JP2859839B2 - Diving mask - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diving mask for securing visibility during diving, and more particularly to a diving mask having an improved belt mounting portion for use on a face.

[0002]

2. Description of the Related Art Heretofore, a mask skirt having a transparent plate fitted at its tip has been surrounded by a frame, the frame has been divided into an upper frame and a lower frame, and flanges have been provided on the upper and lower frames. The buckle is provided so as to increase the interval toward the rear, and the buckle is slid from the front to the rear with respect to the frame while engaging the ridge with a pair of grooves extending in the front-rear direction formed on the buckle. By doing so, the mask skirt is brought into close contact with the transparent plate by pulling both ends of the upper frame and the lower frame, and the end of the folded belt is continuously inserted into a pair of slits formed at the rear end of each buckle. By doing so, a diving mask in which a belt is connected to a buckle so as to be fastened and relaxed is known.

[0003]

However, in the above-mentioned diving mask, since the buckle does not rotate with respect to the frame, the angle of the belt with respect to the frame is limited, and the user can obtain an optimal fit. There was nothing.

Another problem is that it takes time to adjust the tightening force of the belt.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a diving mask which can provide an excellent fit and can easily adjust the tightening force of the belt.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention encloses a mask skirt on which a transparent plate is fitted with a frame, and divides the frame into an upper frame and a lower frame. Then, in a diving mask in which both ends of the upper frame and the lower frame are attracted to each other with a buckle and the mask skirt is brought into close contact with the transparent plate, and both ends of the belt are slidably connected to each buckle, the operation piece can be raised and lowered on the buckle. The buckle is rotatable with respect to the frame within a certain limit angle range when the operation piece falls down, and when the buckle is raised, the buckle can rotate beyond the limit angle. The frame and the buckle can be freely disengaged when the angle is exceeded.

A plurality of projections arranged in the length direction are formed on one side surface of the belt, and the operation piece is brought into contact with the projections to prevent the belt from being pulled out in the relaxing direction. In addition, a tongue piece for rotating the operation piece in the falling direction is provided.

Further, the operating piece is connected to the buckle via a thin hinge portion.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, a transparent plate 2 is fitted to the tip of a mask skirt 1, and the outer periphery of the fitted portion is surrounded by a frame 3. Buckles 4 are attached to both sides of the frame 3, and both ends of a belt 5 are slidably connected to each buckle 4.

The frame 3 is, as shown in FIG.
And a lower frame 7, and on both sides of the frame 3, a protrusion 8 composed of an upper half protrusion 8 a formed on the upper frame 6 and a lower half protrusion 8 b formed on the lower frame 7. Is provided. The upper frame 6 and the lower frame 7 are positioned with respect to each other by inserting a protruding shaft 9 provided on the upper surface of the lower half protrusion 8b into an engagement hole 10 formed on the lower surface of the upper half protrusion 8a. .

As shown in FIGS. 5 and 7, the protruding portion 8 has an arcuate surface 11 at the front edge, and a flat surface 12 extending in the front-rear direction at the upper and lower edges. I have.
Further, stopper surfaces 13 are formed on the rear edges of the upper half protruding portion 8a and the lower half protruding portion 8b, respectively. A flange 14 having an arc-shaped periphery is provided on the arc surface 11 and the flat surface 12.

As shown in FIGS. 6 and 7, the buckle 4 has an opening 15 on the front surface and an opening 1 on the back surface.
A recess 16 communicating with 5 is formed. This recess 16
The protruding portion 8 is inserted into the. An operation piece 17 is connected to the front end edge of the opening 15 via a thin hinge portion 17a.
Is provided with a claw 19 extending forward. The operation piece 17 is normally in a down state, and when the operation piece 17 is raised, the tip of the claw 19 comes into contact with the protruding portion 8.

A semicircular surface 20 extending along the flange 14 and a flat surface 21 extending tangentially from both ends thereof are formed on the inner periphery of the recess 16, and a flat surface is formed at the open end of the recess 16. An engagement wall 22 is provided extending from an end edge of the engagement member 21 in a vertical direction. When the engagement wall 22 engages with the flange 14, the protrusion 8 is prevented from falling out of the recess 16. The engagement wall 22 has an arc-shaped notch 23 having a diameter larger than that of the flange 14.

A guide piece 24 is provided between the rear ends of the engaging walls 22, and the end of the belt 5 is folded over the guide piece 24. On one side surface of the belt 5, a number of protrusions 25 arranged in the length direction are formed.
The tongue piece 26 engageable with the projection 25 and the tongue piece 2
6 and a ridge 27 located behind.

