Open type earphone

Abstract

The utility model discloses an open type earphone, which comprises an ear hook part and an earphone body which are connected with each other, the earphone body comprises a front cover, a loudspeaker and a rear shell, the loudspeaker is arranged in a cavity enclosed by the front cover and the rear shell, and the loudspeaker divides the cavity into a front cavity and a rear cavity; the front cover is provided with a front sound outlet hole, and the coordinates of the sound outlet end of the front sound outlet hole are located between (14.2 mm,-1.42 mm, 4.63 mm) and (13.7 mm, 7.92 mm, 6.21 mm); the rear shell is provided with a rear sound outlet hole, and the coordinates of the sound outlet end of the rear sound outlet hole are located between (22.02 mm,-2.07 mm and 18.4 mm) and (20.9 mm, 12.47 mm and 12.93 mm); the length of the front sound outlet hole is 8 mm to 11 mm; the length of the rear sound outlet hole is 10 mm to 16 mm; the front sound outlet hole is arranged towards the ear canal, and most sound waves are counteracted by utilizing a reverse sound wave counteracting principle, so that the problem of serious sound leakage of the open type earphone is solved.

Description

Technical Field

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

[0002] With the rise of open-ear headphones in the market, more and more users are choosing open-ear headphones and gradually abandoning in-ear headphones. However, open-ear headphones have a congenital defect, which is that the sound leakage is serious, and people next to you can hear the content in the headphones. Now people pay more and more attention to personal privacy, and this defect is unacceptable. Utility Model Content

[0003] The main purpose of the utility model is to provide an open-type earphone, aiming to solve the problem of serious sound leakage of the open-type earphone.

[0004] To achieve the above-mentioned purpose, the utility model proposes an open earphone, with EEP as the origin of the spatial coordinate system, the outer side of EEP facing the ear is the positive half axis of the Z axis, the front side of EEP facing the ear is the positive half axis of the Y axis, and the upper side of EEP facing the ear is the positive half axis of the X axis. The open earphone includes an ear hook part and an earphone body connected to each other, and the earphone body includes a front cover, a speaker and a rear shell. The speaker is arranged in a cavity surrounded by the front cover and the rear shell, and the speaker divides the cavity into a front cavity and a rear cavity that are independent of each other; the front cover is provided with a front sound hole, and the front sound hole is provided with a front sound hole. The coordinates of the sound outlet end of the hole are between (14.2mm, -1.42mm, 4.63mm) and (13.7mm, 7.92mm, 6.21mm); a rear sound hole is arranged on the rear shell, and the coordinates of the sound outlet end of the rear sound hole are between (22.02mm, -2.07mm, 18.4mm) and (20.9mm, 12.47mm, 12.93mm); the length of the front sound hole is 8mm to 11mm; the length of the rear sound hole is 10mm to 16mm; the front sound hole is used to be arranged toward the ear canal.

[0005] In one embodiment, the sound emission direction of the rear sound outlet is perpendicular to the sound emission direction of the front sound outlet.

[0006] In one embodiment, a microphone pickup hole is further provided on the rear shell, and the coordinates of the microphone pickup hole are (24.17mm, -4.95mm, 9.3mm).

[0007] In one embodiment, the front sound outlet hole is provided with a plurality of first through holes, and the cross-sectional area of ​​the plurality of first through holes is between 35% and 45% of the cross-sectional area of ​​the front sound outlet hole.

[0008] In one embodiment, the rear sound outlet hole is provided with a plurality of second through holes, and the cross-sectional area of ​​the plurality of second through holes is between 35% and 45% of the cross-sectional area of ​​the rear sound outlet hole.

[0009] In one embodiment, the earphone body also includes a printed circuit board, which is arranged in the rear cavity and connected to the rear shell, the outer wall of the printed circuit board is connected to the inner wall of the rear shell, and the printed circuit board divides the rear cavity into a first cavity and a second cavity that are independent of each other, and the rear sound hole is arranged on the cavity wall of the first cavity.

