CN2255163Y - Noise-reducing safety helmet - Google Patents
Noise-reducing safety helmet Download PDFInfo
- Publication number
- CN2255163Y CN2255163Y CN 96222784 CN96222784U CN2255163Y CN 2255163 Y CN2255163 Y CN 2255163Y CN 96222784 CN96222784 CN 96222784 CN 96222784 U CN96222784 U CN 96222784U CN 2255163 Y CN2255163 Y CN 2255163Y
- Authority
- CN
- China
- Prior art keywords
- noise
- safety helmet
- denoiser
- earflap
- reducing safety
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a noise-reducing safety helmet which can counteract noise waves in different frequency zones. The utility model is characterized in that both sides of a helmet body are respectively provided with a concave part with steel balls; moving earflaps are arranged on a connecting shaft, and the moving earflaps and the concave parts are symmetrical; each moving earflap is provided with a noise reducer which is formed by that a sensor is arranged on the off-axis paraboloidal face of the noise reducer, the off-axis paraboloidal face of the noise reducer is provided with a resonant cavity hole, the cavity bottom in the resonant cavity hole is provided with a resonant cavity membrane, a sandwiched air layer is fixed on the bottom of an outer cavity, a sandwiched air layer is arranged between two plate holes, and a wedge block is arranged on the plate hole of the outer layer. The utility model has the advantages of simple structure and convenient operation; the noise can be reduced by 35 decibels through the detection under the condition of the high sound source of from 110 to 108 decibels.
Description
The utility model relates to that a kind of it is applicable to the noise waves of different frequency band in the Noise-reducing safety helmet that miniature denoiser is arranged on the cap body, and Noise-reducing safety helmet can be widely used in industries such as electric power, traffic, coal, weaving, machinery, railway, powder process.
Noise not only can make people's deafness, but also can cause diseases such as hypertension, heart disease, neurosis, and influences people's normal life.Through the people of the noise source work of being everlasting, communication all can't carry out, and perplexs this problem in order to solve noise, and the method that many countries adopt is the sealing noise source, or seals a noise reduction sound room.What be used for the labour protection aspect generally is to adopt ear muffler, earplug and anti-sound head helmet.The sealing noise source is the method that at all solves noise hazard theoretically, still invests greatly and can not all solve.Ear muffler, earplug and anti-sound head helmet in use not only cause new injury to human body, and its scope of application is restricted.
The purpose of this utility model is a kind of Noise-reducing safety helmet of developing at above problem, on its movable earflap denoiser is housed, the carrier wave generating means connects the sensor of adorning on the denoiser, the carrier wave generating means produces high frequency carrier, carrier wave and with antinoise ripple stack, thereby increase the effect that the antinoise ripple is offset noise waves.The air bag presetting apparatus with the resonant cavity film, realizes producing the antiphase of different frequency noise waves by three groups of adjusting devices, and same frequency antinoise ripple is offset noise waves.
The utility model is achieved in that Noise-reducing safety helmet comprises on the cap body 12 plug 3 of dress and the two ear sides connecting axle 4 along last dress, the carrier wave generating means, the air bag presetting apparatus is contained on the circuit board 13 in the cap body 12, wherein, the recessed portion 2 that band positioning ball 1 is arranged on the both sides of cap body 12, movable earflap 5 be contained on the connecting axle 4 and and recessed portion 2 symmetrical, on the movable earflap 5 denoiser 6 is housed, the formation of denoiser 6 is, on the off-axis parabola of sensor 10 dress denoisers 6, resonance lumen pore 8 is arranged on the off-axis parabola, resonant cavity film 15 is being housed on 20 at the bottom of the chamber of resonance in the lumen pore 8, gas enclosure layer 21 is fixed at the bottom of the outer chamber of resonance lumen pore 8 on 20, be fixed with gas enclosure layer 18 on the plate hole 17, gas enclosure layer 18 links to each other with plate hole 19, and wedge piece 16 is contained on the plate hole 19.
The utility model can be achieved in that also the output of carrier wave generating means connects the input of sensor 10, three groups of gas circuits 24 of air bag presetting apparatus respectively with 20 be connected at the bottom of the chamber.
The utility model can also be achieved in that the material of wedge piece 16 adopts igelite to add gas permeable material and makes, and it can effectively reduce the decibels of diffraction to the interior small amount of noise ripple of denoiser 6.
Good effect of the present utility model is: Noise-reducing safety helmet is not only simple in structure, and is easy to use, and applied widely, and warp is measured under the strong sound source occasion of 110-108 decibel, but uses 35 decibels of this product noise reduction sound.
Description of drawings:
Fig. 1 is a shape and structure schematic diagram of the present utility model.
Fig. 2 is the A-A cutaway view of the utility model Fig. 3.
Fig. 3 is the schematic diagram of the movable earflap part of the utility model.
Fig. 4 is the schematic diagram that the antinoise ripple of the utility model denoiser is offset noise waves.
Fig. 5 is circuit, the gas circuit block diagram of the utility model denoiser.
Fig. 6 is the circuit theory diagrams of the utility model carrier generator.
Fig. 7 is the circuit theory diagrams of the utility model air bag presetting apparatus.
Fig. 8 is the circuit theory diagrams of the utility model air bag presetting apparatus.
Wherein: 1, positioning ball 2, recessed portion 3, plug 4, connecting axle
5, movable earflap 6, denoiser 7, draw-in groove 8, resonance lumen pore
9, earphone 10, sensor 11, soft-touch control 12, cap body
13, circuit board 14, control line 15, resonant cavity film 16, wedge piece
17, at the bottom of plate hole 18, gas enclosure layer 19, plate hole 20, the chamber
21, gas enclosure layer 22, back wave 23, noise waves 24, gas circuit
25, circuit
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1.The recessed portion 2 that a band positioning ball 1 is respectively arranged on the both sides of cap body 12, two movable earflaps 5 are contained on the cap body 12 by connecting axle 4, and and recessed portion 2 is symmetrical, movable earflap 5 can be rolled over by connecting axle 4 and be contained in the recessed portion 2, draw-in groove 7 on the movable earflap 5 can block steel ball 1 is fixed in the recessed portion 2 movable earflap 5, can also leave behind movable earflap 5 as required.As Fig. 1,2,3,4,5,6,7, shown in 8, on the movable earflap 5 denoiser 6 is housed, sensor 10 is contained on the off-axis parabola of denoiser 6, resonance lumen pore 8 is arranged on the off-axis parabola, resonant cavity film 15 is being housed on 20 at the bottom of the chamber of resonance in the lumen pore 8, after touching soft-touch control 11 (K) with hand, the carrier wave generating means and the air bag presetting apparatus of dress are started working on the circuit board 13, make denoiser 6 produce the antinoise ripple, thereby offset the purpose that extraneous noise waves is realized noise reduction sound, gas enclosure layer 21 is fixed at the bottom of the exocoel of resonance lumen pore 8 on 20, plate hole 17 is connected with gas enclosure layer 21, be fixed with gas enclosure layer 18 between plate hole 17 and plate hole 19, wedge piece 16 is contained on the plate hole 19, and this structure has played sound insulation, the effect of the multi-cavity resonant silencing and the band of eliminating the noise.The sound insulation of denoiser 6 partly is with 20 doing ground floor sound insulation at the bottom of the chamber, and plate hole 17 is second layer sound insulation, in the fixing gas enclosure layer 21 an amount of air is arranged on 20 at the bottom of the chamber, the sound intensity is decayed step by step realize the purpose that insulates against sound.The multi-cavity resonant silencing of denoiser 6 partly is to do ground floor with plate hole 19 to eliminate the noise, plate hole 17 is done the second layer and is eliminated the noise, plate hole 19 and plate hole 17 are arranged in dislocation, constituting gradient eliminates the noise, be filled with certain air in the gas enclosure layer 18 of dress between the plate hole 17 and 19, can in wider frequency, obtain bigger sound deadening capacity.The noise elimination band of denoiser 6 is to be mounted on adding the wedge piece 16 that gas permeable material makes with polyvinyl chloride and realize on the plate hole 19, thereby reduces the decibels of the small amount of noise ripple that diffraction enters.
