Safety helmet earmuff and safety protection assembly

Abstract

The invention is suitable for the technical field of personal safety protection equipment, and provides a safety helmet earmuff and a safety protection assembly.The safety helmet earmuff comprises an earmuff cup body, a connecting arm connected with the earmuff cup body and a connecting base connected with the connecting arm and used for being connected with a safety helmet; an electronic warning module is accommodated in the earmuff cup body and comprises at least one light-emitting unit used as a light source; the outer wall of the earmuff cup body is provided with a light-transmitting area for transmitting light, the inner wall of the light-transmitting area is integrally provided with a plurality of micro lens units which are arranged in an array and are used for diffusing the light, and the light emitted by the light-emitting unit is diffused into planar warning light through the plurality of micro lens units. The safety helmet earmuff solves the problems that an existing safety helmet earmuff is single in function and low in protection integration degree.

Description

Technical Field

[0001] The present invention relates to the technical field of personal safety protection equipment, in particular to a safety helmet earmuff and a safety protection component. Background Art

[0002] Hard hats are essential personal protective equipment (PPE) in high-risk work environments, such as industrial production, construction, and mining. Their primary function is to protect the wearer's head from physical injuries such as falling objects and impacts. In many noisy work environments, such as coal mines, machine shops, and construction sites, hard hats are often equipped with or integrated with soundproofing earmuffs to attenuate ambient noise and protect the wearer's hearing.

[0003] Currently, common safety helmet earmuffs on the market have relatively simple designs and functions. Their core function is physical sound insulation. Through the cup, sound-absorbing foam, and sealing ring, they isolate the wearer's ears from external high-decibel noise sources, providing passive hearing protection. These earmuffs play a vital role in sound insulation and noise reduction, safeguarding the health of workers.

[0004] However, in actual work scenarios, in addition to hearing protection, wearers often need other safety features, especially visual warning functions. In places with dim light, complex environments, obstructed vision, or where people and large machinery are working together (such as in coal mining and excavation, tunnel construction, night road maintenance, warehousing and logistics, etc.), the wearer's visibility is directly related to their personal safety. To improve visibility, workers usually need to wear additional reflective vests or install independent warning lights, headlights, and other equipment on their helmets.

[0005] This existing technical solution of separating the hearing protection function from the visual warning function has the following obvious defects:

[0006] Single function and low integration: Existing helmet earmuffs only provide sound insulation, and the large outer shell space is not effectively utilized. The protective equipment has scattered functions and fails to form an integrated intelligent protection solution.

[0007] Wearing is cumbersome and increases the burden: workers need to wear or install multiple devices such as safety helmets, earmuffs, warning lights, etc. separately, which is inconvenient to operate, increases the overall weight and burden of the wearer, and may even affect the normal protective performance of the safety helmet or earmuffs themselves due to improper installation.

[0008] Inconvenient management and increased costs: Multiple separate devices require independent power supply, charging, and maintenance management, increasing procurement costs and complexity of subsequent maintenance. Furthermore, workers may put themselves in danger by forgetting to bring a warning device.

[0009] In summary, the safety helmet earmuffs in the existing technology have a single function and can only achieve passive sound insulation protection. They cannot meet the wearer's needs for active outline warnings in complex environments. They have problems such as low integration, inconvenience in use, and equipment redundancy. Summary of the Invention

[0010] Based on this, the purpose of the present invention is to provide a safety helmet earmuff and a safety protection assembly to fundamentally solve the problem that the existing safety helmet earmuffs have single functions and low protection integration.

[0011] A safety helmet earmuff according to an embodiment of the present invention comprises an earmuff cup body, a connecting arm connected to the earmuff cup body, and a connecting base connected to the connecting arm and used to connect to the safety helmet;

[0012] The earmuff cup contains an electronic warning module, which includes at least one light-emitting unit used as a light source;

[0013] A light-transmitting area for transmitting light is provided on the outer wall of the earmuff cup body, and a plurality of micro-lens units for diffusing light arranged in an array are integrally formed on the inner wall of the light-transmitting area. The light emitted by the light-emitting unit is diffused into a planar warning light through the plurality of micro-lens units.

[0014] In addition, the helmet earmuffs according to the above embodiment of the present invention may also have the following additional technical features:

[0015] Furthermore, the earmuff cup body includes an earmuff shell, the electronic warning module and the switch interface module disposed in a receiving cavity formed inside the earmuff shell, a sound absorbing component filling the space around the electronic warning module and the switch interface module, an ear pad fixing plate detachably mounted on the open end of the earmuff shell and used to press the sound absorbing component, and an ear pad detachably mounted on the ear pad fixing plate;

[0016] The electronic warning module includes a light-emitting unit, a main control circuit board carrying the light-emitting unit on one side, a power supply component provided on the other side of the main control circuit board and electrically connected to the main control circuit board, and an adhesive component provided between the main control circuit board and the power supply component;

[0017] The switch interface module includes an interface circuit board electrically connected to the main control circuit board, and a charging interface and a switch provided on the interface circuit board.

[0018] Further, the inner wall of the light-transmitting region is provided with an integrally formed light-transmitting cylinder corresponding to the central position of the light-emitting unit, the incident end face of the light-transmitting cylinder is formed as a concave curved surface for reflecting and / or focusing the light emitted by the light-emitting unit, and the micro-lens unit is in the shape of a hemisphere and arranged on the inner wall of the light-transmitting region in a hexagonal close-packed or rectangular array.

[0019] Further, the inner wall of the ear cover shell is integrally formed with a plurality of L-shaped support seats corresponding to the positions of the top corners of the main control circuit board, and the two side edge regions of the main control circuit board are formed with wing portions abutting against the inner side walls of the L-shaped support seats.

