A helmet strap adjustment device

Abstract

This utility model discloses a helmet strap adjustment device, including an adjuster. A rotating shaft is rotatably connected to the center of the inner side of the adjuster. A strap is wound around one side of the outer surface of the rotating shaft, and a ratchet is fixedly connected to the other side of the outer surface of the rotating shaft. This helmet strap adjustment device, through the arrangement of a rotating shaft, ratchet, pawl, cam, and coil spring, achieves locking of the rotating shaft's rotation through the cooperation of the ratchet and pawl, preventing the strap from accidentally loosening during wear and improving wearing stability. When the strap length needs to be adjusted, the rotation of the cam causes one set of pawls to disengage from the ratchet. At this time, the rotating shaft can rotate in one direction to adjust the strap length. Simultaneously, when the rotating shaft rotates, the coil spring contracts. When the cam is turned again, the other set of pawls disengages from the ratchet. Under the rebound force of the coil spring, the strap can automatically rewind after loosening, allowing users to make precise adjustments according to their needs and improving wearing comfort.

Description

Technical Field

[0001] This utility model relates to the field of helmet accessories technology, and in particular to a helmet strap adjustment device. Background Technology

[0002] When wearing a helmet, it is necessary to keep the helmet and the head in a tight connection to prevent the helmet from separating from the head and failing to provide protection in the event of a mechanical impact. Currently, the helmet is usually connected to the head by straps.

[0003] According to the search, Chinese Patent Publication (Announcement) No. CN212647160U discloses a virtual reality helmet strap adjustment device, which includes a rectangular shell. The upper and lower ends of the shell are respectively provided with left and right sliding grooves. The left and right sides between the two sliding grooves are respectively slidably connected with vertical fixing blocks. Straps are provided at the opposite ends of the two fixing blocks. This structure is simple, novel in concept, convenient to use, and highly practical.

[0004] Although the straps in the aforementioned patent are adjustable, the adjustment method is complex, and the straps are prone to loosening in actual use, which cannot meet the user's needs for helmet wearing stability and comfort. Therefore, it is necessary to design a helmet strap adjustment device to solve the above problems. Utility Model Content

[0005] The main objective of this invention is to provide a helmet strap adjustment device that can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A helmet strap adjustment device includes an adjuster. A rotating shaft is rotatably connected to the center of the inner side of the adjuster. A strap is wound around one side of the outer surface of the rotating shaft. A ratchet is fixedly connected to the other side of the outer surface of the rotating shaft. Support rods are fixedly connected to both sides of the bottom of the inner side of the adjuster. A pawl is rotatably connected to the outer surface of the support rod. A spring is fixedly connected to one side of the outer surface of the pawl. The spring is fixedly connected to the adjuster. A cam is rotatably connected to the inner side of the adjuster near the pawl. A coil spring is fixedly connected to the outer surface of the support rod near the ratchet.

[0008] In order to achieve the effect of easy control of the cam, as a helmet strap adjustment device of this utility model, the cam is fixedly connected to a connecting rod, the connecting rod passes through the adjuster and is rotatably connected to it, and a control block is fixedly connected to one end of the connecting rod.

[0009] In order to avoid hard contact between the adjuster and the connector and the face, as a helmet strap adjustment device of this utility model, the end of the strap away from the adjuster is fixedly connected to the connector, and silicone pads are fixedly connected to the outer surfaces of the connector and the adjuster.

[0010] In order to facilitate the connection of the helmet, as a helmet strap adjustment device of this utility model, both sides of the outer surface of the connector and the adjuster are fixedly connected with an extension strap, and the top of the outer surface of the extension strap is fixedly connected with a connecting ring.

[0011] In order to achieve the effect of protecting the chin, as a helmet strap adjustment device of this utility model, a chin strap is movably connected to the middle of the outer surface of the strap, and a pad is fixedly connected to the upper surface of the chin strap.

[0012] In order to facilitate the installation of the chin strap, as a helmet strap adjustment device of this utility model, one side of the outer surface of the chin strap is fixedly connected with a Velcro adhesive surface, and the other side of the outer surface of the chin strap is fixedly connected with a Velcro hook surface.

[0013] In order to achieve the effect of easy nighttime reflection, as a helmet strap adjustment device of this utility model, the outer surface of the strap is provided with a reflective strip, which is used to reflect light at night or in low light environment.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this utility model, the rotation of the shaft, ratchet, pawl, cam, and coil spring are configured to lock the strap in place, preventing it from accidentally coming loose during wear and improving stability. When the strap length needs to be adjusted, the rotation of the cam causes one set of pawls to disengage from the ratchet, allowing the shaft to rotate in one direction and loosen the strap, thus adjusting its length. Simultaneously, the coil spring retracts as the shaft rotates, and when the cam is turned again, the other set of pawls disengages from the ratchet. Under the spring's rebound force, the strap automatically retracts after being loosened, allowing users to make precise adjustments according to their needs and improving wearing comfort.

[0016] 2. In this utility model, through the setting of silicone pad, liner, hook and loop fastener, hook and loop hook, and reflective strip, the silicone pad has good softness and elasticity, which can effectively reduce the hard contact between the device and the user's head. The liner can effectively reduce the friction between the chin strap and the user's chin, improve wearing comfort, and reduce impact. Through the cooperation of the hook and loop fastener and hook and loop hook, the user can quickly install and remove the chin strap, or adjust the tightness of the chin strap to ensure that the chin strap can fit the user's chin tightly, improving the stability and safety of wearing. The reflective strip can improve the wearer's visibility at night or in low light environments, enhancing safety, especially suitable for cycling or outdoor sports scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0018] Figure 2 This is a rear view structural diagram of an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the regulator according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the chin strap structure according to an embodiment of the present invention.

[0022] In the diagram: 1. Adjuster; 2. Shaft; 3. Strap; 4. Ratchet; 5. Support rod; 6. Pawl; 7. Spring; 8. Cam; 9. Linkage; 10. Control block; 11. Connector; 12. Silicone pad; 13. Extension strap; 14. Connecting ring; 15. Chin strap; 16. Pad; 17. Hook and loop fastener; 18. Hook and loop hook fastener; 19. Reflective strip; 20. Coil spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] like Figure 1-5As shown, a helmet strap adjustment device includes an adjuster 1. A rotating shaft 2 is rotatably connected to the middle of the inner side of the adjuster 1. A strap 3 is wound around one side of the outer surface of the rotating shaft 2. A ratchet 4 is fixedly connected to the other side of the outer surface of the rotating shaft 2. Support rods 5 are fixedly connected to both sides of the bottom of the inner side of the adjuster 1. A pawl 6 is rotatably connected to the outer surface of the support rod 5. A spring 7 is fixedly connected to one side of the outer surface of the pawl 6. The spring 7 is fixedly connected to the adjuster 1. A cam 8 is rotatably connected to the inner side of the adjuster 1 near the pawl 6. A coil spring 20 is fixedly connected to the outer surface of the support rod 5 near the ratchet 4.

[0026] In practical use, the rotating shaft 2, ratchet 4, pawl 6, cam 8, and coil spring 20 are used. The rotating shaft 2 is the core component for winding the strap 3, ensuring that the strap 3 will not loosen or slip during winding. The rotation of the rotating shaft 2 is locked by the cooperation of the ratchet 4 and pawl 6, preventing the strap 3 from accidentally loosening during wearing and improving wearing stability. The ratchet 4 is fixedly connected to the other end of the rotating shaft 2, and its outer surface is designed with multiple ratchet teeth for cooperating with two sets of opposing pawls 6 to achieve bidirectional locking. The pawls 6 are connected to the adjuster 1 through the support rod 5 and are provided with elastic support by the spring 7 to ensure... Pad 6 can closely engage with the ratchet teeth of ratchet 4. When the length of strap 3 needs to be adjusted, the rotation of cam 8 causes one set of pads 6 to disengage from ratchet 4. At this time, the rotating shaft 2 can rotate in one direction, loosening the strap 3 and thus adjusting its length. Simultaneously, as the rotating shaft 2 rotates, the coil spring 20 retracts. When cam 8 is turned again, the other set of pads 6 disengages from ratchet 4. Under the rebound force of the coil spring 20, the strap 3 can automatically retract and wrap after being loosened, allowing users to make precise adjustments according to their needs, improving wearing comfort, and providing flexible and convenient operation while saving time and effort.

[0027] In this embodiment, a connecting rod 9 is fixedly connected inside the cam 8. The connecting rod 9 passes through the adjuster 1 and is rotatably connected to it. A control block 10 is fixedly connected to one end of the connecting rod 9.

[0028] In practical use, the cam 8 is connected to the control block 10 outside the regulator 1 via the connecting rod 9, which makes it easy for the user to operate the cam 8 through the control block 10, thereby controlling the rotation direction of the ratchet 4. The operation is simple and convenient.

[0029] In this embodiment, a connector 11 is fixedly connected to the end of the strap 3 away from the adjuster 1, and silicone pads 12 are fixedly connected to the outer surfaces of both the connector 11 and the adjuster 1.

[0030] In practical use, the silicone pad 12 has good softness and elasticity, which can effectively reduce hard contact between the device and the user's head and improve wearing comfort.

[0031] In this embodiment, extension straps 13 are fixedly connected to both sides of the outer surface of the connector 11 and the adjuster 1, and a connecting ring 14 is fixedly connected to the top of the outer surface of the extension straps 13.

[0032] In practical use, extension straps 13 are fixedly connected to both sides of the outer surface of the connector 11 and the adjuster 1. The length of the extension straps 13 can be adjusted according to the design requirements of the helmet. The connecting ring 14 is used to connect with other parts of the helmet to ensure the overall structural stability of the helmet. This allows the device to be easily installed on different types of helmets, making it highly adaptable.

[0033] In this embodiment, a chin strap 15 is movably connected to the middle of the outer surface of the strap 3, and a pad 16 is fixedly connected to the upper surface of the chin strap 15.

[0034] In practical use, the chin strap 15 is used to protect the user's chin, and the padding 16 is made of soft material, which can effectively reduce the friction between the chin strap 15 and the user's chin, improve wearing comfort, and at the same time protect the chin from direct impact when the helmet is impacted, providing a cushioning effect and reducing impact force.

[0035] In this embodiment, a Velcro adhesive surface 17 is fixedly connected to one side of the outer surface of the chin strap 15, and a Velcro hook surface 18 is fixedly connected to the other side of the outer surface of the chin strap 15.

[0036] In practical use, the user can quickly install or remove the chin strap 15 by using the Velcro adhesive side 17 and the Velcro hook side 18, or adjust the tightness of the chin strap 15 to ensure that the chin strap 15 fits the user's chin tightly, thereby improving the stability and safety of wearing it.

[0037] In this embodiment, the outer surface of the strap 3 is provided with a reflective strip 19, which is used to reflect light at night or in low light environments.

[0038] In practical use, reflective strip 19 can improve the wearer's visibility at night or in low-light environments, enhancing safety, and is especially suitable for cycling or outdoor sports scenarios.

[0039] Working principle: During use, the user controls the rotation of the cam 8 by operating the control block 10, causing one set of pawls 6 to disengage from the ratchet 4. At this time, the rotating shaft 2 can rotate in one direction, and the strap 3 is loosened. The user can adjust the length of the strap 3. During the adjustment process, the rotation of the rotating shaft 2 will cause the coil spring 20 to contract. When the user moves the control block 10 again, the cam 8 rotates, causing the other set of pawls 6 to disengage from the ratchet 4. At this time, under the action of the rebound force of the coil spring 20, the rotating shaft 2 rotates in the opposite direction, and the strap 3 automatically retracts and wraps around the rotating shaft 2, thus tightening the strap 3. In this way, the user can make precise adjustments according to their own needs, improving wearing comfort. At the same time, the operation is flexible and convenient, saving time and effort. In addition, the reflective strip 19 on the outer surface of the strap 3 can reflect light at night or in low light environments, improving the wearer's visibility and enhancing safety, especially suitable for cycling or outdoor sports scenarios.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A headgear strap adjustment device comprising an adjuster (1), characterised in that: A rotating shaft (2) is rotatably connected to the middle of the inner side of the regulator (1). A strap (3) is wrapped around one side of the outer surface of the rotating shaft (2). A ratchet (4) is fixedly connected to the other side of the outer surface of the rotating shaft (2). Support rods (5) are fixedly connected to both sides of the bottom of the inner side of the regulator (1). A pawl (6) is rotatably connected to the outer surface of the support rod (5). A spring (7) is fixedly connected to one side of the outer surface of the pawl (6). The spring (7) is fixedly connected to the regulator (1). A cam (8) is rotatably connected to the inner side of the regulator (1) near the pawl (6). A coil spring (20) is fixedly connected to the outer surface of the support rod (5) near the ratchet (4).

2. A headgear strap adjustment device according to claim 1, wherein: A connecting rod (9) is fixedly connected inside the cam (8). The connecting rod (9) passes through the adjuster (1) and is rotatably connected to it. A control block (10) is fixedly connected to one end of the connecting rod (9).

3. A headgear strap adjustment device according to claim 1, wherein: The end of the strap (3) away from the adjuster (1) is fixedly connected to a connector (11), and both the connector (11) and the outer surface of the adjuster (1) are fixedly connected to silicone pads (12).

4. A headgear strap adjustment device according to claim 3, wherein: Both sides of the outer surface of the connector (11) and the regulator (1) are fixedly connected to an extension band (13), and a connecting ring (14) is fixedly connected to the top of the outer surface of the extension band (13).

5. A headgear strap adjustment device according to claim 1, wherein: A chin strap (15) is movably connected to the middle of the outer surface of the strap (3), and a pad (16) is fixedly connected to the upper surface of the chin strap (15).

6. A headgear strap adjustment device according to claim 5, wherein: A Velcro adhesive surface (17) is fixedly connected to one side of the outer surface of the chin strap (15), and a Velcro hook surface (18) is fixedly connected to the other side of the outer surface of the chin strap (15).

7. A headgear strap adjustment device according to claim 1, wherein: The outer surface of the strap (3) is provided with a reflective strip (19), which is used to reflect light at night or in low light environments.

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