CN215017383U - Noise-proof earplug for nuclear magnetic resonance examination - Google Patents
Noise-proof earplug for nuclear magnetic resonance examination Download PDFInfo
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- CN215017383U CN215017383U CN202121046311.3U CN202121046311U CN215017383U CN 215017383 U CN215017383 U CN 215017383U CN 202121046311 U CN202121046311 U CN 202121046311U CN 215017383 U CN215017383 U CN 215017383U
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model belongs to the technical field of medical instrument, a nuclear magnetic resonance is noise control earplug for inspection, including the earplug head, be equipped with the amortization structure on the earplug head, be equipped with the ear muff on the amortization structure terminal surface, be equipped with on the ear muff with ear muff fixed connection's supra-aural, the amortization mechanism is coniform and is equipped with the amortization layer in it, is equipped with the connecting wire of being connected with the earplug head in the amortization mechanism, the utility model discloses an utilize the sound wave between different materials and inside reflection, refraction and absorptive physical characteristic, fall through first puigging, soundproof cotton layer and amortization layer and make an uproar, fixed with the ear better with the earplug through the supra-aural.
Description
Technical Field
The utility model belongs to the technical field of medical equipment, concretely relates to nuclear magnetic resonance is noise control earplug for inspection.
Background
Nuclear magnetic resonance is a physical process in which nuclei with non-zero magnetic moments undergo zeeman splitting at a spin energy level under the action of an external magnetic field, and resonate to absorb radio-frequency radiation of a certain frequency. Nuclear magnetic resonance spectroscopy is a branch of spectroscopy in which the resonance frequency is in the radio frequency band and the corresponding transition is the transition of the nuclear spin on the nuclear zeeman level, and the nuclear magnetic resonance uses: magnetic Resonance Imaging (MRI) examination has become a common imaging examination method, and as a new imaging examination technology, MRI has no influence on human health, but six groups of people are not suitable for MRI examination: a person installing a cardiac pacemaker, a person with or suspected of having a metallic foreign body in an eyeball, a person ligating an aneurysm silver clip, a person retaining an in vivo object or a metallic prosthesis, a critically ill patient with life risk, a claustrophobic patient, and the like.
The FMRI combines three factors of function, anatomy and image, and provides powerful technical support for clinical mri from single morphology research to systematic research combined with functionality, generally referred to as the magnetic resonance imaging (BOLD-FMRI) technique that analyzes brain activity using the blood oxygen level dependence phenomenon, which refers to the fact that hemoglobin and oxygen in blood have different magnetic properties in different binding states. Hemoglobin exhibits diamagnetism when bound to oxygen (oxyhemoglobin), and paramagnetism when unbound to oxygen (deoxyhemoglobin). When the local deoxyhemoglobin is reduced, the fMRI image shows the increase of a T2 weighted signal, which is also the neurophysiological basis of the magnetic resonance functional imaging technology, and the application field of the functional magnetic resonance imaging technology relates to many fields of brain science research, such as cognitive science, brain neurology, drug abuse and the like; functional magnetic resonance technique can produce huge noise and cause huge misery for the patient at brain science research in-process its equipment, need take relevant equipment such as hood then the experimenter still need make corresponding action according to the instruction at the experimenter head in the brain science research in-process simultaneously, and traditional syllable-dividing earplug adopts the hood formula, and the experimenter can't wear, can not provide corresponding instruction information for the experimenter simultaneously.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an utilize sound wave between different materials and inside reflection, refraction and absorptive physical characteristic, fall through first puigging, soundproof cotton layer and amortization structure and make an uproar, utilize the earphone in the earplug to provide the nuclear magnetic resonance examination of action instruction for the patient with noise control earplug.
Based on the above purpose, the utility model adopts the following technical scheme: the utility model provides a nuclear magnetic resonance inspection is with noise control earplug, includes the earplug head, is equipped with canceling acoustic mechanical system on the earplug head, is equipped with the ear muff on the canceling acoustic mechanical system terminal surface, is equipped with the ear-hang with ear muff fixed connection on the ear muff, and canceling acoustic mechanical system is coniform and is equipped with the amortization layer in it, is equipped with the connecting wire of being connected with the earplug head in the canceling acoustic mechanical system.
Preferably, be equipped with the wiring hole on the ear muff, the ear muff includes the casing of making by plastics, and the sound insulation material that the cotton was made is inhaled by porous polyester fiber to the intussuseption of ear muff, and the ear muff is cylinder or cylindroid.
