JPH0129209Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a ventilation structure for a helmet that ventilates the inside by discharging internal air from the head side.

(Prior art) Conventional helmets for bicycles or motorcycles introduce outside air into the helmet through the inner periphery of the helmet, and discharge the inside air on the head side together with the introduced outside air to the rear and outside of the helmet. There is something to ventilate the inside.

(Problems to be solved by the invention) When the conventional helmet is used in rainy weather, rainwater may enter through the outside air inlet and outlet and wet the user's head. When this happens, the cold air hits the user's head directly, causing the user's head to cool down too much, making it difficult to provide comfortable air.

Therefore, an object of the present invention is to provide a helmet that allows ventilation within the helmet without directly introducing outside air into the helmet.

(Means for Solving the Problems) The specific features of the present invention in order to achieve the above object are as follows: In this helmet ventilation structure, an outside air flow passage 5 is formed on the outer periphery of the helmet 1 to open in the front direction and introduce outside air from the front and exhaust it to the rear. The flow path 8 is in communication with the outside air flow path 5 so that inside air is sucked by the outside air flow flowing through the outside air flow path 5.

(Function) Outside air flow passage 5 formed on the outer periphery of the helmet 1
When outside air is introduced from the front and discharged to the rear, the pressure inside the outside air flow passage 5 decreases, and the pressure inside the outside air flow passage 5 and the inside air flow passage 8 communicating with the outside air flow passage 5 decrease. A pressure gradient is generated due to the pressure difference between the head and the inside air, and the inside air on the head side is sucked into the outside airflow flowing through the outside airflow path 5 through the inside airflow path 8, and is discharged to the rear and outside of the helmet 1. Thus, the inside of the helmet 1 can be ventilated without directly introducing outside air into the helmet 1.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Figures 1 to 3 show a first embodiment, in which 1 is a helmet worn by a two-wheeler driver, which has an opening 13 in the front lower part for the rider to wear, and is made of metal or synthetic resin. An outer shell 2, a cushioning material 3 such as foamed synthetic resin attached to the inner surface of the outer shell 2, and an opening 1.
The windshield 4 and the like are made of a material such as a transparent synthetic resin and are closed on the front side of the windshield 3 so as to be openable and closable.

A cylindrical external air flow passage 6 is fixed to the outer surface of the outer shell 2 of the helmet 1. The outside airflow passage 6 is formed from a material such as metal or synthetic resin, and has an outer wall 6.
A, a side wall 6b, and an inner wall 6c are formed to have a rectangular cross section, and the inside thereof is an outside airflow passage 5 that introduces outside air from the front and discharges it to the rear. Also,
The outside air circulation pipe 6 is provided along the outer surface of the outer shell 2 from the front part to the lower part of the rear part, and the front end is provided with an inlet port 14 that opens in the front direction, and the rear end is bent to protrude in the rear direction. A discharge port 7 is formed, and an end 7a of the discharge port 7 opens rearward. Furthermore, the cross-sectional area of the outside air flow pipe 6 is gradually narrowed from the front part to the rear part.

The cross-sectional shape of the outside air flow pipe 6 may be circular, elliptical, or polygonal, and the outer shell 2 may also serve as the inner wall 6c of the outside air flow pipe 6.

An internal air flow pipe 9 is provided on the inner surface of the cushioning material 3 of the helmet 1. The inside air flow pipe 9 is made of a material such as synthetic resin, and has an outer wall 9a and a side wall 9.
b and an inner wall 9c, it is formed into a rectangular cross section,
The interior thereof is an internal airflow passage 8 through which internal air from the head side flows. In addition, the inner wall 9c of the inside air flow pipe 9
A plurality of circulation holes 10 are formed in the inner airflow passage 8 for circulating the inner air on the head side. Further, the inside air flow pipe 9 is formed so as to gradually contract from the front to the rear along the inner surface of the helmet 1, and forms a communication passage 11 that communicates the inside air flow passage 8 and the outside air flow passage 5 at the rear end. It is connected to a cylindrical communication path 12. The communication passage 12 is formed in a substantially U-shape that bypasses the lower rear end of the helmet 1, and the rear part of the communication pipe 12 is located within the outlet 7 of the outside air flow pipe 6, and the outer periphery and the inner part of the outlet 7 are connected to each other. A gap 15 is formed between the periphery and the periphery to allow the outside air to flow. Also,
A rear end 12a of the communication pipe 12 is open in the rear direction, and the rear end 12a is located inside the end 7a of the discharge port 7.

