Hearing aids and charging cases

Abstract

This utility model discloses a hearing aid device and its charging case. The hearing aid device includes a shell, a directional sound-emitting unit, a microphone, and a clamping component. The shell has a mounting cavity and a pickup port and a sound outlet communicating with the mounting cavity. A clamping component is provided on one side of the shell, and the pickup port, sound outlet, and clamping component are located on different sides of the shell. The directional sound-emitting unit is disposed within the mounting cavity, with its sound-emitting side facing the sound outlet. The microphone is disposed within the mounting cavity and communicates with the pickup port. The clamping component is configured to cooperate with the clamping component to clamp the hearing aid device at the wearer's collar. This utility model's hearing aid device enables non-invasive wearing, improves wearing comfort, and eliminates the physical pressure on the ear canal caused by traditional hearing aids. Furthermore, the collar clamping method significantly enhances the device's concealment. By designing the shell shape, the overall visual perception of the hearing aid device is minimized, reducing the wearer's psychological burden.

Description

Technical Field

[0001] This utility model relates to the field of hearing aid technology, and in particular to a hearing aid device and a charging box. Background Technology

[0002] A hearing aid is a small amplification device used by people with hearing loss to compensate for their hearing impairment. In related technologies, hearing aids are typically classified as behind-the-ear (BTE) or in-the-ear (ITE). BTE hearing aids are suspended behind the ear via a hook; although they have high power, their size is noticeable and easily exposes the user's hearing impairment. ITE hearing aids, while more discreet, need to be completely inserted into the ear canal, and prolonged wear can easily cause ear canal discomfort and even inflammation. Both of these traditional hearing aids present problems of wearing discomfort, and their distinctive design can easily create psychological burden for the wearer, especially causing social distress for adolescent users. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a hearing aid device that enables non-invasive wearing, improves wearing comfort, and reduces the psychological burden on the wearer.

[0004] This application also proposes to provide a charging case for storing the aforementioned hearing aids.

[0005] In a first aspect, embodiments of this application provide a hearing aid device, comprising: The housing has a mounting cavity and a pickup port and a sound outlet communicating with the mounting cavity. A clamping part is provided on one side of the housing. The pickup port, the sound outlet and the clamping part are located on different sides of the housing. A directional sound-emitting unit is disposed within the mounting cavity, with the sound-emitting side of the directional sound-emitting unit facing the sound outlet. A microphone is disposed within the mounting cavity and communicates with the microphone port; A clamping member configured to engage with the clamping portion to clamp the hearing aid at the wearer's collar.

[0006] The hearing aid device according to the embodiments of this utility model has at least the following beneficial effects: When the hearing aid device is fixed to a collar by the clamping member and clamping part, the pickup port faces forward to collect ambient sound waves, which are then converted into directional sound waves by the directional sound-emitting unit after noise reduction processing. The sound waves are directionally transmitted to the ear canal through the sound outlet, forming a direct sound path. This achieves non-invasive wearing, improves wearing comfort, and eliminates the physical pressure on the ear canal caused by traditional hearing aids. Furthermore, the collar clamping method significantly enhances the device's concealment, and the design of the shell shape makes the overall visual perception area of ​​the hearing aid device more discreet, reducing the wearer's psychological burden. In addition, the layout design of different sides of the shell physically isolates the pickup and sound-emitting channels, effectively suppressing acoustic feedback.

[0007] According to the first aspect, in one possible implementation, the outer casing includes a first housing and a second housing disposed opposite to each other, and a side housing connecting the outer edge of the first housing and the outer edge of the second housing; the pickup port is disposed in the first housing, the clamping part is disposed in the second housing, and the sound outlet is disposed in the side housing.

[0008] According to the first aspect, in one possible implementation, at least a portion of the structure of one of the clamping member and the clamping part is a magnetic element, and at least a portion of the structure of the other is a magnetic element or an iron sheet. The clamping part is embedded in the second housing, and the clamping member is magnetically attracted to the clamping part.

[0009] According to the first aspect, in one possible implementation, the outer wall surface of the second housing has a limiting groove that matches the shape of the clamping member, and the depth of the limiting groove is less than the thickness of the clamping member.

