JP2005304572A - Airtight container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airtight container capable of reducing noise caused when a lid body is closed or opened, or an annular sealing projection rubs against an annular sealing groove or momentarily separates from a rubbing state. <P>SOLUTION: The airtight container is provided with a sealing mechanism 17 in which an upper sealing surface 11 and a lower sealing surface 12 are formed by shifting positions in the height direction of a container body 3 on the inward peripheral wall surface 9 and outward peripheral wall surface 10 of the annular sealing groove integrally formed on the container body 3 respectively, an upper sealing part 15 and a lower sealing part 16 are formed at the upper part 13 and lower part 14 of the annular sealing projection integrally formed on the lid body 6 respectively, the upper part of the annular sealing projection is formed into high rigidity in order to bring the upper sealing part into slidable contact with the upper sealing surface, and the lower part of the annular sealing projection is formed into low rigidity so as to be flexibly deformed. The container body and the lid body are formed of different kinds of synthetic resin materials from each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is directed to a specific seal structure in which an annular seal groove and an annular seal protrusion are rubbed against each other so as to be partially slidably contacted and partially pressed to exhibit a tight sealing property. It is related with the airtight container which can reduce the noise which generate | occur | produces when it closes and opens and an annular seal protrusion rubs against an annular seal groove | channel, and it remove | leaves from the rubbing state instantaneously.

  Usually, among various containers such as a cosmetic container molded from a synthetic resin material, a remarkably airtight performance may be required because the stored items are volatile. For example, Patent Document 1 is known as a structure for ensuring airtightness in this type of container.

  In Patent Document 1, an annular seal protrusion integrally formed on the other is inserted into an annular seal groove integrally formed on either one of a synthetic resin container main body and a synthetic resin lid that opens and closes the container body, In an airtight container that hermetically seals the inside of the container body, an upper sealing surface is formed on one of an inward circumferential wall surface and an outer circumferential wall surface that face each other at an interval in the annular seal groove, and on the other side A lower seal surface is formed by shifting the position in the height direction of the container body, and an upper seal is formed on the upper and lower portions of the annular seal protrusion along the height direction of the container body so as to correspond to the upper seal surface and the lower seal surface, respectively. In order to form the upper seal portion and the lower seal portion so that the upper seal portion is in sliding contact with the upper seal surface, the upper portion of the annular seal protrusion is formed with high rigidity, and the lower seal portion is To resiliently pressed against the surface, it was equipped with a sealing mechanism which is formed in the low rigidity allow the flexible deformation of the lower portion of the annular seal projection.

Then, the upper seal portion is in a state of being in strong sliding contact with the upper seal surface with its high rigidity, and the lower seal portion is in a state of being elastically pressed against the lower seal surface. While ensuring smooth opening and closing operability of the body, it was possible to ensure high hermetic sealing performance.
JP 2002-306234 A

  By the way, in the above prior art, an extremely tight airtight sealing performance is ensured by the sealing surface of the annular seal groove and the sealing portion of the annular seal protrusion formed integrally with the synthetic resin container body and the lid. However, in order to obtain this tight sealability, in the specific seal structure in which they are slidably contacted with each other so as to rub against each other and partially pressed together, the lid is closed or opened, and the annular seal protrusion is formed. There has been a problem that abnormal noise is generated when the annular seal groove rubs against the annular seal groove or instantaneously leaves the rubbed state.

  The present invention has been devised in view of the above-described conventional problems, and the annular seal groove and the annular seal projection are rubbed against each other so that they are partially slidably contacted and partially pressed together to form a tight seal. This is a special seal structure that demonstrates the characteristics of the seal, and when the lid is closed or opened, the annular seal protrusion rubs against the annular seal groove, or the difference that occurs when the rubbed state is momentarily removed. An object of the present invention is to provide an airtight container capable of reducing sound.

  An airtight container according to the present invention has an annular seal groove formed integrally in one of a container body formed of a synthetic resin material and a lid body formed of a synthetic resin material that opens and closes the container body, and an annular seal protrusion is formed on the other. An upper sealing surface is formed on one of the inwardly facing circumferential wall surface and the outwardly facing circumferential wall surface of the annular seal groove that are spaced apart from each other, and the position is shifted in the height direction of the container body on the other side. Forming a lower seal surface, and forming an upper seal portion and a lower seal portion corresponding to the upper seal surface and the lower seal surface on the upper and lower portions of the annular seal protrusion along the height direction of the container body, respectively. In order to make the upper seal portion slide in contact with the upper seal surface, the upper portion of the annular seal protrusion is formed with high rigidity, and the lower seal portion is elastically pressed against the lower seal surface. Therefore, the lower part of the annular seal protrusion is formed in a low rigidity so as to be flexibly deformable, and the annular seal protrusion is inserted into the annular seal groove to hermetically seal the inside of the container body. In the above airtight container, the container body and the lid are formed of different kinds of synthetic resin materials.

  In addition, instead of forming the container body and the lid body from different types of synthetic resin materials, they are formed of synthetic resin materials of the same kind and different hardnesses.

  In addition, a gap that allows deformation of the upper portion of the annular seal protrusion is formed between one of the inward peripheral wall surface and the outward peripheral wall surface having the lower seal surface and the upper portion of the annular seal protrusion. It is characterized by that.

  In the hermetic container according to the present invention, the annular seal groove and the annular seal protrusion are rubbed against each other so that they are partially slidably contacted and partially pressed to exhibit a tight seal. For the structure, it is possible to reduce the noise generated when the lid seal is closed or opened and the annular seal protrusion rubs against the annular seal groove, or when the lid is momentarily detached from the rubbed state. .

  Hereinafter, an embodiment of an airtight container according to the present invention will be described in detail with reference to the accompanying drawings. 1 to 3 show a portable cosmetic container 1 containing a volatile cosmetic C as an example of an airtight container. As shown in the figure, the cosmetic container 1 includes a synthetic resin container main body 3 in which a storage portion 2 for storing a volatile cosmetic C is formed, and a hinge 4 connected to one end of the container main body 3. A synthetic resin lid that is movably connected, opens and closes the container body 3, and is detachably engaged with the other end of the container body 3 via the hook means 5 to keep the container body 3 closed. It is mainly composed of the body 6.

  The cosmetic container 1 according to the present embodiment basically has an annular seal groove 7 integrally formed in one of the container body 3 and the lid body 6 and is formed in either one of the container body 3 and the lid body 6. The annular seal protrusion 8 is integrally formed, and the storage portion 2 is hermetically sealed by inserting the annular seal protrusion 8 into the annular seal groove 7. In particular, the annular seal grooves 7 are spaced apart from each other. The upper seal surface 11 is formed on one of the inward peripheral wall surface 9 and the outward peripheral wall surface 10 facing each other, and the lower seal surface 12 is formed on the other side by shifting the position in the height direction of the container body 3. An upper seal portion 15 and a lower seal portion 16 are formed on the upper portion 13 and the lower portion 14 of the seal projection 8 along the height direction of the container body 3 so as to correspond to the upper seal surface 11 and the lower seal surface 12, respectively. In order to make the upper seal portion 15 slidably contact the upper seal surface 11, the upper portion 13 of the annular seal protrusion 8 is formed with high rigidity, and the lower seal portion 16 is elastically pressed against the lower seal surface 12. In addition, a lower part 14 of the annular seal projection 8 is provided with a seal mechanism 17 formed to be flexible and deformable with low rigidity.

  Further, deformation of the upper portion 13 of the annular seal protrusion 8 is allowed between one of the inward peripheral wall surface 9 and the outward peripheral wall surface 10 having the lower seal surface 12 and the upper portion 13 of the annular seal protrusion 8. A gap 18 is formed.

  If it demonstrates according to illustration, the annular seal groove 7 is integrally formed in the container main body 3 along the circumferential direction in the surrounding side wall 19 surrounding the accommodating part 2. As shown in FIG. The annular seal groove 7 has two peripheral wall surfaces 9 and 10 formed by recessing the peripheral side wall 19 with a considerable depth in the height direction of the container body 3, and the two peripheral wall surfaces 9 and 10 are formed. Are arranged in the radial direction of the container body 3 so as to face each other with a space therebetween. Of these peripheral wall surfaces 9 and 10, the peripheral wall surface located on the radially outer side of the container main body 3 becomes the inward peripheral wall surface 9 facing the storage portion 2 side, and conversely the peripheral wall surface positioned on the storage portion 2 side is the container main body 3 It becomes the outward surrounding wall surface 10 which faces an outer side.

