Industrial noise reduction earmuff with working condition adaptive adjustment

Abstract

The application relates to the technical field of industrial earmuffs, and provides an industrial noise reduction earmuff with working condition self-adaptive adjustment, which comprises a supporting block arranged on a safety cap shell, an adjusting unit arranged on the outer surface of the supporting block and used for adjusting the sealing effect of the earmuff and the human body, an earmuff shell fixedly connected to the bottom of the adjusting unit, a decibel detector fixedly connected to the outer side of the earmuff shell, a detection ring connected to the decibel detector through an electric wire, sound-absorbing cotton placed in the interlayer of the earmuff shell, and an air inflation air bag fixedly connected to the inner side of the earmuff shell; a first adjusting unit and a second adjusting unit arranged on the inner wall of the earmuff shell; the sound-absorbing cotton can absorb part of the noise from the outside, and the detection ring can detect the size of the external noise so as to drive the adjusting unit, the first adjusting unit and the second adjusting unit to work, and the noise reduction effect is self-adjusted according to the actual working condition.

Description

Technical Field

[0001] This invention relates to the field of industrial earmuff technology, and in particular to an industrial noise-canceling earmuff with adaptive adjustment based on operating conditions. Background Technology

[0002] Industrial noise-canceling earmuffs are personal hearing protection equipment used in high-noise industrial environments. They use passive sound insulation materials or active noise reduction technology to block environmental noise and reduce noise damage to workers' hearing.

[0003] Noise characteristics vary significantly under different working conditions in industrial settings. For example, equipment start-up and shutdown, and process switching can cause drastic changes in noise sound pressure level and frequency distribution. Traditional industrial noise-canceling earmuffs often use fixed sound insulation structures or single-parameter active noise cancellation designs, which cannot dynamically adapt to changes in working conditions. This can easily lead to problems such as insufficient sound insulation in high-noise conditions, resulting in hearing risks, and excessive sound insulation in low-noise conditions, causing discomfort and communication barriers. Summary of the Invention

[0004] The purpose of this invention is to solve the problems that the noise characteristics of industrial sites vary significantly under different working conditions, and that traditional industrial noise-canceling earmuffs cannot dynamically adapt to changes in working conditions. These problems often result in insufficient sound insulation in high-noise conditions leading to hearing risks, and excessive sound insulation in low-noise conditions causing discomfort and communication barriers. The invention provides an industrial noise-canceling earmuff with adaptive adjustment based on working conditions.

[0005] The technical solution adopted by this invention to solve its technical problem is: an industrial noise-canceling earmuff with adaptive adjustment based on working conditions, comprising: a support block, the support block being disposed on a safety helmet shell, and further comprising:

[0006] An adjustment unit is set on the outer surface of the support block and used to adjust the fit and sealing effect of the earmuff with the human body. The bottom of the adjustment unit is fixedly connected to the earmuff shell. The outer side of the earmuff shell is fixedly connected to a decibel detector. The decibel detector is connected to a detection ring through a wire. Sound-absorbing cotton is placed in the interlayer of the earmuff shell. An inflatable airbag is fixedly connected to the inner side of the earmuff shell.

[0007] The first adjustment unit and the second adjustment unit are set on the inner wall of the earcup shell. The first adjustment unit changes the position of the sound insulation structure, thereby adjusting the sound insulation effect against noise from different directions. The second adjustment unit changes the thickness of the sound insulation structure, thereby adjusting the intensity of noise isolation, and adapting to noise environments of different intensities.

[0008] The adjustment unit includes a support frame, a controller is fixedly connected to the outer surface of the support frame, buttons are symmetrically arranged on the side of the controller away from the earcup shell, a first telescopic rod is fixedly connected to the side of the controller away from the buttons, a telescopic spring is fixedly connected to the bottom of the support frame, a circular plate is fixedly connected to one end of the telescopic spring, and a first support column is fixedly connected to the outer surface of the circular plate.

