An adjustable partial replacement ossicular structure

Abstract

The utility model discloses an adjustable partial replacement artificial ossicle structure, including auditory ossicle stem, the auditory ossicle stem is arranged between stapes and tympanic membrane, still include the support mechanism for constituting the cladding type support structure, the installation mechanism for constituting adjustable mounting structure and the top tray mechanism for constituting the openwork top tray structure, the support mechanism is arranged in the auditory ossicle stem one end near stapes, the installation mechanism is arranged in the auditory ossicle stem one end away from the support mechanism, and the top tray mechanism is assembled in the installation mechanism one end near tympanic membrane, the beneficial effect of the utility model is equipped with the support mechanism, can be through cladding type support structure with stapes arc and carry out cladding type connection to effectively improve the support stability of artificial ossicle, is equipped with the installation mechanism, can fine tune the position of top tray mechanism to effectively improve its regulation accuracy to realize the accurate adjustment of artificial ossicle length, and the use flexibility is strong, can through the pinch locking gap to carry out the quick positioning of top tray mechanism.

Description

Technical Field

[0001] This utility model relates to the field of artificial ossicle technology, and in particular to an adjustable local replacement artificial ossicle structure. Background Technology

[0002] In existing technology, the ossicles are the smallest bones in the human body, also known as the ossicles. Each ear has three ossicles: the malleus, incus, and stapes. Most of them reside within the epitympanic cavity and are connected by ligaments and joints to form the ossicular chain. The malleus handle is located on the inner surface of the tympanic membrane, between the mucosa and fibrous layers. The stapes consists of the stapes arch and the stapes footplate. The latter is in contact with the perilymph of the inner ear and is the last structure in the middle ear to transmit vibrations to the inner ear. The stapes footplate is connected to the oval window by the annular ligament. The incus lies between the malleus and stapes. When the ossicles are damaged due to disease or congenital reasons, surgical implantation of an ossicular prosthesis is generally required to replace the function of the ossicles. When the damaged stapes is replaced by the ossicular prosthesis, the vibrations transmitted from the tympanic membrane will be partially or completely compensated for and transmitted to the inner ear by the ossicular prosthesis, thus completely curing ear diseases caused by vibration transmission failure.

[0003] Damage to the stapes generally falls into three categories: complete damage to the stapes arch, no damage to the stapes arch, and no damage to the stapes head. When the stapes head is intact, a partial replacement artificial ossicle structure is needed to replace the malleus and incus, with one end resting on the stapes head and the other on the tympanic membrane, thus forming an ossicular chain that replaces the malleus and incus. However, existing artificial ossicles typically use a fixed rod structure or a segmented rod structure. When length adjustment is needed, the rod structure must be trimmed at each node to achieve the length adjustment. However, this adjustment method cannot precisely adjust the length of the artificial ossicle, resulting in low precision in length adjustment and poor flexibility in use.

[0004] Chinese utility model patent application number 202122310383.0 discloses an artificial ossicle with drug release function, comprising: an ossicle body, the ossicle body including a top plate, a stem, and a base plate, one end of the stem being connected to the top plate and the other end to the base plate; and a drug release support, the drug release support being connected to the outer surface of the stem, and the drug release support having multiple drug release grooves on its outer periphery. However, although the length of this artificial ossicle with drug release function is adjustable, its stem structure needs to be trimmed at nodes to achieve the length adjustment operation. This adjustment method cannot precisely adjust the length of the artificial ossicle, resulting in low accuracy in length adjustment and poor flexibility in use. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable local replacement artificial ossicle structure.

[0006] To achieve the above objectives, the technical solution proposed by this utility model is as follows: An adjustable partial replacement artificial ossicle structure includes an ossicle rod arranged between the stapes and the tympanic membrane, a support mechanism for forming a covering support structure, an installation mechanism for forming an adjustable mounting structure, and a top plate mechanism for forming a hollow top plate structure. The support mechanism is arranged at the end of the ossicle rod near the stapes, the installation mechanism is arranged at the end of the ossicle rod away from the support mechanism, and the top plate mechanism is assembled at the end of the installation mechanism near the tympanic membrane.

[0007] The support mechanism includes a support base and support claws. The support base is disposed at one end of the ossicle rod near the stapes arch and is integrally formed with the ossicle rod. The support base abuts against the stapes arch. Several support claws are provided, and the several support claws are evenly spaced around the periphery of the end of the support base away from the ossicle rod and are integrally formed with the support base. The support claws engage with the stapes arch.

[0008] The support base is configured as an arc-shaped cup-shaped structure corresponding to the stapes arch, and the support claw is configured as a dovetail-shaped claw structure with several support claws arranged at intervals. The connection between the support claw and the support base is provided with a bending line. The support base and the support claw together form a wrap-around connection structure to wrap around and connect with the stapes arch.

[0009] The mounting mechanism includes a mounting post and a mounting sleeve. The mounting post is located at the end of the ossicle rod away from the support base and is integrally formed with the ossicle rod. The outer side of the mounting post is provided with external threads. The mounting sleeve is located on the outer side of the mounting post and is sleeved with the mounting post. The inner side of the mounting sleeve is provided with internal threads. The mounting sleeve is threadedly connected to the mounting post, and the upper part of the mounting post protrudes from the mounting post.

[0010] The lower part of the mounting sleeve is provided with a locking notch, which penetrates the side wall of the mounting sleeve and is configured as an open groove structure.

[0011] The mounting post is coaxially arranged with the ossicle rod, and the diameter of the mounting post is larger than the diameter of the ossicle rod. The mounting post and the ossicle rod together form a segmented rod structure.

[0012] The top plate mechanism includes a top plate base block, connecting ribs, and a top plate edge ring. The top plate base block is located at the end of the mounting sleeve away from the ossicle rod and is integrally formed with the mounting sleeve. The mounting post passes through the top plate base block. Several sets of connecting ribs are arranged radially on the side of the top plate base block, with one end integrally formed with the top plate base block. The top plate edge ring is located at the end of the several sets of connecting ribs away from the top plate base block and is integrally formed with the connecting ribs. The top plate edge ring is arranged on the outside of the top plate base block through the connecting ribs and is spaced apart from the top plate base block.

[0013] The top plate base block and the top plate edge ring are concentrically arranged, and the connecting rib is set as a straight rib structure. The outer edge of the top plate edge ring is set as an arc-shaped flange structure. The top plate base block, the connecting rib, and the top plate edge ring together form a hollow top plate structure to abut against the tympanic membrane.

[0014] The top plate mechanism includes a top plate base block, connecting ribs, and a top plate edge ring. The top plate base block is located at the end of the mounting post away from the ossicle rod and is sleeved with the mounting post. The top plate base block is threadedly connected to the mounting post, and the mounting post passes through the top plate base block. Several sets of connecting ribs are provided, and the several sets of connecting ribs are evenly spaced and arranged around the side of the top plate base block, with one end integrally formed with the top plate base block. The top plate edge ring is located at the end of the several sets of connecting ribs away from the top plate base block and is integrally formed with the connecting ribs. The top plate edge ring is arranged on the outside of the top plate base block through the connecting ribs and leaves a gap between it and the top plate base block.

[0015] The top plate base block has a locking notch on its side. The locking notch penetrates the side wall of the top plate base block and is configured as an open slot structure. The top plate base block and the top plate edge ring are arranged concentrically or eccentrically, and the connecting rib is configured as a curved rib structure. The outer edge of the top plate edge ring is configured as an arc-shaped flange structure. The top plate base block, the connecting rib, and the top plate edge ring together constitute a hollow top plate structure to abut against the tympanic membrane.

[0016] The beneficial effects of this utility model are: It is equipped with a support mechanism that can be connected to the stapes arch through a wrap-around support structure to effectively improve the support stability of the artificial ossicle. It is also equipped with an installation mechanism that works with the top plate mechanism to fine-tune the position of the top plate mechanism to effectively improve its adjustment accuracy, thereby achieving precise adjustment of the length of the artificial ossicle. It is highly flexible in use and the top plate mechanism can be quickly positioned by pinching the locking notch. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the cooperation between the support mechanism and the ossicle rod in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the fitting of the mounting sleeve and the locking notch in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the top plate mechanism structure in Embodiment 2 of this utility model.

[0018] In the diagram: 1. Ossicle rod; 2. Support base; 3. Support claw; 4. Mounting post; 5. Mounting sleeve; 6. Locking notch; 7. Top plate base block; 8. Connecting rib; 9. Top plate edge ring. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. Example 1: An adjustable partial replacement artificial ossicle structure includes an ossicle rod 1, which is arranged between the stapes and the tympanic membrane. It also includes a support mechanism for forming a covering support structure, an installation mechanism for forming an adjustable mounting structure, and a top plate mechanism for forming a hollow top plate structure. The support mechanism is located at the end of the ossicle rod 1 near the stapes, the installation mechanism is located at the end of the ossicle rod 1 away from the support mechanism, and the top plate mechanism is assembled at the end of the installation mechanism near the tympanic membrane. A schematic diagram of the overall structure of Embodiment 1 of this utility model is shown below. Figure 1 As shown.

[0020] The support mechanism includes a support base 2 and support claws 3. The support base 2 is located at the end of the ossicle rod 1 near the stapes arch and is integrally formed with the ossicle rod 1. The support base 2 abuts against the stapes arch. Several support claws 3 are provided, and the several support claws 3 are evenly spaced around the periphery of the end of the support base 2 away from the ossicle rod 1 and are integrally formed with the support base 2. The support claws 3 engage with the stapes arch. The support base 2 is configured with an arc-shaped cup-shaped structure corresponding to the stapes arch, and the support claws 3 are configured with a dovetail-shaped claw structure with several support claws 3 spaced apart. The connection between the support claws 3 and the support base 2 has a bend. The support base 2 and the support claws 3 together form a covering connection. The structure is designed to cover and connect with the stapes arch. The support mechanism, through the cooperation of the support base 2 and the support claw 3, forms a covering support structure to cooperate with the stapes arch, thereby realizing the installation support between the tympanic membrane and the stapes arch. The support base 2 serves as the installation support structure for the artificial ossicle and provides installation support for the support claw 3. The support claw 3, together with the support base 2, forms a covering support structure to engage with the stapes arch. The dovetail-shaped claw structure effectively improves the fit and connection stability between the support structure and the stapes arch. The support claw 3 can be bent along the bending line to engage with the stapes. A schematic diagram of the cooperation between the support mechanism and the ossicle rod 1 in Embodiment 1 of this utility model is shown below. Figure 2As shown.

[0021] The mounting mechanism includes a mounting post 4 and a mounting sleeve 5. The mounting post 4 is located at the end of the ossicle rod 1 away from the support base 2 and is integrally formed with the ossicle rod 1. The outer side of the mounting post 4 has external threads. The mounting sleeve 5 is located on the outer side of the mounting post 4 and is sleeved with the mounting post 4. The inner side of the mounting sleeve 5 has internal threads. The mounting sleeve 5 is threadedly connected to the mounting post 4, and the upper part of the mounting post 4 protrudes from the mounting post 4. The mounting post 4 is coaxially arranged with the ossicle rod 1, and the diameter of the mounting post 4 is larger than the diameter of the ossicle rod 1. The mounting post 4 and the ossicle rod 1 together form a segmented rod structure. The mounting mechanism, through the cooperation of the mounting post 4 and the mounting sleeve 5, forms an adjustable mounting structure for artificial ossicles to adjust the position of the top plate mechanism. The mounting post 4 provides adjustable support for the mounting sleeve 5, and the mounting sleeve 5 provides mounting support for the top plate structure. The position of the top plate mechanism can be adjusted by the relative rotation between the mounting sleeve 5 and the mounting post 4, which allows the mounting sleeve 5 to move relative to the mounting post 4.

[0022] The lower part of the mounting sleeve 5 is provided with a locking notch 6, which penetrates the side wall of the mounting sleeve 5 and is configured as an open slot structure. The locking notch 6 serves as a locking structure on the mounting sleeve 5. After the position of the top plate mechanism is adjusted, the locking notch 6 is pinched to position the mounting sleeve 5 and the mounting post 4, thus achieving the positioning of the top plate mechanism relative to the mounting post 4. Then, the portion of the mounting post 4 protruding from the top plate mechanism is cut off, thus meeting the installation requirements of the artificial ossicle. A schematic diagram of the mounting sleeve 5 and locking notch 6 in embodiment one of this utility model is shown below. Figure 3 As shown.

[0023] The top plate mechanism includes a top plate base block 7, connecting ribs 8, and a top plate edge ring 9. The top plate base block 7 is located at the end of the mounting sleeve 5 away from the ossicle rod 1 and is integrally formed with the mounting sleeve 5. The mounting post 4 passes through the top plate base block 7. Several sets of connecting ribs 8 are arranged radially on the side of the top plate base block 7, with one end integrally formed with the top plate base block 7. The top plate edge ring 9 is located at the end of the several sets of connecting ribs 8 away from the top plate base block 7 and is integrally formed with the connecting ribs 8. The top plate edge ring 9 is arranged on the outside of the top plate base block 7 through the connecting ribs 8 and is spaced apart from the top plate base block 7. The top plate mechanism, through the cooperation of the top plate base 7, connecting ribs 8, and top plate edge ring 9, forms a hollow top plate structure to fit with the tympanic membrane. The top plate base 7 provides installation support for the connecting ribs 8, and the connecting ribs 8 provide installation support for the top plate edge ring 9 to achieve the connection between the top plate edge ring 9 and the top plate base 7. Under the action of the connecting ribs 8, the top plate edge ring 9, together with the top plate base 7, forms a hollow top plate structure, thereby increasing the contact area between the top plate structure and the tympanic membrane. This ensures the stability of the artificial ossicle installation while avoiding the formation of a cavity between the top plate structure and the tympanic membrane, which would affect the sound transmission effect.

[0024] The top plate base 7 and the top plate edge ring 9 are concentrically arranged, and the connecting rib 8 is set as a straight rib structure. The outer edge of the top plate edge ring 9 is set as an arc-shaped flange structure. The top plate base 7, the connecting rib 8 and the top plate edge ring 9 together form a hollow top plate structure to abut against the tympanic membrane. The outer edge of the top plate edge ring 9 adopts an arc-shaped flange structure to improve the fit between the top plate structure and the tympanic membrane, and can improve the biocompatibility and compatibility of the artificial ossicle.

[0025] Example 2: Based on Embodiment 1, keeping the rest unchanged, the mounting sleeve 5 is removed and the top plate mechanism is replaced. The top plate mechanism includes a top plate base 7, connecting ribs 8, and a top plate edge ring 9. The top plate base 7 is located at the end of the mounting post 4 away from the ossicle rod 1 and is sleeved with the mounting post 4. The top plate base 7 is threadedly connected to the mounting post 4, and the mounting post 4 passes through the top plate base 7. Several sets of connecting ribs 8 are provided, and the several sets of connecting ribs 8 are evenly spaced and arranged around the side of the top plate base 7, with one end integrally formed with the top plate base 7. The top plate edge ring 9 is located at the end of the several sets of connecting ribs 8 away from the top plate base 7 and is integrally formed with the connecting ribs 8. The top plate edge ring 9 is arranged on the outside of the top plate base 7 through the connecting ribs 8 and leaves a gap between it and the top plate base 7. The side of the top plate base 7 is provided with a locking notch 6, which penetrates the side wall of the top plate base 7 and is set as an open slot structure. The top plate mechanism is connected by the top plate base 7, connecting ribs 8, and top plate edge ring 9. The locking notch 6, in conjunction with the top plate, forms a top plate structure with a positioning function. The top plate base 7 provides installation support for the connecting rib 8 and allows relative movement between the top plate base 7 and the mounting column 4 via relative rotation, thereby adjusting the position of the top plate structure. The connecting rib 8 provides installation support for the top plate edge ring 9 to connect it to the top plate base 7. The top plate edge ring 9, under the action of the connecting rib 8, together with the top plate base 7, forms a hollow top plate structure. The locking notch 6 serves as a locking structure on the top plate base 7. After the position of the top plate mechanism is adjusted, the locking notch 6 is tightened to position and engage the top plate base 7 with the mounting column 4, thus achieving the positioning of the top plate mechanism relative to the mounting column 4. Then, the portion of the mounting column 4 protruding from the top plate mechanism is cut off to meet the installation requirements of the artificial ossicle. A schematic diagram of the top plate mechanism structure in Embodiment 2 of this utility model is shown below. Figure 4 As shown.

[0026] The top plate base 7 and the top plate edge ring 9 are set concentrically or eccentrically, and the connecting rib 8 is set as a curved rib structure. The outer edge of the top plate edge ring 9 is set as an arc-shaped flange structure. The top plate base 7, the connecting rib 8 and the top plate edge ring 9 together form a hollow top plate structure to abut against the tympanic membrane. The concentric or eccentric setting of the top plate base 7 and the top plate edge ring 9 can meet the installation requirements of artificial ossicles. When the top plate base 7 and the top plate edge ring 9 are eccentrically set, the installation angle of the top plate base 7 can be adjusted significantly.

[0027] The mounting column 4 can be configured as a segmented structure so that the part of the mounting column 4 protruding from the top plate structure can be cut off after the top plate structure is adjusted.

[0028] The inner side of the mounting sleeve 5 can be provided with an internal thread, and the inner side of the top plate base 7 can be set as a through hole structure. The inner diameter of the through hole structure is slightly larger than the inner diameter of the internal thread structure. After the part of the mounting post 4 that protrudes from the top plate structure is cut off, the cross-section of the cut part has burrs. The mounting post 4 is rotated in the opposite direction so that the end of the mounting post 4 with burrs is retracted into the through hole structure inside the top plate base 7, so as to avoid the burr structure affecting the installation of the artificial ossicle.

[0029] The outer surface of the top plate mechanism can be made into a frosted rough surface structure, and its surface can be provided with a raised structure to increase the friction between the artificial ossicle and the cartilage piece, thereby improving the installation stability of the artificial ossicle.

[0030] Working principle: When ossicular chain reconstruction is required, the position of the top plate mechanism on the mounting post 4 is adjusted according to the patient's ossicular condition. The mounting sleeve 5 is rotated relative to the mounting post 4 so that the mounting sleeve 5 drives the top plate mechanism to move relative to the mounting post 4. After the adjustment is completed, the locking notch 6 is pinched to position the mounting sleeve 5 and the mounting post 4, thus achieving the positioning of the top plate mechanism relative to the mounting post 4. Then, the part of the mounting post 4 that protrudes from the top plate mechanism is cut off to meet the installation requirements of the artificial ossicle. In the installed state, the support base 2 is covered and clamped onto the stapes arch by the support claw 3. The hollow top plate structure composed of the top plate base block 7, connecting rib 8, and top plate edge ring 9 is connected with the tympanic membrane to form an ossicular chain to restore the function of the middle ear sound transmission system.

[0031] The beneficial effects of this utility model are that it is equipped with a support mechanism, which can be connected to the stapes arch through a wrap-around support structure to effectively improve the support stability of the artificial ossicle; it is equipped with an installation mechanism that works with the top plate mechanism, which can finely adjust the position of the top plate mechanism to effectively improve its adjustment accuracy, thereby achieving precise adjustment of the length of the artificial ossicle; it is highly flexible in use, and the top plate mechanism can be quickly positioned by pinching the locking notch.

[0032] The above description details one embodiment of the present utility model, but it is merely a preferred embodiment and should not be construed as limiting the scope of the present utility model. All equivalent variations and improvements made within the scope of the present utility model application should still fall within the patent coverage of the present utility model.

Claims

1. An adjustable partial replacement artificial ossicle structure, comprising an ossicle rod (1) arranged between the stapes and the tympanic membrane, characterized in that, It also includes a support mechanism for forming a covered support structure, an installation mechanism for forming an adjustable installation structure, and a top plate mechanism for forming a hollow top plate structure. The support mechanism is arranged at the end of the ossicle rod (1) near the stapes, the installation mechanism is arranged at the end of the ossicle rod (1) away from the support mechanism, and the top plate mechanism is assembled at the end of the installation mechanism near the tympanic membrane.

2. The adjustable local replacement artificial ossicle structure as described in claim 1, characterized in that, The support mechanism includes a support base (2) and support claws (3). The support base (2) is disposed at one end of the ossicle rod (1) near the stapes arch and is integrally formed with the ossicle rod (1). The support base (2) abuts against the stapes arch. There are several support claws (3). Several support claws (3) are evenly spaced around the periphery of the end of the support base (2) away from the ossicle rod (1) and are integrally formed with the support base (2). The support claws (3) engage with the stapes arch.

