JPH07207511A - Helmet shield pivot mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the construction of a helmet and to facilitate its molding. [Structure] A shaft portion 23 for allowing the shield 6 to rotate up and down, and an annular portion 2 rotatably fitted on the shaft portion 23.
7 and 7. A slit 29 is formed by dividing a part of the annular portion 27 in the circumferential direction. The inner hole 28 of the annular portion 27 can be enlarged by the elastic deformation of the annular portion 27 accompanying the expansion of the slit 29. A locking protrusion 36 is formed on either one of the outer peripheral surface of the shaft portion 23 and the inner peripheral surface of the annular portion 27, and the engaging protrusion 36 is formed on the other surface by relative rotation of the shaft portion 23 and the annular portion 27. A first locking recess 37 and a second locking recess 38 are formed that engage with the stop projection 36 in a detachable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helmet worn by an occupant of a motorcycle or the like, and more particularly to a shield pivot support mechanism for a helmet that pivotally supports a shield on a helmet body in a vertically rotatable manner.

[0002]

2. Description of the Related Art Conventionally, as a shield pivot support mechanism for a helmet, there is one disclosed in Japanese Utility Model Laid-Open No. 2-118723.

According to this, a shield for opening and closing the front opening of the helmet body is provided, and the shield is pivotally supported on the helmet body so as to be vertically rotatable.

Further, there is provided a holding means for holding the shield at a predetermined upper and lower position.

[0005]

By the way, in the above-mentioned conventional pivoting mechanism, the means for allowing the shield to rotate up and down and the holding means for holding the shield at the upper and lower predetermined positions are provided separately from each other. Therefore, there is a problem that the number of parts is large and the construction of the helmet becomes complicated, and the molding of the helmet becomes complicated.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to simplify the construction of a helmet and to facilitate its molding.

[0007]

[Means for Solving the Problems] The present invention for achieving the above object is as follows.

This "means for solving the problem"
In the above paragraph, the terms in parentheses below correspond to the terms in the claims.

The shield pivot support mechanism of the helmet according to the present invention has a shaft portion 23 for allowing the shield 6 to rotate up and down.
And an annular portion 27 rotatably fitted to the shaft portion 23, a slit 29 is formed by dividing a part of the annular portion 27 in the circumferential direction, and the slit 29 is expanded. Due to elastic deformation of the annular portion 27 accompanied by
8 can be enlarged, and the outer peripheral surface of the shaft portion 23 and the annular portion 27
The locking projection 36 is formed on one of the inner peripheral surfaces of the
On the other surface, a first locking recess (locking recess) 37 and a second locking recess (engagement) that are releasably engaged with the locking projection 36 by relative rotation of the shaft portion 23 and the annular portion 27. A stop recess 38 is formed.

[0010]

[Operation] The operation of the above configuration is as follows.

In the "action" section, the terms in parentheses below correspond to the terms in the claims.

When the shield 6 is rotated to a predetermined lower position so as to close the opening 5 of the helmet 1, the shaft portion 23
And the annular portion 27 rotate relative to each other, the locking projection 36 and the first locking recess (locking recess) 37 are engaged, and the shield 6 is held in the predetermined position, that is, the shield 6 It is in a use state (shown by solid lines in FIGS. 1 and 2).

When the shield 6 is rotated upward to open the opening 5 from the above state in an attempt to rotate the shield 6 to a predetermined upper position, the locking projection 36 and the first locking recess ( The engagement with the locking recess 37 is the annular portion 2
The elastic member 7 is released with elastic deformation, and the inner hole 28 of the annular portion 27 expands (shown in FIG. 4). Therefore, the inner peripheral surface of the inner hole 28 and the tip of the locking projection 36 relatively slide, allowing relative rotation of the shaft portion 23 and the annular portion 27, and rotating the shield 6 upward. Is done.

When the shield 6 reaches the upper predetermined position, the locking projection 36 and the second locking recess (locking recess) 38 are engaged with each other to hold the shield 6 at that position, that is, The shield 6 is in the retracted state (phantom line in FIG. 2,
(See FIG. 5).

When the opening 5 is to be closed from the above state, the shield 6 may be rotated downward, and the operation at this time is similar to that at the time of upward rotation.

In the above case, the holding means 30 for holding the shield 6 in the predetermined vertical position, the slit 29, the locking projection 36, the first locking recess (locking recess) 37, and the second locking recess (engagement). The stop recess 38 is formed by using the shaft portion 23 and the annular portion 27 that pivotally support the shield 6 on the helmet body 2.

Therefore, since the shaft portion 23 and the annular portion 27 are used for molding the holding means 30, the number of parts of the helmet 1 is reduced.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 in the drawing is a helmet, and for convenience of explanation, the following description will be given assuming that the direction of the arrow Fr in the drawing is the front. Further, since the left side portion and the right side portion of the helmet 1 are bilaterally symmetrical, the left side portion will be mainly described, and the right side portion will not be described.

