Protective device

Abstract

A protective device (1000), comprising a helmet shell (10). At least one first connecting member (11) is provided on the exterior of the helmet shell (10), the at least one first connecting member (11) and the helmet shell (10) are integrally formed, and a reinforcing structure (13) is provided between the at least one first connecting member and the helmet shell (10). The first connecting member (11) and the helmet shell (10) are integrally formed, and thus, the connection strength therebetween is relatively high; moreover, the reinforcing structure (13) provided between the first connecting member (11) and the helmet shell (10) can further improve the strength of the first connecting member (11), thereby improving the mounting strength of an accessory on the helmet shell (10). An H-shaped reinforcing rib (18) on the helmet shell (10) is highly identifiable and can improve strength. An injection molding port (14) of the helmet shell (10) is located on the inner side of the helmet shell (10), thereby reducing the impact on strength. Arc-shaped structures of a fixing slot (16) on the helmet shell (10) and a fixing block (21) of a crown strap (20) facilitate forming. An adjustment structure (31) of a headband (30) is simple and easy to adjust, and a chin strap (40) is integrally formed with some accessories, thereby simplifying the manufacturing process.

Description

Protective devices Technical Field

[0001] This application relates to the field of safety protection equipment technology, and in particular to a protective device. Background Technology

[0002] In the course of operations in fields such as construction, metallurgy, mining, power, oil refineries, chemicals, transportation, and forestry, it is usually necessary to wear appropriate safety protective equipment, such as safety helmets, to ensure personal safety.

[0003] As an important protective device for the head, safety helmets need to have a certain strength, and in special situations, they need to be used in conjunction with accessories such as mining lamps.

[0004] In related technologies, the connection between accessories such as mining lamps and safety helmets has problems such as weakening the strength of the helmet shell and limited connection firmness. Summary of the Invention

[0005] In view of this, embodiments of this application provide a protective device aimed at solving the problem in the related art that the connection between accessories such as mining lamps and safety helmets weakens the helmet shell strength and has limited connection firmness.

[0006] In a first aspect, embodiments of this application provide a protective device. The protective device includes a cap. At least one first connector is disposed on the exterior of the cap, the at least one first connector being integrally formed with the cap and having a reinforcing structure between them.

[0007] Alternatively or supplementally, at least one first connector includes at least one slot, and the reinforcing structure includes a reinforcing base, with at least one slot formed on the reinforcing base.

[0008] Alternatively or supplementarily, at least one card slot includes two first card slots and a second card slot, the second card slot being formed by the outer slot arms of the two first card slots and a connecting arm that connects them simultaneously. Further, the bottom of the connecting arm extends to the bottom of the first card slot and connects to the bottom of the first card slot and the reinforcing base.

[0009] Alternatively, the exterior of the cap shell may also be provided with at least one second connector integrally formed with the cap shell, and the at least one second connector is provided with a groove.

[0010] Alternatively or supplementally, at least one second connector includes a first snap-fit ​​member and a second snap-fit ​​member spaced apart. The first snap-fit ​​member and the second snap-fit ​​member each include a first snap-fit ​​arm and a second snap-fit ​​arm, and a snap-fit ​​space is formed between the first snap-fit ​​arm and the second snap-fit ​​arm. The first snap-fit ​​arm of the first connector and the second snap-fit ​​arm of the second connector are respectively provided with a sliding groove.

[0011] Alternatively or supplementally, at least one first connector is located on a first side of the outer shell, and at least one second connector is located on a second side of the outer shell.

[0012] Alternatively or supplementarily, the top of the cap shell is provided with an H-shaped reinforcing rib. The two side arms of the H-shaped reinforcing rib extend from the first side of the cap shell to the second side, and the middle arm of the H-shaped reinforcing rib connects the two side walls and is located at the top of the cap shell. The cap shell is injection molded, with the injection port located on the inner side of the cap shell.

[0013] Alternatively or supplementarily, at least one first connector is integrally injection molded with the cap shell; the cap shell is integrally injection molded with a marking having a draft angle α, and / or the cap shell has a parting line, the distance of the parting line from the edge of the inner surface of the cap shell being D, where D satisfies: 0.05mm≤D≤0.25mm.

[0014] Alternatively or supplementarily, the interior of the cap shell is provided with at least one fixing groove, the fixing groove and the shell of the cap shell are connected by an arc, the edge of the fixing groove is arc-shaped, and a first limiting part is provided in the fixing groove.

[0015] Alternatively or supplementarily, the above-mentioned protective device further includes a top strap, the end of which is provided with at least one fixing block, the at least one fixing block being provided in a corresponding manner with at least one fixing groove and being accommodated in at least one fixing groove, the at least one fixing block being provided with a second limiting part, the first limiting part and the second limiting part being detachably connected, the side of the at least one fixing block being arc-shaped; and / or, the end of the top strap is also provided with at least one third limiting part.

[0016] Alternatively or supplementarily, the aforementioned protective device further includes a headband with an adjustment structure comprising a first adjustment portion and a second adjustment portion located at opposite ends of the headband. The first adjustment portion has at least one positioning post, and the second adjustment portion has at least one positioning hole, with the at least one positioning hole detachably connected to the at least one positioning post. Adjusting the connection position between the at least one positioning hole and the at least one positioning post allows adjustment of the headband's enclosure size. Further, on the entry side of the second adjustment portion, the at least one positioning post has a first slope to facilitate the second adjustment portion sliding into the first adjustment portion.

[0017] Alternatively or supplementarily, the adjustment structure further includes an ejector structure disposed on the side of at least one positioning post on the first adjustment portion. The ejector structure includes a pressing portion and an ejector member, the ejector member protruding from the surface of the cap body. Pressing the ejector structure disengages at least one positioning hole from at least one positioning post. The height of the ejector member gradually decreases along the direction approaching the positioning post.

[0018] Alternatively or supplementally, the cap band is also provided with at least one fourth limiting part for detachable connection with the top band.

