JPH0138882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Purpose of the invention (1) Industrial field of application The present invention relates to a shield plate device for a helmet used mainly for occupants of a motorcycle, that is, a transparent shield plate device for opening and closing a window on the front wall of a helmet body. The present invention relates to a shield plate device in which a shield plate is rotatably supported in a vertical direction on a side wall of a cap body.

(2) Prior Art Conventionally, the shield plate of a helmet is pivotally supported on the cap body so that the window can be opened and closed by a simple arc movement.

(3) Problems to be Solved by the Invention In this conventional structure, the shield plate extends outward from the outer surface of the cap body even in the closed position of the window so that the above-mentioned arcuate movement is possible without interfering with the cap body. will be placed. Therefore, when the window is closed, a stepped portion is formed from the outer surface of the shield plate to the outer surface of the cap body, and this stepped portion not only spoils the appearance of the helmet but also causes air resistance.

The present invention has been made in view of these points,
When the window is closed, the outer surface of the shield plate is substantially continuous with the outer surface of the cap body, which improves the appearance of the helmet and reduces air resistance. Furthermore, the shield plate can be opened without interfering with the cap body. The purpose of the present invention is to provide a shield plate device.

B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a method of receiving a shield plate on the outer surface of the cap body when the window is closed, and surrounding the outer surface of the plate. A concave portion is provided to make the outer surface of the cap body substantially flush, and a pivot shaft and a guide shaft that are parallel to each other are protruded from the side wall of the cap body, and a support hole that extends in the front-rear direction and engages with the pivot shaft is provided in the shield plate; A shield plate is provided with a guide hole formed of a front half extending in the front-rear direction and a rear half forming an arc from the rear end of the front half to draw an arc centering on the rear end of the support hole and engaging with the guide shaft. When the shield plate is operated from the closed position to the opening direction, the escape route of the shield plate from the recess is first regulated by the relative movement of the pivot and the support hole, and the guide shaft and the front half of the guide hole, and then the guide shaft and the rear half of the guide hole are controlled. The shield plate is characterized in that the upward rotation path of the shield plate is regulated by relative movement of the parts.

(2) Effect According to the above configuration, when the window is closed, the shield plate can be depressed into the recess on the outer surface of the cap body, and the outer surface of the shield plate can be made to be substantially continuous with the outer surface of the cap body.

When the shield plate is operated from the closed position of the window in the opening direction, the shield plate first escapes from the recessed portion by the guiding actions of the pivot shaft and the support hole, the guide shaft and the front half of the guide hole, and then the guide shaft and the rear half of the guide hole Due to the guiding action, the shield plate can be rotated upward without being interfered with by the cap body.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 1, the cap body 1 of a helmet is of a full-face type having a chin cover portion 1a below a window 2 on its front wall. The window 2 is opened and closed by a transparent shield plate 3.

The shield plate 3 is made of synthetic resin and is formed into a curved shape so as to surround the front half of the cap body 1, and has ears 3 at both ends that extend toward the rear of the window 2.
It is considered a. This shield plate 3 is given elasticity to contract in the left-right direction of the helmet. In other words, the radius of curvature of the shield plate 3 in its free state is set to be sufficiently smaller than the radius of curvature of the front half circumference of the cap body 1.

The shield plate 3 is at the lower position A where the window 2 is fully closed.
and an upper position B where the window 2 is fully opened.The recess 4 that receives the entire shield plate 3 at the lower position A is opened in the cap body 1. Provided on the outer surface. The depth of the recess 4 is approximately the same as the thickness of the shield plate 3, so that the outer surface of the shield plate 3 received by the recess 4 is
It is substantially flush with the outer surface of the cap body 1 surrounding it.

A camera 5 for opening and closing the shield plate 3 is integrally formed at the front of the lower edge of the shield plate 3.

In the recess 4 , a rubber seal member 6 that can be brought into close contact with the inner surface of the shield plate 3 is adhered to the periphery of the window 2 .

As shown in FIGS. 2 and 7, the shield plate 3
is attached to the cap body 1 via a pair of left and right brackets 8 (only the left one is shown in the figure). The bracket 8 has a pair of long holes 9, 9 in the front and back, and screws 10, 10 inserted through these are inserted into the cap body 1.
It is fixed to the cap body 1 by screwing into the screw holes 7, 7.

On the outer surface of the bracket 8, a pivot shaft 11 and a guide shaft 12 located in front of and parallel to the pivot shaft 11 are integrally protruded, and a support drilled in the ear portion 3a of the shield plate 3 is attached to the pivot shaft 11. The hole 13 and the guide hole 14 are fitted, respectively, and screws 15 and 16 are screwed onto the end surfaces of both shafts 11 and 12, respectively, to prevent them from coming off.

Both the support hole 13 and the guide hole 14 are long holes, but the support hole 13 extends substantially horizontally along the front and back direction of the helmet, whereas the guide hole 14 extends slightly downward in the rear direction. It consists of a front half part 14a that is inclined to , and a rear half part 14b that draws an arc around the rear end of the support hole 13.

Further, a shield plate 3 is provided at the front end of the bracket 8 in order to regulate the lower position A of the shield plate 3.
A stopper 17 is provided in a protruding manner to support the lower edge of the ear portion 3a.

Furthermore, an expansion cam 18 is formed at the upper end of the bracket 8, which faces the upper edge of the ear portion 3a when the shield plate 3 is in the lower position A, and this expansion cam 18, as shown in FIG. It stands adjacent to the upper wall of the recess 4 and slopes upward.

