CN2066731U - Ear protector for noise - Google Patents

Abstract

The utility model discloses an ear protector for continuous and impulse noise, comprising a dual-cavity cover body whose width is 15 mm, a liquid filled lattice-type ear pad, a head spring, a head spring height adjusting and folding mechanism, and a rotation mechanism; the head spring height adjusting and folding mechanism is composed of a head spring, a height adjustment bracket, a guide tube, and a head spring rotary shaft; the rotation mechanism is composed of a pressure cap, the rotary shaft of a cover body rotary disk, and a rotary disk ear shaft. The cover body has a ventilating noise declining mechanism composed of an air pipe, a noise absorption layer, and air holes; the inner cavity wall has pits. When the head spring clamping force of the ear cover is 4 Newton or 7 Newton, the noise declining t value is respectively 38 decibel or 42 decibel; if the total weight is 250 grams and the folded volume is 96*72*125 (mm+[3]), the ear protector can be worn comfortably and carried conveniently.

Description

Ear protector for noise

This utility model relates to ear protector (abbreviation earmuff), belongs to sound one damper or rather.

Existing earmuff, from use can be divided into prevent continuous noise with anti-impulsive noise.Shortcomings such as their majorities exist volume bigger than normal, and weight is heavier, and a bow folder power is big, and ear pad is wide are so the inconvenience of use is worn uncomfortable.If the time of wearing surpasses 2 hours, user has vexed, the dizzy and symptom such as feel sick of ear.In order to improve comfortableness, the earmuff labour contractor who has bends folder power and designs smallerly, but its acoustic attenuation value has just correspondingly reduced, and causes earmuff protection effect variation.

The anti-industrial continuous noise earmuff (seeing " noise control 114 examples " the 619th page, publishing house of Ministry of Labor and Personnel, 1985.9) that China produces at present is made up of plastics cover body, ear pad plate, ear pad, head bow and absorbent treatment.Single cavity body structure of its cover body, overall weight is lighter, but the acoustic attenuation value is undesirable, still exists volume big, the big deficiency that waits of a bow folder power.

(the Cosmcord ltd of Britain Coase Mo Kaote company, of waltham Cross, Hertfordshire) the AWSA9173 type earmuff of Sheng Chaning (is seen " international defenst review ", APRIL, 1975, the 581st page), be considered to anti-preferably in the world impulsive noise earmuff, some national armies of Britain and NATO are equipped on artillery troops to it.This earmuff comprises the two-chamber cover body that inside and outside plastic casing is formed, head bow, ear pad plate and topping up ear pad.The ear pad plate is glued at the cover body edge, and the topping up ear pad is enclosed within on the ear pad plate.Because this earmuff has the dual chamber structure, a bow folder power is big, and the ear pad width is wide, so the acoustic attenuation value is more satisfactory, (228 * 114 * 158mm), weight reaches 625 grams but whole earmuff volume is big; Bow folder power is 13.94 newton, causes wearer's buccal stressed excessive; The ear pad width is 25mm, causes ear pad and people's auricle surrounding skin contact area big.These unfavorable factors make it be difficult to be used in continuous noise and the impulse noise environment that need wear continuously more than 4 hours.In addition, this earmuff head bow height can not be regulated, and does not satisfy the needs that people that head dummy varies in size wears; The head bow can not be around cover body 360 degree revolutions, so also do not satisfy different labor posture work post labourer's the needs of wearing.

It is higher that a purpose of the present utility model provides a kind of acoustic attenuation value, and comfortable wearing is used, anti-continuous noise and general impulsive noise earmuff easy to carry.Second purpose of the present utility model provides a kind of acoustic attenuation value height, wears more comfortablely, uses, antinoise earmuff easy to carry, and it is specially adapted to the protection of impulsive noise.