[0009] Furthermore, the top of the support frame is rotatably connected to the outer surface of the support block;

[0010] The output end of the first telescopic rod is fixedly connected to the outer surface of the earmuff shell, and the end of the first support column away from the circular plate is fixedly connected to the outer surface of the earmuff shell.

[0011] Furthermore, the first adjustment unit includes a servo motor, the output end of which is fixedly connected to a rotating shaft, the end of which is away from the servo motor is fixedly connected to a second support column, the inner wall of which is fixedly connected to a second telescopic rod, the output end of which is fixedly connected to a first support plate, the outer surface of which is fixedly connected to a cross block, and the outer surface of which is provided with a directional noise reduction mechanism.

[0012] Furthermore, the base of the servo motor is fixedly connected to the outer surface of the earcup shell, and the second support column and the directional noise reduction mechanism are located inside the earcup shell.

[0013] Furthermore, the directional noise reduction mechanism includes a sound insulation plate, the outer surface of which is provided with a placement groove, a guide post is fixedly connected to the outer surface of the placement groove, six sound insulation blocks slide on the outer surface of the guide post, an internal power supply is fixedly connected to the outer surface of the sound insulation block, a magnetic post is fixedly connected to the outer surface of the internal power supply, and a coil is sleeved on the outer surface of the magnetic post.

[0014] Furthermore, the tip of the sound insulation plate is fixedly connected to the outer surface of the second support column, and both ends of the coil are connected to the built-in power supply.

[0015] Furthermore, the second adjustment unit includes a partition earmuff, a communicator is fixedly connected to the inner side of the partition earmuff, a Bluetooth component is fixedly connected to the top of the communicator, a thickening groove is provided on the side of the partition earmuff facing the first adjustment unit, a rotating column is rotatably connected to the inner wall of the thickening groove, a cross groove is provided on the outer surface of the rotating column, six metal reflectors are fixedly connected to the outer surface of the rotating column, and a magnetic attraction layer is fixedly connected to the outer surface of the metal reflectors.

[0016] Furthermore, the outer surface of the diaphragm is fixedly connected to the inner wall of the earmuff shell.

[0017] Furthermore, the notch of the thickened groove, the shape of the metal reflector, and the sound insulation block are adapted to each other;

[0018] When the built-in power supply energizes the coil, the magnetic column generates magnetic force.

[0019] Furthermore, the shape of the cross groove is adapted to that of the cross block.

[0020] The beneficial effects of the industrial noise-canceling earmuff with adaptive adjustment based on working conditions provided by this invention are as follows:

[0021] (1) The adjustment unit controls the fit between the earmuff shell and the ear. The noise level is detected by the detection ring. When the noise level is ≥100dB, the controller automatically drives the first telescopic rod to extend a distance according to the preset threshold, so that the earmuff shell fits more tightly with the ear, improves the sealing performance, and prevents high noise from seeping in through the gap. At the same time, when the noise level is ≤85dB, the first telescopic rod will retract a distance to reduce the pressure on the ear and improve the comfort of wearing for a long time. The surface of the inflatable airbag is set with anti-slip texture to further enhance the sealing effect.

[0022] (2) As the direction of the noise source changes during the movement of personnel, the detection ring will detect the source of the main noise. The servo motor is connected to the rotating shaft and is used to drive the rotating shaft to rotate, thereby causing the second support column connected to the rotating shaft to rotate, thereby controlling the directional noise reduction mechanism to rotate to the propagation path of the main noise, and blocking it in a targeted manner, further enhancing the noise reduction effect.

