A self-cleaning charging case for a hearing aid

Abstract

The application provides a self-cleaning charging box for a hearing aid, comprising a shell and a receiving part arranged at the end of the shell, the receiving part is arranged for storing a hearing aid body, the end of the hearing aid body is provided with a collapsible soft rubber ear cap, characterized in that the receiving part has at least one notch which is gradually narrowed from top to bottom and matches the hearing aid body, the bottom of the notch is connected with a driving part, and at least one isolation shell is arranged in the receiving part, the hearing aid body is arranged in the isolation shell and separated from the receiving part, the self-cleaning charging box for the hearing aid is embedded with the isolation shell between the shell and the box cover, so that the hearing aid arranged in the notch can be separated from the receiving part, the isolation shell is a disposable product, the soft rubber ear cap can avoid contacting the contaminated charging box, the wearing hygiene of the hearing aid is fully ensured, and the user's ear canal is not easy to appear inflammation, infection and other uncomfortable symptoms.

Description

Technical Field

[0001] This invention relates to the field of hearing aid technology, specifically a self-cleaning charging case for hearing aids. Background Technology

[0002] A hearing aid is a small amplification device used by people with hearing impairments to compensate for hearing loss. The basic structure of a hearing aid includes four main parts: a microphone, an amplifier, an earpiece, and a power supply. The hearing aid converts sound signals into electrical signals (electrical energy) and sends them to the amplifier. The amplifier then amplifies the weak input electrical signal and transmits it to the output transducer. The output transducer consists of an earpiece or a bone vibrator, which converts the amplified strong signal from electrical energy back into sound signals (sound energy) or kinetic energy for output. Therefore, the signal transmitted by the earpiece or bone vibrator is much stronger than the signal originally received by the microphone. This can compensate for the hearing loss of people with hearing impairments to varying degrees. Among them, in-ear hearing aids can fit the individual's ear, are easy to put on or take off, make full use of the sound collection function of the outer ear, and are the most comfortable to wear.

[0003] The charging case is a basic accessory for in-ear hearing aids, enabling timely charging when the hearing aid's battery is low. However, when users are out and about, in addition to wearing the charging case, they also need to wear cleaning tools to clean and remove oil from the removed hearing aids, which is extremely inconvenient. If the soft rubber ear tips of the hearing aid could be cleaned while charging, combining charging and cleaning, it would greatly reduce the user's burden. Summary of the Invention

[0004] To address the problems in the prior art, the present invention provides a self-cleaning charging case for hearing aids.

[0005] The technical solution is as follows: A self-cleaning charging case for hearing aids includes a housing and a storage part disposed at the end of the housing. The storage part is configured to store the hearing aid body. The end of the hearing aid body is provided with an expandable soft rubber ear tip. The storage part has at least one recess that adapts to the hearing aid body and gradually narrows from top to bottom. A driving part is connected to the bottom of the recess. At least one isolation shell is provided inside the storage part. The hearing aid body is disposed inside the isolation shell and separated from the storage part. The isolation shell includes a rotating shaft located at the bottom of the shell, a receiving groove disposed around the rotating shaft, and a fork brush that rotates synchronously with the rotating shaft. The fork brush is designed to fit the cross-sectional structure of the hearing aid body ear tip and is densely covered with bristles on the outer layer. The transmission end of the driving part extends out of the storage part and connects to the rotating shaft to drive the fork brush to actively clean the earwax adhering to the outside of the soft rubber ear tip.

[0006] Furthermore, at least one magnetic magnet is provided inside the housing. The magnetic magnet is embedded in a slot at the bottom of the storage part and interacts with a magnetic block provided inside the hearing aid body. At least one through hole is also provided on the housing, and at least one electrical contact is inserted into the through hole. The electrical contact is positioned opposite to an electrical groove provided on the side wall of the hearing aid body.

