A releasable motorcycle helmet

Abstract

The utility model belongs to the motorcycle helmet technical field, concretely relates to a motorcycle helmet of elasticity, including the helmet, the inboard swing joint of helmet has first bandage and second bandage, and first bandage sets up at the outside of second bandage, and second bandage is symmetrical with first bandage and is partially overlapped and sets up, the inboard of both ends of first bandage and second bandage is provided with the meshing groove, the top of the inboard of meshing groove on first bandage is provided with top rack, the bottom of the inboard of meshing groove on second bandage is provided with bottom rack, both ends in the helmet are rotatably connected with rotating shaft, the outside of rotating shaft is provided with gear, and two gears are inserted into two meshing grooves respectively. The utility model can accurately adapt to different head shapes such as front and rear flat round and forehead protrusion, solve the discomfort such as front side brow bone compression and rear side loosening that easily appear in the single rear side adjustment of the prior art, and further can improve the helmet wearing fit and comfort, and enhance the wearing stability.

Description

Technical Field

[0001] This utility model belongs to the field of motorcycle helmet technology, specifically relating to an adjustable motorcycle helmet. Background Technology

[0002] As a core piece of equipment for riding safety, the fit of a motorcycle helmet directly affects its protective performance and comfort. To accommodate different head circumferences of users, various helmet strap adjustment devices have been developed in the current technology, which realize the adjustable function of the strap circumference through mechanical structure.

[0003] Currently, most mainstream helmet tightness adjustment solutions adopt a single adjustment point design. Typical structures include ratchet adjusters, gear and rack adjustment mechanisms, and press-type adjustment devices. These devices usually only have an adjustment mechanism on the back of the helmet. By rotating the knob or pressing the operation, the rack and gear of the strap are driven to mesh and transmit power, thereby reducing or increasing the overall circumference of the strap to fit different head sizes.

[0004] However, existing technologies still have limitations. For example, existing devices all use a single adjustment point as the core to achieve overall circumference adjustment, which cannot accurately adapt to the differences in the user's head shape. Since there are individual differences in human head shape, such as front and back flat round, protruding forehead, and full back of head, adjusting only the back side can only achieve uniform scaling of the band, which is difficult to solve the problem of local fit. Discomfort such as the front side pressing on the brow bone and the back side loosening often occurs.

[0005] In summary, the existing motorcycle helmet tension adjustment structure can only meet the basic head circumference adaptation requirements. It lacks an independent front and rear adjustment mechanism that uses each other as reference points, and cannot accurately adapt to diverse head shapes. Therefore, developing a strap tension adjustment structure that can achieve independent front and rear adjustment and use each other as reference points during the adjustment process has become a key requirement to solve the shortcomings of the existing technology. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable motorcycle helmet that can precisely fit different head shapes, such as flat front and back, or protruding forehead. This solves the discomfort caused by the existing single rear adjustment, such as the front pressing on the brow bone and the rear loosening. In this way, it can improve the fit and comfort of the helmet and enhance its stability.

[0007] The specific technical solution adopted by this utility model is as follows:

[0008] An adjustable motorcycle helmet includes a helmet with a first strap and a second strap movably connected to its inner side. The first strap is positioned outside the second strap, and the second strap is symmetrical to and partially overlaps the first strap. Engaging grooves are provided on the inner sides of both ends of the first and second straps. A top rack is provided at the top of the inner side of the engagement groove on the first strap, and a bottom rack is provided at the bottom of the inner side of the engagement groove on the second strap. Rotating shafts are rotatably connected to both ends inside the helmet. Gears are provided on the outer side of the rotating shafts, and two gears are respectively inserted into the two engagement grooves, engaging with the two bottom racks and the top rack respectively.

[0009] A snap-fit ​​structure is installed between the rotating shaft and the helmet.

[0010] Mounting plates are installed on the outer sides of both ends of the first and second bands. Two guide strips are provided at the top and bottom of the inner side of the mounting plates. Guide grooves are provided at the top and bottom of the first and second bands. The two guide strips located at the top and bottom of the first and second bands are respectively inserted into the guide grooves.

[0011] The snap-fit ​​structure includes a following rotating plate fixed to the outside of the rotating shaft. A plurality of snap-fit ​​blocks are fitted on one side of the following rotating plate. A fixing ring is fixed inside the helmet and located on the outside of the rotating shaft. A plurality of snap-fit ​​slots corresponding to the snap-fit ​​blocks are provided on the side of the fixing ring near the following rotating plate, and the snap-fit ​​blocks and the snap-fit ​​slots snap-fit ​​each other.

[0012] The retaining ring is provided with a slide rail on the side close to the slot and on the outside of the slot.

[0013] A first connecting fabric piece is installed inside the helmet and outside the first and second straps, and a second connecting fabric piece is installed inside the helmet and inside the first and second straps, and the first and second connecting fabric pieces are fixed to each other.

[0014] The first connecting fabric piece and the second connecting fabric piece are secured by Velcro or buttons.

[0015] The mounting plate has a first mounting groove on its inner side, and the first connecting cloth piece and the second connecting cloth piece each have a second mounting groove on their inner sides. The first mounting groove and the second mounting groove are located on the outer side of the rotating shaft.

[0016] The technical effects achieved by this utility model are as follows:

[0017] This invention features adjustable tightness structures on both the front and rear sides of the helmet, with each side serving as a reference point for adjustment. This allows for precise adaptation to different head shapes, such as those with flat or rounded front and rear sides or protruding foreheads. It solves the discomfort caused by the existing single rear-side adjustment, which can lead to issues like the front side pressing on the brow bone or the rear side becoming loose. This improves the helmet's fit and comfort, enhances wearing stability, and effectively compensates for the shortcomings of existing structures that only meet basic head circumference requirements, thus satisfying users' personalized adjustment needs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the helmet in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure between the meshing groove, the first connecting cloth piece, and the rotating shaft in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure between the first hoop, the second hoop, and the gear in this utility model;

[0022] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 This utility model Figure 4 Enlarged view of point B in the middle.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Helmet; 2. First hoop; 3. Second hoop; 4. Engaging groove; 5. Bottom rack; 6. Rotating shaft; 7. Gear; 8. Follower rotating plate; 9. Locking block; 10. Fixing ring; 11. Slide rail; 12. Locking groove; 13. Mounting plate; 14. Guide strip; 15. Guide groove; 16. First setting groove; 17. First connecting fabric piece; 18. Second connecting fabric piece; 19. Second setting groove; 20. Top rack. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figures 1-6As shown, an adjustable motorcycle helmet includes a helmet 1. A first strap 2 and a second strap 3 are movably connected to the inner side of the helmet 1. The first strap 2 is located outside the second strap 3. The second strap 3 is symmetrical to the first strap 2 and partially overlaps it. Both ends of the first strap 2 and the second strap 3 are provided with meshing grooves 4. A top rack 20 is provided at the top of the meshing groove 4 on the first strap 2, and a bottom rack 5 is provided at the bottom of the meshing groove 4 on the second strap 3. Both ends of the helmet 1 are rotatably connected to a rotating shaft 6. Gears 7 are provided on the outer side of the rotating shaft 6. The two gears 7 are respectively inserted into the two meshing grooves 4, and the two gears 7 are respectively meshed with the two bottom racks 5 and the top rack 20.

[0028] When it is necessary to adjust the first band 2 and the second band 3 from the back or front of the helmet 1 to adjust the tightness of the first band 2 and the second band 3 on the head, the rotating shaft 6 can be turned so that the rotating shaft 6 drives the gear 7 to rotate. The gear 7 is engaged with the bottom rack 5 and the top rack 20. Since the top rack 20 is located on the upper side and the bottom rack 5 is located on the lower side, the first band 2 and the second band 3 move in opposite directions, thereby adjusting the tightness of the first band 2 and the second band 3 together.

[0029] A snap-fit ​​structure is installed between the rotating shaft 6 and the helmet 1. This snap-fit ​​structure restricts one of the gears 7, preventing it from rotating when the other rotating shaft 6 rotates, thus preventing the first and second straps 2 and 3 from moving. A first connecting fabric piece 17 is installed inside the helmet 1, outside the first and second straps 2 and 3, and a second connecting fabric piece 18 is installed inside the helmet 1, inside the first and second straps 2 and 3. The first and second connecting fabric pieces 17 and 18 are fixed together by Velcro or buttons, etc. The components are fixed in place. When it is necessary to rotate the rotating shaft 6 at one end, the gear 7 and the following rotating piece 8 at this end can be separated, thereby rotating the gear 7 and driving the first hoop 2 and the second hoop 3 to move. Meanwhile, the first connecting cloth piece 17 and the second connecting cloth piece 18 at the other end should not be separated, so that the first connecting cloth piece 17 and the second connecting cloth piece 18 can pull the first hoop 2 and the second hoop 3 at this point. At this time, the ring formed by the first hoop 2 and the second hoop 3 will shrink or expand with the position of the first connecting cloth piece 17 and the second connecting cloth piece 18 that have not been separated as the base point, so that the user can adjust the helmet 1 according to his own head shape.

[0030] See attached document Figure 4 and Figure 6Mounting plates 13 are installed on the outer sides of both ends of the first hoop 2 and the second hoop 3. Two guide strips 14 are provided at the top and bottom of the inner side of the mounting plate 13. Guide grooves 15 are provided at the top and bottom of the first hoop 2 and the second hoop 3. The two guide strips 14 located at the top and bottom of the first hoop 2 and the second hoop 3 are respectively inserted into the guide grooves 15. With this arrangement, the mounting plate 13 can limit the first hoop 2 and the second hoop 3 through the guide strips 14, so that when the first hoop 2 and the second hoop 3 slide, the guide grooves 15 will only slide on the outside of the guide strips 14, avoiding the situation where the meshing effect of the gear 7, the top rack 20 and the bottom rack 5 is limited.

[0031] See attached document Figures 4-5 The snap-fit ​​structure includes a following rotating plate 8 fixed to the outside of the rotating shaft 6. Multiple locking blocks 9 are mounted on one side of the following rotating plate 8. A fixing ring 10 is fixed inside the helmet 1, located on the outside of the rotating shaft 6. Multiple locking grooves 12 corresponding to the locking blocks 9 are provided on the side of the fixing ring 10 near the following rotating plate 8, and the locking blocks 9 and the locking grooves 12 engage with each other. When the rotating shaft 6 rotates, it drives the gear 7 to rotate, which in turn drives the following rotating plate 8 and the locking blocks 9 to rotate, allowing the locking blocks 9 to slide along the slide rail 11 within the locking grooves 12. The locking blocks 9 are made of a relatively hard but flexible material, such as nitrile rubber. When subjected to a large force, the locking block 9 can deform and move from one of the slots 12 to the other. The other locking block 9 on the rotating plate 8 is subjected to a smaller force, so it will not deform. This keeps the locking block 9 firmly locked in the slot 12 and prevents it from moving. This also prevents the first hoop 2 and the second hoop 3 from moving. The fixing ring 10 is provided with a slide 11 on the side of the slot 12 near the outside of the slot 12. The slide 11 allows the locking block 9 to slide within the slide 11, preventing it from falling off.

[0032] The inner side of the mounting plate 13 is provided with a first mounting groove 16, and the inner sides of the first connecting cloth plate 17 and the second connecting cloth plate 18 are both provided with a second mounting groove 19. The first mounting groove 16 and the second mounting groove 19 are located on the outer side of the rotating shaft 6. This arrangement allows the first mounting groove 16 and the second mounting groove 19 to provide space for the gear 7, thus preventing the rotating shaft 6 from being restricted when rotating.

[0033] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A motorcycle helmet with adjustable tension, comprising a helmet (1), characterized in that: The helmet (1) is movably connected to a first band (2) and a second band (3) on its inner side. The first band (2) is located on the outer side of the second band (3). The second band (3) is symmetrical to the first band (2) and partially overlaps with it. Both ends of the first band (2) and the second band (3) are provided with meshing grooves (4). The top of the meshing groove (4) on the first band (2) is provided with a top rack (20). The bottom of the meshing groove (4) on the second band (3) is provided with a bottom rack (5). Both ends of the helmet (1) are rotatably connected to a rotating shaft (6). The outer side of the rotating shaft (6) is provided with a gear (7). The two gears (7) are respectively inserted into the two meshing grooves (4). The two gears (7) are respectively meshed with the two bottom racks (5) and the top rack (20). A snap-fit ​​structure is installed between the rotating shaft (6) and the helmet (1).

2. The adjustable motorcycle helmet according to claim 1, characterized in that: Mounting plates (13) are installed on the outer sides of both ends of the first band (2) and the second band (3). Two guide strips (14) are provided on the top and bottom of the inner side of the mounting plate (13). Guide grooves (15) are provided on the top and bottom of the first band (2) and the second band (3). The two guide strips (14) located at the top and bottom of the first band (2) and the second band (3) are respectively inserted into the guide grooves (15).

3. The adjustable motorcycle helmet according to claim 2, characterized in that: The snap-fit ​​structure includes a following rotating plate (8) fixed to the outside of the rotating shaft (6). A plurality of snap-fit ​​blocks (9) are assembled on one side of the following rotating plate (8). A fixing ring (10) is fixed inside the helmet (1) and located on the outside of the rotating shaft (6). A plurality of slots (12) corresponding to the snap-fit ​​blocks (9) are provided on the side of the fixing ring (10) near the following rotating plate (8), and the snap-fit ​​blocks (9) and the slots (12) snap-fit ​​each other.

4. The adjustable motorcycle helmet according to claim 3, characterized in that: The fixing ring (10) is provided with a slide (11) on the side close to the slot (12) and on the outside of the slot (12).

5. A motorcycle helmet with adjustable tension according to claim 4, characterized in that: A first connecting fabric piece (17) is installed inside the helmet (1) and outside the first strap (2) and the second strap (3). A second connecting fabric piece (18) is installed inside the helmet (1) and inside the first strap (2) and the second strap (3). The first connecting fabric piece (17) and the second connecting fabric piece (18) are fixed to each other.

6. A motorcycle helmet with adjustable tension according to claim 5, characterized in that: The first connecting fabric piece (17) and the second connecting fabric piece (18) are secured by Velcro or buttons.

7. A motorcycle helmet with adjustable tension according to claim 6, characterized in that: The mounting plate (13) has a first mounting groove (16) on its inner side, and the first connecting cloth piece (17) and the second connecting cloth piece (18) each have a second mounting groove (19) on their inner sides. The first mounting groove (16) and the second mounting groove (19) are located on the outer side of the rotating shaft (6).

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