Preferably, the sound attenuating mechanism includes a housing; a cylindrical silencing structure layer is arranged in the silencing mechanism, and a first sound insulation layer, a silencing layer and a damping layer are coaxially arranged on the silencing structure layer from left to right; an air cavity is formed between the noise reduction structure layer and the shell, and a supporting plate fixedly connected with the shell is arranged in the air cavity.
Preferably, first puigging closely laminates with the ear muff, and first puigging intussuseption is filled with syllable-dividing sponge, is equipped with liquid in the shock attenuation layer, is equipped with in the earplug head with connecting wire electric connection's earphone.
Preferably, the noise reduction layer comprises a rubber layer tightly attached to the first noise reduction layer, an air layer made of PVC material is arranged on the end face of the rubber layer, a vacuum layer made of engineering plastic is arranged on the end face of the air layer, and a support column is arranged in the vacuum layer; the vacuum layer end face is provided with an air layer, the air layer end face is provided with a rubber layer, and the rubber layer, the air layer, the vacuum layer, the air layer and the rubber layer are sequentially and closely attached from left to right and coaxially arranged.
Preferably, the sound deadening layer is coaxially provided with a rubber layer, an air layer, a vacuum layer, an air layer and a sponge layer from left to right.
The utility model discloses to prior art, following beneficial effect has: the propagation of the vibration generated by the generator in the air or other substances is called as sound wave, the propagation of the sound wave is essentially the transmission of energy in the medium, the sound wave is mechanical wave, the sound wave cannot be propagated without the medium, the sound wave is absorbed and weakened when propagating in the medium, the gas absorbs most strongly and attenuates most strongly, the liquid absorbs the least and attenuates the least, the attenuation of the sound wave is mainly caused by three reasons, namely diffusion attenuation, absorption attenuation, internal friction between particles due to the viscosity of the medium when the sound wave propagates in the solid, so that a part of sound is converted into heat energy, meanwhile, heat exchange is carried out between dense and sparse parts of the medium, so that the loss of sound energy is caused, scattering attenuation is caused, and the attenuation of the sound wave caused by the existence of granular structures such as suspended particles and bubbles in the liquid, granular structures in the solid, defects, impurities and the like in the medium is called as scattering attenuation, the reflection can take place for the sound wave simultaneously when through different media, and the greater reflection of sound wave is big more than the acoustic reactance of two kinds of media differs, the utility model discloses an arranged puigging, noise damping layer and air chamber, the acoustic reactance between puigging and the noise damping layer simultaneously differs greatly for the sound wave is mostly reflected when propagating, and the transmission sound wave can reduce gradually, and the vacuum layer that the noise damping in situ portion set up simultaneously can the very big propagation that weakens the sound wave, and earplug head internally mounted has the earphone that adopts diamagnetic metal to make and is convenient for the staff and can receive the instruction and carry out corresponding action.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is an exploded view of the present invention;
FIG. 3 is a cross-sectional view of the silencing mechanism of the present invention;
FIG. 4 is an axial view of the silencing mechanism of the present invention;
FIG. 5 is an exploded view of the sound damping layer of the present invention;
fig. 6 is an exploded view of a sound-deadening layer according to example 2 of the present invention;
fig. 7 is an ear hook diagram according to embodiment 2 of the present invention;
in the figure: the ear-hang device comprises an ear-hang 1, an ear muff 2, an ear plug head 3, a sound attenuation mechanism 4, a shell 41, an air cavity 42, a first sound insulation layer 43, a sound attenuation layer 44, a rubber layer 441, an air layer 442, a vacuum layer 443, a support column 444, a sponge layer 445, a shock absorption layer 45, a sound attenuation structure layer 46 and a connecting line 5.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example one
As shown in fig. 1-2, the noise-proof earplug for nuclear magnetic resonance examination includes an earplug head 3, a silencing mechanism 4 is disposed on the earplug head 3, an earmuff 2 is disposed on an end surface of the silencing mechanism 4, an earhook 1 fixedly connected with the earmuff 2 is disposed on the earmuff 2, the silencing mechanism 4 is conical and is provided with a silencing layer 44 therein, and a connecting wire 5 connected with the earplug head 3 is disposed in the silencing mechanism 4.
The earmuffs 2 are provided with wiring holes, the earmuffs 2 comprise shells made of plastics, sound insulation materials made of porous polyester fiber sound absorption cotton are filled in the earmuffs 2, and the earmuffs 2 are cylindrical or elliptic cylindrical; be equipped with in the earplug head 3 with 5 electric connection's of connecting wire earphone, first puigging 43 closely laminates with ear muff 2, and first puigging 43 intussuseption is filled with the sound insulation sponge.
