JPH10110320A - Device for attaching shield plate of helmet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly connect a shield plate to a helmet body and prevent the shield plate from carelessly separating by maloperations. SOLUTION: This device for attaching a shield plate 20 of a helmet is obtained by increasing a contact area in a connecting part of a supporting unit 10 provided on the side of the helmet body 2 with a boss part 21 formed on the side of the shield plate 20 and firmly attaching the shield plate 20 to the helmet body 2. When the shield plate 20 is separated from the helmet body 2, a rotating position of the shield plate 20 is set at a prescribed position and a lever 27 is operated in two stages to actuate a pressing piece 26.

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, for example, a motorcycle driver on a head, and more particularly to a shield plate mounting device for opening and closing a window formed at a front portion of a helmet body.

[0002]

2. Description of the Related Art As a prior art, Japanese Patent Laid-Open Publication No.
No. 3 was disclosed. That is, a mounting board is fixed to an outer surface of a cap body (helmet body), and a first notch on a peripheral wall and a first guide groove on an inner peripheral surface are provided on the outer surface of the mounting board; A second notch in the peripheral wall, which is arranged concentrically with the outer wall, and an arc-shaped guide protruding wall having a second guide groove on the outer peripheral surface; A pivot that can be fitted, a first locking claw that protrudes from the outer peripheral surface of the pivot and can be engaged with the first guide groove via the first notch, and the second guide groove via the second notch And a second locking claw that can be engaged with a lock lever. A lock lever that can swing between a lock position and an unlock position is pivotally supported on the mounting board.
According to the lock position and the unlock position,
First and second lock claws capable of engaging and disengaging with the first and second locking claws are provided in the second notch, and a lock spring for biasing the lever toward the lock position is provided.

[0003]

In the above-mentioned prior art, a first notch and an arc-shaped first guide groove are provided on a peripheral wall of a cylindrical support provided on a mounting board, and a tube provided on a shield plate side. An arcuate first locking claw is provided on the peripheral wall of the pivot shaft, and the first locking claw is engaged with the first guide groove through the first notch. The contact area between the claw and the first guide groove is reduced, and the engagement strength between the two is reduced. Further, the lock lever is provided with first and second lock claws, and these are engaged with the first and second locking claws so as to have a function of preventing the shield plate from slipping outward. In this case, a load is applied in a direction perpendicular to the rocking direction of the lock lever, so that it is difficult to bear a large load.

Further, the first and second lock claws provided on the lock lever are provided with the first and second lock claws in the rotation direction of the lock lever.
When the lock lever is rotated in the unlocking direction to be disengaged from the second locking claw, the first and second locking claws are disengaged from the first and second locking claws regardless of the rotation position of the shield plate. And the connection strength between the shield plate and the helmet body becomes unstable. SUMMARY OF THE INVENTION An object of the present invention is to provide a new helmet shield plate mounting apparatus which solves the above-mentioned disadvantages.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention is configured as follows. That is, U
A horseshoe-shaped boss with an opening on the rear side is integrally provided on the inner surface on both sides of the V-shaped shield plate, and engaging recesses recessed in the outer peripheral direction are provided on opposing sides of the boss rear portion. The support is extended in the front-rear direction and is provided rotatably, and a semi-elliptical connection edge is formed on the outer peripheral edge on the front side of the support so that the boss portion is slidably fitted and locked. An engagement claw that is urged to project from the inner peripheral side of the support in the outer peripheral direction and fits into the engaging concave portion; a slider that fits in the inner peripheral portion of the support so as to be able to move back and forth; A locking mechanism having a cam surface for moving the engaging claw to the inner peripheral side of the support when disengaged from the engaging concave portion when moving to the front side, and being advanced by levers on both sides of the helmet body; Provide a pressing piece to advance the slider, and An arc-shaped regulating guide is provided on the surface, the radius of which is the center of rotation of the support, and the front end of the pressing piece is slidably locked. The front side of the regulating guide and the upper side rotation of the shield plate In this configuration, a piece passage groove that allows the pushing piece to move forward is provided in a portion facing the pushing piece at the time. Further, the shield plate is provided with rotating teeth having a radius around the center of rotation of the support on the outer peripheral portion of the boss portion, and fixed teeth are provided on the inner surfaces on both sides of the helmet main body so as to mesh with the rotating teeth. is there.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a partial side view showing a part of the shield plate according to the present invention when the shield plate is closed, FIG. 2 is a partial side view of the shield plate according to the present invention at the beginning of an opening operation, and FIG. 3 is a shield plate according to the present invention. 4 is a partial side view at the end of the opening operation of FIG. 4, FIG.
5 and 6 are sectional views taken along lines VV and VI-VI in FIG. 4, FIG. 7 is a side view in which a part of the shield plate is cut away, and FIG.
I is a sectional view, and FIG. 9 is an enlarged side view showing a part of another embodiment of the lock mechanism.

