Self-cleaning heart stethoscope and use method thereof

Abstract

The invention belongs to the technical field of heart stethoscopes, and particularly relates to a self-cleaning heart stethoscope and a using method thereof.The self-cleaning heart stethoscope comprises an ear wearing device, a connecting pipe is installed at one end of the ear wearing device, a placing block is installed at one end of the connecting pipe, and an attaching piece is installed at the end, away from the connecting pipe, of the placing block and used for being attached to the heart of a patient; in-ear pads are installed at the two ends, away from the connecting pipe, of the ear wearing device, a cleaning mechanism is installed on the outer side of the containing block and used for cleaning the attaching piece, the cleaning mechanism comprises a sliding ring slidably connected to the outer side of the containing block, and sliding pipes are fixed to the two sides of the sliding ring; a fixed pipe is slidably connected to the end, close to the attaching piece, in the sliding pipe. The position in contact with a patient can be automatically cleaned, so that the risk of cross infection is reduced, the clarity of a doctor for listening to the heartbeat of the patient is improved, and the sound of the stethoscope in contact with the ears of the doctor can be adjusted to meet the hearing requirements of different doctors.

Description

Technical Field

[0001] The invention belongs to the technical field of cardiac stethoscopes, and in particular relates to a self-cleaning cardiac stethoscope and a use method thereof. Background Art

[0002] In modern medical diagnosis, the cardiac stethoscope is an indispensable tool that allows doctors to evaluate the patient's heart function through auscultation. However, the traditional stethoscope has some limitations, especially in terms of hygiene and ease of use. Since the chest and ear pieces of the stethoscope will directly contact different individuals during use, this may lead to the risk of cross-infection. In addition, when using the stethoscope, doctors often need to adjust the volume according to the individual's hearing sensitivity to obtain the best auscultation effect, but the existing stethoscopes provide limited adjustment functions in this regard.

[0003] In order to solve these problems, some improved stethoscopes have been proposed. A patent proposes a stethoscope with a disinfection function, which reduces the risk of cross infection by ultraviolet light or other disinfection methods. However, these solutions usually only focus on the disinfection process of the stethoscope, but do not consider the real-time self-cleaning process of the stethoscope during the auscultation process.

[0004] In addition, regarding sound adjustment, although there are some electronic stethoscopes on the market that can adjust the sound volume through electronic amplification, these devices are often expensive and may not provide the same auscultation experience as traditional stethoscopes in some cases;

[0005] Therefore, the present invention provides a self-cleaning cardiac stethoscope. Summary of the invention

[0006] The purpose of the present invention is to provide a self-cleaning cardiac stethoscope and a method of using the same, which can automatically clean the position in contact with the patient to reduce the risk of cross infection, improve the clarity of the doctor's listening to the patient's heartbeat, and adjust the sound volume when the stethoscope contacts the doctor's ear to meet the hearing needs of different doctors.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A self-cleanable cardiac stethoscope comprises an earpiece, one end of the earpiece is provided with a connecting tube, one end of the connecting tube is provided with a placing block, one end of the placing block away from the connecting tube is provided with a fitting sheet, the fitting sheet is used to fit with the heart of a patient, and both ends of the earpiece away from the connecting tube are provided with ear pads;

[0009] A cleaning mechanism is installed on the outer side of the placement block, and the cleaning mechanism is used to clean the bonding sheet.

[0010] The cleaning mechanism comprises a sliding ring slidably connected to the outside of the placement block, sliding tubes are fixed on both sides of the sliding ring, a fixed tube is slidably connected to the inside of the sliding tube and one end close to the bonding sheet, an air guide block is installed at one end of the fixed tube away from the sliding tube, a first spring is installed between the air guide block and the sliding tube and located on the outside of the fixed tube, the air guide block is fixed on the bonding sheet and an air guide port is arranged at a position toward the center of the bonding sheet;

[0011] The first cavity, the second cavity and the third cavity are respectively provided inside the sliding tube, the fixed tube and the air guide block; an airbag is fixed to the end of the sliding tube away from the fixed tube, and the airbag is communicated with the first cavity; a connecting port is provided on the outside of the sliding tube and close to the fixed tube; a sliding block is provided on the end of the fixed tube close to the sliding tube and located inside the sliding tube, and the sliding block is used to block the connecting port; a fourth cavity is provided inside the fixed tube and close to the first cavity, and the fourth cavity is respectively communicated with the first cavity and the second cavity; a sealing mechanism is provided in the fourth cavity, and the sealing mechanism is used to block the fourth cavity.

