Air bag expansion in-ear earphone based on external ear special-shaped contour adaptation

Abstract

The invention discloses an air bag expansion in-ear earphone based on external ear special-shaped contour adaptation. The air bag expansion in-ear earphone comprises a bottom shell, a loudspeaker, an air bag, a face shell and an elastic self-locking mechanism. The outer contour face of the bottom shell is matched with an outer lug special-shaped structure, the outer side face is combined with an air bag, the face shell is connected with the bottom shell through a connecting column, an expansion-shrinkage hole is formed in the center of the face shell, and the air bag partially penetrates through the hole. The elastic self-locking mechanism is connected with the outer cover and the bottom shell, penetrates through the telescopic channel of the air bag and comprises a sliding sleeve, a sliding block, a reset spring and a traction rod, and a sliding groove of the sliding block is provided with an upper clamping groove and a lower clamping groove. In a normal state, the elastic self-locking mechanism extends, and the air bag contracts; during wearing, the outer cover is pressed, the elastic self-locking mechanism is compressed and locked, and the outer cover extrudes the air bag to expand in the circumferential direction of the bottom shell to fit the outline of the outer ear. Non-auditory meatus intrusive wearing is achieved, the loudspeaker is suspended and does not make contact with the auditory meatus, the air bag is sealed to form an air layer, the physical noise reduction function and the air pressure absorption function are achieved, oppression is avoided, the earphone is adaptive to different outer ear contours, and the earphone is light, easy to store and good in comfort and sound quality.

Description

Technical Field

[0001] This invention relates to the field of headphone technology, and more specifically to an in-ear headphone with an air-filled expansion design that adapts to the irregular contours of the outer ear. Background Technology

[0002] With the rapid development of consumer electronics technology, in-ear headphones have become one of the mainstream products in the audio equipment field due to their advantages such as high portability and direct sound transmission. Currently, the core design concepts of in-ear headphones on the market mainly revolve around the two major needs of "improved sealing" and "wearing stability," resulting in various structural forms such as ear-hook and in-ear models. Among them, headphones equipped with airbag components, which can achieve self-adaptive fixation through expansion and fit, are gradually becoming a hot area of ​​technological innovation in the industry.

[0003] However, the existing airbag-type headphones still have many structural design flaws related to ergonomic and functional adaptability, leading to significant user pain points during long-term wear. For example, the patent CN202421453258.2, "An Airbag Earhook Headphone," includes an earhook and a headphone body connected to the earhook. The earhook is suspended at the ear and has a cavity inside filled with an airbag. The airbag expands to clamp and fix the earhook around the outer ear. While this design can improve wearing stability through the elastic clamping of the airbag, it has significant shortcomings: Firstly, the wraparound clamping method of the ear hook exerts a continuous squeezing force on sensitive areas of the outer ear such as the antihelix and cymba conchae. Long-term wear can easily lead to poor blood circulation in the outer ear, causing discomfort such as soreness and numbness, and is especially unsuitable for scenarios where headphones are used for extended periods. Secondly, its clamping force only acts on the outside of the outer ear, which cannot ensure a tight seal between the headphone body and the ear canal opening. External environmental noise can easily intrude through the gaps, and the audio signal of the headphone driver unit will also leak, resulting in a decrease in sound clarity and low-frequency performance, making it difficult to meet users' needs for high-quality sound effects.

[0004] Another typical product is "an in-ear headphone" with patent number CN 202211479511.7. Its structure includes a shell and an earbud body. An air bladder is provided on the earbud body. When in use, the entire earbud body needs to be inserted into the ear canal. The air bladder expands inside the ear canal and fits against the ear canal wall to achieve fixation. While this design can improve the seal of the ear canal opening to some extent, it has serious drawbacks: First, the skin inside the ear canal is thin and rich in nerve endings. The expansion of the airbag inside the ear canal will exert continuous radial pressure on the ear canal wall. Long-term wear can easily cause ear canal skin abrasion, redness, and swelling, and may even induce ear canal inflammation, posing a potential threat to the user's ear canal health. Second, secretions inside the ear canal easily adhere to the surface of the airbag and the gaps in the earplug itself, making cleaning difficult and prone to bacterial growth, further aggravating health risks. In addition, there are significant individual differences in the shape and diameter of different users' ear canals. The expansion range of the airbag inside the ear canal cannot accurately adapt to various ear canal shapes, which can easily lead to poor fit. For users with narrow ear canals, excessive pressure will aggravate discomfort. For users with wide ear canals, it is difficult to achieve stable fixation, which can easily lead to loosening and falling off. It is impossible to balance wearing stability and comfort.

[0005] In summary, existing airbag headphones either cause discomfort with prolonged wear due to their tight, surrounding design, and fail to guarantee a seal at the ear canal, affecting sound quality; or their invasive ear canal fixation poses health risks and compatibility issues. A technical solution has yet to be developed that can adapt to the unique contours of the outer ear, achieving a stable fit, reliable seal, and comfortable wearing experience while avoiding ear canal intrusion and excessive pressure on the outer ear. Therefore, developing an airbag inflation structure based on the unique contours of the outer ear to address the wearing pain points and sound quality deficiencies of existing products has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to address the technical shortcomings of existing airbag-type headphones, such as discomfort caused by pressure on the outer ear, inflammation caused by intrusion into the ear canal, poor sealing effect at the ear canal opening, and insufficient fit. This invention provides an airbag-inflated in-ear headphone based on the contour of the outer ear, aiming to achieve non-invasive ear canal wearing. By expanding the airbag circumferentially along the contour of the outer ear, it ensures a sealed connection between the headphone body and the ear canal opening to improve sound quality, while avoiding excessive pressure on the outer ear and damage to the ear canal. It also takes into account wearing stability and long-term comfort, meeting the fitting needs of different users' outer ear contours.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: an air-filled in-ear headphone adapted to the irregular contour of the outer ear, comprising a bottom shell, wherein a storage cavity is provided within the bottom shell, and a speaker is fixedly housed within the storage cavity; characterized in that the outer contour surface of the bottom shell is a structure adapted to the irregular contour formed by the antihelix, cymba conchae, cavum conchae, and tragus of the human outer ear; an air bladder is compositely formed on the outer surface of the bottom shell, the edge of the air bladder extending circumferentially towards the bottom shell; a face shell covers the side of the air bladder away from the bottom shell, and the face shell is connected to the bottom shell by several connecting posts; an expansion hole is provided at the center of the face shell, through which a portion of the air bladder is led outward or retracted inward; an outer cover is adaptedly connected to the expansion hole, and an elastic self-locking mechanism is connected between the outer cover and the bottom shell. One end of the elastic self-locking mechanism is connected to the bottom shell, and the other end is connected to the outer cover. Under normal conditions, the elastic self-locking mechanism is in an extended state, the airbag is in a contracted state, and part of the structure of the airbag extends outward through the expansion and contraction hole on the outer shell. When worn, pressing the outer cover compresses and fixes the elastic self-locking mechanism, and the outer cover seals the expansion and contraction hole, squeezing the airbag circumferentially towards the bottom shell, causing the airbag to expand along the outer contour surface of the bottom shell, forming a fitting structure that conforms to the irregular contour of the outer ear.

[0008] This invention achieves the core design goal of non-invasive ear canal wearing by designing the outer contour of the base shell to conform to the irregular contour formed by the antihelix, cymba conchae, cavum conchae, and tragus of the human outer ear. Combined with an air bladder integrated into the outer surface of the base shell, the air bladder expands circumferentially along the base shell when pressed by the outer cover during wear, forming a structure that perfectly fits the concave and convex curves of the outer ear. On the one hand, the speaker is suspended and fixed through the base shell's storage cavity, never directly contacting the ear canal, thus avoiding compression damage to the inner wall of the ear canal. Simultaneously, the tight fit formed by the expanded air bladder significantly improves... The airtight seal at the ear canal reduces audio signal leakage and utilizes the air layer within the airbag for physical noise reduction, effectively blocking external environmental noise and further optimizing sound quality. Furthermore, the elastic material of the airbag and its conforming design to the outer ear contour ensure a comfortable fit without noticeable pressure. The airbag also absorbs pressure fluctuations generated when the speaker is emitting sound, balancing the pressure inside and outside the ear canal and significantly improving long-term comfort. In addition, the overall structure is streamlined and compact, ensuring the product's portability and ease of daily carrying and use. The retractable design of the airbag in normal operation further enhances storage convenience.

[0009] Preferably, the airbag has a telescopic channel near the elastic self-locking mechanism, the elastic self-locking mechanism passes through the telescopic channel, and the outer wall of the elastic self-locking mechanism slides in conjunction with the inner wall of the telescopic channel.

[0010] The telescopic channel opened near the elastic self-locking mechanism of the airbag in this invention allows the elastic self-locking mechanism to pass through it and slide in cooperation with the inner wall of the channel. This not only guides the telescopic movement of the elastic self-locking mechanism and ensures its operational stability, but also avoids interference between the elastic self-locking mechanism and the airbag, preventing the airbag from being damaged due to uneven local stress and extending the service life of the airbag.

[0011] Preferably, the elastic self-locking mechanism includes a sliding sleeve fixedly connected to the bottom shell and a slider fixedly connected to the outer cover. The slider slides through the sliding sleeve. A return spring is connected between the inner end face of the slider and the inner bottom of the sliding sleeve. The return spring is always in a pre-compressed and expanded state, and the elastic force of the return spring is to push the slider away from the sliding sleeve. A circumferential closed groove is formed on the end face of the slider. A sliding shaft is slidably arranged in the groove. A fixed shaft is provided on the end face of the sliding sleeve. A traction rod is hinged between the sliding shaft and the fixed shaft. The two ends of the traction rod are rotatably connected to the sliding shaft and the fixed shaft, respectively. An upper locking groove is provided at the farthest end of the groove along the extension and retraction direction of the slider and the sliding sleeve, and a lower locking groove is provided at the nearest end along the extension and retraction direction. The bottom of both the upper and lower locking grooves are recessed towards the sliding sleeve, forming a locking structure adapted to the sliding shaft.

[0012] The elastic self-locking mechanism of this invention adopts a linkage structure of sliding sleeve, slider, return spring and traction rod. Combined with the circumferential sliding groove and upper and lower locking groove design on the end face of the slider, it realizes stable switching between the two states of extension locking and compression locking of the elastic self-locking mechanism, ensuring precise control of the airbag's contraction and expansion states. The return spring always maintains a pre-compression state, which can provide stable elastic force for the slider's reset and locking, improving the convenience of wearing operation and structural reliability.

[0013] Preferably, the elastic self-locking mechanism has two states: extension lock and compression lock. (1) When in the extension lock state, the return spring is in a pre-compressed and open state, the sliding shaft is engaged in the lower groove, and the slider extends to the maximum stroke relative to the sliding sleeve, corresponding to the contraction state of the airbag. (2) When in the compression lock state, pressing the outer cover causes the slider to slide into the sliding sleeve, the return spring is further compressed and stored, the sliding shaft slides along the groove and is engaged in the upper groove, and the slider contracts to the minimum stroke relative to the sliding sleeve, corresponding to the state where the airbag is squeezed and expands circumferentially towards the bottom shell. The return spring is in a pre-compressed and open state in both the extension lock state and the compression lock state, only the compression amount in the compression lock state is greater than the compression amount in the extension lock state.

[0014] This invention clearly defines the one-to-one correspondence between the two locking states of the elastic self-locking mechanism and the airbag's contraction and expansion states, ensuring that pressing the outer cover enables the airbag to expand and fit quickly, and releasing the lock enables the airbag to automatically contract and reset, with a clear operating logic; the design of the compression amount of the reset spring in different states ensures the stability of the locking state and avoids excessive spring force from affecting wearing comfort.

[0015] Preferably, there are three connecting posts, which are evenly distributed around the circumference of the shell; the airbag has three positioning channels that correspond one-to-one with the connecting posts, and the connecting posts pass through the positioning channels.

[0016] The present invention has three connecting posts evenly distributed around the circumference of the shell, which, together with the positioning channel on the airbag, not only achieve a stable connection between the shell and the bottom shell, but also provide circumferential positioning for the airbag, preventing the airbag from shifting or wrinkling during expansion or contraction, ensuring that the airbag expands evenly along the outer contour of the bottom shell, and improving the fitting accuracy with the outer ear contour.

[0017] Preferably, a storage hole is formed on the inner side of the bottom shell, the speaker is fixedly disposed at the inner edge of the storage hole, and a mesh cover is sealed on the outer edge of the storage hole. The mesh cover is fixedly connected to the inner side of the bottom shell, and the mesh size of the mesh cover is adapted to the sound penetration requirements of the speaker.

[0018] The design of the storage hole on the inner side of the bottom shell of this invention enables the speaker to be stably fixed. The mesh cover on the outer edge can protect the speaker from the intrusion of external dust and foreign objects, and also ensure the penetration of the speaker's sound output, avoid the mesh cover from causing sound quality attenuation, and further optimize the audio output effect.

[0019] Beneficial Effects: This invention employs an air-filled expansion core structure adapted to the unique contours of the outer ear, innovatively achieving non-invasive ear canal wearing. This fundamentally avoids the risks of ear canal inflammation and excessive pressure on the outer ear, while also offering multiple core advantages: First, the speaker's suspended design does not contact the ear canal. Combined with the tight seal formed by the circumferential expansion of the air-filled air-filled air-filled air layer and its physical noise reduction effect, it reduces audio leakage, improves sound clarity, effectively blocks external noise, and protects hearing. Second, the precise fit of the air-filled ... Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the airbag in the inflated state of the present invention; Figure 2 for Figure 1 Top view; Figure 3 for Figure 1 A bottom view; Figure 4 for Figure 3 Structural cross-sectional view of AA; Figure 5 for Figure 4 A schematic diagram of the structure of the elastic self-locking mechanism in the extended locking state; Figure 6 This is a schematic diagram of the structure of the airbag in the inflated state of the present invention; Figure 7 for Figure 6 Top view; Figure 8 for Figure 6 A bottom view; Figure 9 for Figure 8 Structural sectional view of BB; Figure 10 for Figure 9 A schematic diagram of the structure of the elastic self-locking mechanism in the compression-locked state; Figure 11 This is a schematic diagram illustrating the wearing effect of the present invention in the human ear.

[0021] In the diagram: 1-bottom shell, 2-airbag, 3-face shell, 4-connecting column, 5-expansion / contraction hole, 6-outer cover, 7-elastic self-locking mechanism, 8-storage hole, 9-mesh cover, 10-speaker, 11-sliding sleeve, 12-slider, 13-reset spring, 14-sliding groove, 15-upper groove, 16-lower groove, 17-sliding shaft, 18-fixed shaft, 19-traction rod, 20-telescopic channel. Detailed Implementation

[0022] To make the technical means, creative features and objectives of the present invention easier to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] Example: Figures 1-11As shown, an air-filled in-ear headphone adapted to the irregular contour of the outer ear includes a bottom shell 1. A storage cavity (not separately labeled in the figure) is integrally formed inside the bottom shell 1. A speaker 10 is fixedly housed in the storage cavity by bolts. A storage hole 8 is opened on the inner side of the bottom shell 1 corresponding to the position of the speaker 10. The speaker 10 is snapped and fixed to the inner edge of the storage hole 8. A mesh cover 9 is fixedly sealed to the outer edge of the storage hole 8 by ultrasonic welding. The mesh size of the mesh cover 9 is 0.1-0.3mm, which is adapted to the sound penetration requirements of the speaker 10. It can prevent dust and foreign objects from entering the speaker 10 and causing damage, without affecting the normal transmission of audio signals.

[0024] The outer contour of the bottom shell 1 is an arc-shaped structure that conforms to the irregular contour formed by the antihelix, cymba conchae, cavum conchae, and tragus of the human outer ear, ensuring that the bottom shell 1 can fit the contour curve of the outer ear surface. An air bladder 2 is glued to the outer side of the bottom shell 1. The air bladder 2 is made of medical-grade silicone material, and its edge extends circumferentially towards the bottom shell 1 to form a ring structure around the outer side of the bottom shell 1. The side of the air bladder 2 away from the bottom shell 1 is covered with a face shell 3. The face shell 3 is connected to the bottom shell 1 by three connecting posts 4. The three connecting posts 4 are evenly distributed along the circumference of the face shell 3. The air bladder 2 has three positioning channels that correspond one-to-one with the connecting posts 4 (not individually labeled in the figure). The connecting posts 4 pass through the positioning channels, which limit the circumferential position of the air bladder 2 to prevent the air bladder 2 from shifting or wrinkling during expansion or contraction.

[0025] An expansion and contraction hole 5 is provided through the center of the face shell 3. The middle area of ​​the airbag 2 extends outward or retracts inward through the expansion and contraction hole 5. An outer cover 6 is fitted and snapped into the expansion and contraction hole 5. An elastic self-locking mechanism 7 is connected between the outer cover 6 and the bottom shell 1. A telescopic channel 20 is provided near the elastic self-locking mechanism 7 of the airbag 2. The elastic self-locking mechanism 7 passes through the telescopic channel 20, and the outer wall of the elastic self-locking mechanism 7 slides and engages with the inner wall of the telescopic channel 20. This provides guidance for the telescopic movement of the elastic self-locking mechanism 7 and avoids interference between the elastic self-locking mechanism 7 and the airbag 2.

[0026] like Figure 5 , Figure 10As shown, the elastic self-locking mechanism 7 includes a sliding sleeve 11 fixedly connected to the bottom shell 1 and a slider 12 fixedly connected to the outer cover 6. The slider 12 slides through the sliding sleeve 11. A return spring 13 is connected between the inner end face of the slider 12 and the inner bottom of the sliding sleeve 11. The return spring 13 is always in a pre-compressed and expanded state, and its elastic force is directed to push the slider 12 away from the sliding sleeve 11. A circumferentially closed groove 14 (this end face is a cutting plane) is opened on the end face of the slider 12, and a sliding device slides within the groove 14. A sliding shaft 17 is provided, and a fixed shaft 18 is welded and fixed to the end face of the sliding sleeve 11. A traction rod 19 is hinged between the sliding shaft 17 and the fixed shaft 18. The two ends of the traction rod 19 are rotatably connected to the sliding shaft 17 and the fixed shaft 18 respectively through bearings. The slide groove 14 is provided with an upper locking groove 15 at the farthest end along the extension and retraction direction of the slider 12 and the sliding sleeve 11, and a lower locking groove 16 at the nearest end along the extension and retraction direction. The bottom of the upper locking groove 15 and the lower locking groove 16 are both recessed towards the sliding sleeve 11 to form an arc-shaped locking structure that is adapted to the sliding shaft 17.

[0027] The working process of this invention is as follows: Under normal circumstances (such as) Figures 1-5 As shown), the elastic self-locking mechanism 7 is in the extended locked state, the return spring 13 is in the pre-compressed and expanded state, the sliding shaft 17 is engaged in the lower groove 16, the slider 12 extends to the maximum stroke relative to the sliding sleeve 11, at this time the airbag 2 is in the contracted state, and part of the structure of the airbag 2 extends outward through the expansion and contraction hole 5 on the face shell 3, making it convenient for the user to take out and put in the headphones.

[0028] When wearing (e.g.) Figures 6-11 As shown, the user places the outer contour surface of the bottom shell 1 against the irregular contour of the human outer ear to initially position the earphone. Then, the user presses the outer cover 6, and the slider 12 slides into the sliding sleeve 11. The return spring 13 is further compressed and stored. The sliding shaft 17 slides along the sliding groove 14 and finally engages in the upper locking groove 15. The elastic self-locking mechanism 7 switches to the compression locking state, and the slider 12 contracts to its minimum stroke relative to the sliding sleeve 11. At this time, the outer cover 6 seals the expansion hole 5 and squeezes the airbag 2 circumferentially against the bottom shell 1, causing the airbag 2 to expand along the outer contour surface of the bottom shell 1, forming a fitting structure that adapts to the irregular contour of the outer ear, achieving non-ear canal intrusion fixation. At the same time, the expanded airbag 2 tightly fits the outer ear structure around the ear canal opening, forming a sealed cavity. Combined with the air layer of the airbag 2 itself, it achieves physical noise reduction. The speaker 10 is suspended and does not contact the ear canal, which avoids ear canal damage, reduces audio leakage, and improves sound quality.

[0029] When removing the earphone, press the outer cover 6 again. The sliding shaft 17 disengages from the upper groove 15 and slides along the slide groove 14 to the lower groove 16. The reset spring 13 releases its elastic force to push the slider 12 to reset. The airbag 2 contracts under its own elasticity and returns to normal, making it easy for the user to remove.

Claims

1. An in-ear headphone with air-filled expansion based on the contour of an irregularly shaped outer ear, comprising a bottom shell, wherein a housing cavity is provided within the bottom shell, and a speaker is fixedly housed within the housing cavity; characterized in that, The outer contour surface of the bottom shell is a structure adapted to the irregular contour formed by the antihelix, cymba conchae, cavum conchae and tragus of the human outer ear. An air bladder is composited on the outer side of the bottom shell, and the edge of the air bladder extends circumferentially towards the bottom shell. The side of the airbag away from the bottom shell is covered with a front shell, which is connected to the bottom shell by several connecting posts; The face shell has an expansion hole at its center. A portion of the airbag extends outward or retracts inward through the expansion hole. An outer cover is adapted to be connected to the expansion hole. An elastic self-locking mechanism is connected between the outer cover and the bottom shell. One end of the elastic self-locking mechanism is connected to the bottom shell, and the other end is connected to the outer cover. Under normal conditions, the elastic self-locking mechanism is in an extended state, the airbag is in a contracted state, and part of the structure of the airbag extends outward through the expansion and contraction holes on the face shell. When worn, pressing the outer cover compresses and fixes the elastic self-locking mechanism, and the outer cover seals the expansion and contraction holes, squeezing the airbag circumferentially towards the bottom shell, causing the airbag to expand along the outer contour surface of the bottom shell, forming a fitting structure that conforms to the irregular contour of the outer ear.

2. The air-filled in-ear headphone based on the outer ear's irregular contour as described in claim 1, characterized in that, The airbag has a telescopic channel near the elastic self-locking mechanism. The elastic self-locking mechanism passes through the telescopic channel, and the outer wall of the elastic self-locking mechanism slides in conjunction with the inner wall of the telescopic channel.

3. The air-filled in-ear headphone based on the outer ear's irregular contour as described in claim 1 or 2, characterized in that, The elastic self-locking mechanism includes a sliding sleeve fixedly connected to the bottom shell and a slider fixedly connected to the outer cover, wherein the slider is slidably inserted inside the sliding sleeve. A return spring is connected between the inner end face of the slider and the inner bottom of the sleeve. The return spring is always in a pre-compressed and expanded state, and the direction of the spring force of the return spring is to push the slider to move away from the sleeve. A circumferential closed groove is formed on the end face of the slider, a sliding shaft is slidably arranged in the groove, a fixed shaft is provided on the end face of the sleeve, and a traction rod is hinged between the sliding shaft and the fixed shaft. The two ends of the traction rod are respectively rotatably connected to the sliding shaft and the fixed shaft. The slide groove has an upper locking groove at its farthest end along the extension and retraction direction of the slider and the slide sleeve, and a lower locking groove at its nearest end along the extension and retraction direction. The bottom of both the upper and lower locking grooves is recessed towards the slide sleeve, forming a locking structure that is compatible with the sliding shaft.

4. The air-filled in-ear headphone based on the outer ear's irregular contour adaptation according to claim 3, characterized in that, The elastic self-locking mechanism has two states: extension lock and compression lock. (1) When in the extended locking state, the return spring is kept in the pre-compressed and spread state, the sliding shaft is engaged in the lower groove, and the slider extends to the maximum stroke relative to the sliding sleeve, corresponding to the contraction state of the airbag; (2) When in the compression and locking state, press the outer cover to make the slider slide into the sliding sleeve, the return spring is further compressed and stored, the sliding shaft slides along the sliding groove and is locked in the upper groove, the slider contracts to the minimum stroke relative to the sliding sleeve, corresponding to the state of the airbag being squeezed and expanding circumferentially towards the bottom shell; The return spring is in a pre-compressed and expanded state in both the extended locking state and the compression locking state, except that the compression amount in the compression locking state is greater than that in the extended locking state.

5. The air-filled in-ear headphone based on the outer ear's irregular contour as described in claim 1, characterized in that, The number of connecting posts is three, and the three connecting posts are evenly distributed along the circumference of the shell; the airbag has three positioning channels that correspond one-to-one with the connecting posts, and the connecting posts pass through the positioning channels.

6. The air-filled in-ear headphone based on the outer ear's irregular contour as described in claim 1, characterized in that, A storage hole is provided on the inner side of the bottom shell, the speaker is fixedly installed at the inner edge of the storage hole, and a mesh cover is sealed on the outer edge of the storage hole.

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