In FIG. 1, reference numeral 1 denotes a full-face type helmet, which is fitted to a hollow hemispherical helmet main body 2 having a window 3 on the front side (right side in FIG. 1) and a front side of the helmet main body 2. And a U-shaped shield plate 20 for opening and closing the window 3. The shield plate 20 is formed of a see-through plastic plate that allows a visual field, and has a horseshoe-shaped boss 21 on the inner surface on both sides of the rear end with the opening thereof facing the rear (left side in FIG. 1). Stick to

As shown in FIGS. 7 and 8, the boss portion 21 is formed integrally with a horseshoe-shaped engaging flange 22 projecting inward away from the inner surface of the shield plate 20 over the entire inner peripheral portion. An engaging recess 23 is formed on the opposite side of the rear portion of the engaging flange 22 so as to be recessed in the outer peripheral direction. This engagement recess 23
The rear surface 23a is perpendicular to the extension direction (front-back direction) of the rear portion of the engagement flange 22 and the front surface 23b is
It is formed in a sawtooth shape inclined at an angle of about 45 degrees with respect to the extension direction of the rear portion, the rear surface 23a is an engagement surface with which an engagement claw 17 described later is engaged, and the front surface 23b is engaged with the engagement claw 17. The cam surface is moved inward of the mating flange 22.

A base 5 formed in a plate shape from a plastic material on both outer surfaces of the helmet body 2 is provided on the upper first side.
Fixed by the pin 6 and the lower second pin 7 (FIG. 1),
An elliptical support 10 is extended in the front-rear direction on the upper side of the base 5, and the center thereof is rotatably fitted to the first pin 6 via the spacer 9, and the tip of the first pin 6 The support 10 is rotatably mounted on the upper surface of the base 5 by screwing a retaining bolt 6a (FIG. 8) onto the upper surface of the base 5 with a predetermined gap. The spacer 9 may be formed integrally on the back surface of the support 10.

A semi-elliptical connecting edge 11 is formed on the outer peripheral edge of the front side of the support 10 and the engaging flange 22 of the boss 21 is slidably fitted to the connecting edge 11 from the front. Engage and lock. A U-shaped guide wall 12 is formed along the connecting edge 11 on the inner peripheral portion on the front side of the support 10, and a regulating wall 13 connected to the guide wall 12 on the rear side of the support 10.
The regulation wall 13 and the guide wall 12 form an elliptical chamber 14 which is elongated in the front-rear direction on the inner peripheral side, and a lock mechanism 15 is provided in the chamber 14.

The lock mechanism 15 is as follows. That is, the slider 16 curved in a U-shape is moved toward the front (the right side in FIG. 1) with the opening side facing the chamber 1.
An engagement claw 17 that protrudes outward is integrally formed at the open end (right end in FIG. 1) of the slider 16. This engaging claw 17 is shown in FIG.
As shown in the figure, the rear surface 17a is formed in a sawtooth shape in which the front surface 17b is perpendicular to the extension direction (front-back direction) of the slider 16 and the front surface 17b is inclined at an angle of about 45 degrees with respect to the extension direction of the slider 16 rear portion. The rear surface 17a is the shield plate 2 described above.
On the engagement surface with which the rear surface 23a of the engagement recess 23 on the 0 side engages,
The front surface 17b is a cam surface that comes into contact with the front surface 23a of the engagement recess 23.

