Hat shell applied to safety helmet and safety helmet

Abstract

The invention is suitable for the technical field of safety helmets, and provides a helmet shell applied to a safety helmet and the safety helmet. A top rib structure which is integrally formed through injection molding and protrudes outwards is arranged on the outer surface of the top of the helmet shell; the top rib structure comprises two parallel longitudinal reinforcing ribs extending in the longitudinal direction of the helmet shell and at least one transverse reinforcing rib connected with the two longitudinal reinforcing ribs and extending in the transverse direction of the helmet shell. Wherein the two longitudinal reinforcing ribs are symmetrically arranged along the two sides of the central axis of the top of the helmet shell, the transverse reinforcing rib is located in the central area of the top of the helmet shell and perpendicularly connected with the two longitudinal reinforcing ribs, the overall length of the transverse reinforcing rib is smaller than that of the longitudinal reinforcing ribs, and the cross section width of the transverse reinforcing rib is larger than that of the longitudinal reinforcing ribs. And the rib body height of the transverse reinforcing ribs at the highest point is greater than that of the longitudinal reinforcing ribs at the highest point. The safety helmet shell solves the problem that an existing safety helmet shell is insufficient in protection performance.

Description

Technical Field

[0001] The present invention relates to the technical field of safety helmets, and in particular to a helmet shell used for safety helmets and the safety helmet. Background Art

[0002] Safety helmets are important personal protective equipment in industrial production and construction. Their main function is to protect the head from damage caused by falling objects, impacts and other external forces. The structure of a safety helmet mainly includes a helmet shell, a hat lining (such as a top strap, a hat hoop, and a chin strap), etc. Among them, the helmet shell is the main protective part of the safety helmet, and its structure and material properties are crucial to the overall protective performance of the safety helmet.

[0003] At present, the common helmet shell generally adopts an elliptical or hemispherical thin shell structure. The design principle of this structure is that when subjected to impact pressure, the thin shell structure of the helmet shell will produce a certain elastic deformation under the impact pressure, using the rigidity of the material itself to absorb and disperse the impact force; at the same time, the smooth surface and circular curve of the helmet shell can make the impact object slide away, thereby reducing the impact time.

[0004] In order to further enhance the impact resistance of the top of the helmet shell, existing helmets usually have reinforcing ribs on the top of the helmet shell, namely "top ribs". The main function of the top ribs is to increase the strength of the top of the helmet shell and help disperse and absorb the impact force from above. However, after long-term practical application and research, it is found that the existing top rib design of helmets has the following shortcomings:

[0005] Insufficient impact resistance: Although the current mainstream top rib design (such as single top rib, three top rib, five top rib, "V" top rib, etc.) can partially enhance the rigidity of the cap shell, its linear or symmetrically distributed rib structure has a single energy dispersion path when subjected to asymmetric impact or composite impact, resulting in local stress concentration, which is difficult to fully meet the protection needs in high-intensity working environments. Especially when facing a large impact force or impact from a sharp object, the existing top rib structure is prone to local buckling or damage, resulting in a decrease in protection performance.

[0006] Single energy absorption mechanism: Most existing top ribs are rigid support structures that only enhance local strength through geometric shapes, lacking active absorption of impact kinetic energy and multi-level buffering design. When the impact force exceeds the yield strength of the material, stress cracks are prone to occur at the connection between the top rib and the cap shell, resulting in a sharp drop in protection performance.

[0007] At the same time, existing safety helmets often need to be equipped with accessories such as lighting fixtures (such as mining lamps, headlights), warning equipment or communication devices. Traditional installation methods, such as fixing with screws, require drilling holes in the helmet shell, and any form of drilling will destroy the structural integrity of the helmet shell, reduce its inherent impact strength and ability to disperse impact force, especially forming stress concentration points near the drilled holes, which may be the first to be damaged when subjected to force. In addition, in some special working environments (such as the power industry), the helmet shell is not allowed to have metal parts or openings to ensure insulation performance. Other methods such as strap fixing, because the surface of the helmet shell is usually smooth, the strap is easy to slide or even fall off, and the fixation is not reliable, affecting the safety and efficiency of the operation. If magnetic suction or adhesive fixing is used, there are risks such as insufficient magnetic force or adhesive force, failure due to dust or chemical substances, or aging and falling off of the adhesive, and it is not easy to disassemble and replace. These methods have failed to take into account the convenience and stability of accessory installation and the maintenance of the protective performance of the helmet shell body.

[0008] At the same time, the inner side of the helmet shell is fixed to the connector of the top band by setting a fixing groove. However, the connector on the existing top band and the fixing groove on the helmet shell are both square. This traditional square connection structure has obvious defects in the injection molding process. Specifically, during the injection molding process, the flow state of the plastic melt changes dramatically when it flows through the sharp corners of the square fixing groove and the square connector. This drastic change causes a large stress concentration at the sharp corners. When the helmet is impacted or vibrated, these residual stresses can easily cause cracks to gradually expand or even break at the sharp corners, thereby reducing the protective performance of the helmet and threatening the safety of the user.