[0010] According to the first aspect, in one possible implementation, the clamping member has a circular cross-sectional shape and is rotatable within the limiting groove.

[0011] According to the first aspect, in one possible implementation, the sound outlet extends along the edge of the first housing, and the central angles of the two circumferential ends of the sound outlet corresponding to the axis of the hearing aid are less than or equal to 90°.

[0012] According to the first aspect, in one possible implementation, the pickup port is disposed near the edge of the first housing and extends along the edge of the first housing, the pickup port and the sound outlet are circumferentially spaced apart along the first housing, and the central angle between the end of the pickup port and the end of the sound outlet corresponding to the axis of the hearing aid is greater than or equal to 90°.

[0013] According to the first aspect, in one possible implementation, the first housing and the side housing are connected as an integral structure, and the second housing is detachably connected to the side housing.

[0014] According to the first aspect, in one possible implementation, the first housing and the side housing are ceramic, or the first housing and the side housing are made of bio-based materials.

[0015] Secondly, embodiments of this application also provide a charging case, comprising: The housing forms a receiving slot for accommodating the hearing aid device as described in the first aspect; The lid is rotatably connected to the body of the hearing aid, and the lid can rotate relative to the body of the hearing aid to expose the receiving slot and the hearing aid, or to close the receiving slot and the hearing aid.

[0016] The charging case according to the present utility model embodiment has at least the following beneficial effects: the case body and the case cover cooperate to store the hearing aid device as described above, avoid the loss of accessories, and make the hearing aid device easy to carry.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the hearing aid device from one perspective in one embodiment of the present invention; Figure 2 This is a schematic diagram of the hearing aid device from another perspective in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the hearing aid device and charging box in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a hearing aid placed in a charging box according to one embodiment of the present invention.

[0019] Figure label: 100. Hearing aid; 110. Housing; 111. Pickup port; 112. Sound outlet; 113. Clamping part; 114. Limiting groove; 115. First housing; 116. Second housing; 117. Side housing; 120. Clamping component; 200. Charging case; 210. Case body; 211. Storage slot; 220. Case lid. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] In current technology, hearing aids, as important devices for compensating for hearing loss, have long been available in two main forms: behind-the-ear (BTE) and in-the-ear (ITE). Both forms require the main body of the device to be placed inside the auricle or ear canal, causing the wearer's ear to be subjected to mechanical pressure for a long time, which can easily lead to discomfort such as ear canal redness, swelling, and pain. When the device is exposed, its distinctive shape can easily cause the wearer to feel inferior, especially creating a psychological burden in social situations.

[0026] To address the aforementioned problems, this application proposes a hearing aid device. For example... Figure 1 and Figure 2 As shown, in some embodiments, the hearing aid device 100 includes a housing 110, a directional sound-emitting unit (not shown), a microphone (not shown), and a clamping member 120. The housing 110 has a mounting cavity and a pickup port 111 and a sound outlet 112 communicating with the mounting cavity. A clamping part 113 is provided on one side of the housing 110, and the pickup port 111, the sound outlet 112, and the clamping part 113 are distributed on different sides. The directional sound-emitting unit is installed in the mounting cavity and faces the sound outlet 112. The microphone communicates with the pickup port 111, and the clamping member 120 cooperates with the clamping part 113 to achieve collar clamping.

[0027] In this embodiment, when the hearing aid 100 is fixed to the collar by the clamping member 120 and the clamping part 113, the pickup port 111 faces forward to collect ambient sound waves. After noise reduction processing, the sound waves are converted into directional sound waves by the directional sound-emitting unit. The sound waves are then directionally transmitted to the ear canal through the sound outlet 112, forming a direct sound path. This achieves non-invasive wearing, improves wearing comfort, and eliminates the physical pressure on the ear canal caused by traditional hearing aids. Furthermore, the collar clamping method significantly enhances the device's concealment. By designing the shape of the outer shell 110, the overall visual appearance of the hearing aid 100 is closer to that of an accessory, reducing the wearer's psychological burden. In addition, the layout design of different sides of the outer shell 110 physically isolates the pickup and sound-emitting channels, effectively suppressing acoustic feedback.