[0023] (3) When the noise sound pressure level is particularly low, the metal reflector is offset from the notch of the thickened groove, reducing the coverage area of ​​the sound insulation material and avoiding discomfort and communication barriers caused by excessive sound insulation; when the noise sound pressure increases, the second telescopic rod will extend and the cross block will be inserted into the cross groove. Then the servo motor will drive the rotating column to rotate, so that the metal reflector coincides with the notch of the thickened groove, increasing the area of ​​the sound insulation material. At the same time, the built-in power supply on the outermost sound insulation block will energize the coil, so that the magnetic column will generate magnetic force. This magnetic force will attract the magnetic attraction layer, so that the sound insulation block enters the notch of the thickened groove along the guide column and fits with the metal reflector, increasing the thickness of the sound insulation material and improving the low-frequency sound insulation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a bottom view of the structure of the present invention;

[0026] Figure 3 This is a structural cross-sectional view of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the adjustment unit of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the first adjustment unit of the present invention;

[0029] Figure 6 This is a cross-sectional view of the structure of the first adjustment unit of the present invention;

[0030] Figure 7 This is a schematic diagram of the directional noise reduction mechanism of the present invention;

[0031] Figure 8 This is a schematic diagram of one side of the second adjustment unit of the present invention;

[0032] Figure 9 This is a schematic diagram of the other side of the structure of the second adjustment unit of the present invention;

[0033] Figure 10 This is a schematic diagram of the internal structure of the second adjustment unit of the present invention.

[0034] In the diagram: 1. Helmet shell; 2. Support block; 3. Adjustment unit; 4. Earmuff shell; 5. Decibel detector; 6. Detection ring; 7. First adjustment unit; 8. Second adjustment unit; 9. Sound-absorbing cotton; 10. Inflatable airbag; 31. Support frame; 32. Controller; 33. Button; 34. First telescopic rod; 35. Telescopic spring; 36. Circular plate; 37. First support column; 71. Servo motor; 72. Rotating shaft; 73. Second support column; 74. Second telescopic rod; 75. First support plate; 76. Cross block; 77. Directional noise reduction mechanism; 771. Sound insulation board; 772. Placement slot; 773. Guide column; 774. Sound insulation block; 775. Built-in power supply; 776. Magnetic column; 777. Coil; 81. Layered earmuff; 82. Communicator; 83. Bluetooth component; 84. Thickened slot; 85. Rotating column; 86. Cross slot; 87. Metal reflector; 88. Magnetic attraction layer. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the further embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] like Figures 1-3 As shown, an industrial noise-canceling earmuff with adaptive working condition adjustment includes: a support block 2, which is disposed on a safety helmet shell 1. For example, the support block 2 is fixed to the safety helmet shell 1 by screws or snap-fit. It also includes:

[0037] An adjustment unit 3 is set on the outer surface of the support block 2 and is used to adjust the sealing effect of the earmuffs against the human body. The bottom of the adjustment unit 3 is fixedly connected to the earmuff shell 4. The outer side of the earmuff shell 4 is fixedly connected to the decibel detector 5. The decibel detector 5 is connected to the detection ring 6 through a wire. Sound-absorbing cotton 9 is placed in the interlayer of the earmuff shell 4. An inflatable airbag 10 is fixedly connected to the inner side of the earmuff shell 4. The inflatable airbag 10 fits against the periauricular area.

[0038] The first adjustment unit 7 and the second adjustment unit 8 are set on the inner wall of the earcup shell 4. The first adjustment unit 7 changes the position of the sound insulation structure, thereby adjusting the sound insulation effect against noise from different directions. The second adjustment unit 8 changes the thickness of the sound insulation structure, thereby adjusting the intensity of noise isolation, and adapting to noise environments of different intensities.

[0039] When this invention is in operation, it is first necessary to wear the invention on the head and cover the ears with the earmuff shell 4. The sound-absorbing cotton 9 will absorb some of the noise from the outside. At the same time, the detection ring will detect the level of the external noise and drive the adjustment unit 3, the first adjustment unit 7 and the second adjustment unit 8 to start working, and adjust the noise reduction effect according to the actual working conditions.

