US-20260129358-A1 - ACOUSTIC DEVICES

Abstract

An acoustic device is provided. The acoustic device comprises a housing, a waterproof assembly, an acoustic assembly, a pressure-bearing device, and a sealing member. The housing includes an outer wall, an inner wall, and a sound transmission hole. The sound transmission hole penetrates through the housing and connects an internal space of the housing with an external space. The waterproof assembly is disposed in the internal space and covers the sound transmission hole to prevent liquid from entering the internal space from the external space. The acoustic assembly includes an acoustic sensor and is disposed on a side of the waterproof assembly away from the sound transmission hole and is in sealed connection with the waterproof assembly. The acoustic assembly and the housing form a first gap. The pressure-bearing device covers the acoustic assembly, and the sealing member seals the first gap.

Inventors

• Wenbing ZHOU
• Yujia HUANG
• Hao Ke
• Henghao ZHANG
• Fengyun LIAO
• Xin Qi

Assignees

• Shenzhen Shokz Co., Ltd.

Dates

Publication Date

20260507

Application Date

20251229

Claims (20)

1. 1 . An acoustic device, comprising: a housing including an outer wall, an inner wall, and a sound transmission hole, wherein the sound transmission hole penetrates through the housing and connects an internal space of the housing with an external space; a waterproof assembly disposed in the internal space and covering the sound transmission hole to prevent liquid from entering the internal space from the external space; an acoustic assembly including an acoustic sensor, wherein the acoustic assembly is disposed on a side of the waterproof assembly away from the sound transmission hole and is in sealed connection with the waterproof assembly, and the acoustic assembly and the housing form a first gap; a pressure-bearing device covering the acoustic assembly; and a sealing member sealing the first gap to prevent the liquid from entering the internal space through the first gap.
2. 2 . The acoustic device of claim 1 , wherein when the pressure-bearing device is subjected to an external force in a first direction, the external force is transmitted to a target position of the waterproof assembly such that the waterproof assembly abuts against the inner wall.
3. 3 . The acoustic device of claim 2 , wherein in a second direction perpendicular to the first direction, an outer edge dimension of the pressure-bearing device is greater than an outer edge dimension of the acoustic sensor.
4. 4 . The acoustic device of claim 2 , wherein in a second direction perpendicular to the first direction, an outer edge dimension of the pressure-bearing device is greater than an outer edge dimension of the waterproof assembly.
5. 5 . The acoustic device of claim 1 , wherein the waterproof assembly includes: a waterproof membrane; a first adhesive portion located on a side of the waterproof membrane along the first direction; and a second adhesive portion located on another side of the waterproof membrane along the first direction, wherein the first adhesive portion and the second adhesive portion are annular, and the target position includes annular regions formed by the first adhesive portion and the second adhesive portion.
6. 6 . The acoustic device of claim 5 , wherein the first adhesive portion and the second adhesive portion are in a compressed state in the first direction.
7. 7 . The acoustic device of claim 1 , wherein the housing includes a first accommodation cavity, and the waterproof assembly is disposed in the first accommodation cavity.
8. 8 . The acoustic device of claim 7 , wherein the acoustic assembly further includes a circuit board, and the acoustic sensor is mechanically connected to the circuit board; and the circuit board is mounted at an opening end of the first accommodation cavity and forms the first gap with the opening end.
9. 9 . The acoustic device of claim 7 , wherein the pressure-bearing device is mounted at an opening end of the first accommodation cavity and forms a second gap with the opening end, and the sealing member is filled into the second gap.
10. 10 . The acoustic device of claim 7 , wherein the pressure-bearing device includes a pressure-bearing shell and a second accommodation cavity, and the acoustic sensor is located in the second accommodation cavity; and along the first direction, the pressure-bearing shell includes a first end surface and a second end surface, the second end surface abuts against the circuit board, and the first end surface is away from the circuit board to receive an external force.
11. 11 . The acoustic device of claim 1 , wherein the acoustic sensor includes at least one of a microphone or a speaker; and the pressure-bearing device is made of a rigid material.
12. 12 . The acoustic device of claim 7 , wherein the circuit board is mounted at an opening end of the first accommodation cavity, the circuit board includes at least one positioning hole; and at least one positioning protrusion is provided on an end surface of the opening end and arranged around the opening end, each of the at least one positioning protrusion corresponds to one of the at least one positioning hole, and the at least one positioning protrusion passes through the at least one positioning hole.
13. 13 . The acoustic device of claim 1 , wherein the pressure-bearing device includes at least one positioning hole; and at least one positioning protrusion is provided on the inner wall, each of the at least one positioning protrusion corresponds to one of the at least one positioning hole, and the at least one positioning protrusion passes through the at least one positioning hole.
14. 14 . The acoustic device of claim 13 , wherein each of the at least one of the positioning protrusions includes an expanded end portion having a radial dimension larger than an aperture of the corresponding positioning hole, to secure the circuit board to an end surface of an opening end of a first accommodation cavity of the housing.
15. 15 . The acoustic device of claim 13 , wherein there are two or more positioning protrusions, and the two or more positioning protrusions are uniformly arranged around a first accommodation cavity of the housing.
16. 16 . The acoustic device of claim 2 , wherein an angle between a central axis of the sound transmission hole and the first direction is not less than 30° and not greater than 60°; the sound transmission hole includes a first opening on the outer wall and a second opening on the inner wall, and the second opening is smaller than the first opening; and an average diameter of the sound transmission hole is in a range of 0.6-1.2 mm.
17. 17 . The acoustic device of claim 1 , wherein the sealing member is formed by providing a fluid sealing material into the first gap and subsequently curing the fluid sealing material.
18. 18 . The acoustic device of claim 17 , wherein the fluid sealing material is a sealant.
19. 19 . The acoustic device of claim 1 , wherein the acoustic sensor includes a first acoustic sensor and a second acoustic sensor, the inner wall of the housing includes a housing bottom wall and a housing side wall, the housing bottom wall is provided with a third accommodation cavity for accommodating the first acoustic sensor; and the housing side wall is provided with a fourth accommodation cavity for accommodating the second acoustic sensor.
20. 20 . The acoustic device of claim 1 , wherein the pressure-bearing device is hat-shaped.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a Continuation of International Patent Application No. PCT/CN2023/143664, filed on Dec. 29, 2023, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure belongs to the technical field of electronic devices, and specifically relates to acoustic devices. BACKGROUND A housing of an acoustic device is typically provided with a sound transmission hole that allows sound to pass from an external environment to an interior of the acoustic device or pass from the interior of the acoustic device to the external environment. When the acoustic device is used in an outdoor or humid environment, water may easily enter the acoustic device through the sound transmission hole. For example, for a microphone of a wireless earphone to capture ambient sound and ensure call quality, the wireless earphone is provided with the sound transmission hole to enable sound transmission via air conduction. However, when a user wears the wireless earphone during an underwater activity (e.g., swimming), water may enter the wireless earphone through the sound transmission hole. After water enters the wireless earphone, it may not only adversely affect the normal operation of internal components of the wireless earphone, e.g., causing a malfunction of a microphone or a speaker of the wireless earphone, but may also cause a short circuit in a circuit of a mainboard or other components, thereby preventing the user from normally using the earphone. Therefore, existing acoustic devices require measures to enhance waterproof protection, particularly for components such as microphones and speakers. SUMMARY To address the lack of waterproof protection in the existing acoustic devices, the present disclosure provides an acoustic device with improved waterproof performance. The present disclosure provides an acoustic device comprising a housing, a waterproof assembly, an acoustic assembly, a pressure-bearing device, and a sealing member. The housing includes an outer wall, an inner wall, and a sound transmission hole. The sound transmission hole penetrates through the housing and connects an internal space of the housing with an external space. The waterproof assembly is disposed in the internal space and covers the sound transmission hole to prevent liquid from entering the internal space from the external space. The acoustic assembly includes an acoustic sensor, and the acoustic assembly is disposed on a side of the waterproof assembly away from the sound transmission hole and is in sealed connection with the waterproof assembly. The acoustic assembly and the housing form a first gap. The pressure-bearing device covers the acoustic assembly, and the sealing member seals the first gap to prevent the liquid from entering the internal space through the first gap. In some embodiments, when the pressure-bearing device is subjected to an external force in a first direction, the external force is transmitted to a target position of the waterproof assembly such that the waterproof assembly abuts against the inner wall. In some embodiments, in a second direction perpendicular to the first direction, an outer edge dimension of the pressure-bearing device is greater than an outer edge dimension of the acoustic sensor. In some embodiments, the waterproof assembly includes a waterproof membrane, a first adhesive portion located on a side of the waterproof membrane along the first direction, and a second adhesive portion located on another side of the waterproof membrane along the first direction. The first adhesive portion and the second adhesive portion are annular, and the target position includes annular regions formed by the first adhesive portion and the second adhesive portion. In some embodiments, the first adhesive portion and the second adhesive portion are in a compressed state in the first direction. In some embodiments, the housing includes a first accommodation cavity, and the waterproof assembly is disposed in the first accommodation cavity. In some embodiments, the acoustic assembly further includes a circuit board, and the acoustic sensor is mechanically connected to the circuit board. The circuit board is mounted at an opening end of the first accommodation cavity and forms the first gap with the opening end. In some embodiments, the pressure-bearing device is mounted at an opening end of the first accommodation cavity and forms a second gap with the opening end, and the sealing member is filled into the second gap. In some embodiments, the pressure-bearing device includes a pressure-bearing shell and a second accommodation cavity, and the acoustic sensor is located in the second accommodation cavity. Along the first direction, the pressure-bearing shell includes a first end surface and a second end surface, the second end surface abuts against the circuit board, and the first end surface is away from the circuit board to receive an ext