WO2019148392A1

WO2019148392A1 - Open-type air conduction earpiece

Info

Publication number: WO2019148392A1
Application number: PCT/CN2018/074815
Authority: WO
Inventors: 牛浩田; 冷虎; 王刚; 王晓虎
Original assignee: 高驰运动科技(深圳)有限公司
Priority date: 2018-01-31
Filing date: 2018-01-31
Publication date: 2019-08-08
Also published as: CN110679156B; CN110679156A

Abstract

An open-type air conduction earpiece, relating to the technical field of earpieces, and comprising a housing (2-1, 2-3, 2-7) and a sound-emitting unit (2-4) arranged within the housing (2-1, 2-3, 2-7), the sound-emitting unit (2-4) dividing the space inside the housing (2-1, 2-3, 2-7) into a front cavity and a rear cavity, a sound-emitting portion of the sound-emitting unit (2-4) facing towards the front cavity, the housing (2-1, 2-3, 2-7) being provided with a sound-guiding tube (2-6), one end of the sound-guiding tube (2-6) being in communication with the front cavity, the other end of the sound-guiding tube (2-6) being in communication with the external environment, so that the earpiece need not be plugged into an ear during use, thereby reducing damage to the ear.

Description

Open air conduction earphone

Technical field

The present invention relates to the field of earphone technology, and in particular to an open air conduction earphone.

Background technique

The current air conduction earphones are all airtight. Usually, a long catheter is used to connect the earplugs. The earplugs are inserted into the user's ears, and the sounding unit in the earplugs is used to push the air vibration, thereby causing the ear's eardrum to vibrate and the wearer to generate Hearing.

technical problem

Such earphones are prone to earache when worn for a long time, causing damage to the eardrum, which may affect hearing over time.

Technical solution

It is an object of the present invention to provide an open air conduction earphone that does not need to be inserted into the ear during use to reduce damage to the ear.

In order to achieve the above object, the technical solution of the present invention is: an open air conduction earphone comprising a housing and a sounding unit disposed in the housing, the sounding unit separating the inner space of the housing into the front cavity and the rear cavity, and the sounding unit The sounding portion faces the front cavity, and the casing is provided with a sound guiding tube. One end of the sound guiding tube communicates with the front cavity, and the other end of the sound guiding tube communicates with the outside.

Further, the sound guiding tube comprises a soft rubber tube, and the soft rubber tube is internally provided with a fixed strip along the longitudinal direction thereof, and the shaped strip can be bent and shaped to be used for bending and shaping the soft rubber tube together.

The sound guiding tube comprises a soft rubber tube, and the outer portion of the soft rubber tube is sleeved with a certain shape tube, and the shaped tube can be bent and shaped at any time, so that the soft rubber tube is bent and shaped together.

The housing comprises a fixed housing and a movable housing rotatably coupled to the fixed housing, one end of the sound guiding tube is connected to the movable housing, and the movable housing rotates relative to the fixed housing to drive the sound guiding tube to rotate together .

The fixed housing is provided with a sound outlet communicating with the front cavity, and the movable housing is provided with a sound hole, one end of the sound tube is connected with the sound hole, and the movable shell is opposite to the fixed shell. The sound hole is always corresponding to the sound outlet during the rotation.

The fixing housing is provided with a limiting slot, and the movable housing is provided with a limiting block, and the limiting block is slidably disposed in the limiting slot to limit the rotation range of the movable housing.

A positioning member is disposed between the fixed housing and the movable housing, and the positioning member is configured to fix the position of the movable housing when the movable housing is rotated to a specific position relative to the fixed housing.

The fixing housing is provided with a plurality of positioning slots, and the movable housing is provided with a positioning block. During the rotation of the movable housing relative to the fixed housing, the positioning block is rotated into different positioning slots to fix the movable housing to different Turn the position.

The fixed housing has a first circumferential side wall, the movable housing has a second circumferential side wall, and the second circumferential side wall of the movable housing is rotatably disposed outside the first circumferential side wall of the fixed housing, the sound The port is disposed on the first circumferential side wall, and the sound hole is disposed on the second circumferential side wall.

The movable housing is rotatably connected to the fixed housing through a connecting shaft, and a sealing ring is sleeved on the connecting shaft to seal the gap between the connecting shaft and the shaft hole provided on the fixed housing.

