CN209283514U - A 3D printed customized hearing aid - Google Patents

Abstract

The utility model discloses a 3D printing customized hearing aid, which comprises a shell, a cover and an electronic component. The inside of the shell is provided with a cavity for accommodating the electronic component. At least a part of the side wall of the shell has the same shape and structure as the inner cavity of the ear canal. The electronic component includes Battery compartment, battery module, amplifier, receiver, microphone and control module, the shell is provided with an outer end and an inner end, the outer end is connected to a cover, the cover is provided with a sound hole, the inner end is provided with an inner end, and the inner end is provided with an inner end. There is a sound outlet on the end face, the battery compartment is connected to the cover, the battery module is connected to the battery compartment, a receiver is installed at the sound outlet, the receiver is connected to the amplifier, the amplifier is connected to the microphone, and the microphone is set at the sound hole on the cover . The 3D printing customized hearing aid involved in the utility model is made of titanium or titanium alloy and customized by 3D printing, which can realize a thin-walled shell and facilitate the installation of electronic components. Due to its strong fit, it is comfortable and stable to wear , and the sound quality is clearer.

Description

A 3D printed customized hearing aid

technical field

The utility model belongs to the technical field of using 3D printing technology to manufacture hearing aids, in particular to a 3D printing customized hearing aid.

Background technique

The essence of a hearing aid is an amplifier, which amplifies the sound in a certain way, so that the hearing impaired can effectively use their residual hearing in a certain way. Hearing aids are mainly composed of microphones, amplifiers, receivers, power supplies and housings. According to the different shell production methods, it can be divided into non-customized hearing aids and customized hearing aids. The shape of the non-customized hearing aid shell is single, which cannot be well adapted to different human ear shapes, and it is easy to form local pressure and gaps on the ear canal and the concha cavity, so it has the following disadvantages when worn: uncomfortable to wear, easy to fall off, poor sound insulation effect . Traditional customized hearing aid shells are generally handmade. After a series of manual operations such as making ear impressions, waxing ear impressions, taking negative molds, injecting photosensitive resin, curing and molding, and polishing, not only the production time is long, but also the cost is high. High, and because the whole process is done by hand, although the fit to the human ear is better than that of non-customized hearing aids, there are still certain errors. Due to the low strength of the photosensitive resin, the shell of the hearing aid should not be too thin. Therefore, for the small deep ear canal hearing aid, there are certain difficulties in the installation of electronic components. In addition, due to the general biocompatibility of photosensitive resins, long-term wearing is likely to cause allergic reactions.

Utility model content

The purpose of this patent is to overcome the shortcomings of the prior art and provide a customized hearing aid that is comfortable to wear, not easy to fall off, good sound insulation, good biocompatibility and high strength.

The technical solution adopted by the utility model is: a 3D printing customized hearing aid, including a shell, a cover and electronic components, the inside of the shell is provided with a cavity for accommodating the electronic components, and at least a part of the side wall of the shell is consistent with the shape of the inner cavity of the ear canal The structure is the same, the electronic components include battery compartment, battery module, amplifier, receiver, microphone and control module. There is an inner end surface with a sound hole, the battery compartment is connected to the cover, the battery module is connected to the battery compartment, a receiver is provided at the sound hole, the receiver is connected to the amplifier, the amplifier is connected to the microphone, and the microphone is set in the cover. at the sound hole on the cover.

Further, the control module includes an input signal processor, a shunt device, a signal processing device, an integration device and a combined output device, the battery module is connected to the control module, the amplifier is connected to the control module, the microphone is connected to the control device, and the receiver is connected to the control module.

Further, the casing is a titanium or titanium alloy casing.

Further, the outer end is provided with an edge sealing extending from the outer edge to the inside for connecting the electronic components, and the edge sealing is connected to the cover through a buckle, and the edge sealing is provided with a vent hole that extends toward the inner end surface and penetrates the inner end surface .

Further, volume control keys and pull wires are also arranged on the cover.

Further, the cover is provided with a connection hole for placing the battery compartment, opposite connection ears are provided on both sides of the connection hole, and a rotating shaft for connecting the battery compartment is provided between the connection ears.

Further, one end of the battery compartment is provided with a hook, and the hook is hung on the rotating shaft. A bar-shaped protrusion is provided on the opposite side of the hook on the battery compartment, and a step gap is provided at the connection corresponding to the bar-shaped protrusion on the cover. , the strip-shaped protrusion is stuck in the seam between the steps.

