JP4382169B2 - Protective glasses - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to protective glasses for swimming, for motorcycle riders, for industrial safety and the like.
[0002]
[Prior art]
Speaking of protective goggles, especially the swimming goggles, the conventional goggle itself has only a hard eyecup (non-cushion type) and a soft resin cushion joined to the back (face-to-face) of the eyecup. It is divided roughly into.
[0003]
In this latter case, a cushion formed by punching out a sheet of foamed chloroprene rubber, foamed silicone rubber or the like is bonded to an eye cup with an adhesive, and an elastomer or silicone rubber molded by an injection molding method is fitted. Alternatively, there is a method (molded cushion) that is molded integrally with the eye cup by an insert molding method.
In the case of this molded cushion, the bonding strength becomes a problem. If the joint is not properly performed, the cushion may fall off during use or an air gap may be formed between the eye cup and the watertightness of the swimming goggles. As a countermeasure against such a problem, a rib is provided in the groove of the cushion as in Japanese Utility Model Publication No. 7-17327, and a groove narrower than this rib is provided in the flange portion of the eye cup, and the rib is formed into a narrow groove. Proposals have been made to obtain a good adhesion state by pressure fitting and to secure water tightness.
[0004]
However, in recent years, when the insert injection molding method, which is also generalizing the bonding of eye cups and cushions, is used to bond different types of materials, the required bonding strength cannot be obtained depending on the combination of the types. Not a few.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide protective glasses capable of obtaining a good joined state between the cushion portion 3 and the lens peripheral wall portion 6 with respect to a problem that occurs when the molded cushion is joined to the eye cup.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention takes the following technical means. That is, the first technical means is joined to the pair of left and right eye cups 1 each having a front lens part 5 and a lens peripheral wall part 6 extending rearward from the periphery of the lens part 5. and it comprises a nose belt 2 for connecting the cushion unit 3 and the left and right eye cup 1, the Rukoto cushioning member 3 is formed integrally with respect to the eye cup 1 which is inserted into a pre-mold by injection molding, the lens peripheral wall in the protection glasses and parts 6 and the cushion unit 3 are joined, the junction surface between the cushion portion 3 and the cushion unit lens peripheral wall 6 whose outer periphery is embraced in 3, the rear surface 16 of the lens peripheral wall 6 said lens unit toward the 5 side provided over a range exceeding the longitudinal direction center, of the total area of the junction surface between the cushion portion 3 and the lens peripheral wall 6, the rear surface of the lens peripheral wall 6 Area of the lateral joint surface 7 along the outer side surface of the lens peripheral wall portion 6 except the rear bonding surface 8 along the 6, is larger than the area of the rear joint face 8, the lateral in the lens peripheral wall 6 The outer surface excluding the joint surface 7 is an inclined surface that is inclined so as to gradually increase in diameter as it advances backward, and the outer surface on the front side of the cushion portion 3 gradually increases as it advances backward. by being an inclined surface which is inclined rearwardly spread so that the diameter, that has an outer surface of the lens peripheral wall 6 and a cushioning member 3 of the joint portion of the cushion unit 3 and the lens peripheral wall 6 is flush It is characterized by that.
[0007]
Therefore, when the cushion part 3 is integrally formed by the injection molding method with respect to the eye cup 1 inserted in the mold in advance, it is useful for producing a uniform and high efficiency.
The area of the lateral joint surface 7 along the side surface of the lens peripheral wall 6 is increased, the resistance becomes larger with respect to easily peel force occurs in the tangential direction of the side surface of the (1) lens circumferential wall portion 6, (2) Results Specifically, the total area of the cemented surface increases, and the cushion portion 3 and the lens peripheral wall portion 6 are firmly fixed.
[0008]
Further, the area of the side joint surface 7 along the outer side surface of the lens peripheral wall portion 6 excluding the rear joint surface 8 along the rear surface 16 of the lens peripheral wall portion 6 is the area of the rear joint surface 8 along the rear surface of the lens peripheral wall portion 6. (1) The resistance to the peeling force that tends to occur in the tangential direction of the side surface of the lens peripheral wall 6 is increased, and (2) the total area of the joint surface is also increased as a result. The cushion part 3 and the lens peripheral wall part 6 are firmly fixed.
[0009]
Further, by the lateral joint surface 7 and the outer lens peripheral wall 6, (1) together with the cushion unit 3, which is an elastic material is extremely strong bonding becomes a structure that embrace the eyecup 1 periphery, (2) Even when a gap is partially generated, the cushion portion 3 is in close contact with the eye cup 1 by water pressure during use as underwater glasses, and water tightness is maintained.
Moreover, when the outer surface of the lens surrounding wall part 6 and the cushion part 3 is flush | planar, especially in the case of underwater spectacles for swimming, the fluid resistance in water is made small.
[0010]
Second technical means is the side bonding surface 7 along a side surface of the lens peripheral wall 6, so that the recess 9 which is recessed in the lens peripheral portion 6 side to surround substantially the entire circumference of the side surface of the lens peripheral wall 6 It is characterized by being formed.
Therefore, when the concave portion 9 recessed on the lens peripheral wall portion 6 side is formed so as to surround substantially the entire circumference of the side surface of the lens peripheral wall portion 6, the corresponding convex portion of the cushion portion 3 is engaged with the joint surface. As a result, adhesion is enhanced.
[0011]
A third technical means is characterized in that non-adhesive zones 15 is not bonded to the inside of the rear surface of the lenses peripheral wall 6 in the cushion unit 3 is remaining, the remaining regions of the rear surface is said rear joining surface 8 It is said.
Therefore, in the case of the insert molding method, the cushion material injected at the time of the insert molding is formed by leaving a small non-joining area 15 inside the rear face of the lens peripheral wall portion 6 and making the remaining area of the rear face the rear joining face 8. There is an effect of preventing leakage to the inner surface of the cup 1.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described according to the illustrated embodiments. 1 to 3 show an embodiment. In the figure, the swimming goggles are composed of a pair of left and right eye cups 1, a nose belt 2 connecting these eye cups 1, a cushion portion 3 contacting the face, a belt 4 for wearing, and the like.
[0013]
As shown in FIGS. 1 and 2, the eye cup 1 includes a front lens portion 5 and a lens peripheral wall portion 6 extending rearward from the periphery of the lens portion 5.
The cushion part 3 and the lens peripheral wall part 6 are joined to each other, and the joint surface between the cushion part 3 and the lens peripheral wall part 6 exceeds the center in the front-rear direction from the side edge of the rear surface 16 of the lens peripheral wall part 6 as shown in FIG. The joint surface has a side joint surface 7 along the side surface of the lens peripheral wall portion 6 and a rear joint surface 8 along the rear surface of the lens peripheral wall portion 6, and the cushion portion 3 and the lens. Of the total area of the joint surface with the peripheral wall portion 6, the area of the side joint surface 7 along the side surface of the lens peripheral wall portion 6 is larger than the area of the rear joint surface 8 along the rear surface of the lens peripheral wall portion 6. Yes. The side joint surface 7 along the side surface of the lens peripheral wall portion 6 is provided on the outer side of the lens peripheral wall portion 6. Therefore, the cushion portion 3 has a structure for embedding the outer periphery of the eye cup 1. In addition, the outer surface of the lens peripheral wall 6 and the cushion 3 at the joint between the cushion 3 and the lens peripheral 6 is flush. In addition, as understood from the above description, the cushion portion 3 referred to in the present application includes a later-described fin portion 17 that performs a cushioning action and a front portion that functions to join the eye cup 1.
[0014]
A concave portion 9 that is recessed toward the lens peripheral wall portion 6 is formed on the side joint surface 7 so as to surround substantially the entire circumference of the side surface of the lens peripheral wall portion 6. Further, as shown in FIG. 1, a concave portion 10 serving as a joint surface is provided on the rear surface of the lens peripheral wall portion 6 near the ear direction, and the side wall portion 13 of the total area of the joint surface inside the concave portion 10 is provided. The area is larger than the area of the bottom wall portion 14. Further, as shown in FIG. 3, a small non-bonding region 15 is left inside the rear surface of the lens peripheral wall portion 6, and the remaining region on the rear surface is used as the rear bonding surface 8.
[0015]
The eye cup 1 is formed of a hard transparent material such as polycarbonate or cellulose propionate, and the cushion portion 3 includes a portion to be joined to the eye cup 1 and is the same material, that is, nylon, urethane, styrene, or the like. Made of soft synthetic resin such as elastomer and silicone.
As for the connection between the nose belt 2 and the eye cup 1 and the connection between the eye cup 1 and the belt 4, a known technique is selected as appropriate, but the flow resistance value is small, and the fit property is not hindered. Adopt things.
[0016]
The eye cup 1 and the cushion part 3 can be joined and integrated only by fitting or by bonding using an adhesive, but the pre-formed eye cup 1 is inserted into the mold and the mold cavity is inserted. It is preferable that the cushion material for forming the cushion portion 3 is injected and molded integrally with each other in terms of strong integration and good finish.