Earmuff of the present utility model is made up of with folding mechanism and rotary machine five parts cover body, topping up barrier type ear pad, head bow, head bow altitude mixture control.Cover body is the dual chamber structure, promptly constitutes two-chamber by two plastic casings that are connected as a single entity and topping up barrier type ear pad, specifically is outer chamber between shell and the inner shell, is inner chamber body between inner shell and the topping up barrier type ear pad, and inner shell then is the common wall of two cavitys.The edge-glued of shell is solidificated in the plate part at inner shell edge, and this part is the ear pad plate.Topping up barrier type ear pad is enclosed within on the ear pad plate.Described outer chamber, its chamber wall inner surface posts damping fin, is equipped with absorbent treatment in its chamber, and its outer wall has two poling holes, and two breathers penetrate in outer chamber through these two holes respectively.Have air-vent on the common wall.Two breathers, two air-vents and absorbent treatment constitute ventilative the mechanism that declines.Common wall is equipped with pit on inner chamber body one side surface.Topping up barrier type ear pad comprises inside and outside two snares that the isolation strip is divided into, be filled with liquid in these two snares, the isolation strip leave liquid to discharge orifice, liquid can be through flowing in inside and outside snare to discharge orifice, outer snare outer rim has bound edge, by this bound edge, whole topping up barrier type ear pad can be enclosed within on the ear pad plate.The head bow is made by the spring steel band that can provide 3.5～4.6 newton to press from both sides power.Head bow altitude mixture control and fold mechanism comprise a bow, height regulating frame and conduit.Crossbeam central authorities as the height regulating frame of head bow guide shaft are formed with outstanding ring, and head bow two ends volume is placed in this reality and goes out to encircle both sides.The transcatheter end of two armed levers of height regulating frame is placed in one; All there is plug the end of two armed levers, thereby can move freely in conduit, but can not deviate from; The other end of conduit cooperates with rotating disk gudgeon screw turns in the following slew gear.Slew gear comprises pressure cap, rotating disk, is positioned at the disk shaft of outer chamber outer surface and the rotating disk gudgeon of rotating disk both sides.Pressure cap, the pressured cap screw of rotating disk is connected with disk shaft.

This utility model earmuff has following advantage.

1. acoustic attenuation value height.

Pad value is 38dB(A under folder power 4 newton commonly used), and ACOSA9113 type earmuff is that the acoustic attenuation value is 40dB(A under 13.9 newton in head bow folder power).

2. comfortableness is good.

This earmuff full weight only is 250 grams, and folder power 4 newton commonly used wore 4～5 hours continuously, and user is unlikely thinks that the head burden is big.Topping up barrier type ear pad width is 15mm, and is filled with cool liquid, makes the wearer not only be convenient to perspire, and feels nice and cool.Ventilative the mechanism that declines communicates the inside and outside air of cover body, and the wearer can not feel that ear is vexed, dizzy and feel sick wait uncomfortable.The inner wall surface of inner chamber body has pit, and the reverberation sound of can decaying makes the wearer avoid the sense of discomfort of " drone sound " substantially.Damping fin obtains than high attenuation low-frequency noise, has avoided the wearer walking " rub-a-dub rub-a-dub the sound " that disorder of internal organs causes substantially.In addition, because the acoustical treatment of absorbent treatment and damping fin remarkable passing through of the resistance barrier language frequency sound, so communication closely still between the wearer.

3. easy to use.

Head bow altitude mixture control and fold mechanism make the head bow adjustable highly continuously, and the people that head dummy varies in size is easy to use; Whole earmuff volume after folding is 96 * 72 * 125(mm ³), be easy to carry, preserve.Slew gear makes the head bow can rotate by 360 degree relative to cover body, can adapt to different gestures labourer and wear needs.

Fig. 1 is this utility model anti-noise protective device for ears folded state sketch map.

Fig. 2 is the cover body side sectional view.

Fig. 3 is a topping up barrier type ear pad sketch map, and wherein Fig. 3 a is a front view, and Fig. 3 b is a side view.

Fig. 4 is head bow altitude mixture control and the fold mechanism view that part is analysed and observe, and wherein Fig. 4 a is a front view, and Fig. 4 b is a side view.

Fig. 5 is the slew gear cutaway view, and wherein Fig. 5 a is a sectional view, and Fig. 5 b is the part sectional front view.

Introduce first embodiment of this utility model below earlier.Earmuff according to present embodiment is made mainly is applicable to the protection of continuous noise, also can be used for the protection of general impulsive noise.

Referring to Fig. 1, in the present embodiment, earmuff comprises cover body 1, topping up barrier type ear pad 2, head bow 3, can see Fig. 4 for details by height regulating frame 4, conduit 5, head bow rotating shaft (crossbeam of height regulating frame 4) and outstanding ring 8() forms bend altitude mixture control and fold mechanism, and see Fig. 5 b by pressure cap 9, rotating disk 10, disk shaft 11 and rotating disk gudgeon 14() slew gear formed forms.

Now referring to Fig. 1 and Fig. 5, the annexation of five parts of this earmuff is described, cover body 1 pressured cap screw 13 is connected with the disk shafts 11 of the outer wall 20 surface central authorities that are formed on its outer chamber 12, like this cover body 1 with regard to and slew gear connect.Rotating disk 10 is connected with conduit 5 screws by the rotating disk gudgeon 14 of its left and right sides, thereby altitude mixture control and fold mechanism also connect with slew gear.The annulus that the spill mouth both sides of head bow 3 ends circumnutate is enclosed within (see figure 4) in the rotating shaft 7 of head bow, realize head bow 3 co-altitudes regulate with fold mechanism movingly.Topping up barrier type ear pad 2 is seen Fig. 3 by the bound edge 16(of its outer snare 15) be enclosed within ear pad plate 30(and see Fig. 2) on.

Fig. 2 is the cover body side sectional view of this utility model earmuff.Cover body 1 is the dual chamber structure; Outer wall 20 and common wall 17 constitute outer chamber 12, and common wall 17 and topping up barrier type ear pad 2 constitute inner chamber body 18.The joint portion of inner chamber body 18 and outer chamber 12 is an ear pad plate 30, and outer snare 15 width of its width and topping up barrier type ear pad 2 are basic identical (sees Fig. 3 a); Topping up barrier type ear pad 2 reliable its bound edges 16 are enclosed within on the ear muff backing plate 30, and bound edge two ends central authorities up and down respectively has an aperture (expressing among the figure), and an end of breather 22 is exposed.The inner surface of outer chamber 12 outer walls 20 and common wall 17 surface of outer chamber 12 1 sides outwardly post three damping fins 19.Damping fin 19 can be made by the big material of in-fighting (for example damping factor is 0.35).Damping fin 19 cooperates with topping up barrier type ear pad 2, can reduce the vibration and the low-frequency noise of cover body 1, has weakened the sensation of " rub-a-dub rub-a-dub ring " sound when the person that wears the earmuff is walked about.The outer wall 20 upper/lower terminal limit central authorities of outer chamber 12 respectively have 21, two breathers 22 in a logical poling hole and penetrate and paste between outer wall 20 inner surfacies and the absorbent treatment 23 the space placement of spiraling respectively through two poling holes 21.Breather 22 can be made by plastic tube, and length is 190～210mm, outward through 2.2mm, and internal diameter 1.5mm.Outer chamber 12 is built-in with the absorbent treatment 23 that sound-absorbing material is made, and its sound-absorbing material is a polyurethane foam plastics, industrial felt or glass fibre cotton, and their compressed thickness is 2～3mm.The acoustic absorptivity of sound-absorbing material is for kH ₂More preferably greater than 0.12,2kH ₂Greater than 0.21,4kH ₂Greater than 0.51,6.5kH ₂Greater than 0.69.

Common wall 17 both sides have two air-vents 24.Two breathers 22, absorbent treatment 23 and two air-vents 24 are formed the ventilative acoustic form that declines.This structure had both made cover body 1 inside and outside air communicate, and the middle and high audio-frequency noise that enters breather 22 is decayed, and the person can not feel discomforts such as ear is vexed, dizzy and feel sick so wear this earmuff.Common wall 17 is formed with thin orange peel pit 25 towards inner chamber body 18 1 side surfaces, and its reverberation sound of can decaying makes the wearer can't hear " drone ring " sound substantially.Be positioned at the disk shaft 11 of outer wall 20 outer surface central authorities, pressured cap screw 13 is connected with pressure cap 9, rotating disk 10, realizes being rotatably assorted, and makes the cover body 1 dish 10(that can rotate see Fig. 5) 360 degree rotate.

Fig. 3 signal provides topping up barrier type ear pad 2, and wherein Fig. 3 a is its front view, and Fig. 3 b is the side view that its part is analysed and observe.Topping up barrier type ear pad 2 by interior snare 27, outer collar 15, fill in they liquid 28 and isolation strip 26 wherein and form.Isolation strip 26 is solid, but leaves two to discharge orifice 29, they make liquid 28 can interior snare 27 and outside flow between the snare 15.Outer snare 15 outer rims have a circle bound edge 16, and topping up barrier type ear pad 2 can be enclosed within on the ear pad plate 30 of cover body 1 by bound edge 16.

The material of main part of topping up barrier type ear pad 2 is polrvinyl chloride, adds the plasticizer phthalic acid dioctyl ester in addition, and such material softness degree is suitable, and good hand touch has no stimulation to skin; Both can weaken the cover body vibration, comfortable wearing is further improved.Earlier this material is made the thick calendered film of 0.18mm, again that two-layer calendered film is compound, charge into fluid 28, going out to leave to discharge orifice 29 and width at central high frequency heat seal then is the isolation strip 26 of 4mm.The overall width of topping up barrier type ear pad 2 is 15mm, and liquid 28 can be that cool liquid also can be glycerol liquid.This structure of this ear pad 2 not only can reduce cover body vibration, and the path that makes ear pad 2 and people's auricle surrounding skin contact position form the slit is interrupted, thereby sound leakage reduces, this just guaranteed this earmuff under certain bow folder power the acoustic attenuation value than higher.Because topping up barrier type ear pad 2 overall widths only be 15mm, ear pad central authorities have the wide circle isolation strip 26 of a 4mm again, so the contact area of it and people's ear surrounding skin is smaller, help people's use of working in the high temperature noise circumstance.Fill the ear pad 2 behind the cool liquid, its actual temperature is lower than ambient temperature, and ambient temperature is high more, and its minus tolerance temperature is big more, and when therefore using this earmuff in the high temperature noise circumstance, it is salubrious pleasantly cool that the wearer feels.Fill the ear pad 2 that glycerol liquid is made, suit under room temperature or cryogenic conditions, to use, because liquid has good flowability, under the folder power of head bow 3, liquid 28 automatic stream recesses, this has just compensated people's face auricle rough individual variation of skeleton skin on every side automatically, thereby can not make sound leakage become big; For the user of wearing glasses, can not influence normally wearing of this earmuff because of the existence of glasses yet.

Now referring to Fig. 4, head bow altitude mixture control and fold mechanism are made up of head bow 3, height regulating frame 4, conduit 5, plug 6, head bow rotating shaft 7 and outstanding ring 8.Head bow 3 is by wide 25mm, and the spring steel band of thick 0.56mm is made, and for coordination attractive in appearance, head bow 3 is surrounded by plastic sheath.Height regulating frame 4 is made by steel wire, and its two armed lever penetrates wherein from conduit 5 one ends that plastics are made respectively, and the plug 6 of arm rest bar end cooperates with conduit 5, can freely stretch, but can not deviate from, and realizes that head bow 3 height are adjustable between 0～40mm.This range of accommodation can satisfy the needs of the user that head dummy varies in size.The motion of 4 liang of armed levers of height regulating frame is vertical basically, causes that head bow 3 folder power change scopes are 3.5～4.6 newton, and this can not make the acoustic attenuation value that big fluctuating is arranged.The crossbeam of height regulating frame 4 is as the rotating shaft 7 of head bow, and the end of head bow 3 has a spill mouth, and each volume of spill mouth both sides has a circle.These two circles are placed in the rotating shaft 7 of head bow, form head bow 3 and are rotatably assorted with height regulating frame 4.Head bends the central authorities of rotating shaft 7, promptly bends the indent of 3 ends corresponding to head, is configured as an outstanding ring 8.Outstanding ring 8 rhombus that is as the criterion, when this earmuff when folded state shown in Figure 1 launches, be stuck on the head bow 3, determine the profile of this earmuff user mode.The other end of conduit 5 is seen Fig. 5 b with the rotating disk gudgeon 14(on rotating disk 10 both sides by screw) screw turns cooperates, makes cover body 1 spend rotation by correct mutually bow 3 ± 180.This earmuff user mode maximum volume is 160 * 72 * 220(mm ³), two armed levers of height regulating frame 4 are pushed 5 li in conduit entirely, cover body 1 is rotated outside head bow 3, then, cover body 1 pushes in head bow 3 together with height regulating frame 4, and earmuff just becomes folded state shown in Figure 1.At this moment the volume of whole earmuff just is shrunk to 96 * 72 * 125(mm ³), the so little earmuff working clothing pocket of can packing into, easy to carry.

Referring to Fig. 5, slew gear is made of pressure cap 9, pressure cap screw 13, rotating disk 10, friction plate 31, disk shaft 11 and rotating disk gudgeon 14.There are two holes, concentric garden that diameter is different in rotating disk central authorities, and big hole is used for holding pressure cap 9, and small sircle hole is convenient to being connected of disk shaft 11 of rotating disk 10 and outer chamber 12 outer walls 20 central authorities of cover body 1.There is an aperture in pressure cap 9 central authorities, and pressure cap screw 13 cooperates with spiral shell nurse in the disk shaft 11 via above-mentioned three holes, thereby pressure cap 9, rotating disk 10 and cover body 1 are connected as a single entity, and the cover body 1 dish rotating shaft 11 that can rotate is made 360 degree and rotated.For rotating disk 10 rotate freely and prevent to relatively rotate with pressure cap 9 in hard friction cause breakage, be lined with friction plate 31 between the face being in contact with one another of rotating disk 10 and pressure cap 9.As mentioned above, the rotating disk gudgeon of rotating disk 10 both sides 14 and conduit 5 be screw movingly, thereby slew gear and altitude mixture control and folding mechanism are connected.Because cover body 1 relatively rotating disk 10 is made 360 degree and be rotated, again can correct mutually bow 3 ± 180 degree rotations, thus the person that uses this earmuff, can be according to the needs of own labour posture, the labour contractor bends 3 and places the crown, under the neck or behind the shin.In order to increase the security, on outstanding ring 8, is furnished with seat belt, in case wearer's earmuff in running falls on the ground.

