WO2000024287A1

WO2000024287A1 - Easily transported contact lens care kit

Info

Publication number: WO2000024287A1
Application number: PCT/US1999/025054
Authority: WO
Inventors: Aaron T. Travis
Original assignee: Travis Aaron T
Priority date: 1998-10-26
Filing date: 1999-10-25
Publication date: 2000-05-04
Also published as: CA2346302A1; EP1143823A1; JP2003504647A; US6318548B1; US6244430B1

Abstract

A portable contact lens and fluid storage kit (10, 20) comprising a generally conventional lens case (10) adapted to receive a quick-detachable key ring attachment device (30) so that the case may be carried with a set of keys in a convenient and hard to forget fashion. The key chain attachment device is easily detached so that the case may be separated from the keys and rested on a flat surface during contact lens insertion and removal. In a further form, the invention comprises removable, sealed fluid inserts (20) adapted to nest inside the lens-holding cups of the lens case, containing enough contact lens treating fluid to fill their respective cups.

Description

F.ASTLY TRANSPORTED CONTACT LENS CARE KIT Field of the Invention -

This invention is in the field of contact lens storage cases.

Background of the Invention

People who use contact lenses, whether of the rigid or soft variety, always

need something handy in which to store them. The reasons van': unexpected overnight stays away from home; travel; activities where there is a need or likelihood

for frequent contact lens removal and replacement. This storage device must hold

fluid to keep the lenses lubricated and must be sealed so as not to allow bacteria to

enter. Without fluid the lenses can become damaged or destroyed.

Quite often, a contact lens wearer will get a foreign object in the eye (e.g., an

eyelash or dirt particle) that causes irritation. In such cases, the contact lens must be

removed from the eye and cleaned, and then re-inserted into the eye or stored in

suitable fluid. Should this type of minor emergency happen when a contact lens case

is not readily available, a frantic search begins for some sort of alternate moist storage

container, such as a cup of water. However, this is not a sanitary solution on either a

short or long term basis. Another known solution for such emergency storage is to

lubricate the lens with saliva after taking it out, and then to re-insert it into the eye.

This is probably the worst solution, as saliva is acidic and damaging to the eye.

While most contact lens storage devices are relatively small and easy

transportable, their necessity is often forgotten until an emergency arises. There is

currently no simple, effective way to ensure that a case will always be available. Some keep extra cases in their glove compartments. Some carry cases in purses or

backpacks . However, despite their efforts, contact lens- wearers still frequently find

themselves without their contact lens cases.

A few portable lens case devices do exist for facilitating storage of the case on one's person. U.S. Patent No. 3,955,726 shows a pendant for storing contact lenses,

hung from a chain around the neck. U.S. Patent No. 3,780,918 discloses a wristwatch

capable of storing contact lenses. U.S. Patent No. 5,002,179 shows a fluid-storing lens case resembling a pen.

Yet even with such known portable lens cases, having a contact lens case

alone is not a complete solution to the aforementioned problem of temporary or emergency lens storage. Most contact lenses require special fluids for cleaning,

disinfecting and storing them. The bottles containing these fluids are much larger

than lens cases, and therefore reduce the portability of any complete lens care kit. To

resolve this, some people are known to keep soaking solution in the lens

compartments of a standard lens case. Unfortunately, the stored fluid tends to leak out

if the top of the case is not closed tightly enough, and ultimately evaporates.

Additionally, if the fluid- filled case leaks, bacteria has the ability to get inside and

contaminate the fluid in which the contact lenses will eventually be stored.

Attempts have been made to solve the fluid storage problem. U.S. Patent No.

5,375,699 shows a contact lens case with a rubber 'O'-ring around the rim of the

storage area to prevent leakage of fluid stored in the lens compartments. U.S. Patent

No. 5,71 1,416 shows a disposable contact lens storage unit with a sealed top to

prevent air or fluid from entering or escaping. Summary of the Invention

The present invention solves the foregoing problems in two complementary

ways. First, a conventional lens case is provided with a quick-detachable key ring or

key chain attachment releasably locked to a specially formed horizontal portion of the

lens case. For example, conventional lens cases generally comprise two cylindrical,

cap-sealed cups located on either end of a relatively flat, horizontal, web portion. In

the present invention, one or more portions of the cup-connecting web is provided with a groove or recess adapted to lockingly receive matingly contoured spring lock

arms of the key ring attachment. In a preferred form the recess for the lock arms is

formed in the edge of the horizontal web. such that the key ring attachment is mated

with the lens case in a horizontal, parallel plane which allows the case to be rested on

a flat surface.