[0028] The hearing aid device 100 can be designed in the shape of a button. For example, the outer shell 110 of the hearing aid device 100 can be designed as a flat cylinder with a diameter of 3 cm and a thickness of 1.5 cm. Of course, the outer shell 110 of the hearing aid device 100 can also be designed in other shapes, and this application does not limit this.

[0029] Based on the above embodiments, the outer casing 110 includes a first casing 115 and a second casing 116 disposed opposite to each other, and a side casing 117 connecting the outer edges of the first casing 115 and the second casing 116. A microphone 111 is located on the first casing 115, a clamping part 113 is located on the second casing 116, and a sound outlet 112 is located on the side casing 117. The second casing 116 serves as the device fixing surface, and in the wearing state, the second casing 116 contacts the back of the collar. The first casing 115 serves as the acoustic acquisition surface, and the microphone 111 refers to the opening structure for acquiring ambient sound waves; specifically, it can be an array of through holes arranged along the edge of the first casing 115. In the wearing state, the first casing 115 serves as the front face, and the microphone 111 can directly receive signals from the front sound source, avoiding cross-interference with the sound wave path of the side sound outlet 112. The three casings are connected by their outer edges to form a closed cavity, and the internal space is divided into a microphone module installation area, a sound generation module installation area, and a circuit board accommodating area, achieving a three-dimensional layout of the functional components. The relative arrangement of the first housing 115 and the second housing 116 forms a spatial constraint in the thickness direction of the hearing aid 100, so that the mounting cavity is compressed in the vertical direction to a size range suitable for clamping at the collar.

[0030] In this embodiment, the spatial decoupling layout of the functional components of the hearing aid device 100 effectively eliminates acoustic interference between sound pickup and sound generation; the split shell structure compresses the device volume, allowing the hearing aid device 100 to be discreetly clipped to the collar; the functional partition design of the three shells improves wearing comfort while ensuring acoustic performance; and the modular shell connection method provides convenient conditions for the maintenance and replacement of internal components.

[0031] In some embodiments, at least a portion of the clamping member 120 and the clamping part 113 is a magnetic component, and at least a portion of the other is a magnetic component or an iron sheet. The clamping part 113 is embedded in the second housing 116, and the clamping member 120 and the clamping part 113 are magnetically attracted to each other. The magnetic component refers to a material component capable of generating a magnetic field, specifically neodymium iron boron permanent magnets or sintered ferrite, which forms a clamping force through magnetic attraction. The iron sheet refers to a metal component capable of being attracted by the magnetic component, specifically low-carbon steel or silicon steel sheets, which cooperate with the magnetic component to form a closed magnetic circuit. The clamping part 113 being embedded in the second housing 116 means that the clamping structure is completely embedded inside the second housing 116, which can be achieved through injection molding or insert processing, making the clamping part 113 flush with the surface of the second housing 116.

[0032] Taking a case where the clamping element 120 is a magnetic component and the clamping part 113 is an iron sheet as an example, the clamping element 120 and the clamping part 113 generate clamping force through magnetic attraction. After the clamping part 113 is embedded in the second housing 116, the outer surface of the clamping part 113 remains flat with the second housing 116, avoiding the protrusions caused by traditional external clips. During wear, when the clamping element 120 is brought close to the collar, the magnetic component and the iron sheet automatically attract and fix it, eliminating the need for manual adjustment of the mechanical buckle. Due to the self-adaptive nature of the magnetic attraction, the clamping force can be automatically adjusted according to the thickness of the collar.

[0033] Furthermore, the outer wall surface of the second housing 116 has a limiting groove 114, which matches the shape of the clamping member 120, and the depth of the limiting groove 114 is less than the thickness of the clamping member 120. The limiting groove 114 refers to a recessed structure provided on the surface of the second housing 116. Specifically, the limiting groove 114 can be formed by machining or injection molding. The contour of the limiting groove 114 complements the shape of the clamping member 120, constraining the displacement of the clamping member 120 in the planar direction. The clamping part 113 can be formed on the bottom wall or side wall of the limiting groove 114. The depth of the limiting groove 114 being less than the thickness of the clamping member 120 means that the vertical dimension of the limiting groove 114 is less than the overall height of the clamping member 120. This can be achieved by controlling the machining depth of the groove or adjusting the thickness parameters of the clamping member 120, so that the clamping member 120 retains a portion of its exposed structure after being embedded.