[0010] In one embodiment, the rear shell has a buckle, the printed circuit board has a slot, and the buckle is connected to the slot to connect the rear shell to the printed circuit board.

[0011] In one embodiment, an annular positioning groove is provided on the rear shell, and the annular positioning groove accommodates at least a part of the body of the printed circuit board, so that the annular positioning groove limits the movement of the printed circuit board along the radial direction of the annular positioning groove.

[0012] In one embodiment, the front cover and the speaker form a front cavity, and the rear shell and the speaker form a rear cavity.

[0013] In one embodiment, the speaker includes a speaker body and a bracket, the speaker body is sealedly connected to the bracket, and the bracket is sealedly connected to the wall of the cavity, so that the cavity is divided into a front cavity and a rear cavity that are independent of each other.

[0014] In the embodiment of the utility model, according to the ITU regulations, the EEP is used as the origin of the spatial coordinate system, the outer side of the EEP facing the ear is the positive half axis of the Z axis, the front side of the EEP facing the ear is the positive half axis of the Y axis, and the upper side of the EEP facing the ear is the positive half axis of the X axis, so as to establish a spatial coordinate system, and according to the position and size of the front sound hole and the position and size of the rear sound hole, the reverse sound wave cancellation principle is used to reduce the leakage sound waves, that is, the front sound hole and the rear sound hole respectively emit sound waves with opposite phases but the same frequency and amplitude to achieve sound wave cancellation; the open-type earphone includes an ear hook part and an earphone body that are interconnected, the ear hook part is used to be worn on the user's ear, the earphone body includes a front cover, a speaker and a rear shell, the speaker divides the cavity into a front cavity and a rear cavity that are independent of each other, the front sound hole is located on the front cavity wall, and the rear sound hole is located on the rear cavity wall, and the sound quality of the open-type earphone is adjusted by arranging the front sound hole and the rear sound hole that are isolated from each other, thereby reducing The problem of sound leakage is reduced; specifically, the front sound hole is arranged toward the ear canal, so as to ensure that the front sound hole can face the ear canal when the open-type earphones are normally worn, so that the user can hear the sound, the coordinates of the sound outlet end of the front sound hole are between (14.2mm, -1.42mm, 4.63mm) and (13.7mm, 7.92mm, 6.21mm), and the rear sound hole is arranged on the rear shell, and the coordinates of the sound outlet end of the rear sound hole are between (22.02mm, -2.07mm, 18.4mm) and (20.9mm, 12.47mm, 12.93mm), the length of the front sound hole is 8mm-11mm; the length of the rear sound hole is 10mm-16mm, and the problem of serious sound leakage of the open-type earphones is improved by limiting the coordinate position and length of the front sound hole and limiting the coordinate position and length of the rear sound hole respectively, and utilizing the principle of reverse sound wave cancellation. In the embodiment of the utility model, by setting the coordinate position and length of the front sound outlet and the rear sound outlet, the reverse sound wave cancellation principle is utilized so that the sound leakage of the open-type earphones at 20Hz to 3000Hz can be reduced by 30dB, and most of the sound waves are cancelled, thereby improving the serious sound leakage problem of the open-type earphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of wearing an open-type headset according to an embodiment of the present invention;

[0017] Figure 2It is a structural schematic diagram of an embodiment of the open-type earphone of the utility model;

[0018] Figure 3 It is a first structural schematic diagram of the earphone body of an embodiment of the open-type earphone of the utility model;

[0019] Figure 4 A second structural schematic diagram of the earphone body of an embodiment of the open-type earphone of the utility model;

[0020] Figure 5 This is a cross-sectional view of an earphone body of an embodiment of the open-type earphone of the present invention.

[0021] Description of Figure Numbers:

[0022]

[0023]

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] The main purpose of the utility model is to provide an open-type earphone, aiming to solve the problem of serious sound leakage of the open-type earphone.

[0028] The utility model provides an open-type earphone.