[0019] Alternatively or supplementarily, the aforementioned protective device further includes a chin strap, which comprises a fixing strap, a connecting strap, a first type of fastener, and a second type of fastener. The fixing strap and the connecting strap are connected to form the chin strap. Each end of the fixing strap is provided with an integrally formed buckle, and the buckle has at least one fifth limiting portion for detachable connection with a headband. The first type of fastener is integrally formed with the connecting strap, and the second type of fastener is movably mounted on the connecting strap for adjusting the length of the chin strap.

[0020] According to the technical solution of this application, the first connector is integrally formed with the cap shell, and the connection strength between the two is high. The first connector can snap and fix accessories such as lighting lamps and warning devices onto the cap shell, which is convenient to operate and relatively secure. Therefore, there is no need to drill holes and install screws on the cap shell, or fix accessories such as lighting lamps by means of straps, magnets, or adhesives, so as not to weaken the strength and impact resistance of the cap shell, or cause accessories to fall off due to weak magnetic force or adhesive strength, or slippage of the straps.

[0021] In addition, the reinforcing structure between the first connector and the cap can further improve the strength of the first connector, thereby improving the installation strength of the accessories on the cap. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the drawings only show some embodiments of this application and should not be considered as a limitation of the scope. It should also be understood that the same or similar reference numerals are used in the drawings to represent the same or similar elements. Furthermore, it should be understood that the drawings are merely schematic, and the dimensions and scale of the elements in the drawings are not necessarily precise.

[0023] Figure 1 is a schematic diagram of the explosion structure of a protective device according to an embodiment of this application.

[0024] Figure 2 is a schematic diagram of the structure of a protective device according to an embodiment of this application.

[0025] Figure 3 is a top view of the protective device in Figure 2.

[0026] Figure 4 is a schematic diagram of the protective device in Figure 2 from a bottom view.

[0027] Figure 5 is a schematic diagram of the right-side structure of the protective device in Figure 2.

[0028] Figure 6 is a magnified schematic diagram of a portion of region A in Figure 5.

[0029] Figure 7 is a magnified schematic diagram of the local structure of region B in Figure 5.

[0030] Figure 8 is another top view of the protective device according to one embodiment of this application.

[0031] Figure 9 is a schematic diagram of the top band structure according to an embodiment of this application.

[0032] Figure 10 is a schematic diagram of another top band structure according to an embodiment of this application.

[0033] Figure 11 is a schematic diagram of a headband structure according to an embodiment of this application.

[0034] Figure 12 is a schematic diagram of another headband structure according to an embodiment of this application.

[0035] Figure 13 is a magnified schematic diagram of the structure of region C in Figure 12.

[0036] Figure 14 is a schematic diagram of another headband structure according to an embodiment of this application.

[0037] Figure 15 is a magnified schematic diagram of the structure of region D in Figure 14.

[0038] Figure 16 is a schematic diagram of the structure of a chin band according to an embodiment of this application.

[0039] Reference numerals: 1000, Protective device; 10, Cap shell; 11, First connector; 11a, First slot; 11b, Second slot; 12, Second connector; 12a, First snap-fit; 12b, Second snap-fit; 121, First snap-fit ​​arm; 122, Second snap-fit ​​arm; 123, Slide groove; 124, Snap-fit ​​space; 13, Reinforcing structure; 131, Reinforcing base; 132, Connecting arm; 14, Injection port; 16, Fixing groove; 17, First limiting part; 18, H-shaped reinforcing rib; 181, Side arm; 182, Intermediate arm; 19, Marking; 20, Top strap; 21, Fixing block; 22, Second limiting part; 23, Third limiting part; 24, Top strap body; 25, Top strap arm; 26, Top strap vent; 27, Secondary arm; 30. Headband; 31. Adjustment structure; 311. First adjustment part; 3111. Positioning post; 312. Second adjustment part; 3121. Positioning hole; 313. Ejection structure; 3131. Ejection part; 3132. Pressing part; 314. Fourth limiting part; 40. Chin strap; 41. Fifth limiting part; 42. Fixing strap; 421. Buckle; 43. Connecting strap; 431. First connecting strap; 4311. First fastener; 4312. First mating buckle; 432. Second connecting strap; 4321. Second fastener; 4322. Second mating buckle; 4323. Adjusting buckle; 4324. Anti-disengagement buckle. Detailed Implementation

[0040] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0041] In fields such as construction, metallurgy, mining, power, oil refineries, chemicals, transportation, and forestry, protective equipment, such as safety helmets or hard hats, is usually required to ensure personal safety during operations.

[0042] As an important protective device for the head, safety helmets need to have a certain strength, and in special situations, such as places with low light, they usually need to be used in conjunction with accessories such as miners' lamps and warning devices. In related technologies, various accessories (such as miners' lamps and warning devices) are generally fixed to the safety helmet by means of screws, straps, magnets, or adhesives.

[0043] When using screws to secure components to a safety helmet, holes are typically drilled in the helmet shell. However, safety helmets used in industrial applications require high strength and impact resistance to protect the head. Therefore, drilling holes in safety helmets is generally not permitted to maintain their integrity and strength, thus preventing a reduction in the shell's strength and affecting its ability to absorb and disperse impact forces. Furthermore, screws are usually made of metal, which could potentially introduce new safety hazards.

[0044] When using magnetic or adhesive methods to secure accessories to a safety helmet, the magnetic or adhesive strength may be weak, or the helmet may come into contact with dust or corrosive substances, causing the accessories to fall off. When using straps to secure accessories, the smooth surface of the helmet makes the straps prone to slipping or even falling off, leading to the accessories shifting or falling off and disrupting operations.

[0045] In addition, other materials introduced for fixing accessories may accelerate the aging of the shell material and reduce its protective performance if the materials are not selected properly.

[0046] To address the aforementioned problems in the related technologies, referring to Figures 1 to 8, in a first aspect, embodiments of this application provide a protective device 1000. The protective device 1000 may include a cap 10. At least one first connector 11 may be provided on the exterior of the cap 10. The at least one first connector 11 may be integrally formed with the cap 10, for example, by injection molding, and a reinforcing structure 13 may be provided between the at least one first connector 11 and the cap 10.

[0047] In this way, the first connector 11 and the cap shell 10 are integrally formed, resulting in a high connection strength. The first connector 11 can snap and fix accessories such as lighting lamps and warning devices onto the cap shell 10, making operation convenient and the fixation relatively secure. Therefore, there is no need to drill holes and install screws on the cap shell 10, or to fix accessories such as lighting lamps by means of straps, magnets, or adhesives, thus not weakening the strength and impact resistance of the cap shell 10, or causing accessories to fall off due to weak magnetic or adhesive forces or slippage of the straps.

[0048] In addition, the reinforcing structure 13 provided between the first connector 11 and the cap 10 can further improve the strength of the first connector 11, thereby improving the installation strength of the accessories on the cap 10.

[0049] It is understandable that the first connector 11 and the cap 10 can also be integrally formed in other ways, such as by 3D printing.

[0050] Referring to Figures 2, 3 and 8, at least one first connector 11 may include at least one slot, and the reinforcing structure 13 may include a reinforcing base 13, on which at least one slot may be formed.

[0051] For example, at least one card slot may include two first card slots 11a and a second card slot 11b. The second card slot 11b is formed by the outer slot arms of the two first card slots 11a and a connecting arm 132 that connects them.

[0052] Thus, the first slot 11a can be used to fix accessories, such as the rotating structure of a lamp, and the second slot 11b can be used to fix the cap hook of a miner's lamp. Furthermore, the strength of the first slot 11a can be further increased by the connecting arm 132 that connects the first slot 11a and the second slot 11b.

[0053] It is understandable that other numbers of first slots 11a can be provided as needed, such as 1, 3, or 4. Alternatively, the first connector 11 can also be a locking block, in which case the corresponding accessory is provided with a slot.

[0054] For example, referring to Figure 2, the reinforcing base 13 can be two triangular-like reinforcing blocks formed on the cap shell 10, with the upper parts of the two reinforcing blocks being hollowed out to increase strength while reducing weight. Of course, the reinforcing blocks can also be non-hollowed out. It is understood that the reinforcing base 13 can also be configured with other structures and shapes as needed. For example, the reinforcing base 13 can be formed from a single integral reinforcing block with a hollowed-out upper part, which is not limited in this application.

[0055] For example, continuing to refer to FIG2, the two first slots 11a can be formed by the groove wall extending from the side of the reinforcing base 13 and the side of the reinforcing base 13, respectively, to simplify the structure. Of course, the first slots 11a can also be formed on the reinforcing base 13 in other ways.

[0056] For example, referring again to FIG2, the connecting arm 132 is a U-shaped member that connects to the outer wall of the first slot 11a, which can improve the strength of the first slot 11a through a simple structure. Of course, the connecting arm 132 can also be set to other shapes as needed, such as V-shaped or M-shaped.

[0057] Referring to Figure 2, the bottom of the connecting arm 132 can extend to the bottom of the first slot 11a and can be connected to the bottom of the first slot 11a and the reinforcing base 13 to further improve the strength of the first slot 11a.

[0058] In some embodiments, referring to Figures 1 to 3, 5 and 8, the exterior of the cap 10 may be provided with at least one second connector 12 integrally formed (e.g., integrally injection molded) with the cap 10.

[0059] In this way, accessories, such as cable ropes, can be fixed by the second connector 12, and accessories, such as the handle of a warning light, can be engaged in the groove 123 on the second connector 12. Moreover, the groove 123 on the second connector 12 simplifies and integrates the structure, making it easier to manufacture.

[0060] For example, at least one first connector 11 may be located on a first side outside the cap 10, and at least one second connector 12 may be located on a second side outside the cap 10.

[0061] Here, the first side can be opposite to the second side. For example, the first connector 11 is located on the front side of the helmet shell 10, and the second connector 12 is located on the rear side of the helmet shell 10. When the head strap is worn on the helmet, the two work together to prevent the head strap from slipping off. At least one of the second connectors 12 may be provided with a groove 123.

[0062] It is understood that at least one first connector 11 and at least one second connector 12 may also be disposed at other locations outside the cap 10 as needed.

[0063] For example, at least one second connector 12 may include a first snap-fit ​​member 12a and a second snap-fit ​​member 12b spaced apart, with grooves 123 respectively provided on the first snap-fit ​​member 12a and the second snap-fit ​​member 12b. Of course, other numbers of second snap-fit ​​members 12b may be provided as needed, such as one, three, or four. In addition, the second connector 12 may also be other connectors, such as riveting members.

[0064] For example, the first snap-fit ​​member 12a and the second snap-fit ​​member 12b may respectively include a first snap-fit ​​arm 121 and a second snap-fit ​​arm 122, and a snap-fit ​​space 124 is formed between the first snap-fit ​​arm 121 and the second snap-fit ​​arm 122. The first snap-fit ​​arm 121 of the first snap-fit ​​member 12a and the second snap-fit ​​arm 122 of the second snap-fit ​​member 12b may respectively be provided with a sliding groove 123 so that accessories such as warning lights can be mounted on the cap 10 through the sliding groove 123, and the structure is compact and saves space.

[0065] It is understandable that the groove 123 can also be set at other positions of the first card connector 12a and the second card connector 12b, for example, on the two card arms of the first card connector 12a, or on the two second card arms 122 or the two first card arms 121, or the groove 123 can be set on only one card arm.

[0066] In some embodiments, referring to Figures 1 to 5 and Figure 8, the top of the cap 10 may be provided with an H-shaped reinforcing rib 18. The two side arms 181 of the H-shaped reinforcing rib 18 extend from a first side to a second side of the cap 10, for example, from the front side to the rear side of the cap 10. The middle arm 182 of the H-shaped reinforcing rib 18 connects the two side walls and is located at the top of the cap 10.

[0067] In related technologies, a top rib is usually set at the top of the helmet shell to enhance its strength and help disperse and absorb impact forces. However, the top ribs are mostly single, triple, five, or "V" shaped, which are difficult to fully meet the requirements of high-strength protection. In addition, the shapes are relatively common and lack uniqueness, resulting in low market recognition.

