Variable hearing protection
Reference to related applications
This application claims the priority of
Swiss Patent Application 0040/08, filed Jan. 11, 2008, the entire disclosure of which is hereby incorporated by reference.
Field of the invention
The invention relates to a variable hearing protection for insertion into the ear canal.
Devices of this type serve to adapt the hearing sensitivity of a person as needed to the respective requirements and circumstances.
From DE 103 24 763 a variable hearing protection is known, which has a flexible Einpasskörper for insertion into the ear canal. Through the Einpasskörper a channel extends through which the sound can reach the eardrum. In the channel an aperture with an opening is arranged. The opening can be closed by turning a closure part arranged in the channel.
This solution has the disadvantage that the opening of the closure part may be associated with loud cracking, since when opening a relatively sudden pressure equalization can take place. In addition, dirt can accumulate in the opening, which make it difficult to operate the device. Presentation of the invention
It has as its object to provide an ear protection of this kind, which at least partially reduces these disadvantages.
This object is achieved by the hearing protection according to claim 1. Accordingly, two mutually rotatable barrier parts are provided. The first barrier part has an opening. The second barrier member has a disk which covers the entire channel, i. which extends over the entire cross section of the channel. The disc has several areas of different thickness, which have different strong transmission for the sound. By rotating the barrier members against each other, the aperture can be selectively made to coincide with regions of different thickness, whereby the attenuation of the sound passing through the aperture can be varied.
By using a disc which extends over the entire cross-section of the channel, on the one hand sudden pressure equalization processes can be avoided, and on the other hand the disc also serves as contamination protection and prevents the passage of impurities. The hearing protector has a male body, preferably of deformable material, through which said channel extends. This male body can be sealingly inserted into the ear canal of the user. This may be a shaped body individually adapted to the respective user, or a body that is dimensioned and designed to adapt to different auditory canals. Brief description of the drawings
Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to FIGS. Showing:
1 is a view of a first embodiment of the invention (handle not shown),
2 shows a section through the adjusting mechanism of the embodiment of FIG. 2,
3 is a section along line III-III of Fig. 2,
Fig. 4 is a view of the embodiment of FIG. 2 from below, Fig. 5 is a section along line V-V of
Fig. 2 and
Fig. 6 is a section through a second embodiment of the invention.
Ways to carry out the invention
The hearing protection according to FIG. 1 to 5 has a Einpasskörper 1, which can be inserted into the ear canal of the user. Preferably, as mentioned, the male body 1 is made of deformable material so that it adapts well to the course of the ear canal and can be sealingly inserted into it. In the embodiment of Fig. 1 is a Einpasskörper 1, which is adapted in shape to a particular user. Passing body 1 is omitted in the figures 2-5 for the sake of clarity.
Through the Einpasskörper 1 extends a channel 2, which - as normally not visible from the outside - is shown in Fig. 1 in thinner lines. In the channel 2, an adjusting mechanism 3 is arranged, which has the task of attenuating the passing through the channel 2 passing sound in user-selectable manner.
The construction of the adjusting mechanism 3 can be seen in particular from FIGS. 2 to 5. He has a e.g. cylindrical tubular frame 4, which is connected on its outside with the Einpasskörper 1, e.g. firmly connected or held with frictional engagement. The frame 4 is preferably made of a harder material than the Einpasskörper. For example, the fitting body 1 is made of a foam, while the frame 4 is made of plastic or metal.
The frame 4 is arranged coaxially about a rotation axis 5 of the device. Also coaxial with the axis of rotation 5, a pivot pin 6 is mounted, which is connected to an out of the ear canal coming to rest handle 7.
The pivot pin 6 is mounted on the lower in Fig. 2 end of the adjusting mechanism in a first pivot bearing 9, which is connected via a plurality of radially extending to the axis of rotation 5 struts 10 with the frame 4. Thus remain between the struts 10 spaces 11 through which the sound can occur.
The pivot pin 6 is further rotatably mounted in a second pivot bearing 12. The second pivot bearing 12 is connected to the frame 4 via a first barrier part 13.
