JPH0178128U

JPH0178128U -

Info

Publication number: JPH0178128U
Application number: JP1987170692U
Authority: JP
Priority date: 1987-11-10
Filing date: 1987-11-10
Publication date: 1989-05-25
Anticipated expiration: 2002-11-10
Also published as: JPH0523537Y2

Description

[Brief explanation of the drawing]

第１図は、本考案の微開放機構を具えたシール
ド板開閉装置の分解斜視図、第２図ａ，ｂは、本
考案の微開放機構の作用を説明するための側面図
、第３図は、従来のシールド板開閉装置の分解斜
視図、第４図は、ラチエツトベースの構造を示す
側断面図、第５図は、同じく平面図である。１…帽体、２…凹部、３…ラチエツトベース、
４…ボス、５…舌片、６…係合突起、９…シール
ド板、１０…開口、１１…係合孔、１２…ラチエ
ツトカバー、１５…ねじ、２０…アーム、２１…
凸出部、２２，２３…壁、２４…空間。 Fig. 1 is an exploded perspective view of a shield plate opening/closing device equipped with a micro-opening mechanism of the present invention, Figs. 2a and b are side views for explaining the operation of the micro-opening mechanism of the present invention, and Fig. 3 FIG. 4 is an exploded perspective view of a conventional shield plate opening/closing device, FIG. 4 is a side sectional view showing the structure of the ratchet base, and FIG. 5 is a plan view. 1...cap body, 2...recess, 3...ratchet base,
4... Boss, 5... Tongue piece, 6... Engaging protrusion, 9... Shield plate, 10... Opening, 11... Engaging hole, 12... Ratchet cover, 15... Screw, 20... Arm, 21...
Convex portion, 22, 23...wall, 24...space.

Claims

[Claims for Utility Model Registration] (1) A ratchet base 3 having an engaging protrusion 6 in a recess 2 provided on the side surface of a cap body 1 of a helmet.
A shield plate 9 having a plurality of engagement holes 11 in the end region is placed on top of the shield plate 9, and the engagement protrusion 6 and the engagement hole 11 are fitted together. The area is covered with a ratchet cover 12, which is attached to the cap body 1 by a screw 15 penetrating the entire area, and the shield plate 9 is rotatably supported around the screw 15, so that the engaging protrusion 6 and the engagement hole 11, the shield plate 9
In the shield plate opening/closing device which provides a plurality of rotational positions including a closed position, an elastically deformable arm 20 having a protrusion 21 is integrally extended in the end region of the shield plate 9. On the other hand, a shield plate 9 is provided on the inner surface of the ratchet cover 12.
A micro-aperture mechanism for a shield plate, characterized in that locking portions 22 and 23 that can engage with the protruding portion 21 are provided on a path from the closed position to the next rotational position. (2) The arm 20 is elastically deformed in the same plane as the end region of the shield plate 9, and the locking portion is a U-shaped parallel structure vertically erected on the inner surface of the ratchet cover 12. The micro-aperture mechanism of the shield plate according to claim 1, wherein the protruding portion 21 climbs over one of the parallel walls 22 and is locked in the space between both walls. .