JPH0673604A - Mechanism for opening and closing shield of helmet - Google Patents

Abstract

PURPOSE:To provide a mechanism for opening and closing the shield of a helmet and capable of reducing the size of the helmet by reducing the radial dimension of the mechanism. CONSTITUTION:A checking claw 26 is integrally formed on a guide protrusion 21 of a base 20. Since the checking claw 26 is integrally formed on the guide protrusion 21, the radial dimensions of the base and a compact holder 30 are decreased to enable the reduction of the size of the shield-opening and closing mechanism 10. The checking claw 26 passes through a guide groove 31 and, accordingly, it is not necessary to form a circular groove in addition to the guide groove 31 on the shield holder 30 in contrast with conventional helmet. The manufacture steps of the shield holder 30 can be decreased and the lowering of the rigidity of the helmet can be prevented by this structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield opening / closing mechanism for a helmet in which a front opening is covered with an openable / closable shield.

[0002]

2. Description of the Related Art Conventionally, as a helmet worn when riding on a motorcycle or the like, a helmet in which a front opening of the main body is covered with a transparent shield in order to protect the rider's face from wind and rain and dust during traveling. Are known.

By the way, the shield is attached to the main body of the helmet so as to be openable and closable. As an opening / closing mechanism of the shield, for example, a base that is bound to both sides of the main body of the helmet and a shield that covers the front opening of the main body of the helmet are used. A shield holder that rotatably attaches both ends of the shield to the base and a cover that engages with the shield holder, and a guide projecting from the base in an arc-shaped guide groove formed in the shield holder. There is known one in which a protrusion is engaged to give a click feeling to the opening / closing movement of the shield (Japanese Patent Application No. 2-30923).
(See No. 8).

[0004]

In the above-mentioned conventional shield opening / closing mechanism, when the shield is opened / closed, the shield holder for holding the shield rotates about its pivot point with respect to the base. A locking claw for preventing it was provided on the base side.

However, since the locking claws are provided separately from the guide protrusions of the base and are also provided at the ends of the base in the lengthwise direction (outside the guide protrusions), the length dimensions of the base and the shield holder ( The radial dimension) became large, which hindered the compactness of the shield opening / closing mechanism. In addition, it is necessary to provide the shield holder with an arc-shaped groove through which the locking claw should pass, separately from the guide groove.
There is also a problem that the number of processing steps increases and the rigidity of the shield holder decreases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a shield opening / closing mechanism for a helmet which can be made compact by reducing the radial dimension.

[0007]

In order to achieve the above-mentioned object, the present invention rotates a base that is bound to both sides of a helmet body and both ends of a shield that covers a front opening of the helmet body, to the base. A shield holder that is freely attached and a cover that engages with the shield holder are configured to be included. In a shield opening / closing mechanism for a helmet which is provided with a click feeling in opening / closing, the retaining projection of the shield holder is integrally formed with the guide protrusion.

[0008]

According to the present invention, since the shield holder retaining hooks provided on the base are formed integrally with the guide projections, the lengthwise dimension (radial dimension) of the base and the shield holder is reduced. The shield opening / closing mechanism can be made compact.

Further, since the locking claw penetrates the guide groove formed in the shield holder, it is not necessary to form an arc-shaped groove for penetrating the locking claw separately from the guide groove in the shield holder as in the conventional case. Reduction of man-hours for processing the shield holder,
It is possible to prevent the rigidity from decreasing.

[0010]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of a shield opening / closing mechanism according to the present invention, FIG. 2 is a front view of a base, and FIG. 3 is AA of FIG.
Line sectional view, FIG. 4 is a front view of the shield holder, FIG. 5 is a sectional view taken along line BB of FIG. 4, FIG. 6 is a sectional view taken along line CC of FIG. 4, FIG. 7 is a rear view of the cover, and FIG. 7 is a sectional view taken along the line D-D of FIG. 7, FIG. 9 is a front sectional view of the shield opening / closing mechanism showing a state when the shield is fully opened, FIG. 10 is a front sectional view of the shield opening / closing mechanism showing a state when the shield is fully closed, and FIG. It is an enlarged detailed view of a stopper part.

The helmet 1 according to this embodiment is of a so-called full-face type, the main body 2 of which is integrally molded of plastic such as FRP and the front opening 3 thereof is made of transparent resin and can be opened and closed. It is covered by a transparent shield 4.

Both ends of the shield 4 are rotatably attached to both sides of the helmet body 2 by the shield opening / closing mechanism 10 according to the present invention.

The structure of the shield opening / closing mechanism 10 according to the present invention will be described in detail. Although the shield opening / closing mechanism 10 is provided on both sides of the helmet body 2, only one configuration will be described here.

The shield opening / closing mechanism 10 is composed of a base 20 attached to the side of the helmet body 2 and a shield holder 30 attached to the end of the shield 4 and pivotably attached to the base 20. And a cover 40 that engages with the shield holder 30 and covers the shield holder 30 and the base 20 from the outside.
0, the shield holder 30 and the cover 40 are all integrally molded of resin.