Make the material of this earmuff, except screws such as head bow 3, height regulating frame 4 and pressure cap screw 13 are the metal material, other parts are all plastics, so this earmuff is low weight, full weight only is 250 grams.

Introduce second embodiment of the present utility model below.

In the present embodiment, the thickness of head bow 3 is 0.65mm, and width is 32mm, and its folder power excursion is 6～7.6 newton, and folder power commonly used is 7 newton, and other of earmuff yuan, parts and parameter thereof are identical with first embodiment's.According to the earmuff of this case making, its acoustic attenuation value can reach 42dB(A), be applicable to high-strength impulse noise environment, for example the high-strength impulse noise environment of large caliber gun shooting or bullet explosion time.

Claims (10)

1, a kind of anti-noise protective device for ears comprises, the cover body 1 that constitutes by inner chamber body 18 and outer chamber 12, head bow 3, ear pad plate 30 and topping up ear pad, it is characterized in that, also comprise head bow altitude mixture control and fold mechanism, slew gear, the common wall 17 of described inner chamber body 18 and outer chamber 12 has passage 24, and common wall 17 has pit towards the surface of inner chamber body 18 1 sides, described outer chamber 12, its chamber wall inner surface has damping fin 19, there are an absorbent treatment 23 and an end to pass the breather 22 of outer wall 20 in its chamber, described topping up ear pad is a topping up barrier type ear pad 2, it is by the interior snare 27 and the outer snare 15 that are filled with liquid 28, and the isolation strip between these two snares 26 is formed, isolation strip 26 have liquid 28 to discharge orifice 29, described head bow 3 is to provide 3.5～4.6 newton to press from both sides the spring steel band of power, described head bow altitude mixture control and fold mechanism, comprise head bow 3, height regulating frame 4 and conduit 5, the crossbeam of height regulating frame 4 is the rotating shaft 7 of head bow, the middle body of head bow rotating shaft 7 is configured as outstanding ring 8, head bow 3 two ends volume is placed in the rotating shaft 7 of head bow, two armed levers of height regulating frame 4 are inserted in the conduit 5, and all there is plug 6 end of two armed levers; Described slew gear is made up of pressure cap 9, rotating disk 10, the disk shaft 11 that is positioned at outer chamber 12 outer walls 20 outer surfaces and the rotating disk gudgeon 14 of rotating disk 10 both sides, pressure cap 9, rotating disk 10 pressured cap screws 13 are connected with disk shaft 11, and described head bow altitude mixture control is connected with rotating disk gudgeon 14 screws of slew gear by its conduit 5 with fold mechanism.

2, anti-noise protective device for ears according to claim 1 is characterized in that, the folder power of head bow 3 is between 6～7.6 newton.

3, anti-noise protective device for ears according to claim 1 and 2 is characterized in that, the material of topping up barrier type ear pad 2 is that polrvinyl chloride is mixed plasticizer O-phthalic two dioctyl phthalates.

4, anti-noise protective device for ears according to claim 3 is characterized in that, the pit on the common wall 17 is thin Fructus Citri tangerinae skin pit.

5, anti-noise protective device for ears according to claim 4 is characterized in that, damping fin 19 is made by the big damping material of in-fighting.

6, anti-noise protective device for ears according to claim 5 is characterized in that, the material of absorbent treatment 23 is glass fibre.

7, anti-noise protective device for ears according to claim 5 is characterized in that, the material of absorbent treatment 23 is polyurethane foam plastics.

8, anti-noise protective device for ears according to claim 5 is characterized in that, the material of absorbent treatment 23 is industrial felts.

9, anti-noise protective device for ears according to claim 6 is characterized in that, liquid 28 is cool liquid.

10, anti-noise protective device for ears according to claim 6 is characterized in that, liquid 28 is glycerol liquid.

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