CN114071288A - Earplug with pressure regulating chamber and forming method thereof - Google Patents
Earplug with pressure regulating chamber and forming method thereof Download PDFInfo
- Publication number
- CN114071288A CN114071288A CN202010764685.2A CN202010764685A CN114071288A CN 114071288 A CN114071288 A CN 114071288A CN 202010764685 A CN202010764685 A CN 202010764685A CN 114071288 A CN114071288 A CN 114071288A
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- main body
- earplug
- air guide
- pressure regulating
- regulating chamber
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 14
- 210000000613 ear canal Anatomy 0.000 claims description 24
- 238000000465 moulding Methods 0.000 claims description 22
- 238000005192 partition Methods 0.000 claims description 14
- 239000012778 molding material Substances 0.000 claims description 8
- 238000004073 vulcanization Methods 0.000 claims description 4
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Images
Classifications
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- 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
- H04R1/1016—Earpieces of the intra-aural type
-
- 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
- H04R1/1058—Manufacture or assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/11—Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/15—Determination of the acoustic seal of ear moulds or ear tips of hearing devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Headphones And Earphones (AREA)
Abstract
The invention provides an earplug with a pressure regulating chamber and a forming method of the earplug, which are used for being installed on an earphone to be placed in a human auditory canal, the earplug is respectively formed with an outer main body by utilizing a first forming step, a sound outlet part, an outer wall part and a connecting part with at least one first air guide hole are formed on the outer main body, an inner main body is formed by utilizing a second forming step, an installation part and an umbrella part with at least one second air guide hole are formed on the inner main body, and at least one pressure regulating chamber which is respectively communicated with the first air guide hole and the second air guide hole is formed among the installation part, the sound outlet part, the umbrella part and the outer wall part by utilizing a combining step, so that the air pressure between the inside of the human auditory canal and the outside of the earphone is balanced through the pressure regulating chamber.
Description
Technical Field
The present invention relates to an earplug, and more particularly, to an earplug for mounting an earphone and being worn in an ear canal of a human body to improve comfort of wearing by air pressure adjustment.
Background
The earphone is divided into a wireless earphone and a wired earphone, and as the name suggests, the wireless earphone transmits voice by using a wireless transmission mode, and the wired earphone transmits voice through a wire.
No matter be wireless earphone or wired earphone, in order to promote the travelling comfort of wearing, can be provided with an earplug at the earphone one end that gets into human duct usually, because the earphone body is for the durability, adopts the plastics of stereoplasm to jet out usually and forms, if directly adopt hard material directly to fill in human duct, cause the injury of ear wall easily, also be unsuitable for wearing for a long time. Therefore, most earphones are additionally provided with earplugs formed by soft materials, so that the earphones are prevented from directly rubbing with the auditory canals of human bodies.
In addition, in order to improve the sound played by the earphone in the human auditory canal, the earphone can completely enter the human auditory canal, so that the earplug must be completely attached to the human auditory canal, and external noise can be prevented from entering the human auditory canal through a slit. Therefore, the earplug improves the sealing performance inside the human auditory canal, and causes the air pressure inside the human auditory canal to be overlarge, thereby causing discomfort (such as dizziness and the like) of the human body.
In order to improve such a situation, some conventional earphones have a mechanism for adjusting air pressure inside the earphone, and as disclosed in chinese patent publication No. 109236524a and publication No. CN206433116U, the earphone has a design for adjusting air pressure inside the earphone. However, these designs not only make the structure of the earphone more complicated, but also increase the manufacturing cost of the earphone. Therefore, part of the earplugs are provided with pressure outlet holes to discharge the air pressure inside the ear canal of the human body through the earplugs, as disclosed in taiwan patent No. I599234. Although this design, the manufacturing cost of saving the earphone that can be effectual and the mechanism of simplifying the earphone, these earplugs are worn in reality, receive the size restriction of human duct when the earplug gets into human duct inside easily for the earplug is totally closed, causes the inside atmospheric pressure of human duct and can't outwards discharge through pressure delivery hole, and the same can cause the discomfort in the human duct.
Therefore, how to provide an earplug which can effectively adjust air pressure to improve wearing comfort when being worn is the problem to be solved by the scheme.
Disclosure of Invention
The present invention provides an earplug, and more particularly, to an earplug for mounting an earphone in a human ear canal to improve comfort of wearing by adjusting air pressure.
To achieve the above objective, the present invention first provides an earplug with a pressure regulating chamber, which is used to be mounted on an earphone for being placed in an ear canal of a human body. The outer main body is provided with a generally annular sound outlet part, an outer wall part which surrounds the outer side of the sound outlet part and is used for being attached to the human auditory meatus and a connecting part which is connected between the sound outlet part and the outer wall part, so that a hollow cavity is formed inside the outer main body, and at least one first air guide hole is formed in the connecting part. The inner main body is provided with an installation part used for connecting the earphone and an umbrella part which extends outwards from the installation part and surrounds the outer side of the installation part, and at least one second air guide hole is formed in the umbrella part. The end face of the umbrella part is connected with an inner wall face of the outer wall part, so that at least one pressure regulating chamber communicated with the first air guide hole and the second air guide hole is formed between the outer main body and the inner main body; when the earplug enters the human ear canal, the air pressure inside the human ear canal can be balanced with the external air pressure by sequentially passing through the first air guide hole, the pressure regulating cavity and the second air guide hole.
In one embodiment, a first sound hole is formed in the center of the sound emitting portion, a second sound hole located at the same center as the first sound hole is formed in the mounting portion, and a fixing groove is formed in the second sound hole, wherein a diameter of the fixing groove is larger than a diameter of the second sound hole.
In an embodiment, the umbrella portion further includes at least two partition plates extending toward the interior of the pressure regulating chamber, and each partition plate is respectively connected to the mounting portion, the sound emitting portion, the connecting portion and the outer wall portion, so as to partition the pressure regulating chamber into two independent chambers through the two partition plates, and each independent chamber is respectively communicated with at least one of the first air guide holes and at least one of the second air guide holes.
In one embodiment, the first air hole and the second air hole are located at different centers, so that the first air hole and the second air hole are mutually staggered.
In one embodiment, the diameter of the first air vent and the second air vent is between 0.1mm and 1mm, and the volume of the pressure-regulating chamber is between 10 microliters and 100 microliters.
To achieve the above objective, the present invention further provides a method for forming a pressure-regulating chamber on an earplug, which includes a first forming step for forming an outer body, a second forming step for forming an inner body, and a combining step. The first forming step is to provide a first mold having a first upper mold base and a first lower mold base, and form a first forming space inside the first mold, and inject a forming material into the first forming space to form the outer body, so that the outer body has a substantially annular sound emitting portion, an outer wall portion surrounding the sound emitting portion and adapted to be attached to the ear canal of the human body, and a connecting portion connected between the sound emitting portion and the outer wall portion, and a hollow cavity is formed inside the outer body, and at least one first air guide hole is formed on the connecting portion. The second molding step is to provide a second mold having a second upper mold base and a second lower mold base, and form a second molding space inside the second mold, and inject molding material into the second molding space to form the inner main body, so that the inner main body has an installation portion and an umbrella portion extending outward from the installation portion and surrounding the installation portion, and at least one second air guide hole is formed on the umbrella portion. The combining step includes first removing the first lower die holder to leave the outer main body on the first upper die holder, then removing the second upper die holder to leave the inner main body on the second lower die holder, then mutually combining the first upper die holder and the second lower die holder to mutually combine the adjacent end faces of the sound outlet part and the mounting part, mutually combining one end face of the umbrella part and one inner wall face of the outer wall part to form at least one pressure regulating cavity communicated with the first air guide hole and the second air guide hole between the outer main body and the inner main body, and forming the earplug through the outer main body and the inner main body.
In one embodiment, the molding material is silicone.
In one embodiment, in the combining step, the sound emitting portion, the mounting portion and the umbrella portion are joined to each other by secondary vulcanization between the inner wall surfaces.
