JPH04100911A - Structure for installing shielding plate of helmet - Google Patents

Abstract

PURPOSE:To install a shielding plate in installing substrates without using screw threads such as screws or covers by connecting the installing substrates to the shielding plate using engagement of supporting cylinders with pivoting shafts and bayonet mechanisms and molding the shielding plate from a light transmitting synthetic resin. CONSTITUTION:Supporting cylinders 10 and pivoting shafts 35 are mutually engaged and a shielding plate 4 is rotated to keep bayonet mechanisms (B1) and (B2) in a connected state. Thereby, the shielding plate is installed in installing substrates 7. The shielding plate is light-transmitting and alignment of the supporting cylinders with the pivoting shafts and bayonet mechanisms is precisely carried out by seeing through from the outside.

Description

Detailed Description of the Invention A9 Object of the Invention (1) Industrial Field of Application The present invention provides a shield plate attached to a mounting board fixed to the outer surface of a cap body, and the shield plate is fixed to the outside surface of the cap body to fully open the window of the cap body. The present invention relates to a structure for mounting a shield plate in a helmet so that it can be mounted so as to be rotatable between a fully closed position and a fully closed position.

(2) Prior Art Conventionally, in this type of shield plate mounting structure, screws and covers have been used to prevent the shield plate from coming off from the mounting board (see, for example, Japanese Utility Model Publication No. 15314/1983).

(3) Problems to be Solved by the Invention Generally speaking, in helmets, the shield plate may be replaced with a clear type, sunshade type, etc. depending on the user's preferences and usage conditions, and the conventional structure described above is not sufficient. For example, screws and covers must be attached and detached each time they are replaced, which is not only troublesome, but there is also the risk of losing the screws or damaging the cover by dropping it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shield plate mounting structure that allows the shield plate to be attached and detached from the mounting board without using screws or covers. do.

B1 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a support tube and a pivot shaft that can be rotatably fitted to one and the other of the mounting board and the shield plate. and a bayonet mechanism is provided between the mounting board and the shield plate to connect the two so that they can be separated by their relative rotation, and the support tube, pivot, and bayonet mechanism can be seen through from the outside. The entire shield plate is made of transparent synthetic resin.

(2) Effects According to the above configuration, by fitting the support tube and the pivot into each other, and then moving the shield plate once, the propellant mechanism is brought into the connected state. In this way, the shield plate is attached to the mounting board. At this time, since the entire shield plate is translucent, the support tube, pivot, and bayonet mechanism can be accurately aligned by seeing through from the outside.

(3) Examples An embodiment of the present invention will be described below with reference to the drawings.

In the first part of this article, in order to open and close the window 3 opening in the front wall of the cap body 2 of the full-face helmet 1, the left and right ends of the shield plate 4 were equipped with the mounting structure of the present invention. 5 so that it can be rotated vertically. The entire shield plate 4 including both ends is molded from transparent or translucent synthetic resin.

The mounting structure 5 will be explained with reference to FIGS. 2 to 6. As shown in FIGS. 2 and 4, a shallow recess 6 is formed on the left and right outer surfaces of the cap body 2, and a mounting board 7 made of synthetic resin is attached to the bottom of this recess 6 with screws 8 and 9 attached at two upper and lower locations. It is fixed by

As shown in FIGS. 2 and 6, a support tube 10 is integrally formed on the surface of the mounting board 7 so as to surround the upper screw 8. As shown in FIGS. A wide first notch 1 is provided at the upper part of the inner wall of this support tube 10.
1, and a narrow second notch 12 is provided at the lower part of the inner wall, and an eave-like small projection 13 (see FIG. 4) is formed at the upper edge of the center portion of the first notch 11. Further, the inner wall of the support tube 10 has a first locking groove 17 extending downward from the front end of the first notch 11 and a second locking groove 17 extending upward from the rear end of the second notch 12.
A locking groove 18 is provided.

Furthermore, on the surface of the mounting board 7, there are a pair of guide walls 14.14 extending straight downward from the support tube 10 with the second notch 12 in between.
' are provided protrudingly, and intermediate portions of these guide walls 1414' are interconnected by a connecting wall 15.

A temporary fixing member 16 whose vertical sliding is guided by these guide walls 14, 14' is disposed between the guide walls 14, 14'. This temporary fixing member 16 has a claw 16a at the upper end facing the second notch 12 and bent toward the bottom side of the support tube 10, and a claw 16b rising toward the outside of the mounting board 7 at the lower end. The upper edge of the tip of the claw 16a is formed into a slope 19 (see FIG. 4).

As shown in FIG. 4, the temporary fixing member 16 is further provided with a vertically long elongated hole 22 into which the protrusion 21 of the connecting wall 15 is inserted. 21 abuts against each other, the operating position of the temporary fixing member 16 that aligns the upper edge of the pawl 16a with the inner wall of the support tube 10 is regulated.
The release position of the temporary fixing member 16 that allows the member a to be removed from the support tube 10 is regulated. A coil spring 23 is provided between the temporary fixing member 16 and the connecting wall 15 to bias the temporary fixing member 16 toward the operating position.

Referring again to FIGS. 2 and 6, the mounting board 7 is further provided with an arc-shaped projecting wall 24 that is concentric with the support tube 10 and has a larger diameter than the guide wall 14. The front end is connected to a lip 25 extending from the outer peripheral surface of the support tube 10, and the rear end is connected to the guide wall 14. A third locking groove 26 is provided on the outer circumferential surface of this arcuate protruding wall 24 .

The third locking groove 26 has an open end on the side of the lip 26 as an entrance, and a small arc-shaped temporary locking pawl 27 protrudes from the mounting board 7 adjacent to this entrance. This temporary fixing nail 27
The claw portion faces outward in the radial direction, and has a slope 2 on the upper edge.
7a is formed. The projecting wall 24 and the temporary fixing claw 27
A lip 25' extending parallel to the lip 25 so as to surround the same, and an arc-shaped surrounding wall 29 concentric with the projecting wall 24 are formed on the mounting board 7.

Furthermore, an elastic arm 30 is provided on the mounting base plate 7 and extends forward from the guide wall 14 on the radially outer side of the surrounding wall 29, and this elastic arm 30 has one or more clink teeth on the outer surface of its free end. It is equipped with 31.

Furthermore, on the surface of the mounting board 7, a first fixed stopper 32 located at the front outside the elastic arm 30 and a second fixed stopper 33 located at the rear are protruded. The first fixed stopper 32 has a slope 32a on the front side and a vertical surface 32 on the rear side.
b, and the second fixed stopper 33 has slopes 3 on the front and back.
3a and 33b.

On the other hand, the support tube 1 is provided on the inner surface of each left and right end of the shield plate 4.
A pivot shaft 35 that can be loosely fitted into the 0 is integrally provided in a protruding manner.

The first and second notches 11,
Flange-shaped first and second locking pawls 36.37 that can be engaged with the first and second locking grooves 17.18 are formed through 12, and the outer peripheral edges of these locking pawls 36.37 are sloped. 36a, 3
It is now 7a.

Therefore, the first axis of the axis 35. the second locking pawl 36 , 37 and the first locking pawl 36 , 37 of the support tube 10 . The second notch 1112 and the first notch 1112. The second locking grooves 17 and 18 constitute a first bayonet mechanism B that connects the mounting board 7 and the shield plate 4 in a separable manner.

Furthermore, each end of the shield Fi4 is provided with the temporary fixing claws 27.
and a third locking pawl 38 that can be sequentially engaged with the third locking groove 26; a large number of click teeth 39, 39... that cooperate with the click teeth 31 of the elastic arm 30; Two fixed stoppers 32, 33 and a cooperating movable stopper 40 are integrally formed. The third locking claw 38 has a slope 38a on the claw portion.

Therefore, the third locking groove 26 of the mounting board 7 and the shield plate 4
The third locking pawl 38 constitutes a second bayonet mechanism B2 that connects the mounting board 7 and the shield plate 4 in a separable manner.

A large number of click teeth 39, 39, .

The movable stopper 40 is formed in a cross-sectional shape, and
One end is connected to the connecting wall 41 .

Next, the operation of this embodiment will be explained.

To attach the shield plate 4 to the cap body 2, first, as shown in FIG. When the centers of the support tubes 10 of the substrate 7 are aligned with each other,
1st. The second locking pawl 36,37 is connected to the first locking pawl 36,37 of the support tube 10. It comes to a position where it can enter the second notches 11 and 12. Further, the third locking pawl 38 comes to a position where it can be engaged with the temporary locking pawl 27. Therefore,
When the outer surface of the end of the shield plate 4 is strongly pressed toward the mounting board 7 so as to fit the pivot 35 into the support tube 10, the first
The locking pawl 36 enters the first notch 11 and the slope 36a
while sliding it onto the small protrusion 13, and also the second locking claw 3.
7 enters the second notch 12 and presses the slope 19 of the temporary fixing member 16 with the slope 37a, thereby fixing the temporary fixing member 16.
is once retreated to the non-operating position against the biasing force of the spring 23, and when the second locking pawl 37 is completely fitted into the second notch 12, the temporary fixing member 16 returns to the operating position by the biasing force of the spring 23. Then, the pawl 16a is secured to the second locking pawl 37.

Further, the pressing force of the end of the shield plate 4 against the mounting board 7 also acts on the third locking pawl 38, so that the pawl 38 presses its slope 38a against the slope 27a of the temporary locking pawl 27 and mutually elastically deforms. , and engages with the temporary fixing pawl 27. In this way, the shield plate 4 is temporarily fixed to the mounting board 7.

Next, by rotating the shield plate 4 downward around the pivot 35 supported by the support tube 10, when the movable stopper 40 climbs the slope 32a of the first fixed stopper 32, the end of the shield plate 4 will move outward. Although a slight elastic deformation occurs, the temporarily fixed state of the shield plate 4 is maintained. And movable stopper 4
0 gets over the first fixed stone bar 32, the shield vj,
4 returns to its original shape so that the movable stopper 40 faces the vertical surface 32b of the first fixed stopper 32 (see FIG. 7).

During this time, the first. The second retaining pawl 36.37 is the first retaining pawl 36,37 of the support tube 10.
．． The third locking pawl 38 is guided by the temporary locking pawl 27 and the third locking groove 26 is engaged with the second locking groove 17 and 18, respectively.
is brought into engagement position with.

The third locking pawl 38 engaged with the third locking groove 26 is connected to the surrounding wall 29
radially outward displacement is prevented, and separation from the third locking groove 26 is prevented. Thus, the first. The second bayonet mechanisms B, , B2 are in a connected state, and the installation work of the shield plate 4 is completed.

After the installation of the shield plate 4 is completed, if the shield plate 4 is rotated upward to fully open the window 3 of the cap body 2, the movable stopper 40
comes into contact with the vertical surface 32b of the first fixed stopper 32, and the fully open position of the shield plate 4 is restricted. Such regulation prevents the locking claws 36, 37.degree. 38 from escaping from the locking grooves 17, 18, 26, and secures the attached state of the shield plate 4.

When the shield plate 4 is rotated to the lowermost fully closed position to fully close the window 3 (see Fig. 1), the movable stopper 40 moves to the second position.
After getting over the front slope 33a of the fixed stopper 33, the inward restoring force of the end of the shield plate 4 engages the rear slope 33b, so that the engagement force holds the shield plate 4 in the fully closed position. .

In addition, in the rotation range of the shield plate 4 from the fully open position to the fully closed position, the click tooth 31 engages with any one of the many click teeth 39, 39, etc. due to the elasticity of the elastic arm 30, and the click teeth 39, 39, etc. The shield plate 4 can be held at any rotational position by the resultant force.

When removing the shield plate 4 from the cap body 2, first move the shield plate 4 from the fully open position by deforming the side part of the shield plate 4 outward to avoid interference between the movable stopper 40 and the first fixed stopper 32. The first fixed stopper 32 is rotated slightly upward to receive the first fixed stopper 32 in the L-shaped movable stopper 40 .

In this way, the shield plate 4 is returned to the above-mentioned temporarily fixed state (shape Di in FIG. 3).

Next, the user hooks his/her finger on the camera 16b and pulls down the temporary fixing member 16, thereby releasing the claw 16a of the temporary fixing member 16 from the second fixing claw 37.

In this state, if the end of the shield plate 4 is strongly pulled outward, the first locking claw 36 will move from the small protrusion 13 to the third locking claw 3.
8 are forcibly removed from the temporary fixing claws 27, respectively. In this way, the end portion of the shield plate 4 is removed from the mounting board 7.

By the way, since the shield plate 4 is transparent or translucent not only at its center but also at both left and right ends, when attaching or removing the shield plate 4, the relative positional relationship of each part of the mounting structure 5 can be checked through the shield plate 4. It can be visually checked, and therefore the attachment/detachment work can be done easily and accurately. There is also the convenience of being able to visually check whether there is any failure in the mounting structure 5 while the shield plate 4 is still attached.

Note that the present invention is applicable not only to full-face type helmets but also to other types, such as jet-type ones.

The mounting board 7 side element of the mounting structure 5 in the above embodiment may be provided on the shield plate 4, and the shield plate 4 side element may be provided on the mounting board 7, respectively.

C0 Effects of the Invention As described above, according to the present invention, a support tube and a pivot shaft that can be rotatably fitted to each other are formed on one and the other of the mounting board and the shield plate, and the mounting board and the shield A bayonet mechanism is provided between the plates to connect the two so that they can be separated by their relative rotation, and the entire shield plate is made of transparent synthetic resin so that the support tube, pivot, and bayonet mechanism can be seen from the outside. Since the shield plate is formed by molding, the shield plate can be connected to the mounting board by an extremely simple operation of rotating the shield plate. In this case, since the support tube, pivot, and bayonet mechanism can be seen from the outside of the shield plate,
These positions can be easily and precisely matched, and this can greatly contribute to improving the ease of attaching the shield plate.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of a helmet with the shield plate fully closed; FIG. 2 is an enlarged side view of the main parts of the helmet with the shield plate removed; Figure 3 is an enlarged side view of the main part of the helmet with the shield plate temporarily attached, Figures 4 and 5 are IV-IV of Figure 3.
6 is an exploded perspective view of the shield plate mounting structure, and FIG. 7 is an enlarged side view of the main part of the helmet with the shield plate fully open. B+, Bz...bayonet mechanism l...helmet, 2...cap body, 3...window, 4...
...Shield plate, 5...Mounting structure, 7...Mounting board, 10...Support, 35...Pivot Figure 1 Figure 3 jiiZ Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] The shield plate (4) is attached to the mounting board (7) fixed to the outside of the cap body (2), and the window (3) of the cap body (2) is fully opened in the fully open position and the window (3) is fully closed in the fully closed position. In a shield plate mounting structure for a helmet, the mounting board (7) and the shield plate (4) are mounted so as to be rotatable between the mounting board (7) and the shield plate (4).
A support tube (
10) and a pivot (35), respectively, and between the mounting board (7) and the shield plate (4), both (7, 4) are formed.
) is provided with a bayonet mechanism (B_1, B_2) that separably connects the support tube (10) by their relative rotation.
, pivot (35) and bayonet mechanism (B_1, B_2)
A shield plate mounting structure for a helmet, characterized in that the entire shield plate (4) is molded from a translucent synthetic resin so that the shield plate (4) can be seen through from the outside.