[0040] like Figure 4 As shown, the adjustment unit 3 includes a support frame 31. A controller 32 is fixedly connected to the outer surface of the support frame 31. A button 33 is symmetrically arranged on the side of the controller 32 away from the earmuff shell 4. A first telescopic rod 34 is fixedly connected to the side of the controller 32 away from the button 33. A telescopic spring 35 is fixedly connected to the bottom of the support frame 31. A circular plate 36 is fixedly connected to one end of the telescopic spring 35. A first support column 37 is fixedly connected to the outer surface of the circular plate 36.

[0041] The top of the support frame 31 is rotatably connected to the outer surface of the support block 2;

[0042] The output end of the first telescopic rod 34 is fixedly connected to the outer surface of the earmuff shell 4, and the end of the first support column 37 away from the circular plate is fixedly connected to the outer surface of the earmuff shell 4.

[0043] The external noise level is detected by the detection ring 6. When the noise sound pressure level is ≥100dB, the controller 32 automatically drives the first telescopic rod 34 to extend a certain distance according to the preset threshold, so that the earcup shell 4 fits more tightly with the ear, improving the sealing performance and preventing high noise from seeping in through the gap. At the same time, when the noise sound pressure level is ≤85dB, the first telescopic rod 34 will retract a certain distance to reduce the pressure on the ear and improve the comfort of wearing for a long time. The surface of the inflatable airbag 10 is provided with anti-slip texture to further enhance the sealing effect.

[0044] like Figures 5-6As shown, the first adjustment unit 7 includes a servo motor 71, the output end of the servo motor 71 is fixedly connected to a rotating shaft 72, the end of the rotating shaft 72 away from the servo motor 71 is fixedly connected to a second support column 73, the inner wall of the second support column 73 is fixedly connected to a second telescopic rod 74, the output end of the second telescopic rod 74 is fixedly connected to a first support plate 75, the outer surface of the first support plate 75 is fixedly connected to a cross block 76, and the outer surface of the second support column 73 is provided with a directional noise reduction mechanism 77.

[0045] As personnel move during operations, the direction of the noise source will change. The detection ring 6 will detect the main source of the noise. At this time, the servo motor 71 will drive the rotating shaft 72 and the second support column 73 to rotate, thereby controlling the directional noise reduction mechanism 77 to rotate to the propagation path of the main noise and block it in a targeted manner, further enhancing the noise reduction effect.

[0046] The base of the servo motor 71 is fixedly connected to the outer surface of the earcup shell 4, and the second support column 73 and the directional noise reduction mechanism 77 are located inside the earcup shell 4.

[0047] like Figure 7 As shown, the directional noise reduction mechanism 77 includes a sound insulation plate 771. The outer surface of the sound insulation plate 771 is provided with a placement groove 772. A guide post 773 is fixedly connected to the outer surface of the placement groove 772. Six sound insulation blocks 774 slide on the outer surface of the guide post 773. An internal power supply 775 is fixedly connected to the outer surface of the sound insulation block 774. A magnetic post 776 is fixedly connected to the outer surface of the internal power supply 775. A coil 777 is sleeved on the outer surface of the magnetic post 776.

[0048] As the rotating column 85 rotates, it will move the sound insulation panel 771 to the path of the main noise propagation. Then, the sound insulation panel 771 will reflect and absorb the main noise.

[0049] The tip of the sound insulation plate 771 is fixedly connected to the outer surface of the second support column 73, and the two ends of the coil 777 are connected to the built-in power supply 775.

[0050] like Figures 8-10 As shown, the second adjustment unit 8 includes a partition earcup 81. A communicator 82 is fixedly connected to the inner side of the partition earcup 81. A Bluetooth component 83 is fixedly connected to the top of the communicator 82. A thickening groove 84 is provided on the side of the partition earcup 81 facing the first adjustment unit 7. A rotating column 85 is rotatably connected to the inner wall of the thickening groove 84. A cross groove 86 is provided on the outer surface of the rotating column 85. Six metal reflectors 87 are fixedly connected to the side surface of the rotating column 85. A magnetic attraction layer 88 is fixedly connected to the outer surface of the metal reflectors 87.

