DK149790B - CONDUCTOR BUTTON FOR BONE HEARING GLASSES - Google Patents

Description

149790

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bone-inducing conductor button and, moreover, of the type specified in the preamble of claim 1, wherein the conductor button is connected to the anchor plate in an electric vibrator and transmits the anchor plate oscillations to the human mastoid.

Such bone hearing aids are preferably used in all cases of heavy hearing where the inner ear is intact, but where it is not possible to use a hearing aid with sound transmission in air in the normal way. The reasons for this may be, for example, that a middle ear device is inadequate after a radical operation, or a constant ear discharge in chronic middle ear inflammation.

In principle, a hearing aid with bone conduction provides no air noise, but vibrations which are in line with sound vibrations and which are transmitted to the mastoid. From here, the transmission to the inner ear of sound in solid matter occurs through the bones of the skull.

2 T49790

The generator built into the bone goggles is therefore an electromagnetic vibrator and the anchor of this vibrator is firmly connected to the conductor button mentioned above. Such a round or square conductor button protrudes from the instrument, and when the hearing glasses are worn, the button abuts against the mastodium behind the ear. A certain system pressure is required for the correct function, and the pressure is usually between 50 and 200p. To keep the surface pressure low and to ensure a comfortable wear of the glasses as well as possible have relatively large and square conductor buttons (about 10 x 20 mm) has been launched in the recent past with good results.

A disadvantage of these large conductor buttons, however, is that the adjustment of the bone goggles must be done with particular care. Thus, if the button does not touch the mastoid all over the surface, but only at one corner or one edge, then the sound transmission will not only become weak and impaired, but a considerable amount of unwanted air noise will also be emitted leading to acoustic feedback and thus making the whole adjustment questionable.

In principle, in any bone goggles there will be some limited possibility of adjusting the conductor button, since the vibrator must necessarily be resiliently suspended, not only in order to be able to swing, but also to avoid acoustic feedback in the form of transmission of oscillations through the eyeglass frame to the one placed therein. microphone.

From US Patent Nos. 2,858,376 and 3,030,456, examples of such elastic suspensions are known, which, however, allow only very small relative movements of the vibrator and conductor button as a whole relative to the spectacle frame. A greater adaptability could possibly be achieved with this technique by performing the suspension very softly and with greater mobility. However, since the anchor plate and the conductor knob are firmly interconnected, this would require a substantially larger housing for the anchor plate to swing freely in any position without impact. This is unfortunate considering that as compact a design as possible is of crucial importance, not least in connection with hearing glasses.

For example, it is also known from United States Patent No. 3,665,122 to mount the entire unit formed by conductor button, anchor plate and vibrator pivotally about an axis in an eyeglass rod. Thereby, »1Λ9790 3 is obtained a certain adaptability, which, however, remains insufficient, since adjustments can only be made in a single plane at turns around that axis.

Accordingly, with the known designs mentioned above, it is important and necessary for the hearing aid acoustic to carefully bend the rear end of the spectacle bracket in order to achieve an accurate fit to the individual head shape of the wearer. This after-bending is carried out in a similar manner as in the case of an optical spectacle after softening of the plastic material from which the hoop is made, by means of a hot air blower. This post bending is a difficult and time-consuming procedure that requires a certain amount of handling and practice in the handling of such devices. There is also a risk that the shackle will break rather than bend or that the plastic material will burn and parts of the built-in electronics be damaged as a result of excessive heat supply.

In view of the foregoing, the object of the present invention is to provide a mounting of the conductor knob, by means of which the knob can be adjusted in all necessary operating positions without the need for post-bending of the spectacle bracket, and by which efficient transmission of vibrations with a compact construction is achieved.

In order to achieve this purpose, the conductor button according to the invention is characterized by the characterizing part of claim 1. The conductor button is thus attached to the vibrator in such a way that the button can be pivoted a certain angle in all directions from a neutral position, but nevertheless the button remains in an effective vibration transmitting connection with the vibrator.

With a particularly simple embodiment of the invention set forth in claim 2, it is sufficient that the spectacle bracket or spectacle arm is bent or shaped during manufacture in such a way that the equipment fits an "average head". Adjustments to the user's main form can then be made simply by loosening a screw, by adjusting the conductor knob as necessary and by retightening the screw. Thus, a heating of the spectacle bracket for the purpose of bending it as well as the associated possibilities for damage to the equipment has lapsed.