[0034] Specifically, the contour of the limiting groove 114 matches the shape of the clamping member 120. When the clamping member 120 approaches the clamping part 113 through magnetic attraction, the sidewall of the limiting groove 114 guides the clamping member 120, forcing it to move along a predetermined path to the target position, eliminating connection misalignment caused by assembly deviation. The design that the depth of the limiting groove 114 is less than the thickness of the clamping member 120 ensures that after the clamping member 120 is embedded in the limiting groove 114, the exposed portion of the clamping member 120 forms an operable protrusion. While maintaining the contact area between the clamping member 120 and the second housing 116, it provides a force point for subsequent rotation adjustment or separation of the clamping member 120. The stepped structure formed between the bottom of the limiting groove 114 and the clamping member 120 prevents the clamping member 120 from detaching in a direction perpendicular to the surface of the second housing 116, while the friction generated by the exposed portion of the clamping member 120 contacting the collar further enhances the clamping stability.

[0035] In a preferred embodiment, the clamping member 120 has a circular cross-sectional shape. The circular structure eliminates directional constraints, allowing the clamping member 120 to rotate in all directions. When the clamping member 120 contacts the collar, the circular cross-sectional structure allows the clamping member 120 to rotate freely around its axis; conversely, after wearing, the outer shell 110 can be rotated to adjust the orientation of the sound outlet 112. The depth design of the limiting groove 114 ensures that the clamping member 120 will not fall out of its fixed position, while allowing the outer shell 110 to perform axially restricted rotational movement as a whole, forming an adaptive clamping state.

[0036] This application further proposes that the sound outlet 112 extends along the edge of the first housing 115, and the central angle of the two ends of the sound outlet 112 corresponding to the axis of the hearing aid 100 is less than or equal to 90°. The sound outlet 112 extending along the edge of the first housing 115 means that the opening direction of the sound outlet 112 is consistent with the edge direction of the first housing 115. Specifically, this can be achieved using an arc-shaped extension or a segmented linear extension structure, so that the sound wave propagation path and the housing shape form a spatial fit. The central angle less than or equal to 90° refers to the range of angles formed by the two ends of the sound outlet 112 with the axis of the hearing aid 100 as the vertex. Specifically, this can be achieved by limiting the proportion of the arc length of the sound outlet 112 to the circumference of the housing. This angle range is used to constrain the lateral diffusion range of sound wave radiation and reduce the scattering of sound waves to non-target areas.

[0037] By limiting the central angles at both ends of the sound outlet 112 to within 90°, the sound wave radiation area is compressed to a quarter-circle range, forming a sound field distribution with a clear directionality. Due to the limited diffusion angle during sound wave propagation, the energy concentration is increased, effectively reducing environmental reflection interference and improving the clarity of sound reaching the wearer's ears.

[0038] The pickup port 111 is located near the edge of the first housing 115 and extends along the edge of the first housing 115. The pickup port 111 and the sound outlet 112 are spaced apart along the circumference of the first housing 115, and the central angle between the end of the pickup port 111 and the end of the sound outlet 112 corresponding to the axis of the hearing aid 100 is greater than or equal to 90°.

[0039] The placement of the pickup port 111 near the edge of the first housing 115 refers to arranging the sound acquisition structure in the circumferential outer area of ​​the housing. This can be achieved using an annular groove or an array of openings, shortening the sound propagation path and improving sensitivity by positioning it at the edge. Extending along the edge means that the shape of the pickup port 111 remains parallel to the housing contour, for example, by using arc-shaped through holes or continuously distributed circular holes, maximizing the sound wave receiving surface. Circumferential spacing means that the pickup port 111 and the sound outlet 112 form a physical isolation zone along the circumference of the housing. This can be achieved through staggered layout or by setting up a sound barrier, blocking the direct reflection path of sound waves on the housing surface. A central angle greater than or equal to 90° refers to the range of the angle between the projections of the two opening ends on the circumference.

[0040] Because the pickup port 111 and the output port 112 form a central angle layout exceeding 90° at their ends, the sound wave propagation paths of the two acoustic channels create an asymmetrical reflection pattern on the housing surface. This separates the sound acquisition area from the core sound-generating area, resolving the mutual interference problem between the sound acquisition and playback channels and reducing howling caused by acoustic feedback. The edge layout of the pickup port 111 enhances the directional capture capability of ambient sound, while the spacing between the output port 112 and the pickup port 111 reduces crosstalk of the directional sound-generating unit vibration to the microphone signal. The central angle control ensures that the two acoustic channels form a minimized overlap area on the housing surface, effectively improving speech intelligibility and signal-to-noise ratio.

[0041] In some possible embodiments, the first housing 115 and the side housing 117 are connected as a single structure. This single structure means that the first housing 115 and the side housing 117 are formed into an inseparable whole through a one-piece molding process, specifically injection molding or ceramic sintering. This ensures the sealing and structural strength of the area where the pickup port 111 and the sound outlet 112 are located. The second housing 116 is detachably connected to the side housing 117. This detachable connection means that the second housing 116 and the side housing 117 are assembled and separated through snap-fit ​​or threaded engagement. Specifically, this can be achieved using magnetic adsorption combined with limiting protrusions, thereby providing operating space for the maintenance of internal components.

[0042] The integrated design of the first housing 115 and the side housing 117 avoids the risk of acoustic leakage caused by splicing multiple components, while also reducing assembly steps. The second housing 116 is detachably fixed to the side housing 117. When maintenance of the clamping part 113 or internal circuitry is required, only the second housing 116 needs to be separated to expose the internal components of the device without damaging the overall structure. This modular design, while ensuring the integrity of the core acoustic components, divides the outer shell 110 into a fixed module and a detachable module, simplifying the production process and reducing maintenance difficulty.

[0043] Furthermore, the first shell 115 and the side shell 117 can be ceramic, specifically zirconia ceramic, alumina ceramic, or titanium ceramic, with a smooth surface and biocompatibility. The first shell 115 and the side shell 117 can also be made of bio-based materials, which are polymers derived from renewable biomass, specifically polylactic acid or starch-based composite materials, whose molecular chains contain biodegradable functional groups.

[0044] When the first shell 115 and the side shell 117 are made of ceramic, the low thermal conductivity of the ceramic material reduces temperature stimulation when in contact with the skin, and its surface hardness is higher than that of the traditional plastic shell 110, preventing scratches caused by friction. When bio-based materials are used, the ester bonds or glycosidic bonds in the material can be decomposed into carbon dioxide and water by microorganisms in the natural environment, solving the problem of long-term residue of plastic shell 110 in electronic waste. The elongation at break of bio-based materials can reach more than 1.5 times that of plastics, enabling elastic deformation under external force. Both materials improve the rigid feel and environmental non-degradability of the traditional hearing aid shell 110 by changing its physicochemical properties.

[0045] Understandably, hearing aids 100 are usually set in pairs, and a pair of hearing aids 100 are set symmetrically.

[0046] This application further proposes a charging case, such as Figures 1 to 4 As shown, in some embodiments, the charging case 200 includes a case body 210, which forms a receiving slot 211 for receiving the hearing aid device 100; the case cover 220 is rotatably connected to the case body 210, and the case cover 220 rotates relative to the case body 210 to expose the receiving slot 211 and the hearing aid device 100, or to close the receiving slot 211 and the hearing aid device 100.

[0047] The housing 210 refers to the container structure that forms the receiving groove 211. It can be manufactured using injection molding, and its internal contour matches the shape of the hearing aid 100 to ensure the device remains fixed during storage. The lid 220 is the component that covers the receiving groove 211. It can be made of metal or plastic and its opening and closing action is achieved through a rotating connection. The rotating connection refers to the movable connection between the lid 220 and the housing 210, which can be achieved using a hinge or pivot structure, allowing the lid 220 to rotate around a fixed axis. The receiving groove 211 is the recessed space formed within the housing 210, which can be formed through molding. Its size is adapted to the shape of the hearing aid 100 to prevent displacement of the device during transportation.

[0048] Specifically, the receiving groove 211 formed inside the housing 210 precisely matches the shape of the hearing aid 100, ensuring the device is completely embedded within the groove during placement, preventing damage from impacts caused by shaking. The lid 220 is connected to the housing 210 via a hinge, allowing users to quickly open or close the storage space by rotating the lid 220, eliminating the need for complex movements when operating with one hand. When the lid 220 is closed, its edges fit tightly against the housing 210, forming a sealed structure that effectively prevents external dust or liquids from entering the receiving groove 211. In the open state, the lid 220 rotates completely to the side of the housing 210, avoiding obstruction of the opening of the receiving groove 211, allowing users to directly observe and retrieve the device. The hinge structure employs a damping design, ensuring the lid 220 remains stable at any angle, preventing the risk of pinching from accidental closure.

[0049] Understandably, the housing 210 usually also has a battery, probe and other structures. The battery is used to store power. When the hearing aid 100 is placed in the receiving slot 211, the probe contacts the contacts on the hearing aid 100 to charge the hearing aid 100. The design of the charging case 200 is similar to that of the headphone charging case, and will not be described in detail in this application.

[0050] In this embodiment, the clamping member 120 can be adsorbed onto the outer shell 110 and placed together in the receiving slot 211, thereby preventing the loss of accessories.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A hearing aid device, characterized in that, include: The housing has a mounting cavity and a pickup port and a sound outlet communicating with the mounting cavity. A clamping part is provided on one side of the housing. The pickup port, the sound outlet and the clamping part are located on different sides of the housing. A directional sound-emitting unit is disposed within the mounting cavity, with the sound-emitting side of the directional sound-emitting unit facing the sound outlet. A microphone is disposed within the mounting cavity and communicates with the microphone port; A clamping element is configured to cooperate with the clamping portion to clamp the hearing aid at the wearer's collar.

2. The hearing assistance device of claim 1, wherein, The outer casing includes a first casing and a second casing disposed opposite to each other, and a side casing connecting the outer edge of the first casing and the outer edge of the second casing; the pickup port is disposed in the first casing, the clamping part is disposed in the second casing, and the sound outlet is disposed in the side casing.

3. The hearing assistance device of claim 2, wherein, Of the clamping member and the clamping part, at least a portion of one of them is a magnetic element, and at least a portion of the other is a magnetic element or an iron sheet. The clamping part is embedded in the second housing, and the clamping member is magnetically attracted to the clamping part.

4. The hearing assistance device of claim 3, wherein, The outer wall of the second housing has a limiting groove that matches the shape of the clamping member, and the depth of the limiting groove is less than the thickness of the clamping member.

5. The hearing assistance device of claim 4, wherein, The clamping member has a circular cross-sectional shape and is capable of rotating within the limiting groove.

6. The hearing assistance device of claim 2, wherein, The sound outlet extends along the edge of the first housing, and the central angles of the two circumferential ends of the sound outlet corresponding to the axis of the hearing aid are less than or equal to 90°.

7. The hearing assistance device of claim 6, wherein, The pickup port is located near the edge of the first housing and extends along the edge of the first housing. The pickup port and the sound outlet are spaced apart circumferentially along the first housing, and the central angle between the end of the pickup port and the end of the sound outlet corresponding to the axis of the hearing aid is greater than or equal to 90°.

8. The hearing assistance device of claim 2, wherein, The first housing and the side housing are connected as a single unit, and the second housing is detachably connected to the side housing.

9. The hearing assistance device of claim 8, wherein, The first housing and the side housing are made of ceramic, or the first housing and the side housing are made of bio-based materials.

10. A charging case characterized by, include: The housing forms a receiving slot for accommodating the hearing aid device as described in any one of claims 1 to 9; The lid is rotatably connected to the body of the hearing aid, and the lid can rotate relative to the body of the hearing aid to expose the receiving slot and the hearing aid, or to close the receiving slot and the hearing aid.

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