[0007] Furthermore, the drive unit includes a drive source, a transmission component disposed at the end of the drive source, and at least one transition shaft connected to the transmission component for deceleration. The transition shaft is drivenly connected to an output shaft. The transmission component, at least one transition shaft, and at least one output shaft are sequentially meshed together. The output end of the output shaft extends into the receiving part and is designed with circumferentially distributed vertical grooves. The vertical grooves are designed as protrusions corresponding to the bottom of the rotating shaft.

[0008] Furthermore, the housing contains a lithium battery, a power input port for the lithium battery, and a PCB board for controlling the power output of the lithium battery. The power input port is exposed in the housing. The lithium battery charges the hearing aid body by being electrically connected to the power input contact. The lithium battery, the hearing aid body, and the PCB board together form a closed power circuit. The PCB board issues commands to control the operation of the drive source.

[0009] Furthermore, the housing is movably connected to a lid, and the lid has a notch on the side facing the storage part that is adapted to the hearing aid body, so that the hearing aid body can be clamped and wrapped by the housing and the lid. The outer periphery of the lid is provided with a flange structure, and the edge of the housing is also provided with a concave ring structure that engages with the flange structure.

[0010] Furthermore, the PCB board is also provided with a timing module, a detection module and at least one prompting module. The detection module is used to detect the output voltage of the lithium battery. The prompting module is disposed through the storage part and changes color to indicate the charging status of the hearing aid body according to the monitoring result of the detection module. The timing module receives the start command from the PCB board to control the running time of the drive source.

[0011] Furthermore, it also includes at least one liquid storage tank, which is disposed inside the shell to store high-pressure injected liquefied gas. The input end of the liquid storage tank is connected to a valve nozzle, and the valve nozzle is exposed on the outside of the shell. The output end of the liquid storage tank is connected to a spray nozzle, which extends through the receiving part and the isolation shell to be positioned opposite the soft rubber ear sleeve. The receiving part and the isolation shell are both provided with through holes for the spray nozzle to pass through.

[0012] Furthermore, the nozzle is rotatably fitted inside the output shaft, wherein both the output shaft and the rotating shaft connected thereto are hollow structures, and the end of the rotating shaft also has at least one preset injection hole, so that the high-pressure liquefied gas in the liquid storage tank can be depressurized and sprayed onto the surface of the soft rubber ear sleeve.

[0013] Furthermore, the injection nozzle includes an injection plug, a movable valve stem that can move up and down along the central through hole of the injection plug, and a spring sleeved on the outside of the movable valve stem. The inner cavity of the injection plug has a conical structure, and both ends of the movable valve stem are provided with enlarged balls. The spring elastically supports the movable valve stem to block liquefied gas.

[0014] Furthermore, the bottom end of the rotating shaft is provided with a limiting part, which has a cylindrical structure and a pressure ring at both its upper and lower ends. The inner cavity of the pressure ring at the bottommost end has a conical structure, so that the rotating shaft can pass through the central hole of the isolation shell to complete the assembly.

[0015] The beneficial effects of this invention are:

[0016] (1) The present invention provides a self-cleaning charging case for hearing aids, wherein an isolation shell is embedded between the shell and the lid, so that the hearing aids built into the recess can be separated from the storage part, and the isolation shell is a disposable item, which can prevent the soft rubber ear tips from contacting and contaminating the charging case, thus fully ensuring the hygiene of the hearing aids, making it less likely for the user's ear canal to experience inflammation, infection or other discomfort.

[0017] (2) The present invention provides a self-cleaning charging case for hearing aids, wherein a fork brush adapted to the surface of the soft rubber ear cover is provided at the bottom of the storage part. After the case is closed, the drive source continues to run for a certain period of time, so that the fork brush can rotate and clean the outer layer of the soft rubber ear cover and the sound tube, so that the dirt floating on the soft rubber ear cover can be easily centrifuged and removed, and collected in the receiving groove at the bottom of the isolation shell. No manual operation is required, which is convenient, worry-free and labor-saving.

