JPH0138883B2 - - Google Patents

Description

Detailed Description of the Invention A. Purpose of the Invention (1) Industrial Field of Application The present invention relates to a shielding device for a helmet that is mainly of a closed type, and more specifically, to a shielding device for a helmet that is mainly a closed type. This invention relates to an improvement in a shield device that can be opened and closed.

(2) Conventional technology Conventionally, this type of shield device has a guide hole bored in the left and right side walls of the helmet body, guide pins erected at both left and right ends of the shield plate, and the guide pins are rotated. There is a device that is movably inserted into the guide hole via a roller, and when the guide pin is moved to a predetermined position in the guide hole, the shield plate moves into the window of the cap in conjunction with the movement of the pin. The shield member attached to the peripheral edge is crimped onto, separated from, or rotated upward from the cap body.

(3) Problems to be Solved by the Invention However, in the conventional shield device as described above, the rotating roller that is fitted into the guide pin is formed in a cylindrical shape, and therefore the guide pin does not fit into the guide hole. If the roller is tilted even slightly, the circumferential surface of the rotating roller supported by the pin will not properly slide against the inner wall of the guide hole, and as a result, the guide pin will not move smoothly within the guide hole. There is a problem that the shield plate cannot be operated properly. For that reason,
Conventionally, it is necessary to precisely align the axes of the guide hole and the guide pin, and manufacturing errors are not allowed, so there is a problem that manufacturing is labor-intensive and costs are high. Another problem is that if the guide pin is tilted during use, it must be corrected, which takes time and effort.

An object of the present invention is to provide a helmet shielding device that solves such problems.

B. Structure of the Invention (1) Means for Solving Problems In order to achieve the above-mentioned object, the present invention provides guide holes in both left and right walls of a helmet body with a window in the front, and an operation handle. Guide pins are provided upright at both ends of a shield plate that interlocks with the shield plate, and the guide pins are movably inserted into the guide holes via rotating rollers, and when the operation handle is operated, the guide pins are inserted into the guide holes. the shield plate is pressed against the sealing member attached to the window periphery of the cap body,
Alternatively, in the helmet shielding device configured to be separated from the sealing member or rotated above the cap body, the circumferential surface of the rotating roller is formed into a spherical surface.

(2) Function When the operation handle is operated, guide pins provided upright at both ends of the shield plate move through guide holes formed in the left and right side walls of the cap body via rotating rollers.
By the way, this rotating roller has a spherical peripheral surface, so even if the guide pin that supports the roller is tilted with respect to the guide hole, the roll will always be guided only by its maximum circumference. It abuts against the inner wall of the hole and maintains proper contact with the inner wall of the guide hole at all times. As a result, the guide pin moves smoothly within the guide hole, allowing the shield plate to operate properly.

(3) Embodiment Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. First, in FIG. 1, H is a closed-type helmet used by a jet aircraft pilot. Window 2 that opens to the front
Transparent synthetic resin shield plate 3 for closing
It is equipped with

A rubber seal member 4 is fitted and bonded to the peripheral edge of the window 2, and the shield plate 3
In the closed position of the window, the inner surface is pressed against the sealing member 4 by the tightening device 6 operated by the operating handle 5, at an operating position A, and at a releasing position B, at which it is slightly spaced forward from the sealing member 4. controlled,
Further, the cap body 1 is rotated upward by the operation handle 5 and controlled to the open position O (FIG. 5) where the window 2 is opened. A contact plate 3a made of synthetic resin is bonded to the inner surface of the peripheral edge of the shield plate 3 in order to ensure tight contact with the seal member 4.

The tightening devices 6 are provided on both left and right sides of the cap body 1, but since they have the same structure, only the left tightening device 6 will be explained with reference to FIGS. 2 and 3.

A through hole 8 is bored in the side wall of the cap body 1, and a mounting body 7 for attaching the tightening device 6 is inserted into the through hole 8.
and is hermetically fixed to the cap body 1 with an adhesive 9. The mounting body 7 has a cap shape, and a mounting base 10 is protruded from the center of the inner bottom surface thereof. A base plate 12 of the tightening device 6 is fitted into the open end of the mounting body 7 and fixed to the mounting base 10 with bolts 13. A guide shaft 14 is fixed perpendicularly to the center of the outer surface of the substrate 12.
Further, a first guide hole 15 is bored in the substrate 12. The first guide hole 15 includes an arcuate long hole 15a that is located in front of the cap body 1 from the guide shaft 14 and extends vertically about the shaft 14, and a long hole 15a that is bent from the lower end of the long hole 15a toward the rear of the cap body 1. It consists of a long hole 15b extending linearly.

An actuation plate 17 is disposed on the outside of the substrate 12, and the actuation plate 17 has second and third guide holes 19, 20.
is drilled. The second guide hole 19 consists of a pair of inner and outer elongated holes 19a and 19b that extend directly from the center of the actuating plate 17 to the front of the cap body 1 and overlap each other, and the outer elongated hole 19b has a larger diameter than the inner elongated hole 19a. is formed. Further, the third guide hole 20 is the outer elongated hole 19.
An elongated hole 20a extends linearly in the vertical direction of the cap body 1 from near the lower end of b, and a relatively short arc-shaped elongated hole 20b extends from the lower end of the elongated hole 20a in a bent direction toward the front of the cap body 1 around the guide shaft 14. It is made up of.

A groove 21 is formed on the outer periphery of the actuating plate 17, parallel to the side surface of the actuating plate 17, and extending toward the front of the cap body 1 (see Fig. 3), and is fixed to the end of the shield plate 3 with screws 22a. The shield plate 3 is fixed to the actuating plate 17 by fitting the attached mounting plate 22 into the cut groove 21 and screwing bolts 23a through bolt holes 23 provided in the actuating plate 17.

On the inner surface of the actuating plate 17, a mounting hole 2 is provided near the second guide hole 19 in the axial direction of the actuating plate 17.
A first guide pin 25 is inserted into this mounting hole 24, and a mounting screw 27 is screwed into a locking groove 25a formed at the base end of the pin 25 from the outer periphery of the actuating plate 17. By engaging the tips,
The first guide pin 25 is fixed to the actuating plate 17.

A cylindrical rotating roller 26 with a spherical circumferential surface is fitted into the first guide hole 25, and the roller 26 is fitted into a ring groove 25b formed at the tip of the pin 25. The stopper ring 33 restricts removal from the pin 25. Then, with the rotating roller 26 inserted, the first
The guide pin 25 is movably inserted into the first guide hole 15 of the substrate 12.

Further, a cylindrical rotating roller 28 having a spherical circumferential surface is fitted into the guide shaft 14.
The guide shaft 14 is inserted into the second guide hole 19 of the actuating plate 17 with the roller 28 fitted therein. In this case, the roller 28 insertion portion of the guide shaft 14 is connected to the actuating plate 1.
7 is located inside the outer elongated hole 19b.

Next, a washer 2 is attached to the outer surface of the actuating plate 17.
An operation plate 31 having an operation handle 5 is attached via 9 . This will be explained below.

A hole 32 is bored in the center of the operation plate 31 to be rotatably inserted into the guide shaft 14, and a second guide pin 34 is provided slightly below the hole 32 on the inner surface of the operation plate 31. A mounting plate 35 having a vertically disposed structure is fixed with screws 36. Therefore, the second guide pin 34 is eccentrically positioned relative to the hole 32. A cylindrical rotating roller 37 with a spherical circumferential surface is fitted into the second guide pin 34, and this roller 37 is fitted into a ring groove 34a formed at the tip of the pin 34. Removal from the pin 34 is restricted by a stopper ring 38.

On the other hand, a ring groove 1 for fitting a stopper ring 39, which will be described later, is also provided at the tip of the guide shaft 14.
4a is formed. Then, insert the second guide pin 34 into which the rotating roller 37 is inserted into the third guide hole 2.
0, and the hole 32 of the operation plate 31 is connected to the guide shaft 14.
By inserting the stopper ring 39 into the ring groove 14a of the guide shaft 14, the stopper ring 39 cooperates with the base plate 12 to close the operation plate 3.
1 and the actuating plate 17 are connected around the axial guide shaft 14.

The operating handle 5 is formed in a semicircular shape so as to surround half the circumference of the cap body 1, and has a hole 40 protruding from its end. The operating handle 5 is rotatably attached to the guide shaft 14 by inserting the hole 40 into the guide shaft 14 and fixing the bolt 41 to the operation plate 31. By the way, as shown in FIG. 1, the operating handle 5 is placed in a tightening position C in which it is directed toward the front lower part of the cap body 1 to press the shield plate 3 onto the sealing member 4 of the cap body 1 and close the window 2. , a loosening position where the shield plate 3 is directed toward the front of the cap body 1 and separated from the seal member 4;
U ₁ , U ₂ , the shield plate 3 is loosened toward the upper rear of the cap body 1, and the shield plate ₃ is rotated upward from the position U 2 to open the window 2 at the opening position O (see Fig. 5).
They are rotated between the two. Then, the fixed position of the operating handle 5 with respect to the operating plate 31 is selected so that the operating handle 5 occupies each of the above positions.

Note that the first and second guide pins and the guide shaft 2
The rotating rollers 26, 37, and 28 fitted into the rollers 5, 34, and 14, respectively, each have a spherical peripheral surface.

Next, the operation of this embodiment will be explained.

FIG. 4A shows a state in which the operating handle 5 is in the tightening position C, and in this state, the shield plate 3 is in close contact with the sealing member 4 attached to the window 2 of the cap body (the first (see figure).

First, the case where the handle 5 is rotated from the tightening position C to the loosening position _U1 shown in FIG. 4B will be described.

When the handle 5 is rotated clockwise in the figure, the second guide pin 34 also rotates in the same direction, but since the pin 34 is eccentrically fixed to the operation plate 31, it rotates diagonally downward in the front of the cap body 1. trying to shift to By the way, this second guide pin 34 is inserted into the elongated hole 20a of the actuating plate 17 via a rotating roller 37, and the side wall of the elongated hole 20a is pressed by the rotational torque at the time of shifting, and the actuating plate 17 is rotated clockwise. Try to rotate. However, the actuating plate 17 has an elongated second guide hole 19 that extends linearly from its center toward the front and upper side of the cap body 1, and the guide shaft 14 is inserted into the second guide hole 19. Therefore, the actuating plate 17 is shifted diagonally upward and forward of the cap body 1 along this guide shaft 14. Then, the plate 17 stops at a position where the starting end of the second guide hole 19 engages with the guide shaft 14, that is, a position where the center of the actuating plate 17 overlaps with the guide shaft 14. At this time, the second guide pin 3
4 is located at the end of the long hole 20a. By shifting the actuating plate 17, the shield plate 3 fixed to the plate 17 is separated from the sealing member 4 of the window 2.
At this time, the first
The guide pin 25 is inserted into the elongated hole 15b of the first guide hole 15 via the rotating roller 26, and as the actuating plate 17 moves, the elongated hole 15 moves inside the elongated hole 15b.
a Move to the bend at the starting end.

Next, loosen the operating handle 5 and move from position U ₁ to U _2.
When the second guide pin 34 is rotated until the elongated hole 2
It moves to the terminal position in the elongated hole 20b that extends bent from the terminal end of 0a (see arrow P in FIG. 4B).
At this time, the shield plate 3 remains at the release position B and does not move.

Furthermore, when the operating handle 5 is loosened and rotated upward from the position _U2 , the second
The guide pin 34 comes into contact with the end wall of the elongated hole 20b, presses the end wall surface, and attempts to rotate the actuating plate 17 around the guide shaft 14. Incidentally, an arc-shaped elongated hole 15a that extends in the vertical direction of the cap body 1 with the guide shaft 14 as the center is bored in the base plate 12, and the first guide pin 25 is inserted into this elongated hole 15a via a rotating roller 26. Because it is inserted so that it can be moved inside,
The actuation plate 17 rotates about the guide shaft 14, and the shield plate 3 also rotates upward accordingly. When the first guide pin 25 reaches the end of the elongated hole 15a, the rotation of the actuating plate 17 is stopped, and accordingly, the shield plate 3 is also stopped at the open position O. At this time, the window 2 of the cap body 1 is fully opened (see FIG. 5).

Next, when the operating bundle 5 is rotated downward from the tightening position O so as to close the window 2 again, the second guide pin 34 returns to the bending part at the starting end of the elongated hole 20b, and while coming into contact with the side wall of this bending part, the actuating bundle 17 in the opposite direction. And the first guide pin 25
When the operation handle 5 comes into contact with the side wall of the starting end bending part of the elongated hole 15a of the board 12, the operating handle 5 assumes the loosened position _U1 ,
When further rotated downward from here, the second guide pin 3
4 presses the side wall of the elongated hole 20a in the opposite direction to the rear and diagonally downward direction of the cap body, and the shield plate 3 also moves rearward and diagonally downward, that is, toward the window 2 side of the cap body 1. When the operating handle 5 is further rotated to the lowest position, the shield plate 3 is strongly pressed against the shield member 4, and thus is held at the operating position A in which it is firmly in close contact with the seal member 4.

By the way, as mentioned above, each rotating roller 26, 3
7 and 28 have spherical peripheral surfaces, so even if the first and second guide pins supporting them and the guide shafts 25, 34, and 14 are tilted with respect to the guide hole, these Each roller 26,3
Only the maximum circumferences of rollers 7 and 28 are always in contact with the inner wall of each guide hole 15, 20, and 19b corresponding to these rollers, and the state of contact with the inner wall of the hole is always maintained properly. Therefore, each of the guide pins 25, 34 and the guide shaft 14 are connected to the corresponding guide holes 15, 20, 1.
The shield plate 3 can be moved smoothly within the shield plate 9b, and the shield plate 3 can be operated properly.

C. Effects of the Invention As described above, according to the present invention, guide holes are formed in the left and right side walls of a helmet body having a window in the front, and guide pins are provided at both ends of the shield plate that interlocks with the operating handle. The guide pin is movably inserted into the guide hole via a rotating roller, and when the operation handle is operated, the guide pin moves within the guide hole, and the shield plate is inserted into the window of the cap body. In a helmet shielding device configured to be pressed against a sealing member attached to a peripheral edge, separated from the sealing member, or rotated above a cap body, the circumferential surface of the rotating roller is formed into a spherical surface. Therefore, even if the guide pin that supports the rotating roller is tilted with respect to the guide hole, the guide pin can move smoothly within the guide hole, and therefore the shield plate can operate properly. A certain degree of error is allowed, and therefore the number of manufacturing steps required is less than in the past, and the cost of the helmet can be reduced. Further, even if the guide pin is slightly tilted during use of the helmet, it does not affect the operation of the shield plate, so there is no need to correct the pin, which is practical.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of a helmet equipped with the shield device of the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. FIGS. 4A to 4C are explanatory diagrams of the operation of the shield device, and FIG. 5 is a side view showing the state in which the helmet window is opened. H...Helmet, 1...Cap body, 2...Window, 3
... Shield plate, 4 ... Seal member, 5 ... Operation handle, 14 ... Guide shaft, 15 ... First guide hole, 19 ... Second guide hole, 20 ... Third guide hole,
25...first guide pin, 34...second guide pin,
26, 28, 37...Rotating rollers.

Claims (1)

[Claims] 1. Guide holes are bored in the left and right side walls of a helmet body with a window opened on the front, guide pins are set up at both ends of a shield plate that interlocks with the operation handle, and the guide pins are inserted through rotating rollers into the The guide pin is movably inserted into the guide hole, and when the operation handle is operated, the guide pin moves within the guide hole, and the shield plate is pressed against a sealing member attached to the window periphery of the cap body, or the shield plate is pressed against a sealing member attached to the window peripheral portion of the cap body. 1. A helmet shielding device configured to be separated from a member or rotated above a cap body, characterized in that the peripheral surface of the rotating roller is formed into a spherical surface.