A valve seat portion 20 has a nearly tubular shape, at the bottom of which a circular opening portion 23 which functions as a valve seat is formed. A valve portion 10 has a ring-shaped supporting portion 11 which is disposed inside the valve seat portion 20. A valve body 12 has a shape corresponding
A valve seat portion 20 has a nearly tubular shape, at the bottom of which a circular opening portion 23 which functions as a valve seat is formed. A valve portion 10 has a ring-shaped supporting portion 11 which is disposed inside the valve seat portion 20. A valve body 12 has a shape corresponding to the circular opening portion 23, and multiple coupling portions couple the supporting portion 11 and the valve body 12. In the valve portion 10, the valve body can move between a closed position in which the valve body closes the opening portion 23 in the valve seat portion 20 and an open position in which the valve body opens the opening portion 23 by the flexibility of the four coupling portions 13.
대표청구항▼
What is claimed is: 1. A valve mechanism adapted for a mouth portion of a tube-type fluid container, comprising: a valve seat portion being cup-shaped having an opening at its bottom through which a fluid passes, said valve seat portion having an inner wall; and a resinous valve portion comprising:
What is claimed is: 1. A valve mechanism adapted for a mouth portion of a tube-type fluid container, comprising: a valve seat portion being cup-shaped having an opening at its bottom through which a fluid passes, said valve seat portion having an inner wall; and a resinous valve portion comprising: (i) a valve body having a shape corresponding to said opening; (ii) an annular support fixedly attached to the inner wall of the valve seat portion; and (iii) multiple connectors connecting the valve body and the support, wherein said connectors has isolated flection points elastically urging the valve body downward to close the opening and are outwardly bendable as the valve body moves upward, wherein when the valve body is moved upward to open the opening, the connectors move outward toward the inner wall. 2. The valve mechanism as claimed in claim 1, wherein the connectors comprise at least three coupling portions. 3. The valve mechanism as claimed in claim 1, wherein the isolated flection points of the connectors are in contact with the inner wall when moving outward. 4. The valve mechanism as claimed in claim 1, further comprising a guide mechanism which guides an upward and downward movement of the valve body. 5. The valve mechanism as claimed in claim 1, wherein each of the valve seat portion and the valve portion is formed with a single integrated piece made of a resin. 6. The valve mechanism as claimed in claim 1, wherein the valve seat portion is comprised of a cylindrical support having an upper opening and a lower opening, through which a fluid passes; and a valve seat having an opening at its bottom through which the fluid passes, said valve seat being fitted in inside the lower opening of the cylindrical support. 7. The valve mechanism as claimed in claim 1, wherein each of the valve seat portion and the valve portion is formed with a single integrated piece made of a resin. 8. A tube-type fluid container comprising a container body for storing a fluid having a mouth portion, and the valve mechanism of claim 1 attached to the mouth portion. 9. The container as claimed in claim 8, wherein the container body is a double wall container body comprised of an inner container for storing a fluid and an outer container, said inner container being flexible and compressible, said outer container having at least one through-hole for keeping an interior space between the inner container and the outer container at ambient pressure. 10. The container as claimed in claim 9, wherein the through-hole has a size which can let a small amount of air through. 11. The container as claimed in claim 9, wherein the through-hole is formed in a portion to which a pressure is applied when the fluid is discharged. 12. The container as claimed in claim 9, wherein the inner container and the outer container are integrated at the mouth portion, and welded at their bottoms. 13. The valve mechanism according to claim 1, wherein the connectors having the isolated flection points are N-shaped. 14. A valve mechanism adapted for a mouth portion of a tube-type fluid container, comprising: a valve seat portion being cup-shaped having an opening at its bottom through which a fluid passes, said valve seat portion having an inner wall; a resinous valve portion comprising: (i) a valve body having a shape corresponding to said opening; (ii) an annular support fixedly attached to the inner wall of the valve seat portion; and (iii) multiple connectors connecting the valve body and the support, said connectors elastically urging the valve body downward to close the opening and being outwardly bendable as the valve body moves upward, wherein when the valve body is moved upward to open the opening, the connectors move outward toward the inner wall; and a guide mechanism which guides an upward and downward movement of the valve body, wherein the guide mechanism comprises (a) a vertical guide pin provided in said valve body downstream thereof and (b) a hole portion having a hole wherein the guide pin is inserted, said hole portion being attached to an inner wall of the valve seat portion. 15. The valve mechanism as claimed in claim 14, wherein the coupling portions have flections. 16. A valve mechanism adapted for a mouth portion of a tube-type fluid container, comprising: a valve seat portion being cup-shaped having an opening at its bottom through which a fluid passes, said valve seat portion having an inner wall; a resinous valve portion comprising: (i) a valve body having a shape corresponding to said opening; (ii) an annular support fixedly attached to the inner wall of the valve seat portion; and (iii) multiple connectors connecting the valve body and the support, said connectors elastically urging the valve body downward to close the opening and being outwardly bendable as the valve body moves upward, wherein when the valve body is moved upward to open the opening, the connectors move outward toward the inner wall; and a guide mechanism which guides an upward and downward movement of the valve body, wherein the guide mechanism comprises (a) a guide plate having an outer diameter smaller than an inner diameter of the annular support and being slidable against an inner wall of the annular support, and (b) a rod connecting the guide plate and the valve body. 17. A valve mechanism adapted for a mouth portion of a tube-type fluid container, comprising: a valve seat portion being cup-shaped having an opening at its bottom through which a fluid passes, said valve seat portion having an inner wall; a resinous valve portion comprising: (i) a valve body having a shape corresponding to said opening; (ii) an annular support fixedly attached to the inner wall of the valve seat portion; and (iii) multiple connectors connecting the valve body and the support, said connectors elastically urging the valve body downward to close the opening and being bendable as the valve body moves upward; and a guide mechanism which guides an upward and downward movement of the valve body and restricts a sideways movement of the valve body, said guide mechanism being provided downstream of the valve body, wherein said guide mechanism is not subject to deformation. 18. The valve mechanism as claimed in claim 17, wherein said connectors comprise at least three coupling portions. 19. The valve mechanism as claimed in claim 17, wherein said coupling portions have flections. 20. The valve mechanism as claimed in claim 17, wherein the valve seat portion is comprised of a cylindrical support having an upper opening and a lower opening, through which a fluid passes; and a valve seat having an opening at its bottom through which the fluid passes, said valve seat being fitted in inside the lower opening of the cylindrical support. 21. A tube-type fluid container comprising a container body for storing a fluid having a mouth portion, and the valve mechanism of claim 17 attached to the mouth portion. 22. The container as claimed in claim 21, wherein the container body is a double wall container body comprised of an inner container for storing a fluid and an outer container, said inner container being flexible and compressible, said outer container having at least one through-hole for keeping an interior space between the inner container and the outer container at ambient pressure. 23. The container as claimed in claim 22, wherein the through-hole has a size which can let a small amount of air through. 24. The container as claimed in claim 22, wherein the through-hole is formed in a portion to which a pressure is applied when the fluid is discharged. 25. The container as claimed in claim 22, wherein the inner container and the outer container are integrated at the mouth portion, and welded at their bottoms. 26. A valve mechanism adapted for a mouth portion of a tube-type fluid container, comprising: a valve seat portion being cup-shaped having an opening at its bottom through which a fluid passes, said valve seat portion having an inner wall; a resinous valve portion comprising: (i) a valve body having a shape corresponding to said opening; (ii) an annular support fixedly attached to the inner wall of the valve seat portion; and (iii) multiple connectors connecting the valve body and the support, said connectors elastically urging the valve body downward to close the opening and being bendable as the valve body moves upward; and a guide mechanism which guides an upward and downward movement of the valve body and restricts a sideways movement of the valve body, said guide mechanism being provided downstream of the valve body, wherein said guide mechanism comprises (a) a vertical guide pin provided in said valve body and (b) a hole portion having a hole wherein the guide pin is inserted, said hole portion being attached to an inner wall of the valve seat portion. 27. A valve mechanism adapted for a mouth portion of a tube-type fluid container, comprising: a valve seat portion being cup-shaped having an opening at its bottom through which a fluid passes, said valve seat portion having an inner wall; a resinous valve portion comprising: (i) a valve body having a shape corresponding to said opening; (ii) an annular support fixedly attached to the inner wall of the valve seat portion; and (iii) multiple connectors connecting the valve body and the support, said connectors elastically urging the valve body downward to close the opening and being bendable as the valve body moves upward; and a guide mechanism which guides an upward and downward movement of the valve body and restricts a sideways movement of the valve body, wherein said guide mechanism comprises (a) a guide plate having an outer diameter smaller than an inner diameter of the annular support and being slidable against an inner wall of the annular support, and (b) a rod connecting the guide plate and the valve body.
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