Apparel – Guard or protector – For wearer's head
Reexamination Certificate
2000-01-18
2001-02-27
Nerbun, Peter (Department: 3741)
Apparel
Guard or protector
For wearer's head
C002S441000
Reexamination Certificate
active
06192523
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to structural improvement of a diving mask, especially, to structural improvement of the assembly between the lens and the main frame, or sub-frame for a diving mask.
BACKGROUND OF THE INVENTION
The conventional manufacturing method of a diving mask, which is connecting the lens with materials such as plastics (silicone etc.) when in moulding, then connect to a main frame and skirt (as shown in FIG.
1
), has at least the following disadvantages:
1. The lens is damageable when removing or exchanging the lens having for different sighted degrees (such as nearsighted, farsighted, presbyopic . . . ) or because it is difficult to reassemble, as a result a leaking phenomenon occurs at the edge of the lens.
2. The plastic is closely connected with the lens because the lens (or glass) is directly placed into the die cavity during injection. The thickness of glass due to tolerance is not easily controlled in a certain range, and because there are some problems relating to heat-expanding and cold-contracting during injection, which causes undesired breaking and a latent danger for the eyes of a user.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a structure of a diving mask consisting of a main frame, a sub-frame, a lens and a skirt which can be removed or assembled in order to exchange the lens or process the lens, which has still a stable structure after assembly and does not cause damage of leakage.
The technical solution embodying the above-mentioned object of the present invention is as below. The structural improvement of the diving mask which consists of a main frame, a sub-frame, a lens and a skirt, wherein there are fitting slots provided on the main frame and protrusions on the sub-frame. Tenons are provided on the sub-frame and mortises on the lens, and a soft connecting edge is provided on the skirt which can be closely connected with the periphery of lens. A rigid structure is established by means of the tenon jointing the sub-frame with the lens, the connecting frame of the skirt is closely connected with the periphery of the lens when the main frame is connected with the sub-frame. The above-mentioned construction allows the diving mask removal and keeps still a stable connecting state after its assembly. The mortises on the lens and the tenons on the sub-frame can be connected to each other, the quantity and positions of mortises provided on the lens and tenons provided on the sub-frame can be 1~10 groups.
REFERENCES:
patent: 2706815 (1955-04-01), Parmelee
patent: 2846684 (1958-08-01), Hill
patent: 3505680 (1970-04-01), Ring
patent: 5564132 (1996-10-01), Kuo
patent: 5682621 (1997-11-01), Park
Dougherty & Troxell
Nerbun Peter
QDS Injection Molding Inc.
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