3. The adjustable partial replacement artificial ossicle structure as described in claim 2, characterized in that, The support base (2) is configured as an arc-shaped cup-shaped structure corresponding to the stapes arch. The support claw (3) is configured as a dovetail-shaped claw structure and several support claws (3) are arranged at intervals. The connection between the support claw (3) and the support base (2) is provided with a bending line. The support base (2) and the support claw (3) together form a wrap-around connection structure to wrap around and connect with the stapes arch.

4. The adjustable local replacement artificial ossicle structure as described in claim 3, characterized in that, The mounting mechanism includes a mounting post (4) and a mounting sleeve (5). The mounting post (4) is located at the end of the ossicle rod (1) away from the support base (2) and is integrally formed with the ossicle rod (1). The outer side of the mounting post (4) is provided with external threads. The mounting sleeve (5) is located on the outer side of the mounting post (4) and is sleeved with the mounting post (4). The inner side of the mounting sleeve (5) is provided with internal threads. The mounting sleeve (5) is threadedly connected to the mounting post (4), and the upper part of the mounting post (4) protrudes from the mounting post (4).

5. The adjustable partial replacement artificial ossicle structure as described in claim 4, characterized in that, The lower part of the mounting sleeve (5) is provided with a locking notch (6), which penetrates the side wall of the mounting sleeve (5) and is configured as an open groove structure.

6. The adjustable partial replacement artificial ossicle structure as described in claim 5, characterized in that, The mounting post (4) is coaxially arranged with the ossicle rod (1), and the diameter of the mounting post (4) is larger than the diameter of the ossicle rod (1). The mounting post (4) and the ossicle rod (1) together constitute a segmented rod structure.

7. The adjustable partial replacement artificial ossicle structure as described in claim 6, characterized in that, The top plate mechanism includes a top plate base block (7), connecting ribs (8), and a top plate edge ring (9). The top plate base block (7) is located at the end of the mounting sleeve (5) away from the ossicle rod (1) and is integrally formed with the mounting sleeve (5). The mounting post (4) passes through the top plate base block (7). The connecting ribs (8) are provided in several groups. The several groups of connecting ribs (8) are arranged radially on the side of the top plate base block (7) and one end is integrally formed with the top plate base block (7). The top plate edge ring (9) is located at the end of the several groups of connecting ribs (8) away from the top plate base block (7) and is integrally formed with the connecting ribs (8). The top plate edge ring (9) is arranged on the outside of the top plate base block (7) through the connecting ribs (8) and has a gap between it and the top plate base block (7).

8. The adjustable partial replacement artificial ossicle structure as described in claim 7, characterized in that, The top plate base block (7) and the top plate edge ring (9) are arranged concentrically and the connecting rib (8) is set as a straight rib structure. The outer edge of the top plate edge ring (9) is set as an arc-shaped flange structure. The top plate base block (7), the connecting rib (8) and the top plate edge ring (9) together form a hollow top plate structure to abut against the tympanic membrane.

9. The adjustable partial replacement artificial ossicle structure as described in claim 4, characterized in that, The top plate mechanism includes a top plate base block (7), connecting ribs (8), and a top plate edge ring (9). The top plate base block (7) is located at the end of the mounting post (4) away from the ossicle rod (1) and is sleeved with the mounting post (4). The top plate base block (7) is threadedly connected to the mounting post (4). The mounting post (4) passes through the top plate base block (7). The connecting ribs (8) are provided in several groups. The several groups of connecting ribs (8) are evenly spaced and arranged around the side of the top plate base block (7), and one end of them is integrally formed with the top plate base block (7). The top plate edge ring (9) is located at the end of the several groups of connecting ribs (8) away from the top plate base block (7) and is integrally formed with the connecting ribs (8). The top plate edge ring (9) is arranged on the outside of the top plate base block (7) through the connecting ribs (8) and has a gap between it and the top plate base block (7).

10. The adjustable partial replacement artificial ossicle structure as described in claim 9, characterized in that, The top plate base (7) is provided with a locking notch (6) on its side. The locking notch (6) penetrates the side wall of the top plate base (7) and is configured as an open groove structure. The top plate base (7) and the top plate edge ring (9) are arranged concentrically or eccentrically, and the connecting rib (8) is configured as a curved rib structure. The outer edge of the top plate edge ring (9) is configured as an arc-shaped flange structure. The top plate base (7), the connecting rib (8) and the top plate edge ring (9) together constitute a hollow top plate structure to abut against the tympanic membrane.

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