[0018] (3) The present invention provides a self-cleaning charging box for hearing aids. The box has a liquid storage compartment inside. When the user presses and touches the hearing aid, the volatile liquefied gas in the liquid storage compartment can be controlled to be released. In this way, under the action of airflow, moisture and medicine, the dust and oil on the surface of the soft rubber ear cover can be more easily cleaned. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a cross-sectional structural diagram of a first embodiment of a self-cleaning charging case for a hearing aid according to the present invention;

[0021] Figure 2 This is an exploded structural diagram of a first embodiment of a self-cleaning charging case for hearing aids according to the present invention;

[0022] Figure 3 This is a schematic diagram of the hearing aid assembly in Embodiment 1 of the self-cleaning charging case for hearing aids according to the present invention;

[0023] Figure 4 This is an external view of a second embodiment of the self-cleaning charging case for hearing aids according to the present invention;

[0024] Figure 5 This is a cross-sectional structure of a second embodiment of the self-cleaning charging case for hearing aids according to the present invention;

[0025] Figure 6 This is a transmission structure diagram of the fork brush in Embodiment 2 of the self-cleaning charging box for hearing aids of the present invention;

[0026] Figure 7 This is a cross-sectional view of the valve nozzle in Embodiment 2 of the self-cleaning charging box for hearing aids of the present invention;

[0027] Figure 8 This is a module control diagram of a second embodiment of a self-cleaning charging case for hearing aids according to the present invention.

[0028] In the diagram: 1. Shell; 11. Notch; 12. Magnet; 13. Perforation; 131. Electrical contact; 2. Storage section; 21. Slot; 3. Hearing aid body; 31. Soft ear tip; 32. Magnet; 33. Electrical slot; 4. Isolation shell; 41. Shaft; 411. Protrusion; 412. Limiting section; 4121. Pressure ring; 413. Jet hole; 42. Receiving groove; 43. Fork brush; 431. Bristle; 5. Drive section; 51. Drive source; 52. Transmission component; 53. Transition shaft; 54. Output shaft; 541. Vertical slot; 6. Lithium battery; 61. Power connector; 7. PCB board; 71. Timing module; 72. Detection module; 73. Indication module; 8. Cover; 81. Notch; 82. Flange structure; 83. Concave ring structure; 9. Liquid reservoir; 91. Valve nozzle; 92. Spray nozzle; 921. Spray plug; 922. Valve stem; 923. Spring. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] Example 1, as Figure 1-3As shown, the present invention provides a self-cleaning charging case for a hearing aid, including a housing 1 and a storage part 2 disposed at the end of the housing 1. The storage part 2 is configured to store the hearing aid body 3. The end of the hearing aid body 3 is provided with an expandable soft rubber ear tip 31. The storage part 2 has at least one notch 11 that adapts to the hearing aid body 3 and gradually narrows from top to bottom. The bottom of the notch 11 is connected to a driving part 5. The storage part 2 is covered with at least one isolation shell 4. The hearing aid body 3 is disposed in the isolation shell 4 and separated from the storage part 2. The isolation shell 4 includes a rotating shaft 41 located at the bottom of the shell, a receiving groove 42 disposed around the rotating shaft 41, and a fork brush 43 that rotates synchronously with the rotating shaft 41. The fork brush 43 is designed to fit the cross-sectional structure of the ear tip of the hearing aid body 3, and the outer layer is densely covered with bristles 431. The transmission end of the driving part 5 extends out of the storage part 2 and connects to the rotating shaft 41 to drive the fork brush 43 to actively clean the earwax adhering to the outside of the soft rubber ear tip 31.

