Protective device

Abstract

The invention provides a protection device. The protective device comprises a helmet shell. At least one first connecting piece is arranged outside the helmet shell, the at least one first connecting piece and the helmet shell are integrally formed, and a reinforcing structure is arranged between the at least one first connecting piece and the helmet shell. According to the technical scheme, the first connecting piece and the helmet shell are integrally formed, the connecting strength of the first connecting piece and the helmet shell is high, the first connecting piece can clamp and fix accessories such as a lighting lamp or warning equipment to the helmet shell, and fixation is firm. In addition, the strength of the first connecting piece can be further improved through the reinforcing structure arranged between the first connecting piece and the helmet shell, and then the installation strength of accessories on the helmet shell is improved. In addition, the H-shaped reinforcing ribs on the helmet shell are high in identifiability, and the strength is effectively improved. The injection molding opening of the helmet shell is located on the inner side of the helmet shell, and influences on strength are reduced. The arc-shaped structures of the fixing grooves in the helmet shell and the fixing blocks of the top belt are convenient to form. The adjusting structure of the cap hoop is simple and easy to adjust, the chin strap and part of accessories are integrally formed, and the manufacturing process is simplified.

Description

Technical Field

[0001] This application relates to the technical field of safety protection equipment, and particularly to a protection device. Background Art

[0002] During the operation in fields such as construction, metallurgy, mining, electric power, oil factories, chemical industry, transportation, and forestry, it is usually necessary to wear corresponding safety protection equipment, such as safety helmets, to ensure personal safety.

[0003] As an important protection equipment for the head, a safety helmet needs to have a certain strength, and in special occasions, it needs to be used in cooperation with accessories such as miner's lamps.

[0004] In related technologies, there are problems such as weakening the strength of the helmet shell of the safety helmet and limited connection firmness in the connection between accessories such as miner's lamps and the safety helmet. Summary of the Invention

[0005] In view of this, embodiments of the present application provide a protection device, aiming to solve the problems of weakening the strength of the helmet shell of the safety helmet and limited connection firmness in the connection between accessories such as miner's lamps and the safety helmet in related technologies.

[0006] In a first aspect, embodiments of the present application provide a protection device. The protection device includes a helmet shell. At least one first connecting member is arranged on the outer part of the helmet shell. At least one first connecting member is integrally formed with the helmet shell, and a strengthening structure is arranged between at least one first connecting member and the helmet shell.

[0007] Supplementally or alternatively, at least one first connecting member includes at least one clamping groove, and the strengthening structure includes a strengthening base, and at least one clamping groove is formed on the strengthening base.

[0008] Supplementally or alternatively, at least one clamping groove includes two first clamping grooves and a second clamping groove, and the second clamping groove is formed by the outer groove arms of the two first clamping grooves and a connecting arm connecting them at the same time. The bottom of the connecting arm extends to the bottoms of the first clamping groove and the second clamping groove, and is connected to the bottoms of the first clamping groove, the second clamping groove, and the strengthening base.

[0009] Supplementally or alternatively, at least one second connecting member integrally formed with the helmet shell is further arranged on the outer part of the helmet shell, and a sliding groove is arranged on at least one second connecting member.

[0010] Supplementary or alternatively, at least one second connecting member includes a first clamping member and a second clamping member arranged at intervals. The first clamping member and the second clamping member respectively include a first clamping arm and a second clamping arm. A clamping space is formed between the first clamping arm and the second clamping arm. Chute grooves are respectively arranged on the first clamping arm of the first clamping member and the second clamping arm of the second clamping member; and / or, at least one first connecting member is located on the first side outside the cap shell, and at least one second connecting member is located on the second side outside the cap shell.

[0011] Supplementary or alternatively, an H-shaped reinforcing rib is arranged on the top of the cap shell. 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 inside the cap shell.

[0012] Supplementary or alternatively, an identification mark is integrally injection molded on the cap shell. The identification mark has a demolding slope α, and / or the distance between the parting line of the cap shell and the edge of the inner surface of the cap shell is D, and D satisfies: 0.05 mm ≤ D ≤ 0.25 mm.

[0013] Supplementary or alternatively, at least one fixing groove is arranged inside the cap shell. The at least one fixing groove has an arc transition with the shell of the cap shell. The edge of the fixing groove is arc-shaped, and at least one first limiting portion is arranged in the at least one fixing groove.

[0014] Supplementary or alternatively, the above-mentioned protective device further includes a headband. At least one fixing block is arranged at the end of the headband. The at least one fixing block is arranged corresponding to the at least one fixing groove one by one and is accommodated in the at least one fixing groove. At least one second limiting portion is arranged on the at least one fixing block. The first limiting portion is detachably connected to the second limiting portion. The side surface of the at least one fixing block is arc-shaped; and / or, at least one third limiting portion is further arranged at the end of the headband.

[0015] Supplementary or alternatively, the above-mentioned protective device further includes a cap band. An adjusting structure is arranged on the cap band. The adjusting structure includes a first adjusting portion and a second adjusting portion respectively located at both ends of the cap band. At least one positioning post is arranged on the first adjusting portion, and at least one positioning hole is arranged on the second adjusting portion. The at least one positioning hole is detachably connected to the at least one positioning post. On the entering side of the second adjusting portion, the at least one positioning post has a first slope to facilitate the second adjusting portion to slide into the first adjusting portion. Adjusting the connection position between the at least one positioning hole and the at least one positioning post can adjust the enclosing size of the cap band.

[0016] Supplementary or alternatively, the adjusting structure further includes an ejection structure, which is disposed on the side of at least one positioning post of the first adjusting portion. The ejection structure includes a pressing portion and an ejecting member, and the ejecting member protrudes from the surface of the main body of the cap hoop. Pressing the ejection structure can disengage at least one positioning hole from at least one positioning post. The height of the ejecting member gradually decreases in the direction close to the positioning post.

[0017] Supplementary or alternatively, at least one fourth limiting portion is further provided on the cap hoop, and the fourth limiting portion is used for detachably connecting with the top band.