In the diving mask constructed as described above, the buckle 4 is attached to the frame 3 by the tongue 2 as shown in FIG.
6 can be rotated until the end of the belt 6 contacts the stopper surface 13, and the angle of the belt 5 with respect to the frame 3 can be changed within this range.

When the operation piece 17 is raised, the tongue piece 26 separates from the protruding portion 8, so that the buckle 4 can be rotated beyond the limit angle. Also, the projection 25 and the tongue piece 2
6 is released, the belt 5 can freely slide with respect to the buckle 4, and the tightening force of the belt 5 can be adjusted to an arbitrary strength. The raised operation piece 17 naturally falls down to a certain angle due to the elasticity of the claw 19 whose tip abuts the projection 8.

In the above state, the belt 5 is
When a pulling force acts on the tongue 2 in the relaxation direction,
6, the pulling out of the belt 5 from the buckle 4 is prevented, and at the same time, the operation piece 17 further falls down, and the projection 25 is sandwiched between the tongue piece 26 and the ridge 27 as shown in FIG. The belt 5 is securely fixed. Therefore, the belt does not loosen when worn.

In order to remove the buckle 4 from the frame 3, first, the operating piece 17 is raised and the buckle 4 is moved so that the guide piece 24 is positioned below the projecting portion 8 as shown in FIGS. 8 and 9. After turning approximately 90 °, slide upward. Then, as shown in FIG. 10, when the buckle 4 is rotated about the guide piece 24 in the direction in which the upper part is separated from the frame 3, the engagement wall 22 and the flange 14
And the buckle 4 is separated from the frame 3.

The buckle 4 is connected to the guide piece 24 by the protrusion 8.
After being rotated so as to be located above the frame 3, the lower part may be separated from the frame 3 by sliding downward.

The buckle 4 can be attached to the frame 3 by a procedure reverse to the above-described removal procedure.

[0022]

According to the present invention, as described above, the buckle can be rotated with respect to the frame within the limited angle range when the operation piece falls down, so that the angle of the belt with respect to the frame can be adjusted. , And a good fit is obtained.

Further, the buckle can be removed from the frame only when the operating piece is raised and the buckle is rotated beyond the limit angle, so that the buckle does not accidentally come off and is excellent in safety. Become.

Further, when the operation piece is provided with a tongue piece which can be engaged with the projection formed on the belt, the operation piece can be simply raised and lowered.
It is possible to switch between a state where the tightening force of the belt can be adjusted and a state where the belt is fixed.

In addition, when the operating piece is connected to the buckle via a thin-walled hinge portion and is integrally formed, it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a diving mask according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a partially cutaway side view of the above.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is an exploded perspective view showing an end of the frame.

FIG. 6 is a perspective view of a buckle.

FIG. 7 is a perspective view showing an end portion of the frame and a back surface of the buckle.

FIG. 8 is a diagram showing a state in which the buckle is rotated by 90 °

FIG. 9 is a schematic sectional view taken along the line IX-IX of FIG.

FIG. 10 is a schematic sectional view showing a process of removing a buckle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mask skirt 2 Transparent plate 3 Frame 4 Buckle 5 Belt 6 Upper frame 7 Lower frame 17 Operation piece 17a Hinge part 25 Projection 26 Tongue piece

Claims (3)

(57) [Claims] An outer periphery of a mask skirt on which a transparent plate is fitted is surrounded by a frame, and the frame is divided into an upper frame and a lower frame,
In a diving mask in which both ends of the upper frame and the lower frame are pulled together with a buckle and the mask skirt is brought into close contact with the transparent plate, and both ends of the belt are slidably connected to each buckle, an operation piece is provided on the buckle so as to be able to move up and down. The buckle with respect to the frame body is rotatable within a certain limited angle range when the operation piece falls down and over the limit angle when raised, and the rotation angle of the buckle with respect to the frame body sets the limited angle. A diving mask characterized in that the frame and the buckle can be freely disengaged when it is over. 2. A plurality of protrusions arranged in a length direction are formed on one side surface of the belt, and the operation piece is brought into contact with the protrusions to prevent the belt from being pulled out in a relaxation direction. 2. The diving mask according to claim 1, further comprising a tongue for rotating the operation piece in the falling direction. 3. The diving mask according to claim 1, wherein the operation piece is connected to a buckle via a thin hinge portion.