In one embodiment, the first air hole and the second air hole are located at different centers, so that the first air hole and the second air hole are mutually staggered.
In one embodiment, the diameter of the first air vent and the second air vent is between 0.1mm and 1mm, and the volume of the pressure-regulating chamber is between 10 microliters and 100 microliters.
Drawings
Fig. 1 is a perspective view of an earplug of the invention.
Fig. 2 is a plan view of the earplug of the invention in an exploded condition.
Fig. 3 is a schematic front view of an earplug of the invention.
Fig. 4 is a rear schematic view of an earplug of the invention.
Fig. 5 is a first cross-sectional view of an earplug of the invention.
Fig. 6 is a second cross-sectional view of an earplug of the invention.
Fig. 7 is a first cross-sectional view of an earplug of the invention mounted on an earpiece and worn in a human ear canal.
Fig. 8 is a second cross-sectional view of an earplug of the invention mounted on an earpiece and worn in a human ear canal.
FIG. 9 is a flow chart illustrating the manufacturing method of the present invention.
FIG. 10 is a schematic cross-sectional view of a first mold of the present invention.
FIG. 11 is a schematic cross-sectional view of a second mold of the present invention.
Fig. 12 is a schematic cross-sectional view of the first upper die base and the second lower die base in a separated state according to the present invention.
Fig. 13 is a schematic cross-sectional view of the first upper die base and the second lower die base in a molding state according to the present invention.
FIG. 14 is a schematic cross-sectional view of two independent spaces formed by the pressure-regulating chamber according to the present invention.
FIG. 15 is a schematic cross-sectional view of the pressure-regulating chamber of the present invention forming three separate spaces.
Description of the reference numerals
10 earplug
11 pressure regulating chamber
20 outer body
21 sound output part
211 first sound outlet
22 outer wall part
23 connecting part
231 first air guide hole
24 hollow chamber
30 inner body
31 mounting part
311 second sound outlet
312 fixed slot
32 umbrella part
321 second air guide hole
33 baffle plate
40 earphone
50 human ear canal
60 first mould
61 first upper die base
62 first lower die holder
63 first forming space
70 second mold
71 second upper die base
72 second lower die holder
73 second forming space
S1 first Forming step
S2 second Forming step
S3 combination step
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Referring to fig. 1 to 8, the present invention first provides an earplug 10 having a pressure regulating chamber 11, the earplug 10 including an outer body 20 and an inner body 30 for being mounted on an earphone 40 and placed in an ear canal 50 of a human body.
The outer body 20 has a sound emitting portion 21, an outer wall portion 22 and a connecting portion 23. The sound emitting portion 21 is substantially in a ring shape, and a first sound emitting hole 211 is formed in the center. The outer wall 22 is disposed around the sound emitting portion 21, and the length of the outer wall 22 is greater than the length of the sound emitting portion 21. The connecting portion 23 is connected between the sound emitting portion 21 and the outer wall portion 22, and the connecting portion 23 has at least one first air hole 231, so that a hollow chamber 24 is formed inside the outer main body 20. In the present embodiment, the connecting portion 23 is disposed at one edge of the sound emitting portion 21 and the outer wall portion 22, and four first air vents 231 are disposed on the connecting portion 23, and the diameter of the first air vents 231 is between 0.1mm and 1 mm.
