It is understandable that the front shell sealing cover 113 and the rear shell sealing cover 133 can be structural members set for the object to be sealed 50; or, the shell of some components can also have a waterproof sealing function, and the shell of the component can also be used as the front shell sealing cover 113 or the rear shell sealing cover 133, and used to form at least part of the wall surface of the tuning cavity 10b. For example, some magnetic parts are not affected by moisture, and the magnetic parts are directly connected to the front shell body 111 or the rear shell body 131, and the surface of the magnetic parts can be used as the front shell sealing cover 113 or the rear shell sealing cover 133.

[0052] Of course, the formation method of the air guide gap 10e is also not limited to the above embodiment. For example, the partition 15 can also connect the front shell 11 and the rear shell 13, and the partition 15 is provided with a through hole, which connects the rear cavity 10d and the tuning cavity 10b, that is, the air guide gap 10e is formed.

[0053] Combined with reference Figure 2 and Figure 3 In some embodiments of the present application, the tuning cavity 10b is located on the side of the mounting cavity 10a around the axial direction of the sound unit 30, which is not only convenient for setting a sealing cover, but also easy to construct and does not affect the thickness of the front end 100a of the open earphone 100.

[0054] Optionally, in some structural forms, the housing 10 is provided with at least two tuning cavities 10b, and the at least two tuning cavities 10b are respectively located on at least two sides of the circumference of the mounting cavity 10a. It can be understood that the housing 10 is also provided with at least two air guide gaps 10e and at least two pressure relief parts, one air guide gap 10e corresponds to a tuning cavity 10b and a rear cavity 10d, and each pressure relief part corresponds to a tuning cavity 10b. Specifically, the housing 10 may include two partitions 15, the two partitions 15 are arranged at intervals, and the internal space of the housing 10 is divided into two tuning cavities 10b and a mounting cavity 10a, each partition 15 is arranged at intervals with the rear shell 13 to form an air guide gap 10e, and the sound unit 30 is connected to the two partitions 15. By providing at least two tuning cavities 10b, the volume of air involved in the vibration can be further increased, and the vibration mass can be increased. Improve the low-frequency sound effect. Furthermore, at least two tuning cavities 10b are symmetrically arranged about the mounting cavity 10a, so that the shape of the open earphone 100 can be symmetrical and beautiful.

[0055] It can be understood that in some other structural forms, the tuning cavity 10b can also be arranged around the installation cavity 10a, and the partition 15 can also be annular, so as to define an annular air guide gap 10e with the shell body. Along the circumference of the installation cavity 10a, the air guide gap 10e can be continuous or intermittent, and this application does not limit this.

[0056] Please refer to Figure 4In some embodiments, along the direction of gas flow from the gas guide gap 10e to the gas leakage hole 103, the gas flow area of ​​the tuning cavity 10b decreases. Figure 4 In the illustrated embodiment, the air leakage holes 103 are arranged on the peripheral side of the housing 10, the air guide gap 10e and the air leakage holes 10e are opposite to each other in a direction perpendicular to the thickness direction of the housing 10, and the direction in which the gas flows from the air guide gap 10e to the air leakage holes 103 is a direction perpendicular to the thickness direction of the housing 10. In this way, the sound waves transmitted toward the air leakage holes 103 are continuously reflected on the path, forming an acoustic black hole, and the wave velocity of the sound waves gradually decreases during this process, thereby reducing the propagation of sound through the air leakage holes 103, reducing the sound leakage of the open-type earphones 100, and improving the user experience.

[0057] For example, in Figure 4 In the example shown, the thickness direction of the shell 10 is substantially the same as the axial direction of the sound unit 30. In the thickness direction of the shell 10, the tuning cavity 10b has a first wall 1131 and a second wall 1331 that are arranged opposite to each other. It can be understood that, in combination with the aforementioned embodiment, the first wall 1131 is at least a portion of the surface of the front shell sealing cover 113, and the second wall 1331 is at least a portion of the surface of the rear shell sealing cover 133. In which, along the direction close to the air leakage hole 103, the distance between the first wall 1131 and the second wall 1331 gradually decreases. In this way, the sound waves in the tuning cavity 10b are constantly reflected by the first wall 1131 and the second wall 1331 during the propagation process close to the air leakage hole 103, so as to achieve the purpose of reducing the sound leakage of the air leakage hole 103.

[0058] Specifically, at least one of the first wall 1131 and the second wall 1331 is tilted. For example, taking the case where the housing 10 is placed horizontally and the thickness direction of the housing 10 is along the vertical direction, one of the first wall 1131 and the second wall 1331 can be horizontally arranged, and the other can be tilted upward or downward toward the air leakage hole 103 in a direction close to the air leakage hole 103, so that the distance between the first wall 1131 and the second wall 1331 gradually decreases in a direction close to the air leakage hole 103; or Figure 4 As shown, the first wall 1131 and the second wall 1331 are both inclined, that is, along the direction close to the air leakage hole 103, the first wall 1131 gradually inclines downward, and the second wall 1331 gradually inclines upward, so that the distance between the first wall 1131 and the second wall 1331 gradually decreases.

[0059] That is, when the open earphone 100 is placed horizontally, at least part of the front shell body 111 and the rear shell body 131 are also arranged horizontally, and at least one of the first wall 1131 and the second wall 1331 has an obtuse angle with the horizontal direction. The angle between the first wall 1131 and the part of the front shell body 111 is β, and the angle between the second wall 1331 and the part of the rear shell body 131 is γ, which satisfies the relationship: 90°<β<180°, 90°<γ<180°. It can be understood that if β or γ is less than or equal to 90 degrees, the first wall 1131 or the second wall 1331 cannot constitute the inner wall of the tuning cavity 10b, and if β or γ is greater than or equal to 90 degrees, it is not easy to construct the above-mentioned structure in which the distance between the first wall 1131 and the second wall 1331 gradually decreases. β and γ can be selected as 120°, 150°, 160°, etc.

[0060] Please refer to Figures 2 to 4 In some embodiments, the pressure relief portion is located on the peripheral side of the shell 10. On the one hand, it is away from the sound unit 30, increasing the air load and improving the bass effect; on the other hand, it is convenient for the sound waves to fully reflect and reduce sound leakage.

[0061] The aperture of the air leakage hole 103 is r, and in the thickness direction of the shell 10, the relationship d2≥1.2r is satisfied. It can be understood that if d2<1.2r, the size of the air leakage hole 103 is too large, which is not only not conducive to maintaining the pressure in the rear cavity 10d and the tuning cavity 10b, making the sound effect poor, but also causing more serious sound leakage due to the excessive size. Therefore, in order to ensure the sound effect and reduce sound leakage, this embodiment limits d2≥1.2r. Optionally, d2 can be 1.8r, 2r, 3r, etc.

[0062] Furthermore, in the thickness direction of the shell 10, the relationship d3≥1.2r is also satisfied, which can further ensure the sound effect and reduce sound leakage. d2 can be 1.8r, 2r, 3r, etc., which will not be repeated here.

[0063] Please refer to Figure 3 and Figure 4In some embodiments, the sound outlet portion includes at least two sound outlet holes 101, and the central axes of at least two sound outlet holes 101 can be arranged in parallel. For consumers with larger ears, when wearing the earphones, it is inevitable that the sound outlet holes 101 move toward the top of the head relative to the external auditory canal, and part of the sound outlet holes 101 may be blocked by the ears, causing the sound heard by the user to become smaller, affecting the user experience. In the embodiment of the present application, at least two sound outlet holes 101 have different orientations. In this way, when one of the sound outlet holes 101 is blocked by the user's ear, at least another sound outlet hole 101 has a different orientation from the blocked sound outlet hole 101 and is not blocked by the user's ear, so that the sound waves can be transmitted from the unblocked sound outlet hole 101 to the user's external auditory canal, ensuring the user's listening effect, improving the robustness of the open earphones 100, making the open earphones 100 more compatible, and different consumers obtain as consistent sound levels as possible.

[0064] Specifically, refer to Figure 4 In a specific embodiment, at least part of the front shell 11 is arched away from the sound unit 30 to form a sound output boss 117, at least one sound output hole 101 is provided on the surface of the sound output boss 117, and at least one sound output hole 101 is provided on the side of the sound output boss 117. It can be understood that the raised sound output boss 117 can make the sound output part closer to the user's external auditory canal, improve the sound pressure level of the sound, and facilitate the user to listen to the sound. Figure 4 As shown, the sound outlet boss 117 may be a truncated cone-shaped protrusion, the sound outlet hole 101 located on the top of the sound outlet boss 117 has a central axis S1, and the sound outlet hole 101 located on the side of the sound outlet boss 117 has a central axis S2. Figure 4 In the embodiment shown, the angle α between the central axis S1 and the central axis S2 is 90 degrees, that is, the two sound holes 101 are arranged at 90 degrees. In this way, when the sound holes 101 on the top of the sound outlet boss 117 are blocked, the sound holes 101 on the side of the sound outlet boss 117 can be kept unblocked to the greatest extent possible, so that the user can hear the sound clearly.

[0065] Of course, the sound outlet boss 117 may also be prism-shaped or cylindrical, and the angle α between the two sound outlet holes 101 is not limited. In addition, the embodiment of the present application does not limit the number of sound outlet holes 101, and the shell 10 may also be provided with three or more sound outlet holes 101. Taking three sound outlet holes 101 as an example, one of the sound outlet holes 101 may be located on the table top of the sound outlet boss 117, and the other two sound outlet holes 101 may be located on the side of the sound outlet boss 117. The axes of the two sound outlet holes 101 located on the side of the sound outlet boss 117 may be parallel or at an angle, which will not be repeated here.

[0066] The sound gain (dB) is obtained by comparing the sound receiving size of a single sound outlet 101 or multiple sound outlets 101 with parallel central axes (working condition 1), and the sound receiving size of at least two sound outlets 101 with the central axes of at least two sound outlets 101 at an angle (working condition 2). The greater the sound gain, the louder the sound that the user can hear under working condition 2 is compared to the sound that the user can hear under working condition 1. The sound data collected by the experiment when the open-type earphone 100 moves upward by 3mm, 6mm, 9mm, and 12mm from the starting position where at least two sound outlets 101 are completely unobstructed are as follows:

[0067] Wearing position Sound gain(dB) 3mm 1.75 6mm 3.3 9mm 5 12mm 5

[0068] Obviously, when the sound outlet 101 is blocked, the second working condition can indeed allow the user to hear louder sound, and the more serious the blockage of the sound outlet 101 is, the greater the sound gain of the second working condition compared with the first working condition. Therefore, the configuration of the embodiment of the present application can reduce the sound loss caused by the misalignment of the open-type earphone 100 and the blocking of part of the sound outlet 101, thereby improving the robustness.

[0069] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0070] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An open-type headphone, characterized in that: include: The housing has a mounting cavity and a tuning cavity arranged beside the mounting cavity, and has a sound outlet hole and an air leakage hole; and A sound generating unit is disposed in the installation cavity and divides the installation cavity into a front cavity and a rear cavity; Among them, the sound outlet hole is connected to the front cavity, the air leakage hole is connected to the tuning cavity, and an air guiding gap is also provided in the shell, the air guiding gap is connected to the rear cavity and the tuning cavity, and the flow area formed by the part where the rear cavity is connected with the air guiding gap and the flow area formed by the part where the tuning cavity is connected with the air guiding gap are both larger than the flow area formed by the air guiding gap.

2. The open earphone according to claim 1, characterized in that The shell comprises a shell body and a partition plate arranged in the shell body, the shell body is provided with the sound outlet hole and the air leakage hole, and the partition plate divides the internal space of the shell body into the installation cavity and the tuning cavity; Wherein, one end of the partition plate and the shell body define the air guide gap.

3. The open earphone according to claim 2, characterized in that The shell body comprises: The front shell is provided with the sound outlet hole; and A rear shell connected to the front shell and defining together an internal space of the shell body; One end of the partition is connected to the front shell, and the other end of the partition away from the front shell and a part of the inner wall of the rear shell together define the air guide gap, and the air leakage hole is provided on at least one of the front shell and the rear shell.

4. The open earphone according to claim 3, characterized in that The rear housing comprises: A rear shell body connected to the front shell; and A rear shell sealing cover connected to the rear shell body and defining a first sealing cavity for arranging an object to be sealed with the rear shell body, wherein the tuning cavity is defined by at least the rear shell sealing cover and the partition; The end of the partition away from the front shell and the rear shell sealing cover or a part of the inner wall of the rear shell body together define the air guide gap.

5. The open earphone according to claim 4, characterized in that The front shell comprises: A front shell body connected to the rear shell body and provided with the sound outlet; and A front shell sealing cover, connected to the front shell body, and defining a second sealing cavity for arranging an object to be sealed with the front shell body; The partition is connected to the front shell body, and the tuning cavity is defined by at least the front shell sealing cover, the rear shell sealing cover and the partition.

6. The open earphone according to claim 1, characterized in that In the thickness direction of the shell, the air guide gap has a width d1, and the mounting cavity has a width d2, satisfying the relationship d2≥1.2d1; and / or, In the thickness direction of the shell, the air guide gap has a width d1, and the tuning cavity has a width d3, satisfying the relationship d3≥1.2d1; and / or, The shell is provided with at least two tuning cavities, and the at least two tuning cavities are respectively located on at least two sides of the installation cavity in a circumferential direction.

7. The open earphone according to claim 1, characterized in that Along the flow direction of the gas from the gas guide gap to the gas leakage hole, the gas flow area of ​​the tuning cavity decreases.

8. The open earphone according to claim 7, characterized in that In the thickness direction of the shell, the tuning cavity has a first wall surface and a second wall surface that are arranged opposite to each other, and the distance between the first wall surface and the second wall surface gradually decreases along the direction approaching the air leakage hole.

9. The open earphone according to claim 7, characterized in that The air leakage hole is located on the peripheral side of the shell; and / or, The diameter of the air leakage hole is r, and in the thickness direction of the shell, the installation cavity has a width d2, satisfying the relationship d2≥1.2r; and / or, The diameter of the air leakage hole is r, and in the thickness direction of the shell, the tuning cavity has a width d3, satisfying the relationship d3≥1.2r.

10. The open earphone according to any one of claims 1 to 9, characterized in that: The shell is provided with at least two sound outlet holes, and the at least two sound outlet holes have at least two different directions.

11. The open earphone according to claim 10, characterized in that At least a portion of the shell structure is arched away from the sound unit to form a sound output boss, at least one sound output hole is arranged on the surface of the sound output boss, and at least one sound output hole is arranged on the side of the sound output boss.

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