When the shield plate 3 is set at the lower position A, it contracts and is received in the recess 4 of the cap body 1, and the outer surface of the shield plate 3 is substantially flush with the outer surface of the cap body 1. Since it forms a continuous curved surface, it contributes to reducing the air resistance of the helmet.

In this state, as shown in FIG.
and the guide shaft 12 are located at the front ends of the support hole 13 and the guide hole 14, respectively.

Now, in order to open the window 2, when you put your finger on the photo 5 of the shield plate 3 and apply upward force, the shield plate 3 first tries to rotate upward about the pivot 11, but the guide shaft 12 and the rear downwardly inclined front half 14a of the guide hole 14, the shield plate 3 is pushed forward at the same time as it is rotated upward. Then, when the ear portion 3a attempts to pass the expansion cam 18 as the shield plate 3 moves upward,
The ear portion 3a is pushed outward by the cam 18. As a result, the shield plate 3 can completely escape from the recess 4.

When the shield plate 3 escapes from the recess 4, as shown in FIG.
4a enters into engagement with the guide shaft 12, after that the shield plate 3 rotates upward while drawing a simple arc about the pivot 11, and reaches the upper position B where the window 2 is fully opened.

At this time, the rear end wall of the guide hole 14 comes into contact with the guide shaft 12 and restricts further rotation.

The shield plate 3 is placed in the lower position A and the upper position B.
A click stop device 20 is provided on the bracket 8 and the shield plate 3 so that it can be held not only at a plurality of intermediate positions therebetween but also at a plurality of intermediate positions therebetween. The plurality of notches 21, 21... of the device 20 are connected to the pivot 1
The projections 22, which are groove-shaped on the outer surface of the bracket 8 and extend radially around the lower side of the bracket 1, and which selectively engage with the notches 21, 21, are protruded from the inner surface of the portion 3a. The engagement force of this protrusion 22 with the notches 21, 21, . . . depends on the elasticity of the ear portion 3a.

Returning to FIG. 1 again, the bracket 8 and the ear portion 3a are covered by a side cover 23. As shown in FIG. As shown in FIG. 7, this side cover 23 has a pair of upper and lower locking claws 24 and 25 on its rear inner surface, and these are engaged with a pair of upper and lower locking claws 26 and 27 provided on the bracket 8. In the fitted state (see Fig. 5), by fixing the front end of the side cover 23 to the cap body 1 with screws 28, the side cover 23
is attached to the cap body 1 and the bracket 8.

C. Effects of the Invention As described above, according to the present invention, a recess is provided on the outer surface of the cap body to receive the shield plate when the window is closed, and to make the outer surface of the plate and the outer surface of the cap body surrounding it substantially flush, A pivot shaft and a guide shaft that are parallel to each other are protruded from the side wall of the cap body, and the shield plate has a support hole that extends in the front-back direction and engages with the pivot shaft, a front half that extends in the front-back direction, and a rear end of this front half. and a guide hole that forms a circular arc around the rear end of the support hole and engages with the guide shaft, so that when the shield plate is operated from the closed position of the window in the opening direction, The escape route of the shield plate from the recess is controlled by the relative movement of the pivot and the support hole, and the guide shaft and the front half of the guide hole, and then the upward rotation path of the shield plate is controlled by the relative movement of the guide shaft and the rear half of the guide hole. As a result, when the window is closed, the shield plate can be lowered into the recess and the outer surface of the shield plate can be made to be substantially continuous with the cap body, which improves the appearance of the helmet and reduces its air resistance. By operating the shield plate in the opening direction, the shield plate can be automatically removed from the recess and then rotated to the open position without being interfered with by the cap body. . Furthermore, the structure is extremely simple, consisting of a pivot and a guide shaft of the cap body, and a support hole and a guide hole of the shield plate, and can be obtained at low cost.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention. Figure 1 is a side view of the entire helmet with the shield plate closed, and Figure 2 is an enlarged view of the main parts of Figure 1 with the side cover removed. 3 is a side view corresponding to FIG. 2 showing the shield plate in the middle of opening, FIGS. 4 and 5 are cross-sectional views taken along lines - and - in FIG. 2, and FIG. 6 is a side view corresponding to FIG. 7 is an exploded perspective view of the shield plate device. A...Lower position, B...Upper position, 1...Cap body, 2...Window, 3...Shield plate, 3a...Ear part, 4...Recessed part, 5...Photography, 8...Bracket , 11... Pivot, 12... Guide shaft, 13... Support hole, 14... Guide hole, 14a... First half of the guide hole, 14b... Second half of the guide hole.

Claims (1)

[Scope of Claims] 1. A shield plate device for a helmet in which both ends of a transparent shield plate are rotatably supported in the vertical direction on the side wall of the cap body in order to open and close a window on the front wall of the cap body, in which: , a recess is provided to receive the shield plate when the window is closed so that the outer surface of the plate and the outer surface of the cap body surrounding it are substantially flush with each other, and a pivot shaft and a guide shaft parallel to each other are protruded from the side wall of the cap body; The shield plate includes a support hole extending in the front-rear direction and engaging with the pivot shaft, a front half extending in the front-rear direction, and a rear half forming an arc from the rear end of the front half to the rear end of the support hole. and a guide hole that engages with the guide shaft, and when the shield plate is operated from the closed position of the window to the opening direction, first, the shield A shield plate device for a helmet, characterized in that an escape route of the plate from the recessed portion is regulated, and then an upward rotational path of the shield plate is regulated by relative movement between a guide shaft and a rear half of the guide hole.