A sound-conducting tube noise-reducing earplug

Abstract

The invention discloses a sound-conducting tube noise-reducing earplug, which relates to the technical field of ear protection. The device comprises a sound field separation sleeve and a sound-conducting tube; the sound field separation sleeve is provided with a nesting cavity, which is arranged along the axial extension of the sound field separation sleeve, and the nesting cavity runs through the axial ends of the sound field separation sleeve; the sound-conducting tube is sleeved in the sound field separation sleeve, and the sound-conducting tube is arranged in the nesting cavity; the two ends of the sound-conducting tube are respectively set as a sound input end and a sound output end; the sound input end extends out of the sound field separation sleeve, and the sound input end is connected to a hearing protector to be used; the sound output end is arranged in the sound field separation sleeve; the sound field separation sleeve is used to separate the sound field inside and outside the ear canal; the sound-conducting tube is connected to the hearing protector to conduct and optimize the sound transmitted from the hearing protector; the sound field separation sleeve is used to separate the sound field inside and outside the ear canal, absorb the sound energy outside the ear, and protect hearing; the sound-conducting tube conducts the sound processed by the hearing protector, improves the noise reduction performance and optimizes the transmission of the sound, and solves the problem that the existing earplugs cannot have both noise reduction performance and wearing comfort.

Description

Technical Field

[0001] The invention relates to the technical field of ear protection, and in particular to a sound guide tube noise reduction earplug. Background Art

[0002] As a common personal hearing protection device, earplugs have been widely used and developed in recent years. It should be clear that the ear is composed of the outer ear, ear canal, middle ear and inner ear. The perception of sound occurs in the inner ear, and before the sound reaches the middle ear, as the sound travels in the ear canal, the ear canal will reduce the volume of the sound, that is, the ear canal actively attenuates the sound to prevent hearing damage.

[0003] The noise in public environments is getting louder and louder. Long-term exposure to high-noise environments can cause hearing loss and seriously affect mental health. Generally speaking, hearing protection devices are suitable for noisy environments, such as ground staff at airports, construction workers on construction sites, people taking lunch breaks in noisy offices, etc.; earplugs mainly reduce or isolate external noise through passive noise reduction, and earplugs are made of different materials or have different sound channel designs, so the attenuation effect on sound transmission will be different.

[0004] Earplugs are generally made of silicone, highly elastic polyester or low-pressure foam materials, including memory foam. They are inserted into the ear canal and in close contact with the external auditory canal to prevent sound from entering the middle ear and inner ear, thereby achieving sound insulation.

[0005] Flexible earplugs made of memory foam are inserted into the ear canal to isolate external noise. Flexible earplugs have a good noise reduction effect on high frequencies, but a poor noise reduction effect on medium and low frequencies. The noise reduction sound range is small, and they are not suitable for scenes with complex noises. There are large restrictions on user use. Before using the flexible earplugs, they generally need to be rubbed and compressed by hand before they can be inserted into the ear canal. However, this operation can easily leave bacteria and dirt on the hands on the earplugs, which can easily cause bacterial infection in the ear canal during use, or they can easily be over-inserted into the external auditory canal during use, causing greater pressure on the ear canal during use, which can easily cause the user to feel oppressed and cause discomfort, that is, cause biological sensitivity, and are inconvenient to remove.

[0006] The prior art discloses a passive noise reduction earplug, including an earphone shell, the passive noise reduction earplug includes a cavity, the cavity is surrounded by the earphone shell, the cavity is divided into a plurality of cavity areas, and a small cavity or a main cavity is correspondingly arranged in the plurality of cavity areas, the small cavity is connected to the main cavity through a connecting hole, and is used to perform noise reduction processing on the external input noise signal to obtain a target noise reduction signal. Although this technology can reduce noise signals of medium and low frequencies and noise signals of special frequencies, the earplug shape designed by it only separates the internal and external sound fields of the ear canal through the convex arc at the end of the earplug, and only relies on this position as a single force point to fix the earplug. After long-term use, the ear canal will feel swollen, making the user feel uncomfortable and having an obvious foreign body sensation, which has a great impact on the user's comfort.