Beneficial effect

The invention provides a sound guiding tube on the earphone casing to conduct the sound of the earphone, and when the user wears the earphone, the sounding end of the sound guiding tube is placed outside the ear of the user corresponding to the position of the cochlea, Can guarantee the sound quality and volume of the headphones. The earphone does not need to be inserted into the user's ear, so it does not cause damage to the eardrum.

DRAWINGS

1 is an exploded view of a first angle of view of an earphone of Embodiment 1;

2 is an exploded view of a second angle of view of the earphone of the embodiment;

3 is a schematic structural view of a face cover of an earphone according to Embodiment 1;

4 is a schematic structural view of a top cover of an earphone according to Embodiment 1;

5 is a schematic overall structural view of an earphone according to Embodiment 1;

6 is a first perspective exploded view of the earphone of the second embodiment;

7 is a second perspective exploded view of the earphone of the second embodiment;

8 is a schematic structural view showing a structure of a protruding portion and a limiting slot of the sound emitting connecting portion of the earphone according to the second embodiment;

9 is a schematic overall structural view of an earphone of Embodiment 2;

Figure 10 is an exploded view of the earphone of the third embodiment;

11 is a schematic overall structural view of a third embodiment of the earphone;

Embodiments of the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

As shown in FIGS. 1 to 5, an open air conduction earphone includes a housing and a sounding unit disposed in the housing, and the sounding unit divides the inner space of the housing into a front cavity and a rear cavity, and the sounding unit of the sounding unit faces In the front cavity, a sound guiding tube 1-9 is disposed on the housing, one end of the sound guiding tube 1-9 is in communication with the front cavity, and the other end of the sound guiding tube 1-9 is in communication with the outside.

Specifically, the sounding unit adopts a speaker 1-5, and the casing includes a top cover 1-1, a cover 1-3, and a bottom cover 1-6, and the bottom cover 1-6 and the cover 1-3 are both ends. a closed cylindrical structure, the open ends of the bottom cover 1-6 and the cover 1-3 are oppositely connected, and the horn 1-5 is disposed between the bottom cover 1-6 and the cover 1-3 In the cavity, the sounded side of the horn 1-5 faces the closed end of the face cover 1-3, and the horn 1-5 divides the cavity into two chambers, and the chamber facing the sound emitting surface of the horn 1-5 is the front cavity. The other chamber is the back cavity. Wherein, the circumferential end surface of the open end of the bottom cover 1-6 is provided with an annular step, and the periphery of the horn 1-5 is placed on the annular step, and is glued to the annular step by a dispensing process; the bottom cover 1 An annular card slot is further disposed on the circumferential end surface of the open end of the cover end. The circumferential end surface of the open end of the cover cover 1-3 is engaged in the annular card slot, and is glued into the annular card slot by a dispensing process.

The top cover 1-1 is rotated on the outer side surface of the end plate of the closed end of the cover 1-3, and the bottom surface of the top cover 1-1 is provided with a connecting shaft 1-104, and the center of the end plate of the closed end of the cover 1-3 A shaft hole 1-302 is provided through which the connecting shaft 1-104 passes, and the connecting shaft 1-104 passes through the shaft hole and is caught in the end plate of the closed end of the cover 1-3 through a snap ring. On the side. Wherein, the connecting shaft 1-104 is provided with a sealing groove 1-041 and a card slot 1-102, and the sealing groove 1-041 is sleeved with a sealing ring 1-2 for connecting the connecting shaft 1-104 and the shaft hole 1 A gap seal between -302 is provided, and the snap ring 1-4 is disposed in the slot 1-1042 to fix the connecting shaft 1-104 to the end plate of the cover 1-3. The rotational connection of the top cover 1-1 to the face cover 1-3 is achieved by the connecting shaft 1-104.

The end plate of the closed end of the cover 1-3 is provided with a circular arc-shaped strip hole, that is, the sound outlet 1-003, and the top cover 1-1 is provided with a circular hole, that is, the sound hole 1 -105. In order to make the top cover 1-1 rotate during the rotation of the opposite cover 1-3, the circular hole always corresponds to the circular arc-shaped hole, that is, the circular hole does not exceed the range of the circular arc-shaped hole, the surface The outer side surface of the end plate of the closed end of the cover 1-3 is provided with a limiting slot 1-304, and the bottom surface of the top cover 1-1 is provided with a limiting block 1-103, and the limiting block 1-103 is slidably disposed in the limiting slot 1 -304, during the rotation of the top cover 1-1 opposite the cover 1-3, the limiting block 1-103 slides in the limiting slot 1-304, when sliding to the limit position at both ends of the limiting slot 1-304 The top cover 1-1 cannot continue to rotate. At this time, it should be ensured that the circular hole is in the range of the arc-shaped strip-shaped hole, that is, the top cover 1-1 is rotated back to the opposite limit with respect to the cover 1-3. In the position, the sound hole 1-105 on the top cover 1-1 still corresponds to the sound outlet 1-303 on the end cover 1-3 end plate. Wherein, the circumferential edge of the outer side surface of the end cover 1-3 is protruded from the central portion of the end plate, and the limiting groove 1-304 can be disposed along the circumferential edge of the outer side of the cover 1-3, the limit The slots 1-304 are set to two, and the two are oppositely arranged. The number of the limiting blocks 1-103 is consistent with the number of the limiting slots 1-304.

The first film 1-8 is adhered to the inner surface of the end plate of the top cover 1-3 corresponding to the sound port 1-303, and the film may be a gas permeable waterproof film. a plurality of vent holes 1-602 are disposed on the circumferential side wall of the bottom cover 1-6, and a second film 1-7 is attached to the inner side surface of the circumferential side wall of the bottom cover 1-6 corresponding to the vent hole 1-602. The film can be made of a breathable waterproof film.

In order to rotate the top cover 1-1 during the rotation of the opposite cover 1-3, the top cover 1-1 can be fixed in a specific position (the position between the two extreme positions), the end of the cover 1-3 A plurality of positioning slots 1-301 are disposed on the outer side of the board, and the number of the positioning slots 1-301 can be set as needed. Accordingly, a positioning block 1-102 is disposed on the bottom surface of the top cover 1-1. 1 During the rotation of the opposite cover 1-3, the positioning block 1-102 is rotated into the different positioning slots 1-301 to fix the top cover 1-1 at different rotational positions. Each of the positioning slots 1-301 is spaced apart from the rotation trajectory of the positioning block 1-102, and the shape of each positioning slot 1-301 can be a circular arc shape. Accordingly, the shape of the positioning block 1-102 is also a circle. The arc shape facilitates the positioning of the block 1-102 into the positioning slot 1-301 during the rotation of the top cover 1-1.

The top surface of the top cover 1-1 is provided with an sounding connecting portion 1-101 at the circular hole (ie, the sound emitting hole 1-105), and the sounding connecting portion 1-101 has the inside and the a sounding passage communicating with the circular holes, one end of the sound guiding tube 1-9 is connected to the sounding connecting portion 1-101, and the sound of the channel inside the sound guiding tube 1-9 and the sounding connecting portion 1-101 The channels are connected, and the other end of the sound guiding tube 1-9 is the sound emitting end of the earphone, and the sounding end of the sound guiding tube 1-9 is adjusted to the position corresponding to the cochlea outside the user's ear during use. The sound guiding tube 1-9 is a soft rubber tube which is tightly sleeved at the end of the sounding connecting portion 1-101 and can be removed and replaced. An earring 1-601 is provided on the outer circumferential side wall of the bottom cover 1-6 for attaching the earphone to the user's ear.

In this embodiment, the sound guiding tube 1-9 is connected to the top cover 1-1, and the rotation of the top cover 1-1 relative to the surface cover 1-3 can drive the sound guiding tube 1-9 to rotate, thereby realizing the sound guiding tube The position of the sound end of 1-9 is adjusted to meet the needs of different users.

Embodiment 2

As shown in FIGS. 6-9, an open air conduction earphone includes a housing and a sounding unit disposed in the housing, and the sounding unit divides the inner space of the housing into a front cavity and a rear cavity, and the sounding unit of the sounding unit faces In the front cavity, a sound guiding tube 2-6 is disposed on the housing, one end of the sound guiding tube 2-6 is in communication with the front cavity, and the other end of the sound guiding tube 2-6 is in communication with the outside.