[0018] Supplementary or alternatively, the above-mentioned protective device further includes a chin strap, which includes 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. Belt buckles are integrally formed at both ends of the fixing strap, and at least one fifth limiting portion is provided on the belt buckle, and the at least one fifth limiting portion is used for detachably connecting with the cap hoop. The first type of fastener is integrally formed with the connecting strap, and the second type of fastener is movably disposed on the connecting strap for adjusting the length of the chin strap.

[0019] According to the technical solution of the present application, the first connecting member is integrally formed with the cap shell, and the connection strength between the two is relatively high. The first connecting member can snap and fix accessories such as lighting lamps and warning devices on the cap shell, which is convenient to operate and firmly fixed. Therefore, there is no need to drill holes in the cap shell to set screws, or fix and connect accessories such as lighting lamps by means of straps, magnetic attraction or adhesives, etc., so that the strength and anti-impact ability of the cap shell will not be weakened, or the accessories will fall off due to insufficient magnetic force or bonding ability or slipping of the binding.

[0020] In addition, the strengthening structure provided between the first connecting member and the cap shell can further improve the strength of the first connecting member, and further improve the installation strength of the accessories on the cap shell. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the drawings only show some embodiments of the present application and should not be regarded as limiting the scope. It should also be understood that the same or similar reference numerals are used to represent the same or similar elements in the drawings. It should also be understood that the drawings are only schematic, and the dimensions and proportions of the elements in the drawings are not necessarily accurate.

[0022] Figure 1 It is an exploded structural schematic diagram of a protective device according to an embodiment of the present application.

[0023] Figure 2 It is a structural schematic diagram of a protective device according to an embodiment of the present application.

[0024] Figure 3 For Figure 2Top view structural schematic diagram of the middle protective device.

[0025] Figure 4 is Figure 2 Bottom view structural schematic diagram of the protective device in

[0026] Figure 5 is Figure 2 Right view structural schematic diagram of the protective device in

[0027] Figure 6 is Figure 5 Partial enlarged structural schematic diagram of area A in

[0028] Figure 7 is Figure 5 Partial enlarged structural schematic diagram of area B in

[0029] Figure 8 Another top view structural schematic diagram of the protective device according to an embodiment of the present application.

[0030] Figure 9 Top belt structural schematic diagram according to an embodiment of the present application.

[0031] Figure 10 Another top belt structural schematic diagram according to an embodiment of the present application.

[0032] Figure 11 Headband structural schematic diagram according to an embodiment of the present application.

[0033] Figure 12 Another headband structural schematic diagram according to an embodiment of the present application.

[0034] Figure 13 is Figure 12 Partial enlarged structural schematic diagram of area C in

[0035] Figure 14 Another headband structural schematic diagram according to an embodiment of the present application.

[0036] Figure 15 is Figure 14 Partial enlarged structural schematic diagram of area D in

[0037] Figure 16 Chin strap structural schematic diagram according to an embodiment of the present application.

[0038] Reference numerals: 1000, protective device; 10. Cap shell; 11. First connecting member; 11a. First card slot; 11b. Second card slot; 12. Second connecting member; 12a. First clamping member; 12b. Second clamping member; 121. First clamping arm; 122. Second clamping arm; 123. Slide groove; 124. Clamping space; 13. Reinforcing structure; 131. Reinforcing base; 132. Connecting arm; 14. Injection port; 16. Fixed groove; 17. First limiting portion; 18. H-shaped reinforcing rib; 181. Side arm; 182. Intermediate arm; 19. Marking; 20. Top band; 21. Fixed block; 22. Second limiting portion; 23. Third limiting portion; 24. Top band body; 25. Top band arm; 26. Top band ventilation hole; 27. Secondary arm; 30. Cap brim; 31. Adjusting structure; 311. First adjusting portion; 3111. Positioning post; 312. Second adjusting portion; 3121. Positioning hole; 313. Ejecting structure; 3131. Ejecting member; 3132. Pressing portion; 314. Fourth limiting portion; 40. Chin strap; 41. Fifth limiting portion; 42. Fixed 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-detachment buckle. Specific embodiments

[0039] The following further describes the embodiments of the present application in detail in conjunction with the drawings and examples. The detailed descriptions and drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms, not limited to the specific embodiments disclosed in the text, but including all technical solutions falling within the scope of the claims.

[0040] In fields such as construction, metallurgy, mining, power, oil factories, chemical industry, transportation, and forestry, during operations, in order to ensure personal safety, it is usually necessary to wear protective devices, such as safety helmets or helmets.

[0041] As an important protective device for the head, a safety helmet needs to have a certain strength, and in special occasions, such as places with weak light, it is usually necessary to cooperate with accessories such as miner's lamps and warning devices. In the related art, various accessories (such as miner's lamps and warning devices) are generally fixed to the safety helmet by means of screwing, straps, magnetic attraction, or adhesives.

[0042] When fixing accessories on a safety helmet by screwing, it is usually necessary to drill holes in the helmet shell. However, safety helmets used in the industrial field need to have high strength and impact resistance to protect the head. Therefore, generally, drilling holes in the safety helmet is not allowed to maintain the integrity and strength of the safety helmet, thereby avoiding reducing the strength of the helmet shell due to drilling and affecting its ability to absorb and disperse impact force. Moreover, the screws are usually made of metal, which may introduce new safety hazards.

[0043] When fixing accessories on a safety helmet by magnetic attraction or adhesive, when the magnetic force or bonding ability is not strong, or when encountering dust and corrosive substances, it is easy to cause the accessories to fall off due to unstable adsorption. When fixing accessories on a safety helmet by a strap, due to the smooth surface of the safety helmet, the strap is easy to slide or even fall off, resulting in the displacement or falling off of the accessories and affecting the operation.

[0044] In addition, other materials introduced due to fixing accessories may accelerate the aging of the helmet shell material and reduce its protection performance when the material selection is inappropriate.

