body of a water bag or a balloon toy, may be bound at FIG. 1 is a perspective view of check valve in accor
its projecting portion after the main body has been filled 10 dance with one embodiment of the present invention,
with a fluid through the tube, thereby to prevent the FIG. 2 is an enlarged section view taken along the
fluid from leaking from the main body. In another way line II—II of FIG. 1.
a check valve is mounted on a passage port of the main FIG. 3 is an exploded perspective view of the check
body. The sealing of the check valve prevents a fluid valve of FIG. 1.
filled in the main body from leaking therefrom. 15 FIG. 4 is a front view illustrating one example of how
The former means not only requires a troublesome tne check valve of FIG 1 is used
tube binding operaton, but also presents the defect that FIG 5 is an eniarged view with portions broken
a portion of the fluid filled m the main body easily leaks of thg main portions in pjG. 4.
during the tube binding operat.on. The latter means mG 6 fc a view ainstrati how the check va,ve
presents the defects that the valve itself has a very com- 20 & ^ operation.
plicated structure and requires special structural mem- _ ,., J ,D, ... ^ ^. ,
u j uiur*. i. *r.t. 1 u FIG. 7 (A) and (B) are views illustrating how the
bers and much labor for attachment of the valve, result- . , , , As ■ , ^ • •
ing in expensive costs. Moreover, such valve may easily c*ec\va[ve ^V'( !* ?■ e"larf d/ectl0n v'ew °f
be damaged during the use, thereby to lower or lose the the, ^eck valvf thr°uSh whlch a ^ * introduced,
sealing function as a check valve. 25 and (B) is an enlarged section view of the check valve in
a closed position.
SUMMARY OF THE INVENTION FIG. 8 is a perspective view of check valve in accor
The present invention relates to a check valve, and dance with a second embodiment of the present inven
more particularly to improvements in a check valve to tion.
be used for an article such as a balloon toy or a water 30 FIG. 9 is an exploded perspective view of the check
bag which is filled air-tight with a fluid such as air or a valve in FIG. 8.
liquid. FIG. 10 is a front view illustrating one example of
It is a main object of the present invention to provide how the check valve of FIG. 8 is used,
an economical check valve having a very simple struc- FIG. 11 is a view illustrating how the check valve
ture capable of securely preventing a leak of a fluid 35 effects a closing operation,
filled in a balloon toy or a water bag and assuring a _._..„ c_ nccrotDTinw ra TUC
smooth charge/discharge of a fluid, so that the check Dfcl AlLfclJ JJEbCKIF 1 ION Ut lHb
valve of the present invention is less troubled and can INVENTION
easily be manufactured. The check valve V in accordance with the present
The check valve in accordance with the present in- 40 invention comprises a fluid pipe 1 of predetermined
vention comprises a suitable number of valve bodies width and length formed into a flat shape and made of
disposed in a fluid pipe of a flat shape made of a plastic a soft and thin plastic film such as a polyethylene film,
film, each of the valve bodies made of a flat plastic film and a valve body 2 disposed in the fluid pipe along the
pouch having a closed portion and an open portion fluid flowing direction from tne base end side of the
formed respectively at its tip and base sides in the fluid 45 fjujd pjpe j
flowing direction a fluid adapted to be charged or The valve bod 2 has a dosed tion 3 ^ an
discharged through gaps between the inner surfaces of Jon 4 ectivd at the ti and the base sides of the
the fluid pipe and the outer surfaces of the valve bodies. fluid > j in ^ fluid flowi direction. xhe valve
I he check valve in accordance with the present m- , , - • , r n * 1 n 1. r i_
, , . , . v , ,„ body 2 is made of a flat plastic film pouch of which
vention may be used for a balloon toy, for example. 50 ^ . ,. ^ fi, „ ■, ■ , ~
\\7u n • j • 1. j • 4.1. n -j ■ • J- 5 matenal is the same as that of the fluid pipe 1. Gaps 5 are
When a fluid is charged in the fluid pipe m a direction - ,, ^ A, . . , *y\, a -j •
1 Uj I A 1 i_j formed between the inner surfaces la of the fluid pipe 1
from the valve body closed portions to the valve body . , , . . , , „ / i; .,
open portions, the fluid smoothly flows in the pipe and *e outer surfaces^ ^ vaIve body 1 A fluld
through the gaps between the inner surfaces of the fluid may flow In and ^ throu8h ^ese SaPs 5' r a . J
pipe and the outer surfaces of the valve bodies, and 55 , In °^der furthfr assu,re the Prevention of a fluid
enters the inside of the balloon toy. Since the valve leak> the check valve V has a bondm8 Portlon 6 at
bodies are closed at the tips thereof which form dead whlch the mner surfaces la °f *e pipe 1 are bonded to
ends, the fluid filled in the balloon toy which tends to the outer surfaces 2a of the valve body 2. The check
flow out due to its pressure, expands the valve bodies by valve v also has a 8ulde tongue 7 for fluid charge/dis
the pressure of the fluid. The gaps are therefore closed 60 charge means disposed at the fluid inlet/outlet port
to prevent the fluid from flowing out from the balloon edge of the fluid pipe 1. This guide tongue 7 is disposed
toy. for facilitating the charge/discharge of a fluid.
The fluid filled in the balloon toy may smoothly be FIG. 3 is an exploded view of the check valve V,
discharged by opening the closed gaps with a slender from which it can easily be understood how the check
rod inserted therein from the closed sides thereof. 65 valve V is made by way of example.
In accordance with the check valve of the present In this example, in order to facilitate the manufacture
invention, its peculiar structure together with the resil- of the check valve having the structure above-men
iency of a thin material used may provide a secure non- tioned, the fluid pipe 1 is made of two. plastic films Fl