The inner body 30 is disposed in the hollow chamber 24 of the outer body 20, and has a mounting portion 31 and an umbrella portion 32. The mounting portion 31 is used to connect to the earphone 40 and connect to the other end of the sound emitting portion 21, the center of the mounting portion has a second sound emitting hole 311 located at the same center as the first sound emitting hole 211, and the second sound emitting hole 311 has a fixing groove 312 therein, the diameter of the fixing groove 312 is larger than that of the second sound emitting hole 311. The umbrella portion 32 extends from the mounting portion 31, and the umbrella portion 32 is provided with at least one second air hole 321. In the embodiment, the umbrella portion 32 is provided with four second air vents 321, and the centers of each first air vent 231 and each second air vent 321 are not located at the same center. In other words, each of the first air holes 231 and each of the second air holes 321 are disposed in a staggered manner, and the diameter of each of the second air holes 321 is between 0.1mm and 1 mm. In addition, the umbrella portion 32 is disposed on the other end edge of the mounting portion 31 connected to the sound emitting portion 21, and the end edge of the umbrella portion 32 is connected to the outer wall portion 22 of the outer body 20, so that the pressure regulating chamber 11 communicating with the first air guiding hole 231 and the second air guiding hole 321 is formed between the outer body 20 and the inner body 30 through the sound emitting portion 21, the connecting portion 23, the outer wall portion 22, the mounting portion 31 and the umbrella portion 32, and the volume of the pressure regulating chamber is 10 to 100 microliters (microliters).
When the earplug 10 is fixed to the earphone 40 through the mounting portion 31, the earplug 10 and the earphone 40 can be firmly combined through the fixing groove 312, and when the earplug is placed in the human ear canal 50, the air pressure inside the human ear canal 50 is greater than the air pressure outside the human ear canal 50, so that the air in the human ear canal 50 enters the pressure regulating chamber 11 through the first sound guiding hole 231, and is then discharged to the outside of the earplug 10 through the second sound guiding hole 321 (the air flow manner is shown by arrows in fig. 7 and 8). Therefore, through the flowing of the gas, not only the pressure inside the human ear canal 50 can be effectively reduced, but also the gas entering the pressure chamber 11 can be temporarily stored in the pressure chamber 11 due to the staggered design of the first gas guiding hole 231 and the second gas guiding hole 321, and an effective supporting force can be provided for the outer wall part 22 by using the temporarily stored gas inside the pressure chamber 11, so that the outer wall part 22 can be more attached to the inner wall surface of the human ear canal 50, and the comfort in wearing can be greatly increased.
In addition, when the earphone 40 plays sound, the pressure-regulating chamber can also be used as an external sound barrier in order to reduce the interference of external noise to the sound in the human ear canal. Therefore, the pressure regulating chamber controls the diameter of the first air guide hole and the diameter of the second air guide hole to be 0.1-1 mm in order to prevent external sound from entering the human auditory canal, and controls the volume of the pressure regulating chamber to be 10-100 microliters, so that the discharge time of the sound in the human auditory canal can be controlled to be 0.05 second (20Hz) lower than the human ear inserting line, and further, the separation of external bass is formed, and the tone quality of the earphone is improved.
As shown in fig. 1 to 13, in order to form the air pressure chamber 11 on the earplug 10, the present invention further provides a method for forming the earplug 20, which includes a first forming step S1, a second forming step S2 and a combining step S3. The first molding step S1 is to provide a first mold 60, where the first mold 60 includes a first upper mold base 61 and a first lower mold base 62, and after the first upper mold base 61 and the first lower mold base 62 are mutually molded, a first molding space 63 is formed, so that a molding material is injected into the first molding space 63 to form the outer body 20.
The second molding step S2 is to provide a second mold 70, where the second mold 70 is composed of a second upper mold base 71 and a second lower mold base 72, the second upper mold base 71 and the second lower mold base 72 are mutually molded to form a second molding space 73, and the molding material is injected into the second molding space 73 to form the inner main body 30. It should be noted that, in the present embodiment, the molding material is mainly silica gel, and the silica gel is melted and then injected into the first molding space 63 and the second molding space 73, respectively, and then cooled to form the outer body 20 and the inner body 30.
In the combining step S3, after the outer body 20 and the inner body 30 are respectively molded in the first mold 60 and the second mold 70, the first lower mold base 62 of the first mold 60 is removed to keep the outer body 20 in the first upper mold base 61, and then the second upper mold base 71 of the second mold 70 is removed to keep the inner body 30 in the second lower mold base 72. Then the first upper die holder 61 and the second lower die holder 72 are molded with each other, so that the mounting portion 31 and the sound emitting portion 21 are adjacent to each other, the umbrella portion 32 and the inner wall surface of the outer wall portion 22 are adjacent to each other, finally, the outer body 20 and the inner body 30 are vulcanized in the first upper die holder 61 and the second lower die holder 72 at the same time, so that the mounting portion 31 and the sound emitting portion 21 and the adjacent surfaces of the umbrella portion 32 and the outer wall portion 22 are connected to each other, and the pressure regulating chamber 11 is formed between the outer body 20 and the inner body 30 to form the earplug 10, and then the earplug 10 is taken off from the first upper die holder 61 and the second lower die holder 72, so that the earplug 12 with the pressure regulating chamber 11 can be formed.
It should be noted that, since the outer body 20 and the inner body 30 are respectively formed by silica gel and are connected to each other by a secondary vulcanization method to form the pressure regulating chamber 11 and are respectively communicated with the first air guide hole 231 and the second air guide hole 321, and the outer body 20 and the inner body 30 are made of the same material and are subjected to secondary vulcanization, a better bonding capability can be formed between the outer body 20 and the inner body 30, and the structural strength of the earplug 10 is greatly improved. And the earplug 10 made of silicone also provides good comfort when worn. Through the first air guide hole 231, the second air guide hole 321 and the pressure regulating chamber 11, not only the air inside the human ear canal 50 can be exhausted to achieve the air pressure balance, but also the air can be temporarily reserved in the pressure regulating chamber 11, so as to provide a supporting force for the outer wall part 22, and the outer wall part 22 is more attached to the human ear canal 50.
As shown in fig. 5, 6 and 14, in the present embodiment, two corresponding partition plates 33 are further disposed on the umbrella portion 32, each partition plate 33 extends from the umbrella portion 32 toward the interior of the pressure regulating chamber 11 and is connected to the mounting portion 31, the sound emitting portion 21, the outer wall portion 22 and the connecting portion 23, so that the pressure regulating chamber 11 is divided into two independent cavities by two partition plates 33, and each independent cavity is communicated with at least one first air guide hole 231 and at least one second air guide hole 321.
Finally, as shown in fig. 5, 6 and 15, in the present embodiment, three corresponding partition boards 33 are further disposed on the umbrella portion 32, each partition board 33 extends from the umbrella portion 32 toward the interior of the pressure regulating chamber 11, and is respectively connected to the mounting portion 31, the sound emitting portion 21, the outer wall portion 22 and the connecting portion 23, so that the pressure regulating chamber 11 is divided into three independent cavities by the three partition boards 33, and each independent cavity is respectively communicated with at least one first air guide hole 231 and at least one second air guide hole 321.
Therefore, the pressure adjusting chamber 11 is divided into a plurality of independent cavities by the arrangement of the different number of the partition plates 33, and each independent cavity is respectively communicated with at least one first air guide hole 231 and at least one second air guide hole 321, so that each independent cavity can individually adjust the air pressure.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An earplug having a pressure-regulating chamber for mounting on an earphone for placement in an ear canal of a human body, the earplug comprising:
the outer main body is provided with a generally annular sound outlet part, an outer wall part which surrounds the outer side of the sound outlet part and is used for being attached to the human auditory meatus and a connecting part which is connected between the sound outlet part and the outer wall part, so that a hollow cavity is formed inside the outer main body, and at least one first air guide hole is formed in the connecting part; and
an inner main body arranged in the hollow chamber of the outer main body, wherein the inner main body is provided with an installation part used for connecting the earphone and an umbrella part which extends outwards from the installation part and surrounds the outer side of the installation part, and at least one second air guide hole is formed on the umbrella part;
the end face of the umbrella part is connected with an inner wall face of the outer wall part, so that at least one pressure regulating chamber communicated with the first air guide hole and the second air guide hole is formed between the outer main body and the inner main body; when the earplug enters the human ear canal, the air pressure inside the human ear canal can be balanced with the external air pressure by sequentially passing through the first air guide hole, the pressure regulating cavity and the second air guide hole.