Further, a cylindrical protrusion is provided on the inner wall of the housing, and the cylindrical wall surface of the cylindrical protrusion is joined and integrated with the inner wall of the housing.

Further, a cylindrical cavity for accommodating batteries is provided inside the battery compartment, and a switch facing outside is provided on the outer wall of the battery compartment.

Further, the gap between the steps is formed by two upper and lower steps, and the strip-shaped protrusion includes a strip-shaped protrusion between the two steps and a slope surface, and the slope surface overlaps with the lower step surface on the gap between the steps.

The 3D printing customized hearing aid involved in the utility model adopts pure titanium metal or titanium alloy material to make the shell, which is customized by 3D printing technology, and can realize a thin-walled shell, and the inside of the shell can prevent multiple electronic components, so that people can wear it Comfortable and convenient for the installation of electronic components. Due to its strong fit, the wearer can experience stable sound transmission with clearer sound quality.

Description of drawings

Fig. 1 is a structural diagram of a hearing aid in Embodiment 1 of the present utility model;

Fig. 2 is a diagram of the internal structure of the hearing aid of Embodiment 1 of the present utility model;

Fig. 3 is a structural diagram of injection ear impression paste in Example 1 of the present utility model;

Fig. 4 is a cover structure diagram of Embodiment 1 of the present utility model;

Fig. 5 is a structural diagram of the battery compartment connection cover in Embodiment 1 of the present invention;

Fig. 6 is a structural diagram of the battery compartment of Embodiment 1 of the present utility model;

Fig. 7 is a structural diagram of the ventilation hole of Embodiment 1 of the utility model;

In the figure: 1-housing; 2-cover; 3-sound hole; 4-volume control key; 5-battery compartment; 6-pull wire; 7-eardrum; 8-ear barrier; Ear impression paste; 11-syringe; 12-amplifier; 13-receiver; 14-connection line; 15-microphone; Column-shaped protrusion; 51-hook; 52-bar-shaped protrusion.

Detailed ways

The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the following described embodiments are some embodiments of the utility model, rather than all implementations Examples are only used to illustrate the utility model, and should not be considered as limiting the scope of the utility model. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Example 1

As shown in Fig. 1 and Fig. 2, hearing aid comprises housing 1, cover 2, battery compartment 5, battery module, amplifier 12, receiver 13, microphone 15 and control module, battery compartment, battery module, amplifier, receiver, microphone The control module and the control module belong to the electronic components arranged in the shell, and the inside of the shell is provided with a cavity for accommodating the electronic components. The end is provided with an inner end surface, and the inner end surface is provided with a sound hole 18, the battery compartment is connected to the cover 2, the battery module is connected to the battery compartment 5, a receiver 13 is provided at the sound hole 18, and the receiver 13 is connected to the amplifier. The amplifier 12 is connected to a microphone 15 which is arranged at the sound hole 3 in the cover.

As shown in Figure 3, the hearing aid involved in this patent is a customized hearing aid realized by 3D printing technology. The shape of the shell is formed according to the shape of the inner ear of the demander. The shell of the hearing aid fits the inner ear and adapts to the shape of the inner ear. structure. The shape of the shell is obtained by simulating the shape of the ear impression paste 10. In FIG.

The control module includes an input signal processor, a shunt device, a signal processing device, an integration device, and a combined output device. The battery module is connected to the control module, the amplifier is connected to the control module, the microphone is connected to the control device, and the receiver is connected to the control module.

The hearing aid housing 1 is made of titanium or titanium alloy, or magnesium-aluminum alloy, but in order to realize the biocompatibility of magnesium-aluminum alloy, the surface of magnesium-aluminum alloy should be provided with a fluorine coating.

The outer end is provided with an edge sealing extending inward from the outer edge to connect the electronic components, and the edge sealing is connected to the cover 2 through buckles, and the edge sealing is provided with a ventilation hole 19 extending toward the inner end surface and penetrating the inner end surface.

As shown in FIG. 4 , the cover 2 is also provided with a volume control key 4 and a pull wire 6 . The pull wire is for the convenience of the user to take the hearing aid out of the ear.

The cover 2 is provided with a connection hole for placing the battery compartment, opposite connection ears are arranged on both sides of the connection hole, and a rotating shaft 16 for connecting the battery compartment 5 is arranged between the connection ears, and the battery compartment 5 is connected in the square hole.