[0007] In summary, the applicant has found that the prior art has at least the following technical problems:

[0008] In the existing passive noise reduction technology of earplugs, there is a problem that noise reduction performance and wearing comfort cannot be achieved at the same time. Summary of the invention

[0009] The object of the present invention is to provide a sound-conducting tube noise reduction earplug to solve the problem in the existing earplug passive noise reduction technology that noise reduction performance and wearing comfort cannot be achieved at the same time.

[0010] The various technical effects that can be produced by the preferred technical solutions among the various technical solutions provided by the present invention are described in detail below.

[0011] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0012] The present invention provides a sound-conducting tube noise-reducing earplug, comprising a sound field separation sleeve and a sound-conducting tube; the sound field separation sleeve is provided with a nesting cavity, the nesting cavity is arranged along the axial extension of the sound field separation sleeve, and the nesting cavity passes through the two axial ends of the sound field separation sleeve; the sound-conducting tube sleeve is bonded and attached to the sound field separation sleeve, and the sound-conducting tube is arranged in the nesting cavity; the two ends of the sound-conducting tube are respectively set as a sound input end and a sound output end; the sound input end extends out of the sound field separation sleeve, and the sound input end is connected to a hearing protector to be used; the sound output end is arranged in the sound field separation sleeve; the sound field separation sleeve is used to separate the sound fields inside and outside the ear canal; the sound-conducting tube is connected to the hearing protector to conduct and optimize the sound transmitted from the hearing protector.

[0013] In one of the embodiments, the sound guide tube includes a connecting section and a sound attenuating section which are connected in sequence; the sound input end is arranged at the entrance of the connecting section, and the sound output end is arranged at the exit of the sound attenuating section; the connecting section and the sound attenuating section are both conical in shape; and the diameter of the sound guide tube is gradually reduced from the sound input end to the sound output end.

[0014] In one of the embodiments, a connecting thread is provided on the inner wall of the connecting section, or 2 to 4 circles of clamping rings with gradually decreasing diameters are provided along the direction from the sound input end to the inner cavity.

[0015] In one embodiment, the inner cavity of the sound attenuation section is conical in shape, and the inner cavity diameter of the sound attenuation section gradually decreases along the direction from the connecting section to the sound output end;

[0016] The inner cavity surface of the sound attenuation section is a smooth surface.

[0017] In one of the embodiments, the inner cavity shape of the sound attenuation section is conical, and the inner cavity diameter of the sound attenuation section gradually decreases from the connecting section to the sound output end; the inner cavity surface of the sound attenuation section is evenly arranged with triangular pyramidal protrusions.

[0018] In one of the embodiments, the sound guide tube is made of silicone rubber.

[0019] In one embodiment, the hardness of the silicone rubber of the sound guide tube is 30 degrees to 70 degrees.

[0020] In one of the embodiments, the sound field separation sleeve includes a guide section and a matching section connected in sequence; the two ends of the sound field separation sleeve are respectively set as an in-ear end and a connecting end, the in-ear end is arranged on the guide section, and the connecting end is arranged on the matching section; the sound input end is arranged outside the connecting end; the sound output end is arranged inside the guide section; the in-ear end is provided with a funnel hole connected to the nested cavity, and the arrangement direction of the funnel hole from the large end to the small end is arranged along the direction extending from the in-ear end to the nested cavity.

[0021] In one of the embodiments, in the direction from the in-ear end to the connecting end, the cross-sectional shape of the guide section is a convex arc with a gradually increasing diameter; in the direction from the in-ear end to the connecting end, the cross-sectional shape of the mating section is a concave arc with a diameter that changes from large to small and then to large.

[0022] In one of the embodiments, the sound field separation sleeve is made of polyurethane foam sponge.

[0023] The beneficial effects of the present invention are as follows:

[0024] The sound-conducting tube noise-reducing earplug comprises a sound field separation sleeve and a sound-conducting tube; wherein, a nesting cavity is provided in the sound field separation sleeve, the nesting cavity is arranged along the axial extension of the sound field separation sleeve, and the nesting cavity passes through the axial ends of the sound field separation sleeve; the sound-conducting tube sleeve is bonded into the sound field separation sleeve, and the sound-conducting tube is arranged in the nesting cavity; therefore, the function of the sound field separation sleeve is to separate the space inside and outside the ear, absorb the sound energy outside the ear, and protect the hearing.

[0025] The two ends of the sound guide tube are respectively set as the sound input end and the sound output end; the sound input end extends out of the sound field separation sleeve, and the sound input end is connected to the hearing protector to be used; the sound output end is arranged in the sound field separation sleeve; the sound field separation sleeve is used to separate the sound field inside and outside the ear canal; the sound guide tube is connected to the hearing protector to conduct and optimize the sound transmitted from the hearing protector; so the function of the sound guide tube is to connect the adapted hearing protector and fix the sound field separation sleeve. At the same time, the internal cavity of the sound guide tube and its inner wall surface are important channels for conducting and optimizing the sound after the hearing protector processes the sound.

[0026] During assembly, the sound field separation sleeve and the sound guide tube are bonded together by using a special adhesive. Specifically, the sound guide tube can be placed in a molding mold of the sound field separation sleeve, and the bonding is completed at the same time after the material filled into the sound field separation sleeve is formed. Since the sound field separation sleeve is made of polyurethane foam sponge, the sound field separation sleeve has a high compression ratio. When in use, after the sound guide tube is connected to the hearing protector, it is necessary to rub the part of the sound field separation sleeve to a size that can be easily inserted into the ear canal, and then wear it in the ear, and wait for the sound field separation sleeve to rebound to fill the ear canal. canal, the best noise reduction effect can be achieved; at the same time, because the sound field separation sleeve is rolled up and worn in the ear canal, the sound field separation sleeve will rebound, so that the shape of the sound field separation sleeve can perfectly adapt to the shape of the ear canal, avoiding long-term wearing of earplugs or irregular shape of earplugs in the ear canal, which causes the wearer of the earplug to have a foreign body sensation and affects the comfort of wearing the earplugs; the earplug with sound guide tube of the present invention optimizes the noise reduction effect and achieves the best, and also solves the problem of earplug wearing comfort. Therefore, compared with the prior art, it effectively solves the problem that the existing earplugs cannot have both noise reduction performance and wearing comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0029] Figure 2 It is a perspective view of the structure of the first embodiment of the present invention as a whole;

[0030] Figure 3 is a cross-sectional view of a sound field separation sleeve according to a first embodiment of the present invention;

[0031] Figure 4is a cross-sectional view of a sound guide tube provided with a connecting thread in the first embodiment of the present invention;

[0032] Figure 5 is a cross-sectional view of a sound guide tube provided with a clamp ring in the first embodiment of the present invention;

[0033] Figure 6 is the measured noise reduction curve of the first embodiment of the present invention;

[0034] Figure 7 is a cross-sectional view of a sound attenuation section of a sound guide tube according to a second embodiment of the present invention;

[0035] Figure 8 is a sectional view with labels of a sound field separation sleeve according to a third embodiment of the present invention;

[0036] Fig. 9 is a cross-sectional view with labels of a sound field separation sleeve and a sound guide tube of a third embodiment of the present invention;

[0037] Fig.10 It is a cross-sectional view of the in-ear end of the guide section of the third embodiment of the present invention.

[0038] The reference numerals are as follows:

[0039] 1. Sound field separation sleeve; 11. Nested cavity;

[0040] 2. Guide section; 21. Ear end; 22. Funnel hole;

[0041] 3. Matching section; 31. Connecting end;

[0042] 4. Sound guide tube; 41. Sound input end; 42. Sound output end;

[0043] 5. Connecting section; 51. Connecting thread; 52. Snap ring;

[0044] 6. Sound attenuation section; 61. Triangular pyramidal protrusion. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0046] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] A specific embodiment provides a sound-conducting tube noise reduction earplug, which effectively solves the problem of existing earplug passive noise reduction technology that noise reduction performance and wearing comfort cannot be achieved at the same time.

[0048] Hereinafter, embodiments will be described with reference to the drawings. Note that all contents of the configurations shown in the following embodiments are not necessarily required as the solution to the invention described in the claims.

