Safety helmet

Abstract

The utility model relates to the technical field of safety helmets, and provides a safety helmet which comprises a helmet body, a helmet belt assembly is arranged on the inner side of the helmet body, the helmet belt assembly comprises a fixing belt, the fixing belt is fixedly connected to the bottom end of the inner wall of the helmet body, belt buckling pieces are arranged at the two ends of the fixing belt, and each belt buckling piece comprises a movable belt. One ends of the movable belts are fixedly connected with damping shafts, the movable belts are rotationally connected with one ends of the fixed belts through the damping shafts, adjusting grooves are formed in the other ends of the movable belts, racks are fixedly connected to the inner walls of the adjusting grooves, clamping bases are arranged on the outer sides of the movable belts, and the two movable belts are slidably connected with the two ends of the clamping bases correspondingly. A clamping piece is arranged on the inner side of the clamping base, a protecting and supporting piece is arranged on one side of the clamping base, and a rotating piece is arranged on the other side of the clamping base. According to the utility model, the movable belt and the fixed belt are rotationally connected through the damping shaft, so that the angle of the movable belt can be adjusted, and the angle of the protecting and supporting piece can be adjusted to meet the wearing requirements of different users.

Description

Technical Field

[0001] The utility model relates to the technical field of safety helmets, in particular to a safety helmet. Background Art

[0002] Safety helmets are equipment for protecting the head and are popular military and civilian products. Safety helmets are generally provided with elastic adjustment straps to comfortably fix the safety helmet on the head. Traditional adjustment straps are mostly adjusted and fixed with buckles or rope buckles. If the safety helmet is to be easy to wear and have appropriate tightness, and be comfortable and firm to wear, it often requires several adjustments back and forth, which is inconvenient to use.

[0003] In this regard, Chinese patent publication number CN213695892U discloses "two adjustment strap bodies, each of which has a first buckle at one end that can be fixed on the helmet, and a first adjustment slot at the other end, and a first rack on the inner wall of each of the first adjustment slots; a fixed seat, installed at the lower ends of the two adjustment strap bodies; including a support plate and a bottom plate parallel to each other, which are connected together by a connecting plate; a second through groove matching the adjustment strap body is formed between the support plate, the bottom plate and the connecting plate, a second boss is provided on the bottom plate, and two second slots are symmetrically provided on the connecting plate above the bottom plate."

[0004] The above patent sets two pairs of gear racks for meshing transmission to adjust the overall length and two pairs of ratchet pawls for unidirectional rotation fine-tuning. Although the length of the adjustment belt can be adjusted, in actual use, different people have different requirements for the locking angle of the adjustment belt when using it, and the above patent cannot adjust the angle of the adjustment belt, thereby failing to meet the needs of the user group; in addition, in order to better protect the user's chin, the two ends of the support on the adjustment belt will extend very long, which makes it easy to break and damage in actual use. The support and buckle of the above patent are an integrated structure, which means that the support needs to be replaced as a whole when damaged, greatly increasing the cost of use. Utility Model Content

[0005] The utility model provides a safety helmet, which solves the problem in the prior art that the adjusting belt cannot adjust the angle.

[0006] The technical scheme of the utility model is as follows: a safety helmet comprises a cap body, a chin strap assembly is arranged on the inner side of the cap body, the chin strap assembly comprises a fixing strap, the fixing strap is fixedly connected to the bottom end of the inner wall of the cap body, buckle parts are arranged at both ends of the fixing strap, the buckle parts comprise a movable strap, one end of the movable strap is fixedly connected to a damping shaft, and the movable strap is rotatably connected to one end of the fixing strap through the damping shaft, an adjustment groove is opened at the other end of the movable strap, a rack is fixedly connected on the inner wall of the adjustment groove, a clamping seat is arranged on the outer side of the movable strap, the two movable straps are respectively slidably connected to the two ends of the clamping seat, a clamping piece is arranged on the inner side of the clamping seat to limit the movement of the movable strap by cooperating with the rack, a support piece for supporting the wearer's chin is arranged on one side of the clamping seat, and a rotating piece for driving the clamping piece to rotate is arranged on the other side of the clamping seat.

[0007] Preferably, the rack on one of the movable belts is located at the top end of the corresponding adjustment slot, and the rack on the other movable belt is located at the bottom end of the corresponding adjustment slot.

[0008] Preferably, the clamping member includes a clamping sleeve, which is fixedly connected to the center position of the inner side of the clamping seat, and a rotating plate is provided on the clamping sleeve. A gear ring is fixedly connected to one side of the rotating plate, and the gear ring is rotatably connected to the clamping sleeve. The gear ring is located on the inner side of the adjusting groove, and two racks are respectively engaged with the two ends of the gear ring.

[0009] Preferably, the clamping member also includes an inner ratchet, which is fixedly connected to the inner side of the clamping seat, and elastic limit strips are fixedly connected to both ends of the rotating plate. The two elastic limit strips can cooperate with the tooth grooves of the inner ratchet by rotating the rotating plate, and one end of the two elastic limit strips is provided with a hook groove, and both ends of the rotating plate are provided with positioning grooves that cooperate with the rotating member.

[0010] Preferably, the rotating part includes a rotating cap, a sleeve is fixedly connected to the center position of the inner side of the rotating cap, the sleeve is slidably matched with the sleeve, the two ends of the inner side of the rotating cap are fixedly connected to a convex rod 1 that slidably matches with the positioning groove, and the other two ends of the inner side of the rotating cap are fixedly connected to a convex rod 2 that can slidably match with the hook groove by rotating the rotating cap.

[0011] Preferably, the support member comprises a support plate, a mounting groove is provided in the middle of the support plate, a connecting screw is threadedly connected to the inner side of the mounting groove, and the support plate is fixedly connected to the holder via the connecting screw.

[0012] Preferably, a plurality of weight-reducing grooves are provided at both ends of the support plate, and the plurality of weight-reducing grooves are evenly distributed on the support plate.

[0013] Preferably, the support plate is an arc-shaped structure, and a silicone pad is bonded to the inner side of the support plate.

[0014] The technical effects and advantages of the utility model are as follows: by sliding the ends of the two movable belts toward each other in the clamping seat and restricting the rack of the movable belt with the clamping piece, the movable belt can be clamped; since the movable belt and the fixed belt are rotatably connected via the damping shaft, the movable belt can be adjusted longitudinally, thereby achieving angle adjustment of the movable belt, and also achieving angle adjustment of the support piece to meet the wearing needs of different user groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a safety helmet.

[0016] Figure 2 It is a structural schematic diagram of the hat strap assembly of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the buckle member of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the clamping member of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the rotating part of the utility model.

[0020] Figure 6 It is a structural schematic diagram of the protective support of the utility model.

[0021] The accompanying drawings are marked as follows: 1. cap body; 2. cap strap assembly; 21. fixing strap; 22. buckle member; 221. movable strap; 222. damping shaft; 223. adjustment slot; 224. rack; 23. clamping member; 232. clamping sleeve; 233. rotating plate; 234. gear ring; 235. inner ratchet; 236. elastic limit strip; 237. hook slot; 238. positioning slot; 24. rotating member; 241. rotating cap; 242. sleeve; 243. protruding rod one; 244. protruding rod two; 25. protective support member; 251. support plate; 252. mounting slot; 253. connecting screw; 254. weight reduction slot; 26. seat. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1 - Figure 3The utility model provides a safety helmet, including a cap body 1, a cap strap assembly 2 is arranged on the inner side of the cap body 1, the cap strap assembly 2 includes a fixing strap 21, the fixing strap 21 is fixedly connected to the bottom end of the inner wall of the cap body 1, both ends of the fixing strap 21 are provided with buckle members 22, the buckle member 22 includes a movable strap 221, one end of the movable strap 221 is fixedly connected to a damping shaft 222, and the movable strap 221 is rotatably connected to one end of the fixing strap 21 through the damping shaft 222, the other end of the movable strap 221 is provided with an adjusting groove 223, and a rack 224 is fixedly connected to the inner wall of the adjusting groove 223, wherein one The rack 224 on one movable belt 221 is located at the top end of the corresponding adjustment slot 223, and the rack 224 on the other movable belt 221 is located at the bottom end of the corresponding adjustment slot 223. A holder 26 is provided on the outer side of the movable belt 221. The two movable belts 221 are slidably connected to the two ends of the holder 26 respectively. A clamping member 23 is provided on the inner side of the holder 26 for limiting the movement of the movable belt 221 by cooperating with the rack 224. A support member 25 for supporting the wearer's chin is provided on one side of the holder 26, and a rotating member 24 for driving the clamping member 23 to rotate is provided on the other side of the holder 26. By sliding the ends of the two movable belts 221 toward each other in the clamping seat 26 and restricting the rack 224 of the movable belt 221 with the clamping member 23, the clamping of the movable belt 221 can be achieved. Since the movable belt 221 and the fixed belt 21 are rotatably connected via the damping shaft 222, the movable belt 221 can be adjusted longitudinally, thereby achieving angle adjustment of the movable belt 221, and also achieving angle adjustment of the support member 25 to meet the wearing needs of different user groups.

[0024] Reference Figure 4-Figure 5The clamping member 23 includes a clamping sleeve 232, which is fixedly connected to the center position of the inner side of the clamping seat 26. A rotating plate 233 is sleeved on the clamping sleeve 232. A gear ring 234 is fixedly connected to one side of the rotating plate 233. The gear ring 234 is rotatably connected to the clamping sleeve 232. The gear ring 234 is located on the inner side of the adjusting groove 223, and the two racks 224 are respectively meshed with the two ends of the gear ring 234. An inner ratchet 235 is fixedly connected to the inner side of the clamping seat 26. Both ends of the rotating plate 233 are fixedly connected with elastic limit strips 236. The two elastic limit strips 236 can cooperate with the tooth grooves of the inner ratchet 235 by rotating the rotating plate 233. One end of the two elastic limit strips 236 is provided with Hook groove 237, positioning grooves 238 cooperating with rotating member 24 are provided at both ends of rotating plate 233; when the two movable belts 221 slide toward each other, the racks 224 of the two movable belts 221 will move synchronously, which makes the ring gear 234 rotate, that is, the rotating plate 233 rotates on the inner ratchet 235. Due to the special structure of the tooth groove of the inner ratchet 235, the elastic limit strip 236 can only cooperate with the tooth groove of the inner ratchet 235 through unidirectional rotation, which makes the ring gear 234 restricted by the elastic limit strip 236 when rotating in the reverse direction, so that the rack 224 on the movable belt 221 is restricted and cannot slide in the reverse direction, thereby making the movable belt 221 clamped.

[0025] The rotating member 24 includes a rotating cap 241, a sleeve 242 is fixedly connected to the center position of the inner side of the rotating cap 241, the sleeve 242 is slidably matched with the sleeve 232, both ends of the inner side of the rotating cap 241 are fixedly connected to a protruding rod 243 that is slidably matched with the positioning groove 238, and the other two ends of the inner side of the rotating cap 241 are fixedly connected to a protruding rod 244 that can be slidably matched with the hook groove 237 by rotating the rotating cap 241. When it is necessary to loosen the movable belt 221, the rotating cap 241 is rotated to make the second protruding rod 244 cooperate with the hook groove 237 of the corresponding elastic limiting strip 236. At the same time, the second protruding rod 244 will apply a pulling force to the elastic limiting strip 236, which makes the elastic limiting strip 236 bend inward, thereby making the elastic limiting strip 236 disengage from the tooth groove of the inner ratchet 235. At this time, the rotating plate 233 is no longer restricted and rotates with the rotating cap 241, which makes the gear ring 234 rotate in the opposite direction, and then the two movable belts 221 can slide back to each other, so that the two movable belts 221 are loosened.

[0026] Reference Figure 6The support member 25 includes a support plate 251, a mounting groove 252 is provided in the middle of the support plate 251, a connecting screw 253 is threadedly connected to the inner side of the mounting groove 252, the support plate 251 is fixedly connected to the holder 26 through the connecting screw 253, a plurality of weight-reducing grooves 254 are provided at both ends of the support plate 251, and the plurality of weight-reducing grooves 254 are evenly distributed on the support plate 251, the support plate 251 is an arc-shaped structure, and a silicone pad is bonded to the inner side of the support plate 251, and the silicone pad can improve the wearing comfort. The support plate 251 can be disassembled and installed by connecting the screws 253, so that the support plate 251 can be easily replaced when it is damaged, effectively reducing the use cost.

[0027] Working principle: When the movable belt needs to be tightened, the ends of the two movable belts 221 are slid toward each other in the clamping seat 26, and the racks 224 of the two movable belts 221 will move synchronously, which makes the ring gear 234 rotate, that is, the rotating plate 233 rotates on the inner ratchet 235. Due to the special structure of the tooth groove of the inner ratchet 235, the elastic limit strip 236 can only cooperate with the tooth groove of the inner ratchet 235 through unidirectional rotation, which makes the ring gear 234 limited by the elastic limit strip 236 when rotating in the reverse direction, so that the rack 224 on the movable belt 221 is restricted and cannot slide in the reverse direction, and then the movable belt 221 is clamped;

[0028] When it is necessary to loosen the movable belt 221, the rotating cap 241 is rotated to make the second protruding rod 244 cooperate with the hook groove 237 of the corresponding elastic limiting strip 236. At the same time, the second protruding rod 244 will apply a pulling force to the elastic limiting strip 236, which makes the elastic limiting strip 236 bend inward, thereby making the elastic limiting strip 236 disengage from the tooth groove of the inner ratchet 235. At this time, the rotating plate 233 is no longer restricted and rotates with the rotating cap 241, which makes the gear ring 234 rotate in the opposite direction, and then the two movable belts 221 can slide back to each other, so that the two movable belts 221 are loosened.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety helmet, comprising a helmet body (1), characterized in that: A chin strap assembly (2) is arranged on the inner side of the cap body (1), and the chin strap assembly (2) comprises a fixing strap (21), and the fixing strap (21) is fixedly connected to the bottom end of the inner wall of the cap body (1), and buckle members (22) are arranged at both ends of the fixing strap (21), and the buckle member (22) comprises a movable strap (221), and one end of the movable strap (221) is fixedly connected to a damping shaft (222), and the movable strap (221) is rotatably connected to one end of the fixing strap (21) via the damping shaft (222), and the other end of the movable strap (221) is provided with an adjustment slot (223). A rack (224) is fixedly connected to the inner wall of the adjustment groove (223); a holder (26) is arranged on the outer side of the movable belt (221); the two movable belts (221) are slidably connected to the two ends of the holder (26) respectively; a clamping member (23) is arranged on the inner side of the holder (26) for limiting the movement of the movable belt (221) by cooperating with the rack (224); a support member (25) for supporting the chin of the wearer is arranged on one side of the holder (26); and a rotating member (24) for driving the clamping member (23) to rotate is arranged on the other side of the holder (26).

2. A safety helmet according to claim 1, characterized in that: The rack (224) on one of the movable belts (221) is located at the top end of the corresponding adjustment slot (223), and the rack (224) on the other movable belt (221) is located at the bottom end of the corresponding adjustment slot (223).

3. A safety helmet according to claim 2, characterized in that: The clamping member (23) comprises a clamping sleeve (232), the clamping sleeve (232) is fixedly connected to the center position of the inner side of the clamping seat (26), a rotating plate (233) is sleeved on the clamping sleeve (232), a gear ring (234) is fixedly connected to one side of the rotating plate (233), the gear ring (234) is rotatably connected to the clamping sleeve (232), the gear ring (234) is located on the inner side of the adjustment groove (223), and the two racks (224) are respectively meshed with the two ends of the gear ring (234).

4. A safety helmet according to claim 3, characterized in that: The clamping member (23) further comprises an inner ratchet (235), wherein the inner ratchet (235) is fixedly connected to the inner side of the clamping seat (26), and both ends of the rotating plate (233) are fixedly connected with elastic limit strips (236), and the two elastic limit strips (236) can cooperate with the tooth grooves of the inner ratchet (235) by rotating the rotating plate (233), and one end of the two elastic limit strips (236) is provided with a hook groove (237), and both ends of the rotating plate (233) are provided with positioning grooves (238) that cooperate with the rotating member (24).

5. A safety helmet according to claim 4, characterized in that: The rotating member (24) comprises a rotating cap (241), a sleeve (242) is fixedly connected to the center position of the inner side of the rotating cap (241), the sleeve (242) is slidably matched with the clamping sleeve (232), both ends of the inner side of the rotating cap (241) are fixedly connected to a protruding rod (243) slidably matched with the positioning groove (238), and the other two ends of the inner side of the rotating cap (241) are fixedly connected to a protruding rod (244) that can slidably match with the hook groove (237) by rotating the rotating cap (241).

6. A safety helmet according to claim 1, characterized in that: The support member (25) comprises a support plate (251), a mounting groove (252) is provided in the middle of the support plate (251), a connecting screw (253) is threadedly connected to the inner side of the mounting groove (252), and the support plate (251) is fixedly connected to the holder (26) via the connecting screw (253).

7. A safety helmet according to claim 6, characterized in that: Both ends of the support plate (251) are provided with a plurality of weight-reducing grooves (254), and the plurality of weight-reducing grooves (254) are evenly distributed on the support plate (251).

8. A safety helmet according to claim 6, characterized in that: The support plate (251) is an arc-shaped structure, and a silicone pad is bonded to the inner side of the support plate (251).

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