[0029] like Figures 1 to 4As shown, in one embodiment of the utility model, the EEP (Ear canal Entrance Point) is taken as the origin of the space coordinate system, the outer side of the EEP toward the ear 200 is the positive semi-axis of the Z axis, the front side of the EEP toward the ear 200 is the positive semi-axis of the Y axis, and the upper side of the EEP toward the ear 200 is the positive semi-axis of the X axis. The open earphone 100 includes an ear hook part 2 and an earphone body 1 that are connected to each other. The earphone body 1 includes a front cover 11, a speaker 13 and a rear shell 12. The speaker 13 is arranged in a cavity surrounded by the front cover 11 and the rear shell 12, and the speaker 13 divides the cavity into a front cavity 15 and a rear cavity 16 that are independent of each other; the front cover 11 is provided with a front sound hole 111, and the front sound hole 111 is provided with a front sound hole 111. 1, the coordinates of the sound outlet end are between (14.2mm, -1.42mm, 4.63mm) and (13.7mm, 7.92mm, 6.21mm); a rear sound hole 121 is provided on the rear shell 12, and the coordinates of the sound outlet end of the rear sound hole 121 are between (22.02mm, -2.07mm, 18.4mm) and (20.9mm, 12.47mm, 12.93mm); the length of the front sound hole 111 is 8mm to 11mm; the length of the rear sound hole 121 is 10mm to 16mm; the front sound hole 111 is used to be set toward the ear canal.

[0030] In the embodiment of the utility model, according to the provisions of ITU (International Telecommunication Union), the EEP is used as the origin of the spatial coordinate system, the outer side of the EEP toward the ear 200 is the positive half axis of the Z axis, the front side of the EEP toward the ear 200 is the positive half axis of the Y axis, and the upper side of the EEP toward the ear 200 is the positive half axis of the X axis, so as to establish a spatial coordinate system, and according to the position and size of the front sound outlet 111 and the position and size of the rear sound outlet 121, the reverse sound wave cancellation principle is used to reduce the leakage sound wave, that is, the front sound outlet 111 and the rear sound outlet 121 are respectively emitted through the phase The open earphone 100 comprises an ear hook part 2 and an earphone body 1 which are connected to each other. The ear hook part 2 is used to be worn on the ear of the user. The earphone body 1 comprises a front cover 11, a speaker 13 and a rear shell 12. The speaker 13 divides the cavity into a front cavity 15 and a rear cavity 16 which are independent of each other. The front sound outlet 111 is located on the wall of the front cavity 15, and the rear sound outlet 121 is located on the wall of the rear cavity 16. The open earphone 100 comprises an ear hook part 2 and an earphone body 1 which are connected to each other. The ear hook part 2 is used to be worn on the ear of the user. The earphone body 1 comprises a front cover 11, a speaker 13 and a rear shell 12. The speaker 13 divides the cavity into a front cavity 15 and a rear cavity 16 which are independent of each other. The front sound outlet 111 and the rear sound outlet 121 are ... Specifically, the front sound hole 111 is arranged toward the ear canal, so as to ensure that the front sound hole 111 can face the ear canal when the open earphone 100 is normally worn, so that the user can hear the sound. The coordinates of the sound outlet end of the front sound hole 111 are between (14.2mm, -1.42mm, 4.63mm) and (13.7mm, 7.92mm, 6.21mm). The rear shell 12 is provided with a rear sound hole 121. The coordinates of the sound outlet end of the rear sound hole 121 are between (14.2mm, -1.42mm, 4.63mm) and (13.7mm, 7.92mm, 6.21mm). The mark is located between (22.02mm, -2.07mm, 18.4mm) and (20.9mm, 12.47mm, 12.93mm), the length of the front sound hole 111 is 8mm to 11mm; the length of the rear sound hole 121 is 10mm to 16mm, and the problem of serious sound leakage of the open earphone 100 is improved by limiting the coordinate position and length of the front sound hole 111 and limiting the coordinate position and length of the rear sound hole 121 respectively and utilizing the principle of reverse sound wave cancellation.

[0031] The technical solution of the utility model sets the coordinates of the sound outlet end of the front sound hole 111 to be between (14.2mm, -1.42mm, 4.63mm) and (13.7mm, 7.92mm, 6.21mm), and the coordinates of the sound outlet end of the rear sound hole 121 to be between (22.02mm, -2.07mm, 18.4mm) and (20.9mm, 12.47mm, 12.93mm), the length of the front sound hole 111 is 8mm-11mm, and the length of the rear sound hole 121 is 10mm-16mm, and the coordinate positions and lengths of the front sound hole 111 and the rear sound hole 121 are restricted respectively, and the principle of reverse sound wave cancellation is used to reduce the sound leakage of the open earphone 100 at 20Hz-3000Hz by 30dB, so that most of the sound waves are cancelled, thereby improving the problem of serious sound leakage of the open earphone 100.

[0032] like Figure 3 As shown, in one embodiment, the sound emission direction of the rear sound hole 121 is perpendicular to the sound emission direction of the front sound hole 111 ; in order to further reduce sound leakage, the sound emission direction of the rear sound hole 121 needs to be perpendicular to the sound emission direction of the front sound hole 111 .

[0033] like Figure 2 As shown, in one embodiment, a microphone pickup hole 17 is further provided on the back shell 12, and the coordinates of the microphone pickup hole 17 are (24.17mm, -4.95mm, 9.3mm); in the existing earphones, the microphone pickup hole 17 is close to the speaker 13, and the microphone pickup hole 17 can easily pick up the sound emitted by the speaker 13, thereby causing the problem of echo leakage; in this embodiment, by setting the coordinate position of the microphone pickup hole 17, the reverse sound wave cancellation principle is utilized, and phase cancellation is achieved by emitting sound waves with opposite phases to the noise but the same frequency and amplitude as the noise to interfere with the noise; the coordinates of the microphone pickup hole 17 are (24.17mm, -4.95mm, 9.3mm), so that the position of the microphone pickup hole 17 can be as close to the user's mouth as possible to pick up the user's speaking sound, and at the same time, the microphone pickup hole 17 can pick up the sound emitted by the speaker 13 to a minimum, thereby solving the problem of echo leakage.

[0034] like Figure 4As shown, in one embodiment, the front sound hole 111 is provided with a plurality of first through holes 1111, and the cross-sectional area of ​​the plurality of first through holes 1111 is between 35% and 45% of the cross-sectional area of ​​the front sound hole 111; by providing the plurality of first through holes 1111, the air outlet of the front sound hole 111 can be controlled, so that the sound leakage of the open earphone 100 at 20Hz to 3000Hz can be reduced by 30dB, and the overall structure of the open earphone 100 can be made more beautiful; and the shapes of the plurality of first through holes 1111 can be circular, elliptical, runway-shaped or other shapes, or a combination of two or more thereof. In the present embodiment, the shapes of the plurality of first through holes 1111 are all elliptical, and the plurality of ellipses are arranged at intervals and evenly distributed.

[0035] In one embodiment, the rear sound outlet hole 121 is provided with a plurality of second through holes 1211, and the cross-sectional area of ​​the plurality of second through holes 1211 is between 35% and 45% of the cross-sectional area of ​​the rear sound outlet hole 121; by providing the plurality of second through holes 1211, the air outlet volume of the rear sound outlet hole 121 can be controlled, so that the sound leakage of the open earphone 100 at 20Hz to 3000Hz can be reduced by 30dB, and the overall structure of the open earphone 100 can be made more beautiful; and the shapes of the plurality of second through holes 1211 can be circular, elliptical, runway-shaped or one or a combination of two or more thereof. In the present embodiment, the shape of the plurality of second through holes 1211 is a combination of circular and elliptical, that is, the circular and elliptical shapes are arranged at intervals and evenly distributed.

[0036] like Figure 5 As shown, in one embodiment, the earphone body 1 also includes a printed circuit board 14, which is arranged in the rear cavity 16 and connected to the rear shell 12, the outer wall of the printed circuit board 14 is connected to the inner wall of the rear shell 12, the printed circuit board 14 divides the rear cavity 16 into a first cavity 161 and a second cavity 162 that are independent of each other, and the rear sound hole 121 is arranged on the cavity wall of the first cavity 161; the printed circuit board 14 is used to transmit electrical signals, the outer wall of the printed circuit board 14 is connected to the inner wall of the rear shell 12, so that the rear shell 12, the printed circuit board 14 and the speaker 13 are enclosed to form the first cavity 161, and the rear shell 12 and the printed circuit board 14 are enclosed to form the second cavity 162, the rear sound hole 121 is arranged on the cavity wall of the first cavity 161, the printed circuit board 14 reduces the space for the airflow entering from the rear sound hole 121, so that the airflow only flows in the first cavity 161, but not in the second cavity 162, which is more conducive to improving the sound leakage problem of the open earphone 100.

[0037] In one embodiment, the rear shell 12 has a buckle 122, and the printed circuit board 14 has a slot (not marked), and the buckle 122 is connected to the slot to connect the rear shell 12 to the printed circuit board 14; specifically, the rear shell 12 has a buckle 122, and the printed circuit board 14 has a slot at a corresponding position, and the rear shell 12 is connected to the printed circuit board 14 by inserting the buckle 122 into the slot, and in this embodiment, in order to ensure structural stability, the number of buckles 122 is two, and the number of slots is also two, and the two buckles 122 are arranged and connected to the two slots in a one-to-one correspondence to ensure a firm connection between the rear shell 12 and the printed circuit board 14.

[0038] In one embodiment, an annular positioning groove 123 is provided on the rear shell.

[0039] In one embodiment, an annular positioning groove 123 is provided on the rear shell 12, and the annular positioning groove 123 accommodates at least a part of the body of the printed circuit board 14, so that the annular positioning groove 123 limits the movement of the printed circuit board 14 along the radial direction of the annular positioning groove 123; in order to limit the radial movement of the printed circuit board 14 and ensure that the first cavity 161 and the second cavity 162 are independent of each other, the rear shell 12 is provided with an annular positioning groove 123, and the annular positioning groove 123 accommodates at least a part of the body of the printed circuit board 14. Specifically, the annular positioning groove 123 and the printed circuit board 14 can be connected by glue, so that the printed circuit board 14 and one side of the printed circuit board 14 are enclosed to form the second cavity 162, and the rear shell 12, the speaker 13 and the other side of the printed circuit board 14 are enclosed to form the first cavity 161.

[0040] In one embodiment, a front cavity 15 is formed between the front cover 11 and the speaker 13, and a rear cavity 16 is formed between the rear shell 12 and the speaker 13; the front sound hole 111 is located on the wall of the front cavity 15, and the rear sound hole 121 is located on the wall of the rear cavity 16. When the speaker 13 receives an electrical signal, it vibrates up and down to cause sound to be emitted from the front sound hole 111 of the front cavity 15, and the airflow entering the rear cavity 16 from the rear sound hole 121 is used to cancel the sound waves, thereby improving the problem of severe sound leakage of the open earphone 100.

[0041] In one embodiment, the speaker 13 includes a speaker body 131 and a bracket 132, the speaker body 131 is sealedly connected to the bracket 132, and the bracket 132 is sealedly connected to the wall of the cavity, so that the cavity is divided into a front cavity 15 and a rear cavity 16 that are independent of each other; specifically, the front cover 11 and the rear shell 12 are enclosed to form a cavity, the bracket 132 is a circular ring structure, the outer ring of the bracket 132 is sealedly connected to the wall of the cavity, the inner ring of the bracket 132 is sealedly connected to the speaker body 131, and the bracket 132 is used to support the speaker body 131, so that the speaker 13 divides the cavity into a front cavity 15 and a rear cavity 16 that are independent of each other, and in this embodiment, the sealing connection method can be glue connection.

[0042] According to one embodiment of the utility model, one end of the outer circle of the bracket 132 is sealed to the rear shell 12, the other end of the outer circle of the bracket 132 is sealed to the front cover 11, and the inner circle of the bracket 132 is sealed to the speaker body 131, so that the speaker 13 divides the cavity into a front cavity 15 and a rear cavity 16 which are independent of each other.

[0043] According to another embodiment of the present invention, the outer ring of the bracket 132 is sealed to the rear shell 12 , and the inner ring of the bracket 132 is sealed to the speaker body 131 , so that the speaker 13 divides the cavity into a front cavity 15 and a rear cavity 16 that are independent of each other.

[0044] According to another embodiment of the present invention, the outer ring of the bracket 132 is sealed to the front cover 11 , and the inner ring of the bracket 132 is sealed to the speaker body 131 , so that the speaker 13 divides the cavity into a front cavity 15 and a rear cavity 16 that are independent of each other.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An open earphone, with the EEP as the origin of the spatial coordinate system, the outer side of the EEP facing the ear as the positive half axis of the Z axis, the front side of the EEP facing the ear as the positive half axis of the Y axis, and the upper side of the EEP facing the ear as the positive half axis of the X axis, characterized in that: The open earphone comprises an ear hook part and an earphone body which are connected to each other. The earphone body comprises a front cover, a speaker and a rear shell. The speaker is arranged in a cavity surrounded by the front cover and the rear shell, and the speaker divides the cavity into a front cavity and a rear cavity which are independent of each other. A front sound hole is arranged on the front cover, and the coordinates of the sound outlet end of the front sound hole are between (14.2mm, -1.42mm, 4.63mm) and (13.7mm, 7.92mm, 6.21mm). A rear sound hole is arranged on the rear shell, and the coordinates of the sound outlet end of the rear sound hole are between (22.02mm, -2.07mm, 18.4mm) and (20.9mm, 12.47mm, 12.93mm). The length of the front sound hole is 8mm to 11mm. The length of the rear sound hole is 10mm to 16mm. The front sound hole is used to be arranged toward the ear canal.

2. The open earphone according to claim 1, characterized in that The sound emitting direction of the rear sound emitting hole is arranged perpendicular to the sound emitting direction of the front sound emitting hole.

3. The open earphone according to claim 1, characterized in that The rear shell is also provided with a microphone pickup hole, and the coordinates of the microphone pickup hole are (24.17mm, -4.95mm, 9.3mm).

4. The open earphone according to any one of claims 1 to 3, characterized in that: The front sound outlet hole is provided with a plurality of first through holes, and the cross-sectional area of ​​the plurality of first through holes is between 35% and 45% of the cross-sectional area of ​​the front sound outlet hole.

5. The open earphone according to any one of claims 1 to 3, characterized in that: The rear sound outlet hole is provided with a plurality of second through holes, and the cross-sectional area of ​​the plurality of second through holes is between 35% and 45% of the cross-sectional area of ​​the rear sound outlet hole.

6. The open earphone according to any one of claims 1 to 3, characterized in that: The earphone body also includes a printed circuit board, which is arranged in the rear cavity and connected to the rear shell. The outer wall of the printed circuit board is connected to the inner wall of the rear shell. The printed circuit board divides the rear cavity into a first cavity and a second cavity that are independent of each other. The rear sound hole is arranged on the cavity wall of the first cavity.

7. The open earphone according to claim 6, characterized in that The rear shell has a buckle, the printed circuit board has a slot, and the buckle is connected to the slot to connect the rear shell to the printed circuit board.

8. The open earphone according to claim 7, characterized in that The rear shell is provided with an annular positioning groove, and the annular positioning groove accommodates at least a part of the body of the printed circuit board, so that the annular positioning groove limits the movement of the printed circuit board along the radial direction of the annular positioning groove.

9. The open earphone according to any one of claims 1 to 3, characterized in that: The front cover and the speaker form a front cavity, and the rear shell and the speaker form a rear cavity.

10. The open earphone according to any one of claims 1 to 3, characterized in that: The speaker comprises a speaker body and a bracket, wherein the speaker body is sealedly connected to the bracket, and the bracket is sealedly connected to the wall of the cavity, so that the cavity is divided into a front cavity and a rear cavity which are independent of each other.

Images