Anti-falling structure for head lock lacing belt in helmet
By setting limiting grooves and connection grooves in the upper cover of the helmet lock, and using limiting projections to achieve rapid limiting of the belt, the problem of falling off caused by belt wear and limiting structure affecting the internal layout is solved, and a stable anti-detachment effect and lightweight design are achieved.
Patent Information
- Application Number
- CN202421973630.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-15
AI Technical Summary
In existing helmet locks, the belt will wear out after a long time of use, causing the belt to be taken off from the head lock or the end stuck on the gear, which will fail function, and the ordinary limit structure needs to increase the width of the belt sliding channel, affecting the internal layout of the helmet.
An anti-disengagement structure for the helmet mid-head locking belt is designed, including a limiting groove and a connection groove in the upper cover body. The limiting projection is embedded in the limiting groove to achieve rapid limiting of the belt, preventing falling off, and there is no need to increase the end size of the belt or the width of the sliding channel.
It is achieved to prevent the belt from falling off without increasing the width of the belt moving channel, ensure the belt normal operation without increasing the helmet volume or internal structural layout.
Smart Images
Figure CN222869938U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of helmets, in particular to an anti-slip structure for a head lock tightening belt in a helmet. Background Art
[0002] With the development of the economy, the use of various means of transportation is becoming more and more widespread. In order to ensure safety, helmets are an indispensable protective measure.
[0003] In the current helmet locks, when the strap is completely loosened to the end, the end of the strap and the gear will squeeze each other and rub against each other. As the use time increases, the end of the strap will cause wear and the whole will fall out of the head lock, or the end of the strap will be stuck on the gear and can no longer move left or right, causing the head lock to fail and the rotation to get stuck. Other buckle limit structures need to increase the width of the end of the strap to prevent it from falling off, which will increase the width of the sliding channel of the strap, and then it is necessary to change the internal structure and space of the head lock, resulting in the overall bulk of the head lock, which is not convenient for production and processing and is not conducive to lightweight design. Therefore, it is necessary to improve it. Utility Model Content
[0004] The utility model provides an anti-slip structure for a head lock tightening strap in a helmet, which can achieve stable anti-slipping without increasing the width of a strap moving channel, and can stably and effectively ensure that the strap will not fall off from the head lock structure and will not affect the normal operation of the strap; it solves the technical problems in the prior art that the strap in the current helmet lock will wear out after long-term use, the strap as a whole will fall off from the head lock, or the end of the strap will be stuck on the gear and cannot move left and right, resulting in failure of the head lock function and rotation jamming, and the ordinary limiting structure needs to increase the width of the strap sliding channel, which affects the internal layout of the helmet.
[0005] The above-mentioned technical problem of the utility model is solved by the following technical scheme: an anti-slip structure for a head lock tightening strap in a helmet, comprising a shell installed in the helmet, an upper cover body fixedly provided on the top of the shell, two straps are provided on both sides of the upper cover body, the two straps can be slid and adjusted to both sides respectively, a rack is provided on each strap, a channel for moving the strap is reserved in the upper cover body, a gear is embedded in the upper cover body, the rack on the strap is meshed with the gear teeth of the gear, and an anti-slip structure for preventing the strap from falling off is provided in the upper cover body; the anti-slip structure comprises a limiting groove opened at the end of the strap, and a limiting protrusion which can be embedded in the limiting groove is integrally formed on the inner wall of the cavity in the upper cover body; the anti-slip structure also comprises a connecting groove opened on the inner wall of the cavity in the upper cover body, and the connecting groove is connected with the limiting protrusion. When in use, the shell is installed as a whole in the helmet, and the gear is controlled by a knob on the surface of the helmet. By turning the knob, the gear can be driven to rotate, and then the strap can be driven to move in the upper cover body, so as to adjust the tightness of the strap. When the two straps slide outward to loosen, the anti-slip structure can prevent the rack and gear on the strap from falling off; at the same time, when the strap moves to the end, the gear pushes the lower limit protrusion to rise and embed into the limit groove for limiting. At the same time, when the limit protrusion on the inner wall of the cover body is stuck in the limit groove at the end of the strap, the strap cannot continue to slide outward, ensuring that the strap will not fall off; there is no need to increase the size of the strap end for limiting, and it can also ensure that the strap is quickly limited when it moves to the end without increasing the size of the strap end, and at the same time, the entire slide width of the strap on the shell is reduced, so as to achieve stability and prevent loosening.
[0006] Preferably, the limiting protrusion is a conical structure. The limiting protrusion and the limiting groove are interlocked with each other, the structure of the limiting protrusion can be adjusted according to needs, and the limiting protrusion with a conical structure can be more stably and accurately engaged with the limiting groove.
[0007] Preferably, the limiting protrusion is a wedge-shaped structure. The structure of the limiting protrusion can be adjusted according to demand, the structure of the limiting groove matches the limiting protrusion, and the limiting protrusion of the wedge-shaped structure has a higher strength, which can increase the service life and stability.
[0008] Preferably, the end of the strap is an arc-shaped structure with a smooth surface, so that the end of the strap with a smooth surface can slide smoothly into the connecting groove, and can also slide out of the connecting groove quickly and smoothly.
[0009] Preferably, the upper cover body is provided with a pawl integrally formed with the gear, and the inner wall of the upper cover body is integrally formed with a ratchet engaged with the pawl. The gear is driven by the pawl above, and the pawl cooperates with the ratchet to rotate clockwise and fix, thereby ensuring the locking effect.
[0010] Preferably, a knob fixedly connected to the pawl is rotatably provided on the top of the upper cover body. The knob drives the pawl to rotate. During installation, the housing is installed in the helmet as a whole, and the knob structure is exposed on the surface of the helmet. The gear can be driven to rotate by rotating the knob.
[0011] Preferably, a knob cover is embedded on the top of the knob, and the function of the knob cover is to protect the internal structure.
[0012] Therefore, the utility model provides an anti-slip structure for a head lock tightening strap in a helmet, which has the following advantages: stable anti-slipping can be achieved without increasing the width of the strap moving channel, and the strap can be stably and effectively ensured not to fall off from the head lock structure, without affecting the normal working of the strap, and without increasing the volume of the helmet or the internal structure layout. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The utility model is a three-dimensional structural schematic diagram of an anti-slip structure of a head lock tightening belt in a helmet.
[0014] Figure 2 yes Figure 1 Schematic diagram of the top view structure.
[0015] Figure 3 yes Figure 1 Schematic diagram of the top view of the cross-section structure at the middle pawl.
[0016] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0017] Figure 5 yes Figure 1 Schematic diagram of the cross-sectional structure from top view at the middle gear.
[0018] Figure 6 yes Figure 5 Enlarged view of point B in the middle.
[0019] In the figure, there are a shell 1, an upper cover 2, a strap 3, a rack 4, a knob 5, a knob cover 6, a pawl 7, a ratchet 8, a gear 9, a limiting groove 10, a connecting groove 11, and a limiting protrusion 12. DETAILED DESCRIPTION
[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.
[0021] Example:
[0022] like Figure 1 and 2As shown in 3, 4, 5 and 6, an anti-slip structure for a head lock tightening strap in a helmet comprises a shell 1 installed in the helmet, an upper cover body 2 is fixedly installed on the top of the shell 1, and straps 3 extending to the left and right respectively are installed on the rear sides of the upper cover body 2, the front and rear straps 3 are parallel to each other, and a section of each strap 3 located in the upper cover body 2 is provided with a rack 4.
[0023] A channel for moving the strap 3 is reserved in the upper cover body 2. A knob 5 is rotatably installed on the top of the upper cover body 2. A knob cover 6 is embedded on the top of the knob 5. A pawl 7 is fixedly installed on the bottom of the knob 5. A ratchet 8 that meshes with the pawl 7 is integrally formed on the inner wall of the upper cover body 2.
[0024] A gear 9 is integrally formed at the bottom of the ratchet 7 , and the gear 9 is meshed with the rack 4 on the strap 3 . An anti-drop structure for preventing the strap 3 from falling off the gear 9 is formed in the upper cover 2 .
[0025] The anti-slip structure includes a limiting groove 10 opened at the end of the strap 3, the limiting groove 10 is a conical groove, and a connecting groove 11 is opened on the inner wall of the cavity in the upper cover body 2. The end of the strap 3 can be embedded in the connecting groove 11. A limiting protrusion 12 is integrally formed on one side of the connecting groove 11, and the limiting protrusion 12 is connected to the connecting groove 11.
[0026] The limiting protrusion 12 is a conical structure, and the limiting protrusion 12 can be embedded in the limiting groove 10.
[0027] The end of the strap 3 is an arc-shaped structure with a smooth surface, and the end of the strap 3 can slide into the connecting groove 11 or slide out of the connecting groove 11.
[0028] When in use, the shell 1 is installed as a whole in the helmet, and the knob 5 structure is exposed on the surface of the helmet. By turning the knob 5, the gear 9 can be driven to rotate, and then the strap 3 can be driven to move in the upper cover 2, so as to adjust the tightness of the strap 3. When the two straps 3 slide outward to loosen, the strap 3 is pushed into the connecting groove 11 by the gear 9. At the same time, the limiting protrusion 12 in the upper cover 2 will be embedded in the limiting groove 10 on the surface of the strap 3, preventing the rack 4 and the gear 9 on the strap 3 from falling off.
Claims
1. An anti-drop structure for a head lock tightening belt in a helmet, comprising a shell installed in the helmet, characterized in that: An upper cover body is fixedly provided on the top of the shell body, and two straps are provided on both sides of the upper cover body. The two straps can be slid and adjusted to both sides respectively, and a rack is provided on each strap. A channel for moving the strap is reserved in the upper cover body, and a gear is embedded in the upper cover body. The rack on the strap is meshed with the gear teeth of the gear. An anti-slip structure is provided in the upper cover body to prevent the strap from falling off; the anti-slip structure includes a limiting groove opened at the end of the strap, and a limiting protrusion that can be embedded in the limiting groove is integrally formed on the inner wall of the cavity in the upper cover body; the anti-slip structure also includes a connecting groove opened on the inner wall of the cavity in the upper cover body, and the connecting groove is connected with the limiting protrusion.
2. The anti-drop structure for the head lock tightening belt in the helmet according to claim 1, characterized in that: The limiting protrusion is a conical structure.
3. The anti-drop structure for the head lock tightening belt in the helmet according to claim 2, characterized in that: The limiting protrusion is a wedge-shaped structure.
4. The anti-drop structure for the head lock tightening belt in the helmet according to claim 1, characterized in that: The end of the strap is an arc-shaped structure with a smooth surface.
5. The anti-drop structure for the head lock tightening belt in the helmet according to claim 1, characterized in that: The upper cover body is provided with a ratchet pawl integrally formed with the gear, and the inner wall of the upper cover body is integrally formed with a ratchet tooth meshing with the ratchet pawl.
6. The anti-drop structure for the head lock tightening belt in the helmet according to claim 5, characterized in that: The top of the upper cover body is rotatably provided with a knob fixedly connected with a ratchet.
7. The anti-drop structure for the head lock tightening belt in the helmet according to claim 6, characterized in that: A knob cover is embedded on the top of the knob.