CN107517422A - Muffler and the noise reduction earplug for including it - Google Patents

Muffler and the noise reduction earplug for including it Download PDF

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Publication number
CN107517422A
CN107517422A CN201710938142.6A CN201710938142A CN107517422A CN 107517422 A CN107517422 A CN 107517422A CN 201710938142 A CN201710938142 A CN 201710938142A CN 107517422 A CN107517422 A CN 107517422A
Authority
CN
China
Prior art keywords
chamber
stopper
muffler
conduction
conduction chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710938142.6A
Other languages
Chinese (zh)
Other versions
CN107517422B (en
Inventor
顾少荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangyin Ideal Plastic Protection Technology Co Ltd
Original Assignee
Jiangyin Ideal Plastic Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangyin Ideal Plastic Protection Technology Co Ltd filed Critical Jiangyin Ideal Plastic Protection Technology Co Ltd
Priority to CN201710938142.6A priority Critical patent/CN107517422B/en
Priority to DE212017000344.8U priority patent/DE212017000344U1/en
Priority to PCT/CN2017/108302 priority patent/WO2019061639A1/en
Publication of CN107517422A publication Critical patent/CN107517422A/en
Application granted granted Critical
Publication of CN107517422B publication Critical patent/CN107517422B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/08—Protective devices for the ears internal, e.g. earplugs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
    • A61F11/06—Protective devices for the ears
    • A61F11/08—Protective devices for the ears internal, e.g. earplugs
    • A61F11/085—Protective devices for the ears internal, e.g. earplugs including an inner channel
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/04—Acoustic filters ; Acoustic resonators
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/105—Manufacture of mono- or stereophonic headphone components

Abstract

The invention discloses a kind of muffler and include its noise reduction earplug, muffler includes cock body and stopper, the remote ear end of cock body is provided with sound chamber, the edge for holding together sound chamber has the chamfering to stretch out, conduction chamber is offered in cock body, conduction chamber is placed in the rear side of sound chamber, it is a cylinder or reverse taper to conduct chamber, conduction intracavitary plug is provided with stopper, stopper fits with conduction chamber, stopper is a cylinder or cone, and the outer surface of stopper offers a groove run through vertically, and the inner surface of groove and conduction chamber on the outer surface of stopper forms noise rejection chamber.The present invention is while hazardous noise is completely cut off, in the range of partial sound intensity in need is maintained at and can rationally obtained by human ear by and can.