  On the other hand, the lid 6 has an annular seal projection 8 that is inserted into the annular seal groove 7 when the container body 3 is closed by the lid 6, so that the storage portion 2 extends along the circumferential direction of the lid 6. It is integrally formed so as to surround it. The annular seal protrusion 8 has two peripheral surfaces formed by being suspended at a considerable height on the container body 3 side, and when inserted into the annular seal groove 7, these two peripheral surfaces Among these, the outer peripheral surface facing the outside of the container body 3 faces the inward peripheral wall surface 9, and the inner peripheral surface facing the storage portion 2 side faces the outward peripheral wall surface 10. As shown in FIG. 3, when the annular seal protrusion 8 is inserted into the annular seal groove 7, the upper portion 13 and the lower portion 14 along the height direction of the container body 3 are separately provided in the annular seal groove 7. The seal mechanism 17 is configured in contact with the facing circumferential wall surface 9 and the outward circumferential wall surface 10.

  The relationship between the annular seal groove 7 and the annular seal protrusion 8 will be described in detail. The upper inner peripheral surface of the annular seal protrusion 8 is brought into contact with the outward peripheral wall surface 10 of the annular seal groove 7 to form the upper seal portion 15. The upper part of the outward peripheral wall surface corresponding to the seal portion 15 becomes the upper seal surface 11. The lower outer peripheral surface of the annular seal protrusion 8 is brought into contact with the inward peripheral wall surface 9 of the annular seal groove 7 to form the lower seal portion 16, and the inward peripheral wall surface lower portion corresponding to the lower seal portion 16 is the lower seal surface 12. It becomes. The contact areas where the seal portions 15 and 16 and the seal surfaces 11 and 12 are in contact may partially overlap, but are set to be shifted at least in the height direction of the container body 3.

  In particular, the lower portion 14 of the annular seal protrusion 8 on which the lower seal portion 16 is formed is formed with low rigidity so as to be flexibly deformable in order to elastically press the lower seal portion 16 against the lower seal surface 12. . In the illustrated example, the thickness of the lower portion 14 of the annular seal protrusion 8 is set thin so that the lower portion 14 is softened, whereby the lower seal portion 16 is familiar with the lower seal surface 12 and has a considerable elasticity. It comes in contact with force and seals hermetically.

  The upper portion 13 of the annular seal protrusion 8 where the upper seal portion 15 is located is formed with higher rigidity than the lower portion 14 so that the upper seal portion 15 is brought into sliding contact with the upper seal surface 11. In the illustrated example, the thickness of the upper portion 13 of the annular seal protrusion 8 is set thick so that the upper portion 13 is hardened. Thus, when the annular seal protrusion 8 is inserted into and removed from the annular seal groove 7, The upper seal portion 15 moves while sliding on the surface 11, and after the insertion is completed, the upper seal portion 15 is brought into contact with a considerably strong pressing force so as to be hermetically sealed.

  Further, between the inward peripheral wall surface 9 having the lower seal surface 12 and the upper portion 13 of the annular seal projection 8 on the side opposite to the side where the upper seal portion 15 and the upper seal surface 11 are in contact, the annular seal projection 8 is provided. A gap 18 that allows deformation of the upper portion 13 is formed. In the illustrated example, the gap 18 is formed by retreating the inward peripheral wall surface 9 above the lower seal surface 12 outward in the radial direction of the container body 3, and the upper seal portion 15 is sealed upward by the gap 18. Even if the annular seal projection 8 is deformed so as to swell strongly against the surface 11, the deformation is absorbed without hindering the deformation. Further, the annular seal protrusion 8 is inserted into and extracted from the upper opening edge of the annular seal groove 7 and the lower edge portion of the gap 18 and the lower end edge of the annular seal protrusion 8 and the peripheral edge of the thickness change portion. A tapered surface 20 for guiding is formed.

