JPS62285600A - Hearing aid fitted in ear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] This invention relates to in-the-ear hearing aids.

[Prior Art] A pear-shaped case is provided, the case having an outer bulbous head with a flat end face attached to an end plate, and an inner narrow tail, wherein the long sleeve line of the tail is connected to the case. In-the-ear hearing aids are already known, in which two mutually orthogonal longitudinal sections intersect at an angle to the normal to the flat end surface of one head.

[Problems to be Solved by the Invention] It is an object of the invention to provide a hearing aid of the above-mentioned type, the shape of which approximately corresponds to the shape of a normal average auditory canal.

[Means for solving the problem] This object is based on the invention, so that the angle between the normal of the flat end face and the long axis of the tail is 135° on one longitudinal section.
This is achieved by being in the range of 2i-142°.

Advantageous embodiments are described in the subclaims.

The shape is optimal when the angles are set corresponding to the features according to claims 4 and 6.

[Embodiment] Next, the present invention will be described in detail with reference to drawings showing an embodiment of an in-the-ear type hearing aid based on the present invention.

FIG. 1 shows an in-the-ear hearing aid l with a case 2, which has a projection 3 with a thread 4 at its inner end. The diameter of the protrusion 3 is d. The hearing aid module l has a curved end plate 5 with an adjustment knob 6 for the volume regulator, which can also serve as an on-off switch for the hearing aid, another adjustment element 7, a pocket 8 for the battery and a hole for the introduction of sound. It is equipped with 9.

The hearing aid module 1 can be fitted into the hollow interior 10 of the ear-shaped earplug 11, and the protrusion 3 passes through the first hole 12 and projects into the second hole 13 of the ear-shaped earplug 11. It is supposed to be done. In this case, the ear-shaped earplug 11 has a jacket 14 made of a transparent material, for example polymethyl methacrylate, such as acrylic PMMA, and on top of this jacket a likewise transparent material, for example polymethacrylate, such as acrylic PMMA. It is covered with an original ear-shaped earplug material 15 consisting of methyl acid. The diameter of the first hole 12 is likewise d, or at most slightly larger, so that the projection fits snugly into the first hole 12. The diameter of the second hole 13 is D.

On the part of the protrusion 3 that projects into the second hole 13, an earwax camp 16 with an internal thread 17 can be screwed. The diameter p+ of the earwax camp is somewhat smaller (preferably 0.2 mm smaller) than the diameter of the second hole 13. The earwax cap can therefore be easily screwed into the hole 13 until it abuts against the annular edge 18 of the jacket 14. Thereby, the in-the-ear hearing aid module l is installed in the finished ear-shaped earplug 11 in an acoustically tight manner.

The earwax cap 16 has a sieve-like hole 20 in its end face 19, as shown in FIG. The earwax cap thereby serves at the same time for fixing the module and as an earwax trap. Furthermore, the earwax cap 16 has two holes 21 and 22 passing through it, which holes are aligned with the center axis 23 of the cap.
In order to screw in the cap, a not shown spanner with two pins engages in these holes, which are arranged approximately diametrically opposite each other.

An air vent groove 24 is machined into the ear-shaped earplug 11.

3 and 4 show the cross-sections -m and IV-IV implied in FIG. 1 through the case 2 of the hearing aid module l when the curved end plate 5 is removed.

As can be seen in FIGS. 3 and 4 (as well as in FIG. 1), the case 2 of the hearing aid module l is of pear-shaped construction. Accordingly, this case has an outer convex head 25 and an inner narrow tail 26. The flat end surface of the head 25 is designated at 27. The flat end surface 27 has a normal 28 .

Beside the flat end face 27, a hook 29 is provided on the flat end face 27 of the case 2 of the hearing aid module 1 for securing the curved end plate 5, which is shown separately in FIG. .

A protrusion 3 having a sound emitting hole 30 is provided at the lowermost end of the inner narrow tail 26 .

The long axis of the tail section 26 is designated by the numeral 31.

As can be seen from FIG. 3, the angle α between the normal 28 of the flat end surface 27 and the long sleeve line 31 of the tail 26 is equal to
For (2), α=140°.

As can be seen from FIG. 4, the angle β between the normal line 28 and the long sleeve line 3 is β=14° on the longitudinal section IV-ff.

This particular angle setting results in a case shape that is tailored to the average normal ear canal of a hearing-impaired person. The case therefore automatically adapts to almost any ear canal of somewhat normal shape. Thereby, only the remaining personal adaptations need to be made using the ear-shaped earplugs 11. It is no longer necessary to specifically adapt the case to the auditory canal of each individual ear.

Furthermore, in FIG. 4, the maximum diameter of the flat end face 27 of the housing 2 is designated by the symbol DI. The maximum diameter of the narrow tail 26, which in the illustrated case is essentially rectangular in cross-section (see FIG. 1), is designated by D2.

The compatible diameters DI and D2 are selected such that the smaller diameter D2 is less than half the larger diameter D1.

In the actual example, the ratio of compatible diameters DI and D2 is Dl:D2
Stand 2.3: l'.

The inner narrow tail 26 is therefore significantly thinner than the outer bulbous head 25 of the case 2 of the hearing aid module l.

The ear-shaped earplug 11 formed from the outer jacket 14 and the ear-shaped earplug material 15 can be relatively thick when the case 2 is of this size. However, this makes it possible to post-process the air vent groove 24 in any desired shape without any problems.

FIG. 5 shows a curved end plate 5 that can be placed over the flat end face 27 of the case 2, the end plate 5 being provided with a hook groove 32 for attachment to the flat end face 27 of the case 2, The hook 1 is held in place by a stopper 29 in this groove. Thereby, the end plate is securely held on the flat end surface of the case 2.

Furthermore, as shown in FIG. 5, the curvature of the end plate 5 is rounded in all directions. There are therefore no sharp edges or edges that may appear as a cosmetic nuisance after the finished hearing aid has been inserted into the auditory canal of a hearing-impaired person.

[Brief explanation of drawings]

FIG. 1 is an exploded arrangement view of an embodiment of an in-the-ear hearing aid according to the present invention, FIG. 2 is a front view of the earwax cap shown in FIG. 1, and FIGS. 3 and 4 are shown in FIG. 1, respectively. A cross-sectional view of the case along cutting lines m-■ and IV-IV, Figure 5 is
It is a side view including a cross section of a part of the end plate shown in the figure. DESCRIPTION OF SYMBOLS 1... In-the-ear type hearing aid module, 2... Case, 5... End plate, 25... Head, 26... Tail, 27... Fist end surface.

Claims (1)

[Claims] 1) a pear-shaped case, the case having an outer bulbous head with a flat end surface attached to an end plate and an inner narrow tail, the length of the tail being In in-the-ear hearing aids whose axes intersect at an angle to the normal to the flat end surface of the head on two mutually orthogonal longitudinal sections of the case, the plane of the flat end surface (27) The angle (α) between the line (28) and the long axis (31) of the tail (26) corresponds to one longitudinal section (III
-III) An in-the-ear hearing aid, characterized in that the angle is between 135° and 142°. 2) Normal (28) and tail (26) of flat end surface (27)
according to claim 1, characterized in that the angle (β) between the longitudinal axis (31) and the long axis (31) of the hearing aid. 3) The hearing aid according to claim 1, wherein the angle (α) on one longitudinal section is in the range of 140°±1°. 4) The hearing aid according to any one of claims 1 to 3, characterized in that the angle (α) on one longitudinal section is 140°. 5) The hearing aid according to claim 2, characterized in that the angle (β) on the other longitudinal section is in the range of 14° ±1°. 6) The hearing aid according to claim 2 or 5, wherein the angle (β) on the other longitudinal section is 14°. 7) Any one of claims 1 to 6, characterized in that the maximum diameter (D2) of the tail (26) is at most less than half the maximum diameter (D1) of the head (25). Hearing aids listed in section. 8) According to claim 7, the maximum diameter (D2) of the tail (26) is approximately one-fourth to one-fifth of the maximum diameter (D1) of the head (25). hearing aids. 9) Hearing aid according to claim 7 or 8, characterized in that the narrow tail (26) has a substantially rectangular cross section. 10) A head with a flat end face to which an end plate is attached, the end plate (5) being roundly curved in all directions. Hearing aid according to any one of the above.