[0051] When there is a lot of noise from all directions, the first adjustment unit 7 will not be effective, and the second adjustment unit 8 will start to work.

[0052] The outer surface of the earmuff 81 is fixedly connected to the inner wall of the earmuff shell 4.

[0053] The notch of the thickened groove 84, the shape of the metal reflector 87, and the sound insulation block 774 are adapted to each other;

[0054] When the built-in power supply 775 energizes the coil 777, the magnetic post 776 will generate a magnetic force.

[0055] The shapes of the cross groove 86 and the cross block 76 are compatible.

[0056] Under normal circumstances, the metal reflector 87 is offset from the notch of the thickened groove 84, reducing the coverage area of ​​the sound insulation material. When the noise pressure increases, the second telescopic rod 74 extends and the cross block 76 is inserted into the cross groove 86. Then, the servo motor 71 drives the rotating column 85 to rotate, so that the metal reflector 87 coincides with the notch of the thickened groove 84, increasing the area of ​​the sound insulation material. At the same time, the built-in power supply 775 on the outermost sound insulation block 774 energizes the coil 777, so that the magnetic column 776 generates a magnetic force. This magnetic force attracts the magnetic attraction layer 88, so that the sound insulation block 774 enters the notch of the thickened groove 84 along the guide column 773 and fits against the metal reflector 87, increasing the thickness of the sound insulation material and improving the low-frequency sound insulation.

[0057] When no additional noise reduction effect is needed, the power supply will change the direction of the current passing through the coil 777, thereby causing the magnetic column 776 to generate magnetic force and repel the magnetic attraction layer 88, thereby causing the sound insulation block 774 to be reset into the placement slot 772 along the guide column 773.

[0058] The working process of an industrial noise-canceling earmuff with adaptive adjustment based on working conditions provided by this invention is as follows:

[0059] The adjustment unit 3 controls the fit between the earcup shell 4 and the ear. When the noise level is low, the first telescopic rod 34 retracts a certain distance to reduce pressure on the ear and improve comfort during extended wear. When the noise level is high, it extends a certain distance to ensure a tighter fit between the earcup shell 4 and the ear, improving sealing performance and preventing high noise from seeping in through gaps. Simultaneously, the first adjustment unit 7 specifically intercepts and absorbs major noise sources along their paths, further enhancing noise reduction. When there are multiple noise sources and high sound pressure, the first adjustment unit 7 works in conjunction with the second adjustment unit 8. The retractor 74 extends and the cross block 76 is inserted into the cross groove 86. Then, the servo motor 71 drives the rotating column 85 to rotate, so that the metal reflector 87 coincides with the notch of the thickening groove 84, increasing the area of ​​the sound insulation material. At the same time, the built-in power supply 775 on the outermost sound insulation block 774 will energize the coil 777, so that the magnetic column 776 generates a magnetic force. This magnetic force will attract the magnetic attraction layer 88, so that the sound insulation block 774 enters the notch of the thickening groove 84 along the guide column 773 and fits against the metal reflector 87, increasing the thickness of the sound insulation material and improving the low-frequency sound insulation.

