JPH0135921B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a rotating mechanism of a shield of a helmet with a shield.

Some helmets worn when riding a motorcycle or the like have a front opening covered with a transparent shield to protect the face from wind, rain, and dust while riding. Both ends of the shield are attached to the helmet with setscrews, and the shield rotates about the setscrews so that the front opening of the helmet can be opened and closed. In this configuration, since the shield rotates around the set screw, it is difficult to maintain constant resistance when opening and closing the shield over a long period of time, and torque is repeatedly applied to the set screw due to long-term use. As a result, the set screw became loose and there was a risk of it falling off. Furthermore, in order to prevent rain from entering the opening from the top of the shield when the shield is closed, the trim material is structured to cover the top of the shield, but each time the shield is opened, that part is compressed and deformed. The drawback is that the sealing performance is impaired after long-term use.

This invention was made to eliminate such conventional drawbacks, and provides a structure that allows the shield to be opened and closed smoothly for a long period of time, and does not impair the sealing performance between the shield and the trim material. It is. That is, the first gist of the present invention is that in a structure in which both ends of a transparent shield covering the front opening of a helmet are rotatably attached to both sides of the helmet, the shield is attached to the edge of the front opening. A trim member is attached to the opening edge of the helmet, which closes the front opening by contacting the outer surface and smoothly connects the outer surface of the helmet and the outer surface of the shield in this closed state. A pair of front and rear links are arranged approximately parallel to each other, the tip of each link is connected to the side of the shield, and the base of each link is rotatably connected to the helmet, and the shield is rotated by rotation of each link. The front link is set longer than the rear link so that it moves forward when it first opens and then rises.

The second gist of the invention is that, in addition to the above configuration, one of the front and rear links is coupled with a pulley that rotates coaxially with that link, and rotational force is transmitted between the pulleys on both sides of the helmet. It is also possible to cross the lines so that the

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a helmet, 2 is a trim member attached to the periphery of an opening formed in the front part of the helmet, and 3 is a shield that covers the opening. The side ends of the shield 3 are connected to a pair of mutually substantially parallel links 4,
It is rotatably held by 5. The links 4 and 5 are rotatably attached to the helmet 1 by fixing nails 41 and 51, respectively.
The retaining pins 42, 52 for the shield 3 at the tip of the
draw circular arc trajectories 40 and 50 centered on fixed nails 41 and 51, respectively. And link 4 and link 5
Since the arc trajectories 40 and 50 have different lengths, the curvatures of the arc trajectories 40 and 50 are different, and therefore both links 4 and 5 move differently from each other, as shown in FIG. That is, the stop pin 42 at the tip of the link 4 is located at the locus 40.
Correspondingly, the stop pin 52 at the tip of the link 5 moves at a constant rate A, B, C...G along the trajectory 50. , both rotate in almost the same way at the beginning, but later the rotation of link 5 becomes slower, and finally the rotation of link 5 becomes slower.
rotates in the opposite direction. As a result, the shield 3 first moves forward from the closed state to the state 3a, as shown by the imaginary line in FIG. It rises and reaches state 3b.

In order to synchronize the movements of the links 4 and 5 with each other on both sides of the helmet, a cam pulley 7 and a guide member 6 are installed coaxially with the fixed nail 41, and a line for transmitting rotational force is installed between the cam pulleys 7 on both sides. 8
is being passed over. The line 8 continues from the cam pulley 7 through the guide rollers 9, 90 and through the underside of the trim material 2 (between the helmet and the helmet) to the other side.

As shown in FIGS. 3 to 8, the guide member 6 includes a boss 60 through which a fixing nail 41 passes through a flat main body 65.
A boss 61 is provided through which the fixing nail 51 passes, and an engaging portion 63 for a cam, which will be described later, is provided on an arc centered on the boss 60. Also, the main body 6
A shaft 62 for holding the guide roller 9 of the wire 8 is formed protruding from the lower part of the wire 5 .

The cam pulley 7, as shown in FIGS. 9 to 12,
A hole 70 through which the fixed nail 41 passes is formed in the center of the disc-shaped main body 71, and a groove 73 for the wire 8 is formed on the outer periphery.
A cam portion 72 is formed to engage with the engaging portion 63, and a slit 75 for locking the wire 8 is formed on the side of the groove portion 73.

13 and 14 show how each of the above members is attached to the helmet 1. A female screw 11 is fixed to the helmet 1, and fixing nails 41 and 5 are fixed to the helmet 1.
A guide member 6 is disposed between the head of the fixing nail 41 and the female screw 11 so that the fixing nail 41 passes through the boss 60, and the boss 60 is passed through the hole 70 of the cam pulley 7. The cam pulley 7 is rotatably arranged. The link 4 consists of a pair of plate materials, which sandwich the cam pulley 7 and are connected to each other by fitting the protrusion 74 of the cam pulley into the hole of the link 4.
At the tip of the shield 3, hold the retaining pin 4.
It is combined with 2. The wire 8 passes through the groove 73 and the link 4 and extends around the outer periphery of the cam pulley 7. Further, the fixing nail 51 is the boss 6 of the guide member 6.
1, and one end of the link 5 is externally fitted onto this boss 61.

In the above configuration, even if the fixing nails 41, 51 are firmly tightened to the female thread 11, the bosses 60, 61 are only pressed in the axial direction, and the force for crimping the links 4, 5 is set constant. Therefore, the rotation of the links 4 and 5 and the operation of the shield can be easily performed. As the link 4 rotates, the cam pulley 7 also rotates, and the cam portion 72 engages with the engaging portion 63, thereby creating a moderate rotational resistance. The unevenness allows the shield 3 to be stopped at an appropriate opening angle. Furthermore, as the cam pulley 7 rotates, the line 8 that spans it transmits the rotational force to the other cam pulley 7, so the cam pulleys 7 on both sides rotate by the same angle of rotation, which opens and closes the shield 3. We make sure that everything is done smoothly. The opening/closing operation of the shield may be performed by holding the shield by hand, or by providing an appropriate operating section on the cam pulley 7 or the links 4 and 5 and operating it by holding it, as shown at 20 in Fig. 1. It's okay. By doing this, you will not be able to touch the shield directly with your hands, so you can prevent the shield from getting dirty. In either case, the movement trajectory of shield 3 is linked to links 4 and 5.
As mentioned above, it protrudes forward and rises after separating from the protrusion 21 of the trim material. The arrangement of the links that make such shield movements is not limited to the illustrated example, and various arrangements can be adopted. Although not shown in the drawings, it is preferable to attach an appropriate cover to cover the link part in order to protect the link part and improve the appearance.

As explained above, the present invention utilizes a pair of links to open and close the shield, and the opening and closing can be done smoothly without compromising the sealing performance between the shield and the trim material. It's something that doesn't exist.

[Brief explanation of drawings]

Fig. 1 is a side view of a helmet showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of the link, and Fig. 3
The figure is a plan view of the guide member, Nos. 4, 5, 6, 7, and 8.
The figures are - line, - line, - of Fig. 3, respectively.
Figure 9 is a plan view of the cam pulley, Figures 10, 11, and 12 are cross-sectional views taken along lines -, XI-XI, and XII-XII in Figure 9, respectively. Figure 14 is the − of Figure 2, respectively.
It is a line, - line sectional view. 1... Helmet, 2... Trim material, 3... Shield, 4, 5... Link, 6... Guide member,
7... Kampuri.

Claims (1)

[Claims] 1. In a configuration in which both ends of a transparent shield covering the front opening of the helmet are rotatably attached to both sides of the helmet, the shield abuts the outer surface of the edge of the front opening. A trim member is attached to the edge of the opening of the helmet to close the front opening, and in this closed state, smoothly connect the outer surface of the helmet with the outer surface of the shield. The links are arranged substantially parallel to each other, the tips of each link are respectively coupled to the sides of the shield, and the base of each link is rotatably coupled to the helmet, and when the shield begins to open as the links rotate, A helmet with a shield characterized in that the front link is set longer than the rear link so that it moves forward and then rises. 2 In a configuration in which both ends of a transparent shield covering the front opening of the helmet are rotatably attached to the sides of the helmet, the shield closes the front opening by abutting against the outer surface of the edge of the front opening. A trim material is attached to the edge of the opening of the helmet to smoothly connect the outer surface of the helmet and the outer surface of the shield in this closed state, and a pair of front and rear links are installed on each side of the helmet in parallel to each other. The tip of each link is connected to the side of the shield, and the base of each link is rotatably connected to the helmet, and rotation of each link causes the shield to initially move forward and then open. The front link is set longer than the rear link so that it can rise, one of the front and rear links is connected to a pulley that rotates coaxially with that link, and a rotating pulley is connected between the pulleys on both sides of the helmet. A helmet with a shield that is characterized by a wire that runs across it to transmit power.