The slider 16 has a thin portion 16a formed in a curved portion thereof, and the thin portion 16a has a spring function, and urges both sides of the slider 16, that is, the engaging claws 17 outward. The guide walls 12 are formed with claw passage grooves 12a on both sides on the rear side thereof, and when the slider 16 moves to the rear side, the respective engagement claws 17 are moved to the claw passage grooves 1a.
The shield plate 20 is made to protrude outward from 2a to engage with the engagement recess 23 on the shield plate 20 side, thereby preventing the shield plate 20 from being removed.

A pressing piece 26 for pressing and moving the slider 16 forward is provided on a lower rear portion of the base 5 as described above.
And a lever 27 is connected to a rear end of the pressing piece 26 by a pin 28, and the pressing piece 26 is moved forward and backward by the lever 27. As shown in FIG. 3, the pressing piece 26 is moved in the direction of movement of the pressing piece 26 when the support 10 is turned when the shield plate 20 is turned to the upper side of the helmet body 2 so that the window 3 is opened. Is set to a position corresponding to the moving direction of the slider 16.
Also, at this position, a piece passage groove 1 for allowing the pressing piece 26 to advance toward the rear end of the slider 16 is provided.
3 a is formed at the rear end of the regulating wall 13.

Further, a regulating guide 30 for regulating the forward and backward movement of the pressing piece 26 is formed on the regulating wall 13 at the rear of the support plate 10 (FIG. 4). The restricting guide 30 is formed by an arc-shaped groove and a ridge (rib) having the radius of the axis of the first pin 6 as a radius, and the piece passage groove 13 a and the front part of the shield plate 20 closing the window 3. It is formed between the pressing piece 26 and the facing portion at the time of side rotation. Also, at the front end of the pressing piece 26, FIG.
As shown in FIG. 1, a hook-shaped engaging portion 26a is formed to slidably engage with the regulating guide 30. When the shield plate 20 closes the window 3 (the state shown in FIG. 1), the lever 27 is turned on. When the shield plate 20 opens the window 3, the pressing piece 26 is advanced by the lever 27 to the second position via the piece passing groove 13a. The engaging claw 1 is advanced through the cam surfaces (front surfaces) 17b and 23b by moving the slider 16 forward.
7 is disengaged from the engaging recess 23 on the shield plate 20 side, so that the shield plate 20 can be disengaged from the support 10. Thereby, the advance position of the pressing piece 26, that is, the shield plate 20
Is set to a predetermined rotation position with respect to the support plate 10,
Inadvertent detachment of the shield plate 20 is prevented.

The lever 27 is connected to the lower second side.
The second pin 7 is rotatably fitted to the pin 7 and a retaining bolt (not shown) is screwed to the tip of the second pin 7 to prevent the second pin 7 from coming off. Also,
A knob 27a is provided at the lower end of the lever 27, and this knob 27a is projected downward from the rear part of the base 5 to facilitate operation at the rear lower part of the shield plate 20. The lever 27 is urged to rotate in a direction indicated by an arrow (a) (leftward in FIG. 1) by a plastic spring 31 integrally provided at a lower rear portion of the base 5 to retract the pressing piece 26. Energize.

On the outer peripheral portion of the lower portion of the boss portion 21 of the shield plate 20, rotating teeth 34 having a radius of the center of rotation of the support 10 are formed. The resilient teeth are engaged, and the shield plate 20 is held at a predetermined rotation position. Reference numeral 36 denotes a U-shaped elastic arm that elastically supports the fixed teeth 35.

Next, the operation of the above embodiment will be described. First, during normal use, as shown in FIG. 1, the pressing piece 26 is moved rearward via the lever 27 by the reaction force of the spring 31, and retracts rearward from the regulating guide 30. As a result, the shield plate 20 rotates upward to the angle shown in FIG.
When the lever 27 is inadvertently operated (turned clockwise in FIG. 3) in a state facing the
6 collides with the rear surface of the regulation guide 30 and the slider 16
Is no longer pushed forward. This prevents the shield plate 20 from accidentally detaching from the helmet body 2.
Further, the shield plate 20 is formed by engaging the engagement flange 22 formed on the periphery of the horseshoe-shaped boss portion 21 with the semi-elliptical connection edge 11 formed on the periphery of the elliptical support body 10. As a result, the contact area of the connecting portion is increased, and the shield plate 20 can be firmly connected to the helmet body 2.

Next, the shield plate 20 is connected to the helmet body 2.
When the user wants to release the lever 27, the lever 27 is turned clockwise while the shield plate 20 closes the window 3 (the state shown in FIG. 1).
In other words, the pressing piece 26 is rotated in the direction of the arrow (a) to advance the pressing piece 26 to the first position where the pressing piece 26 can be engaged with the restriction guide 30. In this state, the shield plate 20 is rotated to a position where the window 3 is opened, and the rear end of the slider 16 faces the pressing body 26. Then, the locking portion 26a of the pressing piece 26 faces the rear end of the slider 16 and the piece passing groove 13a in a state fitted to the regulation guide 30 (the state of FIG. 3). In this state, the lever 27 is further turned clockwise, that is, in the direction of the arrow (A). Then, the pressing piece 26 is moved to the piece passing groove 1.
The slider 16 is advanced to the second position via 3a, and the slider 16 is advanced. As a result, the engagement pawl 17 is moved to the cam surface (front surface) 17.
b, 23b, and is moved to the inside of the chamber 14 and detaches from the engaging recess 23 on the shield plate 20 side. When the shield plate 20 is pulled forward in this state, the engagement flange 22 of the boss 21 is
Is detached from the connection edge 11 of the support 10, and the shield plate 20 is detached from the helmet body 2.

In this case, a load is mainly applied to the engaging claw 17 in the direction in which the shield plate 20 is removed, that is, in the front direction, and almost no load is applied in the thickness direction.
In addition, the size of the engaging recess 23 with which this engages can be reduced.

The above-described lock mechanism 15 may have a structure shown in FIG. That is, a pair of L-shaped engaging pieces 4
The reference numerals 0 and 40 are stacked on top of each other so as to be back-to-back, housed in the chamber 14, and fitted to the guide pins 43 fixed to the support 10 so as to be movable toward and away from each other (up and down in FIG. 9). Engagement claws 41, 41 are formed on the outer ends of the engagement pieces 40, 40, and the engagement claws 41, 41 can be disengaged from engagement recesses 23a, 23a formed on the boss 21. Each of the engagement pieces 40, 40 is urged by a compression spring 44 to move in a direction away from each other (vertical direction in FIG. 9), so that the engagement claws 41, 41 are engaged with the engagement recesses 2 on the boss 21 side.
3a and 23a are urged to engage.

A slider 45 is fitted slidably in the front-rear direction at the rear part (the left part in FIG. 9) of the chamber 14, and a valley which expands at an angle of about 90 degrees in the vertical direction at the front part of the slider 45. A cam surface 45a is formed, and the rear ends 40a of the engaging pieces 40 are brought into contact with the cam surface 45a. Also, a small-width pressed portion 45b is provided at the rear end of the slider 45.
Is formed, and the pressed portion 45b is fitted into the piece passage groove 13a formed at the rear end of the support 10. The rest of the structure is the same as that of the above-described embodiment, so the same reference numerals are given and the description is omitted.