[0009] Therefore, in view of the above-mentioned problems existing in the existing safety helmets, it is urgent to develop a new type of safety helmet structure to improve the overall impact resistance of the safety helmet and meet higher intensity protection needs. Summary of the invention

[0010] Based on this, the purpose of the present invention is to provide a helmet shell and a safety helmet for use in a safety helmet, so as to fundamentally solve the problem of insufficient protective performance of the existing safety helmet shell.

[0011] According to an embodiment of the present invention, a cap shell applied to a safety helmet, the outer surface of the top of the cap shell is provided with a top rib structure which is integrally injection-molded and protrudes outward;

[0012] The top rib structure includes two longitudinal reinforcing ribs extending in the longitudinal direction of the cap shell and being parallel to each other, and at least one transverse reinforcing rib connecting the two longitudinal reinforcing ribs and extending in the transverse direction of the cap shell;

[0013] Among them, the two longitudinal reinforcing ribs are arranged symmetrically on both sides of the central axis of the top of the cap shell, the transverse reinforcing rib is located in the central area of ​​the top of the cap shell and is vertically connected to the two longitudinal reinforcing ribs, the overall length of the transverse reinforcing rib is smaller than the overall length of the longitudinal reinforcing rib, the cross-sectional width of the transverse reinforcing rib is larger than the cross-sectional width of the longitudinal reinforcing rib, and the rib body height of the transverse reinforcing rib at the highest point is larger than the rib body height of the longitudinal reinforcing rib at the highest point.

[0014] In addition, the cap shell applied to a safety helmet according to the above embodiment of the present invention may also have the following additional technical features:

[0015] Furthermore, the rib height and / or rib thickness of the longitudinal reinforcing rib and / or the transverse reinforcing rib are / is distributed non-constantly along their own length direction and width direction.

[0016] Furthermore, the thickness of the longitudinal reinforcing rib and / or the transverse reinforcing rib at a connection portion close to the cap shell is greater than the thickness of the rib at a top end away from the cap shell.

[0017] Furthermore, the rib height of the longitudinal reinforcing rib and / or the transverse reinforcing rib gradually increases from a connection point close to the cap shell toward a direction away from the top end of the cap shell.

[0018] Furthermore, the longitudinal reinforcing ribs and the transverse reinforcing ribs are smoothly transitioned and merged with the surface of the cap shell body, and the transition fillet radius of the arc-shaped transition zone where the longitudinal reinforcing ribs are connected to the surface of the cap shell body gradually increases from the end edge of the longitudinal reinforcing ribs toward the middle intersection area close to the transverse reinforcing ribs.

[0019] Furthermore, the transition fillet radius of the outer arc transition zone of the longitudinal reinforcing rib away from the center line of the helmet shell is greater than the transition fillet radius of the inner arc transition zone of the longitudinal reinforcing rib facing the center line of the helmet shell at the corresponding position along its length direction.

[0020] Furthermore, the outer surface of the cap shell is provided with a first fixing member and a second fixing member integrally formed by injection molding and symmetrically distributed front and back along the central axis;

[0021] The first fixing member comprises a slot-shaped structure consisting of two parallel first and second slots respectively used to fix different lighting fixtures;

[0022] The second fixing member includes two buckles for fixing the cable, which are symmetrically distributed along the central axis, and symmetrical sliding grooves are respectively provided on the side walls adjacent to the two buckles. The sliding grooves arranged between the two buckles together form a clamping structure for clamping the handle of the warning lamp.

[0023] Furthermore, a plurality of fixing grooves with arc-shaped inner surfaces are provided on the inner side of the cap shell, and a limiting portion for limiting the top strap of the safety helmet is provided on the inner side wall of the fixing groove, and the limiting portion cooperates with the corresponding structure provided on the top strap.

[0024] Furthermore, an inner edge reinforcing rib integrally injection-molded and protruding from the inner surface is provided on the inner surface of the lower edge of the cap shell.

[0025] Another object of an embodiment of the present invention is to provide a safety helmet, including a cap shell applied to the safety helmet as described above, a top strap fixedly connected to the cap shell, a cap hoop fixedly connected to the top strap, and a chin strap fixedly connected to the cap hoop.

[0026] The cap shell applied to the safety helmet provided by the embodiment of the present invention, by providing a top rib structure composed of two longitudinal reinforcing ribs and at least one central transverse reinforcing rib on the top of the cap shell, constructs a strong top load-bearing frame, which can efficiently disperse the impact force to a wider cap shell area, further improving the overall protection effect; and by arranging the transverse reinforcing rib in the central area of the top of the cap shell that is most vulnerable to impact, and being designed with a cross-sectional width greater than that of the longitudinal reinforcing rib and a highest point rib body height also greater than that of the longitudinal reinforcing rib, the transverse reinforcing rib can extremely effectively resist and absorb the direct impact energy from the top, and its larger width and height significantly improve the bending stiffness and load-bearing capacity of the center area of the cap top, greatly reducing the deformation amount of the cap shell under impact, thereby greatly enhancing the protection performance against vertical falling objects; solving the problem of insufficient protection performance of the cap shell of the existing safety helmet. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the cap shell applied to the safety helmet in the first embodiment of the present invention from the first perspective;

[0028] Figure 2 is a schematic structural diagram of the cap shell applied to the safety helmet in the first embodiment of the present invention from the second perspective;