Shown in Fig. 2,4,5,7.Noise waves 23 comprises condensation wave and rarefaction wave, when close, the rarefaction wave of noise waves 23 pass through resonance lumen pore 8, and compressing resonant cavity film 15, resonant cavity film 15 is oppressed round about, has produced rarefaction wave concerning the direction of back wave 22.In the time of before the rarefaction wave of noise waves 23 acts on resonant cavity film 15 by resonance lumen pore 8, concerning the direction of back wave 22, produced condensation wave.Because resonant cavity film 15 produces the reflection wave frequencies and determined by the noise wave frequency, thereby reflection wave frequency and noise wave frequency are consistent, thereby have produced the antinoise ripple of antiphase, same frequency, weaken the interior decibels of certain limit.Three groups of gas circuits 24 of air bag presetting apparatus respectively with 20 be connected at the bottom of the chamber, working procedure according to the air bag sequence circuit, finish the through and off of three groups of gas circuits 24 and atmosphere successively, make at the bottom of the chamber 20 interior gas be subjected in various degree adjusting, produce the antiphase of the noise waves of different frequency band with resonant cavity film 15, the antinoise ripple of same frequency has been offset noise waves, realizes the purpose of noise reduction sound.
Claims (4)
1, a kind of Noise-reducing safety helmet comprises on the cap body 12 plug 3 of dress and the two ear sides connecting axle 4 along last dress, and carrier wave generating means, air bag presetting apparatus are contained on the circuit board 13 in the cap body 12, it is characterized in that:
The recessed portion (2) that band positioning ball (1) is arranged on the both sides of a, cap body (12), movable earflap (5) be contained in that connecting axle (4) is gone up and and recessed portion (2) symmetrical, denoiser (6) is housed on the movable earflap (5),
The formation of b, denoiser (6) is, sensor (10) is contained on the off-axis parabola of denoiser (6), resonance lumen pore (8) is arranged on the off-axis parabola, on (20) resonant cavity film (15) is housed at the bottom of the chamber in resonance lumen pore (8), gas enclosure layer (21) is fixed at the bottom of the outer chamber of resonance lumen pore 8 on (20), be fixed with gas enclosure layer (18) on the plate hole (17), gas enclosure layer (18) links to each other with plate hole (19), and wedge piece (16) is contained on the plate hole (19).
2, Noise-reducing safety helmet according to claim 1 is characterized in that: the output of carrier wave generating means connects the input of sensor (10), and three groups of gas circuits (24) of air bag presetting apparatus are connected with (20) at the bottom of the chamber respectively.
3, Noise-reducing safety helmet according to claim 1 is characterized in that: the material of wedge piece (16) adopts igelite to add gas permeable material and makes.
4, Noise-reducing safety helmet according to claim 1 is characterized in that: draw-in groove (7) is arranged on the movable earflap (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96222784 CN2255163Y (en) | 1996-09-02 | 1996-09-02 | Noise-reducing safety helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96222784 CN2255163Y (en) | 1996-09-02 | 1996-09-02 | Noise-reducing safety helmet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2255163Y true CN2255163Y (en) | 1997-06-04 |
Family
ID=33902246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96222784 Expired - Fee Related CN2255163Y (en) | 1996-09-02 | 1996-09-02 | Noise-reducing safety helmet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2255163Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108778202A (en) * | 2016-03-29 | 2018-11-09 | 富士胶片株式会社 | Earmuff |
-
1996
- 1996-09-02 CN CN 96222784 patent/CN2255163Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108778202A (en) * | 2016-03-29 | 2018-11-09 | 富士胶片株式会社 | Earmuff |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |