JPS6230398Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates primarily to improvements in the holding portion of a wiring lead wire led out from a receiver or microphone of a hearing aid.

Hearing aids in which a microphone and a receiver are placed close to each other are prone to acoustic feedback phenomena due to sound leakage from the receiver on the output side or when the microphone picks up mechanical vibrations to the hearing aid housing, etc. . As a countermeasure to this problem, one of the microphones and the receiver is housed in a sealed room and isolated from the other. By the way, it is necessary to lead the wiring lead wire from a microphone or receiver housed in a sealed room to the outside of the sealed room, but if this lead wire is held too tightly or is held too tightly, vibrations may be transmitted through this lead wire. , which also produces an acoustic feedback phenomenon.

Therefore, in the past, a notch was provided in the wall of the sealed chamber to take out the lead wire, the lead wire was taken out from the notch, and a rubber adhesive was injected into the notch to hold the lead wire in a cushioning manner. At the same time, the notch was sealed with this adhesive. However, although this rubber-based adhesive satisfactorily serves its purpose when first used, it has had the disadvantage of impairing sealing performance due to leakage from the notch or curing shrinkage as it changes over time. Furthermore, due to curing and shrinkage, the adhesive loses its cushioning ability to hold the lead wires, making the lead wires more likely to transmit vibrations and breakage, contributing to product failure. There were problems that needed to be solved, such as the difficulty of removing the old adhesive.

In contrast, this invention uses a holding member made of a flexible elastic material such as rubber or plastic to cushion the lead wire and seal the sealed chamber.

Embodiments of the present invention will be described below with reference to the drawings.
In FIGS. 1 and 2, reference numeral 1 denotes a holding member made of a flexible elastic material such as rubber or plastic. FIG. 1 shows the normal state, and FIG. 2 shows the folded state of use. The holding member 1 is composed of a pair of opposing lead-out parts 1A and a connecting part 1B that connects the pair of lead-out parts 1A. A coupling hole 1C to be inserted is formed. The opposite end 1D of the lead-out portion 1A is formed to protrude at a certain angle. Therefore, when this holding member 1 is bent, the lead-out portion 1 is formed as shown in FIG.
The ends 1D of A will come into close contact with each other.
This contact portion constitutes a slit 1E. 2 is a receiver accommodated in a sealed chamber 4 for accommodating a receiver formed in a housing 3 of the hearing aid, and 5 is a wiring lead wire led out from the receiver 2. A notch 4B is formed in the partition wall 4A of the sealed chamber 4, and the notch 4B is provided with a coupling protrusion 4C that is inserted into the coupling hole 1C of the holding member 1 described above. Reference numeral 6 denotes a microphone arranged close to the receiver 2 through the partition wall 4A of the sealed chamber 4. In this embodiment, the receiver 2 is housed in the closed chamber 4, but as described above, the microphone 6 is also housed in the closed chamber 4.

Next, assembly will be explained. The holding member 1 is bent and installed in the notch 4 so that the coupling protrusion 4C is inserted into the coupling hole 1C.
The space is closed off, and the sealed chamber 4 is isolated from other parts. Thereafter, the lead wire 5 of the receiver 2 housed in the sealed chamber 4 is led out from the gap 1E of the holding member 1 and wired to a predetermined position on the electric circuit. Thereafter, the sealed chamber 4 is completely sealed by covering it with one of the casings 3 as an upper lid.

In the above embodiment, the holding member 1 is explained in which the pair of lead-out parts 1A are connected by the connecting part 1B in consideration of workability, and the holding member 1 is integrally constructed. However, it is not necessary to have such a structure. As shown in FIGS. 3 and 4, the lead-out portion 1A may be configured and used separately.

Further, in the above embodiment, the notch 4B was formed in the partition wall 4A at the corner of the sealed chamber 4, and the holding member 1 was bent and used. However, as shown in FIG. A notch 4B may be formed on the side surface. In this case, a rectangular holding member 1 having a slit 1E in the center is sufficient.

FIG. 6 shows consideration for increasing the degree of connection of the holding member 1 to the notch 4B. That is, a recess 1F is formed on the outer end surface of the lead-out portion 1A,
A convex portion 4 is formed on the end face of the partition wall 4A corresponding to this concave portion 1F.
D. Of course, since the unevenness only needs to exist relatively, the same effect can be achieved even if the leading-out portion 1A is provided with a protrusion and the partition wall 4A is provided with a recessed portion.

As described above, the present invention provides a notch in the bulkhead of a sealed chamber for accommodating a receiver or microphone formed in the housing of a hearing aid, and a flexible elastic member supported by the bulkhead so as to close the notch. The present invention provides a hearing aid in which a lead wire of a receiver or a microphone housed in the sealed chamber is led out through a slit formed in a holding member made of a body.

Therefore, the lead wire is held in the narrow gap indefinitely in a buffering manner, and the notch is sufficiently sealed, so that the acoustic feedback phenomenon can be adequately coped with. Moreover, unlike the conventional method, inconveniences caused by deterioration over time are eliminated, and the holding member and lead wire can be easily removed during repair, which is highly effective in practice.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the holding member according to the present invention. FIG. 2 is an exploded perspective view showing an embodiment of the present invention. FIG. 3 is a perspective view showing another embodiment of the holding member according to the present invention. FIG. 4 is a perspective view showing another embodiment of the present invention. FIGS. 5 and 6 are also perspective views showing other embodiments of the present invention. 1: Holding member, 1E: Slit, 2: Receiver,
3: Housing, 4: Sealed chamber, 4A: Partition wall, 4B: Notch, 5: Lead wire, 6: Microphone.

Claims (1)

[Claims for Utility Model Registration] A receiver 2 or a microphone 6 is housed in a sealed chamber 4 formed in a housing 3, and the receiver 2 is inserted into a notch 4B formed in a partition wall 4A of this sealed chamber 4.
Alternatively, in a hearing aid in which the lead wire 5 of the microphone 6 is pulled out, a holding member 1 made of a flexible elastic body is provided so as to close the notch 4B of the sealed chamber 4, and a slit 1E is provided in the holding member 1. A hearing aid characterized in that the lead wire 5 is drawn out from the narrow gap 1E.