In a further preferred form the key ring attachment device is formed from a

single piece of spring wire, with a closed loop on one end for attachment to a key

chain, and two integral, opposed spring lock arms with a contour and spacing adapted

to snap over and around the portion of the lens case web in a friction fit, preferably

further enhanced by the recessing of the lock arms into the groove in the edge of the web, and even further by knobs or tabs on the end of the lock arm which mate with

detents in the groove. The key ring attachment remains securely locked to the case until its spring

lock arms are forced apart, allowing the case to be quickly and easily separated from

the key chain so that it can be laid flat on a narrow surface such as the edge of a sink.

With the portability and availability of the lens storage case itself solved by the key ring attachment feature above, the fluid storage problem is solved by way of novel fluid-holding cup inserts which fit precisely into the lens cups in the lens case. The

fluid-holding inserts of the present invention comprise in one preferred form

disposable plastic blisters or bubbles of sterile, sealed lens fluid with removable

plastic or foil tops. The inserts drop into the lens cups and are secured with the standard lens cup caps without the need for external sealing structure on the case such

as lens cup O-rings. The fluid inserts are designed to hold just enough fluid to fill

their respective lens cups and still allow a contact lens to be placed in the fluid inside the cup for storage, soaking or cleaning.

In the event that a contact lens needs to be removed from the eye and

temporarily stored or cleaned in the case, the user simply unscrews the cap from a lens

cup, removes the fluid insert, peels back its top, pours the fluid back into the lens cup,

and places the contact lens in the now fluid-filled cup until ready for use.

These and other features of the present invention will be better understood

upon reading the following specification with reference to the drawings.

Brief Description of the Drawings

Figure 1 is an elevated side view of a lens case according to the present

invention, with lens cup caps sectioned for clarity;

Figure 2 is a plan view of the lens case of Figure 1 with the caps removed;

Figure 3 is a bottom plan view of the lens case of Figure 1;

Figure 4 is an end elevational view of a key ring attachment end of the lens

case of Figure 1; Figure 5 is a side perspective view of the lens case of Figure 1. with an

exploded representation of one of the lens cups, a removable fluid insert according to the invention, and the lens cup cap;

Figure 6 is a side perspective view of a fluid insert according to the present invention, illustrating a disposable type with a peelaway cover partly removed;

Figure 6 A illustrates the fluid insert of Figure 6 with an optional disposable

contact lens stored therein;

Figure 7 is a perspective view of a key ring attachment according to the

invention, adapted to removably lock onto the lens case of Figure 1 ;

Figure 8 is an exploded plan view of the lens case of Figure 1 and the key ring attachment device of Figure 7, prior to being assembled;

Figure 9 is a plan view of the lens case and key ring attachment of Figure 8,

assembled;

Figure 10 is a side elevational view of the separated lens case and key ring

attachment of Figure 8 ;

Figure 1 1 is a side elevational view of the mated lens case and key ring

attachment shown in Figure 9;

Figure 12 is a perspective view of an alternate key attachment mechanism for a

lens case according to the present invention;

Figure 13 is a perspective view of a second alternate embodiment of a key

attachment mechanism for lens case according to the present invention; and,

Figure 14 is a third alternate embodiment of a key attachment mechanism for a

lens case according to the present invention. Detailed Description of the Illustrated Embodiments

Referring first to Figures 1 - 4, a preferred example of a lens case 10 according

to the present invention comprises a flat, horizontal web portion 12, and two spaced cylindrical cups 14 adapted to each hold a contact lens, the cups 14 having external

threads 14a for receiving threaded caps 16. Lens case 10 is preferably integrally molded from a suitable plastic material, as is common in the art, although other

known materials and methods of manufacture could be used.

In the illustrated lens case example, web portion 12 is somewhat "8" or "dog

bone" shaped, in that it has rounded, circular ends 12a containing cups 14. and a

curved, narrowed middle region 12b. So far the structure described for lens case 10,

including the shape of web 12, is conventional. It will be understood by those skilled

in the art that other styles of lens case are commercially available, and that the

invention is adaptable to different types of lens cases with only minor modifications.

In accordance with the present invention, at least one of the rounded ends 12a

of web 12 is provided with a peripheral locking groove 12c extending at least partway

into the narrowed middle region 12b of the web. In the illustrated embodiment,

locking groove 12c is recessed into the web and terminates on either side of the web

in detent holes 12d for a purpose described below.

Referring to Figure 2, cups 14 are provided with cruciform slots 18 formed in

the bottom surface of each cup to prevent the contact lenses from sticking to the

bottom surface of a moistened cup by capillary suction. Slots 18 are generally known

in the art.

Referring to Figure 3, in the illustrated embodiment only one end of web 12 is provided with a locking groove 12c, while the opposite end of the web has a reduced

thickness which allows the lower portion 14b of its respective cup 14 to be grasped by

the fingers and pulled for a purpose described below. Of course, it is possible to

construct lens case 10 according to the invention with a locking groove 12c in both ends, but for simplicity of illustration herein, a version of lens case 10 with a single locking groove 12c is shown and described.

Figure 4 clearly shows the recessed nature of locking groove 12c. such that

upper and lower portions of web 12 overhang the groove.

Referring next to Figures 5 and 6, lens case 10 is shown provided with novel

fluid inserts 20 shaped to fit snugly within cups 14 and to be contained therein by caps

16. Fluid inserts 20 preferably comprise disposable plastic bubbles or blisters 20a

containing a small amount of known contact cleaning or storage solution 20e

sufficient to fill one of cups 14 to a desired level. Fluid inserts 20 are sealed, in the

illustrated disposable embodiment by a peelaway cover 20c comprising a known type

of paper, plastic or foil secured in fluidtight and airtight fashion to the upper edge of

plastic blister 20a. Cover 20c in the illustrated embodiment is provided with a

peelaway actuator tab 20d of known type.

Fluid inserts 20 are generally cup- or bowl-shaped to fit in cups 14, and further

preferably have flat bottoms 20b to allow them to stand on a flat, even surface (such

as a sink or countertop) without tipping.

It will be understood that while fluid inserts 20 are illustrated in a preferred

form as being disposable, it is also possible, although less desirable, to use reusable,

resealable fluid-containing inserts of generally the same size and shape and fluid- holding capacity.

In a further alternate embodiment of the invention, fluid inserts 20 contain not

only a specified amount of storage fluid, but also a disposable contact lens of commercially available type. Because fluid inserts 20 are already shaped to conform with the interior dimensions of the lens cups, they are perfectly adapted to carry the

lenses themselves.

Once fluid inserts 20 are inserted in cups 14, and secured therein by caps 16,

they can be transported indefinitely without risk of leakage or evaporation. They also

remain sanitary for the hermetically-sealed shelf life of the lens fluid contained

therein. The rigid lens case and cup construction protects the relatively thin- walled

fluid inserts from being crushed or punctured.

It will be understood by those skilled in the art that the slots 18 in the bottom

surface of cups 14 also help to prevent fluid inserts 20 from sticking to the bottom

surface of the cups by capillary suction or otherwise.

In a further form, fluid inserts 20 are transparent so that the user may readily

ascertain the appearance and condition of the fluid inside without having to open

them.

Referring next to Figures 7 - 11, a preferred form of the key chain attachment

device of the present invention is illustrated at 30, comprising in a preferred form a

single piece of springy, resilient metal wire of known type. Key ring attachment

device 30 generally comprises a closed loop 30a which can be securely attached to a

key ring or key chain; spaced spring arms 30b with a somewhat U- or horseshoe-

shape, and spring arm detent ends 30c. Ends 30c of spring arms 30b are spaced in their relaxed position by a distance slightly less than the side to side width of the rounded end 12a of lens case 10, and are adapted to horizontally slide into locking groove 12c in web 12.

While the illustrated example of attachment device 30 is of a preferred construction, size and shape, it will be understood that the device as a whole or

various portions such as the closed loop 30a can vary in these parameters.

Referring to Figure 8, the plane of the fork-like spring arms of the attachment

device 30 is aligned with the plane of web 12 and then the arms are forced over

rounded end 12a into locking groove 12c in a resilient spring fit wherein they are first

slightly forced apart at the widest diameter portion of rounded end 12a, and then draw

back together as they proceed toward detent holes 12d in the ends of locking groove

12c located at the narrower middle region 12b of web 12. The resilient spring strength

of locking arms 30b is preferably sufficient to create a strong friction fit with rounded

end 12a of the lens case, such that a conscious effort is required to separate them.