[0031] In this embodiment, the isolation shell 4 is made of thin plastic material or rigid environmentally friendly paper, which is easy to manufacture and has low production cost. A small hole is provided at the bottom of the isolation shell 4 for connecting the rotating shaft 41. Another pair of small holes are provided on the side wall of the isolation shell 4 for connecting to electricity. In this way, when the hearing aid body 3 is placed into the isolation shell 4 that fits the recess 11 structure, the hearing aid body 3 will not stick to the inner wall of the recess 11, thus avoiding the situation where dirt, dust or oil stains adhere to the recess 11. Compared with directly placing the hearing aid body 3 into the recess 11, this avoids the disadvantage of not having to clean the recess 11 frequently. In addition, the fork brush 43 is disposable, so that the fork brush 43 will not be contaminated due to continuous use.

[0032] Furthermore, at least one magnetic magnet 12 is provided inside the housing 1. The magnetic magnet 12 is embedded in the slot 21 at the bottom of the storage part 2, and the magnetic magnet 12 interacts with the magnet block 32 provided inside the hearing aid body 3. At least one through hole 13 is also provided on the housing 1. At least one electrical contact 131 is inserted into the through hole 13. The electrical contact 131 is arranged opposite to the electrical groove 33 provided on the side wall of the hearing aid body 3.

[0033] In this embodiment, the adsorption magnet 12 and the magnet block 32 are aligned, so that the hearing aid body 3 can be attracted by the adsorption magnet 12 when it approaches the housing 1, so that the power contact 131 of the hearing aid body 3 can always maintain good contact with the power slot 33, ensuring charging safety; the notch 11 is adapted to the bottom contour structure of the hearing aid body 3, so that the insertion method of the hearing aid body 3 is unique, and the power contact 131 and the power slot 33 can be aligned naturally, making charging convenient, and the hearing aid body 3 is not easy to slip off after the case cover 8 is opened.

[0034] Furthermore, the drive unit 5 includes a drive source 51, a transmission member 52 disposed at the end of the drive source 51, and at least one transition shaft 53 connected to the transmission member 52 for deceleration. The transition shaft 53 is drivenly connected to an output shaft 54. The transmission member 52, at least one transition shaft 53 and at least one output shaft 54 ​​are sequentially meshed together. The output end of the output shaft 54 ​​extends into the receiving part 2 and is designed with circumferentially distributed vertical grooves 541. The vertical grooves 541 are designed as protrusions 411 corresponding to the bottom of the rotating shaft 41.

[0035] In this embodiment, the drive source 51 can be a drive motor, the transmission component 52 is a first bevel gear, and the transition shaft 53 achieves transmission by meshing the second bevel gear in its middle with the first bevel gear. In this way, the third bevel gear at the end of the transition shaft 53 can continuously mesh with the fourth bevel gear at the bottom of the output shaft 54, thus achieving transmission in sequence. It is worth mentioning that in this process, by adjusting the gear size of adjacent bevel gears, the output speed of the drive unit 5 can be controlled and adjusted. For example, if the gear radius of the first bevel gear is designed to be lower than that of the second bevel gear, the output speed of the drive motor can be reduced, thereby reducing the speed of the fork brush 43 and avoiding the situation where the speed is too fast, which could lead to the damage of the isolation shell 4. On the other hand, when the number of notches 11 is greater than two, multiple sets of third bevel gears can be set on the transition shaft 53 to drive multiple output shafts 54, so that the self-cleaning charging box can provide charging, cleaning, and disinfection services for multiple hearing aids at the same time.

[0036] Furthermore, a lithium battery 6, a power input port 61 for providing power to the lithium battery 6, and a PCB board 7 for controlling the power output state of the lithium battery 6 are installed inside the housing 1. The power input port 61 is set to be exposed in the housing 1. The lithium battery 6 charges the hearing aid body 3 by being electrically connected to the power contact 131. The lithium battery 6, the hearing aid body 3, and the PCB board 7 together form a closed power circuit. The PCB board 7 issues commands to control the operation of the drive source 51.

