Hearing aids

Abstract

The invention discloses a hearing aid. The hearing aid (2), in particular a behind-the-ear (BTE) hearing aid (2), comprises a base part (4) and an ear hook (6) which can be attached to the base part (4). In the assembled state, the base part (4) and the ear hook (6) are connected via a nozzle (14) and a socket (16), a sound channel (32) runs through the nozzle (14), the nozzle (14) has an outer peripheral wall (24), and the socket (16) has an inner peripheral wall (26), and, in the assembled state, a circumferential sealing ring (30) with a thickness (d) is arranged between the outer wall (24) and the inner wall (26). The sealing ring (30) is in particular located in an annular groove (28), and the inner wall (26) preferably has two reduced sections (36, 44) which compress the sealing ring (30).

Description

Technical Field

[0001] The present invention relates to hearing aids, and more particularly to a hearing aid having a base portion and a second portion attachable to the base portion. More particularly, the present invention relates to a behind-the-ear (BTE) hearing aid having a base portion and an ear hook. Background Art

[0002] A hearing aid usually has a base part with a housing, in which a microphone, a signal processing unit with an amplifier and, in some types of hearing aids, in particular BTE hearing aids, a receiver are arranged. In addition, a battery is usually provided for power supply. The microphone detects the acoustic sound signal and converts it into an electrical input signal, which is processed by the signal processing unit according to the individual hearing impairment of the hearing aid wearer (e.g. amplified according to the frequency) and supplied as an electrical output signal to the receiver, which converts it back into an acoustic sound signal and outputs it to the hearing aid wearer. For this purpose, the receiver has a sound output, to which the sound channel is connected.

[0003] In the case of behind-the-ear (BTE) devices, the base part (especially its housing) is connected to a so-called ear hook, by means of which the hearing aid can be suspended on the pinna of the hearing aid wearer. The ear hook itself has an acoustic sound channel, which is connected to the sound channel of the base part. The ear hook usually has an earpiece at its end facing away from the base part, which is placed in the ear canal of the hearing aid wearer.

[0004] A soundproof connection of the sound path is particularly important when connecting the base part to the second part, especially when connecting to the ear hook in a BTE hearing aid. If this connection is faulty, disturbing noises, such as feedback, may occur during operation, for example when the sound output signal from the receiver returns to the microphone. Such disturbing noises manifest themselves, for example, as unwelcome whistling sounds.

[0005] EP 2 278 826 B1 describes a BTE hearing aid in which a sleeve is provided as a flexible locking device for the soundproof connection between the earpiece outlet and the sound duct connected thereto, which sleeve partially slides over the earpiece and the connected sound channel.

[0006] EP 1 874 093 A2 describes a BTE hearing aid in which a receiver tube is connected to a connector by means of a plug-in connection in a soundproof manner in that the connector has a projection which engages in the inner wall of the receiver tube and holds it on the connector. Summary of the invention

[0007] Based on the above, an object of the present invention is to ensure a soundproof connection between the sound channel of the base part and the sound channel of the second part. In particular, an object of the present invention is to ensure a soundproof connection between the sound outlet of the base part and the sound channel of the ear hook attached to the base part.

[0008] According to the invention, the object is solved by a hearing aid having a base part and a second part that can be attached to the base part, in particular by a BTE hearing aid having a base part and an ear hook that can be attached to the base part. In the assembled state, that is, when the ear hook is attached to the base part, the base part and the second part are connected to each other by a connecting part. These connecting parts are a nozzle and a socket designed in a sleeve manner, into which the nozzle can be inserted. The nozzle and the socket form the ends of the corresponding sound channels of the base part and the second part, respectively. The nozzle and the socket extend along a longitudinal central axis. The nozzle can be inserted into the socket with its front end in the longitudinal direction. The nozzle and the socket each have a wall, that is, the nozzle has an outer peripheral wall and the socket has an inner peripheral wall. In order to ensure a reliable soundproof seal between the nozzle and the socket and between the two sound channels, a circumferential sealing ring, in particular a so-called O-ring, is arranged between the outer wall and the inner wall in the assembled state. The sealing ring has a defined thickness and is compressed by the opposite wall in the assembled state. This means that the O-ring is compressed by the wall in the radial direction, ie in a direction transversely or perpendicular to the longitudinal direction.