[0029] Figure 3 is a schematic structural diagram of the cap shell applied to the safety helmet in the first embodiment of the present invention from the third perspective;

[0030] Figure 4 is Figure 2 a schematic cross-sectional view of part A-A in;

[0031] Figure 5 is Figure 2 a schematic cross-sectional view of part A-A in the fourth perspective;

[0032] Figure 6 is Figure 3 a schematic cross-sectional view of part B-B in;

[0033] Figure 7 is Figure 3 The schematic cross-sectional view of the B-B part in the fifth perspective;

[0034] Figure 8 is Figure 1 The enlarged view of the part Ⅱ in the circle;

[0035] Figure 9 The exploded view of the safety helmet in the second embodiment of the present invention in the sixth perspective;

[0036] Figure 10 The schematic structural view of the safety helmet system in the third embodiment of the present invention in the seventh perspective;

[0037] Figure 11 The exploded view of the safety helmet system in the third embodiment of the present invention in the eighth perspective;

[0038] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific Embodiments

[0039] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] Embodiment 1

[0043] Please refer to Figures 1 - 8, which is a cap shell applied to a safety helmet in the first embodiment of the present invention. For the convenience of explanation, only the part related to the embodiment of the present invention is shown. The cap shell applied to a safety helmet provided by the embodiment of the present invention has a top rib structure 11 which is integrally injection-molded and protrudes outwardly on the outer surface of the top of the cap shell;

[0044] The top rib structure 11 includes two longitudinal reinforcing ribs 111 extending in parallel along the longitudinal direction of the helmet shell, and at least one transverse reinforcing rib 112 connecting the two longitudinal reinforcing ribs 111 and extending in the transverse direction of the helmet shell;

[0045] Among them, the two longitudinal reinforcing ribs 111 are arranged symmetrically on both sides of the central axis of the top of the cap shell, the transverse reinforcing ribs 112 are located in the central area of ​​the top of the cap shell and are vertically connected to the two longitudinal reinforcing ribs 111, the overall length of the transverse reinforcing ribs 112 is smaller than the overall length of the longitudinal reinforcing ribs 111, the cross-sectional width of the transverse reinforcing ribs 112 is larger than the cross-sectional width of the longitudinal reinforcing ribs 111, and the rib body height of the transverse reinforcing ribs 112 at the highest point is greater than the rib body height of the longitudinal reinforcing ribs 111 at the highest point.

[0046] Among them, in one embodiment of the present invention, the shell of the safety helmet is the main part of the safety helmet, wherein the overall shape of the shell is hemispherical or ellipsoidal or similar, and the interior is hollow to accommodate the wearer's head and provide basic protection space for the head. The shell is usually made of high-strength, high-toughness, impact-resistant engineering plastics, such as ABS (acrylonitrile-butadiene-styrene copolymer), PC (polycarbonate), HDPE (high-density polyethylene) and other materials, and is manufactured through an integrated injection molding process. The one-piece injection molding method ensures the structural integrity and strength of the shell, and avoids the weak connection points that may be caused by the splicing structure. The top outer surface of the shell is the main area that bears the impact of falling objects. For this reason, the embodiment of the present invention is provided with an integral injection-molded and outwardly protruding top rib structure 11 on the top outer surface of the shell, thereby improving the impact resistance and structural rigidity of the top of the shell.

[0047] Specifically, in one embodiment of the present invention, the top rib structure 11 specifically includes two longitudinal reinforcing ribs 111 and at least one transverse reinforcing rib 112, wherein in the embodiment of the present invention, there is specifically one transverse reinforcing rib 112. It can be understood that in other embodiments of the present invention, it can also be other numbers of transverse reinforcing ribs 112, which are set according to actual use needs and are not specifically limited here. The two longitudinal reinforcing ribs 111 extend in the longitudinal direction of the cap shell (usually from the forehead to the back of the head) and are arranged parallel to each other, and the two longitudinal reinforcing ribs 111 are symmetrically arranged on both sides of the central axis of the top of the cap shell (front and back direction), ensuring the balance of the cap shell when subjected to force. The transverse reinforcing rib 112 extends in the transverse direction of the cap shell (usually from the left ear to the right ear), and is approximately vertically connected to the two longitudinal reinforcing ribs 111, forming a structural layout similar to an "H" shape. The transverse reinforcing rib 112 is located in the central area of ​​the top of the cap shell, that is, the key part that is most likely to withstand the impact of vertical falling objects, and is vertically connected to the two longitudinal reinforcing ribs 111, forming a stable grid-like reinforcement structure.

[0048] Among them, the longitudinal reinforcement rib 111 is the main structure that mainly bears the impact force from the front or rear of the top of the helmet shell, and disperses and transmits the impact force along the longitudinal direction of the helmet shell. Therefore, the setting of the longitudinal reinforcement rib 111 significantly improves the overall stiffness of the helmet shell in the front and rear directions, and resists longitudinal bending deformation. At the same time, it helps to guide the falling objects to slide to both sides, reducing the duration and energy absorption of the frontal impact. The transverse reinforcement rib 112 connects the two longitudinal reinforcement ribs 111 to prevent the two longitudinal reinforcement ribs 111 from opening outward or closing inward when subjected to force, forming a stable frame structure, so as to provide stiffness in the left and right directions of the safety helmet edge to resist lateral pressure or impact. At the same time, as the intersection of forces, the transverse reinforcement rib 112 distributes the impact force between the two longitudinal reinforcement ribs 111 and transmits it to both sides of the helmet shell to achieve more comprehensive force dispersion. At the same time, the transverse reinforcement rib 112 can also directly withstand the impact force falling on it.