[0020] The inner wall of the ear cover shell is also integrally formed with a plurality of positioning ribs, the top surfaces of the plurality of positioning ribs jointly form a bearing plane matching the shape of the bottom of the interface circuit board, and the side walls of the plurality of positioning ribs jointly define the horizontal position of the interface circuit board.

[0021] Further, the ear cover cup further comprises a cover plate for covering and fixing the electronic warning module, the inner wall of the cover plate is integrally formed with first reinforcing ribs arranged alternately, each top corner edge of the cover plate is provided with a plug-in plate corresponding to the L-shaped support seat, the L-shaped support seat is formed with two parallel tracks extending along the depth direction thereof to form a double-track plug-in slot, and the end portion of the plug-in plate is formed with a tapered guide-in structure with gradually decreasing width.

[0022] Further, the sound-absorbing component is provided with a relief gap corresponding to the position of the switch interface module, the open end edge of the ear cover shell is provided with a positioning gap for preventing mistakes corresponding to the position of the charging interface, the ear pad fixing plate is provided with a positioning column corresponding to the positioning gap, the inner wall of the ear pad fixing plate is integrally formed with a fixing column for abutting and fixing the charging interface, the ear cover shell is provided with a first receiving hole and a second receiving hole corresponding to the positions of the charging interface and the switch respectively, and the second receiving hole is provided with a button for pressing the switch.

[0023] Further, the inner wall of the open end edge of the ear cover shell is provided with a plurality of evenly distributed fixing buckles, the inner wall of the ear pad fixing plate is provided with a clamping plate for abutting against the inner wall of the ear cover shell, the clamping plate is provided with an annular clamping groove for clamping and fixing the fixing buckles, and the inner wall of the ear pad fixing plate is integrally formed with second reinforcing ribs arranged alternately.

[0024] Furthermore, one end of the connecting arm connected to the connecting seat is bent into an elastic U-shaped pivot section, and the connecting seat includes a main base for being mounted on the safety helmet, a rotating hub with an accommodating cavity formed therein for accommodating the U-shaped pivot section and rotatably connected to a rotating shaft extending from the middle of the main base, a rotating pin accommodated in the rotating hub and rotatably connected to the U-shaped pivot section, a pressure cover plate that cooperates with the rotating hub to encapsulate the U-shaped pivot section, and a fastener that passes through the pressure cover plate and is connected to the rotating shaft of the main base.

[0025] Furthermore, the connecting arm includes a telescopic rod sleeve sleeved on the outer wall of the earmuff shell, and a connecting rod connected to the connecting seat, and the end of the connecting rod can be slidably inserted into the telescopic rod sleeve.

[0026] Another embodiment of the present invention aims to provide a safety protection assembly, comprising a safety helmet and the safety helmet earmuffs as described above that are detachably connected to the safety helmet.

[0027] The safety helmet earmuffs provided by the embodiments of the present invention have a plurality of micro lens units arranged in an array on the inner wall of the light-transmitting area of ​​the earmuff cup body, and cooperate with the light-transmitting column for primary divergence at the center position thereof to efficiently convert the single light source of the internal electronic warning module into a large-area, uniform and soft planar warning light, thereby greatly improving the wearer's visibility and recognizability in dim and harsh environments, and providing all-round, no-dead-angle active safety warnings; and an L-shaped support seat for abutting against the main control circuit board and a positioning rib for abutting against the interface circuit board are integrally formed on the inner wall of the earmuff shell, and cooperate with the plug-in board extending from the cover plate and the double-track slot in the L-shaped support seat to form a firm plug-in lock, which effectively suppresses displacement and loosening under impact and vibration conditions, greatly improving The reliability of the electronic system and the overall durability of the product are enhanced, while the structure simplifies the assembly process and improves production efficiency. The fixed buckle provided at the open end of the earmuff shell forms a reliable engagement with the annular slot on the earpad fixing plate. The foolproof positioning notch and positioning column ensure a single correct installation direction, allowing the user to clearly sense the engagement state when the earmuff is in place, thus avoiding a decrease in sealing due to improper installation. This greatly facilitates the user's daily cleaning and maintenance (such as replacing batteries or earpads) and extends the product's service life. By bending one end of the connecting arm connecting to the connecting base into an elastic U-shaped pivot section, which elastically presses a floating locking block within the rotating hub, and cooperating with the telescopic adjustment structure at the end of the connecting arm, a dual-adjustment and adaptive fit system is formed. This solves the problem of existing helmet earmuffs having a single function and low protection integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1Schematic diagram of the structure of the helmet earmuffs in the first embodiment of the present invention at a first viewing angle;

[0029] Figure 2 2 is a schematic structural diagram of the helmet earmuffs according to the first embodiment of the present invention at a second viewing angle;

[0030] Figure 3 An exploded view of the helmet earmuffs according to the first embodiment of the present invention from a third viewing angle;

[0031] Figure 4 An exploded view of the helmet earmuffs according to the first embodiment of the present invention at a fourth viewing angle;

[0032] Figure 5 An exploded view of the helmet earmuffs according to the first embodiment of the present invention at a fifth viewing angle;

[0033] Figure 6 An exploded view of the helmet earmuffs according to the first embodiment of the present invention, with the sound absorbing component, the ear pad fixing plate, and the ear pad removed, at a sixth viewing angle;

[0034] Figure 7 for Figure 3 Enlarged view of the middle circle Ⅰ part;

[0035] Figure 8 for Figure 3 Enlarged view of the middle circle II part;

[0036] Figure 9 for Figure 5 Enlarged view of the middle circle III;

[0037] Figure 10 for Figure 6 Enlarged view of the middle circle IV;

[0038] Figure 11 is a schematic structural diagram of the safety protection assembly in the second embodiment of the present invention at a seventh viewing angle;

[0039] Figure 12 An exploded view of the safety protection assembly in the second embodiment of the present invention at an eighth viewing angle;

[0040] Reference numerals

[0041] Earmuff cup body 10, connecting arm 20, connecting base 30, earmuff shell 11, electronic warning module 12, switch interface module 13, sound absorbing component 14, ear pad fixing plate 15, ear pad 16, cover plate 17, telescopic rod sleeve 21, connecting rod 22, main body base 31, rotating hub 32, rotating pin 33, pressure cover plate 34, fastener 35, light-transmitting area 111, micro lens unit 112, light-transmitting cylinder 113, L-shaped support base 114, positioning rib 115, positioning notch 116, first receiving hole 117, second receiving hole 118, button 119, fixing buckle 1110, light-emitting unit 121, main control circuit board 122, power supply component 123, adhesive component 124, interface circuit board 131, charging interface 132, switch 133, positioning column 151, fixing column 152, card plate 153, annular card groove 154, second reinforcing rib 155, first reinforcing rib 171, plug-in board 172, safety helmet 100, safety helmet earmuff 200.

[0042] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0043] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0044] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0046] Example 1

[0047] See also Figures 1-10As shown in the drawing, the ear cover of the safety helmet is shown in the first embodiment of the present application, for the convenience of illustration, only the part related to the embodiment of the present application is shown, the ear cover of the safety helmet provided by the embodiment of the present application comprises an ear cover cup body 10, a connecting arm 20 connected with the ear cover cup body 10, and a connecting seat 30 connected with the connecting arm 20 and used for connecting with the safety helmet;

[0048] The ear cover cup body 10 contains an electronic warning module 12, the electronic warning module 12 comprises at least one light emitting unit 121 used as a light source;

[0049] The outer wall of the ear cover cup body 10 is provided with a light transmission area 111 used for transmitting light, the inner wall of the light transmission area 111 is integrally formed with a plurality of micro lens units 112 arranged in an array and used for diffusing light, the light emitted by the light emitting unit 121 is diffused into a planar warning light via the plurality of micro lens units 112.

[0050] In one embodiment of the present application, the basic structure of the ear cover of the safety helmet comprises the ear cover cup body 10, the connecting arm 20 and the connecting seat 30. The connecting seat 30 is used for inserting and fixing the whole ear cover unit on the safety helmet; the connecting arm 20 connects the connecting seat 30 and the ear cover cup body 10 and provides a position adjusting function; and the ear cover cup body 10 is the main part for realizing the hearing protection and active warning function. In the inside of the ear cover cup body 10, an electronic warning module 12 is contained. The core of the electronic warning module 12 is one or more light emitting units 121, in the embodiment, the high-brightness LED (light emitting diode) is preferably used as the light source. The light source has low power consumption, concentrated light, long service life and small size, and is very suitable for being integrated in the limited space of the ear cover cup body 10. In order to effectively convert the light emitted by the light source into a large-area and eye-catching warning signal, a light transmission area 111 is specially provided on the outer wall of the ear cover cup body 10. The light transmission area 111 can be injection molded by using the materials such as PC (polycarbonate) or PMMA (acrylic) with good light transmission, and can be integrally formed with the ear cover shell 11, or installed on the ear cover shell 11 as an independent light transmission cover. In one embodiment of the present application, with reference to Figure 1As shown, the light-transmitting area 111 is cross-shaped. Of course, this is optional. In other embodiments of the present invention, the light-transmitting area 111 can also adopt various other eye-catching geometric shapes. The specific configuration depends on actual use needs and is not specifically limited here. Furthermore, the inner wall of the light-transmitting area 111 (the side facing the light-emitting unit 121) is integrally formed with a plurality of micro-lens units 112 arranged in an array. The function of these micro-lens units 112 is to diffuse light. When the concentrated light beam emitted by the light-emitting unit 121 hits these micro-lens units 112, each micro-lens unit 112 scatters the light in all directions. Because the micro-lens units 112 are arranged in an array, the overall effect is to evenly diffuse the light from the point light source, forming a bright and soft planar warning light. This not only greatly increases the effective viewing area of ​​the warning signal, improving the wearer's recognition in dim environments, but also avoids glare caused by the point light source to others, significantly improving safety. Therefore, in the embodiments of the present invention, the above-mentioned point-to-surface optical design greatly enhances the warning effect. Compared to traditional single, exposed LED lights, the planar warning light offers a larger viewing area, greater visibility from all angles, and less glare. This provides a more effective safety warning for the wearer in harsh working environments like darkness, rain, and fog, significantly reducing the risk of accidents. Furthermore, the integrated microlens unit 112 and light-transmitting area 111 simplify the structure, reduce production costs, and improve product reliability and durability.

[0051] In one embodiment of the present invention, to achieve a composite warning effect that addresses both near and far distances, the inner wall structure of the light-transmitting region 111 is precisely designed. Specifically, an integrally formed light-transmitting column 113 is provided on the inner wall of the light-transmitting region 111, corresponding to the center of the light-emitting unit 121. The incident end face of the light-transmitting column 113 is formed as an inwardly concave curved surface for reflecting and / or focusing light emitted by the light-emitting unit 121. The microlens units 112 are hemispherical protrusions and are arranged on the inner wall of the light-transmitting region 111 in a hexagonal close-packed or rectangular array. A light-transmitting column 113 is integrally formed on the inner wall of the light-transmitting region 111, directly opposite the center of the light-emitting unit 121. The top surface of the light-transmitting cylinder 113 is designed to be a concave surface (such as a spherical surface or a parabolic surface), so that most of the incident light is reflected back into the interior of the light-transmitting cylinder 113, which is used to reflect and / or focus the light to enhance the illumination intensity or directionality of the outgoing light and improve the long-distance warning effect. Specifically, the concave surface serves as a light receiving port, so that the light-emitting unit 121 can be set directly against the concave surface, and ensure that the light emitted by the light-emitting unit 121 can enter the interior of the entity of the light-transmitting cylinder 113 (usually a PC or PMMA material with high light transmittance) at an optimized angle. At the same time, when the light entering the light-transmitting cylinder 113 is directed toward the side wall of the light-transmitting cylinder 113, its incident angle is greater than the critical angle of the material, so these light rays will not penetrate the side wall, but will be totally reflected on the inner surface of the side wall. At this time, after one or more total reflections from the side walls, the light originally diverging in all directions is effectively collected and corrected (collimated), and finally emitted from the bottom light-emitting surface of the light-transmitting column 113, forming a beam of high-intensity central warning light with strong directionality and concentrated energy. Furthermore, when the light-emitting unit 121 is working, there will always be a portion of light that diverges at a very large angle and fails to enter the effective receiving port of the light-transmitting column 113. This portion of divergent light will directly illuminate the micro-lens units 112 around the light-transmitting column 113. At this time, these micro-lens units 112 (such as hemispherical protrusions) will perform efficient wide-angle diffusion on these overflowing light, forming a planar warning light with an area much larger than the original light-emitting point and soft and uniform illumination. Therefore, the micro lens units 112 around the light-transmitting column 113 are used to diffuse the small amount of divergent light that is not focused, achieving uniform illumination around the periphery. At the same time, the design of the micro lens units 112 can also shield the internal circuit boards and electronic components, preventing the problem of the internal structure being directly visible from the outside due to the use of high-transmittance PC or PMMA materials in the light-transmitting area 111. Furthermore, in an embodiment of the present invention, these micro lens units 112 are preferably hemispherical protrusions, which are efficiently covered on the inner wall of the light-transmitting area 111 in a hexagonal close-packed or rectangular array. The hexagonal close-packed method can achieve the highest arrangement density, ensuring maximum light utilization and the most uniform diffusion effect.Therefore, in the embodiment of the present invention, the concave curved surface design of the light-transmitting cylinder 113 greatly improves the central light intensity and effective warning distance, allowing the wearer to be clearly observed even at long distances or in low-visibility environments such as fog, rain, and snow, significantly enhancing the safety of long-distance warnings. Furthermore, the micro-lens units 112 disposed around the light-transmitting cylinder 113 efficiently diffuse the divergent light that fails to enter the effective receiving port of the light-transmitting cylinder 113 at a wide angle, forming a uniform, soft, wide-angle floodlight. This allows the entire helmet earmuff to possess a focusing core for long-distance warnings while also providing a floodlight halo for close-range, wide-angle profiling. This perfectly balances long-distance penetration with close-range visibility, and makes the visual effect of the luminous surface of the entire light-transmitting area 111 more full and less glaring.

[0052] In an embodiment of the present application, in order to achieve the integration of functions, the facilitation of production and the reliability of use, the internal structure of the ear cover cup body 10 is carefully designed. Specifically, the ear cover cup body 10 includes an ear cover shell 11, an electronic warning module 12 and a switch interface module 13 arranged in the accommodating cavity formed in the inside of the ear cover shell 11, a sound-absorbing component 14 filled in the space around the electronic warning module 12 and the switch interface module 13, an ear pad fixing plate 15 detachably mounted on the open end of the ear cover shell 11 and used to compress the sound-absorbing component 14, and an ear pad 16 detachably mounted on the ear pad fixing plate 15; the electronic warning module 12 includes a light-emitting unit 121, a main control circuit board 122 bearing the light-emitting unit 121 on one side, a power supply component 123 arranged on the other side of the main control circuit board 122 and electrically connected with the main control circuit board 122, and an adhesive component 124 arranged between the main control circuit board 122 and the power supply component 123; the switch interface module 13 includes an interface circuit board 131 electrically connected with the main control circuit board 122, and a charging interface 132 and a switch 133 arranged on the interface circuit board 131. The ear cover shell 11 serves as the outermost supporting structure, and an accommodating cavity is formed in the inside of the ear cover shell 11. The electronic warning module 12 and the switch interface module 13 are arranged in the accommodating cavity. The sound-absorbing component 14, usually a sound-absorbing sponge, is filled in the remaining space around the electronic warning module 12 and the switch interface module 13. The ear pad fixing plate 15 is detachably mounted on the open end of the ear cover shell 11, and its main function is to compress and fix the sound-absorbing component 14. The ear pad 16, usually a soft leather material wrapped with a slow-rebound sponge, is detachably mounted on the ear pad fixing plate 15 and directly contacts the wearer's head. Further, the main control circuit board 122 (PCB) bears core components such as a microprocessor (MCU) and a driving circuit, and bears the light-emitting unit 121 on one side (towards the light-transmitting area 111). The power supply component 123 can be a rechargeable lithium battery, arranged on the other side of the main control circuit board 122 and electrically connected with the main control circuit board 122 through wires or contacts. The adhesive component 124, usually a double-sided tape, is arranged between the main control circuit board 122 and the power supply component 123, and is used to firmly paste the power supply component 123 on the main control circuit board 122. Further, the interface circuit board 131 is electrically connected with the main control circuit board 122 through a wire harness or a connector. The charging interface 132 (such as a Type-C interface) and the switch 133 (such as a tactile switch) are welded or mounted on the interface circuit board 131. Therefore, in the embodiment of the present application, the electronic function, the acoustic function, the structural function and the wearing comfort function are borne by different components respectively, and the design and optimization are more independent. Meanwhile, the modularized electronic components can be pre-produced and tested, and then assembled, which improves the production efficiency and the product qualification rate.Components prone to wear or replacement, such as the ear pads 16 and power supply 123, can be easily removed, reducing maintenance costs. Furthermore, the sound-absorbing component 14 not only performs its core noise reduction function but also provides padding, cushioning, and securing internal electronic components. The adhesive component 124 effectively prevents the battery from loosening due to vibration or impact, ensuring circuit stability and providing shock absorption.

[0053] Among them, in one embodiment of the present invention, in order to ensure that the internal modular components are installed firmly and reliably, the internal structure of the earmuff shell 11 is carefully designed in this embodiment of the present invention. Specifically, a plurality of L-shaped support seats 114 for supporting the main control circuit board 122 are integrally formed on the inner wall of the earmuff shell 11 corresponding to each vertex position of the main control circuit board 122, and the edge areas on both sides of the main control circuit board 122 are formed with wings that abut against the inner side walls of the L-shaped support seats 114; a plurality of positioning ribs 115 are also integrally formed on the inner wall of the earmuff shell 11, and the top surfaces of the plurality of positioning ribs 115 jointly form a supporting plane that is adapted to the bottom shape of the interface circuit board 131, and the side walls of the plurality of positioning ribs 115 jointly define the horizontal position of the interface circuit board 131. Specifically, a plurality of L-shaped support brackets 114 are integrally formed on the inner wall of the earmuff shell 11, corresponding to the respective top corners of the main control circuit board 122. The main circuit board 122 is placed on the horizontal surface of these L-shaped support brackets 114. Furthermore, in a preferred embodiment of the present invention, when the main circuit board 122 is placed on the horizontal surface of the L-shaped support brackets 114, a predetermined distance exists between its light-emitting unit 121 and the concave surface of the light-transmitting cylinder 113. This allows the light emitted by the light-emitting unit 121 to be focused by the concave surface of the light-transmitting cylinder 113, while the divergent light not focused by the concave surface is diffused by the microlens unit 112, achieving uniform illumination across the entire light-transmitting area 111. Furthermore, the main circuit board 122 is specially designed with outwardly extending wings on both side edges. These wings abut against the inner sidewalls (vertical surfaces) of the L-shaped support brackets 114, thereby precisely defining the position of the main circuit board 122 in the horizontal plane and preventing it from shaking or rotating. As for the interface circuit board 131, a plurality of positioning ribs 115 are also integrally formed on the inner wall of the earmuff shell 11. The top surfaces of these positioning ribs 115 together form a bearing plane that matches the shape of the bottom of the interface circuit board 131, while their side walls together form a frame that limits the horizontal position of the interface circuit board 131. Therefore, in the embodiment of the present invention, the design of fixing the main control circuit board 122 and the interface circuit board 131 by using the support base and positioning ribs 115 integrally formed in the shell completely abandons the traditional screw fixing method, thereby greatly simplifying the assembly process and improving production efficiency; reducing material costs; and utilizing the elasticity of the plastic itself to provide excellent vibration and impact resistance, so that the modular components remain stable and reliable in harsh use environments; at the same time, it ensures the consistency of the installation position of the PCB boards (i.e., the interface circuit board 131 and the main control circuit board 122) in all products.

[0054] In one embodiment of the present invention, in order to further reinforce the electronic warning module 12, the earmuff cup 10 is carefully designed. Specifically, the earmuff cup 10 also includes a cover 17 for covering and fixing the electronic warning module 12. The inner wall of the cover 17 is integrally formed with first reinforcing ribs 171 arranged in an interlaced manner. Each top corner edge of the cover 17 extends with a plug-in board 172 corresponding to the L-shaped support seat 114. The L-shaped support seat 114 is formed with two parallel tracks extending along its depth direction to form a dual-track slot. The end of the plug-in board 172 is formed with a tapered guide structure with a gradually decreasing width. Specifically, the cover 17 covers the electronic warning module 12, and its inner wall (the side facing the PCB) is integrally formed with first reinforcing ribs 171 (such as a grid or a tic-tac-toe pattern) that are interlaced to enhance the structural strength of the cover 17 itself. Each corner edge of the cover plate 17 extends with a plug-in plate 172, which corresponds one-to-one with the above-mentioned L-shaped support seat 114. At this time, by only providing the plug-in plates 172 at the four corners of the cover plate 17, rather than making a full circle of plug-in lips, the amount of plastic used can be significantly reduced. At the same time, the four-corner separated card point design allows workers to easily press the cover plate 17 down by simply roughly aligning the four card points, and the four card points will each find their own position, which is very fast. At the same time, the injection molded part will have slight deformation and dimensional deviation after cooling. The four-corner separated card point design has a much higher tolerance for such deformation. Even if the housing or cover plate 17 has slight warping, the four independent card points can still complete the assembly smoothly, greatly improving the product yield. Furthermore, each L-shaped support seat 114 has two parallel tracks along its depth direction (i.e., the plug-in direction), forming a dual-track slot, into which the plug-in plate 172 can slide accurately. To facilitate insertion, the end of the plug-in board 172 is also designed as a tapered guide structure with a gradually decreasing width. The design of the tapered guide structure is equivalent to creating a funnel or wedge at the head of the plug-in board 172. The assembler only needs to roughly align the tip of the taper with the entrance of the dual-track slot. When pressing down, the tapered slope will automatically and forcibly guide and calibrate the plug-in board 172 to a position that is completely aligned with the dual-track slot, and then smoothly insert it. This makes the assembly process foolproof and fast, requiring no thought. At the same time, the design of the tapered guide structure ensures that the contact between the plug-in board 172 and the slot starts from a point and then gradually transitions to surface contact. This makes the initial insertion force very small, the entire process feels smooth, and avoids damage to parts or assembly difficulties that may be caused by hard collisions. Therefore, in this embodiment of the present invention, the plug-in fit of the cover plate 17 and the L-shaped support seat 114 forms a very solid sandwich structure that tightly clamps and fixes the main control circuit board 122 in the middle.This design not only provides strong fixing force to prevent the main control circuit board 122 from shaking in any direction, but also makes the assembly process extremely smooth and accurate, realizing quick locking. The first reinforcing rib 171 ensures that the cover plate 17 does not deform itself while providing compression force.

[0055] In an embodiment of the present application, to ensure the convenience of user operation and the accuracy of assembly, the sound-absorbing component 14 is provided with a clearance gap 141 corresponding to the position of the switch interface module 13, the edge of the open end of the earmuff shell 11 is provided with a positioning gap 116 for preventing mistakes corresponding to the position of the charging interface 132, the earmuff pad fixing plate 15 is provided with a positioning column 151 corresponding to the positioning gap 116, and the inner wall of the earmuff pad fixing plate 15 is integrally formed with a fixing column 152 for abutting and fixing the charging interface 132. The earmuff shell 11 is provided with a first receiving hole 117 and a second receiving hole 118 corresponding to the positions of the charging interface 132 and the switch 133, respectively, and the second receiving hole 118 contains a button 119 for pressing the switch 133. Specifically, the sound-absorbing component 14 is provided with a clearance gap 141 corresponding to the position of the switch interface module 13, ensuring that the installation space of the switch interface module 13 is not interfered. The edge of the open end of the earmuff shell 11 is provided with a unique positioning gap 116 (anti-mistake design) corresponding to the position of the charging interface 132. Correspondingly, the earmuff pad fixing plate 15 is provided with a positioning column 151 that uniquely matches the positioning gap 116, ensuring that the earmuff pad fixing plate 15 can only be installed in one correct direction. The inner wall of the earmuff pad fixing plate 15 is integrally formed with a fixing column 152 for abutting and fixing the charging interface 132 after assembly, thereby fixing the switch interface module 13. The earmuff shell 11 is provided with a first receiving hole 117 and a second receiving hole 118 for the charging interface 132 and the switch 133, respectively. The second receiving hole 118 also contains a button 119, and the user drives the internal switch 133 by pressing the external button 119. Therefore, in the embodiment of the present application, the anti-mistake design (the cooperation of the positioning gap 116 and the positioning column 151) fundamentally eliminates the possibility of incorrect direction of the earmuff pad fixing plate 15. At the same time, the double fixation (interface circuit board welding and physical abutment of the fixing column 152) of the charging interface 132 greatly enhances its durability. The design of the external button 119 provides good waterproof and dustproof performance and a comfortable pressing feeling, and the wearer can control the light emission of the light-emitting unit 121 by operating the external button 119, thereby realizing the opening, closing, or switching of different modes (such as constant light, flashing, etc.) of the light-emitting unit 121.

[0056] In one embodiment of the present invention, to enable quick assembly and disassembly of the ear pad 16, the earmuff shell 11 and earpad fixing plate 15 are meticulously designed. Specifically, multiple evenly distributed fixing clips 1110 are provided on the inner wall of the earmuff shell 11's open edge. The earmuff fixing plate 15 has a retaining plate 153 on its upper inner wall for engaging with the inner wall of the earmuff shell 11. Within the retaining plate 153 are an annular retaining groove 154 for engaging and securing the retaining clips 1110. Secondary reinforcing ribs 155 are integrally formed on the inner wall of the earmuff fixing plate 15. Specifically, multiple fixing clips 1110 are evenly distributed along the inner wall of the earmuff shell 11's open edge. A circle of retaining plates 153 are provided on the inner wall of the earmuff fixing plate 15 for tightly engaging with the inner wall of the earmuff shell 11. An annular retaining groove 154 is formed on the outer side of the retaining plate 153 for engaging with the retaining clips 1110. During assembly, simply align the earpad mounting plate 15 (guided by the anti-fouling structure) and press firmly. The buckle will slide into the slot with a crisp click, indicating it is securely locked. Furthermore, the inner wall of the earpad mounting plate 15 is integrally formed with interlaced second reinforcing ribs 155 to enhance its rigidity, ensuring it will not deform during connection and use. They also evenly compress the sound-absorbing component 14 within, preventing it from shifting. The second reinforcing ribs 155 also form an acoustically transparent grille structure, allowing sound to pass through the mounting plate unimpeded to the sound-absorbing component 14 within, maximizing sound insulation. The earpad 16 is a soft, annular structure. Its outer periphery is secured to the edge of the earpad mounting plate 15 by means of a sleeve, clip, or adhesive. When worn, its inner side tightly fits against the side of the wearer's head, forming a soundproof seal and providing comfortable wearing. In this embodiment of the present invention, the back of the earpad 16 is provided with a flexible mounting skirt that fits over the outer periphery of the earpad mounting plate 15. Therefore, in the embodiment of the present invention, the above-mentioned snap-on connection method is used to achieve tool-free quick disassembly and assembly of the ear pad fixing plate 15, which greatly facilitates users to perform operations such as cleaning, replacing the ear pad 16, or repairing the internal battery, thereby improving the product's usability and life cycle.

[0057] In one embodiment of the present application, in order to allow the ear cover of the safety helmet to be adjusted flexibly and to fit the wearer's ear stably, the connecting seat 30 is also designed carefully. Specifically, the end of the connecting arm 20 connected to the connecting seat 30 is bent into a resilient U-shaped pivot section, the connecting seat 30 includes a main base 31 for mounting on the safety helmet, a rotating hub 32 internally formed with a receiving cavity for accommodating the U-shaped pivot section and rotationally connected to the rotating shaft protruding from the middle of the main base 31, a rotating pin 33 accommodated in the rotating hub 32 and rotationally connected to the U-shaped pivot section, a pressure cover plate 34 matched with the rotating hub 32 to encapsulate the U-shaped pivot section, and a fastener 35 passing through the pressure cover plate 34 and connected to the rotating shaft of the main base 31. Specifically, the end of the connecting arm 20 (usually made of metal wire or high-strength engineering plastic) connected to the connecting seat 30 is bent into a resilient U-shaped pivot section. The main base 31 is provided with a standard plug for insertion into the slot on the side of the safety helmet. The rotating hub 32 is rotationally connected to the main base 31 by a rotating shaft protruding from the middle of the main base 31. The rotating hub 32 is internally formed with a receiving cavity for accommodating the U-shaped pivot section of the connecting arm 20. The rotating pin 33 passes through the U-shaped pivot section and is accommodated in the rotating hub 32, so that the U-shaped pivot section can rotate around the rotating pin 33. The pressure cover plate 34 is matched with the rotating hub 32 to encapsulate the U-shaped pivot section and the rotating pin 33 in the receiving cavity. The fastener 35 (such as a screw) passes through the center of the pressure cover plate 34 and is screwed into the rotating shaft of the main base 31 to fasten the entire rotating hub 32 assembly together. Therefore, in the embodiment of the present application, the rotating hub 32 rotates around the rotating shaft of the main base 31, allowing the wearer to switch the safety helmet ear cover between the working position (covering the ears) and the standby position (folding forward or backward parallel to the wearer). The rotation of the U-shaped pivot section around the rotating pin 33 allows the safety helmet ear cover to be adjusted in angle, allowing the wearer to switch the safety helmet ear cover between the working position (close to the wearer and covering the ears) and the disengagement position (folding outward away from the wearer), and when the safety helmet ear cover is set in the working position, it also allows the safety helmet ear cover to be adjusted in angle slightly to perfectly fit the head shape of different wearers. The resilience of the U-shaped pivot section itself provides stable and comfortable wearing pressure. The entire structure is solid and durable and can withstand frequent adjustment operations.

[0058] In one embodiment of the present invention, to accommodate different head sizes and the distance between the helmet and the ear, the connecting arm 20 is carefully designed. Specifically, the connecting arm 20 includes a telescopic rod sleeve 21 that is sleeved on the outer wall of the earmuff shell 11, and a connecting rod 22 that is connected to the connecting seat 30. The end of the connecting rod 22 is slidably inserted into the telescopic rod sleeve 21. The telescopic rod sleeve 21 can rotate around the earmuff shell 11, while the connecting rod 22 can slide and retract along the telescopic rod sleeve 21. Therefore, in this embodiment of the present invention, this telescopic design allows the vertical position of the helmet earmuff to be adjusted over a wide range, ensuring that the center of the earmuff cup 10 can be accurately aligned with the ear canal, regardless of whether the wearer has a large or small head, thereby achieving optimal noise reduction and wearing comfort.

[0059] Therefore, the embodiments of the present invention integrate an electronic warning module within the earmuff cup and design a unique two-stage optical diffusion system to transform point light sources into a large-area planar warning light, significantly improving active safety performance. Furthermore, the highly modularized, integrated, and screwless design of the earmuff cup's internal components achieves high reliability, high production efficiency, and easy maintenance. Its multi-dimensionally adjustable connection mechanism ensures universal fit and wearing comfort.

[0060] In summary, the helmet earmuffs in the above embodiments of the present invention efficiently convert the single light source of the internal electronic warning module into a large-area, uniform and soft planar warning light by integrally forming a plurality of micro-lens units arranged in an array on the inner wall of the light-transmitting area of ​​the earmuff cup body, and cooperating with the light-transmitting column for primary divergence at the center position thereof, thereby greatly improving the wearer's visibility and recognizability in dim and harsh environments, and providing all-round, no-dead-angle active safety warnings; and by integrally forming an L-shaped support seat for abutting the main control circuit board and a positioning rib for abutting the interface circuit board on the inner wall of the earmuff shell, and cooperating with the plug-in board extending from the cover plate and the double-track slot in the L-shaped support seat, a firm plug-in lock is formed, which effectively suppresses displacement and loosening under impact and vibration conditions, greatly improving the safety of the wearer. The reliability of the electronic system and the overall durability of the product are improved. At the same time, this structure simplifies the assembly process and improves production efficiency. The fixed buckle set at the open end of the earmuff shell forms a reliable engagement with the annular groove on the ear pad fixing plate. At the same time, the anti-mistake positioning notch and positioning column ensure the only correct installation direction. The user can clearly feel the engagement state when the installation is in place, avoiding the loss of sealing caused by improper installation. It greatly facilitates the user's daily cleaning and maintenance (such as replacing batteries or ear pads) and extends the service life of the product. By bending one end of the connecting arm connecting to the connecting base into an elastic U-shaped pivot section, which is elastically pressed against a floating locking block in the rotating hub, and cooperating with the telescopic adjustment structure at the end of the connecting arm, a dual adjustment and adaptive fitting system is formed. This solves the problem of the existing safety helmet earmuffs with single functions and low protection integration.

[0061] Example 2

[0062] See also Figure 11-12 , shows a safety protection assembly in a second embodiment of the present invention. For ease of description, only the portions relevant to the embodiment of the present invention are shown. The safety protection assembly provided by the embodiment of the present invention includes a safety helmet 100 and safety helmet earmuffs 200 detachably connected to the safety helmet 100, as described in the previous embodiment. The specific details of the safety helmet earmuffs 200 in this safety protection assembly can be referred to the description of the previous embodiment. The implementation principles and technical effects produced are the same as those of the previous embodiment. For the sake of simplicity, any parts not mentioned in this embodiment can be referred to the corresponding contents of the previous embodiment.

[0063] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] The above-described embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the scope of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A helmet earmuff, characterized in that: It includes an earmuff cup body, a connecting arm connected to the earmuff cup body, and a connecting base connected to the connecting arm and used to connect to a safety helmet; The earmuff cup contains an electronic warning module, which includes at least one light-emitting unit used as a light source; A light-transmitting area for transmitting light is provided on the outer wall of the earmuff cup body, and a plurality of micro-lens units for diffusing light arranged in an array are integrally formed on the inner wall of the light-transmitting area. The light emitted by the light-emitting unit is diffused into a planar warning light through the plurality of micro-lens units.

2. The safety helmet earmuff according to claim 1, characterized in that: The earmuff cup body includes an earmuff shell, the electronic warning module and the switch interface module disposed in a receiving cavity formed inside the earmuff shell, a sound absorbing component filling the space around the electronic warning module and the switch interface module, an ear pad fixing plate detachably mounted on the open end of the earmuff shell and used to press the sound absorbing component, and an ear pad detachably mounted on the ear pad fixing plate; The electronic warning module includes a light-emitting unit, a main control circuit board carrying the light-emitting unit on one side, a power supply component provided on the other side of the main control circuit board and electrically connected to the main control circuit board, and an adhesive component provided between the main control circuit board and the power supply component; The switch interface module includes an interface circuit board electrically connected to the main control circuit board, and a charging interface and a switch provided on the interface circuit board.

3. The safety helmet earmuff according to claim 1, characterized in that: An integrally formed light-transmitting column is provided on the inner wall of the light-transmitting area corresponding to the center position of the light-emitting unit. The incident end face of the light-transmitting column is formed as an inwardly concave curved surface for reflecting and / or focusing the light emitted by the light-emitting unit lamp. The microlens unit is a hemispherical protrusion and is arranged on the inner wall of the light-transmitting area in a hexagonal close-packed or rectangular array.

4. The safety helmet earmuff according to claim 2, characterized in that: A plurality of L-shaped support bases for supporting the main control circuit board are integrally formed on the inner wall of the earmuff shell at respective top corner positions of the main control circuit board, and wings are formed on both side edge regions of the main control circuit board for abutting against the inner side walls of the L-shaped support bases; A plurality of positioning ribs are also integrally formed on the inner wall of the earmuff shell, and the top surfaces of the plurality of positioning ribs jointly form a bearing plane that is adapted to the shape of the bottom of the interface circuit board, and the side walls of the plurality of positioning ribs jointly define the horizontal position of the interface circuit board.

5. The safety helmet earmuff according to claim 4, characterized in that: The earmuff cup body also includes a cover plate for covering and fixing the electronic warning module. The inner wall of the cover plate is integrally formed with first reinforcing ribs arranged in an interlaced manner. A plug-in board corresponding to the L-shaped support seat extends from each top corner edge of the cover plate. Two parallel tracks extending along the depth direction of the L-shaped support seat are formed in the L-shaped support seat to form a double-track slot. The end of the plug-in board is formed with a tapered introduction structure with a gradually decreasing width.

6. The safety helmet earmuff according to claim 2, characterized in that: The sound-absorbing component is provided with an avoidance notch at a position corresponding to the switch interface module; a positioning notch for preventing mistakes is provided on the edge of the open end of the earmuff shell corresponding to the position of the charging interface; a positioning column uniquely corresponding to the positioning notch is provided on the earpad fixing plate, and a fixing column for abutting and fixing the charging interface is integrally formed on the inner wall of the earpad fixing plate; a first receiving hole and a second receiving hole are provided on the earmuff shell corresponding to the positions of the charging interface and the switch, respectively, and a button for pressing the switch is accommodated in the second receiving hole.

7. The safety helmet earmuff according to claim 2, characterized in that: A plurality of evenly distributed fixing clips are provided on the inner wall of the edge of the open end of the earmuff shell, a clip is provided on the inner wall of the ear pad fixing plate for fitting with the inner wall of the earmuff shell, an annular clip groove is provided in the clip for engaging and fixing with the fixing clips, and second reinforcing ribs arranged in an interlaced manner are integrally formed on the inner wall of the ear pad fixing plate.

8. The safety helmet earmuff according to claim 1, characterized in that: One end of the connecting arm connected to the connecting base is bent into an elastic U-shaped pivot section, and the connecting base includes a main base for being mounted on the safety helmet, a rotating hub with an accommodating cavity for accommodating the U-shaped pivot section formed therein and rotatably connected to a rotating shaft extending from the middle of the main base, a rotating pin accommodated in the rotating hub and rotatably connected to the U-shaped pivot section, a pressure cover plate that cooperates with the rotating hub to encapsulate the U-shaped pivot section, and a fastener that passes through the pressure cover plate and is connected to the rotating shaft of the main base.

9. The safety helmet earmuff according to claim 1 or 8, characterized in that: The connecting arm includes a telescopic rod sleeve sleeved on the outer wall of the earmuff shell, and a connecting rod connected to the connecting seat, and the end of the connecting rod can be slidably inserted into the telescopic rod sleeve.

10. A safety protection component, characterized in that: The utility model comprises a safety helmet and the safety helmet earmuffs according to any one of claims 1 to 9 which are detachably connected to the safety helmet.

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