The connecting wire 5 passes through a wiring hole on the ear muff 2 to enter the silencing mechanism 4 and then enters the earplug head 3 through the silencing mechanism 4, and meanwhile, a control key for controlling the volume is arranged on the connecting wire 5;
as shown in fig. 3 to 5, the noise cancellation mechanism 4 includes a housing 41; a cylindrical silencing structure layer 46 is arranged in the silencing mechanism 4, and a first sound insulation layer 43, a silencing layer 44 and a damping layer 45 are coaxially arranged on the silencing structure layer 46 from left to right; an air cavity 42 is formed between the noise reduction structure layer 46 and the shell 41, and a supporting plate 47 fixedly connected with the shell 41 is arranged in the air cavity 42; the shock-absorbing layer 45 is internally provided with liquid,
the sound-absorbing layer 44 comprises a rubber layer 441 tightly attached to the first sound-absorbing layer 43, an air layer 442 made of PVC material as a shell is arranged on the end surface of the rubber layer 441, a vacuum layer 443 made of engineering plastic as a shell is arranged on the end surface of the air layer 442, and a support column 444 is arranged in the vacuum layer 443; the end face of the vacuum layer 443 is provided with an air layer 442, the end face of the air layer 442 is provided with a rubber layer 441, and the rubber layer 441, the air layer 442, the vacuum layer 443, the air layer 442 and the rubber layer 441 are sequentially and closely attached from left to right and coaxially arranged.
The sound wave is propagated into the ear muffs 2 through air, the sound insulation material in the ear muffs 2 is made of porous polyester fiber, when the sound wave passes through the sound insulation material, a part of energy is absorbed by the sound insulation material, when the sound wave propagates through the gaps, the sound wave is reflected and refracted for a plurality of times, when the sound wave propagates through the ear muffs 2 to the first sound insulation layer 43 and the air cavity 42 in the sound attenuation mechanism 4, the sound wave is partially absorbed by the air when entering the air cavity 42 through the ear muffs 2 for propagation, then the sound wave is reflected and refracted when propagating through the air cavity 42 to the first sound insulation layer 43, the energy of the refracted part enters the first sound insulation layer 43, when the sound wave propagates through the first sound insulation layer 43 through the ear muffs 2, the sound wave is reflected and absorbs a part of energy by the sound insulation sponge in the first sound insulation layer 43, then the sound wave propagating in the air cavity 42 loses a part of energy through reflection when propagating through the supporting plate 47 to the air cavity 42 of the second layer, the refracted part absorbs part of the energy by the air when entering the second air cavity 42, the sound wave propagates to the rubber layer 441 in the sound damping layer 44, a large number of micro-holes are arranged in the rubber layer 441, the sound wave absorbs and attenuates greatly when propagating in the rubber layer 441, the sound wave is reflected and refracted when propagating from the rubber layer 441 to the air layer 442, the sound wave absorbs part of the energy when propagating in the air layer 442, the part of the sound wave transmitting through the air layer 442 only propagates through the shell and the supporting columns 444 of the vacuum layer 443, the energy transmitted by the sound wave is further weakened, the sound wave reflects and refracts when entering the air layer 442, the energy of the sound wave is absorbed by the air in the air layer 42, the refracted part of the sound wave continues to propagate through the shell of the air layer 442 into the rubber layer 441, at the moment, most of the energy of the sound wave is reflected, refracted and scattered and dissipated, and the sound wave weakening most of the energy propagates to the earplug head 5, the earphone made of diamagnetic metal is installed in the earplug head 5, the earphone cannot be magnetized in a magnetic field, the silencing mechanism 4 is conical, the silencing mechanism 4 can conveniently enter the auditory canal and is fixed, and the voice instruction of functional magnetic resonance in the brain science research process is sent to the earphone of the earplug head 5 through a connecting wire to guide an experimenter to follow the voice instruction to make corresponding actions.
Example two
A noise-preventing earplug for nuclear magnetic resonance examination, as shown in FIGS. 6 to 7, a noise-suppressing layer 44 is provided coaxially with a rubber layer 441, an air layer 442, a vacuum layer 443, an air layer 442 and a sponge layer 445 from left to right as compared with example 1.