[0009] Therefore, for the purpose of sealing, an additional sealing element, i.e. a sealing ring, is arranged around the circumference of the nozzle. The sealing element is compressed and thereby clamped between the two walls, thereby ensuring a reliable seal so that sound cannot escape between the two walls.

[0010] Typically, a receiver is arranged in the base part, which has a sound outlet nozzle for emitting acoustic sound signals. The hearing aid is in particular a hearing aid in which a signal processing unit with an integrated amplifier is arranged in the base part. The signal processing unit amplifies the electrical input signal individually in each case depending on the specific hearing impairment of the user and outputs the processed signal to the receiver, which converts the electrical output signal into an acoustic signal.

[0011] Furthermore, an annular groove having a groove bottom is formed in one of the walls, and a sealing ring is inserted therein. The opposite wall (hereinafter referred to as the other wall) is spaced a certain radial distance from the groove bottom.

[0012] The radial distance is generally understood to mean the distance between the corresponding wall segment of the wall and the bottom of the groove when viewed perpendicularly to the longitudinal / central axis. Thus, the radial distance is the distance between the corresponding wall segment and the bottom of the groove in a projection plane along the longitudinal direction of the corresponding wall segment and the bottom of the groove in a common plane (i.e. the nozzle and the socket are arranged concentrically with the central axis). The socket and the nozzle are cylindrical parts, each extending along the central axis.

[0013] Furthermore, the further wall has a (first) reduction section, by which the radial distance is reduced in the longitudinal direction, and the sealing ring is radially compressed by the first reduction section when the nozzle is inserted into the socket. The further wall also has a compression section, against which the compressed seal rests in the assembled state. Therefore, the compression section is generally understood to be a wall section which, in the assembled state, directly rests against the sealing ring and compresses it radially.

[0014] In the assembled state, the reduction section is usually at least partially or completely guided longitudinally over the sealing ring. That is, when the nozzle is inserted into the socket, the reduction section slides on the sealing ring, thereby compressing the sealing ring. For example, in one embodiment, the reduction section is completely guided longitudinally over the sealing ring, so that in the assembled state it remains longitudinally downstream of the sealing ring and is not part of the compression section. According to another embodiment, in the assembled state, the reduction section remains in part of the sealing ring and is therefore part of the compression section.

[0015] The reducing section is preferably not an end face, such as an insertion ramp. Instead, another wall section preferably extending parallel to the longitudinal direction adjoins the reducing section in the direction of the front end of the nozzle or socket. In the case of the nozzle, the end face is the front end in the longitudinal direction, and in the case of the socket, the end face is the opposite rear end in the longitudinal direction.

[0016] Due to the special design of the first reducing section, the other wall thus presents a change in diameter. In the case of the outer wall, the diameter increases, while in the case of the inner wall, the diameter decreases, so that in each case the distance to the opposite wall decreases. These measures ensure that the sealing ring is compressed successively and therefore gradually when the nozzle is inserted into the socket. Therefore, the reducing section extends for a certain length, in particular inclined with respect to the longitudinal direction. In particular, the first reducing section is designed to be conical.

[0017] When the two connection parts (nozzle and socket) are joined together, the design with the annular groove (especially with the first reduced section) ensures good fit of the sealing ring in the desired position. In particular, the design of the reduced section ensures that a radial contact pressure is applied, which presses the sealing ring into the annular groove and thus prevents the sealing ring from being pressed out against the longitudinal direction.

[0018] The annular groove is preferably formed on the nozzle and on the reduced section on the socket. In principle, the opposite design is also possible. In addition, the nozzle is preferably part of the base part, and the socket is part of the second part. Here, the opposite embodiment is also possible. Therefore, the other wall is especially the inner wall of the socket. Based on this specific design variant with an annular groove in the outer wall of the nozzle of the base part, the individual functions and preferred designs are explained below, which explanations are generally also applicable to corresponding other design variants, for example, in these variants, the functions of the walls are interchanged.