[0049] In order to optimize the structural performance, in the embodiment of the present invention, reference is made to Figure 1 and Figure 3As shown, the overall length of the transverse reinforcement rib 112 is designed to be smaller than the longitudinal reinforcement rib 111, so that the transverse reinforcement rib 112 mainly plays a role of connection and central reinforcement, while the longitudinal reinforcement rib 111 runs through most of the length of the top of the helmet shell, ensuring the through reinforcement from front to back, so as to provide a wider coverage of longitudinal support and force conduction path. Further, the cross-sectional width of the transverse reinforcement rib 112 (i.e., the width of the rib body on the surface of the helmet shell) is usually designed to be larger than the cross-sectional width of the longitudinal reinforcement rib 111, that is, the transverse reinforcement rib 112 is more "thick". Specifically, the transverse reinforcement rib 112 is a key beam and stress concentration point connecting the two longitudinal reinforcement ribs 111 (main load-bearing ribs). The transverse reinforcement rib 112 (especially in the intersection area) needs to be specially strengthened, wherein increasing the width of the transverse reinforcement rib 112 can increase the cross-sectional area, so that it can directly improve its own strength and stiffness, as well as the reliability of the connection node, thereby significantly enhancing the overall stability and connection strength of the helmet shell, and improving the resistance to complex impacts (including lateral component forces). Furthermore, the rib height of the transverse reinforcement 112 at the highest point is also greater than the rib height of the longitudinal reinforcement 111 at the highest point, that is, the transverse reinforcement 112 protrudes higher in the top central area. Specifically, the absolute highest point of the helmet shell is often located in the top center area, which is the position of the transverse reinforcement 112. According to the principles of material mechanics, increasing the cross-sectional height can significantly improve the bending stiffness of the component. At this time, by designing the rib height of the transverse reinforcement 112 at the highest point to be maximum, the bending section modulus of this key point can be maximized, so that it has the strongest bending and puncture resistance. Therefore, the higher transverse reinforcement 112 greatly enhances the ability of the center of the top of the helmet shell to resist impact deformation, so that the strongest impact resistance can be given to the most prominent center position of the top of the helmet shell, thereby improving safety performance.

[0050] Furthermore, in one embodiment of the present invention, in order to further optimize the mechanical properties, the rib height and / or rib thickness of the longitudinal reinforcing ribs 111 and / or the transverse reinforcing ribs 112 in the top rib structure 11 are non-constantly distributed along their own length and width directions. At this time, this non-uniform design allows accurate allocation of materials according to the stress conditions and structural requirements at different positions to achieve the optimization of the strength-to-weight ratio. Specifically, the rib thickness of the longitudinal reinforcing ribs 111 and / or the transverse reinforcing ribs 112 at the connection close to the helmet shell is greater than the rib thickness at the top away from the helmet shell. That is, referring to Figures 4 - 7As shown, the cross section of the longitudinal reinforcing rib 111 and / or the transverse reinforcing rib 112 is designed so that the thickness (width) of the rib near the connection (root) of the cap shell is greater than the thickness of the rib at the top (top ridge) away from the cap shell. It is usually manifested as a rounded trapezoidal cross section with a draft angle that meets the requirements of injection molding demolding, which greatly facilitates the demolding of injection molded parts and improves production efficiency and product yield; at the same time, the wider root provides a larger contact area and connection basis with the cap shell body, ensuring that the rib can stably transfer the load when subjected to force, and is not easy to be damaged or peeled off from the root, so as to ensure the strength and stability of the connection with the cap shell body, avoid stress concentration, and facilitate the formation of an effective transition fillet. At the same time, distributing more materials at the root away from the neutral axis can more effectively improve the bending stiffness. The reduction in the width of the top removes relatively small contributions while ensuring sufficient strength, thereby effectively reducing the weight of the rib and even the entire cap shell, and improving wearing comfort.

[0051] Furthermore, in one embodiment of the present invention, the rib height of the longitudinal reinforcing rib 111 and / or the transverse reinforcing rib 112 gradually increases from the connection point close to the cap shell to the direction away from the top of the cap shell, that is, the rib height of the top rib structure 11 gradually increases from the connection point (root) of the cap shell to the direction away from the top of the cap shell (top ridge) in both the transverse and longitudinal directions, and then gradually decreases toward the connection point (root) of the other end of the cap shell, which allows the highest rib to be set in an area away from the surface of the cap shell, that is, the top center or intersection of the cap shell, which is the key area that is most susceptible to direct impact and has the most concentrated stress, thereby maximizing the use of the height advantage to resist impact energy and puncture, and improving the impact resistance, puncture resistance and bending resistance of the area. At the same time, the rib height gradually decreases toward the end root to form a natural slope, which helps to guide and disperse the impact force more smoothly to a wider area of ​​the main body of the cap shell, avoiding stress concentration caused by sudden height changes. At the same time, while ensuring the strength of the core area, the height of non-critical areas (such as joints) is reduced, and the material configuration is further optimized, which helps to achieve overall lightweight and also helps to smoothly integrate with the helmet shell.