[0068] In the above-described technical solution of this application, an H-shaped reinforcing rib 18 is provided at the top of the cap shell 10. The symmetrical structure of the reinforcing rib can more evenly improve the strength and impact resistance of the top of the cap shell 10, thereby improving the protection of the head. Moreover, the cap shell 10 is more aesthetically pleasing and has strong recognizability.

[0069] In some embodiments, referring to FIG4, the cap 10 may be integrally injection molded with at least one first connector 11, and the injection port 14 of the cap 10 is located on the inner side of the cap 10. In one example, the injection port 14 may be located in the area where the intermediate arm 182 of the H-shaped reinforcing rib 18 is located.

[0070] In related technologies, the injection molding mold for a helmet shell typically includes a fixed mold (as the cavity) and a moving mold (as the punch). During molding, the injection molding machine injects heated and molten plastic raw material into the mold through the injection port on the fixed mold. The outer surface of the helmet shell is formed on one side of the fixed mold, and the inner surface of the helmet shell is formed on the side of the moving mold. After molding and cooling, the moving mold and the helmet shell separate from the fixed mold, and the helmet shell is ejected from the moving mold. At the injection port, an injection port mark (also known as a sprue mark) is left on the helmet shell, which is generally formed at the top of the outer surface of the helmet shell. The weakest points of the injection-molded part are usually the weld line, the injection port, and the side opposite the injection port. Therefore, when workers wear safety helmets, the impact resistance of the top of the helmet shell is weakened.

[0071] During injection molding, the injection port 14 is the last part of the cap 10 to solidify, and its strength is relatively weaker than other areas. By setting the injection port 14 to be located on the inside of the cap 10, the weak parts of the cap 10 can be prevented from being directly impacted when the cap 10 is subjected to an impact, thereby improving the protection of the head.

[0072] In addition, the injection port 14 is located in the area where the middle arm 182 of the H-shaped reinforcing rib 18 is located, which can further prevent the cap 10 from being directly impacted by the weak part of the cap 10 when it is impacted.

[0073] In some embodiments, referring to Figures 5 and 6, the cap shell 10 is integrally injection molded with a mark 19 having a draft angle α.

[0074] In related technologies, logos, such as brand logos, are typically formed by direct injection molding or post-printing onto the helmet shell surface. However, printed logos are not wear-resistant and are prone to fading or peeling. Furthermore, poor printing quality can leave consumers with the impression that the brand is unprofessional or doesn't value its products, affecting the product's aesthetics and brand image. When forming a brand logo through integral injection molding with the helmet shell, it's crucial not to compromise the helmet shell's performance. Therefore, the brand logo usually protrudes a certain height from the shell surface. This can cause it to buckle during demolding, preventing smooth release. Forcing demolding can result in scratches and deformation of the helmet shell.

[0075] According to the above scheme, the logo 19, for example, the brand logo 19, can be integrally formed with the cap shell 10 to avoid the problem of the printed logo 19 being easily worn off.

[0076] In some embodiments, referring to Figures 5 and 7, the cap 10 can be integrally injection molded with at least one first connector 11. The distance between the parting line of the cap 10 and the edge of the inner surface of the cap 10 can be D, where D satisfies: 0.05mm ≤ D ≤ 0.25mm, for example, 0.08mm, 0.09mm, 0.1mm, 0.15mm, 0.18mm, or 0.2mm, etc.

[0077] In this article, the edge of the inner surface of the cap shell 10 can be understood as the boundary line between the outer surface and the inner surface of the cap shell 10 when viewed from above.

[0078] During the injection molding of the helmet shell, the reference line at the boundary between the moving mold and the fixed mold is called the parting line. Since it is inconvenient to set chamfers or rounded corners at the parting line, the brim of the safety helmet may be sharp or uneven if not properly finished, which will reduce the wearing comfort and protective performance of the safety helmet.

[0079] The parting line is spaced D away from the edge of the inner surface of the helmet shell 10, which can improve the wearing comfort and protective performance of the helmet. In addition, controlling the distance D within the above range can avoid the distance D being too small to achieve the corresponding effect, or too large to affect the appearance of the helmet shell 10.

[0080] During injection molding, the molten plastic experiences significant stress at sharp corners due to abrupt changes in its flow pattern, ultimately leading to residual stress at these corners. When subjected to impact or vibration, these corners are prone to cracking due to stress concentration. Furthermore, sharp corners increase the flow resistance of the molten plastic, making it difficult for the plastic to fill completely at these locations, resulting in defective products.

[0081] In some embodiments, referring to Figures 1 to 5 and Figure 8, the interior of the cap 10 may be provided with at least one fixing groove 16. The fixing groove 16 has an arc transition with the shell of the cap 10 to avoid incomplete filling and stress concentration during injection molding between the fixing groove 16 and the shell of the cap 10.

[0082] In one example, the edge of the fixing groove 16 is arc-shaped to further prevent the fixing groove 16 from being incompletely filled and stress concentration caused during injection molding between the housing of the cap 10 and the housing.

[0083] In one example, at least one retaining slot 16 is provided with a first limiting part 17, such as a locking block, a locking groove, or a hook, to facilitate detachable connection with the top strap 20. Exemplarily, at least one retaining slot 16 includes eight retaining slots 16. Of course, other numbers of retaining slots 16 can also be provided as needed, such as six, seven, nine, or ten, etc.

[0084] In one example, the cap shell 10 can simultaneously satisfy the requirement that at least one fixing groove 16 can be provided inside. The at least one fixing groove 16 has an arc transition with the shell of the cap shell 10, the edge of the fixing groove 16 is arc-shaped, and a first limiting part 17 is provided in the at least one fixing groove 16.

[0085] In some embodiments, referring to Figures 1, 9 and 10, the protective device 1000 may further include a top strap 20. The end of the top strap 20 is provided with at least one fixing block 21, and the at least one fixing block 21 is provided one-to-one and accommodated in at least one fixing groove 16, so as to replace the top strap 20 or the cap 10, improve the utilization rate of the product and facilitate maintenance.