[0019] In a preferred embodiment, a second reduction section is formed longitudinally downstream of the first reduction section, which second reduction section also reduces the distance in addition to the distance reduced by the first reduction section. This measure improves the sealing effect due to the additional compression. At the same time, an additional measure is taken to prevent the sealing ring from being pressed out of the annular groove. The use of a quasi-two-stage design with two reduction sections separated from each other in the longitudinal direction makes it possible to initially apply a moderate compression by the first reduction section and thus also to apply a low axial force acting against the longitudinal direction on the sealing ring. During the further insertion of the nozzle into the socket, when the second reduction section reaches the sealing ring, the sealing ring is already pressed against the bottom of the groove with a certain radial force and the second reduction section is further compressed without the risk of the sealing ring being pressed out of the annular groove.

[0020] Thus, like the first reduction section, the second reduction section leads to a change in diameter, in particular to a reduction in the diameter of the inner wall of the socket. Preferably, the diameter changes continuously and successively, whereby the radial distances decrease successively. Therefore, the second reduction section preferably also extends obliquely with respect to the longitudinal direction and is, for example, conical.

[0021] Preferably, both reduction sections are conical. In particular, they have the same design, i.e., for example, they have the same shape. In particular, this means that they have the same cone angle. As an alternative to a similar design, the reduction sections have different contours or profiles. For example, for the first reduction section, a conical design can be adopted, while the second reduction section is formed by a step in the wall, which leads to a step change in distance. An inclined course is understood to mean in particular a straight course. Furthermore, the corresponding wall in the region of the reduction section can also be curved (i.e., rounded) or have a plurality of steps.

[0022] In a preferred embodiment, an intermediate section of the further wall is formed between the two reducing sections, which intermediate section is referred to as the second wall section. Thus, the intermediate section separates the two reducing sections from one another. The intermediate section extends in particular parallel to the central axis. Furthermore, in a preferred embodiment, the intermediate section is part of the compression section. That is, in the assembled state, the intermediate section is in contact with the sealing ring.

[0023] Furthermore, a third wall segment adjoins the second reducing segment in the longitudinal direction, which third wall segment is part of the compression segment and is in particular oriented parallel to the central axis.

[0024] Generally speaking, in a preferred embodiment, the second reduction section is part of the compression section and therefore bears against the sealing ring in the assembled state. In a preferred embodiment, the above-mentioned wall sections extending parallel to the central axis adjoin the second reduction section on both sides. In a preferred embodiment, since these sections are also part of the compression section, the compression section as a whole has a profiled course, in particular a stepped course, so that in the assembled state the sealing ring is compressed to different degrees at different sections (viewed in the longitudinal direction). As a result, the individual wall sections, i.e. the second and third wall sections and the wall sections in the region of the second reduction section, form individual sealing surfaces that ensure a particularly effective soundproof seal.

[0025] In a preferred embodiment, the first reducing section is not part of the compression section. This means that when the nozzle is inserted into the socket, the first reducing section is completely guided over the sealing ring. Therefore, in an embodiment with two reducing sections, preferably only the first reducing section is part of the compression section. A preferred embodiment is an embodiment with at least two reducing sections, in particular with only two reducing sections. A reducing section is generally defined as a wall section in which the radial distance decreases.

[0026] In a preferred embodiment, the further wall has a first wall section in front of the first reduction section (viewed in the longitudinal direction), which is at a radial distance from the bottom of the groove greater than the thickness of the sealing ring. As a result, when the nozzle is inserted into the socket, no compression of the sealing ring occurs in the region of the first wall section. Instead, the first wall section is dimensioned such that there is at least a small gap between the wall and the sealing ring. This reliably prevents axial forces from acting on the sealing ring in front of the first reduction section.

[0027] The first reducing section is preferably adjoined on both sides by wall sections extending parallel to the central axis. These wall sections are a first wall section and a second wall section arranged downstream of the first reducing section in the longitudinal direction.

[0028] As an alternative to the preferred embodiment with two reduction sections, in a simplified embodiment, only the first reduction section is provided. In this embodiment, the first reduction section is preferably located outside the compression section. Alternatively, it can also be located inside the compression section. In the previous embodiment (i.e. in the case where the first reduction section is located outside the compression section), the second wall section located longitudinally behind the first reduction section forms the compression section. In particular, the second wall section extends parallel to the central axis and forms a particularly straight course of the compression section, i.e. in this embodiment, the compression section has no stepped or other contoured structures.

[0029] In a preferred embodiment, the first reduction section also forms a stop, which, in the assembled state, abuts against the wall section of the opposite wall, thereby forming a stop acting in the longitudinal direction. The stop limits the movement of the nozzle into the socket in the longitudinal direction. Therefore, the end position of the engagement is precisely defined by the stop. Therefore, the position of each wall segment (for example the position of the second reduction section relative to the sealing ring or relative to the annular groove) is also defined by the stop. As an alternative to the design using the first reduction section as a stop, the stop is formed in another position. For example, the stop is formed by the end face of the nozzle and the corresponding annular surface of the socket. In addition, a web, in particular an annular web, is formed on the nozzle or the socket to limit the longitudinal movement. It is crucial to define the relative end positions of the two connecting parts relative to each other so that the required wall segments can be arranged in the correct position.

[0030] In a useful design, each wall has a threaded section which is arranged in the longitudinal direction downstream of the annular groove. The nozzle and the socket are thus connected to each other by a thread. Alternatively, there are other connection schemes between the nozzle and the socket. For example, a purely plug-in connection can be provided. In this case, measures are particularly required to produce a positive connection which acts in the longitudinal direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Some exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. These embodiments are shown in a partially simplified manner:

[0032] Figure 1 is a cross-sectional view of a BTE hearing aid having a base portion and an ear hook connected to the base portion;

[0033] Figure 2 is a partial perspective view of the connection area between the base part and the ear hook in an initial state before the nozzle of the base part is inserted into the socket of the ear hook;

[0034] Figure 3 is an enlarged view of the nozzle and socket in the sealing ring area of ​​the first embodiment having only one reduced section;

[0035] Figure 4 is with Figure 3 An enlarged view of an embodiment with two reduction sections similar to the preferred design of , wherein the second reduction section is located in the area of ​​the sealing ring; and

[0036] Figure 5 An alternative design to the preferred variant is a design with two reduced sections. DETAILED DESCRIPTION

[0037] Figure 1A common behind-the-ear (BTE) hearing aid 2 is shown, which has a base part 4 and an ear hook 6 attached to the base part. The base part 4 has a housing, in which a signal processing unit 3, a microphone 5 and a receiver 8 are arranged. In addition, control elements 7, such as buttons or switches, are usually arranged. The receiver 8 has a sound output nozzle, to which a sound tube 10 is attached in this example, which in turn is connected to a connecting piece 12. The connecting piece has a nozzle 14 at the end, which is inserted into a corresponding socket 16 in the ear hook 6. The nozzle 14 and the socket 16 are arranged in a housing. Figure 1 Not visible in Figure 1 In the embodiment shown in FIG. 1 , the cover or housing of the base portion 4 is omitted so that the interior of the base portion 4 is visible.

[0038] In operation, the sound signal is usually converted by the microphone 5 into an electrical signal, which is conditioned in the signal processing unit 3. The conditioned signal is transmitted to the earphone 8, which in turn converts the conditioned signal into an acoustic sound signal and emits it through the aforementioned sound outlet port, so that the sound is transmitted to the wearer's ear canal through the sound channel formed in the earphone 6 usually by the sound tube. As the name implies, the BTE hearing aid 2 is worn behind the ear by the wearer. The hearing aid is attached to the auricle of the wearer's ear by the ear hook 6.