[0052] Furthermore, in one embodiment of the present invention, the longitudinal reinforcing ribs 111 and the transverse reinforcing ribs 112 are smoothly transitioned and integrated with the surface of the shell body, and the transition fillet radius of the arc transition zone 113 where the longitudinal reinforcing ribs 111 are connected to the surface of the shell body gradually increases from the end edge of the longitudinal reinforcing ribs 111 to the middle intersection area close to the transverse reinforcing ribs 112. At this time, the smooth transition and integration between the top rib structure 11 and the surface of the shell body ensures the formation of a smooth transition curved surface without sharp corners, thereby avoiding sharp corners, significantly reducing stress concentration, preventing cracks under impact, improving the integrity and fatigue resistance and impact resistance of the structure, and also making the appearance more smooth and beautiful. At the same time, the transition fillet radius of the arc transition zone 113 (i.e., the root fillet) at the connection between the longitudinal reinforcing rib 111 and the cap shell body is not constant, but gradually increases from the end edge of the longitudinal reinforcing rib 111 to the middle intersection area close to the transverse reinforcing rib 112, so that the maximum stress relief effect (i.e., the maximum transition fillet radius) is accurately applied to the middle intersection area with the highest stress and the most need for reinforcement, further optimizing the stress distribution and improving the strength and reliability of this key connection area. For the relatively small stress-bearing end, a smaller fillet is used to achieve refined management of stress distribution and optimized stress relief, greatly improving the fatigue life and impact damage resistance of the connection area.

[0053] Further, in one embodiment of the present invention, referring to Figure 6 As shown, the transition fillet radius of the outer arc transition zone 1131 of the longitudinal reinforcing rib 111 away from the center line of the cap shell is larger than the transition fillet radius of the inner arc transition zone 1132 of the longitudinal reinforcing rib 111 facing the center line of the cap shell at the corresponding position along the length direction thereof. That is, at any corresponding position point along the length direction of the longitudinal reinforcing rib 111 (i.e., the same transverse axis), the transition fillet radius of the outer arc transition zone 1131 away from the center line of the cap shell is larger than the transition fillet radius of the inner arc transition zone 1132 facing the center line of the cap shell. Specifically, considering that the outer side of the cap shell usually has a larger curvature radius and may be subjected to a different bending stress mode from the inner side or the stress needs to be dispersed to a wider range, the use of a larger outer fillet radius can more effectively reduce the outer stress peak, so that the force is more gently introduced into the cap shell, thereby improving the structural stability and reliability of the cap shell under complex stress conditions. At the same time, this asymmetric design improves the structure's adaptability and resistance to eccentric impacts or complex loads, makes the stress distribution more balanced and reasonable, and further enhances the overall structural reliability of the helmet.

[0054] Among them, in an embodiment of the present invention, in order to facilitate the installation of working attachments without damaging the main body of the cap shell, the outer surface of the cap shell is provided with a first fixing member 12 and a second fixing member 13 which are integrally injection-molded and symmetrically distributed before and after along the central axis; the first fixing member 12 includes a groove-shaped structure composed of a first card slot 121 and a second card slot 122 which are parallel to each other and are respectively used for fixing different lighting fixtures; the second fixing member 13 includes two buckles for fixing cables which are symmetrically distributed left and right along the central axis, and symmetric sliding grooves 131 are respectively provided on the side walls of the two adjacent buckles, and the sliding grooves 131 arranged between the two buckles together form a clamping structure for clamping the handle of the warning lamp. At this time, by providing standardized attachment installation interfaces (the first fixing member 12 and the second fixing member 13) that do not require drilling, the integrity and strength of the cap shell are maintained, ensuring that the safety helmet can effectively protect the head when impacted, greatly expanding the applicable scenarios and functionality of the safety helmet, and improving the operation convenience and safety.

[0055] Among them, in an embodiment of the present invention, the first fixing member 12 is connected to the outer surface of the cap shell through an integral injection molding process and is located at the front part of the cap shell (along the central axis of the safety helmet). Specifically, referring to Figure 8 as shown, the first fixing member 12 is a groove-shaped structure, including two parallel first card slots 121 and second card slots 122. The first card slot 121 and the second card slot 122 are sequentially arranged outward on the outer surface of the cap shell, and the opening of the first card slot 121 is larger than the opening of the second card slot 122. Specifically, the first card slot 121 is located inside and has a larger opening, and is used for fixing the rotating structure of the headlamp. Among them, referring to Figure 10 and Figure 11As shown, the rotating structure is usually a plastic part with a pivot. The lighting headlamp can rotate around it to adjust the irradiation angle, and an elastic buckle is provided on the rotating structure for elastic deformation during the insertion and removal of the elastic buckle into and out of the first card slot 121. Further, a receiving notch 123 is provided at the bottom of the first card slot 121 for receiving the elastic buckle on the rotating structure of the lighting headlamp to increase the fixing stability. At this time, during the process of inserting the rotating structure of the lighting headlamp into the first card slot 121, the elastic buckle first undergoes elastic deformation. After the rotating structure is completely inserted, its elastic buckle is received in the receiving notch 123 and resumes deformation, thereby realizing the snap-fitting and fixing of the rotating structure of the lighting headlamp and the first card slot 121. The second card slot 122 is located inside and has a smaller opening for fixing the cap hook of the cordless lamp. The cap hook of the cordless lamp is usually a metal or plastic hook that can be inserted into the second card slot 122. At this time, it should be noted that the opening of the first card slot 121 is set larger than the opening of the second card slot 122, mainly because the larger opening of the first card slot 121 can provide enough space for the deformation of the elastic buckle during insertion and removal. During the use of the cordless lamp, it may be subjected to large vibrations or impacts. At this time, the smaller opening of the second card slot 122 can form a "jamming" effect, thereby more tightly restraining the cap hook of the cordless lamp and preventing it from shaking or falling off inside the second card slot 122. At the same time, the opening of the first card slot 121 is larger than the opening of the second card slot 122, which makes it convenient to set the receiving notch 112 for receiving the elastic buckle and convenient for effectively operating and pressing the elastic buckle to remove the lighting headlamp.

[0056] Further, the first fixing member 12 is also provided with a reinforcing structure 124 respectively connected to the outer surface of the cap shell and the groove structure. The reinforcing structure 124 is located between the outer surface of the cap shell and the side wall of the groove structure in the first fixing member 12. The reinforcing structure 124 is usually provided with reinforcing ribs or thickening treatment to improve the strength and anti-deformation ability of the first fixing member 12. Refer to Figure 8 As shown, the reinforcing structure 124 is a reinforcing rib connecting the outer surface of the cap shell and the first card slot 121.

[0057] Among them, in an embodiment of the present invention, the second fixing member 13 is integrally injection-molded with the cap shell and is located at the rear of the outer surface of the cap shell. Two buckles are symmetrically distributed along the central axis. Each buckle has an opening which is generally in a "C" shape and is used to snap into a cable rope or other linear accessories. The two buckles are inclined upward perpendicular to the outer surface of the cap shell. Usually, the rear of the safety helmet is the position of the wearer's back of the head. At this time, the upward inclination of the buckles can better conform to the curve of the head, making the fixed cable rope or other accessories fit the head better and reducing the discomfort and shaking during wearing. And when the cable rope is subjected to a tensile force, the inclined buckles can decompose the tensile force into upward and backward component forces. The upward component force helps to fix the safety helmet more tightly on the head and prevent the safety helmet from tilting backward or falling off due to the tensile force. At the same time, the inclined design makes the opening of the buckle face obliquely upward, which is more convenient for the wearer to snap the cable rope in or out, especially when wearing gloves or in inconvenient operation. On one side of each buckle close to the central axis, there is a chute 131, and the chute 131 is also inclined upward. The chutes 131 arranged between the two buckles together form a complete clamping structure for clamping the handle of the warning lamp, facilitating the insertion and removal of the handle of the warning lamp. At the same time, the upwardly inclined chute 131 can guide the warning lamp to irradiate upward, thereby expanding the warning range and improving safety. Further, referring to Figure 4 As shown, the top opening of the chute 131 is larger than the bottom opening of the chute 131, forming an inverted trapezoidal structure, which is convenient for the insertion of the handle of the warning lamp and prevents it from accidentally slipping out. Further, the chute 131 and the handle of the warning lamp are respectively provided with a first limiting structure (not shown in the figure) and a second limiting structure that cooperate with each other to play a role in limiting and preventing the handle of the warning lamp from falling off. And by setting the inverted trapezoidal structure, the handle of the warning lamp can be gradually clamped and finally locked. The side wall of the chute 131 is provided with a second limiting groove or a second limiting protrusion or a second magnetic attracting member corresponding to the first limiting protrusion or the first limiting groove or the first magnetic attracting member provided on the handle of the warning lamp. Specifically, the handle of the warning lamp has a first limiting protrusion, and a second limiting groove (not shown in the figure) is provided on the inner wall of the chute 131. After the handle of the warning lamp is snapped into the second fixing member 13 through the chute 131, the first limiting protrusion and the second limiting groove cooperate with each other to play a role in limiting and preventing falling off. Of course, the first limiting structure and the second limiting structure can also be a second limiting protrusion and a first limiting groove that cooperate with each other, or a first magnetic attracting member and a second magnetic attracting member that attract each other, which are not specifically limited here.

[0058] Further, in an embodiment of the present invention, a plurality of fixing grooves 14 with an arc-shaped inner surface are provided on the inner side of the cap shell, and a limiting portion 143 for limiting the top strap of the safety helmet is provided on the inner side wall of the fixing groove 14, and the limiting portion 143 cooperates with the corresponding structure provided on the top strap. The limiting portion 143 and the corresponding structure provided on the top strap of the safety helmet are precisely matched. Specifically, refer to Figure 9 As shown, the end of the top strap 20 is bifurcated and provided with an inclined fixing portion 21 matching each fixing groove 14 and a fixing hole 22 for connecting and fixing the cap hoop 30, and a limiting groove 211 engaged with the limiting portion 143 is provided on the fixing portion 21. Refer to Figures 1 - 7 As shown, four first fixing grooves 141 are circumferentially symmetrically distributed on the inner side of the cap shell, and four second fixing grooves 142 are symmetrically distributed on the left and right sides of the cap shell. Among them, the four first fixing grooves 141 are circumferentially symmetrically distributed along the bottom edge of the cap shell (for example, one in the front, back, left, and right), and the four second fixing grooves 142 are symmetrically distributed in the middle of the left and right sides of the cap shell (for example, two on the left and right). Therefore, by providing a plurality of fixing grooves 14, the connection strength between the cap shell and the top strap 20 can be effectively increased. At this time, the design of the fixing groove 14 with an arc-shaped inner surface and the matching fixing portion eliminates the sharp corner stress concentration, improves the strength and toughness of the connection, and at the same time, the arc-shaped inner surface optimizes the force, avoids sharp corners, improves the fluidity of the plastic melt in the mold, reduces the stress concentration, reduces the risk of defects such as cracking and material shortage, and improves the qualified rate and service life of the product. And through the cooperation of the limiting portion 143 and the limiting groove 211, it is ensured that the top strap can be firmly locked once it is installed in place, realizing double locking, preventing loosening, rotation or falling off during use, ensuring the firm and reliable connection between the top strap and the cap shell, and at the same time facilitating the disassembly, replacement and cleaning of the top strap.

[0059] Further, in an embodiment of the present invention, an inner edge reinforcing rib 15 integrally injection-molded and protruding from the inner surface (that is, protruding downward from the bottom edge of the cap shell) is provided on the inner surface of the lower edge of the cap shell. Refer to Figures 4 - 7 As shown, the inner edge reinforcing rib 15 is usually designed with a wavy or arc-shaped profile. The inner edge reinforcing rib 15 significantly enhances the stiffness and strength of the cap shell edge, resists bending deformation and impact damage, improves the overall structural stability of the cap shell, and makes it not easily deformed or broken due to lateral extrusion or collision.

[0060] In summary, for the shell of the safety helmet in the above embodiments of the present invention, by setting a top rib structure composed of two longitudinal reinforcing ribs and at least one central transverse reinforcing rib at the top of the shell, a strong top load-bearing framework is constructed, which can efficiently disperse the impact force to a wider shell area, further improving the overall protection effect; and by arranging the transverse reinforcing rib in the central area at the top of the shell that is most vulnerable to impact, and being designed with a cross-sectional width greater than that of the longitudinal reinforcing rib and a highest rib body height also greater than that of the longitudinal reinforcing rib, the transverse reinforcing rib can extremely effectively resist and absorb the direct impact energy from the top, and its larger width and height significantly improve the bending stiffness and load-bearing capacity of the central area of the cap top, greatly reducing the deformation amount of the shell under impact, thereby greatly enhancing the protection performance against vertical falling objects; and by adopting a non-constant rib body height and / or thickness distribution (such as thick at the root and thin at the top; high in the middle and low at both ends), the optimized layout of materials is realized, and the materials are used in the places where strengthening is most needed, avoiding unnecessary weight increase, and while ensuring or even enhancing the protection performance, it helps to reduce the overall weight of the safety helmet and improve the wearing comfort; and by setting the transition fillet radius of the root of the longitudinal reinforcing rib to gradually increase from the end to the middle connection area, and the design of asymmetric fillets on the inner and outer sides, the stress concentration in the key connection area is specifically alleviated, the fatigue resistance and impact toughness of the structure are improved, the service life of the shell is extended, and it is more reliable in harsh environments; at the same time, by setting the first fixing part and the second fixing part integrally injection-molded on the outer surface of the shell, a stable, reliable and convenient installation platform is provided for accessories such as lighting fixtures, cables, warning lights, etc., avoiding the inconvenience and potential safety hazards brought by additional accessories, and enhancing the versatility and practicality of the safety helmet; and by setting a fixing groove with a limiting part on the inner side of the shell, the firm connection between the top strap and the shell is ensured, ensuring that the impact energy can be effectively transmitted and absorbed; and by setting an inner edge reinforcing rib at the lower edge of the shell, the stiffness of the shell edge is enhanced, the lateral pressure resistance and the stability of the overall structure are improved; the problem of insufficient protection performance of the shell of the existing safety helmet is solved.

[0061] Embodiment 2

[0062] Please refer to Figure 9, shown is the safety helmet in the second embodiment of the present invention. For the sake of convenience in description, only the parts related to the embodiments of the present invention are shown. The safety helmet provided by the embodiments of the present invention includes a helmet shell 10 applied to the safety helmet as described in the foregoing embodiments, a top strap 20 fixedly connected to the helmet shell 10, a cap band 30 fixedly connected to the top strap 20, and a chin strap 40 fixedly connected to the cap band 30. Further, in an embodiment of the present invention, the safety helmet further includes a sweat-absorbing band 50 fixedly connected to the cap band 30. The specific content in the safety helmet and the helmet shell 10 applied to the safety helmet can be referred to the foregoing embodiments. The implementation principle and the technical effects produced are the same as those of the foregoing embodiments. For a brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding content in the foregoing embodiments.

[0063] Embodiment Three

[0064] Please refer to Figures 10 - 11 , shown is the safety helmet system in the third embodiment of the present invention. For the sake of convenience in description, only the parts related to the embodiments of the present invention are shown. The safety helmet system provided by the embodiments of the present invention includes any one or more of a lighting headlamp 2 having a rotating structure 21, a cordless lamp 3 having a cap hook 31, and a warning lamp 4 having a handle 41, and a safety helmet 1 as described in the foregoing embodiments; the first card slot 121 of the safety helmet 1 is used to fix the rotating structure 21 of the lighting headlamp 2, the second card slot 122 of the safety helmet 1 is used to fix the cap hook 31 of the cordless lamp 3, and the chute 131 of the safety helmet 1 is used to engage the handle 41 of the warning lamp 4. The specific content in the safety helmet system and the safety helmet 1 can be referred to the foregoing embodiments. The implementation principle and the technical effects produced are the same as those of the foregoing embodiments. For a brief description, for the parts not mentioned in this embodiment, reference can be made to the corresponding content in the foregoing embodiments.

[0065] In the description of this specification, the descriptions with reference to the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean 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 invention. In this specification, the schematic representations 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.

[0066] The above-described embodiments only represent several implementation manners of the present invention. The descriptions are relatively specific and detailed, but should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A cap shell for a safety helmet, characterized in that: The outer surface of the top of the cap shell is provided with a top rib structure which is integrally injection-molded and protrudes outward; The top rib structure includes two longitudinal reinforcing ribs extending in the longitudinal direction of the cap shell and being parallel to each other, and at least one transverse reinforcing rib connecting the two longitudinal reinforcing ribs and extending in the transverse direction of the cap shell; Among them, the two longitudinal reinforcing ribs are arranged symmetrically on both sides of the central axis of the top of the cap shell, the transverse reinforcing rib is located in the central area of ​​the top of the cap shell and is vertically connected to the two longitudinal reinforcing ribs, the overall length of the transverse reinforcing rib is smaller than the overall length of the longitudinal reinforcing rib, the cross-sectional width of the transverse reinforcing rib is larger than the cross-sectional width of the longitudinal reinforcing rib, and the rib body height of the transverse reinforcing rib at the highest point is larger than the rib body height of the longitudinal reinforcing rib at the highest point.

2. The cap shell for a safety helmet according to claim 1, characterized in that: The rib height and / or rib thickness of the longitudinal reinforcing rib and / or the transverse reinforcing rib are / is distributed non-constantly along their own length direction and width direction.

3. The cap shell for a safety helmet according to claim 2, characterized in that: The thickness of the longitudinal reinforcing rib and / or the transverse reinforcing rib at a connection portion close to the cap shell is greater than the thickness of the rib at a top portion away from the cap shell.

4. The cap shell for a safety helmet according to claim 2, characterized in that: The rib height of the longitudinal reinforcing rib and / or the transverse reinforcing rib gradually increases from the connection point close to the cap shell to the direction away from the top end of the cap shell.

5. The cap shell for a safety helmet according to claim 1, characterized in that: The longitudinal reinforcing ribs and the transverse reinforcing ribs are smoothly transitioned and merged with the surface of the cap shell body, and the transition fillet radius of the arc-shaped transition zone where the longitudinal reinforcing ribs are connected to the surface of the cap shell body gradually increases from the end edge of the longitudinal reinforcing ribs toward the middle intersection area close to the transverse reinforcing ribs.

6. The cap shell for a safety helmet according to claim 5, characterized in that: The transition fillet radius of the outer arc transition zone of the longitudinal reinforcing rib away from the center line of the helmet shell is greater than the transition fillet radius of the inner arc transition zone of the longitudinal reinforcing rib facing the center line of the helmet shell at the corresponding position along its length direction.

7. The cap shell for a safety helmet according to claim 1, characterized in that: The outer surface of the cap shell is provided with a first fixing member and a second fixing member integrally formed by injection molding and symmetrically distributed front and back along the central axis; The first fixing member comprises a slot-shaped structure consisting of two parallel first and second slots respectively used to fix different lighting fixtures; The second fixing member includes two buckles for fixing the cable, which are symmetrically distributed along the central axis, and symmetrical sliding grooves are respectively provided on the side walls adjacent to the two buckles. The sliding grooves arranged between the two buckles together form a clamping structure for clamping the handle of the warning lamp.

8. The cap shell for a safety helmet according to claim 1, characterized in that: A plurality of fixing grooves with arc-shaped inner surfaces are arranged on the inner side of the helmet shell, and a limiting portion for limiting the top strap of the safety helmet is arranged on the inner side wall of the fixing groove, and the limiting portion cooperates with a corresponding structure arranged on the top strap.

9. The cap shell for a safety helmet according to claim 1, characterized in that: The inner surface of the lower edge of the cap shell is provided with an inner edge reinforcement rib which is integrally injection-molded and protrudes from the inner surface.

10. A safety helmet, characterized in that: The invention comprises a helmet shell applied to a safety helmet as claimed in any one of claims 1 to 9, a top strap connected and fixed to the helmet shell, a hat hoop connected and fixed to the top strap, and a chin strap connected and fixed to the hat hoop.

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