JPS59125902A - Helmet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a helmet, and more particularly to a helmet equipped with a mechanism capable of preventing a riding safety helmet from floating up.

Generally, riding safety helmets, especially full-face helmets, have an aerodynamic problem in that the helmet lifts up when driving at high speeds.

This is because when you ride while wearing a helmet, the wind equal to the speed you are riding hits the helmet from the front, and the air that hits the front of the helmet is divided into upper and lower parts, but the upper part has a smooth curved surface. whereas it flows along
The flow must flow downward while avoiding obstacles such as the neck.

Therefore, there is a large difference in air flow velocity between the upper and lower sides of the helmet.

That is, the flow velocity of air increases when it passes through the upper surface of the helmet, which has a large degree of curvature, and decreases when it passes under the helmet, where there are obstacles or the like.

According to Bernoulli's theorem, as the flow velocity increases, the pressure decreases, and as the flow velocity increases, the pressure increases.

For this reason, the pressure above the helmet is smaller than atmospheric pressure.
The tab creates negative pressure that sucks up the helmet, and the pressure on the underside of the helmet is greater than atmospheric pressure, which creates positive tab pressure that pushes up the helmet, and both actions combine to create an upward lifting force.

In other words, the helmet lifts up and the neck is pulled upward.

As an anti-liquid to prevent this hermenobutton from rising,
Protrusions that change the flow of air can be provided on the outer surface of the helmet above the rear of the helmet, but the outer surface of the helmet must be smooth from a safety standpoint, and a protrusion that changes the flow of air should be provided. This is extremely dangerous if you fall and receive a shock.

In addition, the air flow on the surface of the helmet depends on riding posture,
It also varies depending on the type of motorcycle you ride, especially if it has a fairing.

Therefore, protrusions for aerodynamic countermeasures such as those provided on the above-mentioned premise may also have an adverse effect in some cases, so it is necessary to actively change the air flow on the outer surface of the cap body. Permanently providing a protrusion with such a shape is not only desirable in terms of impact resistance and safety.

The inventor of the present invention has researched and devised the invention in view of the above-mentioned circumstances, and has installed a rectifier plate made of a thin-walled soft synthetic resin molded product on the outer surface of the helmet body (cap body), which consists of a series of smooth curved surfaces. To provide a helmet that is detachable and is attached with attachment means that can be easily removed when receiving a large impact, thereby preventing the helmet from floating without causing any safety problems.

The helmet of the present invention that achieves such an object has an arcuate planar shape on the outer circumferential surface of the helmet body from the upper part of the rear part to the other side part, and from both sides of the arcuate part to the center. A rectifying plate having a substantially mountain-shaped bulge that gradually projects outward as it reaches the lower part is removably attached by a simple mounting means, and the rectifying plate is made of a thin-walled molded product of soft synthetic resin. This is a summary.

The shape of the helmet body in the helmet of the present invention is not limited to a full-face shape, but may also be a jet shape or a semi-jet shape.

A baffle plate attached to the helmet body separates the air flow on the upper side of the helmet from the rear upper surface of the helmet body, so that the air flow on the lower side is drawn in by suction, increasing the flow velocity on the lower side, and separating the air flow on the upper side from the rear upper surface of the helmet body. Any shape is acceptable as long as it can reduce the difference in flow velocity with the lower side and suppress the lifting force acting on the helmet.

The shape for this purpose is that the planar shape is an arc, and a substantially mountain-shaped bulge is formed that gradually projects outward from both sides of the arc toward the center.

In addition, considering safety in the event of a fall or impact, the current plate must at least not cause any harm to humans even if it hits the body. Thin-walled molded products made of synthetic resin are optimal.

The means for attaching the above rectifying plate to the helmet body is as follows:
It suffices if it has a structure that allows it to easily come off in the event of an impact and prevents sliding on the surface of the helmet body.
The structure may be such that it is fixed to the helmet body using, for example, a plastic screw, and when an impact is received, the head of the screw flies off without resistance and the rectifying plate comes off.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings regarding a full-face helmet.

The first overhead view is a side view of a full-face helmet with a current plate attached to it, where (A) is the full-face helmet and (8) is the current plate.

Full-face type hermeso) main body (A) C, one piece (1) molded from FRP static material and polystyrene foam fitted inside the cap body (1), or has shock absorption performance equivalent to or better than this. Shock absorbing liner (2), chinstrap (3) and shock absorbing liner (2) formed of materials
It has a structure well known today, with attachments such as a side cushion (4) and a chin guard (5) attached to the inside of the body.
A window hole (6) provided in the front of the cap body (1) is closed by a transparent shield (7) rotatably attached to the outside of the cap body (1).

The current plate (B) is made of soft synthetic resin, such as nylon, urethane, ABS, polyethylene, etc., and has an arcuate planar shape, and is approximately in the shape of a mountain that gradually protrudes outward from both sides of the arc to the center. It is composed of a thin-walled molded product with a raised crest (8), and has through holes (9) for screwing at both arcuate sides, the center, and near the top edge.

The setscrews that attach the current plate (B) to the helmet body (A) are made of synthetic resin so that the head is easily damaged when subjected to impact.

In addition, when the above-mentioned rectifying plate (B) is attached to the helmet body (A) by gradually reducing the wall thickness of its peripheral edge, the curved surface continues continuously without any difference in level from the surface of the helmet body (A). This will reduce air resistance and be more effective.

The current plate (B) configured as above is the helmet body (C)
It is fixed with a set screw) at a position that passes from one part of the rear part to the other side.

As a result, the air flow on the upper side of the helmet is separated from the outer surface of the helmet by the upper surface (8a) of the bulge (8) of the baffle plate (B), and the flow velocity on the lower side increases due to the suction effect thereby. The difference in flow velocity between the upper and lower sides is reduced, the lifting force is reduced, and the phenomenon of the helmet lifting up is eliminated.

Since the helmet according to the present invention has the configuration described in detail above, the flow of air on the upper side of the helmet is changed by the baffle plate, the difference in flow velocity between the upper side and the lower side is reduced, and the lift force is reduced. do.

Therefore, when driving at high speeds, the helmet can be prevented from lifting up and can be kept in a stable state of being worn.

Moreover, since the rectifying plate is a thin-walled molded product of 41:1 synthetic resin, even if it were to hit the body, there would be no danger of harm to the body.

Furthermore, since the current plate is removably attached to the helmet using a simple attachment means, when an impact occurs, the current plate and the screws holding it will come off from the helmet, preventing them from slipping on the helmet flow surface. There is no such thing as being done.

Therefore, the safety pillar can also be used sufficiently.

Furthermore, since the regular 3FF board has a substantially mountain-shaped bulge, it is possible to add a three-dimensional accent to the outer surface of the helmet.

Therefore, the visual effect can be greatly increased compared to the conventional planar design which is achieved by using stickers, Hermek 1, coloring on the surface, etc.

Further, since the current plate is detachable from the helmet, it can be attached or detached depending on the driving situation.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and the Ml drawing is a side view and the second
The figure is a vertical side view, and FIG. 3 is a perspective view showing the current plate. In the figure (A): Helmet body (B): Current plate (8):
Bulging part of current plate

Claims (1)

[Claims] The outer circumferential surface of the helmet body from one side to the upper rear part to the other side has an arcuate planar shape, and is approximately in the shape of a mountain that gradually protrudes outward from both arcuate sides to the center. A helmet in which a rectifier plate having a bulge formed therein is removably attached by a simple attachment means, and the rectifier plate is a thin-walled molded product of soft synthetic resin.