[0037] In this embodiment, after the hearing aid body 3 is connected for charging, a current can be naturally formed between the lithium battery 6, the hearing aid body 3, and the PCB board 7. This allows the PCB board 7 to operate automatically, avoiding power loss caused by the charging box being in standby mode when using the charging box. Furthermore, the PCB board 7 can be used to control the start of the drive source 51. It is designed that the PCB board 7 sends a start command to the drive source 51 as soon as it is powered on. When the user needs to clean the hearing aid, they only need to insert the hearing aid body 3 into the notch 11 to achieve timely cleaning.

[0038] Furthermore, the housing 1 is movably connected to a cover 8. The cover 8 has a notch 81 on the side facing the storage part 2 that is adapted to the hearing aid body 3, so that the hearing aid body 3 can be clamped and wrapped by the housing 1 and the cover 8. The outer periphery of the cover 8 is provided with a flange structure 82, and the edge of the housing 1 is also provided with a concave ring structure 83 that is fastened and connected to the flange structure 82.

[0039] In this embodiment, the notch 81 is adapted to the structure of the upper part of the hearing aid body 3. In this way, the notch 81 and the recess 11 together hold the hearing aid body 3, which can effectively protect the hearing aid body 3 from damage or possible loss. The shell 1 and the cover 8 are fixed together by a snap-fit ​​connection. Optionally, the edges of the shell 1 and the cover 8 are connected by a hinge shaft, which can prevent the cover 8 from separating from the shell 1 and prevent the loss of parts. Preferably, the shell 1 and the cover 8 are respectively built with magnetic pillars. Through the principle of opposite poles attracting each other, the operation of the cover 8 can be enhanced, making it less likely for the hearing aid body 3 to fall out of protection.

[0040] Furthermore, the PCB board 7 is also provided with a timing module 71, a detection module 72 and at least one prompting module 73. The detection module 72 is used to detect the output voltage of the lithium battery 6. The prompting module 73 is disposed through the storage part 2 and changes color to indicate the charging status of the hearing aid body 3 according to the monitoring result of the detection module 72. The timing module 71 receives the start command from the PCB board 7 to time and control the running time of the drive source 51.

[0041] In this embodiment, the detection module 72 can be either a voltage testing circuit or a current testing circuit. The PCB board 7 receives the detection voltage or current from the detection module 72 and determines the charging level of the hearing aid body 3 based on the decrease in the detection voltage or current. The prompt module 73 is a multi-color light-emitting diode. In the charging state, the prompt module 73 displays red light, and in the fully charged state, the prompt module 73 displays green light, which is convenient for the user to distinguish. Preferably, multiple prompt modules 73 are provided. The number of lights displayed by the prompt modules 73 reflects the charging level of the hearing aid body 3, which can help the user identify the remaining power of the hearing aid body 3.

[0042] Example 2, as Figure 4-8As shown, the difference from Embodiment 1 is that the present invention provides a self-cleaning charging case for a hearing aid, including a housing 1 and a storage part 2 disposed at the end of the housing 1. The storage part 2 is configured to store the hearing aid body 3. The end of the hearing aid body 3 is provided with an expandable soft rubber ear tip 31. The storage part 2 has at least one notch 11 that adapts to the hearing aid body 3 and gradually narrows from top to bottom. The bottom of the notch 11 is connected to a driving part 5. At least one isolation shell 4 is provided inside the storage part 2. The hearing aid body 3 is disposed inside the isolation shell 4 and separated from the storage part 2. The isolation shell 4 includes a rotating shaft 41 located at the bottom of the shell, a receiving groove 42 disposed around the rotating shaft 41, and a forked brush 43 that rotates synchronously with the rotating shaft 41. The fork brush 43 is designed to fit the cross-sectional structure of the earpiece of the hearing aid body 3, and its outer layer is densely covered with fluff 431. The transmission end of the drive unit 5 passes through the storage unit 2 and connects to the rotating shaft 41 to drive the fork brush 43 to actively clean the earwax adhering to the outside of the soft rubber ear cover 31. It also includes at least one liquid storage tank 9. The liquid storage tank 9 is set in the housing 1 to store high-pressure jet liquefied gas. The input end of the liquid storage tank 9 is connected to a valve nozzle 91, and the valve nozzle 91 is exposed on the outside of the housing 1. The output end of the liquid storage tank 9 is connected to a jet nozzle 92. The jet nozzle 92 extends through the storage unit 2 and the isolation shell 4 to be positioned directly opposite the soft rubber ear cover 31. The storage unit 2 and the isolation shell 4 are both provided with through holes for the jet nozzle 92 to pass through.

