JPH052571Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a ventilation device for a helmet.

[Prior Art] In order to ensure ventilation inside the helmet, it is well known that a helmet is provided with a ventilation device that opens and closes an inlet provided above the front part of the helmet. Normally, this device includes a cover that has a window hole that communicates with an inlet opened above the front of the shell, and a shutter that slides to open and close the window hole.
The shutter is equipped with a knob that is integrally formed to protrude outward from the outer surface of the shutter.

[Problem to be solved by the invention] By the way, in the case of the above-mentioned structure, the cover and shutter are usually separate. However, in order to improve handleability, it is desirable to integrate the two in advance. Therefore, it is conceivable to integrate the shutter into slidable engagement with the cover. However, in this case, since the shutter is generally molded from resin, burrs are likely to occur, especially at the ends of the slide portion, and therefore burrs must be removed after the shutter is molded, increasing the number of manufacturing steps.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a helmet ventilation device that is slidable and that reduces deburring operations.

[Means for Solving the Problems] In order to solve the above problems, the ventilation device for a helmet according to the present invention bites into the base side of a knob integrally formed to protrude outward from the outer surface of the shutter, The present invention is characterized in that a slide groove is formed in which the edge of a window hole opened in the cover engages, and notches are provided in both ends of the slide groove.

[Operation of the invention] Since the slide groove that engages with the opposing edges formed in the window hole of the cover is formed by biting into the base side of the shutter knob, the shutter is engaged and integrated with the cover, and the window hole is engaged with the slide groove. Slide the hole open and close.

At this time, both ends of the slide groove formed on the shutter are dug and become notches, so even if burrs occur at the end of the slide groove, there is no chance of it coming into contact with the edge of the window hole. This reduces the amount of noise and does not affect slide operation much.

[Embodiment] An embodiment of the present invention is shown in FIGS. 1 to 9.
The full-face helmet 1 shown in FIG.
A shield 3 that opens and closes a window hole formed on the front surface of the shell 2 is pivoted within a shield cover 4 on the side surface of the shell 2. An upper ventilation device 5 is provided above the window hole of the shell 2, and a lower ventilation device 7 is also provided at the front of the lower chin guard 6, and outlets 8 are provided at the sides and rear.
and 9 are provided.

Fig. 2 shows a side surface of the helmet 1 partially cut away, with reference numeral 10 showing an opened inlet, 11 a liner, 12 a ventilation hole passing through the liner 11 and communicating with the inlet 10, and 13 a chin guard liner. .

3 and 4 show the front and back sides of the upper ventilation device 5, respectively, and FIG. 5 shows the disassembled and assembled state of the upper ventilation device 5. The upper ventilation device 5 consists of a cover 14 and a shutter 15.

The cover 14 is a resin plate that covers the inlet 1.
A window hole 16 communicating with 0 is opened, and opposing thin edges 17a and 17b extend above and below the periphery of the window hole 16, as shown in FIG. Click grooves 18a to 18c are formed in the upper part (see FIG. 5). Of these, the click groove 18a is in the closed position, and the click groove 1 is in the closed position.
8b is in charge of the intermediate position, and click groove 18c is in charge of the open position. Reference numeral 19 denotes a heat crimping attachment boss integrally formed on the back surface of the cover 14.

The shutter 15 is a resin plate having an area large enough to completely close the window hole 16, and has a knob 2 at the center end, as shown in detail in FIGS. 7 and 8.
0 is integrally formed to protrude, and an engagement protrusion 22 that can be engaged with 18 is protruded from approximately the center of the upper edge portion 21 . Further, a horizontally elongated groove 23 is formed along the upper edge 21, and both ends thereof form downwardly curved curved portions 23a and 23b, which relieve stress concentration caused by engagement and disengagement of the engagement protrusion 22. This helps to make the wall thickness of the engagement protrusion 21 uniform and thin, thereby making the engagement protrusion 22 operate smoothly. Also, horizontal groove 2
3 bites into the base of the knob 20 to form a slide groove 24. Both ends of the slide groove 24 form a notch 25 cut downward to curve downward, and are formed so as to frame the periphery of the knob 20, as shown in FIG. Therefore, the middle portion of the slide groove 24 forms a sliding contact portion with the edge portion 17a parallel to the upper end edge portion 21, and both end portions form non-contact portions.

FIG. 9 shows a part of the mold structure when molding the shutter 15, and shows the combined mold 28a and 2.
A cavity 29a corresponding to the side edge of the shutter 15, a mold surface contact portion 29b for forming the notch 25, and a cavity 29c corresponding to the knob 20 are formed between the holes 8b, respectively. In this way, when molding the shutter 15,
The mating dies 28a and 28b are in contact with each other on the die surface 29b.
Since the cut portion 25 can be formed by direct contact with the cut portion 25, it is possible to significantly reduce the occurrence of burrs during molding of this portion, and even if burr is generated along the cut portion 25, this portion will be removed from the edge 17a.
Since it is a non-contact part, deburring work after molding can be omitted.

A slide groove 26 into which the lower edge 17b of the window hole 16 fits is also formed in the lower part of the knob 20 by a cut from the lower edge 27 of the shutter 15.

Next, the attachment of the shutter 15 to the cover 14 will be explained. First, as shown in FIG. 5, the knob 20 of the shutter 15 is fitted into the window hole 16 from the back side of the cover 14.
a and 17b into the slide grooves 24 and 26 (see FIG. 8). Thereby, the cover 14 and the shutter 15 are integrated to form the upper ventilation device 5 in the form of a small assembly that is convenient to handle.

Furthermore, by passing the mounting boss 19 through a mounting hole (not shown) previously formed in the shell 2 and heat-staking it, the upper ventilation device 5 is fixed onto the inlet 10 on the surface of the shell 2.

Since the shutter 15 of the upper ventilation device 5 is slidable in the left and right directions with respect to the cover 14, the window hole 16 can be opened and closed. In other words, FIG. 3 shows the fully closed state, and the shutter 1
5 is located closest to the center of the cover 14, the engaging protrusion 22 engages with the click groove 18a, and the window hole 1
6 is fully closed by the shutter 15. window hole 16
To release the shutter, push the knob 20 of the shutter 15 outward with your fingertip. Then, the shutter 15 moves between the upper and lower edges 17a, 17b and the slide grooves 24 and 26.
The engaging protrusion 22 slides when engaged with the engaging protrusion 22.
When it engages with the click groove 18b, it becomes a half-open state, and when it slides further and engages with the click groove 18c, it becomes a fully open state. At this time, the presence of the horizontally elongated groove 23 facilitates elastic deformation of the engaging protrusion 22 portion, thereby smoothing the operation of the click mechanism.

[Effects of the invention] The ventilation device for a helmet according to the invention cuts into the base side of the knob integrally formed outwardly projecting from the outer surface of the shutter, so that the opening in the cover is opposed to the knob. In addition to forming a slide groove where the edges engage, we also provided notches dug into both ends of the slide groove, so the shutter can be integrated into the cover in advance so that it can be slid open and closed, making it easier to handle during assembly. will improve. Furthermore, since the end of the slide groove is made non-contact with the edge of the window hole by the notch, deburring work after molding the shutter can be reduced, making it suitable for mass production.

[Brief description of the drawings]

1 to 9 show embodiments, FIG. 1 is a perspective view of the helmet, FIG. 2 is a full sectional view, FIG. 3 is a plan view of the main parts, FIG. 4 is a back view, and FIG. The figure is an assembled view, FIGS. 6 to 8 are sectional views of main parts, and FIG. 9 is a partial sectional view showing the mold structure when molding the part corresponding to the line - in FIG. 7. Explanation of symbols, 1... Helmet, 2... Shell, 5... Upper ventilation device, 14...
Cover, 15...Shutter, 16...Window hole, 1
7a...Edge, 17b...Edge, 18a, 18
b, 18c...Click groove, 20...Knob, 24
...Slide groove, 25...Notch, 26...
slide groove.

Claims (1)

[Scope of utility model registration request] The cover has a window hole that communicates with the inlet opened at the upper front of the shell, a shutter that slides to open and close the window hole, and a knob integrally formed outward from the outer surface of the shutter. A helmet characterized in that a slide groove is formed into the base side of the knob and engages with an edge of the window hole, and a notch is provided at both ends of the slide groove. Ventilation equipment.