Miniature auditory meatus type hearing aid

Abstract

The invention discloses a miniature auditory meatus type hearing aid. All electronic components except a receiver are wrapped in a shell, the front end of the shell is fixed to the rear end of the receiver in a sealed mode, a sound outlet of the receiver is exposed out of the shell, the receiver is wrapped with an eardrum head, the eardrum head is fixed to the front end of the shell in a detachable mode, and the sound outlet of the receiver is located in the eardrum head. The structure of the hearing aid can increase the bending degree of the part extending into the ear canal, reduce the sizeof the hearing aid, and improve the adaptability, comfort and concealment.

Description

technical field [0001] The invention relates to the technical field of hearing aids and earphones, in particular to a miniature ear canal hearing aid. Background technique [0002] A hearing aid (Hearing Aid) is a tool, device, device, and instrument that helps the hearing-impaired to improve their hearing impairment and improve their ability to communicate with others. It transmits weaker sounds to the patient's ears after amplification In the tract, so that the patient can hear the weaker sound. Hearing aids are divided into behind-the-ear hearing aids, in-ear hearing aids, and cassette hearing aids according to their shapes. [0003] The size of the hearing aid is one of the main factors that restrict the desire of end users to wear hearing aids. At present, most ear canal hearing aids are still relatively large in size, which affects the wearing comfort and concealment of end users. At the same time, the occasional ear-piercing and sharp howling sound will easily redu...

AI Technical Summary

Problems solved by technology

[0006] 1. The ear canal of the human ear has a curvature similar to a turn, that is, the turning point. If the shape of the hearing aid is relatively straight, it will touch this turning point when it is worn into the ear canal, which is easy to sting and cannot be worn deeper.

Usually, in-ear hearing aids are bent at a certain angle to fit the curvature of the ear canal, so that the hearing aid can be worn deeper. The bending point of the body is designed near the installation position of the receiver, so that both ends of the shell at the bend are longer, which limits the bending angle of the hearing aid. If the angle is too large, the hard plastic shell will The mold cannot be processed. Therefore, the existing in-ear hearing aids either have a small bending angle and cannot go deep into the ear canal. The shell of the plastic part is split into two halves along the center line and formed separately, and then the separated hard plastic shells are bonded together by means of glue, so as to achieve the purpose of bending the front end (ear part) of the hard plastic part at a larger angle. However, in view of the extremely small size of the hearing aid product as a whole, this kind of glue bonding cannot be done by mechanical equipment, but can only be done manually. The labor cost is high, the production efficiency is low, and the product quality is not stable. At the same time, there are glue failure, glue pollution and glue failure. Risk of sensitization from skin irritation

[0007] 2. In traditional in-ear hearing aids, the receiver is completely wrapped on the front end of the hard plastic shell, and then the soft rubber eardrum head is wrapped on the outside. Although the soft rubber eardrum head can improve wearing comfort and properly reduce sound waves passing through the hard plastic shell The anti-whistling feedback effect produced by solid body conduction (sound leakage of components, mutual interference between the receiver and the microphone has not yet been resolved), but the front-end volume of the hearing aid is increased in disguise, making it difficult for the hearing aid to penetrate into the ear canal and narrowing the number of suitable people. , also resulting in poor concealment

[0008] 3. The receiver and microphone of traditional in-ear hearing aids are wrapped together in a hard plastic shell, and there are sound leakage of components, mutual interference between the receiver and microphone, and feedback whistle caused by sound waves passing through the solid conduction of the hard plastic shell. , there is harsh and sharp sound, which not only reduces the user experience, but also increases the maintenance cost of hearing aid manufacturers

[0009] 4. Since the receiver is wrapped in a hard plastic shell, the end user wears it for a long time, and the cerumen or oil stains in the ear canal enter the sound outlet of the receiver through the small holes of the cerumen mesh, and accumulate with long-term wear More and more, thus blocking the sound outlet of the receiver, making it impossible for the user to use the hearing aid normally, and it is not hygienic

The hard plastic shell is fixed by glue and other processes, and the user cannot clean it by himself. He must hand over the hearing aid to professionals to remove the shell and clean it, resulting in huge labor costs and a long waiting period.

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