As shown in detail in FIGS. 2 and 3, the base 20 is formed into a substantially oval shape, and a semi-cylindrical guide protrusion 21 and a cylindrical boss 22 are provided at both ends in the longitudinal direction thereof. The protrusions are integrally formed, and screw holes 23 and 24 are formed in the central portions thereof. A small-diameter cylindrical stopper protrusion 25 is provided in the vicinity of the guide protrusion 21 of the base 20.

By the way, in the present embodiment, the locking claw 26 for preventing the shield holder 30 from coming off is integrally formed on the upper end of the guide projection 21, and the boss 22 is formed.
The same three locking claws 27 are provided at the upper end of the same angle pitch (1
They are integrally formed at a 20 ° pitch.

As shown in detail in FIGS. 4 to 6, the shield holder 30 is provided with an arcuate guide groove 31 and a hole 32 to be fitted into the boss 22 of the base 20. The groove 31 is formed with four arcuate recesses 31a, 31b, 31c, 31d and a notch 31e into which the guide protrusion 21 of the base 20 should be fitted stepwise by the opening / closing movement of the shield 4. A stopper claw 31f is provided between the recess 31a and the cutout 31e. Further, in the hole 32, three notches 32a through which the three locking claws 27 formed integrally with the boss 22 of the base 20 should pass are formed at an equal angular pitch (120 ° pitch).

By the way, in this embodiment, the end portion of the guide groove 31 of the shield holder 30 (the concave portion 31).
A notched circular stopper groove 33 into which the stopper projection 25 provided on the base 20 when the shield 4 is fully closed is to be fitted is formed at the end portion adjacent to d). Two circular holes 34 are formed in the vicinity of to reduce the rigidity of this portion and allow a slight deformation. A similar arcuate groove 35 is formed near the guide groove 31.

Further, screw holes 36 are formed in the upper and lower portions of the front side portion (side portion where the shield 4 is attached) of the shield holder 30, and a U-shaped engaging groove 37 is formed in the rear side portion. Has been formed. Also, the same shield holder 3
A notch groove 38 is formed in the upper portion of 0, and a locking step portion 38a is formed in a part of the notch groove 38. The lower portion has a spring-like shape that is bent and deformed upward by an upward pushing operation. The lock claw 39 is formed.

As shown in detail in FIG. 7 and FIG. 8, the cover 40 is formed in substantially the same shape as the shield holder 30, and the shield holder 30 is provided on the back side thereof.
Three engaging pieces 41, 42, 43 to be fitted to the outer peripheral edge of the shield holder 30 are integrally formed on the upper side and the rear side thereof (the left side portion in FIG. 7). Ribs 44 and 45 to be engaged with the stop portion 38a and the engagement groove 37
Are formed respectively.

A substantially rectangular notch 46 is formed in the lower portion of the cover 40, and an engaging projection 47 is formed in the vicinity of the notch 46.

Thus, the shield opening / closing mechanism 1 described above
The base 20, the shield holder 30, and the cover 40 that make up 0 are assembled in the following manner.

That is, as shown in FIG. 1, the base 20 is
Helmet body 2 and screw holes 23, 24 drilled in this
It is connected to the side portion of the helmet body 2 by screws 6 and 7 which are inserted into the screw holes 5 which are bored in and the cap nut 8 which is screwed into these screws 6 and 7.

On the other hand, the shield holder 30 is attached to the end portion of the shield 4 by the eyelet 11 (see FIG. 9) inserted through the hole 36 formed in the shield holder 30 and the hole 9 formed in the end portion of the shield 4. Has been done. In the shield holder 30, the notch 32a of the hole 32 formed in the shield holder 30 is aligned with the position of the locking claw 27 formed in the boss 22 of the base 20, and the boss 22 is passed through the hole 32. By rotating the shield holder 30 as a whole with the locking claw 26 facing the notch 31e, the locking claw 26 rides over the stopper claw 31f and fits on the back surface of the shield holder 30. At this time, the shield holder 30 is prevented from coming off by the action of the locking claws 26 and 27, and is rotated around the boss 22 together with the shield 4, whereby the shield 4 opens and closes the front opening 3 of the helmet body 2. To do.

Thus, as described above, the seat holder 30
When the base 20 is pivotally attached to the base 20, the guide protrusion 21 of the base 20 is attached to the guide groove 31 of the shield holder 30.
It fits in any of the arcuate concave portions 31a to 31d.

Finally, when the cover 40 is attached to the sheet holder 30, a series of assembling work is completed. That is, in the cover 40, the engaging pieces 41, 42, 43 are fitted to the outer peripheral edge of the shield holder 30 and slid from the rear (rightward in FIG. 9) to the front (leftward in FIG. 9), As shown in FIG. 9, the ribs 44 and 45 engage with the locking step portion 38a and the engaging groove 37 of the shield holder 30, respectively, and at the same time, the lock claw 39 of the shield holder 30 engages with the engaging protrusion 47. The cover 40 is attached to the shield holder 30 to cover the shield holder 30 and the base 20 from the outside.

When the cover 40 is attached, the lock claw 39 on the shield holder 30 side faces the notch 46 of the cover as shown in FIG. 9, and the lock claw 39 is located in the notch 46. It does not project into the outside of the cover 40 after it is stored.

Then, as shown in FIG. 9, the guide protrusion 21 of the base 20 is aligned with the guide groove 31 of the shield holder 30.
In the state where the shield 4 is fitted in the concave portion 31a of the shield 4, the shield 4 is kept in a fully opened state. At this time, the locking claw 26 abuts on the stopper claw 31f of the shield holder 30, so that the shield 4 does not move further. .

Next, if the entire shield 4 is pushed down from the state shown in FIG. 9, the shield 4 and the shield holder 30
Rotates downward (counterclockwise) about the boss 22 of the base 20. At this time, the guide protrusion 21 is sequentially fitted into the concave portions 31b, 31c, 31d of the guide groove 31, and the opening degree of the shield 4 is switched between four stages from fully open to fully closed, and a clicking feeling is given to its opening / closing movement. To be done.

FIG. 10 is a view showing a state in which the shield 4 is fully closed, and at this time, the guide projection 21 is in the guide groove 3
At the same time as fitting into 1d, the stopper projection 25 of the base 20 fits into the stopper groove 33 having a narrowed inlet with resistance (see FIG. 11), so that the fully closed state of the shield 4 is reliably maintained, and 4 does not open easily.
The fitting of the stopper projection 25 into the stopper groove 33 is allowed by elastic deformation in the vicinity of the stopper groove 33 of the shield holder 30, but this elastic deformation is facilitated by the two circular holes 34.

In the above, in this embodiment, the base 20
Since the retaining claws 26 for preventing the shield holder 30 from being provided on the guide projection 21 are integrally formed with each other, the lengthwise dimension (radial dimension) of the base 20 and the shield holder 30 is reduced, and the shield opening / closing mechanism. 10 can be made compact.

Further, since the locking claw 26 penetrates the guide groove 31 formed in the shield holder 30, an arc-shaped groove for penetrating the locking claw is formed in the shield holder 30 separately from the guide groove 31 as in the conventional case. Therefore, it is possible to reduce the man-hours for processing the shield holder 30 and prevent the rigidity from decreasing.

Further, according to this embodiment, the lock claw 39 for detaching and attaching the cover 40 is formed in the cover 40 by the notch portion 4.
It is stored in 6 and does not protrude outside the cover 40,
The appearance of the helmet 1 is enhanced and the lock claw 39 is not damaged.

In order to remove the cover 40, the lock claw 39 facing the notch 46 of the cover is pushed up to
After releasing the engagement of the lock claw 39 with the engagement protrusion 47,
The entire cover 40 may be pulled out rearward (rightward in FIG. 9).

[0036]

As is apparent from the above description, according to the present invention, the bases attached to both sides of the helmet body,
A shield holder that rotatably attaches both ends of the shield covering the front opening of the helmet body to the base,
It is configured to include a cover that engages with the shield holder, and a guide protrusion protruding from the base is engaged with an arc-shaped guide groove formed in the shield holder to give a click feeling to the opening / closing movement of the shield. In the shield opening / closing mechanism of the helmet, the retaining projections of the shield holder are integrally formed on the guide protrusion, so that the radial dimension of the shield opening / closing mechanism can be reduced to be compact. The effect is obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a shield opening / closing mechanism according to the present invention.

FIG. 2 is a front view of a base.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a front view of a shield holder.

5 is a sectional view taken along line BB of FIG.

6 is a cross-sectional view taken along the line CC of FIG.

FIG. 7 is a rear view of the cover.

8 is a cross-sectional view taken along the line DD of FIG.

FIG. 9 is a front sectional view of the shield opening / closing mechanism showing a state when the shield is fully opened.

FIG. 10 is a front sectional view of the shield opening / closing mechanism showing a state when the shield is fully closed.

FIG. 11 is an enlarged detailed view of a stopper portion.

[Explanation of symbols]

 1 Helmet 2 Helmet Main Body 3 Front Opening 4 Shield 10 Shield Opening / Closing Mechanism 20 Base 21 Guide Protrusion 26 Locking Claw 30 Shield Holder 31 Guide Groove 39 Lock Claw 40 Cover 46 Cover Notch

Claims (1)

[Claims] 1. A base that is attached to both sides of a helmet body, a shield holder that rotatably attaches both ends of a shield that covers a front opening of the helmet body to the base, and that engages with the shield holder. A shield of a helmet configured to include a cover, and a guide projection protruding from the base is engaged with an arc-shaped guide groove formed in the shield holder to give a click feeling to the opening / closing movement of the shield. In the opening / closing mechanism, the shield opening / closing mechanism for a helmet is characterized in that the guide protrusion is integrally formed with a retaining claw for preventing the shield holder from coming off.