According to FIG. 9, when the slider 45 is advanced by the pressing piece 26, the cam surface 45a moves the engaging pieces 40, 40 in a direction approaching each other, and the engaging claws 41, 41 are bossed. The shield plate 20 is detached from the helmet main body 2 by being detached from the engagement recesses 23a on the part 21 side. The engagement between the support 10 and the boss portion 21 is performed by forming a convex connection edge on the outer periphery of the support 10 and a groove-shaped connection edge on the inner periphery of the boss portion 21. You may make it movably fitted and locked.

[0023]

As is apparent from the above description, according to the present invention, the contact area between the support provided on the helmet main body side and the boss provided on the shield plate side is increased, and the shield plate is connected to the helmet. It will be firmly connected to the body. When the shield plate is detached from the helmet body, the turning position of the shield plate is set to a predetermined position and the lever is operated in two steps to operate the pressing piece. It is possible to prevent an easy separation, and to achieve effects such as an increase in safety.

[Brief description of the drawings]

FIG. 1 is a partial side view of a part of a shield plate according to the present invention when the shield plate is closed.

FIG. 2 is a partial side view of the shield plate according to the present invention at the beginning of an opening operation.

FIG. 3 is a partial side view at the end of the opening operation of the shield plate according to the present invention.

FIG. 4 is an enlarged side view of a main part of FIG. 2;

FIG. 5 is VV in FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is a side view in which a part of the shield plate is broken.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7;

FIG. 9 is an enlarged side view, partially in section, showing another embodiment of the lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Helmet 2 Helmet main body 3 Window 5 Base 6 1st pin 6a Fixing bolt 7 2nd pin 9 Spacer 10 Support body 11 Connection edge 12 Guide wall 12a Claw passage groove 13 Regulation wall 13a Piece passage groove 14 Room 15 Lock mechanism 16 Slider 16a Curved portion 17 Engagement claw 17a Rear surface 17b Front surface (cam surface) 20 Shield plate 21 Boss portion 22 Engagement flange 23 Engagement concave portion 23a Rear surface 23b Front surface (cam surface) 26 Press piece 26a Lock portion 27 Lever 27a Knob 28 Pin 29 Holding piece 30 Regulation guide 31 Spring 34 Rotating tooth 35 Fixed tooth 36 Elastic arm

Claims (2)

[Claims] 1. A horseshoe-shaped boss (21) having an open rear side is integrally provided on the inner surface on both sides of a U-shaped shield plate (20), and the boss (21) is recessed in the outer peripheral direction on the opposite side of the rear part. An engaging recess (23) is provided, and an elliptical plate-like support (10) is provided on the inner surface on both sides of the helmet body (2) so as to be rotatable by extending in the front-rear direction, and at the front side of the support (10). A semi-elliptical connection edge (11) is formed at the outer peripheral edge of the boss so that the boss (21) is slidably fitted and locked, and protrudes outward from the inner peripheral side of the support (10). Engagement claw (17) that is urged to fit into the engagement recess (23)
A slider (16) fitted to the inner peripheral portion of the support (10) so as to be able to move back and forth, and when the slider (16) moves to the front side, the engaging claw (17) is supported by the support ( A lock mechanism (15) having a cam surface (17b, 23b) to be moved to the inner peripheral side of 10) and disengaged from the engagement concave portion (23) is provided, and a lever (27) is provided on both sides of the helmet body (2). A pressing piece (26) is provided which is advanced and advances the slider (16), and the center of rotation of the support (10) is provided on the rear surface of the support (10), and the pressing piece (2) is provided.
6) An arc-shaped regulating guide (30) is provided, the front end of which is slidably engaged, and is pressed on the front side of the regulating guide (30) and when the shield plate (20) rotates on the upper side. A shield plate mounting device for a helmet, wherein a piece passage groove (13a) for allowing the pushing piece (26) to advance is provided in a portion facing the piece (26). 2. A boss (21) of the shield plate (20).
The outer periphery of the helmet is provided with rotating teeth (34) having a radius of the center of rotation of the support (10), and the inner surfaces of both sides of the helmet body (2) are provided with fixed teeth (35) which engage with the rotating teeth. The shield plate mounting device for a helmet according to claim 1, wherein: