CN107801114B

CN107801114B - Waterproof bone conduction earphone and waterproof sealing method thereof

Info

Publication number: CN107801114B
Application number: CN201711045080.2A
Authority: CN
Inventors: 褚建峰
Original assignee: Shenzhen Qiyuan Digital Technology Co ltd
Current assignee: Shenzhen Qiyuan Digital Technology Co ltd
Priority date: 2017-02-10
Filing date: 2017-10-31
Publication date: 2023-06-16
Anticipated expiration: 2037-10-31
Also published as: CN207744106U; CN107801114A

Abstract

The invention aims to provide a waterproof bone conduction earphone and a waterproof sealing method thereof, the waterproof bone conduction earphone comprises a shell and a bone conduction assembly, wherein a waterproof airtight space is formed inside the shell, the bone conduction assembly is accommodated in the waterproof airtight space, the shell is provided with a vibration transmission part which can be in direct contact with skin to transmit sound, and the vibration transmission part transmits vibration generated by the bone conduction assembly out of the waterproof airtight space. The invention has the advantages of good sealing and waterproof effects, convenient and comfortable use, good tone quality, few components, convenient production and manufacturing and cost saving.

Description

Waterproof bone conduction earphone and waterproof sealing method thereof

Technical Field

The invention relates to a waterproof bone conduction earphone and a waterproof sealing method thereof.

Background

The water sports such as swimming are a very good sports mode, can exercise our body well, strengthen our body. However, the sports are very boring, and swimming enthusiasts all like to listen to music while enjoying the pleasure brought by the music when moving on water. Many sports players and sports headphones for use on water have therefore emerged.

However, most of the current water sports music players, headphones and the like adopt a common air conduction loudspeaker and a plurality of structural waterproof films to isolate water, so that the water does not enter the loudspeaker to avoid damage of electronic parts and short circuit of circuits, but the transmission of sound is isolated while the water is prevented from entering, so that the sound quality is very poor, the sound is very small, and the real waterproof and music enjoying requirements cannot be met. The existing bone conduction swimming products are very huge in size, uncomfortable to wear due to heavy weight, and the conduction effect cannot reach the requirement level of consumers.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides the waterproof bone conduction earphone which has the advantages of good sealing and waterproof effects, convenience and comfort in use, good sound quality, few components, convenience in production and manufacturing and cost saving.

In order to achieve the above object, a waterproof bone conduction earphone is provided, which comprises a shell and a bone conduction assembly, wherein a waterproof airtight space is formed inside the shell; the bone conduction component is used for generating vibration and is accommodated in the waterproof airtight space; the shell is provided with a vibration transmission part which can be in direct contact with the skin to transmit sound, and the vibration transmission part is used for transmitting vibration generated by the bone conduction assembly out of the waterproof airtight space. The bone conduction assembly is integrally sealed inside the shell, so that the waterproof effect is good, the use is convenient, and the number of components is small.

Preferably, the bone conduction assembly includes a voice coil, a magnet assembly, and a vibration transmitting plate connected to the magnet assembly, the vibration transmitting plate transmitting vibration to the vibration transmitting part. The vibration transmission part is in fit contact with the human ear to form bone conduction to sound.

Preferably, the shell comprises an upper shell and a lower shell, the vibration transmission part is arranged on the upper shell, and the upper shell and the lower shell are connected in a sealing way to form a waterproof airtight space. The invention connects the upper shell and the lower shell into a whole to form a closed space, thereby achieving the waterproof effect. The voice coil is connected with the power supply part and is partially sealed after being combined with other structures, so that a waterproof music playing product can be formed, and the research and development difficulty of the waterproof product is reduced.

Preferably, the bone conduction assembly includes a voice coil, a magnet assembly, and a vibration transmitting plate connected to the magnet assembly, the voice coil being disposed on the lower case, the vibration transmitting plate transmitting vibration to the vibration transmitting part.

Preferably, the shell further comprises a main shell, a threaded blind hole is formed in the outer wall of the lower side of the lower shell, a concave space for installing the lower side of the lower shell is formed in the main shell, an installation hole corresponding to the threaded blind hole is formed in the end face of the concave space, and a sealing device is arranged between the lower end face of the lower shell and the main shell.

Preferably, the sealing device is waterproof glue for sealing the lower end face of the lower shell.

Preferably, the upper shell end face and the lower shell end face are in sealing connection through ultrasonic melting. The ultrasonic melting mode has good sealing effect and excellent waterproof performance.

Preferably, the lower side of the lower case is provided with a test hole for testing the tightness of the waterproof airtight space.

Preferably, the magnet assembly comprises a connecting frame, a magnet arranged at one end of the connecting frame, and a washer arranged at the outer end of the magnet, and the vibration transmission sheet is arranged at the other end of the connecting frame.

Preferably, a convex groove is arranged in the upper shell, and the vibration transmission sheet is tightly matched with the convex groove and arranged on the upper shell, so that a vibration transmission part is formed on the upper shell.

Preferably, the vibration-transmitting plate is mounted on the housing by a vibration-transmitting plate mount. The vibration transmission sheet, the fixing piece and the connecting frame form an elastic device.

Preferably, one end of the vibration transmission sheet fixing piece is abutted against the inner surface of the bottom of the lower shell, and the other end of the vibration transmission sheet fixing piece is abutted against the vibration transmission sheet. The vibration transmission piece fixing piece is designed, so that a welding process is saved, the installation is simpler, and the overall effect is better.

Preferably, the lower shell is internally provided with a mounting groove for mounting the voice coil, and the lower side of the lower shell is provided with a threading hole for leading a connecting wire of the voice coil to the earphone main board.

The invention breaks through the structural form of the traditional bone conduction loudspeaker, adopts the mode that the voice coil is directly fixed on the lower shell, the vibration transmission sheet is fixed on the fixing piece, the magnet is fixed on the connecting frame and then is connected with the vibration transmission sheet, and the connecting frame, the magnet and the washer form a magnet with a closed loop through bonding, and a vibration system is formed with the voice coil.

A manufacturing method of a waterproof structure of a waterproof bone conduction earphone, wherein a lower shell is protruded to form a tubular threading hole and a waterproof test hole, comprises the following steps:

s1, installing the bone conduction assembly into an upper shell and a lower shell, leading out voice coil wires through the threading holes, and sealing the upper shell and the lower shell to form the waterproof airtight space;

s2, penetrating through holes corresponding to the main body shell through the protruding threading holes and the waterproof test holes of the lower shell, and connecting the lower shell with the main body shell;

s3, a first layer of waterproof glue is dispensed, and the threading hole and the connecting gap between the lower shell and the main body shell are sealed;

s4, pressurizing the waterproof test hole, putting the waterproof bone conduction speaker into water, and indicating that water leakage is avoided if the ultrasonic joint of the upper shell and the lower shell does not bubble;

s5, a second layer of waterproof glue is sprayed, and the waterproof glue is higher than the waterproof test hole of the lower shell.

The two layers of waterproof glue dispensing steps are adopted to seal the threading hole and the waterproof test hole respectively, and the sealing process ensures that the waterproof bone conduction earphone has excellent waterproof sealing effect and does not have the problem of leakage.

Preferably, in step S2, a threaded blind hole is formed in the outer wall of the lower side of the lower shell, a concave space for installing the lower side of the lower shell is formed in the main body shell, a mounting hole corresponding to the threaded blind hole is formed in the end face of the concave space, a screw is screwed into the threaded blind hole through the mounting hole, the lower shell is connected with the main body shell, and the first layer of waterproof glue seals the screw.

Preferably, in step S3, when the first layer of waterproof glue is dispensed, the height of the waterproof glue is higher than the upper ends of the threading holes and the screws, and the waterproof glue is not higher than the waterproof test holes.

Preferably, in step S4, the pressurizing pressure of the waterproof test hole is set according to different waterproof depths.

Drawings

Fig. 1 is a schematic view showing the structure of a lower and upper cases and a bone conduction assembly according to a first embodiment of the present invention;

FIG. 2 is a schematic view showing a structure in which a lower case and an upper case are hermetically connected in a first embodiment of the present invention;

fig. 3 is a schematic view showing a structure in which a lower case is coupled with a main body case in the first embodiment of the present invention;

FIG. 4 is a schematic view of a structure in which a main body case, a lower case and an upper case are hermetically connected in a first embodiment of the present invention;

fig. 5 is a schematic view showing an exploded structure of the lower case, the bone conduction assembly, and the upper case in the first embodiment of the present invention;

FIG. 6 is a schematic view showing the structure of the magnet assembly, vibration-transmitting plate and upper case of the first embodiment of the present invention;

fig. 7 is a schematic structural view of a vibration-transmitting sheet in the first embodiment of the present invention.

Fig. 8 is an assembly schematic view of a vibration-transmitting plate fixing member according to a third embodiment of the present invention.

Fig. 9 is a schematic structural view of a vibration-transmitting plate fixing member according to a third embodiment of the present invention.

Fig. 10 is a schematic diagram showing a combination of an upper case and a lower case in a fourth embodiment of the present invention.

Detailed Description

In the description of the present invention, the terms "upper", "lower", "front" and "rear" and the like refer to the orientation or positional relationship based on that shown in the drawings, for convenience of description of the present invention only and not to require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

The waterproof bone conduction earphone comprises a shell and a bone conduction assembly, wherein a waterproof airtight space is formed inside the shell; the bone conduction component is used for generating vibration and is accommodated in the waterproof airtight space; the shell is provided with a vibration transmission part which can be in direct contact with the skin to transmit sound, and the vibration transmission part is used for transmitting vibration generated by the bone conduction assembly out of the waterproof airtight space. By completely accommodating the bone conduction assembly in the waterproof sealed space, the waterproof bone conduction earphone of the present invention is excellent in waterproof performance without waterproofing by adopting a conventional waterproof membrane.

The bone conduction assembly comprises a voice coil, a magnet assembly and a vibration transmission sheet connected with the magnet assembly, wherein the vibration transmission sheet transmits vibration to the vibration transmission part. The vibration transmission part is formed by a shell forming a waterproof sealing space, and has simple structure and good vibration transmission effect.

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

First embodiment

Referring to fig. 1, 3 and 5, a first embodiment of the present invention is a waterproof bone conduction earphone, the casing includes an upper casing 018 and a lower casing 014, the vibration transmitting part a is disposed on the upper casing 018, the open end of the upper casing 018 is hermetically connected to the upper side of the lower casing 014 to form a waterproof airtight space, and the bone conduction assembly is disposed in the airtight space. In this embodiment, the upper case 018 and the lower case 014 are each a cylindrical case with one end opened, and form a cylindrical waterproof sealed space therebetween. The seal housing may take other forms as well, as will be described in further detail in other embodiments.

When in use, the vibration transmission part A is in fit contact with the human ear to form bone conduction for sound. In the present embodiment, the vibration transmitting portion a is a part of the upper case 018, and the vibration transmitting portion a is a part of the upper end face of the upper case 018 which is flat. The vibration transmission part A can be made of soft elastic materials and is manufactured independently, so that the comfort level of skin contact is improved. An ear cap can be arranged outside the vibration transmission part A.

As a preferred embodiment, the bone conduction assembly includes a voice coil 011, a magnet assembly, and a vibration transmitting sheet 013 connected to the magnet assembly, the vibration transmitting sheet 013 being a thin metal sheet. Fig. 7 shows different types of vibration-transmitting sheets 013, and the middle of each vibration-transmitting sheet 013 with different shapes is provided with a hollowed-out design. The vibration-transmitting sheet 013 may have various shapes such as three-leaf, four-leaf, or straight or curved according to actual needs.

The voice coil 011 is provided on the lower case 014, and the vibration transmitting sheet 013 is mounted on the upper case 018. The vibration generated by the bone conduction assembly is transmitted to the vibration transmission sheet 013, and the vibration of the vibration transmission sheet 013 is further transmitted to the waterproof airtight space at the transmission position of the vibration transmission part A.

Preferably, the housing further includes a main housing 114, referring to fig. 1, a threaded blind hole 115 is provided on an outer wall of a lower side of the lower housing 014, the main housing 114 is provided with a concave space for mounting the lower side of the lower housing, and a mounting hole corresponding to the threaded blind hole is provided on an end surface of the concave space. Screws 118 are threaded through the mounting holes and into blind threaded holes 115 to secure the main housing 114 to the lower housing 014. Because there is a gap between the two after the installation and fixation, the sealing inside the housing is affected, and a sealing device is provided between the lower end surface of the lower housing 014 and the main body housing 114. The sealing device may use waterproof glue sealed at the lower end surface of the lower case, but is not limited thereto.

Referring to fig. 2, in the sealing state of the upper case 018 and the lower case 014, sealing connection is achieved between the upper case (018) end face and the lower case (014) end face by ultrasonic melting. A waterproof ultrasonic line 117 is formed in the ultrasonic melting process, and the height of the waterproof ultrasonic line 117 is 0.3-0.7mm, so that deep waterproof can be achieved.

Referring to fig. 1, the magnet assembly preferably includes a coupling frame 016, a magnet 012 mounted at one end of the coupling frame 016, and a washer 015 provided at an outer end of the magnet 012, wherein the coupling frame 016 is in a semi-sealed state, the magnet 012 is bonded to the coupling frame 016, and the washer 015 is bonded to the magnet 012. In this embodiment, the connecting frame 016 has a U-shaped structure, and the magnet 012 is installed in the U-shaped structure.

Referring to fig. 5 to 6, the vibration-transmitting sheet 013 is mounted at the other end of the connecting frame 016 by a fixing piece 017, and the fixing piece 017 is made of a metal material. In this embodiment, the fixing piece 017 is in a ring shape, and the size of the ring is the same as that of the circular vibration transmitting sheet 013. The fixing piece 017 plays a role in fixing and reinforcing the vibration transmission sheet 013, the vibration transmission sheet 013 is connected with the fixing piece 017 through a multi-point laser electric welding mode, and as a preferable scheme, welding spots are preferably 4 and uniformly distributed on the circumference of the fixing piece 017. After the vibration transmission sheet 013 is welded and connected with the fixing piece 017, the vibration transmission sheet 013 and the connecting frame 016 are also connected by a multipoint laser welding mode, and similarly, 4 welding spots are preferable. The connecting frame 016 is provided with cylindrical bulges at the end where the vibration-transmitting sheet 013 is connected, and the welding spots are uniformly distributed on the end faces of the cylindrical bulges. In this way, the vibration-transmitting sheet 013, the fixing piece 017, and the link 016 form a device having elasticity.

The upper shell 018 is internally provided with a convex groove 0181, the convex groove 0181 forms a circular ring step surface on the inner wall of the upper shell 018, the step surface causes the inner diameter of one end of the upper shell 018 close to the connecting frame 016 to be large, the inner diameter of the other end of the upper shell 018 is smaller, and the vibration transmission sheet 013 is arranged in the convex groove 0181 of the upper shell 018 and is fixed by means of tight fit or glue dispensing. The vibration plate fixing piece 017 may take other forms, and the following embodiments will be discussed.

Referring to fig. 2, the upper end face of the opening of the upper case 018 and the upper end face of the lower case 014 are sealed by ultrasonic melting, a waterproof ultrasonic line 117 is formed during ultrasonic melting, and the waterproof ultrasonic line 117 is 0.3-0.7mm in height, so that deep waterproof can be achieved.

In this embodiment, the lower case 014 is internally provided with a mounting groove 111 for mounting the voice coil 011.

A threading hole 113 for leading a connection wire of the voice coil 011 to the earphone main board is provided on the lower side of the lower case 014. As shown in fig. 1, the threading hole 113 is configured as a through hole formed inside a portion protruding from the lower end surface of the lower case 014.

The voice coil 011 is fixed to the mounting groove 111 of the lower case 014 by means of an adhesive, and the voice coil 011 wire is led out through the threading hole 113 so as to be connected to a power source.

Test port 112 is configured in a similar manner to threading port 113. The test hole 112 is used for testing the tightness of the closed space, and the tubular through hole formed by the protrusion of the test hole 112 is higher than the threading hole 113 by a part. Through holes corresponding to the test holes 112 and the threading holes 113 are provided in the main body case 114 so that the threading holes 113 and the test holes 112 pass therethrough, as shown in fig. 3.

Second embodiment

For the waterproof structure of the waterproof bone conduction earphone in the first embodiment, a corresponding manufacturing process needs to be provided, specifically, the lower case 014 is protruded to form the tubular threading hole 113 and the waterproof test hole 112, which includes the steps of:

s1, installing the bone conduction assembly into an upper shell 018 and a lower shell 014, guiding out a voice coil 011 wire through the threading hole, and sealing the upper shell 018 and the lower shell 014 to form the waterproof airtight space;

s2, penetrating through holes 113 and waterproof test holes 112 of the protrusions of the lower shell through corresponding through holes of the main body shell, wherein the lower shell is connected with the main body shell;

s3, a first layer of waterproof glue 115-A is dispensed, and the threading hole and a connecting gap between the lower shell and the main body shell are sealed, as shown in FIG. 3;

s5, a second layer of waterproof glue 115-B is added, and the waterproof glue is higher than the waterproof test hole of the lower shell.

In the actual production process, the lower side of the lower case 014 is placed in the concave space of the main body case 114, and the connection of the lower case 014 with the main body case 114 is fixed by screws 117. After the lower shell 014 is connected with the main body shell 114, a first layer of waterproof glue 115-A is applied to seal, and the waterproof glue 115-A is higher than the upper ends of the threading holes 113 and the screws 118 when applied to seal the threading holes 113 and the screws 117. The waterproof glue 115-a cannot be higher than the test hole 112 when dispensing. After dispensing, the test fixture 116 of the waterproof test pressurizing machine is connected to the test hole 112 of the lower shell 014 for pressurizing, the waterproof bone conduction speaker is placed in water, if the ultrasonic joint of the upper shell 018 and the lower shell 014 does not bubble, the water leakage is avoided, and the output pressure of the waterproof test device can be set according to different waterproof depths. After the test passes, a second glue 115-B is dispensed, with glue 115-B being raised above test hole 112 of lower housing 014. The power line of the voice coil 011 is higher than the waterproof adhesive 115-B so as to connect to a device such as a motherboard power supply, as shown in fig. 4.

Preferably, the pressurizing pressure of the waterproof test hole 112 may be set according to different waterproof depths.

Third embodiment

The third embodiment differs from the first embodiment in the configuration of the vibration-transmitting sheet fixing member 017.

In this embodiment, as shown in fig. 9, the vibration-transmitting sheet fixing member 017 has a ring-shaped structure. The diameter of the circular ring-shaped fixing piece 017 is slightly smaller than the inner diameter of the cylindrical upper and lower cases in the first embodiment so as to be placed in the waterproof airtight space formed by the upper and lower cases. The length of the fixing piece 017 is the distance from the inner surface of the bottom of the lower case 014 to the vibration transmitting sheet 013, see fig. 8. Thus, the fixing piece 017 has one end abutting against the inner surface of the bottom of the lower case 014 and one end abutting against the edge of the vibration-transmitting sheet 013, thereby fixing the vibration-transmitting sheet 013. Such a fixing method is simpler in process than the fixing method of the first embodiment without welding.

Fourth embodiment

The third embodiment is different from the first embodiment in a case configuration in which a waterproof seal space is formed.

Referring to fig. 10 (a) - (D), fig. 10 (a) shows a combination of the upper case 018 and the lower case 014 in the first embodiment. Other upper and lower shell configurations are employed in this embodiment. In fig. 10 (B), the upper case 018 is in the form of a single cover plate, the lower case 014 is a U-shaped barrel-shaped case, and the lower end face of the lower case 014 and the edge of the upper case 018 are hermetically connected by ultrasonic melting to form a watertight sealed closed space. In fig. 10 (C), the upper case 018 is a U-shaped barrel-shaped case, the lower case 014 is of a single cover plate structure, and the side edges of the lower case 014 are hermetically connected with the inner surface of the lower end portion of the upper case 018. In fig. 10 (D), a flange 019 is provided at the edge of the lower case 014, the flange 019 is covered on the lower end face of the upper case 018, and the flange 019 is hermetically connected to the lower end face of the upper case 018, with respect to fig. 10 (C). The above-mentioned several upper and lower shells can be formed into the water-proof closed space according to the present invention.

The bone conduction vibration conduction sound principle adopted by the invention does not need a sound producing hole like an air conduction loudspeaker, can completely seal and solve the problem of water inflow, and the invention innovates conduction and adopts an innovative structural mode so that the bone conduction loudspeaker has a more stable structure, more true sound and smaller volume.

The invention adopts the mode that the voice coil 011 is directly fixed on the lower shell 014, the vibration transmission sheet 013 is fixed on the fixing piece 017, the magnet 012 is fixed on the connecting frame 016 and then is connected with the vibration transmission sheet 013, and the connecting frame 016, the magnet 012 and the washer 015 form a closed loop magnet through bonding, and a vibration system is formed with the voice coil 011.

The upper case 018 and the lower case 014 of the present invention are integrally connected by ultrasonic melting lines 117 to form a closed space, thereby achieving a waterproof effect. The voice coil 011 is connected with the power supply part and is partially sealed after being combined with other structures, so that a waterproof music playing product can be formed, and the research and development difficulty of the waterproof product is reduced.

Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.

Claims

1. A waterproof bone conduction headset, includes casing and bone conduction subassembly, its characterized in that:

a waterproof airtight space is formed inside the shell;

the bone conduction component is used for generating vibration and is accommodated in the waterproof airtight space;

the shell is provided with a vibration transmission part (A) which can be in direct contact with the skin to transmit sound, and the vibration transmission part (A) is used for transmitting the vibration generated by the bone conduction assembly out of a waterproof airtight space;

the bone conduction assembly comprises a voice coil (011), a magnet assembly and a vibration transmission sheet (013) connected with the magnet assembly, wherein the vibration transmission sheet (013) transmits vibration to the vibration transmission part (A);

the shell comprises an upper shell (018) and a lower shell (014), the vibration transmission part (A) is arranged on the upper shell (018), and the upper shell (018) is in sealing connection with the lower shell (014) to form the waterproof airtight space;

a waterproof test hole (112) for testing the tightness of the waterproof airtight space is arranged on the lower side of the lower shell (014);

a mounting groove (111) for mounting the voice coil is formed in the lower case (014), and a threading hole (113) for leading a connecting wire of the voice coil to a main plate of the earphone is formed in the lower side of the lower case (014), and the threading hole (113) is configured as a through hole formed in the inside of a portion protruding from the lower end surface of the lower case (014);

the tubular through hole formed by the bulge of the waterproof test hole (112) is higher than the threading hole (113) by a part, in the production process, the first layer waterproof glue is higher than the upper end of the threading hole (113) in dispensing, the first layer waterproof glue is not higher than the waterproof test hole (112), after the test is passed, the second layer waterproof glue is dispensed, and the second layer waterproof glue is higher than the waterproof test hole (112).

2. The waterproof bone conduction headset of claim 1, wherein: the shell further comprises a main shell (114), a threaded blind hole (115) is formed in the outer wall of the lower side of the lower shell (014), a concave space for installing the lower side of the lower shell is formed in the main shell (114), a mounting hole corresponding to the threaded blind hole (115) is formed in the end face of the concave space, and a sealing device is arranged between the lower end face of the lower shell (014) and the main shell (114).

3. The waterproof bone conduction headset of claim 2, wherein: the sealing device is waterproof glue for sealing the lower end face of the lower shell.

4. The waterproof bone conduction headset of claim 1, wherein: the end face of the upper shell (018) and the end face of the lower shell (014) are in sealing connection through ultrasonic melting.

5. The waterproof bone conduction headset of claim 1, wherein: the magnet assembly comprises a connecting frame (016), a magnet (012) arranged at one end of the connecting frame (016), and a washer (015) arranged at the outer end of the magnet (012), and the vibration transmission sheet (013) is arranged at the other end of the connecting frame (016).

6. The waterproof bone conduction headset of claim 1, wherein: a convex groove (0181) is formed in the upper shell (018), and the vibration transmission sheet (013) is tightly matched with the convex groove (0181) and mounted on the upper shell (018), so that the vibration transmission part (A) is formed on the upper shell (018).

7. The waterproof bone conduction headset of claim 1, wherein: the vibration transmission sheet (013) is arranged on the shell through a vibration transmission sheet fixing piece (017).

8. The waterproof bone conduction earphone according to claim 7, wherein one end of the vibration transmission sheet fixing piece (017) is abutted against the inner surface of the bottom of the lower shell (014), and the other end is abutted against the vibration transmission sheet (013).

9. A method of waterproof sealing a waterproof bone conduction headset according to any one of claims 1 to 8, characterized in that: the lower shell (014) is protruded to form a tubular threading hole (113) and a waterproof test hole (112), which comprises the steps of:

s1, installing the bone conduction assembly into an upper shell (018) and a lower shell (014), leading out a voice coil (011) wire through the threading hole (113), and sealing the upper shell (018) and the lower shell (014) to form the waterproof airtight space;

s2, a threading hole (113) and a waterproof test hole (112) protruding from the lower shell (014) penetrate through corresponding through holes of the main body shell, and the lower shell (014) is connected with the main body shell (114);

s3, a first layer of waterproof glue is dispensed, and a connecting gap between the threading hole (113) and the lower shell (014) and the main body shell (114) is sealed;

s4, pressurizing the waterproof test hole (112), and placing the waterproof bone conduction speaker into water, wherein if the ultrasonic joint of the upper shell and the lower shell does not bubble, the water leakage is avoided;

10. The waterproof sealing method of the waterproof bone conduction headset according to claim 9, wherein:

in the step S2, a threaded blind hole (115) is formed in the outer wall of the lower side of the lower shell, the main body shell (114) is provided with a concave space for installing the lower side of the lower shell (014), a mounting hole corresponding to the threaded blind hole (115) is formed in the end face of the concave space, a screw (118) is screwed into the threaded blind hole (115) through the mounting hole, the lower shell (014) is connected with the main body shell (114), and the first layer of waterproof glue seals the screw (118).

11. The waterproof sealing method of the waterproof bone conduction headset of claim 10, wherein:

in the step S3, when the first layer of waterproof glue (115-A) is dispensed, the height of the first layer of waterproof glue is higher than that of the threading hole (113) and the upper end of the screw, and the first layer of waterproof glue is not higher than that of the waterproof test hole (112).

12. The waterproof sealing method of the waterproof bone conduction headset according to any one of claims 9 to 11, wherein: in the step S4, the pressurizing pressure of the waterproof test hole (112) is set according to different waterproof depths.