  And especially in this embodiment, the container main body 3 and the cover body 6 provided with such a sealing mechanism 17 are formed of different kinds of synthetic resin materials. For example, the container body 3 is made of high-density polyethylene, while the lid body 6 is made of polypropylene. In general, high density polyethylene has a Rockwell hardness of 40 to 70, and polypropylene has a hardness of 70 to 110. Therefore, when the material is selected in this way, the lid body 6 and the annular seal protrusion 8 are formed in the container body 3 and The hardness is relatively high with respect to the annular seal groove 7.

  In such a cosmetic container 1, when the container body 3 is closed with the lid 6, first, the lower part 14 of the annular seal protrusion 8 is smoothly inserted into the annular seal groove 7 without any particular feeling of resistance, and then the annular seal. The upper portion 13 of the protrusion 8 is inserted into the annular seal groove 7. In the process in which the upper portion 13 of the annular seal protrusion 8 enters the annular seal groove 7, the upper seal surface 11 and the upper seal portion 15 start to slidably contact with each other at the upper portion of the annular seal groove 7. At the same time, the lower seal surface 12 and the lower seal portion 16 come into contact with each other at the lower portion of the annular seal groove 7. Thereafter, when the lid body 6 is strongly closed, the lower seal portion 16 is inserted deeper while being flexibly deformed while conforming to the lower seal surface 12, and the upper seal portion 15 is further slid strongly against the upper seal surface 11. Deeply inserted.

  At this time, the container body 3 integrally formed with the annular seal groove 7 and the lid body 6 integrally formed with the annular seal protrusion 8 are respectively formed of different synthetic resin materials, specifically, high-density polyethylene and polypropylene having different hardnesses. As a result, the noise generated when the annular seal protrusion 8 rubs against the annular seal groove 7 can be reduced.

  When the lid 6 is completely closed and the container body 3 is closed by the hook means 5, the upper seal portion 15 is in a state of being in strong sliding contact with the upper seal surface 11 with its high rigidity, and the lower seal portion 16 Is in a state of being elastically pressed against the lower seal surface 12 and can exhibit high airtight performance by these two upper and lower seal portions, and can also reduce noise generated at this time. The upper portion 13 of the annular seal protrusion 8 is bulged and deformed by the strong sliding contact between the upper seal portion 15 and the upper seal surface 11, and the bulging deformation is allowed by the gap 18, so that the lower portion of the annular seal protrusion 8 is 14, the lower seal portion 16 is more strongly pressed toward the lower seal surface 12, thereby increasing the pressure contact between the lower seal portion 16 and the lower seal surface 12, and the upper portion 13 and the lower portion 14 of the annular seal protrusion 8. Both can exhibit extremely high hermetic sealing performance.

  On the other hand, when the container body 3 is opened, if the hook means 5 is removed, the upper seal portion 15 and the upper seal surface 11 that are in a strong sliding contact state, and the lower seal portion 16 and the lower seal surface that are in an elastic pressure contact state 12, the contact state between the two is loosened, and the annular seal protrusion 8 can be smoothly extracted from the annular seal groove 7 by rotating the lid 6 thereafter. By this operation, it is possible to reduce the noise generated when the annular seal projection 8 rubs against the annular seal groove 7 and when the annular seal protrusion 8 momentarily leaves the rubbed state.

  In the above embodiment, the case where the lid body 6 is made of polypropylene and the container body 3 is made of high-density polyethylene has been described as an example. Further, instead of forming the container body 3 and the lid body 6 from different kinds of synthetic resin materials, they may be formed of synthetic resin materials of the same type and different hardness. For example, both the container body 3 and the lid body 6 are made of polypropylene, and at that time, those having a Rockwell hardness of 70 and those of 110 may be properly used.

  FIG. 4 shows a modification of the above embodiment with respect to the seal mechanism 17. This modification is the same as the above embodiment except that the positional relationship between the seal portion and the seal surface is opposite to the radial direction of the container body 3. That is, the upper seal portion 15 is formed on the upper outer peripheral surface of the annular seal protrusion 8, the upper seal surface 11 is formed on the upper portion of the inward peripheral wall surface 9, and the lower seal portion 16 is formed on the lower inner peripheral surface of the annular seal protrusion 8. In addition, a lower seal surface 12 is formed at the lower portion of the outer circumferential wall surface 10. Between the outer peripheral wall surface 10 and the upper portion 13 of the annular seal protrusion 8, the upper peripheral portion 10 of the annular seal protrusion 8 is retracted radially inward of the container body 3 above the lower seal surface 12. A gap 18 is formed to allow the deformation. Even in such a modification, it is a matter of course that the same operational effects as the above-described embodiment can be obtained.

  In the above embodiment, when setting the rigidity required for the upper part 13 and the lower part 14 of the annular seal projection 8, the wall thickness and thus the side sectional area are changed. The upper portion 13 and the lower portion 14 may be formed by synthetic resin materials having different rigidity, or by forming a fine groove that gives the lower portion 14 considerable flexibility. Stiffness can be set. Further, in the illustrated example, the case where the inward peripheral wall surface 9 and the outward peripheral wall surface 10 are formed substantially perpendicularly along the height direction of the container main body 3 has been shown. 7 may be narrowed in the depth direction, and may be formed to be inclined to some extent so that the distance between the inward peripheral wall surface 9 and the outward peripheral wall surface 10 is closer to the lower part than the upper part.

  In the above embodiment, in order to secure the gap 18, the inward peripheral wall surface 9 and the outward peripheral wall surface 10 are retracted in the radial direction of the container body 3. If a sufficient thickness can be secured, the gap 18 may be formed by reducing the thickness without retreating the inward peripheral wall surface 9 or the like. Further, in the above embodiment, the case where the annular seal groove 7 is integrally formed on the container body 3 and the annular seal protrusion 8 is integrally formed on the lid body 6 has been described as an example. The groove 7 may be integrally formed, and the annular seal protrusion 8 may be formed on the container body 3. Furthermore, in the said embodiment, although demonstrated the lid body 6 attached to the container main body 3 via the hinge 4, the lid body 6 isolate | separated completely from the container main body 3 may be sufficient. Of course.

It is a partially broken perspective view of a cosmetic container showing a preferred embodiment of an airtight container according to the present invention. It is a sectional side view of the cosmetic container of FIG. It is a principal part expanded side sectional view of the cosmetics container of FIG. It is a principal part expanded side sectional view which shows the modification of the airtight container concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Container body 6 Lid body 7 Annular seal groove 8 Annular seal protrusion 9 Inward peripheral wall surface 10 Outward peripheral wall surface 11 Upper seal surface 12 Lower seal surface 13 Upper part of seal protrusion 14 Lower part of seal protrusion 15 Upper seal part 16 Lower seal part 17 Sealing mechanism 18 Clearance

Claims (3)

  An annular seal groove is integrally formed on one of a container body formed of a synthetic resin material and a lid formed of a synthetic resin material that opens and closes the container body, and an annular seal protrusion is integrally formed on the other. Forming an upper seal surface on one of the inward peripheral wall surface and the outward peripheral wall surface facing each other at an interval, and forming a lower seal surface on the other side by shifting the position in the height direction of the container body, An upper seal portion and a lower seal portion are formed on the upper and lower portions of the annular seal protrusion along the height direction of the container body so as to correspond to the upper seal surface and the lower seal surface, respectively, and the upper seal portion is In order to make sliding contact with the upper seal surface, the upper portion of the annular seal protrusion is formed with high rigidity, and in order to elastically press the lower seal portion against the lower seal surface, In the airtight container in which the lower part of the annular seal protrusion is formed with low rigidity so as to be flexibly deformed, and the annular seal protrusion is inserted into the annular seal groove to hermetically seal the inside of the container body. An airtight container, wherein the container body and the lid are formed of different kinds of synthetic resin materials.   2. The airtight container according to claim 1, wherein the container body and the lid are formed of synthetic resin materials of the same kind and different hardness instead of forming the same with different types of synthetic resin materials. .   A gap allowing deformation of the upper part of the annular seal protrusion is formed between one of the inward peripheral wall surface and the outward peripheral wall surface having the lower seal surface and the upper part of the annular seal protrusion. The airtight container according to claim 1 or 2, characterized in that

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