[0045] To solve the above problems existing in the related technology, referring to Figures 1 to 8 , on the first hand, an embodiment of the present application provides a protection device 1000. The protection device 1000 may include a helmet shell 10. At least one first connecting member 11 may be disposed on the outside of the helmet shell 10. At least one first connecting member 11 may be integrally formed with the helmet shell 10. For example, integrally injection molded, and a strengthening structure 13 may be disposed between at least one first connecting member 11 and the helmet shell 10.

[0046] In this way, the first connecting member 11 and the helmet shell 10 are integrally formed, and the connection strength between the two is relatively high. The first connecting member 11 can snap and fix accessories such as lighting lamps and warning devices on the helmet shell 10, which is convenient to operate and firmly fixed. Therefore, there is no need to drill holes in the helmet shell 10 to set screws, or fix and connect accessories such as lighting lamps by straps, magnetic attraction or adhesives, so as not to weaken the strength and impact resistance of the helmet shell 10, or cause the accessories to fall off due to insufficient magnetic force or bonding ability or slipping of the binding.

[0047] In addition, the strengthening structure 13 disposed between the first connecting member 11 and the helmet shell 10 can further improve the strength of the first connecting member 11, and further improve the installation strength of the accessories on the helmet shell 10.

[0048] It can be understood that the first connecting member 11 and the helmet shell 10 can also be integrally formed by other means, for example, integrally formed by 3D printing.

[0049] Referring to Figure 2 、 Figure 3 and Figure 8, at least one first connecting member 11 may include at least one card slot, the reinforcing structure 13 may include a reinforcing base 13, and at least one card slot may be formed on the reinforcing base 13.

[0050] 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 simultaneously.

[0051] In this way, the first card slot 11a can be used to fix accessories. For example, it can fix the rotating structure of a lamp. The second card slot 11b can be used to fix the cap hook of a miner's lamp. In addition, the strength of the first card slot 11a can be further improved by the connecting arm 132 that connects the first card slot 11a and the second card slot 11b.

[0052] It can be understood that other numbers of first card slots 11a can also be set as needed, such as 1, 3, or 4, etc. In addition, the first connecting member 11 can also be a clamping block, and at this time, a card slot is provided on the corresponding accessory.

[0053] Exemplarily, referring to Figure 2 , the reinforcing base 13 can be two triangular-like reinforcing blocks formed on the cap shell 10. The upper parts of the two reinforcing blocks are hollowed out to reduce weight while improving strength. Of course, the reinforcing blocks can also not be hollowed out. It can be understood that the reinforcing base 13 can also be set as other structures and shapes as needed. For example, the reinforcing base 13 is formed by a single integral reinforcing block with a hollowed-out upper part. The present application does not limit this.

[0054] Exemplarily, continuing to refer to Figure 2 , the two first card slots 11a can be respectively formed by enclosing the slot walls extending from the side surfaces of the reinforcing base 13 and the side surfaces of the reinforcing base 13, so as to simplify the structure. Of course, the first card slot 11a can also be formed on the reinforcing base 13 in other ways.

[0055] Exemplarily, then referring to Figure 2 , the connecting arm 132 is a U-shaped member that connects the outer slot walls of the first card slot 11a and the second card slot 11b. The strength of the first card slot 11a and the second card slot 11b can be improved through a simple structure. Of course, the connecting arm 132 can also be set as other shapes as needed, such as V-shaped or M-shaped, etc.

[0056] Then referring to Figure 2 , the bottom of the connecting arm 132 can extend to the bottoms of the first card slot 11a and the second card slot 11b, and can be connected to the bottom of the first card slot 11a, the bottom of the second card slot 11b, and the reinforcing base 13, so as to further improve the strength of the first card slot 11a and the second card slot 11b.

[0057] In some embodiments, with reference to Figures 1 to 3 , Figure 5 and Figure 8 , at least one second connecting member 12 integrally formed with the cap shell 10 (e.g., integrally injection molded) may be provided on the exterior of the cap shell 10.

[0058] In this way, accessories such as cable ropes can be fixed through the second connecting member 12. Moreover, accessories such as the handle of a warning light can be clamped on the sliding groove 123. And the sliding groove 123 is provided on the second connecting member 12, which can simplify and integrate the structure and facilitate manufacturing.

[0059] Exemplarily, at least one first connecting member 11 may be located on a first side of the exterior of the cap shell 10, and at least one second connecting member 12 may be located on a second side of the exterior of the cap shell 10.

[0060] Here, the first side may be opposite to the second side. For example, the first connecting member 11 is located on the front side of the exterior of the cap shell 10, and the second connecting member 12 is located on the rear side of the exterior of the cap shell 10. When a headband is worn on the safety helmet, the two cooperate to prevent the headband from slipping. At least one sliding groove 123 may be provided on the at least one second connecting member 12.

[0061] It can be understood that at least one first connecting member 11 and at least one second connecting member 12 may also be arranged at other positions on the exterior of the cap shell 10 according to needs.

[0062] Exemplarily, at least one second connecting member 12 may include a first clamping member 12a and a second clamping member 12b arranged at intervals, and sliding grooves 123 are respectively provided on the first clamping member 12a and the second clamping member 12b. Of course, other numbers of second clamping members 12b may also be provided according to needs, such as 1, 3, or 4, etc. In addition, the second connecting member 12 may also be other connecting members, such as riveting members.

[0063] Exemplarily, the first clamping member 12a and the second clamping member 12b may respectively include a first clamping arm 121 and a second clamping arm 122. A clamping space 124 is formed between the first clamping arm 121 and the second clamping arm 122. Sliding grooves 123 may be respectively provided on the first clamping arm 121 of the first clamping member 12a and the second clamping arm 122 of the second clamping member 12b, so as to facilitate accessories such as warning lights to be arranged on the cap shell 10 through the sliding grooves 123, and the structure is compact and space-saving.

[0064] It can be understood that the sliding groove 123 may also be provided at other positions of the first clamping member 12a and the second clamping member 12b, such as on the two clamping arms of the first clamping member 12a, or on the two second clamping arms 122 or two first clamping arms 121, or the sliding groove 123 may also be provided only on one clamping arm.

[0065] In some embodiments, with reference to Figures 1 to 5 and Figure 8 , an H-shaped reinforcing rib 18 may be provided at the top of the cap shell 10. The two side arms 181 of the H-shaped reinforcing rib 18 extend from the first side to the second side of the cap shell 10, for example, from the front side to the rear side of the cap shell 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 shell 10.

[0066] In the related art, in order to enhance the strength of the top of the cap shell and help disperse and absorb the impact force, a top rib is usually provided at the top of the cap shell. However, the top ribs are mostly single top ribs, triple top ribs, five top ribs or "V"-shaped top ribs, etc., which are difficult to fully meet the high-strength protection requirements, and the shapes are relatively common and lack uniqueness, resulting in low market recognition.

[0067] In the above technical solution of the present application, an H-shaped reinforcing rib 18 is provided at the top of the cap shell 10. The structure of the reinforcing rib is symmetrical, which can relatively evenly improve the strength and impact resistance of the top of the cap shell 10, and thus improve the protection of the head. Moreover, the cap shell 10 is more beautiful and has strong recognition.

[0068] In some embodiments, with reference to Figure 4 , the cap shell 10 may be integrally injection-molded with at least one first connecting member 11, and the injection port 14 of the cap shell 10 is located inside the cap shell 10. In one example, the injection port 14 may be located in the area where the middle arm 182 of the H-shaped reinforcing rib 18 is located.

[0069] In the related art, the injection molding die of the cap shell usually includes a fixed die as a female die and a movable die as a male die. During molding, the injection molding machine injects the heated and melted plastic raw material into the mold through the injection port on the fixed die, forming the outer surface of the cap shell on the fixed die side and the inner surface of the safety cap shell on the movable die side. After molding and cooling, the movable die and the cap shell are separated from the fixed die, and the cap shell is ejected from the movable die. At the position of the injection port, an imprint of the injection port (also called a sprue mark) will be left on the cap shell, and this mark is generally formed at the top of the outer surface of the cap shell. And the weakest positions of the injection molded part are usually the weld line, the injection port and the opposite side of the injection port, etc. Therefore, when the worker wears the safety cap to work, the impact resistance of the top of the cap shell of such a safety cap will be weakened.

[0070] During injection molding, the injection port 14 is the last place where the cap shell 10 solidifies, and its strength is relatively weak compared with other areas. Setting the injection port 14 inside the cap shell 10 can prevent the cap shell 10 from directly impacting the weak part of the cap shell 10 when being impacted, so as to improve the protection ability of the head.

[0071] 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 impact on the weak part of the cap shell 10 directly when the cap shell 10 is impacted.

[0072] In some embodiments, referring to Figure 5 and 6 , a logo 19 is integrally injection-molded on the cap shell 10, and the logo 19 has a draft angle α.

[0073] In the related art, a logo is usually formed on the surface of the cap shell by direct injection molding or later printing, such as a brand logo. However, the printed logo is not wear-resistant and is prone to fading or falling off. Moreover, the printing quality is poor, which will leave consumers with an impression of not attaching importance to or being unprofessional in the brand, affecting the aesthetics of the product and the brand image. When forming a brand logo by integrally injection-molding with the cap shell, the relevant performance of the safety helmet cap shell itself needs to be not affected. Therefore, the brand logo generally protrudes a certain height on the surface of the cap shell, which causes undercuts to be easily formed during demolding and cannot be demolded smoothly. If forced to demold, it will cause the cap shell to have scratches and deformation.

[0074] According to the above solution, the logo 19, for example, the brand logo 19, can be integrally formed with the cap shell 10 to avoid the problem that the printed logo 19 is easily worn and fallen off.

[0075] In some embodiments, referring to Figure 5 and Figure 7 , the cap shell 10 can be integrally injection-molded with at least one first connecting member 11. 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, and D satisfies: 0.05 mm ≤ D ≤ 0.25 mm. For example, 0.08 mm, 0.09 mm, 0.1 mm, 0.15 mm, 0.18 mm or 0.2 mm, etc.

[0076] In this article, the edge of the inner surface of the cap shell 10 can be understood as the demarcation line between the outer surface and the inner surface of the cap shell 10 when viewed from above.

[0077] During the injection molding of the cap 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 will be sharp or uneven if not properly processed, which will reduce the wearing comfort and protection performance of the safety helmet.

[0078] The parting line has a distance D from the edge of the inner surface of the cap shell 10, which can improve the wearing comfort and protection performance of the safety helmet. In addition, controlling the distance D within the above range can avoid that the distance D is too small to achieve the corresponding effect, or the distance D is too large, affecting the appearance of the cap shell 10.

[0079] During the injection molding process, the plastic melt will generate significant stress due to the sudden change in its flow state at sharp corners, and ultimately residual stress will form at the sharp corners. When subjected to impact and vibration, the sharp corner parts are prone to cracking due to stress concentration. In addition, the sharp corners increase the flow resistance of the plastic melt, resulting in the plastic melt not being easily filled at this location and forming defective products.

[0080] In some embodiments, referring to Figures 1 to 5 and Figure 8 , at least one fixing groove 16 can be provided inside the cap shell 10. There is an arc transition between at least one fixing groove 16 and the shell of the cap shell 10 to avoid incomplete filling during injection molding between the fixing groove 16 and the shell of the cap shell 10 and causing stress concentration.

[0081] In one example, the edge of the fixing groove 16 is arc-shaped to further avoid incomplete filling during injection molding between the fixing groove 16 and the shell of the cap shell 10 and causing stress concentration.

[0082] In one example, a first limiting portion 17, such as a clamping block, a clamping groove or a hook, is provided in at least one fixing groove 16 to facilitate detachable connection with the top belt 20. Exemplarily, at least one fixing groove 16 includes 8 fixing grooves 16. Of course, other numbers of fixing grooves 16 can also be set as needed, such as 6, 7, 9 or 10, etc.

[0083] In one example, it can simultaneously satisfy that at least one fixing groove 16 can be provided inside the cap shell 10. There is an arc transition between at least one fixing groove 16 and the shell of the cap shell 10, the edge of the fixing groove 16 is arc-shaped, and a first limiting portion 17 is provided in at least one fixing groove 16.

[0084] In some embodiments, referring to Figure 1 , Figure 9 and Figure 10 , the protective device 1000 may further include a top belt 20. At least one fixing block 21 is provided at the end of the top belt 20, and at least one fixing block 21 is arranged in a one-to-one correspondence and accommodated in at least one fixing groove 16, so as to replace the top belt 20 or the cap shell 10, improve the utilization rate of the product and facilitate maintenance.

[0085] Exemplarily, the top belt 20 may include a top belt body 24 and a plurality of top belt arms 25, for example, 6 top belt arms 25. Of course, the number of top belt arms 25 can also be set as other numbers according to needs. The fixing block 21 can 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 ventilation holes 26 can be provided on the top belt body 24.

[0086] In one example, the number of the fixing blocks 21 can be eight to ensure the connection strength. Of course, the number of the fixing blocks 21 can also be set to other numbers according to needs, such as four, six, seven, nine, or ten, etc. In this case, the number of the fixing slots 16 needs to be adjusted accordingly.

[0087] Continue to refer to Figure 1 、 Figure 9 and Figure 10 , at least one of the fixing blocks 21 can be provided with a second limiting portion 22, and the first limiting portion 17 can be detachably connected to the second limiting portion 22. For example, the second limiting portion 22 is correspondingly provided as a clamping groove, a clamping block, or a hook according to the first limiting portion 17.

[0088] The top strap is the lining strap in the safety helmet that directly contacts the user's head. Usually, the connection grooves at the connection part between the safety helmet and the top strap are square, generally four or six. As described above, during injection molding, the plastic melt will generate large stresses due to the sharp change in the flow state at the sharp corners, resulting in residual stresses at the sharp corners after molding, and it is easy to cause stress concentration and cracking when subjected to impact vibration. In addition, the sharp corners increase the flow resistance, making it difficult to fill and resulting in defective products.

[0089] In one example, the side surface of at least one of the fixing blocks 21 is arc-shaped to facilitate molding and avoid stress concentration.

[0090] In one example, it can simultaneously meet that at least one of the fixing blocks 21 can be provided with a second limiting portion 22, the first limiting portion 17 can be detachably connected to the second limiting portion 22, and the side surface of at least one of the fixing blocks 21 is arc-shaped.

[0091] Then refer to Figure 1 、 Figure 9 and Figure 10 , at least one third limiting portion 23 can also be provided at the end of the top strap 20, such as a T-shaped groove, to facilitate the detachable connection with the cap hoop 30 and prevent it from falling off easily.

[0092] It can be understood that the third limiting portion 23 can also be other forms of grooves, such as U-shaped, oval, circular, or gourd-shaped, etc. Or, the third limiting portion 23 can also be a limiting block.

[0093] Refer to Figure 1 and Figures 11 to 15, the protective device 1000 may further include a cap band 30, and an adjustment structure 31 may be provided on the cap band 30. The adjustment structure 31 may include a first adjustment portion 311 and a second adjustment portion 312 respectively located at both ends of the cap band 30. At least one positioning post 3111 may be provided on the first adjustment portion 311, and at least one positioning hole 3121 may be provided on the second adjustment portion 312. The at least one positioning hole 3121 is 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 sliding of the second adjustment portion 312 into the first adjustment portion 311. In use, the connection position between the at least one positioning hole 3121 and the at least one positioning post 3111 is adjusted to adjust the enclosure size of the cap band 30.

[0094] The cap band is an adjustable band that fixes around the head circumference. In the related art, the cap band mostly uses gears to adjust the size, which will increase the overall weight of the safety helmet and affect the comfort of the wearer.

[0095] According to the above technical solution, the adjustment of the enclosure size of the cap band 30 can be achieved 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 excessively increase the weight of the protective device 1000. Moreover, on the entry side of the second adjustment portion 312, the positioning post 3111 has a first slope, which can facilitate the sliding of the second adjustment portion 312 into the first adjustment portion 311.

[0096] Exemplarily, a restraint groove may also be provided on the first adjustment portion 311 to facilitate restraining the tail of the second adjustment portion 312.

[0097] Exemplarily, the at least one positioning post 3111 may include a plurality of positioning posts 3111. The plurality of positioning posts 3111 may be evenly distributed on the first adjustment portion 311. The at least one positioning hole 3121 may include a plurality of positioning holes 3121. The plurality of positioning holes 3121 may be evenly distributed on the second adjustment portion 312. In addition, the at least one positioning post 3111 may be one positioning post 3111. In this case, the at least one positioning hole 3121 is a plurality of positioning holes 3121; or, the at least one positioning post 3111 may be a plurality of positioning posts 3111. In this case, the at least one positioning hole 3121 is one positioning hole 3121.

[0098] Reference Figures 11 to 15 , the adjustment structure 31 may further include an ejection structure 313. The ejection structure 313 is provided on the side of at least one positioning post 3111 on the first adjustment portion 311. When the ejection structure 313 is pressed, the at least one positioning hole 3121 can be disengaged from the at least one positioning post 3111. In this way, the positioning hole 3121 can be disengaged from the positioning post 3111 by pressing the ejection structure 313, and the structure is relatively simple.

[0099] Continue to refer to Figures 11 to 15 , the ejection structure 313 may include an ejector 3131 and a pressing portion 3132. The ejector 3131 protrudes from the surface of the main body of the cap band 30, and when the ejection structure 313 is pressed, at least one positioning hole 3121 can be disengaged from at least one positioning post 3111.

[0100] In one example, the height of the ejector 3131 may gradually decrease along the direction close to the positioning post 3111, so that when adjusting the enclosure size of the cap band 30, the ejector 3131 gradually enters between the first adjusting portion 311 and the second adjusting portion 312 and separates the positioning hole 3121 from the positioning post 3111, reducing the resistance and difficulty of adjustment.

[0101] Continue to refer to Figures 11 to 15 , the ejection structure 313 may include a first ejection structure 313 and a second ejection structure 313 respectively located on both sides of at least one positioning post 3111, and force can be applied by pressing from both sides, which is more convenient for adjusting the enclosure size of the cap band 30.

[0102] Refer to Figures 11 to 14 , at least one fourth limiting portion 314 may also be provided on the cap band 30, and the fourth limiting portion 314 is used for detachably connecting with the top band 20. For example, the fourth limiting portion 314 may be a T-shaped post, and the connection part is not easy to fall off. Of course, the fourth limiting portion 314 may also be set to other shapes, such as a cylindrical shape, an ellipsoidal shape 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 portion 23. In addition, the fourth limiting portion 314 may also be a T-shaped groove or other shaped grooves, and correspondingly, the third limiting portion 23 is a T-shaped post or other shaped posts.

[0103] In some embodiments, refer to Figure 1 and Figure 16 , the protective device 1000 may further include a chin strap 40. At least one fifth limiting portion 41 may be provided on the chin strap 40, and the at least one fifth limiting portion 41 is used for detachably connecting with the cap band 30.

[0104] In one example, the fifth limiting portion 41 may be a limiting groove. The limiting groove may be a T-shaped limiting groove, which can better avoid the slippage of the connection part. Of course. The limiting groove may also be other shapes, such as circular, elliptical, square or gourd-shaped, etc. Correspondingly, the shape of the connection part on the cap band 30 also changes accordingly. For example, the fourth limiting portion 314 on the cap band 30 changes accordingly. The fifth limiting portion 41 may also be a limiting block. At this time, the fourth limiting portion 314 is correspondingly a limiting groove.

[0105] In this way, the chin strap 40 can be detachably arranged on the cap shell 10, which is convenient for replacement and maintenance.

[0106] Reference Figure 16 , the chin strap 40 may include at least one fixing strap 42, at least one connecting strap 43, a first type of fastener and a second type of fastener. Both ends of the fixing strap 42 may be respectively provided with buckle 421, and the buckle 421 may be provided with a fifth limiting portion 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.

[0107] Next, referring to Figure 16 , at least one fixing strap 42 may include two fixing straps 42, and at least one connecting strap 43 may include a first connecting strap 431 and a second connecting strap 432. The two fixing 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 is provided with a second fastener 4321. The first fastener 4311 can be fastened with the second fastener 4321 to facilitate putting on and taking off the safety helmet.

[0108] Next, referring to Figure 16 , the second connecting strap 432 may be provided 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.

[0109] Next, referring to Figure 16 , the connection ends of the first connecting strap 431 and the second connecting strap 432 with the two fixing straps 42 are respectively provided with a first mating buckle 4312 and a second mating buckle 4322.

[0110] Exemplarily, the first fastener 4311 may be a socket (for example, a female buckle), and the second fastener 4321 may be a plug (for example, a male buckle). Of course, the two can also be interchanged.

[0111] Next, referring to Figure 16 , the first mating buckle 4312 and the first fastener 4311 may be integrally formed with the first connecting strap 431.

[0112] The first type of fastener may include at least one of a second mating buckle 4322 and an anti - detachment buckle 4324. In one example, the second mating buckle 4322 and the anti - detachment buckle 4324 may be integrally formed with the second connecting strap 432.

[0113] In one example, the buckle 421 is integrally formed with the fixing strap 42.

[0114] In one example, the first snap 4312 and the first fastener 4311 can be integrally formed with the first connecting band 431, the second snap 4322 and the anti - detachment buckle 4324 can be integrally formed with the second connecting band 432, and the buckle 421 can be integrally formed with the fixing band 42.

[0115] The chin strap is an adjustable accessory for auxiliary fixation, which is fastened under the chin to assist in maintaining the state and position of the safety helmet. In the related art, the connection between various buckles and fasteners of the chin strap generally adopts the method of sewing the buckle, but the connection strength of sewing is relatively low and there are many threads. The sewing thread may wear and break during long - term use or under greater external force, resulting in the separation of the strap and the buckle. Secondly, the sewing process is relatively cumbersome, requiring additional sewing materials and even manual operation, which not only increases the production cost but also reduces the production efficiency.

[0116] In this application, the first snap 4312 and the first fastener 4311 can be integrally formed with the first connecting band 431, the second snap 4322 and the anti - detachment buckle 4324 can be integrally formed with the second connecting band 432, and the buckle 421 can be integrally formed with the fixing band 42, which is convenient for automated forming, with relatively low production efficiency and cost, and the overall strength is relatively high and not easily damaged.

[0117] Next, in order to better understand the technical solution of this application, taking the protection device 1000 as a safety helmet as an example, combined with Figures 1 to 16 , the technical solution and the using process of this application will be further described in detail.

[0118] Refer to Figures 1 to 16 , the protection device 1000 provided by the embodiment of this application, for example, a safety helmet, may include a helmet shell 10, a top strap 20, a cap band 30, and a chin strap 40.

[0119] On the front side of the exterior of the helmet shell 10, a first card slot 11a and a second card slot 11b may be provided. The first card slot 11a and the second card slot 11b are provided on the reinforcement base 13, and the reinforcement base 13 is a base with a hollow upper part in a triangular shape. The first card slot 11a and the second card slot 11b can be respectively formed by the slot walls extending from the side surface of the reinforcement base 13 and the side surface of the reinforcement base 13 enclosing. The U - shaped connecting arm 132 can be connected to the outer slot walls of both the first card slot 11a and the second card slot 11b at the same time. The bottom of the connecting arm 132 can extend to the bottom of the first card slot 11a and the second card slot 11b, and can be connected to the bottom of the first card slot 11a, the bottom of the second card slot 11b, and the reinforcement base 13.

[0120] On the rear side of the outer part of the cap shell 10, two clamping members may be provided. The two clamping members may respectively include a first clamping arm 121 and a second clamping arm 122, and a clamping space 124 is formed between the first clamping arm 121 and the second clamping arm 122. On the first clamping arm 121 of one second clamping member 12b and the second clamping arm 122 of the other second clamping member 12b, sliding grooves 123 may be respectively provided to facilitate the installation of accessories such as warning lights on the cap shell 10 through the sliding grooves 123.

[0121] On the top of the cap shell 10, an H-shaped reinforcing rib 18 may be provided. The two side arms 181 of the H-shaped reinforcing rib 18 extend backward from the front side of the cap shell 10. The middle arm 182 of the H-shaped reinforcing rib 18 connects the two side walls and is located on the top of the cap shell 10.

[0122] Inside the cap shell 10, eight fixing grooves 16 may be provided. The fixing grooves 16 are in arc transition with the shell of the cap shell 10, and the edges of the fixing grooves 16 are arc-shaped. Clamping blocks are provided inside the fixing grooves 16.

[0123] The cap shell 10, the first clamping groove 11a, the second clamping groove 11b and the two clamping members are integrally injection-molded. The injection port 14 of the cap shell 10 is located inside the cap shell 10 and in the area where the middle arm 182 of the H-shaped reinforcing rib 18 is located. An identification mark 19 is integrally injection-molded on the cap shell 10, and the identification mark 19 has a demolding slope.

[0124] The distance between the parting line of the cap shell 10 and the edge of the inner surface of the cap shell 10 may be D, and D satisfies: 0.05 mm ≤ D ≤ 0.25 mm.

[0125] During use, the first clamping groove 11a can be used to fix accessories, such as fixing the rotating structure of a lamp, and the second clamping groove 11b can be used to fix the cap hook of a miner's lamp. The clamping members can fix accessories, for example, a cable rope, and at the same time, accessories can be clamped on the sliding grooves 123, for example, clamping the handle of a warning light. When setting the headband, the clamping grooves and the clamping members work together to prevent the headband from slipping.

[0126] The top band 20 may include a square top band body 24 and six top band arms 25. A plurality of ventilation holes may be provided on the top band body 24. The fixing blocks 21 may be located at the ends of the top band arms 25 or on secondary arms 27 provided at the ends of the top band arms 25. The side surfaces of the fixing blocks 21 are arc-shaped. The fixing blocks 21 may be arranged in the fixing grooves 16. Clamping grooves may be provided on the fixing blocks 21, and the clamping grooves may be detachably connected to the clamping blocks in the fixing grooves 16 to achieve the detachable connection between the top band 20 and the cap shell 10.

[0127] When installing the safety helmet, the fixing blocks 21 are received in the fixing grooves 16, and the clamping grooves are clamped with the clamping blocks to connect the top band 20 and the cap shell 10 together.

[0128] Six T-shaped grooves may also be provided at the end of the top band 20 for connecting the cap hoop 30.

[0129] An adjustment structure 31 may be provided on the cap hoop 30. The adjustment structure 31 may include a first adjustment portion 311, a second adjustment portion 312, and an ejection structure 313. The first adjustment portion 311 is located at the first end of the cap hoop 30, and the second adjustment portion 312 is located at the second end of the cap hoop 30. A plurality of positioning posts 3111 may be evenly provided on the first adjustment portion 311, and a plurality of positioning holes 3121 may be correspondingly and evenly provided on the second adjustment portion 312. The positioning holes 3121 are detachably connected to the positioning posts 3111. On the entry side of the second adjustment portion 312, the positioning posts 3111 may have a first slope to facilitate the second adjustment portion 312 to slide into the first adjustment portion 311. A through groove may also be provided on the side of the first adjustment portion 311 away from the second adjustment portion 312 to facilitate restricting the tail of the second adjustment portion 312.

[0130] The ejection structure 313 is provided on the first adjustment portion 311. The ejection structure 313 may include a bottom plate, an ejection member 3131 provided on the bottom plate, and a pressing portion 3132. The ejection member 3131 protrudes from the surface of the bottom plate. The height of the ejection member 3131 may gradually decrease along the direction close to the positioning posts 3111. The ejection structure 313 may include a first ejection structure 313 and a second ejection structure 313 respectively located on both sides of at least one positioning post 3111.

[0131] During use, the positioning holes 3121 on the second adjustment portion 312 are snap-connected to the positioning posts 3111 on the first adjustment portion 311, and the tail of the second adjustment portion 312 passes through the through groove. When it is necessary to adjust the enclosure size of the cap hoop 30, press the first ejection structure 313 and the second ejection structure 313 on both sides of the positioning post 3111 to make the ejection member 3131 gradually enter between the first adjustment portion 311 and the second adjustment portion 312 to separate the positioning hole 3121 from the positioning post 3111 and adjust the enclosure size of the cap hoop 30 to a suitable range.

[0132] Ten T-shaped posts may also be provided on the cap hoop 30. Six of the T-shaped posts are connected to the T-shaped grooves on the top band 20 at corresponding positions, and the remaining four are used to connect the chin strap 40.

[0133] During use, the cap hoop 30 is connected to the T-shaped holes on the top band 20 through the T-shaped posts.

[0134] The chin strap 40 may include two fixing straps 42, a first connecting strap 431 and a second connecting strap 432. Buckles 421 may be provided at both ends of the two fixing straps 42, and T-shaped grooves may be provided on the buckles 421 for detachably connecting with the T-shaped posts on the cap hoop 30. The two fixing straps 42 are respectively connected to the first connecting strap 431 and the second connecting strap 432. The fixing strap 42 is connected to at least one connecting strap 43 to form the chin strap 40.

[0135] One end of the first connecting strap 431 may be provided with a socket, and one end of the second connecting strap 432 is provided with a plug. The socket (e.g., female buckle) can be buckled with the plug (e.g., male buckle) to facilitate putting on and taking off the safety helmet.

[0136] The second connecting strap 432 may be provided with an adjustment 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 with the two fixing straps 42 are respectively provided with a first mating buckle 4312 and a second mating buckle 4322.

[0137] The first mating buckle 4312 and the first fastener 4311 may be integrally formed with the first connecting strap 431, the second mating buckle 4322 and the anti-disengagement buckle 4324 may be integrally formed with the second connecting strap 432, and the buckle 421 is integrally formed with the fixing strap 42.

[0138] In use, the two fixing straps 42 are connected to the T-shaped posts on the cap hoop 30 through the T-shaped grooves. The first connecting strap 431 and the second connecting strap 432 are respectively connected to the two fixing straps 42. The length of the second connecting strap 432 can be adjusted through the adjustment buckle 4323 so that the chin strap 40 matches the body types of different safety helmet users. The anti-disengagement buckle 4324 can prevent the adjustable part of the connecting strap 43 from becoming disengaged during the adjustment process. By connecting and disconnecting the socket and the plug, the two parts of the chin strap 40 can be connected to put on the safety helmet or the two parts of the chin strap 40 can be separated to take off the safety helmet.

[0139] In this application, the cap shell 10, the top strap 20, the cap hoop 30 and the chin strap 40 are detachably connected, which is convenient for replacing parts for maintenance and saves costs.

[0140] In this application, the protective device 1000 can be a safety helmet or a helmet, etc.

[0141] All terms used in this application have the same meanings as understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, etc. should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0142] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0143] It should be understood that the term "comprising" and its variations used in this application are open-ended, that is, "including but not limited to". The term "based on" means "at least in part based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least another embodiment".

[0144] 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, and these terms are only used to distinguish one element from another.

[0145] It should be noted that in the description of this application, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. 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, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0146] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. Also, for example, abutment can be direct abutment or indirect abutment through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0147] The protection scope of this application is not limited to the above embodiments. Any person skilled in the art of this technology can think of changes or substitutions within the technical scope disclosed in this application, and all should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A protective device, characterized in that: include: A cap shell, wherein at least one first connecting member is arranged on the outside of the cap shell, the at least one first connecting member is integrally formed with the cap shell, and a reinforcing structure is arranged between the at least one first connecting member and the cap shell.

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

3. The protective device according to claim 2, characterized in that: The at least one card slot includes two first card slots and a second card slot, the second card slot is formed by the external slot arms of the two first card slots and a connecting arm that simultaneously connects them, the bottom of the connecting arm extends to the bottom of the first card slot and the second card slot, and is connected to the bottom of the first card slot, the bottom of the second card slot and the reinforcing base.

4. The protection device according to claim 1, characterized in that: The exterior of the cap shell is further provided with at least one second connecting member formed integrally with the cap shell, and a sliding groove is provided on the at least one second connecting member.

5. The protection device according to claim 4, characterized in that: The at least one second connecting member comprises a first clamping member and a second clamping member arranged at intervals, the first clamping member and the second clamping member respectively comprise a first clamping arm and a second clamping arm, a clamping space is formed between the first clamping arm and the second clamping arm, and the first clamping arm of the first clamping member and the second clamping arm of the second clamping member are respectively provided with the sliding groove; and / or The at least one first connector is located on a first side of the exterior of the cap shell, and the at least one second connector is located on a second side of the exterior of the cap shell.

6. The protection device according to claim 1, characterized in that: An H-shaped reinforcement rib is arranged on the top of the cap shell, and two side arms of the H-shaped reinforcement rib extend from the first side of the cap shell to the second side, and the middle arm of the H-shaped reinforcement 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 molding port of the cap shell is located on the inner side of the cap shell.

7. The protection device according to claim 1, characterized in that: The cap shell is integrally injection molded with a logo, the logo has a demoulding slope, 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, and D satisfies: 0.05mm≤D≤0.25mm.

8. The protection device according to claim 1, characterized in that: At least one fixing groove is arranged inside the cap shell, and there is an arc transition between the at least one fixing groove and the shell of the cap shell. The edge of the fixing groove is arc-shaped, and a first limiting portion is arranged inside the at least one fixing groove.

9. The protection device according to claim 8, characterized in that: It also includes a top belt, wherein at least one fixing block is provided at the end of the top belt, the at least one fixing block is arranged in a one-to-one correspondence with the at least one fixing groove and is accommodated in 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, and the side surface of the at least one fixing block is arc-shaped; and / or At least one third limiting portion is also provided at the end of the top belt.

10. The protection device according to claim 1, characterized in that: The cap hoop is also provided with an adjustment structure, wherein the adjustment structure comprises a first adjustment portion and a second adjustment portion respectively located at two ends of the cap hoop, the first adjustment portion is provided with at least one positioning column, the second adjustment portion is provided with at least one positioning hole, the at least one positioning hole is detachably connected to the at least one positioning column, and at the entry side of the second adjustment portion, the at least one positioning column has a first slope to facilitate the second adjustment portion to slide into the first adjustment portion, and the enclosing size of the cap hoop can be adjusted by adjusting the connection position of the at least one positioning hole and the at least one positioning column.

11. The protection device according to claim 10, characterized in that: The adjustment structure also includes an ejection structure, which is arranged on the side of the at least one positioning column on the first adjustment part. The ejection structure includes an ejection piece and a pressing part. The ejection piece protrudes from the surface of the body of the cap hoop. When the ejection structure is pressed, the at least one positioning hole can be separated from the at least one positioning column; the height of the ejection piece gradually decreases in the direction approaching the positioning column.

12. The protection device according to claim 10, characterized in that: At least one fourth limiting portion is also provided on the cap band, and the fourth limiting portion is used for detachably connecting with the top band.

13. The protection device according to claim 1, characterized in that: Also included is a chin strap, the chin strap comprising: A fixing strap and a connecting strap, wherein the fixing strap and the connecting strap are connected to form the chin strap, and both ends of the fixing strap are respectively provided with an integrally formed buckle, and the buckle is provided with at least one fifth limiting portion, and the at least one fifth limiting portion is used to be detachably connected to the hat hoop; and A first type of fastener and a second type of fastener, wherein the first type of fastener is integrally formed with the connecting belt, and the second type of fastener is movably arranged on the connecting belt for adjusting the length of the chin strap.

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