Variable jaw structure protecting helmet

Abstract

The invention belongs to the technical field of helmet, relating to a variable jaw structure protecting helmet. The helmet comprises a helmet main body, a jaw guard and two mould boards; wherein the jaw guard is provided with two fork handles, the two mould boards are respectively arranged at the two sides of the helmet case main body, the mould board is fastened and connected with the helmet case main body or the mould boards are connected with the helmet main body into a whole, each mould board is opened with two groove-shaped guide rails and is additionally provided with four movable pins, one end of each movable pin is inserted into the four guide rails on the two mould boards, each fork handle is respectively connected with the two movable pins, the jaw guard drives the movable pin by virtue of the fork handle, each movable pin moves along respective corresponding guide rail, and the position of the jaw guard can be changed under the constraints of the movable pin and the guide rail. Compared with the prior art, the invention has the advantages that no guide rail is arranged on the jaw guard, bending strength of fork handle is improved, fracture resistance of the fork handle of the jaw guard is improved, besides, stress concentration hidden danger can be effectively eliminated by abandoning the chute of the fork handle, and meanwhile strength of jaw guard is improved.

Description

technical field [0001] The invention relates to a helmet for protecting human head safety, in particular to a helmet worn by drivers of motor vehicles, especially motorcycles, and more specifically to a helmet in which the jaw structure of the helmet can change its position. Background technique [0002] Racing and motorcycle drivers must wear helmets to protect their heads. A typical helmet structure includes a helmet shell body, goggles, shields, and jaws. The goggles, shields, and jaws are all mounted on the helmet shell. On the main body, the function of the goggles is to protect people's eyes from sunlight and other strong light, the function of the shield is to prevent harmful particles such as sand and dust from intruding into the helmet, and the function of the jaw guard is to protect the human body when a collision occurs. Effectively protect the driver's chin and other parts. As we all know, traditional helmets with jaw guards are divided into two types: full helm...

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in the above-mentioned technical solution, mainly manifested in that the fork handle is provided with a through-slot slide rail that destroys the strength of the jaw guard, because the slide rail of the through groove not only weakens the flexural modulus of the jaw guard, but also The trend of stress concentration is greatly aggravated, so the fork handle is very easy to break when an impact accident occurs; in addition, the distance between the movable nail and the fixed nail changes. When the helmet is in the two extreme positions of full helmet and half helmet, due to Due to the limitation of the structure, the distance between the movable nail and the fixed nail must be very close. At this time, the joint strength and strength of the jaw guard and the main body of the helmet shell are relatively weak.

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