The first barrier part 13 extends over the entire cross section of the channel 2 and closes it up to the region of an opening 15, which is e.g. essentially takes the form of a circular sector
(see Fig. 5). The first barrier part 13 is firmly connected to the frame 4 in the first embodiment. Next, a disc 16 is provided in the adjusting mechanism 3, which forms a second barrier part together with the pivot pin 6 and the handle 7. The disc 16 is circular and adapted to the diameter of the channel 2 in the region of the adjusting mechanism 3. It is perpendicular to the axis of rotation 5, extending from pivot pin 6 to the frame 4 and is fixedly connected to the pivot pin 6, while they can rotate relative to the frame 4 and the first barrier member 13 about the axis of rotation 5, when the handle 7 is actuated accordingly becomes. The disc 16 is arranged substantially immediately adjacent to the barrier part 13, so that it rests on the edge of the opening 15 from above.
The disc 16 is, as seen in FIG. 3, four sectors in the present embodiment
18a, 18b, 18c, 18d split. These sectors each have different thickness, as shown in Fig. 2 for two of the sectors. By rotating the disc 16, each of the sectors 18a, 18b, 18c, 18d can be brought into coincidence with the opening 15. Depending on which of the sectors is brought to coincide with the opening 15, so a more or less large attenuation of the sound can be achieved because the different thickness sectors 18a, 18b, 18c, 18d attenuate the sound to different degrees. In order to obtain a large difference between the individual settings, the thinnest of the sectors 18a-13d should be substantially thinner than the first barrier part 13.
In order to facilitate the user a correct adjustment of the adjustment mechanism 3, at least one of the barrier parts, in this case the second barrier part, is equipped with a latching mechanism. This is formed in the embodiment of FIGS. 1-5 by one or more knobs 18 on the outer edge of the disc 16, which can snap into corresponding recesses 19 on the inside of the frame 4, when one of the sectors 18a - 18d exactly in line with the Opening 15 is.
Fig. 6 shows an embodiment of the hearing protection with a Einpasskörper 1, which is not tuned to a particular auditory canal, but can adapt its shape to different auditory canals. For this purpose, the Einpasskörper 1 is provided with circumferential, flexible slats 20, which can fit the course of the ear canal to <[not]>.
Handle 7 is preferably configured not rotationally symmetrical, so that the user easier to exert a rotational force on pivot pin 6 and can recognize the orientation of the disc 16 from the outside. The shape of the handle 7 can be chosen from a functional and / or aesthetic point of view. In particular, the handle may be symmetrical, asymmetrical, round like a sphere, rounded, oval or even e.g. be shaped as a figure, e.g. as a vegetable or the like.
In the embodiments shown so far, the first barrier member 13 is fixedly arranged in the frame 4, while the disc 16 is rotatable. However, it is also conceivable that the disc 16 is fixedly arranged, while the barrier member 13 can be rotated with the opening 15. It is crucial that the relative position between the two parts can be changed. The parts of the adjusting mechanism 3, as mentioned, for example, be made of plastic and / or metal. It may be injection molded or otherwise manufactured parts. The different thickness sectors 18a-18d can be made by stacking four plates of different sizes, one of which covers the entire circular area, the second only 3/4 thereof, the third half and the fourth 1/4.
However, plate 16 can also be made in one piece, in particular as an injection-molded part. The adjusting mechanism comprising the frame
4 and the barrier parts attached to the frame 4 can preferably be removed as a whole from the fitting body 1 so as to clean or replace the fitting body 1 or the adjusting mechanism 3. Opening 15 in the embodiment according to FIG. 5 is sector-shaped, so that the entire surface of sectors 18a-18d can be used. However, it is conceivable, e.g. also a round, oval or other configuration of the opening 15. It can also be several, e.g. two, opposing openings may be provided in disc 16, in particular when opposite sectors 18a, 18c and 18b, 18d of the disc 16 have the same thickness - by this measure, the total area of the opening (s) 15 can be increased.
The number of sectors in disk 16 is four in the embodiment of FIGS. 1-5. However, only two, three or more than four sectors or areas of different thickness may be provided. The individual sectors can merge stepwise or continuously. It is also conceivable that the thickness of the disc 16 increases steplessly from a minimum thickness in the first sector to a maximum thickness in the last sector. In addition, the thickness within a sector need not be homogeneous - it is crucial that the average thickness of the at least two sectors is different. While preferred embodiments of the invention are described in the present application, it is to be understood that the invention is not limited thereto and may be embodied otherwise within the scope of the following claims.