The sound wave is transmitted into the rubber layer 441 of the sound attenuation layer 44 through the first sound insulation layer 43, a large number of micro holes are arranged in the rubber layer 441, the sound wave is greatly absorbed and attenuated when being transmitted into the rubber layer 441, the sound wave is reflected and refracted twice when being transmitted into the air layer 442 from the rubber layer 441, the sound wave is partially absorbed by air when being transmitted into the air layer 442, the sound wave is only transmitted through the shell and the supporting columns 444 of the vacuum layer 443 when being transmitted into the vacuum layer 443, the energy transmitted by the sound wave is further attenuated, the sound wave is reflected and refracted when being transmitted into the air layer 442, the wave is partially absorbed by air when being transmitted into the air layer 442, the refracted part enters the sponge layer 445 through the shell of the air layer 442 to be continuously transmitted, the sponge layer 445 contains a large number of air holes, the sound wave can be effectively absorbed, and most of the energy of the sound wave is reflected, The sound wave that refracts and scattering dissipation weakens most energy passes through the sound wave and spreads to earplug head 5 department, and the ear-hang 1 adopts the circular arc structure to accord with human engineering more simultaneously, is convenient for the fixed of earplug.
The above description is only a preferred embodiment of the present invention, and only for the purpose of illustrating the aspects and effects of the present invention, which should not be considered as limiting the scope of the present invention, it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several changes and modifications can be made, and all should fall within the scope of the present invention.
Claims (6)
1. The utility model provides a nuclear magnetic resonance is noise control earplug for inspection, includes the earplug head, is equipped with canceling acoustic mechanical system on the earplug head, is equipped with the ear muff on the canceling acoustic mechanical system terminal surface, its characterized in that: the ear muffs are provided with ear hangers fixedly connected with the ear muffs, the silencing mechanism is conical, a silencing layer is arranged in the silencing mechanism, and a connecting wire connected with the ear plugs is arranged in the silencing mechanism.
2. The noise-proof earplug for nuclear magnetic resonance examination according to claim 1, wherein: be equipped with the wiring hole on the ear muff, the ear muff includes the casing of making by plastics, pack the sound insulation material who is made by porous polyester fiber sound absorption cotton in the ear muff, the ear muff is cylinder or elliptical cylinder.
3. The noise-proof earplug for nuclear magnetic resonance examination according to claim 2, wherein: the silencing mechanism comprises a shell; a cylindrical silencing structure layer is arranged in the silencing mechanism, and a first sound insulation layer, a silencing layer and a damping layer are coaxially arranged on the silencing structure layer from left to right; an air cavity is formed between the noise reduction structure layer and the shell, and a supporting plate fixedly connected with the shell is arranged in the air cavity.
4. The noise-proof earplug for nuclear magnetic resonance examination according to claim 3, wherein: first puigging with the ear muff closely laminates, and first puigging intussuseption is filled with syllable-dividing sponge, be equipped with liquid in the shock attenuation layer, be equipped with in the earplug head with connecting wire electric connection's earphone.
5. The noise-proof earplug for nuclear magnetic resonance examination according to claim 4, wherein: the noise reduction layer comprises a rubber layer tightly attached to the first noise insulation layer, an air layer made of PVC material is arranged on the end face of the rubber layer, a vacuum layer made of engineering plastic is arranged on the end face of the air layer, and a support column is arranged in the vacuum layer; the vacuum layer end face is provided with an air layer, the air layer end face is provided with a rubber layer, and the rubber layer, the air layer, the vacuum layer, the air layer and the rubber layer are sequentially closely attached from left to right and coaxially arranged.
6. The noise-proof earplug for nuclear magnetic resonance examination according to claim 5, wherein: the silencing layer is coaxially provided with a rubber layer, an air layer, a vacuum layer, an air layer and a sponge layer from left to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121046311.3U CN215017383U (en) | 2021-05-17 | 2021-05-17 | Noise-proof earplug for nuclear magnetic resonance examination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121046311.3U CN215017383U (en) | 2021-05-17 | 2021-05-17 | Noise-proof earplug for nuclear magnetic resonance examination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215017383U true CN215017383U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121046311.3U Expired - Fee Related CN215017383U (en) | 2021-05-17 | 2021-05-17 | Noise-proof earplug for nuclear magnetic resonance examination |
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| Country | Link |
|---|---|
| CN (1) | CN215017383U (en) |
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2021
- 2021-05-17 CN CN202121046311.3U patent/CN215017383U/en not_active Expired - Fee Related
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Granted publication date: 20211207 |