[0043] In this embodiment, the isolation shell 4 is made of thin plastic material or rigid environmentally friendly paper, which is simple to manufacture and has low production cost. A small hole is provided at the bottom protrusion of the isolation shell 4 for connecting the rotating shaft 41, and another pair of small holes are provided on the side wall of the isolation shell 4 for connecting electricity. In this way, when the hearing aid body 3 is placed into the isolation shell 4 that fits the recess 11, the hearing aid body 3 will not stick to the inner wall of the recess 11, thus avoiding the situation where dirt, dust or oil stains adhere to the recess 11. Compared with directly placing the hearing aid body 3 into the recess 11, this avoids the disadvantage of not needing to clean the recess 11 frequently. In addition, the fork brush 43 is disposable, so that the fork brush 43 will not be damaged by the friction of the rubber. To prevent contamination from continuous use, the reservoir 9 can store liquefied nitrogen. The valve 91 is a one-way valve that can be connected to an inflation gun. This allows the reservoir 9 to be supplied with liquid nitrogen when the liquefied nitrogen content is insufficient. By pressing the hearing aid body 3, the spray nozzle 92 can be opened, allowing the liquid nitrogen to be quickly depressurized and sprayed. The liquid nitrogen cools the moisture in the air, forming small droplets. This makes it easy to wet the soft ear cover 31, facilitating the cleaning of oil stains, earwax, and dust, and preventing ear canal infections caused by wearing the hearing aid again. It is worth mentioning that a small amount of disinfectant and water can also be mixed into the liquefied nitrogen, which can make the depressurization and cleaning effect more thorough.

[0044] Furthermore, the nozzle 92 is rotatably sleeved inside the output shaft 54, wherein the output shaft 54 ​​and the rotating shaft 41 connected thereto are both hollow structures, and the end of the rotating shaft 41 also has at least one preset injection hole 413, so that the high-pressure liquefied gas in the liquid storage tank 9 can be depressurized and sprayed onto the surface of the soft rubber ear sleeve 31.

[0045] In this embodiment, the gas ejected by the nozzle 92 can flow through the output shaft 54 ​​and the rotating shaft 41, and then be ejected laterally from the injection hole 413, so that the outer wall of the soft rubber ear sleeve 31 can be fully rinsed; the number of vertical grooves 541 and protrusions 411 of the output shaft 54 ​​is the same, so that after the output shaft 54 ​​is inserted into the rotating shaft 41, the rotating shaft 41 can be driven to rotate synchronously by the misaligned vertical grooves 541 and protrusions 411.

[0046] Furthermore, the injection nozzle 92 includes an injection plug 921, a movable valve stem 922 that can move up and down along the central through hole of the injection plug 921, and a spring 923 sleeved on the outside of the movable valve stem 922. The inner cavity of the injection plug 921 has a conical structure, and both ends of the movable valve stem 922 are provided with enlarged balls. The spring 923 elastically supports the movable valve stem 922 to block liquefied gas.

[0047] In this embodiment, the up-and-down movement of the valve stem 922 can change the venting state of the nozzle 92. The spring 923 pushes the upper expanded ball, which can cause the lower expanded ball to block the bottom port of the conical structure. When the valve stem 922 is pushed down, the lower expanded ball separates from the bottom port, which allows the high-pressure gas inside the nozzle 92 to be ejected. Preferably, multiple notches are provided at the edge of the narrow end of the conical structure, which can allow the lower expanded ball to still eject gas even when it is separated from the bottom port while keeping the valve stem 922 sliding linearly along the narrow end.

[0048] Furthermore, the bottom end of the rotating shaft 41 is provided with a limiting part 412, which has a cylindrical structure and is provided with a pressing ring 4121 at both its upper and lower ends. The inner cavity of the lowermost pressing ring 4121 has a conical structure, so that the rotating shaft 41 can pass through the central hole of the isolation shell 4 to complete the assembly.

[0049] In this embodiment, the rotating shaft 41 is made of plastic, resulting in low production costs. The limiting part 412 can slide up and down within the small hole at the raised end of the middle of the isolation shell 4 while maintaining rotation. This allows the rotating shaft 41 to automatically move upward when it presses against the spray nozzle 92, providing a basis for manual spray cleaning by the user. Furthermore, the cone-shaped pressing ring 4121 can easily pass through the small hole at the raised end of the middle of the isolation shell 4, simplifying the assembly process of the isolation shell 4. Notably, the protrusion 411 is located within the circular recess on the bottom side of the limiting part 412, allowing the limiting part 412 to rotate with the output shaft 54.

[0050] Working principle: When in use, first open the case cover 8, allowing the hearing aid body 3 to be inserted into the recess 11. Under the magnetic force of the magnet 32 ​​and the magnetic attraction magnet 12, the hearing aid body 3 fits tightly against the storage part 2. This causes the electrical contact 131 to contact the electrical slot 33, forming a closed circuit between the lithium battery 6 and the hearing aid body 3, charging the hearing aid. Upon receiving the start command, the timing module 71 controls the drive source 51 to run for at least one minute. This allows the rotating fork brush 43 to cyclically clean the soft rubber ear tips 31 and... Earwax and dust inside the microphone tube are knocked into the receiving slot 42, allowing the dried earwax to fall out. After charging is complete, the indicator module 73 will show a green light to indicate that charging is complete. If necessary, pressing the hearing aid body 3 will cause the rotating shaft 41 under the hearing aid body 3 to squeeze the valve stem 922 downward. This allows the liquefied high-pressure gas in the liquid reservoir 9 to be quickly vaporized and ejected, carrying a small amount of water and disinfectant. This allows for a secondary cleaning of the soft rubber ear tips 31, greatly simplifying the user's operation process.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning charging case for a hearing aid, comprising a housing (1), at least one liquid reservoir (9), and a storage portion (2) disposed at the end of the housing (1), the storage portion (2) being configured to store a hearing aid body (3), the end of the hearing aid body (3) being provided with an expandable soft rubber earpiece (31), characterized in that, The storage section (2) has at least one recess (11) that gradually narrows from top to bottom to fit the hearing aid body (3). The bottom of the recess (11) is connected to a drive section (5). The storage section (2) is covered with at least one isolation shell (4). The hearing aid body (3) is disposed inside the isolation shell (4) and separated from the storage section (2). The isolation shell (4) includes a rotating shaft (41) located at the bottom of the shell, a receiving groove (42) arranged around the rotating shaft (41), and a fork brush (43) that rotates synchronously with the rotating shaft (41). The fork brush (43) is designed to fit the cross-sectional structure of the earplug of the hearing aid body (3), and the outer layer is densely covered with fluff (431). The transmission end of the drive unit (5) passes through the storage unit (2) and connects to the rotating shaft (41) to drive the fork brush (43) to actively clean the earwax adhering to the outside of the soft rubber ear cover (31). The liquid reservoir (9) is set inside the shell (1) to store high-pressure jet liquefied gas. The input end of the liquid reservoir (9) is connected to a valve nozzle (91), and the valve nozzle (91) is exposed on the outside of the shell (1). (9) has a nozzle (92) connected to its output end. The nozzle (92) extends through the storage part (2) and the isolation shell (4) to be directly opposite the soft rubber ear sleeve (31). The storage part (2) and the isolation shell (4) are both provided with through holes for the nozzle (92) to pass through. The nozzle (92) includes a spray plug (921), a movable valve rod (922) that can move up and down along the central through hole of the spray plug (921), and a spring (923) sleeved on the outside of the movable valve rod (922). The inner cavity of the injection plug (921) is conical, and both ends of the movable valve stem (922) are provided with enlarged balls. The spring (923) elastically supports the movable valve stem (922) to block liquefied gas. The bottom end of the rotating shaft (41) is provided with a limiting part (412). The limiting part (412) is cylindrical, and both its upper and lower ends are provided with a pressure ring (4121). The inner cavity of the pressure ring (4121) at the bottom is conical, so that the rotating shaft (41) can pass through the central hole of the isolation shell (4) to complete the assembly.

2. The self-cleaning charging case for hearing aids according to claim 1, characterized in that, The housing (1) is provided with at least one magnet (12), which is embedded in the slot (21) at the bottom of the storage part (2). The magnet (12) interacts with the magnet block (32) provided inside the hearing aid body (3). The housing (1) is also provided with at least one perforation (13), and at least one electrical contact (131) is inserted into the perforation (13). The electrical contact (131) is disposed opposite to the electrical groove (33) provided on the side wall of the hearing aid body (3).

3. A self-cleaning charging case for hearing aids according to claim 2, characterized in that, The drive unit (5) includes a drive source (51), a transmission member (52) disposed at the end of the drive source (51), and at least one transition shaft (53) connected to the transmission member (52) for deceleration. The transition shaft (53) is connected to an output shaft (54). The transmission member (52), at least one transition shaft (53) and at least one output shaft (54) are sequentially meshed. The output end of the output shaft (54) extends into the storage unit (2) and is designed with circumferentially distributed vertical grooves (541). The vertical grooves (541) are designed as protrusions (411) corresponding to the bottom of the rotating shaft (41).

4. A self-cleaning charging case for hearing aids according to claim 3, characterized in that, The housing (1) contains a lithium battery (6), a power input port (61) for the lithium battery (6), and a PCB board (7) for controlling the power output of the lithium battery (6). The power input port (61) is exposed in the housing (1). The lithium battery (6) charges the hearing aid body (3) by being electrically connected to the power contact (131). The lithium battery (6), the hearing aid body (3), and the PCB board (7) together form a closed power circuit. The PCB board (7) issues a command to control the operation of the drive source (51).

5. A self-cleaning charging case for a hearing aid according to claim 4, characterized in that, The housing (1) is movably connected to a cover (8). The cover (8) has a notch (81) on the side facing the storage part (2) that is adapted to the hearing aid body (3), so that the hearing aid body (3) can be clamped and wrapped by the housing (1) and the cover (8). The outer periphery of the cover (8) is provided with a flange structure (82), and the edge of the housing (1) is also provided with a concave ring structure (83) that is fastened and connected to the flange structure (82).

6. A self-cleaning charging case for a hearing aid according to claim 5, characterized in that, The PCB board (7) is also provided with a timing module (71), a detection module (72) and at least one prompting module (73). The detection module (72) is used to detect the output voltage of the lithium battery (6). The prompting module (73) is set through the storage part (2) and changes color to indicate the charging status of the hearing aid body (3) according to the monitoring result of the detection module (72). The timing module (71) receives the start command from the PCB board (7) to time and control the running time of the drive source (51).

7. A self-cleaning charging case for a hearing aid according to claim 6, characterized in that, The nozzle (92) is rotatably fitted inside the output shaft (54), wherein the output shaft (54) and the rotating shaft (41) connected thereto are both hollow structures, and the end of the rotating shaft (41) also has at least one preset injection hole (413), so that the high pressure liquefied gas in the liquid storage tank (9) can be depressurized and sprayed onto the surface of the soft rubber ear sleeve (31).

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