In FIG. 2, the helmet 1 is of a full-face type, and this helmet 1 has a helmet body 2, which is attached to the FRP shell 3 and the inner surface of the shell 3. The liner 4 is made of foam resin.

The helmet body 2 has an opening 5 on the front surface, which is a front open portion corresponding to the wearer's face, and a transparent resin shield 6 for opening and closing the opening 5 is provided. 7 is a belt.

1 to 3, the helmet 1 described above
Has a resin substrate 9 provided along the outer surface of each side of the helmet body 2. A pair of upper and lower bolt holes 10 and 11 are formed in the base plate 9, and a pair of upper and lower nuts 12 are embedded in the side portions of the helmet body 2 corresponding to the bolt holes 10 and 11, respectively. The board 9 is detachably attached to the outer surface of the helmet body 2 by screwing the bolts 14 and 15 inserted into the bolt holes 10 and 11 into the nuts 12. Each of the bolts 14 and 15 has a threaded portion 14a, 1
5a and heads 14b and 15b, and recesses 16 and 17 into which the heads 14b and 15b are fitted are formed on the outer surface of the substrate 9.

The shield 6 comprises a shield front portion 19 which covers the opening 5 from the front, and shield side portions 20 and 20 which integrally extend rearward from the left and right ends of the shield front portion 19, respectively. The shield 6 is substantially U-shaped in plan view.

The helmet body 2 is provided with a pivot mechanism 22 for pivotally supporting the shield 6 in a vertically rotatable manner and for holding the shield 6 in a predetermined vertical position. The pivot mechanism 22 has a shaft portion 23 having a circular cross section integrally formed on the inner surface of the substrate 9. The shaft portion 23 has a shaft center 23a extending leftward and rightward and coaxially with the upper bolt hole 10. It is provided in. A rib 24 is integrally projectingly provided on the lower edge of the inner surface of the substrate 9, and the rib 24 and the projecting ends of the shaft portion 23 are respectively attached to the outside of the helmet body 2 by the fastening force of the bolts 14 and 15. It is pressed against the side surface, whereby a thin space 25 is formed between the outer surface of the helmet body 2 and the substrate 9.

A circular annular portion 27 is integrally formed at the rear end of the shield side portion 20. In the space 25, the inner hole 28 of the annular portion 27 is removably fitted to the shaft portion 23 so that the annular portion 27 is rotatable with respect to the shaft portion 23 around its axis 23a. It is fitted on. That is, with this rotation, the shield 6 is rotatable up and down around the shaft center 23a.

A slit 29 is formed by dividing a lower portion of the annular portion 27, which is a portion in the circumferential direction. The inner hole 28 of the annular portion 27 can be enlarged by the elastic deformation of the annular portion 27 accompanying the expansion of the slit 29. Further, the annular portion 27 has a pair of holes 27a, 27a.
These holes 27a enable the elastic deformation of the annular portion 27 with a small external force.

A holding means 30 for holding the shield 6 in a predetermined upper and lower position is provided.

The holding means 30 will be described. A stopper projection 31 is integrally formed on the outer peripheral surface of the shaft portion 23. On the other hand, on the inner peripheral surface of the inner hole 28, the shaft center 23a is formed.
An arcuate notch 32 centered on is formed. The notch 32 is formed across both edges of the slit 29, and the stopper projection 31 is fitted in the notch 32.

A front edge of the notch 32 in the circumferential direction is a front stopper surface 33, and a rear edge thereof is a rear stopper surface 34. When the shield 6 is rotated, if either of the front and rear stopper surfaces 33, 34 that rotates with it comes into contact with the stopper projection 31, the shield 6 is at a predetermined lower position or more. Downward rotation is prevented, and upward rotation above a predetermined upper position is also prevented.

On the outer peripheral surface of the shaft portion 23, a pair of locking projections 36, 36 are integrally projected. Further, a pair of first locking recesses 3 are formed on the inner peripheral surface of the inner hole 28 of the annular portion 27.
7, 37 and a pair of second locking recesses 38, 38 are formed. The locking projection 36 and the first locking recess 37 are releasably engaged with each other by the relative rotation of the shaft portion 23 and the annular portion 27. Further, by the relative rotation of the shaft portion 23 and the annular portion 27, the locking projection 36 and the second locking recess 38 can be engaged and disengaged.

When the shield 6 is rotated downward to a predetermined lower position so as to close the opening 5, the annular portion 27 is rotated around the shaft portion 23 and the front stopper surface 3 is rotated.
3 comes into contact with the stopper projection 31 and further shield 6
Is prevented from rotating downward, the first locking recess 37 is engaged with the locking projection 36, and the shield 6 is held at the lower predetermined position. (See solid lines in FIGS. 1 and 2).

From the above state, when the shield 6 is rotated upward to open the opening 5 in order to rotate the shield 6 to a predetermined position on the upper side, the locking projection 36 and the first locking recess 37 are formed. Is disengaged with the elastic deformation of the annular portion 27, and the inner hole 28 of the annular portion 27 expands (shown in FIG. 4). Therefore, the inner peripheral surface of the inner hole 28 slides on the tip of the locking projection 36, the relative rotation of the shaft portion 23 and the annular portion 27 is allowed, and the shield 6 is rotated upward.

When the shield 6 reaches the upper predetermined position, the rear stopper surface 34 comes into contact with the stopper projection 31 to prevent the shield 6 from further rotating upward, and the second locking recess 38 is formed. By engaging the locking projection 36, the shield 6 is held at the predetermined position on the upper side, that is,
This shield 6 is in a stored state (phantom line in FIG. 2, FIG. 5).
(Shown).

In order to close the opening 5 from the above state, the shield 6 may be rotated downward, and the operation at this time is the same as that at the time of upward rotation.

Although the above is based on the illustrated example, the shaft portion 23
May be molded directly on the shell 3 of the helmet body 2.
Further, the shaft portion 23 is formed on the shield 6 and the annular portion 27 is formed.
May be formed into a plate shape and molded into the helmet body 2. Further, the first locking recess 37 and the second locking recess 38 may be formed on the outer peripheral surface of the shaft portion 23, and the locking protrusion 36 may be formed on the inner peripheral surface of the inner hole 28 of the annular portion 27. In addition, the first locking recess 3
Another locking recess may be formed between the second locking recess 7 and the second locking recess 38 to hold the shield 6 at the midway position of its vertical rotation. Further, the locking projections 36 may be provided more than the locking recesses. In addition, a cover plate may be provided to cover the substrate 9 from the outside in a detachable manner.

[0036]

According to the present invention, when the shaft portion for rotating the shield vertically and the annular portion rotatably fitted on the shaft portion are provided, the circumference of the annular portion can be reduced. A slit is formed by dividing a part of the direction, and the inner hole of the annular portion can be enlarged by elastic deformation of the annular portion accompanied by the expansion of the slit, and the outer peripheral surface of the shaft portion and the inner periphery of the annular portion. A locking projection is formed on one of the surfaces, and a locking recess is formed on the other surface that engages and disengages with the locking projection by relative rotation of the shaft portion and the annular portion. is there.

Therefore, when the shield is rotated so as to close or open the opening of the helmet, the shaft portion and the annular portion relatively rotate and the locking projection and the locking recess are engaged with each other. , The shield is held at a predetermined upper and lower position.

Therefore, the slits, the locking projections, and the locking recesses, which are holding means for holding the shield in the upper and lower predetermined positions, are formed by using the shaft portion and the annular portion that pivotally support the shield on the helmet body. Is.

Therefore, since the number of parts of the helmet is reduced accordingly, the construction of this helmet is simplified.

Further, as described above, since the holding means is composed of the slit, the locking projection and the locking recess having a simple structure, there is also an effect that the helmet can be easily molded.

[Brief description of drawings]

1 is a partially enlarged partial sectional view of FIG.

FIG. 2 is an overall left side view.

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

FIG. 4 is an enlarged operation explanatory diagram corresponding to FIG.

FIG. 5 is an operation explanatory view corresponding to FIG.

[Explanation of symbols]

 1 Helmet 2 Helmet Main Body 5 Opening 6 Shield 9 Substrate 22 Pivot Mechanism 23 Shaft 23a Shaft Center 24 Rib 25 Space 27 Annular Portion 28 Inner Hole 29 Slit 30 Holding Means 36 Locking Protrusion 37 First Locking Recess (Locking Recess) ) 38 second locking recess (locking recess)

Claims (1)

[Claims] 1. A shaft portion provided on one of a side portion of a helmet body and a side portion of a shield and having a shaft center extending left and right, and a shaft portion provided on the other side, around the shaft center. In a shield pivot support mechanism for a helmet having an annular portion which is fitted relatively rotatably, a slit is formed by dividing a part of the annular portion in the circumferential direction, and the slit is expanded. By elastically deforming the annular portion, the inner hole of the annular portion can be enlarged, and a locking projection is formed on one of the outer peripheral surface of the shaft portion and the inner peripheral surface of the annular portion, and the other surface is A shield pivotal support mechanism for a helmet, wherein a locking recess is formed which engages with the locking projection in a disengageable manner by relative rotation of a shaft portion and an annular portion.