[0086] For example, the top belt 20 may include a top belt body 24 and a plurality of top belt arms 25, for example, six top belt arms 25. Of course, the number of top belt arms 25 may also be set as needed. The fixing block 21 may be located at the end of the top belt arm 25, or on a secondary arm 27 provided at the end of the top belt arm 25. A plurality of top belt vent holes 26 may be provided on the top belt body 24.

[0087] In one example, the number of fixing blocks 21 can be 8 to ensure connection strength. Of course, the number of fixing blocks 21 can also be set to other numbers as needed, such as 4, 6, 7, 9 or 10, etc., in which case the number of fixing slots 16 needs to be adjusted accordingly.

[0088] Referring again to Figures 1, 9, and 10, at least one fixing block 21 may be provided with a second limiting part 22, and the first limiting part 17 may be detachably connected to the second limiting part 22. For example, the second limiting part 22 may be configured as a slot, a locking block, or a hook according to the first limiting part 17.

[0089] The top strap is the lining of a safety helmet that comes into direct contact with the wearer's head. Typically, the connection grooves between the helmet and the top strap are square, usually four or six. As mentioned above, during injection molding, the molten plastic experiences rapid changes in flow at sharp corners, generating significant stress. This results in residual stress at the corners after molding, which is prone to stress concentration and cracking under impact and vibration. Furthermore, sharp corners increase flow resistance, making it difficult to fill completely and leading to defective products.

[0090] In one example, at least one fixing block 21 has a curved side to facilitate shaping and avoid stress concentration.

[0091] In one example, at least one fixing block 21 can be provided with a second limiting part 22, the first limiting part 17 can be detachably connected to the second limiting part 22, and the side of at least one fixing block 21 is arc-shaped.

[0092] Referring to Figures 1, 9 and 10, the end of the top band 20 may also be provided with at least one third limiting part 23, such as a T-groove, so as to facilitate the detachable connection of the cap band 30 and prevent it from falling off.

[0093] It is understandable that the third limiting part 23 can also be other forms of groove, such as U-shaped, elliptical, circular, or gourd-shaped. Alternatively, the third limiting part 23 can also be a limiting block.

[0094] Referring to Figures 1 and 11 to 15, the protective device 1000 may further include a headband 30, on which an adjustment structure 31 may be provided. The adjustment structure 31 may include a first adjustment portion 311 and a second adjustment portion 312 located at opposite ends of the headband 30. The first adjustment portion 311 may be provided with at least one positioning post 3111, and the second adjustment portion 312 may be provided with at least one positioning hole 3121, the at least one positioning hole 3121 being detachably connected to the at least one positioning post 3111. On the entry side of the second adjustment portion 312, the at least one positioning post 3111 may have a first slope to facilitate the second adjustment portion 312 sliding into the first adjustment portion 311. In use, the connection position of the at least one positioning hole 3121 and the at least one positioning post 3111 is adjusted to adjust the enclosure size of the headband 30.

[0095] A headband is an adjustable band that surrounds the head to secure it. In many related technologies, headbands use gears for size adjustment, which increases the overall weight of the helmet and affects the wearer's comfort.

[0096] According to the above technical solution, the enclosure size of the cap 30 can be adjusted by adjusting the connection position between the positioning hole 3121 and the positioning post 3111. The adjustment structure 31 is relatively simple and will not increase the weight of the protective device 1000 excessively. Moreover, on the entry side of the second adjustment part 312, the positioning post 3111 has a first slope, which can easily slide the second adjustment part 312 into the first adjustment part 311.

[0097] For example, the first adjustment part 311 may also be provided with a constraint groove to constrain the tail of the second adjustment part 312.

[0098] For example, at least one positioning post 3111 may include multiple positioning posts 3111. The multiple positioning posts 3111 may be evenly distributed on the first adjusting portion 311. At least one positioning hole 3121 may include multiple positioning holes 3121. The multiple positioning holes 3121 may be evenly distributed on the second adjusting portion 312. Furthermore, at least one positioning post 3111 may be a single positioning post 3111, in which case at least one positioning hole 3121 may be multiple positioning holes 3121; or, at least one positioning post 3111 may be multiple positioning posts 3111, in which case at least one positioning hole 3121 may be a single positioning hole 3121.

[0099] Referring to Figures 11 to 15, the adjusting structure 31 may further include an ejector structure 313, which is disposed on the side of at least one positioning post 3111 on the first adjusting part 311. When the ejector structure 313 is pressed, at least one positioning hole 3121 can be disengaged from at least one positioning post 3111. In this way, the positioning hole 3121 can be disengaged from the positioning post 3111 simply by pressing the ejector structure 313, resulting in a relatively simple structure.

[0100] Referring again to Figures 11 to 15, the ejector structure 313 may include an ejector 3131 and a pressing part 3132. The ejector 3131 protrudes from the surface of the body of the cap 30. When the ejector structure 313 is pressed, at least one positioning hole 3121 can be disengaged from at least one positioning post 3111.

[0101] In one example, the height of the ejector 3131 can be gradually reduced along the direction close to the positioning post 3111 so that when adjusting the enclosure size of the cap 30, the ejector 3131 gradually enters between the first adjustment part 311 and the second adjustment part 312 and separates the positioning hole 3121 from the positioning post 3111, reducing the resistance and difficulty of adjustment.

[0102] Referring again to Figures 11 to 15, the ejector structure 313 may include a first ejector structure 313 and a second ejector structure 313 located on both sides of at least one positioning post 3111, which can apply pressure from both sides simultaneously, making it easier to adjust the enclosure size of the cap 30.

[0103] Referring to Figures 11 to 14, the cap band 30 may also be provided with at least one fourth limiting part 314, which is used for detachable connection with the top band 20. For example, the fourth limiting part 314 can be a T-shaped post, making the connection less likely to detach. Of course, the fourth limiting part 314 can also be set in other shapes, such as a cylinder, an elliptical cylinder, or a gourd-shaped post, etc. Correspondingly, the shape of the connection part on the top band 20 needs to be adjusted, such as the shape of the third limiting part 23. In addition, the fourth limiting part 314 can also be a T-shaped groove or a groove of other shapes, and correspondingly, the third limiting part 23 can be a T-shaped post or a post of other shapes.

[0104] In some embodiments, referring to Figures 1 and 16, the protective device 1000 may further include a chin strap 40. The chin strap 40 may be provided with at least one fifth limiting portion 41 for detachable connection with the headband 30.

[0105] In one example, the fifth limiting part 41 can be a limiting groove. The limiting groove can be a T-shaped limiting groove, which can better prevent the connection part from slipping off. Of course, the limiting groove can also be other shapes, such as circular, elliptical, square, or gourd-shaped, etc. Correspondingly, the shape of the connection part on the cap 30 will also change. For example, the fourth limiting part 314 on the cap 30 will change accordingly. The fifth limiting part 41 can also be a limiting block. In this case, the fourth limiting part 314 will be a limiting groove.

[0106] In this way, the chin strap 40 can be detachably mounted on the cap shell 10, making it easy to replace and repair.

[0107] Referring to Figure 16, the chin strap 40 may include at least one fixing strap 42 and at least one connecting strap 43, a first type of fastener, and a second type of fastener. Each end of the fixing strap 42 may be provided with a buckle 421, and the buckle 421 may be provided with a fifth limiting part 41. The buckle 421 may be integrally formed with the fixing strap 42. At least one fixing strap 42 and at least one connecting strap 43 are connected to form the chin strap 40. The first type of fastener may be integrally formed with the fixing strap 42 or the connecting strap 43, and the second type of fastener may be movably disposed on the connecting strap 43 for adjusting the length of the chin strap 40.

[0108] Referring again to Figure 16, at least one securing strap 42 may include two securing straps 42, and at least one connecting strap 43 may include a first connecting strap 431 and a second connecting strap 432. The two securing straps 42 are respectively connected to the first connecting strap 431 and the second connecting strap 432. The first connecting strap 431 may be provided with a first fastener 4311, and the second connecting strap 432 may be provided with a second fastener 4321. The first fastener 4311 can be fastened to the second fastener 4321 to facilitate putting on and taking off the helmet.

[0109] Referring to Figure 16, the second connecting strap 432 may be equipped with an adjusting buckle 4323 to adjust the length of the chin strap 40. Of course, the adjusting buckle 4323 may also be provided on the first connecting strap 431 or the fixing strap 42.

[0110] Referring to Figure 16, the first connecting strap 431 and the second connecting strap 432 are respectively provided with a first pair of buckles 4312 and a second pair of buckles 4322 at the connection ends with the two fixing straps 42.

[0111] For example, the first fastener 4311 can be a socket (e.g., a female fastener), and the second fastener 4321 can be a plug (e.g., a male fastener). Of course, the two can also be interchanged.

[0112] Referring to Figure 16, the first pair of snap fasteners 4312 and the first fastener 4311 can be integrally formed with the first connecting strip 431.

[0113] The first type of fastener may include at least one of the second pair of snap fasteners 4322 and the anti-derailment buckle 4324. In one example, the second pair of snap fasteners 4322 and the anti-derailment buckle 4324 may be integrally formed with the second connecting strap 432.

[0114] In one example, buckle 421 is integrally formed with retaining strap 42.

[0115] In one example, the first pair of snap fasteners 4312 and the first fastener 4311 can be integrally formed with the first connecting strap 431, the second pair of snap fasteners 4322 and the anti-disengagement buckle 4324 can be integrally formed with the second connecting strap 432, and the buckle 421 can be integrally formed with the fixing strap 42.

[0116] The chin strap is an adjustable accessory that provides auxiliary fixation, attached to the chin to help maintain the helmet's position and orientation. In related technologies, the various buckles and clips of the chin strap are generally connected by sewn fasteners. However, the strength of sewn connections is relatively low, and there are many loose threads. The threads may wear and break under prolonged use or significant external force, causing the strap to separate from the clips. Furthermore, the sewing process is cumbersome, requiring additional sewing materials and even manual labor, which not only increases production costs but also reduces production efficiency.

[0117] In this application, the first pair of snap fasteners 4312 and the first fastener 4311 can be integrally formed with the first connecting belt 431, the second pair of snap fasteners 4322 and the anti-disengagement buckle 4324 can be integrally formed with the second connecting belt 432, and the buckle 421 and the fixing belt 42 are integrally formed, which facilitates automated forming, has relatively low production efficiency and cost, and has high overall strength and is not easily damaged.

[0118] Below, in order to better understand the technical solution of this application, taking the protective device 1000 as a safety helmet as an example, and referring to Figures 1 to 16, the technical solution and usage process of this application will be further explained in detail.

[0119] Referring to Figures 1 to 16, the protective device 1000 provided in the embodiments of this application, such as a safety helmet, may include a helmet shell 10, a top strap 20, a headband 30, and a chin strap 40.

[0120] The front side of the outer shell 10 may be provided with a first slot 11a and a second slot 11b. The first slot 11a and the second slot 11b are disposed on a reinforcing base 13, which is a triangular base with an open upper part. The first slot 11a may be formed by the groove wall extending from the side of the reinforcing base 13 and the side of the reinforcing base 13. A U-shaped connecting arm 132 may be connected to the outer groove wall of the first slot 11a. The bottom of the connecting arm 132 may extend to the bottom of the first slot 11a and may be connected to the bottom of the first slot 11a and the reinforcing base 13.

[0121] Two snap-fit ​​elements can be provided on the rear side of the outer shell 10. Each snap-fit ​​element can include a first snap-fit ​​arm 121 and a second snap-fit ​​arm 122, forming a snap-fit ​​space 124 between them. A sliding groove 123 can be provided on the first snap-fit ​​arm 121 of one second snap-fit ​​element 12b and the second snap-fit ​​arm 122 of the other second snap-fit ​​element 12b, so that accessories such as warning lights can be mounted on the shell 10 via the sliding groove 123.

[0122] The top of the cap shell 10 may be provided with an H-shaped reinforcing rib 18. The two side arms 181 of the H-shaped reinforcing rib 18 extend from the front side of the cap shell 10 to the rear. The middle arm 182 of the H-shaped reinforcing rib 18 connects the two side walls and is located at the top of the cap shell 10.

[0123] The interior of the cap shell 10 can be provided with eight fixing slots 16. The fixing slots 16 are connected to the shell of the cap shell 10 by a rounded transition, and the edges of the fixing slots 16 are arc-shaped. The fixing slots 16 are provided with locking blocks inside.

[0124] The cap shell 10 is integrally injection molded with the first slot 11a, the second slot 11b, and the two snap-fit ​​parts. The injection port 14 of the cap shell 10 is located on the inner side of the cap shell 10 and in the area where the middle arm 182 of the H-shaped reinforcing rib 18 is located. The cap shell 10 is integrally injection molded with a mark 19, which has a draft angle.

[0125] The distance between the parting line of the cap shell 10 and the edge of the inner surface of the cap shell 10 can be D, where D satisfies: 0.05mm≤D≤0.25mm.

[0126] In use, the first slot 11a can be used to secure accessories, such as the rotating structure of a lamp, and the second slot 11b can be used to secure the cap hook of a miner's lamp. The snap-fit ​​component can secure accessories, such as cable ropes, and can also hold accessories, such as the handle of a warning light, onto the slide 123. When setting up the head rope, the slots and snap-fit ​​components work together to prevent the head rope from slipping.

[0127] The top strap 20 may include a square top strap body 24 and six top strap arms 25. Multiple ventilation holes may be provided on the top strap body 24. A fixing block 21 may be located at the end of a top strap arm 25, or on a secondary arm 27 located at the end of a top strap arm 25. The sides of the fixing block 21 are arc-shaped. The fixing block 21 may be disposed in a fixing groove 16. A locking slot may be provided on the fixing block 21, which can be detachably connected to a locking block in the fixing groove 16 to achieve a detachable connection between the top strap 20 and the cap shell 10.

[0128] When installing the safety helmet, the fixing block 21 is accommodated in the fixing groove 16, and the groove and the fixing block engage to connect the top strap 20 to the helmet shell 10.

[0129] The top band 20 may also have 6 T-slots at its end for connecting the headband 30.

[0130] An adjustment structure 31 may be provided on the cap band 30. The adjustment structure 31 may include a first adjustment part 311, a second adjustment part 312, and an ejection structure 313. The first adjustment part 311 is located at the first end of the cap band 30, and the second adjustment part 312 is located at the second end of the cap band 30. A plurality of positioning posts 3111 may be evenly provided on the first adjustment part 311, and a plurality of positioning holes 3121 may be evenly and correspondingly provided on the second adjustment part 312. The positioning holes 3121 are detachably connected to the positioning posts 3111. On the entry side of the second adjustment part 312, the positioning posts 3111 may have a first slope to facilitate the second adjustment part 312 sliding into the first adjustment part 311. A constraint groove may also be provided on the side of the first adjustment part 311 away from the second adjustment part 312 to constrain the tail of the second adjustment part 312.

[0131] An ejector structure 313 is disposed on the first adjusting part 311. The ejector structure 313 may include a base plate, an ejector member 3131 disposed on the base plate, and a pressing part 3132, wherein the ejector member 3131 protrudes from the surface of the base plate. The height of the ejector member 3131 may gradually decrease along the direction close to the positioning post 3111. The ejector structure 313 may include a first ejector structure 313 and a second ejector structure 313 respectively located on both sides of at least one positioning post 3111.

[0132] In use, the positioning hole 3121 on the second adjusting part 312 engages with the positioning post 3111 on the first adjusting part 311, and the tail of the second adjusting part 312 passes through the constraint groove. When it is necessary to adjust the enclosure size of the cap 30, press the first ejector structure 313 and the second ejector structure 313 on both sides of the positioning post 3111, so that the ejector 3131 gradually enters between the first adjusting part 311 and the second adjusting part 312, so as to separate the positioning hole 3121 from the positioning post 3111 and adjust the enclosure size of the cap 30 to a suitable range.

[0133] The headband 30 can also be provided with 10 T-shaped posts, of which 6 T-shaped posts are connected to the T-shaped grooves on the top band 20 at the corresponding positions, and the remaining 4 are used to connect to the chin band 40.

[0134] In use, the cap band 30 is connected to the T-shaped hole on the top band 20 via the T-shaped post.

[0135] The chin strap 40 may include two fixing straps 42, a first connecting strap 431, and a second connecting strap 432. Each of the two fixing straps 42 may have a buckle 421 at both ends, and the buckle 421 may have a T-shaped groove for detachable connection with a T-shaped post on the headband 30. The two fixing straps 42 are respectively connected to the first connecting strap 431 and the second connecting strap 432.

[0136] One end of the first connecting strap 431 may be provided with a socket, and one end of the second connecting strap 432 may be provided with a plug. The socket (e.g., a female buckle) can be engaged with the plug (e.g., a male buckle) to facilitate putting on and taking off the safety helmet.

[0137] The second connecting strap 432 may be provided with an adjusting buckle 4323 to adjust the length of the chin strap 40. The connecting ends of the first connecting strap 431 and the second connecting strap 432 to the two fixing straps 42 are respectively provided with a first pair of fastening buckles 4312 and a second pair of fastening buckles 4322.

[0138] The first pair of snap fasteners 4312 and the first fastener 4311 can be integrally formed with the first connecting strap 431, the second pair of snap fasteners 4322 and the anti-disengagement buckle 4324 can be integrally formed with the second connecting strap 432, and the buckle 421 and the fixing strap 42 are integrally formed.

[0139] In use, the two securing straps 42 are connected to the T-posts on the helmet band 30 via T-slots. The first connecting strap 431 and the second connecting strap 432 are respectively connected to the two securing straps 42. The length of the second connecting strap 432 can be adjusted by adjusting the buckle 4323 to match the chin strap 40 to the body shape of different helmet users. The anti-disengagement buckle 4324 prevents the adjustable part of the connecting strap 43 from coming undone during adjustment. By connecting and disconnecting the socket and the plug, the two parts of the chin strap 40 can be connected to put on the helmet or separated to remove the helmet.

[0140] In this application, the cap shell 10, top strap 20, cap band 30 and chin strap 40 are detachably connected, which facilitates the replacement of parts for maintenance and saves costs.

[0141] In this application, the protective device 1000 can be a safety helmet or helmet, etc.

[0142] It should be noted that, as needed, all or part of the above embodiments can be combined. For example, one embodiment can be combined with one or more other embodiments to form a new embodiment, or a part of one embodiment can be combined with one or more other embodiments to form a new embodiment, or a part of one embodiment can be combined with parts of one or more other embodiments to form a new embodiment, or some technical features of some embodiments can be omitted to form a new embodiment.

[0143] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0144] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0145] It should be understood that the term "comprising" and its variations as used in this application are open-ended, meaning "including but not limited to". The term "according to" means "at least in part according to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least another embodiment".

[0146] It should be understood that although terms such as "first" or "second" may be used in this application to describe various elements (such as a first protrusion and a second protrusion), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0147] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0148] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Similarly, "abutment" can refer to a direct abutment or an indirect abutment through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0149] The scope of protection of this application is not limited to the above embodiments. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A protective device, characterized in that, include: The cap shell has at least one first connector on its exterior. The at least one first connector is integrally formed with the cap shell and a reinforcing structure is provided between them.

2. The protective device according to claim 1, characterized in that, The at least one first connector includes at least one slot, and the reinforcing structure includes a reinforcing base, wherein the at least one slot is formed on the reinforcing base.

3. The guard of claim 2, wherein, The at least one card slot includes two first card slots and a second card slot, the second card slot being formed by the outer slot arms of the two first card slots and a connecting arm that connects them simultaneously; the bottom of the connecting arm extends to the bottom of the first card slot and is connected to the bottom of the first card slot and the reinforcing base.

4. The guard of any one of claims 1 to 3, wherein, The outer surface of the cap shell is also provided with at least one second connector integrally formed with the cap shell, and the at least one second connector is provided with a sliding groove.

5. The guard of claim 4, wherein, The at least one second connector includes a first snap-fit ​​member and a second snap-fit ​​member spaced apart. The first snap-fit ​​member and the second snap-fit ​​member each include a first snap-fit ​​arm and a second snap-fit ​​arm, and a snap-fit ​​space is formed between the first snap-fit ​​arm and the second snap-fit ​​arm. The first snap-fit ​​arm of the first snap-fit ​​member and the second snap-fit ​​arm of the second snap-fit ​​member are respectively provided with the sliding groove.

6. Guard according to claim 4 or 5, characterized in that The at least one first connector is located on a first side outside the cap shell, and the at least one second connector is located on a second side outside the cap shell.

7. The guard of any one of claims 1 to 5, wherein, The top of the cap shell is provided with an H-shaped reinforcing rib, the two side arms of the H-shaped reinforcing rib extend from the first side to the second side of the cap shell, the middle arm of the H-shaped reinforcing rib connects the two side walls and is located at the top of the cap shell, the cap shell is injection molded, and the injection port of the cap shell is located on the inner side of the cap shell.

8. The guard of any one of claims 1 to 6, wherein, The at least one first connector is integrally injection molded with the cap shell; the cap shell is integrally injection molded with a marking, the marking having a draft angle, and / or The cap shell has a parting line, and the distance between the parting line and the edge of the inner surface of the cap shell is D, where D satisfies: 0.05mm≤D≤0.25mm.

9. The guard of any one of claims 1 to 8, wherein, The interior of the cap shell is provided with at least one fixing groove, and the at least one fixing groove is connected to the shell of the cap shell by an arc transition. The edge of the fixing groove is arc-shaped, and a first limiting part is provided in the at least one fixing groove.

10. The guard of claim 9, wherein, It also includes a top strap, the end of which is provided with at least one fixing block. The at least one fixing block is correspondingly disposed in one-to-one with the at least one fixing groove. The at least one fixing block is provided with a second limiting portion. The first limiting portion and the second limiting portion are detachably connected. The side of the at least one fixing block is arc-shaped; and / or The top band is also provided with at least one third limiting part at its end.

11. The guard of claims 1-10, wherein, It also includes a headband, which is provided with an adjustment structure. The adjustment structure includes a first adjustment part and a second adjustment part located at both ends of the headband. The first adjustment part is provided with at least one positioning post, and the second adjustment part is provided with at least one positioning hole. The at least one positioning hole is detachably connected to the at least one positioning post. Adjusting the connection position of the at least one positioning hole and the at least one positioning post can adjust the enclosure size of the headband. On the entry side of the second adjustment section, at least one positioning post has a first slope to facilitate the second adjustment section sliding into the first adjustment section.

12. The guard of claim 11, wherein, The adjustment structure further includes an ejector structure, which is disposed on the side of the at least one positioning post on the first adjustment part. The ejector structure includes an ejector member and a pressing part. The ejector member protrudes from the surface of the body of the cap. When the ejector structure is pressed, the at least one positioning hole can be disengaged from the at least one positioning post. The height of the ejector member gradually decreases along the direction close to the positioning post.

13. The guard of claim 11 or 12, wherein, The cap band is also provided with at least one fourth limiting part, which is used to detachably connect with the top strap.

14. The guard of any one of claims 1 to 13, wherein, It also includes the chin band, which comprises: A fixing strap and a connecting strap are connected to form the chin strap. Each end of the fixing strap has an integrally formed buckle, and each buckle has at least one fifth limiting part for detachable connection with the headband. The first type of fastener is integrally formed with the connecting belt, and the second type of fastener is movably disposed on the connecting belt for adjusting the length of the chin strap.

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