2. The earplug with the pressure regulating chamber as claimed in claim 1, wherein the sound emitting portion has a first sound emitting hole formed at a center thereof, and the mounting portion has a second sound emitting hole formed at a same center as the first sound emitting hole, and the second sound emitting hole has a fixing groove formed therein, and a diameter of the fixing groove is larger than a diameter of the second sound emitting hole.
3. The earplug with the pressure regulating chamber as claimed in claim 2, wherein the umbrella portion further comprises at least two partitions extending toward the interior of the pressure regulating chamber, and each of the partitions is respectively connected to the mounting portion, the sound outlet portion, the connecting portion and the outer wall portion to partition the pressure regulating chamber into two independent chambers, and each of the independent chambers is respectively connected to at least one of the first air guide holes and at least one of the second air guide holes.
4. The earplug with the pressure regulating chamber as claimed in claim 1, wherein the first air vent and the second air vent are located at non-same center, such that the first air vent and the second air vent are offset from each other.
5. The earplug with the pressure regulating chamber as claimed in claim 1, wherein the diameter of the first air vent and the second air vent is between 0.1-1 mm, and the volume of the pressure regulating chamber is between 10-100 μ l.
6. A method of forming a pressure-regulating chamber in an earplug, comprising:
a first molding step for molding an outer main body, which comprises providing a first mold having a first upper mold base and a first lower mold base, forming a first molding space in the first mold, and injecting molding material into the first molding space to form the outer main body, so that the outer main body has a generally annular sound emitting portion, an outer wall portion surrounding the sound emitting portion and adapted to be attached to the human ear canal, and a connecting portion connected between the sound emitting portion and the outer wall portion, and a hollow chamber is formed in the outer main body, and at least one first air guide hole is formed in the connecting portion;
a second molding step for molding an inner main body, providing a second mold with a second upper mold base and a second lower mold base, forming a second molding space in the second mold, injecting molding material into the second molding space to form the inner main body, so that the inner main body is provided with an installation part and an umbrella part which extends outwards from the installation part and surrounds the outer side of the installation part, and at least one second air guide hole is formed on the umbrella part; and
a combining step, removing the first lower die holder to leave the outer main body on the first upper die holder, removing the second upper die holder to leave the inner main body on the second lower die holder, then mutually molding the first upper die holder and the second lower die holder to mutually joint the adjacent end surfaces of the sound outlet part and the mounting part, mutually jointing one end surface of the umbrella part and one inner wall surface of the outer wall part, so as to form at least one pressure regulating cavity which is respectively communicated with the first air guide hole and the second air guide hole between the outer main body and the inner main body, and form the earplug through the outer main body and the inner main body.
7. The method of claim 6, wherein the molding material is silicone.
8. The molding method of an earplug with a pressure regulating chamber as claimed in claim 6, wherein in the bonding step, the sound emitting portion and the mounting portion and the umbrella portion are bonded to each other by secondary vulcanization.
9. The method of claim 6, wherein the first vent hole and the second vent hole are located in different centers, such that the first vent hole and the second vent hole are offset from each other.
10. The method of claim 9, wherein the first and second air vents have a diameter of 0.1-1 mm and the pressure chamber has a volume of 10-100 μ l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764685.2A CN114071288B (en) | 2020-08-03 | 2020-08-03 | Earplug with pressure regulating cavity and forming method of earplug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764685.2A CN114071288B (en) | 2020-08-03 | 2020-08-03 | Earplug with pressure regulating cavity and forming method of earplug |
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| Publication Number | Publication Date |
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| CN114071288A true CN114071288A (en) | 2022-02-18 |
| CN114071288B CN114071288B (en) | 2024-08-02 |
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| CN202010764685.2A Active CN114071288B (en) | 2020-08-03 | 2020-08-03 | Earplug with pressure regulating cavity and forming method of earplug |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115320108A (en) * | 2022-08-15 | 2022-11-11 | 通达（厦门）精密橡塑有限公司 | Ear cap and method of manufacturing replacement ear cap assembly |
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