[0049] The first embodiment of the sound guide tube 4 noise reduction earplug is as follows Figures 1 to 4 As shown, it includes a sound field separation sleeve 1 and a sound guide tube 4; the sound field separation sleeve 1 is provided with a nested cavity 11, which is arranged along the axial extension of the sound field separation sleeve 1, and the nested cavity 11 passes through the axial ends of the sound field separation sleeve 1; the sound guide tube 4 is sleeved and bonded in the sound field separation sleeve 1, and the sound guide tube 4 is arranged in the nested cavity 11; the two ends of the sound guide tube 4 are respectively set as a sound input end 41 and a sound output end 42; the sound input end 41 extends out of the sound field separation sleeve 1, and the sound input end 41 is connected to the hearing protector to be used; the sound output end 42 is arranged in the sound field separation sleeve 1; the sound field separation sleeve 1 is used to separate the sound fields inside and outside the ear canal; the sound guide tube 4 is connected to the hearing protector to conduct and optimize the sound transmitted from the hearing protector.

[0050] Regarding the material used for the sound guide tube 4, the sound guide tube 4 is made of silicone rubber.

[0051] Regarding the material used for the above-mentioned sound field separation sleeve 1, the sound field separation sleeve 1 is made of polyurethane foam sponge.

[0052] When used, silicone rubber is an elastomer that can restore its original shape after deformation and removal of external force, and has the effects of anti-vibration and noise blocking.

[0053] On the one hand, polyurethane (PU) foam sponge has a loose porous structure with good sound absorption and reflection properties, and performs well in reducing noise; on the other hand, it is soft and elastic, and can provide good comfort and protection.

[0054] Among them, a nested cavity 11 is provided in the sound field separation sleeve 1, and the nested cavity 11 is arranged along the axial extension of the sound field separation sleeve 1, and the nested cavity 11 runs through the axial ends of the sound field separation sleeve 1; the sound guide tube 4 is sleeved and bonded in the sound field separation sleeve 1, and the sound guide tube 4 is arranged in the nested cavity 11; therefore, the function of the sound field separation sleeve 1 is to separate the space inside and outside the ear, absorb the sound energy outside the ear, and protect the hearing.

[0055] The two ends of the sound guide tube 4 are respectively set as a sound input end 41 and a sound output end 42; the sound input end 41 extends out of the sound field separation sleeve 1, and is connected to the hearing protector to be used; the sound output end 42 is arranged in the sound field separation sleeve 1; the sound field separation sleeve 1 is used to separate the sound field inside and outside the ear canal; the sound guide tube 4 is connected to the hearing protector to conduct and optimize the sound transmitted from the hearing protector; so the function of the sound guide tube 4 is to connect the adapted hearing protector and fix the sound field separation sleeve 1. At the same time, the internal cavity of the sound guide tube 4 and its inner wall surface are important channels for conducting and optimizing the sound after the hearing protector processes the sound.

[0056] During assembly, the sound field separation sleeve 1 and the sound guide tube 4 are bonded together by using a special adhesive. Specifically, the sound guide tube 4 can be placed in the molding mold of the sound field separation sleeve 1, and the bonding is completed at the same time after the material filled with the sound field separation sleeve 1 is formed; since the sound field separation sleeve 1 is made of polyurethane foam sponge, the sound field separation sleeve 1 has a high compression ratio. When in use, after the sound guide tube 4 is connected to the hearing protector, it is necessary to rub the part of the sound field separation sleeve 1 to a size that can be easily inserted into the ear canal, and then wear it in the ear, wait for the sound field separation sleeve 1 to rebound to fill the ear canal, and then The best noise reduction effect is achieved; at the same time, because the sound field separation sleeve 1 is rolled into a thin layer and worn in the ear canal, the sound field separation sleeve 1 will rebound, so that the shape of the sound field separation sleeve 1 can perfectly adapt to the shape of the ear canal, avoiding long-term wearing of the earplugs or the irregular shape of the earplugs in the ear canal, which causes the wearer of the earplugs to feel a foreign body and affects the comfort of wearing the earplugs; the earplug with the sound guide tube 4 of the present invention optimizes the noise reduction effect and achieves the best, and also solves the problem of earplug wearing comfort. Therefore, compared with the prior art, it effectively solves the problem that the existing earplugs cannot have both noise reduction performance and wearing comfort.

[0057] As one optional implementation,

[0058] Regarding the specific structure of the sound guide tube 4, this embodiment Figure 4 As shown, the sound guide tube 4 includes a connecting section 5 and a sound attenuation section 6 which are connected in sequence; the sound input end 41 is arranged at the entrance of the connecting section 5, and the sound output end 42 is arranged at the exit of the sound attenuation section 6; the connecting section 5 and the sound attenuation section 6 are both conical in shape; the diameter of the sound guide tube 4 is gradually reduced from the sound input end 41 to the sound output end 42.

[0059] Regarding the specific structure of the position where the sound guide tube 4 is connected to the hearing protector, this embodiment Figure 4 and Figure 5 As shown, a connecting thread 51 is provided on the inner wall of the connecting section 5, or a clamping ring 52 with a diameter gradually reduced and 2 to 4 circles is provided along the direction from the sound inlet end 41 to the inner cavity.

[0060] When applied, the number of turns of the connecting thread 51 provided in the connecting section 5 can be selected from 1 to 4 turns, and different numbers of turns can be selected according to the size and height of the shape. Since the silicone rubber used in the sound guide tube 4 is an elastic body that can restore its original shape after deformation and removal of external force, it can be easily disassembled and assembled without destroying the original shape; according to the deformation characteristics of silicone rubber, in addition to providing the connecting thread 51 to enable the sound guide tube 4 connecting section 5 to the hearing protector to be effectively connected, a segmented concave-convex design can also be provided in the connecting section 5, that is, 2 to 4 turns of a gradually decreasing diameter clamping ring 52 are provided to obtain different clamping degrees, which is convenient for connecting the sound guide tube 4 to the hearing protector.

[0061] Regarding the specific structure of the sound attenuation section 6, this embodiment Figure 4 As shown, the inner cavity shape of the sound attenuation section 6 is conical, and the inner cavity diameter of the sound attenuation section 6 gradually decreases along the direction from the connecting section 5 to the sound output end 42; the inner cavity surface of the sound attenuation section 6 is a smooth surface.

[0062] When used, the sound guide tube 4 has a smaller inner diameter, and the smaller the size, the more the sound pressure level attenuates in some frequency bands; while the longer the length, the longer the size, and the more the frequency bands shift toward low frequencies and attenuate. This design adjusts the sizes between the two based on the above rules to achieve better results, so the inner cavity of the sound attenuation section 6 is designed, and its diameter is gradually reduced from the connecting section 5 to the sound outlet 42; the inner diameter size of the sound guide tube 4, the end face size of the inner diameter of the sound outlet 42 is d3=1.2mm, and the adjustable caliber is 1.0~3.6mm. The smaller the size, the better the sound pressure attenuation of the frequency band; and as for the length size h2, the longer the low-frequency attenuation is, h2=15.4mm, and the adjustable length is 12.2~16.8mm.

[0063] Regarding the noise reduction effect: When worn correctly, the average sound pressure level attenuation in the frequency range of 125Hz-8000Hz can reach 35.84dB. The reference value of the noise reduction rate NRR (Noise Reduction Rating) calculated by simulating the test data obtained by the set acoustic test fixture is about 32.3dB.

[0064] Among them Figure 6 As shown, it is the measured noise reduction curve, among which the pink curve (the top PINKNOISE) is the sound pressure curve without earplugs, and the following are 20 noise reduction curves after inserting the earplugs. Refer to the calculation formula of NRR: NRR = average noise attenuation of the sample - twice the standard deviation. The calculation result NRR = 32.3dB, see Table 1, that is, the effective noise reduction value reaches 32.3dB.

[0065]

[0066] Table 1

[0067] Furthermore, regarding the hardness of the silicone rubber used in the above-mentioned sound guide tube 4, the hardness of the silicone rubber of the sound guide tube 4 is 30 degrees to 70 degrees. Within this hardness range, when manufacturing the sound guide tube 4, the appropriate hardness can be selected according to the actual assembly fit.

[0068] During application, silicone rubber, as an elastic body, can restore its original shape after deformation and removal of external force, so it can be easily disassembled without destroying the original shape, and has the effect of anti-vibration and noise blocking. The color can be used interchangeably with the appearance color, including red, blue, purple, gray, white, black, brown, orange, yellow, and transitional gradient colors.

[0069] Regarding the specific structure of the sound field separation sleeve 1, this embodiment Figure 3 As shown, the sound field separation sleeve 1 includes a guide section 2 and a matching section 3 connected in sequence; the two ends of the sound field separation sleeve 1 are respectively set as an in-ear end 21 and a connecting end 31, the in-ear end 21 is arranged on the guide section 2, and the connecting end 31 is arranged on the matching section 3; the sound input end 41 is arranged outside the connecting end 31; the sound output end 42 is arranged in the guide section 2; the in-ear end 21 is provided with a funnel hole 22 connected to the nesting cavity 11, and the arrangement direction of the funnel hole 22 from the large end to the small end is arranged along the direction extending from the in-ear end 21 to the nesting cavity 11.

[0070] During use, a concave shape of the funnel hole 22 is designed at the head of the guide section 2, which can avoid the earplug's compression of the sound guide tube 4 during wearing, thereby ensuring that the sound transmission is not disturbed; at the same time, it also reduces the expansion of the guide section 2 in the ear canal, reduces the pressure on the ear canal, thereby reducing the contact and potential irritation to the ear canal skin, and can also maintain a good sound insulation effect, compatible with and simultaneously improving the noise reduction performance and wearing comfort of the earplug.

[0071] Regarding the appearance structure of the above-mentioned sound field separation sleeve 1, this embodiment is as follows Figures 1 to 3 As shown, in the direction from the ear inlet end 21 to the connecting end 31, the cross-sectional shape of the guide section 2 is a convex arc with a gradually increasing diameter; in the direction from the ear inlet end 21 to the connecting end 31, the cross-sectional shape of the matching section 3 is a concave arc with a diameter that increases from large to small to large.

[0072] When in use, the outer structure of the sound field separation sleeve 1 is a segmented arc design. The guide section 2 has a smaller diameter than the matching section 3, and the guide section 2 is bullet-shaped, which can be more easily inserted into the ear canal without damaging the skin it contacts; the matching section 3 is a smooth arc design, and the cross-sectional shape is a concave arc with a diameter from large to small to large. It can better fit the shape of the human ear canal to form a good sealing effect and reduce excessive pressure on the ear canal.

[0073] A second embodiment of the noise reduction earplug of the sound guide tube 4 is as follows Figure 7As shown, the difference between this embodiment and the first embodiment is that the inner cavity shape of the sound attenuation section 6 is conical, and the inner cavity diameter of the sound attenuation section 6 gradually decreases from the connecting section 5 to the sound output end 42; the inner cavity surface of the sound attenuation section 6 is evenly arranged with triangular pyramidal protrusions 61.

[0074] When used, the triangular pyramidal protrusions 61 are evenly arranged on the inner cavity surface, which has a sound-absorbing effect and is beneficial to further weaken and optimize the sound conducted in the sound guide tube 4.

[0075] A third embodiment of the noise reduction earplug of the sound guide tube 4 is as follows Figure 8 As shown, the difference between this embodiment and the first embodiment is that in order to provide users with more choices to adapt to the ear canal sizes of different user groups, so that most users can have the same noise reduction effect and better wearing experience, the earplugs are designed in small, medium and large sizes;

[0076] For the small (S) earplugs, the dimensions of the various structural parts are: D1 = 3.2 ± 0.2 mm, D2 = 9.5 ± 0.2 mm, D3 = 13.5 ± 0.2 mm, D4 = 14.5 ± 0.3 mm, H1 = 8.7 ± 0.5 mm, H2 = 14.3 ± 0.5 mm.

[0077] For the medium (M) earplug, the dimensions of each structure are: D1 = 3.2 ± 0.2 mm, D2 = 10.5 ± 0.2 mm, D3 = 14.5 ± 0.2 mm, D4 = 15.5 ± 0.3 mm, H1 = 8.7 ± 0.5 mm, H2 = 14.4 ± 0.5 mm.

[0078] For large (L) earplugs, the dimensions of each structure are: D1 = 3.2 ± 0.2 mm, D2 = 11.5 ± 0.2 mm, D3 = 15.5 ± 0.2 mm, D4 = 16.5 ± 0.3 mm, H1 = 8.7 ± 0.5 mm, H2 = 14.4 ± 0.5 mm.

[0079] For the size adjustment range of the tail of the matching section 3 of the sound field separation sleeve 1 and the tail of the connecting section 5 of the sound guide tube 4, as shown in Figure 9, H1=2.8mm, which can be adjusted upward to extend 0.5mm, and H2=5.6mm, which can be adjusted downward to extend up to 2.0mm.

[0080] For the head of the guide section 2 of the sound field separation sleeve 1, the dimensions of the concave shape of the designed funnel hole 22, as shown in Figure 10, d1, d2, h1, and r1 have different dimensions based on the sizes of earplugs of different specifications: d1 = 4.3 mm, adjustable dimension 3.0 to 5.0 mm; d2 = 6.4 mm, adjustable dimension 5.5 to 7.2 mm; h1 = 3.7 mm, adjustable dimension 3.0 to 4.5 mm; r1 = 70.8°, adjustable angle 45 to 80°.

[0081] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described.

[0082] The above is 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 principle of the present invention, and these improvements and modifications are also considered as the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A sound-conducting tube noise-reducing earplug, characterized in that: Including a sound field separation sleeve and a sound guide tube; The sound field separation sleeve is provided with a nesting cavity, the nesting cavity is arranged along the axial extension of the sound field separation sleeve, and the nesting cavity passes through the axial ends of the sound field separation sleeve; The sound guide tube is sleeved and bonded in the sound field separation sleeve, and the sound guide tube is arranged in the nesting cavity; The two ends of the sound guide tube are respectively set as a sound input end and a sound output end; the sound input end extends out of the sound field separation sleeve, and the sound input end is connected to the hearing protector to be used; the sound output end is arranged in the sound field separation sleeve; The sound field separation sleeve is used to separate the sound fields inside and outside the ear canal; The sound guide tube is connected to the hearing protector to conduct and optimize the sound transmitted from the hearing protector; The sound guide tube comprises a connecting section and a sound attenuating section which are connected in sequence; the sound input end is arranged at the entrance of the connecting section, and the sound output end is arranged at the exit of the sound attenuating section; The connecting section and the sound attenuation section are both conical in shape; the diameter of the sound guide tube is gradually reduced from the sound input end to the sound output end; The sound field separation sleeve comprises a guide section and a matching section which are connected in sequence; two ends of the sound field separation sleeve are respectively set as an in-ear end and a connecting end, the in-ear end is arranged on the guide section, and the connecting end is arranged on the matching section; The sound input end is arranged outside the connection end; the sound output end is arranged inside the guide section; The ear inlet end is provided with a funnel hole communicating with the nesting cavity, and the arrangement direction of the funnel hole from the large end to the small end is arranged along the direction extending from the ear inlet end to the nesting cavity.

2. The sound-conducting tube noise-reducing earplug according to claim 1, characterized in that: The inner wall of the connecting section is provided with connecting threads, or 2 to 4 circles of clamping rings with gradually decreasing diameters are provided along the direction from the sound input end to the inner cavity.

3. The sound-conducting tube noise-reducing earplug according to claim 1, characterized in that: The inner cavity shape of the sound attenuation section is conical, and the inner cavity diameter of the sound attenuation section gradually decreases along the direction from the connecting section to the sound output end; the inner cavity surface of the sound attenuation section is a smooth surface.

4. The sound-conducting tube noise-reducing earplug according to claim 1, characterized in that: The inner cavity shape of the sound attenuation section is conical, and the inner cavity diameter of the sound attenuation section gradually decreases along the direction from the connecting section to the sound output end; triangular pyramidal protrusions are evenly arranged on the inner cavity surface of the sound attenuation section.

5. The sound-conducting tube noise-reducing earplug according to claim 1, characterized in that: The sound guide tube is made of silicone rubber.

6. The sound-conducting tube noise-reducing earplug according to claim 5, characterized in that: The hardness of the silicone rubber of the sound guide tube is 30 degrees to 70 degrees.

7. The sound-conducting tube noise-reducing earplug according to claim 1, characterized in that: In the direction from the in-ear end to the connecting end, the cross-sectional shape of the guide section is a convex arc with a gradually increasing diameter; in the direction from the in-ear end to the connecting end, the cross-sectional shape of the matching section is a concave arc with a diameter that decreases from large to small and then increases to large.

8. The sound-conducting tube noise-reducing earplug according to claim 1, characterized in that: The sound field separation sleeve is made of polyurethane foam sponge.

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