Note that a member such as breathable cloth may be used instead of the inner wall 9c of the inside air flow pipe 9, and the inner wall 9c may be omitted. Further, the outer wall 9a of the inside air flow pipe 9 may also be used as the inner surface of the cushioning material 3.

In the configuration of the first embodiment, the cross-sectional area of the outside air flow passage 5 is gradually narrowed from the front to the rear, and is the smallest at the part where the outlet 7 communicates with the communication passage 11. The speed of the outside airflow gradually increases from the front to the rear, reaching its maximum at the communicating area.

Therefore, the negative pressure that sucks the inside air becomes maximum at the communicating part, and the inside air is strongly sucked.

FIG. 5 shows a second embodiment, which differs from the first embodiment in that the outside air flow pipe 6 and the inside air flow pipe 9 are immersed in the cushioning material 3, and the communication pipe 12 is located at the rear of the inside air flow pipe 9. The point is that it passes through the helmet 1 and is inserted into the discharge port 7. The outside air flow pipe 6 is arranged along the inner surface of the outer shell 2, and the inlet 14 and the outlet 7 are arranged to protrude outside the outer shell 2 so as to introduce and discharge the outside air, and the inside air flow pipe 9 is arranged along the bottom wall. 9
The side surface of the head part c is substantially flush with the inner surface of the cushioning material 3, and is formed so as not to impair the function of the cushioning material 3. Note that the outer wall 6a of the outside air flow pipe 6 may also be used as the inner surface of the outer shell 2.

6 and 7 show a third embodiment, in which a pair of left and right outside air flow pipes 6 of the first embodiment are provided from both left and right sides of the helmet 1 to the rear, and are joined at the rear. The outside air flow pipe 6 may also be formed on the inner surface of the outer shell 2 as in the second embodiment.

Note that the present invention is not limited to the above-described embodiment, and the outside air flow passage 5 may be formed by integrally molding the outer shell 2 or by excavating the cushioning material 3 instead of the outside air flow pipe 6. (The outer periphery refers to the inner and outer surfaces of the outer shell or the outer shell and the cushioning material itself) and is isolated from the inside of the helmet 1. Further, the internal airflow passage 8 may be formed by excavating the cushioning material 3, and it is sufficient if it is formed on the inner periphery of the helmet 1 (inner periphery refers to the inner surface and inside of the cushioning material). Furthermore, as shown in each embodiment, if the communication pipe 12 is inserted into the outlet 7 and arranged along the outside air flow, the inside air suction effect will be performed most efficiently, which is preferable. It is sufficient to just communicate with the middle part of the flow path 5, and even in that case, the effect of suctioning the inside air by the outside air flow can be sufficiently exerted.

(Effects of the invention) The present invention forms an outside air flow passage 5 on the outer periphery of the helmet 1 that opens at the front and introduces outside air from the front and exhausts it to the rear. An inside air flow passage 8 through which inside air circulates,
By communicating with the outside air flow passage 5 in order to suck inside air by the outside air flow circulating inside the outside air flow passage 5,
Since the inside of the helmet 1 can be ventilated without introducing outside air directly into the helmet 1, comfortable ventilation can be achieved without rain water entering during rainy days and without directly cooling the head with cold air in winter. I can figure it out.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention;
Figures 2 and 3 are perspective views of the same, Figure 4 is a perspective view of the outside air flow pipe and the inside air flow pipe, Figure 5 is a longitudinal sectional view showing the second embodiment, and Figure 6 is the third embodiment. FIG. 7 is a cross-sectional view of the same. DESCRIPTION OF SYMBOLS 1... Helmet, 2... Outer shell, 5... Outside air flow passage, 6... Outside air flow pipe, 8... Inside air flow passage, 9
... Internal air circulation pipe, 11 ... Communication passage, 12 ... Communication pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] In a helmet ventilation structure in which an internal air flow passage 8 is formed on the inner periphery of the helmet 1 for discharging internal air on the head side to the rear and outside of the helmet 1, An outside airflow passage 5 is formed that opens to introduce outside air from the front and discharge it to the rear. A helmet ventilation structure characterized by communicating with an outside airflow passage 5.