A further embodiment of the invention set forth in claim 3 is particularly convenient as the adjustment of the conductor U9790 4 button is very simple.

With the embodiment according to claim 4, it is achieved that the conductor button automatically takes the optimum position when the glasses are put on and an adjustment of the button is unnecessary. However, for persons who have the habit of wearing and wearing glasses frequently, it may be advantageous to use measures such as those set out in claims 5 and 6.

In the following, the invention will be explained in more detail from embodiments and with reference to the drawing, in which figures 1-4 show conductor buttons according to the invention and their fastening elements seen in cross section.

Figure 1 shows that a cylindrical base part 1 of the conductor knob 2 has a bevel 3. The mounting on the vibrator anchor plate 4 is done by means of a screw 5 and with a wedge disc 6 as a spacer. The screw 5 is surrounded by a semi-elastic bushing 7, which is connected to the pivot pin with the wedge disc 6. After the screw 5 is loosened; For example, the wedge washer 6 can be rotated with respect to the conductor knob 2, and this can thus be turned a certain angle in one direction or the other from the starting position shown, so that the button takes a different angular position 1 with respect to the anchor plate 4. After tightening the screw 5 is the button 2 again firmly connected to the anchor plate 4.

Figure 2 shows another possible embodiment of the invention. In this embodiment, the cylindrical foot portion 1 of the conductor button 2 is in the form of a concave ball joint 8 along the support site, and this ball joint abuts a correspondingly convexly formed support plate 9. These parts and the anchor plate are again held together by a screw 5 and a fixed seat for the screw 5 on the conductor button 2 is obtained by means of a suitably formed support washer 10.

While the two embodiments of Figure 1, respectively. Figure 2, which usually requires multiple attempts to achieve the optimal button setting, shows Figure. 3 is an embodiment whereby the optimum position of the conductor button arises by itself upon application of the glasses. To this end, a ball sphere or disc 11 of metal is embedded in the plastic conductor button 2. A spherical head 12 of a coupling pin 13 firmly connected to the vibrator anchor plate is housed in this disc or trough 11, and the head 12 is secured against falling out by an elastic plastic retaining element 14 inserted in button 2.

Claims (2)

With this arrangement of the conductor button, it will automatically assume the optimum position against the mastoid when the glasses are put on and by pressing the rear end of the eyeglass arm and the button will remain in this position. The necessary vibration transmitting connection is obtained through the also necessary compression pressure, which presses the calothe or disc 11 firmly against the ball head 12 during use. For persons who have the habit of frequently wearing and wearing glasses, an embodiment such as that shown in Figure 3 may cause the conductor button 2 to be adjusted again and again. In such cases, a constructive solution such as that shown in Figure 4 which is substantially identical to the structure of Figure 3 can be used. Instead of the elastic retaining element 14 of Figure 3, however, a clamping plate 15 is provided which Tighten the ball pawl or washer 11 by means of screws 16, 17 and thus clamp the ball head 12 in a non-displaceable manner. For a fine-tuning of the button 2 with loosened screws 16, 17, an annular friction element 18 of cork, rubber or the like may be arranged on the clamping edge of the clamping plate 15. Other and not shown solutions are also possible. Thus, for example, the conductor button 2 may be blinded by the coupling pin 13 through a universal joint, which will also allow oscillation of the button 2 on all sides. The setting screws, if any, used can be cast with hardening wax or plastic after the adjustment has been made. Thus, the recess required for the screw head is closed and at the same time the screw is secured against loosening. A small plug of the same material as the conductor button can also be inserted. A bone-conductor conductor button connected to the anchor plate of an electric vibrator built into the rear end of the hearing-aid bracket, the conductor button transmitting the anchor plate oscillations to the human mastoid, the conductor button being movable relative to the rear end. of the brace of the eyeglasses for orienting the contact surface of the conductor button against the surface of the mastoid, characterized by the fact that the conductor button (2) is connected to the anchor plate (4) through a coupling joint (5, 13), that the conductor button (2) around the coupling link and down there is adjustable relative to the anchor-