[0039] The nozzle 14 and the socket 16 are substantially cylindrical and extend along a common central axis 18 in a longitudinal direction 20. The direction of the longitudinal direction 20 is defined here as the direction from the rear end to the front free end of the nozzle 14. At the same time, the longitudinal direction 20 also defines the direction in which the nozzle 14 is inserted into the socket 16. The nozzle 14 has a threaded section 22 on the front section, which can be screwed into a corresponding threaded section 22 of the socket 16. To this end, each threaded section 22 has a helical circumferential thread.

[0040] The nozzle 14 generally has an outer wall 24, while the socket 16 has an inner wall 26. An annular groove 28 is formed on the outer wall 24, and a sealing ring 30 in the form of an O-ring is located in the annular groove 28. Generally, the O-ring is composed of an elastic material and is compressible. In this exemplary embodiment, the annular groove 28 and the sealing ring 30 are arranged in front of the threaded section 22 when viewed in the longitudinal direction. The annular groove 28 is open to one side in the radial direction and has a groove bottom 29 opposite to the opening.

[0041] The nozzle 14 has a sound channel 32 inside. For example, one end of a sound tube is inserted into the inner cavity of the nozzle 14, such as Figure 2 The sound tube defines a sound channel 32 which continues on the side of the ear hook 6 in a further sound channel 34. For this purpose, a further sound tube is connected to the socket 16, for example.

[0042] A soundproof connection between the socket 16 and the nozzle 14 is ensured by means of the sealing ring 30. Typically, the sealing ring 30 is compressed radially (ie perpendicularly to the longitudinal direction 20) during assembly so that it is pressed between the inner wall 26 and the outer wall 24.

[0043] In order to achieve a sealing effect, the highest possible compression is required to ensure a complete circumferential seal. However, at the same time, when the nozzle 14 is inserted into the socket 16, there is a high risk of compression that causes the sealing ring 30 to be pushed out of the annular groove 28 against the longitudinal direction 20.

[0044] In order to achieve a good sealing effect and prevent the sealing ring 30 from being pressed out, special measures are provided, which will be referred to below. Figure 2-5 Provide explanation.

[0045] The inner wall 26 has a first reduced section 36, which is in particular conical in shape. The first reduced section 36 is therefore in an inclined orientation relative to the longitudinal direction 20 and has an angle of inclination α (cone angle) relative to the longitudinal direction 20, which is, for example, in the range between 20° and 70°, in particular between 30° and 60°. The first reduced section 36 extends in the longitudinal direction 20, for example, over a length corresponding to 10% to 40% of the thickness d of the sealing ring 30.

[0046] The first wall section 38 adjoins the first reduced section 36 in the longitudinal direction 20—in this case forming a step-like step. In the longitudinal direction 20, the first reduced section 36 is followed by a second wall section 40 extending parallel to the center axis 18.

[0047] In the assembled final state, the corresponding wall section abutting the sealing ring 30 defines a compression section 42 .

[0048] exist Figure 3 In the example of the embodiment of the present invention, the compression section 42 is formed by the second wall section 40. The compression of the sealing ring 30 will generally also cause it to deform, so that generally the annular groove 28 and the intermediate section between the nozzle 14 and the socket 16 are reliably filled and sealed.

[0049] In principle, a larger, especially thicker, sealing ring 30 would lead to an improved sealing effect. However, the nozzle 14 and the socket 16 are relatively small components and the available space is limited, so the size of the sealing ring 30 is limited. The fact that when the nozzle 14 is inserted into the socket 16, the reduction in diameter exerts a force against the longitudinal direction 22, which acts on the sealing ring 30 and can push it out of the annular groove 28, also limits the high compression.

[0050] In order to improve the sealing effect and prevent the sealing ring 30 from being pressed out as much as possible, a Figure 4 and 5 The improved embodiment shown.

[0051] Of particular importance is the provision of a second reduced section 44 which results in a further compression of the sealing ring 30. The reduced sections 36, 44 generally change the radial distance a between the corresponding wall section and the bottom 29 of the groove.

[0052] exist Figure 4 In the example of , the third wall segment 48 is located after the second reduced segment 44 in the longitudinal direction 20 and extends parallel to the center axis 18. Moreover, it is particularly important that in the final state of the combination, the second reduced segment 44, the front second wall segment 40 and the rear third wall segment 48 form a compression segment 42. As a result, a plurality of independent sealing surfaces are formed by these different wall segments. This significantly improves the sealing effect. In particular, the second reduced segment 44 enables a higher compression, because the two compression stages reduce the risk of the sealing ring 30 being pressed out. For example, with Figure 3 Compared to the embodiment of the present invention, a higher compression of 10% to 25% can be achieved without a higher risk of the sealing ring 30 being pushed out. Alternatively or additionally, this improved embodiment allows the use of a smaller sealing ring 30, in particular a sealing ring 30 with a smaller thickness d.

[0053] exist Figure 4 In the example of , the second reduction section 44 is also conical. Its cone angle α is preferably in the range between 20° and 70°, especially in the range between 30° and 60°. Preferably, the reduction section has the same cone angle α as the first reduction section 36.

[0054] In principle, there are different designs for the contour and shape of the reduction sections 36, 44 (especially for the second reduction section 44). For example, a stepped design can also be used as an alternative, such as Figure 5 In this case, the second reduced section 44 is oriented perpendicular to the longitudinal direction 20 .

[0055] For example, the reduction amount of the radial distance a achieved by the first reduction section 36 is within a range between 5% and 20% of the thickness d of the seal ring 30. For example, the reduction amount of the radial distance a achieved by the second reduction section 44 is also within a range between 5% and 20% of the thickness d. For example, the reduction amounts of the radial distance a achieved by the two reduction sections 36, 44 are the same or different.

[0056] Figure 4 and 5The particular advantage of the variants described in the embodiment of the present invention is that the contour design of the wall in the compression section 42 provides a plurality of sealing sections which constitute redundancy. In addition, this enables an increase in compression and thus an improvement in the sealing effect. These variants are particularly advantageous for installation situations in which only small sealing rings 30 can be used. In the case of larger sealing rings, the special contour reduces the risk of the sealing ring 30 being pressed out. In addition to the contour design of the compression section 42, it is particularly decisive that the second reduction section 44 acts on the sealing ring 30 at a later time than the first reduction section 36 when the components are joined.

[0057] During assembly, the nozzle 14 is inserted into the socket 16 in the longitudinal direction 20. Figure 2 In the variant shown, this is achieved by screwing it in. To this end, the ear hook 6 and its socket 16 are usually screwed onto the nozzle 14. The end position of the engagement is usually defined by a stop, by means of which a defined relative position is established between the nozzle 14 and the socket 16, so that the respective wall section is in the desired position relative to the sealing ring 30. Preferably, the stop is formed by a first reduced section 36 which, in the assembled state, abuts against a corresponding counter-stop on the opposite wall.

[0058] The invention is described herein in conjunction with an embodiment of a connection between a base part 4 and an ear hook 6. In principle, the design described here with a sealing ring 30 between the socket 16 and the nozzle 14 and the special contour of the wall can also be transferred to other designs requiring a soundproof connection between two components, in particular for hearing aid designs.

[0059] Reference numerals list

[0060] 2 BTE hearing aids

[0061] 3 Signal processing unit

[0062] 4 Base

[0063] 5 Microphone

[0064] 6 Ear hooks

[0065] 7 Control elements

[0066] 8 Receiver

[0067] 10 Sound Tube

[0068] 12 Connectors

[0069] 14 Nozzle

[0070] 16 sockets

[0071] 18 Central axis

[0072] 20 Vertical

[0073] 22 thread segment

[0074] 24 outer wall

[0075] 26 Inner wall

[0076] 28 Annular groove

[0077] 29 Groove bottom

[0078] 30 Sealing ring

[0079] 32 channels

[0080] 34 Another channel

[0081] 36 First reduction stage

[0082] 38 First wall segment

[0083] 40 Second wall segment

[0084] 42 Compression section

[0085] 44 Second reduction stage

[0086] 48 Third wall segment

[0087] a Radial distance

[0088] α cone angle

[0089] d Thickness

Claims

1. A hearing aid (2) comprising a base part (4) and a second part which can be fastened to the base part, wherein - in the assembled state, the base part (4) and the second part are connected to each other via the nozzle (14) and the socket (16), the nozzle (14) being insertable into the socket, - a sound channel (32) extending through the nozzle (14), - the nozzle (14) and the socket (16) extend in the longitudinal direction (20) along the central axis (18), - the nozzle (14) can be inserted into the socket (16) in the longitudinal direction (20), - the nozzle (14) and the socket (16) each have a wall, ie the nozzle (14) has an outer wall (24) and the socket (16) has an inner wall (26), - in the assembled state, a circumferential sealing ring (30) having a thickness (d) is arranged between the outer wall (24) and the inner wall (26), said sealing ring being compressed by the outer wall (24) and the inner wall (26), wherein - forming an annular groove (28) having a groove bottom (29) in one of the outer wall (24) and the inner wall (26), - a sealing ring (30) is located in the annular groove (28), - a radial distance (a) between the other of the outer wall (24) and the inner wall (26) and the bottom (29) of the groove, and - the other wall has a first wall section (38), a second wall section (40) and a first reducing section (36), so that the radial distance (a) decreases in the longitudinal direction (20), and when the nozzle (14) is inserted into the socket (16), the sealing ring (30) is compressed by the first reducing section (36), - the other wall has a compression section (42) against which the compressed sealing ring (30) bears in the assembled state, - the compression section (42) directly bears against the sealing ring and compresses the sealing ring radially in the assembled state, - the first reducing section (36) is at least partially or completely slid longitudinally over the sealing ring (30), thereby compressing the sealing ring (30), a second wall section (40) following said first reducing section (36) in the longitudinal direction (20) and forming at least a part of said compression section (42), in - when the nozzle is inserted into the socket, the first reduction section (36) is completely guided over the sealing ring (30), so that, in the assembled state, the first reduction section (36) is not part of the compression section (42), or - In the assembled state, the first reduction section (36) remains part of the sealing ring (30) and is therefore part of the compression section (42).

2. The hearing aid (2) according to claim 1, characterized in that A second reducing section (44) is formed downstream of the first reducing section (36) in the longitudinal direction (20), and in addition to the first reducing section (36), the second reducing section (44) also reduces the radial distance (a).

3. The hearing aid (2) according to claim 2, characterized in that The first reducing section (36) and the second reducing section (44) are respectively conical.

4. The hearing aid (2) according to claim 2 or 3, characterized in that Between the two reduced sections (36, 44), the middle section of the further wall extends as the second wall section (40), which is part of the compressed section (42).

5. The hearing aid (2) according to claim 4, characterized in that The second wall section (40) is oriented parallel to the central axis (18).

6. The hearing aid (2) according to claim 2 or 3, characterized in that A third wall section (48) adjoins the second reduced section (44) in the longitudinal direction (20), and is a part of the compressed section (42).

7. The hearing aid (2) according to claim 6, characterized in that The third wall segment (48) is oriented parallel to the central axis (18).

8. The hearing aid (2) according to claim 2 or 3, characterized in that The compression section (42) includes a second reduction section (44).

9. The hearing aid (2) according to claim 1 or 2, characterized in that: The further wall located in front of the first reduction section (36) in the longitudinal direction (20) has the first wall section (38) whose distance (a) is greater than the thickness (d) of the sealing ring (30), so that no compression occurs in the area of ​​the first wall section (38).

10. The hearing aid (2) according to claim 1 or 2, characterized in that The first reduced section (36) forms a stop which, in the assembled state, abuts against a wall section of the opposing outer wall (24).

11. The hearing aid (2) according to claim 1 or 2, characterized in that The outer wall (24) and the inner wall (26) each include a threaded section (22) which is arranged downstream of the annular groove (28) in the longitudinal direction (20).

12. The hearing aid (2) according to claim 1 or 2, characterized in that The annular groove (28) is formed on the nozzle (14), and the first reduced section (36) is formed on the socket (16).

13. The hearing aid (2) as claimed in claim 1 or 2, designed as a BTE hearing aid, wherein the second part is an ear hook.

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