However, the locking connection between attachment device 30 and web 12 can be

further enhanced by detents 30c on the ends of spring arms 30b, which snap into

detent holes 12d in the ends of locking groove 12c. Depending on the depth of the

detents and the strength of the spring arms, the attachment device can be configured to

pull apart with sufficient force, or can be configured to first require spring arms 30a to

be spread apart, for example by a squeezing or prying force, before they can be

separated from the lens case.

It will be apparent to those skilled in the art, and to contact lens wearers, that

lens case 12 using the inventive key chain attachment device 30 according to the invention can quickly and easily be detached from the key chain so that it can be

rested on a narrow, flat surface such as the edge of a sink or bathroom counter. In this

manner there is no need to fumble with a case attached to a set of keys while removing the fluid inserts or inserting contact lenses. Where counterspace is sufficient, the planar nature of attachment device 30 and its alignment with web 12

may allow case 10 to rest in level fashion on a flat surface, even with a key chain

attached.

Referring to Figures 12 - 14, three alternate embodiments of the key chain

attachment mechanism are illustrated using attachment structure which is known in

the art. Figure 12 illustrates an alternate lens case 12 with a resilient finger buckle

mechanism of a generally known type, for example a Fastex® brand fastener,

incorporated or connected to the lens case and then in turn connected to a key chain or

key ring. In the illustrated embodiment of Figure 12, the male portion of the resilient

finger connector is made from plastic, and is either integrally formed with the lens

case or secured thereto. The female portion of the connector is attached to a key ring.

Referring to Figure 13, a second alternate key chain attachment mechanism is

illustrated as a simple, bead-type key chain which is well known in the art, secured to

one end of the lens case- 12 by an eyelet through which the chain is threaded and then

closed. A standard key ring is shown attached to the bead-type chain, and can be

released therefrom in known manner. Referring to Figure 14, a third alternate

attachment mechanism of known type is illustrated, comprising a known type of

generally D-shaped hook with a spring-loaded, thumb-operated plunger which can be

temporarily depressed to place a key, key ring or key chain into the hook portion, and which then locks closed when released. Again, this key chain attachment device can be integrally formed with the lens case, for example being made from plastic or metal, or can be secured to the lens case in either permanent or removable fashion.

It will be understood by those skilled in the art that the foregoing illustrated

embodiments of my invention are described and illustrated in a preferred form for

purposes of explanation, and are not intended to be limiting examples, as the fluid inserts and key ring attachment structure are susceptible of modification without

departing from the scope of my invention as described in the following claims.

Accordingly. I claim:

Claims

1. A device adapted to store contact lens fluid in a^' cup of a contact lens case,

comprising: a removable, self-contained, sealed fluid insert shaped to fit inside a cup and to hold enough contact lens fluid to fill the cup to a desired level when the insert is

removed from the cup.

2. The device of claim 1, wherein the fluid insert is generally cup-shaped.

3. The device of claim 1, wherein the fluid insert is disposable.

4. The device of claim 3, wherein the fluid insert comprises a plastic bubble or

blister sealed by a peelaway film of suitable material such a paper, plastic or foil.

5. The device of claim 4, wherein the blister portion of the fluid insert is transparent.

6. The device of claim 4, wherein the peelaway cover includes an actuating tab

on its exterior surface.

7. The device of claim 1 , wherein the fluid insert is sized to fit within a cup and

to be secured therein by the cup cap.

8. A contact lens case, comprising: two contact lens cups for storing or transporting a contact lens piece; a lens case body joining the two cups; and

key chain adapter means on the lens case body for securing the lens case to a

key chain or key ring.

9. The apparatus of claim 8. wherein the key chain adapter means comprises a

closed ring portion, a pair of resilient spring arms connected to and in planar

alignment with the closed loop portion, the spring arms being adapted to resiliently

engage a portion of the lens case in a releasable friction fit.

10. The apparatus of claim 8. further including a lens case having a portion thereof adapted to engage the spring arms.

11. The apparatus of claim 9. wherein the lens case comprises a horizontal web

portion having a groove formed in an edge face thereof, the groove being adapted to

receive the spring arms.

12. The apparatus of claim 10, wherein the groove terminates in a pair of detent

holes, and the spring arms terminate in a pair of detents adapted to lockingly fit into

the detent holes.

13. The apparatus of claim 8, wherein the closed loop portion and the spring arms are formed from a single piece of resilient material.