Specifically, the sounding unit adopts a speaker 2-4, and the casing includes a cover 2-1, a middle frame 2-3, and a bottom cover 2-7, and the bottom cover 2-7 and the cover 2-1 are both ends. a closed cylindrical structure, the open ends of the bottom cover 2-7 and the cover 2-1 are oppositely connected, and the horn 2-4 is disposed between the bottom cover 2-7 and the cover 2-1. In the cavity, the sounding side of the horn 2-4 faces the closed end of the face cover 2-1, and the horn 2-4 divides the cavity into two chambers, and the chamber facing the sound emitting surface of the horn 2-4 is the front cavity. The other chamber is the back cavity. Wherein, the circumferential end surface of the open end of the bottom cover 2-7 is provided with a first annular step, and the periphery of the horn 2-4 is placed on the first annular step, and is glued to the first annular step by a dispensing process. a second annular step is further disposed on the circumferential end surface of the open end of the bottom cover 2-7, and the circumferential end surface of the open end of the cover 2-1 is placed on the second annular step, and is glued to the second through the dispensing process. On the ring steps.

The peripheral edge of the panel at the closed end of the cover 2-1 is protruded from the circumferential outer sidewall of the cover 2-1, and the middle frame 2-3 includes a cylindrical collar, and the middle frame 2-3 is sleeved on On the outer circumferential side wall of the cover 2-1, the middle frame 2-3 is located between the peripheral edge of the panel of the cover 2-1 and the circumferential end of the open end of the bottom cover 2-7, and the middle frame 2-3 can be in the cover 2 - The outer side wall of the circumference of 1 rotates.

The circular side wall of the cover 2-1 is provided with a circular arc-shaped hole in the circumferential direction thereof, that is, the sound outlet 2-101, and a circular shape is formed on the circumferential side wall of the middle frame 2-3. The hole is the sound hole 2-303, and the outer side surface of the circumferential side wall of the middle frame 2-3 is provided with the sounding connecting portion 2-301 corresponding to the circular hole (ie, the sound hole 2-303). The sounding connection portion 2-301 has an sounding passage communicating with the circular hole therein, and the sounding connecting portion 2-301 is for discharging the one end of the sound guiding tube 2-6 and the middle frame 2-3 The sound hole 2-303 is connected. The other structure of the sound guiding tube 2-6 is the same as that of the first embodiment.

In order to make the middle frame 2-3 rotate during the rotation of the opposite cover 2-1, the circular hole always corresponds to the circular arc-shaped hole, that is, the circular hole does not exceed the range of the circular arc-shaped hole, the out The sound connecting portion 2-301 has a first protruding portion 2-3011 which is protruded from the upper end surface of the middle frame 2-3, and correspondingly, on the panel of the face cover 2-1 The first limiting slot 2-103 is disposed, and the first protruding portion 2-3011 is located in the first limiting slot 2-103. During the rotation of the opposite cover 2-1 of the middle frame 2-3, the first The protruding portion 2-3011 slides in the first limiting slot 2-103. When sliding to the extreme position at both ends of the first limiting slot 2-103, the middle frame 2-3 cannot continue to rotate. The circular hole is in the range of the arc-shaped strip-shaped hole, that is, when the middle frame 2-3 is rotated back to the two extreme positions with respect to the face cover 2-1, the sound hole 2 on the middle frame 2-3 -303 still corresponds to the sound outlet 2-101 on the circumferential side wall of the face cover 2-1. Alternatively, the sound output connecting portion 2-301 has a second protruding portion which is protruded from the lower end surface of the middle frame 2-3, and correspondingly, on the circumferential side of the open end of the bottom cover 2-7 a second limiting slot (not labeled in the figure) is disposed on the wall, and the second protruding portion is located in the second limiting slot, and the second convex portion is rotated during the rotation of the opposite cover 2-1 of the middle frame 2-3 The outlet portion slides in the second limiting slot, and the second protruding portion and the second limiting slot also function to limit the rotational limit position of the middle frame 2-3. In order to improve the limit effect of the center frame 2-3, it is preferable to set both limit slots.

In order to make the middle frame 2-3 rotate during the rotation of the opposite cover 2-1, the middle frame 2-3 can be fixed at a specific position (a position between the two extreme positions), the circumference of the cover 2-1 A plurality of positioning grooves 2-102 are disposed on the outer side surface of the side wall, and the number of the positioning grooves 2-102 can be set as needed. Accordingly, a positioning block 2-302 is disposed on the inner side surface of the circumferential side wall of the middle frame 2-3. During the rotation of the middle frame 2-3 relative to the cover 2-1, the positioning block 2-302 is rotated into the different positioning slots 2-102 to fix the middle frame 2-3 at different rotational positions. Each of the positioning slots 2-102 is a strip-shaped slot, which is disposed parallel to the axis of the cover 2-1, and the cross-sectional shape of each of the positioning slots 2-102 is curved. Accordingly, the positioning block 2-302 has the best shape. It is also strip-shaped and has a curved cross section, so that the positioning block 2-302 slides into the positioning groove 2-102 during the rotation of the middle frame 2-3.

A first film 2-2 is adhered to a position on the inner side surface of the circumferential side wall of the face cover 2-1 corresponding to the sound port 2-101, and the film may be a gas permeable waterproof film. a plurality of vent holes 2-701 are disposed on the circumferential side wall of the bottom cover 2-7, and a second film 2-5 is adhered to the inner side surface of the circumferential side wall of the bottom cover 2-7 corresponding to the vent hole 2-701. The film can be made of a breathable waterproof film. An earring 2-702 is provided on the circumferential outer side wall of the bottom cover 2-7 for attaching the earphone to the user's ear.

In this embodiment, the sound guiding tube 2-6 is connected to the middle frame 2-3, and the middle frame 2-3 is rotated relative to the surface cover 2-1 to drive the sound guiding tube 2-6 to rotate, thereby realizing the sound guiding tube. The position of the sound end of 2-6 is adjusted to meet the needs of different users.

Embodiment 3

As shown in FIGS. 10-11, an open air conduction earphone includes a housing and a sounding unit disposed in the housing, the sounding unit adopts a speaker 3-2, and the housing includes a cover 3-1 and a bottom. The cover 3-5, a cavity is formed between the cover 3-1 and the bottom cover 3-5, and the horn 3-2 divides the cavity into two chambers, and the chamber facing the sound surface of the horn 3-2 is a front cavity, the other cavity is a rear cavity; a sound hole is arranged on the circumferential side wall of the bottom cover 3-5, the sound hole is communicated with the front cavity, and the bottom cover 3-5 is outside the circumferential side wall The sound-emitting connecting portion 3-502 is disposed at a position corresponding to the sound-emitting hole on the side, and the sound-emitting connecting portion 3-502 has an sounding passage communicating with the sound-emitting hole, and the sound-emitting connecting portion 3-502 is used for A sound guiding tube 3-7 is connected to the sound emitting hole; one end of the sound guiding tube 3-7 is connected to the sound emitting connecting portion 3-502, and the channel inside the sound guiding tube 3-7 is connected with the sound output. The sound channel of the 3-502 is connected, and the other end of the sound tube 3-7 is the sound output end of the earphone. When in use, the sound output end of the sound tube 3-7 can be adjusted to the position corresponding to the cochlea outside the user's ear. The sound guiding tube 3-7 includes a soft rubber tube which is tightly sleeved at the end of the sounding connecting portion 3-502 and can be removed and replaced. Earrings 3-503 are provided on the circumferential outer side wall of the bottom cover 3-5 for attaching the earphone to the user's ear.

A first film 3-3 is attached to the inner side surface of the circumferential side wall of the bottom cover 3-5 corresponding to the sound hole, and the film may be a gas permeable waterproof film. a plurality of vent holes 3-501 are disposed on the circumferential side wall of the bottom cover 3-5, and a second film 3-4 is adhered to the inner side surface of the circumferential side wall of the bottom cover 3-5 corresponding to the vent hole 3-501. The film can be made of a breathable waterproof film.

In order to enable the sound output end of the sound guiding tube 3-7 to be adjusted to achieve an optimal wearing position, the present embodiment has the sound guiding tube 3-7 designed to be bendable and shaped. Specifically, the sound guiding tube 3-7 includes a soft rubber tube. The soft rubber tube is internally provided with a fixed strip 3-6 along the longitudinal direction thereof, and the fixed strip 3-6 can be bent and shaped at any time, and the user directly uses force to guide the guide. When the sound tube 3-7 is bent and oriented, the soft rubber tube is bent and shaped and oriented together with the inner shaping strips 3-6, thereby realizing the adjustment of the sounding end position of the sound guiding tube 3-7, which can meet different user requirements. The number of the shaped strips 3-6 can be set as needed, and can be plural. The cross-sectional shape of the shaped strips 3-6 is also not limited, and can be circular, flat, polygonal, etc., which can be integrally formed by an injection molding process. Inside the soft hose. The shaping strip 3-6 can adopt a metal steel wire, such as a phosphor bronze wire or an aluminum strip, and the phosphor bronze wire has better effect, and can better achieve multiple bending deformation orientation.

As another embodiment, the sound guiding tube 3-7 includes a soft rubber tube, and the outer portion of the soft rubber tube is sleeved with a certain shape tube, and the shaped tube can be bent and shaped at any time, and the user directly applies force to bend and deform the shaped tube. Orientation, the soft hose is bent and shaped together with the shaping tube, thereby realizing the adjustment of the sounding end position of the sound guiding tube 3-7, which can meet different user requirements. One end of the shaped tube is sleeved on the sound-emitting connection portion 3-502 of the earphone main body, and the other end can be mounted with a soft plastic protection head. The shaping tube can adopt a corrugated metal hose, and the material can be selected from stainless steel.

In this embodiment, by combining the soft rubber tube with the shaping strip 3-6 or the shaping tube, the sound guiding tube 3-7 itself can be bent and shaped arbitrarily, so that the position of the sounding end of the sound guiding tube 3-7 can be adjusted. To meet the needs of different users.

Claims

An open air conduction earphone comprises a casing and a sounding unit disposed in the casing, the sounding unit separating the inner space of the casing into a front cavity and a rear cavity, and the sounding part of the sounding unit faces the front cavity, wherein The casing is provided with a sound guiding tube, one end of the sound guiding tube is in communication with the front cavity, and the other end of the sound guiding tube is in communication with the outside.
An open air conduction earphone according to claim 1, wherein the sound guiding tube comprises a soft rubber tube, and the soft rubber tube is internally provided with a fixed strip along the longitudinal direction thereof, and the shaped strip can be bent and shaped at any time. In order to bend the soft hose together to shape.
The open air conduction earphone according to claim 1, wherein the sound guiding tube comprises a soft rubber tube, and the outer portion of the soft rubber tube is sleeved with a certain shape tube, and the shaped tube can be bent and shaped at any time to make The flexible hoses are bent together to shape.
An open air conduction earphone according to claim 1, wherein said housing comprises a fixed housing and a movable housing rotatably coupled to said fixed housing, one end of said sound guiding tube being connected to the movable body On the housing, the movable housing rotates relative to the fixed housing to drive the sound tube to rotate together.
An open air conduction earphone according to claim 4, wherein the fixed casing is provided with a sound outlet communicating with the front cavity, and the movable casing is provided with a sound hole, the sound guide One end of the tube is connected to the sound hole, and the sound hole always corresponds to the sound outlet during the rotation of the movable housing relative to the fixed housing.
The open air conduction earphone according to claim 5, wherein the fixed housing is provided with a limiting slot, and the movable housing is provided with a limiting block, and the limiting block is slidably disposed at the limit Within the position slot, the range of rotation of the movable housing is limited.
An open air conduction earphone according to claim 5, wherein a positioning member is provided between the fixed housing and the movable housing, and the positioning member is used for the movable housing relative to the fixed housing. When turning to a specific position, fix the position of the movable housing.
An open air conduction earphone according to claim 7, wherein the fixed casing is provided with a plurality of positioning grooves, and the movable casing is provided with a positioning block, and the movable casing is rotated relative to the fixed casing. In the middle, the positioning block is rotated into different positioning slots to fix the movable housing in different rotating positions.
An open air conduction earphone according to claim 5, wherein said fixed housing has a first circumferential side wall, and said movable housing has a second circumferential side wall and a second circumferential side wall of said movable housing The rotation is provided outside the first circumferential side wall of the fixed casing, the sound outlet is disposed on the first circumferential side wall, and the sound hole is disposed on the second circumferential side wall.
The open air conduction earphone according to claim 5, wherein the movable housing is rotatably coupled to the fixed housing via a connecting shaft, and a sealing ring is sleeved on the connecting shaft to connect the connecting shaft with A gap seal between the shaft holes provided on the fixed housing.