As shown in Figure 5 and Figure 6, one end of the battery compartment 5 is provided with a hook, and the hook is hung on the rotating shaft 16. The opposite side of the hook 51 on the battery compartment 5 is provided with a bar-shaped protrusion 52, and the cover is connected to the bar-shaped protrusion. 52 is provided with a gap between the steps at the corresponding connection, and the strip-shaped protrusion is stuck at the gap 17 between the steps.

As shown in FIG. 7 , a cylindrical protrusion 20 is provided on the inner wall of the housing 1 , and the cylindrical wall surface of the cylindrical protrusion 20 is joined and integrated with the inner wall of the housing.

A cylindrical cavity for accommodating batteries is arranged inside the battery compartment 5 , and a switch facing outside is provided on the outer wall of the battery compartment 5 .

As shown in Figure 6, the gap between the steps 17 is composed of two steps up and down, and the strip-shaped protrusion 52 includes a strip-shaped protrusion and a slope surface between the two steps, and the slope surface and the step below the gap 17 between the steps face overlapping.

The specific production methods can include two types: the first one is to make a preliminary cut after taking the mold of the eardrum, scan the ear mold with a 3D scanner, then use 3D software to design and optimize the shell, and use a 3D metal printer to print after the model is designed , After the printing is completed, complex post-processing work is carried out. After the shell processing is completed, the components are assembled, and finally the performance test of the hearing aid is carried out. Only after passing the test can it be worn and used.

The second is to perform 3D reconstruction of the medical image data of the hearing-impaired person to obtain the 3D data of the ear canal, and then use 3D software to design and optimize the hearing aid shell based on the reconstructed 3D data, and then print the model with a 3D metal printer , After the printing is completed, complex post-processing work is carried out. After the shell processing is completed, the components are assembled, and finally the performance test of the hearing aid is carried out. Only after passing the test can it be worn and used.

The casing 1 is a titanium metal casing, and the titanium metal can form a thinner casing wall, and the thinner casing wall can obtain a larger cavity, and the cavity is used to accommodate other equipment of the hearing aid.

Shell 1 is made of titanium material through the intelligent manufacturing method of SLM (Selected Laser Melting). The material is medical titanium powder. After rigorous testing and screening, the biocompatible material that meets human needs is finally selected. After modeling and design, make a hearing aid model that conforms to the ear structure of the hearing-impaired. After optimization and slicing before printing, the sliced file is imported into the metal printer with set parameters, and the plane geometric information sliced by each layer of the CAD model Generate the CNC movement instructions of the X-Y laser scanner on each layer of powder, the powder spreader spreads the powder layer by layer on the forming platform, and rolls and compacts the powder. The thickness of each layer of powder is equal to the slice thickness of the CAD model Consistently, each layer of powder is selectively sintered on the substrate by a laser scanner, and each time a layer is sintered, the substrate is lowered by one layer until the entire hearing aid shell is sintered. The hearing aid shell made by SLM has strong comprehensive functions, reduces production time and manpower, improves material utilization rate, and saves direct costs; the production process is more flexible; it can be printed out quickly, reducing inventory and mobilizing funds; no expensive Production equipment.

Cover 2 has a unique notch-shaped design, which fits perfectly with the hearing aid shell, which not only facilitates the installation of internal components, but also closely fits with the shell, effectively preventing moisture and other impurities from entering the hearing aid and causing damage to the hearing aid.

The battery compartment 5 is located on the cover, and the bottom is designed as a ring. The battery can be taken and placed by special tools. Its unique buckle design makes it closely fit with the cover, but also looks small and secret.

The volume control key of the hearing aid is located on the cover 2. It adopts a "one" shape design. Use a special tool to adjust the volume. Rotate clockwise to increase the volume, and rotate counterclockwise to decrease the volume.

The pull wire 6 is located on the cover 2 and is a thin transparent plastic wire with a ball at one end to facilitate the removal of the hearing aid.

The vent hole 19 is located at the edge away from the ear canal end, and its size mainly depends on the balance between howling and ear plugging and the size of the ear canal.

The control module of the hearing aid includes an input signal processor, a shunt device, a signal processing device, an integration device, and a combined output device. This hearing aid is an all-digital hearing aid, and its circuit adopts a logic circuit, which can quickly process complex sound signals. It can divide its own spectrum range into multiple frequency bands for separate adjustment, so as to compensate for the different hearing losses of the hearing-impaired in different frequency bands. It can also distinguish speech from noise, realize the effect of strengthening speech and reducing noise, and meet the actual needs of the hearing-impaired to the greatest extent.