[0060] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the term "fixed connection" should be interpreted broadly. For example, it can refer to a bolted connection, a welded connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An industrial noise-canceling earmuff with adaptive adjustment based on operating conditions, comprising: The support block, which is disposed on the helmet shell, is characterized in that it further includes: An adjustment unit is set on the outer surface of the support block and used to adjust the fit and sealing effect of the earmuff with the human body. The bottom of the adjustment unit is fixedly connected to the earmuff shell. The outer side of the earmuff shell is fixedly connected to a decibel detector. The decibel detector is connected to a detection ring through a wire. Sound-absorbing cotton is placed in the interlayer of the earmuff shell. An inflatable airbag is fixedly connected to the inner side of the earmuff shell. The first adjustment unit and the second adjustment unit are set on the inner wall of the earcup shell. The first adjustment unit changes the position of the sound insulation material, thereby adjusting the sound insulation effect against noise from different directions. The second adjustment unit changes the thickness of the sound insulation structure, thereby adjusting the intensity of noise isolation, and adapting to noise environments of different intensities. The adjustment unit includes a support frame, a controller is fixedly connected to the outer surface of the support frame, buttons are symmetrically arranged on the side of the controller away from the earcup shell, a first telescopic rod is fixedly connected to the side of the controller away from the buttons, a telescopic spring is fixedly connected to the bottom of the support frame, a circular plate is fixedly connected to one end of the telescopic spring, and a first support column is fixedly connected to the outer surface of the circular plate.

2. The industrial noise-canceling earmuff with adaptive adjustment based on operating conditions according to claim 1, characterized in that: The top of the support frame is rotatably connected to the outer surface of the support block; The output end of the first telescopic rod is fixedly connected to the outer surface of the earmuff shell, and the end of the first support column away from the circular plate is fixedly connected to the outer surface of the earmuff shell.

3. An industrial noise-canceling earmuff with adaptive adjustment based on operating conditions as described in claim 1, characterized in that: The first adjustment unit includes a servo motor, the output end of which is fixedly connected to a rotating shaft, the end of which is away from the servo motor is fixedly connected to a second support column, the inner wall of which is fixedly connected to a second telescopic rod, the output end of which is fixedly connected to a first support plate, the outer surface of which is fixedly connected to a cross block, and the outer surface of which is provided with a directional noise reduction mechanism.

4. An industrial noise-canceling earmuff with adaptive adjustment based on operating conditions according to claim 3, characterized in that: The base of the servo motor is fixedly connected to the outer surface of the earcup shell, and the second support column and the directional noise reduction mechanism are located inside the earcup shell.

5. An industrial noise-canceling earmuff with adaptive adjustment based on operating conditions according to claim 3, characterized in that: The directional noise reduction mechanism includes a sound insulation plate, a placement groove on the outer surface of the sound insulation plate, a guide post fixedly connected to the outer surface of the placement groove, six sound insulation blocks sliding on the outer surface of the guide post, a built-in power supply fixedly connected to the outer surface of the sound insulation block, a magnetic post fixedly connected to the outer surface of the built-in power supply, and a coil sleeved on the outer surface of the magnetic post.

6. An industrial noise-canceling earmuff with adaptive adjustment based on operating conditions according to claim 5, characterized in that: The tip of the sound insulation panel is fixedly connected to the outer surface of the second support column, and the two ends of the coil are connected to the built-in power supply.

7. An industrial noise-canceling earmuff with adaptive adjustment based on operating conditions according to claim 5, characterized in that: The second adjustment unit includes a partition earmuff. The partition earmuff has a thickening groove on the side facing the first adjustment unit. A rotating column is rotatably connected to the inner wall of the thickening groove. A cross groove is provided on the outer surface of the rotating column. Six metal reflectors are fixedly connected to the side surface of the rotating column. A magnetic attraction layer is fixedly connected to the outer surface of the metal reflectors.

8. An industrial noise-canceling earmuff with adaptive adjustment based on operating conditions according to claim 7, characterized in that: The outer surface of the diaphragm is fixedly connected to the inner wall of the earmuff shell.

9. An industrial noise-canceling earmuff with adaptive operating condition adjustment according to claim 7, characterized in that: The notch of the thickened groove, the shape of the metal reflector and the sound insulation block are adapted to each other; When the built-in power supply energizes the coil, the magnetic column generates magnetic force.

10. An industrial noise-canceling earmuff with adaptive operating condition adjustment as described in claim 7, characterized in that: The cross groove and the cross block are adapted to each other in shape.

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