Description

Muffler and the noise reduction earplug for including it
Technical field
The present invention relates to the technical field of the muffler for filtering noise, more particularly to a kind of muffler and including institute State the noise reduction earplug of muffler.
Background technology
The various requirements for hearing protection are more and more common in live and work at present, conventional various sponges, plastic cement ear Plug can reduce the decibel value of various sound.Research and development have by said minuscule hole to reduce the penetrability of sound wave in the market at present, from And reaching reduces medium-high frequency intensity of sound, but because of the diffraction characteristic of sound wave, for component frequency particularly Middle and low frequency noise Reduction cannot be controlled effectively.
The content of the invention
The present invention is directed to problem and shortage existing for prior art, there is provided a kind of muffler and the noise reduction earplug for including it, While hazardous noise is completely cut off, in the range of partial sound intensity in need is maintained at and can rationally obtained by human ear by and can.
The present invention is that solve above-mentioned technical problem by following technical proposals：
The present invention provides a kind of muffler, and its feature is that it includes a cock body and a stopper, the remote ear end of the cock body Be provided with sound chamber, it is described hold together sound chamber edge there is the chamfering to stretch out, offer conduction chamber, the conduction in the cock body Chamber be placed in it is described hold together sound chamber rear side, the conduction chamber be a cylinder or reverse taper, and the intracavitary plug that conducts is provided with stopper, institute State stopper to fit with the conduction chamber, the stopper is a cylinder or cone, and the outer surface of the stopper is opened vertically Provided with a groove run through, the inner surface of groove and the conduction chamber on the outer surface of the stopper forms noise rejection chamber.
It is preferred that it is described hold together sound chamber with it is described conduction chamber junction set dust cap, the dust cap be brought into close contact in On the cock body or it is bonded on the cock body, at least one sound inlet is offered on the dust cap, the sound inlet is distributed in The surface of the dust cap, and by it is described hold together sound chamber with it is described conduction chamber be connected.
It is preferred that the dust cap is in mushroom, the dust cap has relatively large block and relatively thin bullet Property plug handle, the resilient plug handle mutually fixed with the block, and the block is covered in the outside of the conduction chamber, the resilient plug handle Stretch into and be clamped on the conduction intracavitary, the sound inlet is extended in the resilient plug handle from the block, and by it is described hold together Sound chamber is connected with the conduction chamber.
It is preferred that the inner chamber of the resilient plug handle is hollow, the sound inlet is that groove type is distributed in the block Inner side, the sound inlet pass through the binding site of the resilient plug handle and the block and extend to the hollow of the resilient plug handle Interior intracavitary.
It is preferred that the resilient plug handle is non-full-circle spray pattern, the sound inlet is the inner side that groove type is distributed in the block, The sound inlet is through the resilient plug handle and the binding site of the block and extends in the resilient plug handle.
It is preferred that the conduction chamber is reverse taper, the stopper is cone, and the cone gradient of the stopper is equal to described Conduct the chamber cones gradient of chamber；Or the conduction chamber is cylinder, the stopper is cone；Or the conduction chamber For cone, the stopper is cylinder；The conduction chamber and the stopper are cylinder.
It is preferred that the big end of the conduction chamber is nearly ear end, small end is remote ear end, the big end of the stopper is nearly ear end, Small end is remote ear end, and the outside diameter of the conduction chamber be 0.5~4mm, and the end diameter for conducting chamber is 0.5~4mm, institute The length for stating conduction chamber is 5~25mm.
It is preferred that the outside diameter of the conduction chamber be 2mm, the end diameter for conducting chamber is 1.8mm, the conduction The length of chamber is 12mm.
It is preferred that the internal diameter of the diameter of the stopper and the conduction chamber matches, the length of the stopper is 1mm- 25mm。
It is preferred that the depth of the groove is 0.01~0.5mm.
It is preferred that the outer surface of the cock body is in three-stage, it is irregular polyhedronses end, intermediate connector and plug respectively Enter end, described to fill in end generally taper, the cone outside diameter for filling in end is more than the diameter of the intermediate connector.
The present invention also provides a kind of noise reduction earplug, and its feature is, it includes above-mentioned muffler and earplug body, the ear Cock body has one or more layers fin, and the nearly ear end of the muffler is inserted in the filling in hole of the earplug body, described to fill in The internal diameter in hole is less than the external diameter at the nearly ear end of the muffler.
It on the basis of common sense in the field is met, above-mentioned each optimum condition, can be combined, it is each preferably real to produce the present invention Example.
The positive effect of the present invention is：
For the present invention while hazardous noise is completely cut off, partial sound intensity in need is maintained at by and can rationally can be by people In the range of ear obtains.
Brief description of the drawings
Fig. 1 is the structural representation of the muffler of present pre-ferred embodiments.
Fig. 2 is the structure decomposition figure of the muffler of present pre-ferred embodiments.
Fig. 3 is the sectional view of the muffler of present pre-ferred embodiments.
Fig. 4 is the structural representation of the dust cap of an embodiment of the present invention.
Fig. 5 is the structural representation of the dust cap of another embodiment of the present invention.
Fig. 6 and 7 is the structural representation of the dust cap of further embodiment of this invention.
Fig. 8 and 9 is the structural representation of the dust cap of another embodiment of the present invention.
Figure 10 and 11 is the structural representation of the cock body of another embodiment of the present invention.
Figure 12 and 13 is the structural representation of the noise reduction earplug of present pre-ferred embodiments.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
As Figure 1-3, the present embodiment provides a kind of muffler, is made up of cock body 1 and stopper 2.The remote ear of the cock body 1 End is provided with sound chamber 101, it is described hold together the edge of sound chamber 101 there is the chamfering to stretch out, be easy to external sound wave S1 to enter muffler； It is described hold together sound chamber 101 rear side be provided with conduction chamber 102, it is described conduction chamber 102 be a cylinder or reverse taper；The conduction chamber Stopper 2 is provided with 102, the stopper 2 is cylinder or cone.Coordinate to be more preferable, conduct 102 preferred reverse taper of chamber, stopper 2 It is preferred that cone.
Above-mentioned conduction chamber 102, stopper 2 shape selection, be mainly based upon stopper 2 fill in conduction chamber 102 in after, can be tight Closely connected conjunction；When meeting to be brought into close contact this condition, the conduction chamber 102 can be cylinder, and stopper 2 is cone；Or The conduction chamber 102 can be cone, and stopper 2 is cylinder；Even, the conduction chamber 102 and stopper 2 are all cylinder Body；Ensure after stopper 2 fills in conduction chamber 102, because of squeezing action, mutually can closely paste both walls in the axial direction Close.
The outside diameter of the conduction chamber 102 is 0.5~4mm, preferably 2mm；It is described conduction chamber 102 end diameter be 0.5~4mm, preferably 1.8mm；The length of the conduction chamber 102 is 5~25mm, preferably 12mm.
The stopper 2 is cylinder or cone, preferably cone, and the diameter of stopper 2 is the same as 102 conduction intracavitary footpath phases Together；The length of the stopper 2 is 1mm-25mm, preferably 3mm-8mm；The outer surface of the stopper 2 offers one and run through vertically Groove 201 (see Fig. 2)；The depth of the groove 201 is 0.01~0.5mm, according to actual use, preferably 0.1mm~0.3mm.
The cone gradient of the stopper 2 is equal to the chamber cones gradient of the conduction chamber 102；The small end warp of the stopper 2 The big end plug of the conduction chamber 102 enters in the conduction chamber 102；The outer surface of stopper 2 and the interior table of the conduction chamber 102 Face, it is brought into close contact；The inner surface of groove 201 and the conduction chamber 102 on the outer surface of stopper 2 forms noise rejection chamber 3；Institute State and hold together sound chamber 101 described in external sound wave S1 warps into the conduction chamber 102, form sound wave S2；The sound wave S2 is through the noise Restrain chamber 3 further to propagate into duct, because noise rejection chamber 3 is more long and narrow, can effectively to the noise in sound wave S2, Particularly middle low frequency noise is restrained, and so as to form relatively soft sound wave S3, is transmitted in ear.
The big end of the cone conduction chamber 102 is nearly ear end, and the small end of the conduction chamber 102 is remote ear end；The circle The big end of cone stopper 2 is nearly ear end, and the small end of the stopper 2 is remote ear end；So set after, stopper 2 be not easy by external force from Conduct in chamber 102 and take out.
Because noise rejection chamber 3 is slotted on its outer surface by the stopper 2 and formed, can be as needed, do It is relatively thin, it is longer, all kinds of noises can effectively be restrained, production technology is simpler, and manufacturing cost is relatively low.
As shown in figure 4, in order to prevent external impurities from entering in the conduction chamber 102 of cock body 1, filter effect is had an impact, And debris clears up the problem of difficult, dust cap 6 can be set with conducting the junction of chamber 102 in the sound chamber 101 that hold together of cock body 1, it is described Dust cap 6 is closely fitted on cock body 1 or is bonded on cock body 1；The dust cap 6 is provided with sound inlet 601, the sound inlet 601 are at least 1, are distributed in the surface of the dust cap 6, and will hold together sound chamber 101 and be connected with conduction chamber 102；It is described enter sound Hole 601, which is mainly risen, facilitates sound to enter conduction chamber 102, and and can prevents debris from entering in conduction chamber 102, therefore sound inlet 601 requires It is arranged in the region that the dust cap 6 is connected with the conduction chamber 102；The shape of the sound inlet 601 can be it is square, Circle, or other rule, irregular shapes.Preferably, sound inlet 601 is circle, and quantity is 1, is arranged on dust cap 6 Center.
As shown in 5 figures, the as another embodiment of dust cap 6 which is provided with sound inlet 601, the sound inlet 601 It can be abnormity fluting or other shapes, be not limited to above-mentioned square or circular.
Preferably, as shown in Figures 6 and 7, the dust cap 6 can also use mushroom form, have larger block 602, The block 602 is covered in the outside of conduction chamber 102；Thinner plug handle 603, plug handle can be stretched into conduction chamber 102, realized locking； Plug handle 603 has certain elasticity, is clamped in conduction chamber 102, convenient dismounting and replacing dust cap 6；Sound inlet 601 is from block 602 extend in plug handle 603, will hold together sound chamber 101 and are connected with conduction chamber 102；As shown in Figures 6 and 7, as preferable embodiment party Formula, to be hollow, the sound inlet 601 is the inner side that groove type is distributed in block 602 for the inner chamber of the plug handle 603, it is described enter Sound hole 601 is extended in the hollow cavity of plug handle 603 through plug handle 603 and the binding site of block 602.
Preferably, as shown in FIG. 8 and 9, as another embodiment, the plug handle 603 is non-full-circle spray pattern, it is described enter sound Hole 601 is the inner side that groove type is distributed in block 602；The sound inlet 601 passes through plug handle 603 and the binding site of block 602, Extend to the non-full circle position of plug handle 603；By the sound inlet 601 and the plug handle 603 of non-full-circle spray pattern, by the conduction chamber 102 with it is described hold together sound chamber 101 and the external world be connected.
In order to realize preferably hold together audio fruit, it is described hold together sound chamber 101 inclined-plane diameter below with it is described conduct chamber 102 it is upper Portion's diameter is consistent, i.e., it is described hold together sound chamber 101 inclined-plane be directly connected with the conduction chamber 102.
Meanwhile in order to ensure that the plug handle 603 of dust cap 6 can be reliably filled in the conduction chamber 102, the conduction chamber 102 top, i.e., with the position that is in contact of plug handle 603, be designed to the face being engaged with the plug handle 603, can be on The consistent cylinder of lower diameter；It can also be the taper that upper diameter is small, lower diameter is big, facilitate filling in for the plug handle 603； It can also be the taper that upper diameter is big, lower diameter is small, after the plug handle 603 is filled in, spring expanding, prevent unexpected de- Fall；Even other bumps is complex-curved, and mainly convenient plug handle 603 is filled in, and prevents it from coming off.
It is the another embodiment of cock body 1 as shown in Figure 10,11, the cock body 1 equally has sound chamber 101 and passed Guide cavity 102；The outer surface of the cock body 1 is divided into 3 sections of positions, is irregular polyhedronses end 103 respectively, its polyhedron design side Just muffler body is held；Middle thinner connector 104, and fill in end 105；It is described to fill in the generally conical design of end 105, Conveniently fill in supporting earplug body, while the cone outside diameter for filling in end 105 is more than the diameter of connector 104, so exists By muffler by fill in end 105 fill in supporting earplug body after, due to connector 104 diameter be less than fill in end 105 cone Body outside diameter, earplug intracoelomic cavity is facilitated to block muffler herein, the reliability for contributing to muffler to install.
As shown in Figures 12 and 13, the present embodiment also provides a kind of noise reduction earplug, has 5 groups of above-mentioned muffler 4 and earplug body Conjunction forms；The nearly ear end of the muffler 4 is inserted in the filling in hole of the earplug body 5, and the internal diameter for filling in hole is less than institute State the external diameter at the nearly ear end of muffler 4；Earplug body 5 has one or more layers fin, and flexible plastic cement is made, and can effectively be bonded ear Road, external sound wave is set can be just transmitted into the ear after muffler filters.
Although the foregoing describing the embodiment of the present invention, it will be appreciated by those of skill in the art that these It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back On the premise of principle and essence from the present invention, various changes or modifications can be made to these embodiments, but these are changed Protection scope of the present invention is each fallen within modification.

Claims (12)

  1. A kind of 1. muffler, it is characterised in that it includes a cock body and a stopper, and the remote ear end of the cock body is provided with sound chamber, It is described hold together sound chamber edge there is the chamfering that stretches out, conduction chamber is offered in the cock body, the conduction chamber is placed in described Hold together the rear side of sound chamber, the conduction chamber is a cylinder or reverse taper, and the conduction intracavitary plug is provided with stopper, the stopper and institute State conduction chamber to fit, the stopper is a cylinder or cone, and the outer surface of the stopper offers one and run through vertically Groove, the inner surface of groove and the conduction chamber on the outer surface of the stopper forms noise rejection chamber.
  2. 2. muffler as claimed in claim 1, it is characterised in that it is described hold together sound chamber and the conduction chamber junction set it is anti- Dirt lid, the dust cap are brought into close contact on the cock body or being bonded on the cock body, and at least one is offered on the dust cap Individual sound inlet, the sound inlet are distributed in the surface of the dust cap, and by it is described hold together sound chamber be connected with the conduction chamber.
  3. 3. muffler as claimed in claim 2, it is characterised in that the dust cap is in mushroom, and the dust cap has phase To larger block and relatively thin resilient plug handle, the resilient plug handle is mutually fixed with the block, and the block is covered in institute The outside of conduction chamber is stated, the resilient plug handle stretches into and is clamped on the conduction intracavitary, and the sound inlet extends from the block To in the resilient plug handle, and by it is described hold together sound chamber be connected with the chamber that conducts.
  4. 4. muffler as claimed in claim 3, it is characterised in that the inner chamber of the resilient plug handle to be hollow, it is described enter sound Hole is the inner side that groove type is distributed in the block, and the sound inlet passes through the resilient plug handle and the binding site of the block And extend in the hollow cavity of the resilient plug handle.
  5. 5. muffler as claimed in claim 3, it is characterised in that the resilient plug handle is non-full-circle spray pattern, and the sound inlet is Groove type is distributed in the inner side of the block, and the sound inlet passes through the binding site of the resilient plug handle and the block and prolonged Extend in the resilient plug handle.
  6. 6. muffler as claimed in claim 1, it is characterised in that the conduction chamber is reverse taper, and the stopper is cone, The cone gradient of the stopper is equal to the chamber cones gradient of the conduction chamber；Or the conduction chamber is cylinder, the plug Rod is cone；Or the conduction chamber is cone, the stopper is cylinder；The conduction chamber and the stopper are Cylinder.
  7. 7. muffler as claimed in claim 1, it is characterised in that the big end of the conduction chamber is nearly ear end, small end is remote ear End, the big end of the stopper is nearly ear end, small end is remote ear end, and the outside diameter of the conduction chamber is 0.5~4mm, the biography The end diameter of guide cavity is 0.5~4mm, and the length of the conduction chamber is 5~25mm.
  8. 8. muffler as claimed in claim 7, it is characterised in that the outside diameter of the conduction chamber is 2mm, the conduction chamber End diameter be 1.8mm, it is described conduction chamber length be 12mm.
  9. 9. muffler as claimed in claim 8, it is characterised in that the internal diameter phase of the diameter of the stopper and the conduction chamber Match somebody with somebody, the length of the stopper is 1mm-25mm.
  10. 10. muffler as claimed in claim 1, it is characterised in that the depth of the groove is 0.01~0.5mm.
  11. 11. muffler as claimed in claim 1, it is characterised in that the outer surface of the cock body is in three-stage, is not advise respectively Then polyhedron end, intermediate connector and end is filled in, it is described to fill in end generally taper, the cone outside diameter for filling in end More than the diameter of the intermediate connector.
  12. 12. a kind of noise reduction earplug, it is characterised in that it includes the muffler and ear as described in any one in claim 1-11 Cock body, the earplug body have one or more layers fin, and what the nearly ear end of the muffler was inserted in the earplug body fills in hole Interior, the internal diameter for filling in hole is less than the external diameter at the nearly ear end of the muffler.
CN201710938142.6A 2017-09-30 2017-09-30 Muffler and noise reduction earplug comprising same Active CN107517422B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201710938142.6A CN107517422B (en) 2017-09-30 2017-09-30 Muffler and noise reduction earplug comprising same
DE212017000344.8U DE212017000344U1 (en) 2017-09-30 2017-10-30 Muffler and outside noise suppressing earplugs that surrounds them
PCT/CN2017/108302 WO2019061639A1 (en) 2017-09-30 2017-10-30 Sound attenuation device and noise-cancelling earplug having same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710938142.6A CN107517422B (en) 2017-09-30 2017-09-30 Muffler and noise reduction earplug comprising same

Publications (2)

Publication Number Publication Date
CN107517422A true CN107517422A (en) 2017-12-26
CN107517422B CN107517422B (en) 2024-04-02

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Application Number Title Priority Date Filing Date
CN201710938142.6A Active CN107517422B (en) 2017-09-30 2017-09-30 Muffler and noise reduction earplug comprising same

Country Status (3)

Country Link
CN (1) CN107517422B (en)
DE (1) DE212017000344U1 (en)
WO (1) WO2019061639A1 (en)

Cited By (3)

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CN108836630A (en) * 2018-06-28 2018-11-20 广东工业大学 A kind of noise elimination structure noiseproof earplug
US20220079813A1 (en) * 2020-09-11 2022-03-17 Triton Systems, Inc. Passive non-linear acoustic filters
JP7439885B2 (en) 2018-12-25 2024-02-28 株式会社Ｊｖｃケンウッド Earplug

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