[0017]
It is desirable that the area of the side joining surface 7 along the side surface of the lens peripheral wall portion 6 is not less than one third and not more than two thirds of the total area of the outer surface of the lens peripheral wall portion 6. If it exceeds 2/3, the cemented surface becomes too close to the lens surface, and chemical treatment of the cement is applied to the antifogging layer on the lens inner surface. Since the field of view may be adversely affected or the field of view may be narrowed by an opaque cushioning material, it is advantageous to make it less than two-thirds.
[0018]
When leaving the small non-bonding region 15 inside the rear surface of the lens peripheral wall portion 6, the width is preferably in the range of 0.2 mm to 1 mm. If it is less than 0.2 mm, the cushion material injected at the time of insert injection molding leaks inward from the joining area and may cause burrs, thereby hindering the field of view. On the other hand, if it exceeds 1 mm, the joining area on the rear surface becomes narrow and the fixation becomes weak.
[0019]
It is preferable that the tip 17a of the fin portion 17 with which the cushion portion 3 abuts on the face end within the inner surface of the extended surface 18 of the outer surface of the lens peripheral wall portion 6. It is too long and has the effect of preventing the water flow resistance from increasing when worn out.
In the above-described embodiment, one concave portion 10 as a joint surface is provided on the rear surface of the lens peripheral wall portion 6 near the ear direction. Instead, the rear surface of the lens peripheral wall portion 6 near the ear direction is provided. In addition, two or more concave portions 10 as a joint surface are provided, or the concave portions 10 are formed in a string shape when viewed from the rear view, thereby increasing the joint area between the cushion portion 3 and the lens peripheral wall portion 6. Is preferred.
[0020]
【The invention's effect】
According to the present invention, a good joined state between the cushion portion 3 and the lens peripheral wall portion 6 can be obtained.
[Brief description of the drawings]
FIG. 1 is a half-sectional plan view showing an embodiment of the present invention.
FIG. 2 is a front view of the same.
3 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Eye cup 2 Nose belt 3 Cushion part 4 Belt 5 Lens part 6 Lens peripheral wall part 7 Side joint surface 8 Back joint surface 9 Recess 10 Depressed part 13 Side wall part 14 Bottom wall part 15 Non-joint area 16 Rear surface 18 The outer surface is extended. Face

Claims (3)

A pair of left and right eye cups (1) having a front lens part (5) and a lens peripheral wall part (6) extending rearward from the periphery of the lens part (5 ) are joined to each eye cup (1). cushion part (3) and the left and right eye cup (1) comprises a nose belt (2) for concatenating the cushion portion by injection molding to eye cup that is inserted into a pre-mold (1) (3) the Rukoto are integrally formed, the protective eyewear lens peripheral wall (6) and the cushion portion (3) and are joined,
The cushion portion (3) and said cushion portion (3) at the interface between the outer periphery thereof embraced lens peripheral wall (6), the lens portion from the surface (16) after the lens peripheral wall (6) ( 5) provided over a range exceeding the longitudinal direction center toward the side,
Of the total area of the joint surface between the cushion portion (3) and the lens peripheral wall portion (6), the lens peripheral wall portion (6) excluding the rear joint surface (8) along the rear surface (16) of the lens peripheral wall portion (6). area of the lateral joint surface along the side surface of the outer (7)) is larger than the area of the rear bonding face (8),
The outer surface of the lens peripheral wall portion (6) excluding the side joining surface (7) is an inclined surface that is inclined so as to expand rearward so as to gradually increase in diameter as it advances backward,
And the outer surface on the front side in the cushion part (3) is an inclined surface that is inclined to spread rearward so as to gradually increase in diameter as it advances backward,
The outer surface of the lens peripheral wall portion (6) cushion portion (3) that is flush at the joint portion of the cushion portion (3) lens peripheral wall (6)
Protection glasses, wherein a call. The lens peripheral wall side joining surface along the side of (6) (7), the lens peripheral wall (6) concave recessed side (9) surrounds the substantially entire circumference of the side surface of the lens peripheral wall (6) The protective glasses according to claim 1, wherein the protective glasses are formed as described above. A non-joining area (15) that is not joined to the cushion part (3) is left inside the rear face of the lens peripheral wall part (6), and a remaining area of the rear face is the rear joining face (8). The protective glasses according to claim 1 or 2.

Images