The functions that the electronic component of the present invention can realize are as follows: Microphone-the function is to convert the input acoustic signal into an electrical signal; input signal processor-responsible for converting the electrical signal into a digital signal; the shunt device is responsible for dividing the digital signal into multiple signals Processing channel; signal processing device - has the ability to process signals independently, flexibly and reasonably; integration device - can combine signals from different channels into high and low frequency parts for calculation; high and low frequency signals completed by the previous calculation Combined, digitally output; Receiver - responsible for restoring the electrical signal to an acoustic signal.

The 3D printing customized hearing aid shell involved in the utility model is designed and manufactured according to the hearing loss of the hearing impaired and the physiological structure of the ear. Its shape can be customized and designed according to the needs of the hearing-impaired, and its basic feature is small and stealthy. The shell is a 3D printed titanium alloy shell, which is custom designed and manufactured according to the physiological characteristics of the ears of the hearing-impaired. Compared with traditional hearing aids, the installation of components is smaller, more concealed and comfortable to wear, and not easy to fall off. Its control module adopts digital modules, which can automatically adapt to the environment, effectively reduce noise, eliminate feedback sound, and improve sound quality. Naturalness, authenticity and comfort, improve the clarity of speech and improve the wearer's language discrimination ability. The setting of the vent hole helps to change the frequency response of the hearing aid, balance the pressure in the ear, maintain the ventilation between the ear canal and the outside world, reduce the ear blocking effect, and reduce the low-frequency gain.

The utility model is not limited to the above-mentioned optional embodiments, and anyone can draw other various forms of products under the enlightenment of the utility model, but no matter any changes are made in its shape or structure, anyone who falls into the utility model The technical solutions within the scope defined by the claims all fall within the protection scope of the present utility model.

Claims (10)

1. A 3D printing customized hearing aid, characterized in that: it includes a shell, a cover and electronic components, the inside of the shell is provided with a cavity for accommodating the electronic components, and at least a part of the side wall of the shell has the same shape and structure as the inner cavity of the ear canal , the electronic components include a battery compartment, a battery module, an amplifier, a receiver, a microphone and a control module. There is an inner end surface with a sound hole, the battery compartment is connected to the cover, the battery module is connected to the battery compartment, a receiver is provided at the sound hole, the receiver is connected to the amplifier, the amplifier is connected to the microphone, and the microphone is set in the cover. at the sound hole on the cover. 2. The 3D printing customized hearing aid according to claim 1, characterized in that: the control module includes an input signal processor, a shunt device, a signal processing device, an integration device and a combined output device, the battery module is connected to the control module, and the amplifier The control module is connected, the microphone is connected to the control device, and the receiver is connected to the control module. 3. The 3D printing customized hearing aid according to claim 1, characterized in that: the shell is a titanium or titanium alloy shell. 4. The 3D printing customized hearing aid according to claim 1, characterized in that: the outer end is provided with an edge sealing extending from the outer edge to the inside for connecting the electronic components, and the edge sealing is connected to the cover through a buckle. Ventilation holes extending along the inner end surface and penetrating the inner end surface are provided on the sealing edge. 5. The 3D printing customized hearing aid according to claim 1, characterized in that: the cover is also provided with a volume control key and a pull wire. 6. The 3D printing customized hearing aid according to claim 1, characterized in that: the cover is provided with a connecting hole for placing the battery compartment, connecting ears with relative values are arranged on both sides of the connecting hole, and there are connecting ears between the connecting ears. Connect the hinge of the battery compartment. 7. The 3D printing customized hearing aid according to claim 6, characterized in that: one end of the battery compartment is provided with a hook, the hook is hung on the rotating shaft, and the opposite side of the hook on the battery compartment is provided with a bar-shaped protrusion , a step gap is provided on the cover corresponding to the joint of the strip-shaped protrusion, and the strip-shaped protrusion is stuck in the gap between the steps. 8. The 3D printing customized hearing aid according to claim 1, characterized in that: the inner wall of the housing is provided with a cylindrical protrusion, and the cylindrical wall surface of the cylindrical protrusion is integrated with the inner wall of the housing. 9. The 3D printing customized hearing aid according to claim 1, characterized in that: the battery compartment is provided with a cylindrical cavity for accommodating the battery, and the outer wall of the battery compartment is provided with a switch facing the outside. 10. The 3D printing customized hearing aid according to claim 7, characterized in that: the seam between the steps is composed of two upper and lower steps, and the strip-shaped protrusion includes a strip-shaped protrusion and a slope surface between the two steps , the slope surface is superimposed on the lower step surface on the step gap.