[0012] The blocking mechanism includes a mounting frame fixed inside the fourth cavity, and the mounting frame is U-shaped, and the U-shaped opening of the mounting frame faces the direction of the second cavity, an air guide groove is arranged between the fixed tube and the mounting frame, an electromagnet is fixed inside the mounting frame, a second spring is fixed to the electromagnet in the direction close to the second cavity, and an iron ball is fixed to the end of the second spring away from the electromagnet, and an abutting annular plate is arranged at the position of the fourth cavity close to the second cavity, an opening is arranged at the center position of the abutting annular plate, and the iron ball and the opening of the abutting annular plate abut each other.

[0013] A plurality of fixing plates are arranged inside the in-ear pad, a spacing groove is arranged between every two adjacent fixing plates, the plurality of fixing plates are connected by a plurality of supporting strips, a threaded plate is threadedly connected at a position on the outside of the earmuff and close to the fixing plates, and the threaded plate is fixed to one of the outermost fixing plates, and a contact plate is fixed to the end of the earmuff, and the contact plate is in contact with one of the fixing plates.

[0014] A method for using a self-cleaning cardiac stethoscope, the method is used to self-clean the above cardiac stethoscope, the method comprising the following steps:

[0015] S1: Pressing the sliding ring and the sliding tube can guide the gas in the first cavity to the inside of the airbag and expand the airbag;

[0016] S2: Release the sliding ring and only take the placement block. At this time, the sliding ring is reset by the elastic force of the first spring. At this time, the electromagnet can be started to adsorb the iron ball. After the iron ball moves to the inside of the mounting frame, the opening position of the abutting annular plate is in an open state. The gas inside the airbag is blown to the bonding sheet through the air guide port, so as to blow and clean the bonding sheet;

[0017] S3: Twist the threaded piece to make a threaded connection between the threaded piece and the earmuff, so that the threaded piece drives the fixed piece to move toward the earmuff, so that the contact piece and the fixed piece away from the earmuff fit each other, so that the contact piece can transmit the sound to the fixed piece close to the inside of the ear.

[0018] The technical effects achieved by the present invention are:

[0019] The present invention can not only automatically clean the position in contact with the patient to reduce the risk of cross infection, but also reduce the impurities at the position of the fitting piece through the cleaning setting, thereby improving the clarity of the doctor's listening to the patient's heartbeat, and can adjust the sound volume of the stethoscope contacting the doctor's ear to meet the hearing needs of different doctors and make a more accurate diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure between the placement block, the bonding sheet and the first spring in the present invention;

[0022] Figure 3 It is a schematic diagram of the structure between the sliding tube, the fixed tube and the air guide block in the present invention;

[0023] Figure 4 The present invention Figure 3 The enlarged view of point A in the middle;

[0024] Figure 5 is a schematic diagram of the structure between the middle ear wearer and the ear pad of the present invention;

[0025] Figure 6 is a schematic diagram of the structure between the contact sheet, the fixing sheet and the ear pad in the present invention;

[0026] Figure 7 It is a schematic diagram of the structure among the fixing plate, the spacing groove and the filling ring in the present invention.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Ear wearer; 2. Connecting tube; 3. Placement block; 4. Fitting sheet; 5. Sliding ring; 6. Sliding tube; 7. Fixed tube; 8. Air guide block; 9. First cavity; 10. Second cavity; 11. Third cavity; 12. Air guide port; 13. Sliding blocking block; 14. Connecting port; 15. First spring; 16. Air guide groove; 17. Mounting frame; 18. Fourth cavity; 19. Abutting annular plate; 20. Iron ball; 21. Second spring; 22. Electromagnet; 23. Threaded sheet; 24. Contact sheet; 25. Fixed sheet; 26. Spacing groove; 27. Support bar; 28. Filling ring; 29. ​​Arc surface; 30. In-ear pad; 31. Air bag; 32. Guide slope. DETAILED DESCRIPTION

[0029] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0030] Embodiment 1:

[0031] See attached Figure 1 -Attached Figure 7 A self-cleaning cardiac stethoscope comprises an earpiece 1, a connecting tube 2 is mounted on one end of the earpiece 1, a placement block 3 is mounted on one end of the connecting tube 2, a fitting sheet 4 is mounted on the end of the placement block 3 away from the connecting tube 2, the fitting sheet 4 is used to fit the heart of the patient, a film is pasted on the side of the fitting sheet 4 away from the placement block 3, through this arrangement, the film can be torn off after being used for a long time, and a new film can be pasted, so as to further ensure that the fitting sheet 4 is always clean, and both ends of the earpiece 1 away from the connecting tube 2 are mounted with ear pads 30;

[0032] When constructing the device, the fitting sheet 4 on the placement block 3 can be fitted to the patient's heart, and the earmuff 1 and the ear pad 30 can be worn on the ear. The sound is transmitted through the connecting tube 2 and the earmuff 1, so that the doctor can hear the patient's heartbeat frequency, etc.

[0033] A cleaning mechanism is installed on the outer side of the placement block 3, and the cleaning mechanism is used to clean the bonding sheet 4;

[0034] See attached Figure 2-Figure 3The cleaning mechanism includes a sliding ring 5 slidably connected to the outside of the placement block 3, sliding tubes 6 are fixed on both sides of the sliding ring 5, a fixed tube 7 is slidably connected to the inside of the sliding tube 6 and one end close to the bonding sheet 4, an air guide block 8 is installed at the end of the fixed tube 7 away from the sliding tube 6, a first spring 15 is installed between the air guide block 8 and the sliding tube 6 and on the outside of the fixed tube 7, the air guide block 8 is fixed on the bonding sheet 4 and an air guide port 12 is arranged at the center position of the bonding sheet 4, and the air guide port 12 can be arranged to be inclined, so that the air guide port 12 can blow air at the center position of the bonding sheet 4, thereby cleaning the bonding sheet 4;

[0035] The first cavity 9, the second cavity 10 and the third cavity 11 are respectively arranged inside the sliding tube 6, the fixed tube 7 and the air guide block 8. A guide slope 32 is arranged on the inner wall of the third cavity 11 and on the side away from the fixed tube 7, and the guide slope 32 is inclined in the direction of the air guide port 12. Through this arrangement, the guide slope 32 can conduct the wind force inside the second cavity 10 to the air guide port 12, so as to guide the wind direction. An airbag 31 is fixed to the end of the sliding tube 6 away from the fixed tube 7. The airbag 31 is made of a flexible and deformable material and will not break easily. The material of 31 can be rubber, silicone, etc. The airbag 31 is connected to the first cavity 9. A communication port 14 is provided on the outside of the sliding tube 6 and near the fixed tube 7. A sliding block 13 is provided at one end of the fixed tube 7 near the sliding tube 6 and inside the sliding tube 6. The sliding block 13 is used to block the communication port 14. A fourth cavity 18 is provided inside the fixed tube 7 and near the first cavity 9. The fourth cavity 18 is respectively connected to the first cavity 9 and the second cavity 10. A blocking mechanism is provided in the fourth cavity 18. The blocking mechanism is used to block the fourth cavity 18.

[0036] See attached Figure 4The blocking mechanism includes a mounting frame 17 fixed inside the fourth cavity 18, and the mounting frame 17 is U-shaped, and the U-shaped opening of the mounting frame 17 faces the direction of the second cavity 10, and an air guide groove 16 is arranged between the fixed tube 7 and the mounting frame 17. Through the arrangement of the air guide groove 16, the wind inside the first cavity 9 can enter the fourth cavity 18 and enter the second cavity 10, and an electromagnet 22 is fixed inside the mounting frame 17, and a second spring 21 is fixed to the electromagnet 22 near the second cavity 10, and the second spring 2 An iron ball 20 is fixed at one end away from the electromagnet 22. When the electromagnet 22 is driven, the iron ball 20 can be adsorbed. A contact annular plate 19 is provided at a position of the fourth cavity 18 close to the second cavity 10. An opening is provided at the center of the contact annular plate 19. The iron ball 20 and the opening of the contact annular plate 19 contact each other. The opening is slightly smaller than the diameter of the iron ball 20. Therefore, the iron ball 20 will not pass through the opening inside the contact annular plate 19 under the elastic force of the second spring 21, but will block the opening.

[0037] When the doctor aligns the bonding sheet 4 on the placement block 3 with the patient's heart position, the doctor can take the sliding ring 5 and press the sliding tube 6 to drive the bonding sheet 4 to fit with the heart position. When the bonding sheet 4 abuts against the heart position, the sliding ring 5 continues to move forward and drives the sliding tube 6 to slide on the outside of the fixed tube 7. Relatively speaking, the sliding block 13 can slide on the inner wall of the first cavity 9. When the sliding block 13 slides until it exceeds the connecting port 14, the connecting port 14 can be blocked. At this time, the situation inside the fourth cavity 18 is that the second spring 21 bounces the iron ball 20 to a position close to the abutting annular plate 19 and blocks the opening on the abutting annular plate 19. At this time, the interior of the first cavity 9 is equivalent to a closed space. When the sliding block 13 and the fixed tube 7 move toward a position close to the airbag 31, the gas in the first cavity 9 can be guided to the interior of the airbag 31, and the airbag 31 is inflated.

[0038] When the doctor has measured the patient's heart problem, he loosens the sliding ring 5 and only takes the placement block 3. At this time, the sliding ring 5 is reset by the elastic force of the first spring 15. At this time, the electromagnet 22 can be started, so that the electromagnet 22 adsorbs the iron ball 20. After the iron ball 20 moves to the inside of the mounting frame 17, the opening position at the abutment ring plate 19 is in an open state, and the gas inside the airbag 31 is released into the first cavity 9. The sliding block 13 is subjected to the pressure of the gas stored inside the airbag 31, and moves toward the position close to the air guide block 8 through the setting of the first spring 15. At this time, the gas inside the first cavity 9 is guided to the fourth cavity 18, and enters the second cavity 10 and the third cavity 11 through the fourth cavity 18, and is blown to the bonding sheet 4 through the air guide port 12, so as to blow and clean the bonding sheet 4;

[0039] After the sliding block 13 moves to its reset position, the sliding block 13 can cancel the blockage of the connecting port 14, so that the first cavity 9 is connected to the outside air through the connecting port 14 again for air intake, and the electromagnet 22 is powered off again, canceling the attraction of the iron ball 20, and the iron ball 20 re-blocks the opening on the abutting annular plate 19.

[0040] See attached Figure 6-Figure 7 A plurality of fixing sheets 25 are arranged inside the ear pad 30, and a spacing groove 26 is arranged between every two adjacent fixing sheets 25. The plurality of fixing sheets 25 are connected by a plurality of supporting bars 27. A threaded sheet 23 is threadedly connected at a position near the fixing sheet 25 on the outside of the ear wearer 1, and the threaded sheet 23 is fixed to one of the outermost fixing sheets 25. A contact sheet 24 is fixed to the end of the ear wearer 1, and the contact sheet 24 is fitted to one of the fixing sheets 25. Both the fixing sheet 25 and the contact sheet 24 are made of metal, which has the advantage of good sound conduction, and can be made of metal iron, copper, etc.;

[0041] The user can listen to the sound by inserting the in-ear pad 30 into the ear. When the volume of the sound needs to be adjusted, the threaded piece 23 can be screwed to make the threaded connection between the threaded piece 23 and the ear wear device 1, so that the threaded piece 23 drives the fixing piece 25 to move toward the direction close to the ear wear device 1, so that the contact piece 24 and the fixing piece 25 away from the ear wear device 1 fit each other, and through the principle of sound conduction through solids, the contact piece 24 can conduct the sound to the fixing piece 25 close to the inside of the ear, and the sound is emitted through the fixing piece 25, so that the user can adjust the volume of the heartbeat sound. The support bar 27 is made of non-metallic material, such as plastic, etc. The spacing groove 26 is filled with a filling ring 28, and the left and right sides of the inner side of the filling ring 28 are provided with arc surfaces 29. The setting of the filling ring 28 prevents the contact piece 24 from being stuck between the two fixing pieces 25 when moving, and the setting of the arc surface 29 allows the arc surface 29 to guide the contact piece 24, further preventing the contact piece 24 from being stuck.

[0042] Embodiment 2:

[0043] A method for using a self-cleaning cardiac stethoscope, the method is used to self-clean the above cardiac stethoscope, and the method comprises the following steps:

[0044] When the doctor aligns the bonding sheet 4 on the placement block 3 with the patient's heart position, the doctor can take the sliding ring 5 and press the sliding tube 6 to drive the bonding sheet 4 to fit with the heart position. When the bonding sheet 4 abuts against the heart position, the sliding ring 5 continues to move forward and drives the sliding tube 6 to slide on the outside of the fixed tube 7. Relatively speaking, the sliding block 13 can slide on the inner wall of the first cavity 9. When the sliding block 13 slides until it exceeds the connecting port 14, the connecting port 14 can be blocked. At this time, the situation inside the fourth cavity 18 is that the second spring 21 bounces the iron ball 20 to a position close to the abutting annular plate 19 and blocks the opening on the abutting annular plate 19. At this time, the interior of the first cavity 9 is equivalent to a closed space. When the sliding block 13 and the fixed tube 7 move toward a position close to the airbag 31, the gas in the first cavity 9 can be guided to the interior of the airbag 31, and the airbag 31 is inflated.

[0045] When the doctor has measured the patient's heart problem, he loosens the sliding ring 5 and only takes the placement block 3. At this time, the sliding ring 5 is reset by the elastic force of the first spring 15. At this time, the electromagnet 22 can be started, so that the electromagnet 22 adsorbs the iron ball 20. After the iron ball 20 moves to the inside of the mounting frame 17, the opening position at the abutment ring plate 19 is in an open state, and the gas inside the airbag 31 is released into the first cavity 9. The sliding block 13 is subjected to the pressure of the gas stored inside the airbag 31, and moves toward the position close to the air guide block 8 through the setting of the first spring 15. At this time, the gas inside the first cavity 9 is guided to the fourth cavity 18, and enters the second cavity 10 and the third cavity 11 through the fourth cavity 18, and is blown to the bonding sheet 4 through the air guide port 12, so as to blow and clean the bonding sheet 4;

[0046] After the sliding block 13 moves to its reset position, the sliding block 13 can cancel the blockage of the connecting port 14, so that the first cavity 9 is connected to the outside air through the connecting port 14 again for air intake, and the electromagnet 22 is powered off again, canceling the attraction of the iron ball 20, and the iron ball 20 re-blocks the opening on the abutting annular plate 19.

[0047] The user can insert the in-ear pad 30 into the ear to listen to the sound. When the volume of the sound needs to be adjusted, the threaded piece 23 can be screwed to make the threaded connection between the threaded piece 23 and the ear wear device 1, so that the threaded piece 23 drives the fixing piece 25 to move toward the direction close to the ear wear device 1, so that the contact piece 24 and the fixing piece 25 away from the ear wear device 1 fit each other, and through the principle of sound conduction through solids, the contact piece 24 can conduct the sound to the fixing piece 25 close to the inside of the ear, and the sound is emitted through the fixing piece 25, so that the user can adjust the volume of the heartbeat sound.

[0048] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A self-cleaning cardiac stethoscope, comprising an ear wearer (1), characterized in that: A connecting tube (2) is installed at one end of the ear wear device (1), a placement block (3) is installed at one end of the connecting tube (2), a fitting sheet (4) is installed at one end of the placement block (3) away from the connecting tube (2), the fitting sheet (4) is used to fit the heart of the patient, and ear pads (30) are installed at both ends of the ear wear device (1) away from the connecting tube (2); A cleaning mechanism is installed on the outer side of the placement block (3), and the cleaning mechanism is used to clean the bonding sheet (4).

2. The cardiac stethoscope according to claim 1, characterized in that: The cleaning mechanism comprises a sliding ring (5) slidably connected to the outside of the placement block (3), sliding tubes (6) are fixed on both sides of the sliding ring (5), a fixed tube (7) is slidably connected inside the sliding tube (6) and at one end close to the bonding sheet (4), an air guide block (8) is installed at one end of the fixed tube (7) away from the sliding tube (6), a first spring (15) is installed between the air guide block (8) and the sliding tube (6) and at the outside of the fixed tube (7), the air guide block (8) is fixed on the bonding sheet (4) and is provided with an air guide port (12) at a position facing the center of the bonding sheet (4); The sliding tube (6), the fixed tube (7) and the air guide block (8) are respectively provided with a first cavity (9), a second cavity (10) and a third cavity (11); an air bag (31) is fixed to one end of the sliding tube (6) away from the fixed tube (7); the air bag (31) is communicated with the first cavity (9); a communication port (14) is provided on the outside of the sliding tube (6) and at a position close to the fixed tube (7); and an end of the fixed tube (7) close to the sliding tube (6) is provided with a communication port (14). A sliding block (13) is arranged inside the sliding tube (6), and the sliding block (13) is used to block the connecting port (14); a fourth cavity (18) is arranged inside the fixed tube (7) and close to the first cavity (9), and the fourth cavity (18) is communicated with the first cavity (9) and the second cavity (10) respectively; a blocking mechanism is arranged in the fourth cavity (18), and the blocking mechanism is used to block the fourth cavity (18).

3. The cardiac stethoscope according to claim 2, characterized in that: The blocking mechanism comprises a mounting frame (17) fixed inside the fourth cavity (18), and the mounting frame (17) is U-shaped, and the U-shaped opening of the mounting frame (17) faces the direction of the second cavity (10), an air guide groove (16) is arranged between the fixed tube (7) and the mounting frame (17), an electromagnet (22) is fixed inside the mounting frame (17), a second spring (21) is fixed to the electromagnet (22) in the direction close to the second cavity (10), and an iron ball (20) is fixed to one end of the second spring (21) away from the electromagnet (22), and an abutting annular plate (19) is arranged at a position of the fourth cavity (18) close to the second cavity (10), an opening is arranged at a central position of the abutting annular plate (19), and the iron ball (20) and the opening of the abutting annular plate (19) abut against each other.

4. The cardiac stethoscope according to claim 1, characterized in that: A plurality of fixing plates (25) are arranged inside the in-ear pad (30), a spacing groove (26) is arranged between every two adjacent fixing plates (25), the plurality of fixing plates (25) are connected to each other via a plurality of supporting bars (27), a threaded plate (23) is threadedly connected to the outer side of the earmuff (1) and close to the fixing plates (25), and the threaded plate (23) is fixed to one of the outermost fixing plates (25), and a contact plate (24) is fixed to the end of the earmuff (1), and the contact plate (24) is in contact with one of the fixing plates (25).

5. The cardiac stethoscope according to claim 1, characterized in that: A film is adhered to the side of the bonding sheet (4) away from the placement block (3).

6. The cardiac stethoscope according to claim 2, characterized in that: A guide slope (32) is provided on the inner wall of the third cavity (11) and on a side away from the fixed tube (7), and the guide slope (32) is inclined in the direction of the air guide port (12).

7. The cardiac stethoscope according to claim 4, characterized in that: The spacing groove (26) is filled with a filling ring (28), and arc surfaces (29) are provided on both left and right sides of the inner side of the filling ring (28).

8. A method for using a self-cleaning cardiac stethoscope, characterized in that: The method is used to self-clean the cardiac stethoscope according to any one of claims 1 to 7, and the method of use comprises the following steps: S1: Pressing the sliding ring (5) and the sliding tube (6) can guide the gas in the first cavity (9) to the inside of the airbag (31), and make the airbag (31) expand; S2: Release the sliding ring (5) and only take the placement block (3). At this time, the sliding ring (5) is reset by the elastic force of the first spring (15). At this time, the electromagnet (22) can be started so that the electromagnet (22) adsorbs the iron ball (20). After the iron ball (20) moves to the inside of the mounting frame (17), the opening position at the abutment ring plate (19) is in an open state. The gas inside the air bag (31) is blown to the bonding sheet (4) through the air guide port (12), thereby blowing and cleaning the bonding sheet (4); S3: The threaded piece (23) is screwed, thereby forming a threaded connection between the threaded piece (23) and the earmuff (1), so that the threaded piece (23) drives the fixing piece (25) to move in a direction close to the earmuff (1), thereby making the contact piece (24) and the fixing piece (25) in a direction away from the earmuff (1) fit each other, so that the contact piece (24) can transmit sound to the fixing piece (25) close to the inside of the ear.

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