JP2010137898A - Resin-made encapsulating container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin-made encapsulating container which has fewer reinforcing ribs, and is easily manufactured. <P>SOLUTION: The resin-made encapsulating container is a flat container having the width of side faces being smaller to those of surface and back side faces. The surface and back side faces 11 are entirely projected in the direction of the main axis 10 connecting a mouth part 2 of the container to a bottom part 13 and the direction orthogonal thereto. In one of these directions, a strong curve of the smaller radius of curvature is formed, and in the other direction, a weak curve of the larger radius of curvature is formed. An area formed by connecting portions close to both ends in the direction of strong curvature in the direction of the weak curvature forms a low-strength area 11Lv, and ribs 15 extending along the direction of weak curvature are formed of very small recesses and/or very small projections of a container wall on the areas of weak strength. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a resin enclosure containing contents.

  Resin-made containers are frequently used as enclosing containers for containing contents, and are used for enclosing various contents such as volatile chemicals such as fragrances, beverages, foods, seasonings, and medicines. . The resin enclosure is high in strength, lightweight, and excellent in design.

  On the other hand, the resin constituting the container is desired to reduce the amount used per container not only for the purpose of cost reduction but also for the problem of non-decomposability and generation of combustion gas after disposal. However, if the amount of resin in the container is reduced, the container wall must be thinned, resulting in a decrease in mechanical strength, resulting in the following problems.

  A container with reduced mechanical strength is easily deformed by an impact at the time of movement or an external force when gripped by hand, and the deformation makes it difficult to restore the original shape or gives a feeling of fragility at the time of gripping. In addition, resin-filled containers have the property of releasing vaporized components in the contents through the container wall, although in small quantities each in the distribution storage process such as storage, transportation, display, and storage after purchase. is there. As a result, as the time elapses, the internal volume decreases little by little, causing a problem that the container wall is deformed so as to be recessed due to the reduced pressure in the container. This problem also occurs when the content is a liquid or gel, or a solid or granular material having a volatile component, and is particularly affected in the case of a volatile agent such as a fragrance (including a deodorant). Further, depending on the contents, there is a thing in which the temperature is lowered after the enclosure in the container and the volume of the contents itself is reduced.

  In order to cope with these, a structure in which a part of the container wall is bent into a concave shape or a convex shape to form vertical or horizontal reinforcing ribs to enhance the wall strength is known (for example, Patent Document 1, 2 and 3).

In addition, there has been proposed an apparatus that suppresses deformation of the container due to internal decompression by setting the product of the weight of the container and the value of the radius of curvature and the thickness of the body label part within a predetermined range (patent) Reference 4).
Japanese Utility Model Publication No. 63-97607 JP 2000-309329 A JP 2002-326619 A JP 2003-226316 A

  However, conventional enclosures provided with reinforcing ribs are provided with a large number of ribs in order to increase the wall strength. As a result, the area of the display unit for printing and labeling on the contents can be reduced. When the outer periphery of the container is covered with shrink wrapping, there has been a problem that a number of wrinkles are generated on the shrink film.

  In addition, the product of the value of the radius of curvature and the thickness of the barrel label portion of the container within a predetermined range requires adjustment of the radius of curvature and the thickness within a limited range. The control is complicated, especially in the case of thin containers.

  An object of the present invention is to solve these problems of the prior art, and to provide a resin enclosure that can reduce the number of reinforcing ribs and is easy to manufacture.

  In order to achieve the above object, the present invention provides a flat container having a small side width with respect to the front and rear surfaces, the main surface connecting the mouth and the bottom of the container, and a direction perpendicular to the main surface. One of these directions is strongly curved with a small radius of curvature, and the other is weakly curved with a large radius of curvature, and both end portions in the strongly curved direction are connected to the weakly curved direction. The resin-enclosed container is characterized in that a region formed in this manner is a low-strength region, and ribs extending along the direction of the weak curve are formed in the low-strength region by minute concave portions and / or minute convex portions of the container wall Is to provide.

[Action]
The resin-enclosed container according to the present invention is very efficient in reinforcing the ribs when the ribs are formed on the flat container having a small side width with respect to the front and back surfaces by the minute concave portions and / or the minute convex portions of the container wall. It's something you get well. Thereby, a high intensity | strength container is obtained with few ribs. As a result, a large display area can be secured on the front and back surfaces. Moreover, when covering a container with shrink packaging, it can prevent thru | or suppress that a wrinkle generate | occur | produces in a shrink film with a rib.

  The flat shape of the container is required from various points such as securing a large display area on the front and back surfaces, ease of gripping, storing efficiency in a large number of storage boxes and the like, and aesthetics. On the other hand, the strength (hardness of bending) of the container wall against the external force acting toward the inside of the container is better when the radius of curvature of the convex shape of the container wall is smaller, but this is in a direction that weakens the flatness of the container. Lead. The strength is also better when the wall thickness of the container wall is thicker, but this leads to an increase in the amount of resin used.

  On the other hand, in the present invention, the convex shape is limited by setting one of the main axis direction of the container and the direction perpendicular thereto to a weak curve having a large curvature radius, thereby ensuring a flat shape. The other direction is a strong curve having a small radius of curvature, but a region formed by connecting portions near both ends thereof to the weak curve direction is a low-strength region. This low-strength region can be formed into an advantageous form for realizing a flat container with a small amount of resin used, such as adjusting the convex curvature radius or reducing the wall thickness. Then, by forming ribs extending along the direction of the weak curve in the low-strength region by the minute concave portions and / or the minute convex portions of the container wall, the strength of the region is increased and the strength of the entire container is ensured. Can do.

  As described above, according to the present invention, a high-strength container can be obtained with a small number of ribs provided at both end portions of the front and back surfaces. As a result, a large display area can be ensured at the center of the front and back surfaces. Moreover, when covering a container with shrink packaging, it can prevent thru | or suppress that a wrinkle generate | occur | produces in a shrink film with a rib.

  This resin-enclosed container can be easily manufactured because ribs may be formed in the specific region by minute concave portions and / or minute convex portions of the container wall.

  Ensuring strength by forming this small number of ribs is effective in securing the flat shape of the container, and is particularly effective when the maximum separation distance on both sides of the container is 80% or less of the maximum separation distance on the front and back surfaces of the container. It is more effective when it is 70% or less. When the ratio is a thick shape exceeding the upper limit, the restriction on the convex shape of the container is low, and strength can be ensured by the convex shape, so the effect of rib formation is low. In addition, this ratio is appropriately determined according to the capacity of the container, the thickness of the container wall, the design, etc., but the container wall is thinned, the number of ribs and the installation range are limited, and the container having a practical capacity. In order to achieve this, it is preferably 40% or more, and more preferably 50% or more.

  Regarding the strong and weak curves, the radius of curvature in the main axis direction and the direction perpendicular thereto means the radius of curvature of the overall shape of the container in these directions, and is used for local decoration and reinforcement. Therefore, the uneven shape is excluded.

  As described above, according to the present invention, it is possible to provide a resin enclosure which can reduce the number of reinforcing ribs and can be easily manufactured.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same or similar parts in the drawings are denoted by the same reference numerals and description thereof is partially omitted. 1 to 4 show an embodiment of a resin enclosure according to the present invention. FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG.

  This resin enclosure includes a body portion 1 and a mouth portion 2, and the mouth portion 2 is opened and closed by screwing and releasing the male screw portion 21 and the female screw 31 of the cap 3. FIG. 1 shows a state in which the cap 3 is removed, and the cap 3 is shown in cross section. FIG. 2 shows a state in which the container mouth is closed by the cap 3.

  The trunk | drum 1 has the front and back 11, the side surface 12, and the bottom face 13, and has comprised the flat shape in the perpendicular direction. The front and back surfaces collectively refer to the front side surface and the back side surface both when the front side surface and the back side surface of the body portion are distinguished from each other and when they are not distinguished.

  The front and back surfaces 11 have the following convex shape. That is, it is entirely convex in a direction along the main axis 10 connecting the central portions of the mouth portion 2 and the bottom surface 13 of the container (vertical direction in this embodiment) and in a direction perpendicular thereto (horizontal direction in this embodiment). It has a shape. The curve in the vertical direction V is a weak curve with a large radius of curvature, and the curve in the horizontal direction H is a strong curve with a small radius of curvature. In this embodiment, as described in detail below, in the horizontal cross section at each position in the height direction of the container, the curve in the horizontal direction H is formed to have a substantially constant curvature over the entire width 11A of the front and back surfaces. Yes.

  At the position P0 (see FIG. 1) where the distance between the front and back surfaces is the largest, that is, a position P0 (see FIG. 1) slightly above the center in the vertical direction of the trunk, the curvature is RC0 over the entire width of the front and back surfaces 11A. It is almost constant. FIG. 5 shows a horizontal cross section of the container at the position P0. The radius of curvature decreases as it goes above and below the position P0, but the radius of curvature is substantially constant in each horizontal section. FIG. 6 shows a horizontal cross section of the container at a position P1 (see FIG. 1) slightly below the position P0, and the radius of curvature is substantially constant at RC1. Further, the thickness of the container wall is substantially constant over the entire width of the front and back surfaces, and is uniform.

  In addition, the curvature radius of the front and back surfaces of the container being almost constant means a uniform state with a small fluctuation with respect to a predetermined curvature radius, and the width of the fluctuation is preferably within 5%, preferably within 2%. Is more desirable.

  In this embodiment, the weak curvature in the vertical direction V is slightly smaller than the curvature radius Rq of the lower portion 11Q, as shown in FIG. However, the radius of curvature of the weak curve can be variously set, for example, almost constant throughout.

  As a result of the above configuration, the strength of the container wall with respect to the external force directed inward of the container is as follows. As shown in FIG. 7, when an external force is applied to one place on the front and back surfaces 11, an adjacent region rises as shown by a broken line in the drawing in accordance with the depression of the container wall at that place. In addition, the figure has expanded and shown the deformation amount for easy understanding. As shown in FIG. 7 (a), when an external force F1 is applied to the center of the front and back surfaces 11 in the width direction (the center of the strong bending direction), the range where the bulging is allowed is mainly near both sides of the container (both sides in the strong bending direction). (Near) region L1. On the other hand, as shown in FIG. 7 (b), when the external force F2 is applied to the position of the front and back surfaces 11 near the end in the width direction (close to the end in the strong bending direction), the range where the bulging is allowed is mainly the surface. The region L2 occupies more than half of the width direction (strong bending direction) of the back surface 11.

  Thus, the range in which the bulging of the container wall is larger when the external force is applied to a position near the end of the front and back surfaces 11 than when the external force is applied to the center. Therefore, the case where the external force acts near the ends of the front and back surfaces 11 is more likely to be raised than the case where the external force acts on the center portion. Indentation is likely to occur. Moreover, since the curvature radius of the horizontal cross section in each position of the height direction is substantially constant, the front and back surfaces 11 exist in the container height direction (weakly curved direction) continuously in the region near the end. The low strength region 11Lv is formed. In the present invention, ribs are formed in the low-strength region 11Lv by minute concave portions and / or minute convex portions of the container wall, thereby increasing the strength of the region and ensuring the strength of the entire container. The term “low-strength region” means that the strength is low if there is no rib, and it is expressed as low strength, and the strength of the same region becomes sufficiently high due to the formation of the rib. ing.

The main dimensions of the illustrated resin enclosure are as follows.
-Container height Ah: 156mm
・ Body height 1h: 110mm
-Front and back width 11w: 94mm
-Side width 12w: 18mm
-Height P0h from bottom to position P0: 68mm
・ Height P1h from bottom to position P1: 40mm
-Curvature radius Rp of weak curve (vertical direction V): 420 mm
・ Weak curvature (vertical direction V) radius of curvature Rq: 840 mm
-Curvature radius RC0 at position P0: 60 mm
-Curvature radius RC at position P1: 45 mm
・ Vertical length 15h of rib 15: 90 mm
・ Maximum width 15w of the rib 15: 3.7 mm
・ Maximum depth 15d of rib 15: 2.5 mm
-Wall thickness of front and back surface 11: 0.6 ± 0.1 mm

  In the illustrated container, the bending in the main axis 10 direction (vertical direction V) and the direction perpendicular thereto (horizontal direction H) is constituted by the weakly curved portion, the strongly curved portion and the inflection portion as described above. By providing ribs 15 in the low-strength region 11Lv formed by making the curvature radius of the container approximately constant, the flat shape of the container is ensured, and the total number of ribs on the front and back surfaces is small, such as four ribs. High strength can be obtained. As a result, a large display area can be secured on the front and back surfaces 11. Moreover, when covering a container with shrink packaging, it can prevent thru | or suppress that a wrinkle generate | occur | produces in a shrink film with a rib.

  Since the ribs 15 are formed by minute recesses (and / or minute protrusions) on the container wall, the container can be manufactured by a normal manufacturing method such as injection blow molding, and is easy to manufacture. The resin used for manufacturing the container may be polyethylene terephthalate, polyethylene, polypropylene, or the like.

  The rib for securing the strength of the container wall only needs to be provided in the low-strength region 11Lv. As shown in FIG. 1, even if the rib passes through the other region 11Lv and extends over the two regions 11Lv. Good. FIGS. 8A and 8B show another example of the rib 15. That is, a shape extending between both ends of the region 11Lv, such as the rib 15a, a shape extending beyond the region 11Lv, such as the rib 15b, and a length capable of obtaining a necessary reinforcing effect as in the rib 15c are provided inside the region 11Lv. It can be a form that stays, a form that extends obliquely with respect to the direction of the region 11Lv, such as the rib 15d, or a plurality of forms, such as the rib 15d. The overall shape of the rib can be linear, curved, corrugated, etc., and may extend continuously or intermittently.

  9 to 12 show a resin enclosure according to another embodiment of the present invention. FIG. 9 is a front view, FIG. 10 is a side view, FIG. 11 is a plan view, and FIG. 12 is a bottom view. .

  The basic structure of this container is the same as that of the previous embodiment, and the shapes of the trunk portion 1, particularly the front and back surfaces 11 thereof, are different.

  The front and back surfaces 11 of this embodiment are generally convex in a direction along the main axis 10 (vertical direction) and in a direction perpendicular to the main axis 10 (horizontal direction). The direction of strong bending with a small radius of curvature is the reverse of the previous embodiment. That is, the curve in the main axis direction (vertical direction V) is a strong curve with a small radius of curvature, and the curve in a direction perpendicular to this (horizontal direction H) is a weak curve with a large radius of curvature (the separation distance between the front and back surfaces is the largest). The radius of curvature at a large position = Rp ′). The curve in the vertical direction V is formed as follows.

  FIG. 10 partially shows a vertical cross section at the center in the width direction of the front and back surfaces 11. As shown in the figure, the curvature radius of the front and back surfaces 11 is substantially constant at RC1 'over almost the entire height 11B. The radius of curvature in the vertical cross section decreases as it goes from the center in the width direction to the end side, but the radius of curvature in each vertical cross section is substantially constant. The thickness of the container wall is also substantially constant over the entire width of the front and back surfaces.

  In this case as well, as described with reference to FIG. 7, the external force applied to the position closer to the end in the vertical direction of the front and back surfaces 11 is greater than the external force applied to the central portion. It is easy to produce a dent at the action point. And since the curvature radius of the vertical cross section in each position in the width direction is respectively substantially constant, the front and back surfaces 11 are located in the container width direction (the direction of weak bending) and are easily recessed. Form an intensity region. And in this embodiment, the rib 15 of each front and back surface 11 is provided in the upper part by one, and the two lower parts are provided.

  Therefore, also in this embodiment, high strength of the container can be obtained with a small number of ribs while ensuring the flat shape of the container, and a large display area can be secured on the front and back surfaces 11. Moreover, it can prevent thru | or suppress that wrinkles generate | occur | produce when a container is covered with shrink packaging.

  FIGS. 13-16 has shown the resin enclosure concerning other embodiment of this invention, FIG. 13 is a front view, FIG. 14 is a side view, FIG. 15 is a top view, FIG. 16 is a bottom view. .

  The basic structure of this container is the same as that of the previous embodiment, and the shapes of the trunk portion 1, particularly the front and back surfaces 11 thereof, are different. The front and back surfaces 11 of this embodiment are generally convex in a direction (vertical direction) along the main axis 10 connecting the central portions of the mouth portion 2 and the bottom surface 13 of the container and a direction perpendicular to the main axis 10 (horizontal direction). I am doing. The curve in the vertical direction V is a weak curve with a large radius of curvature, and the curve in the horizontal direction H is a strong curve with a small radius of curvature. The weak curvature in the vertical direction V is the same as that shown in FIG. 2 for the previous embodiment. In this embodiment, the curve in the horizontal direction H is formed as follows.

  At a position where the separation distance between the front and back surfaces is the largest, that is, at a position P0 (see FIG. 13) slightly above the center in the vertical direction of the trunk, the curvature is substantially constant over the entire width 11A of the front and back surfaces ( The radius of curvature is R0). FIG. 17 shows a horizontal cross section of the container at the position P0. On the other hand, above and below the position P0, the central portion has a small radius of curvature in the body width direction and a large curvature radius on both sides. That is, the shape of the strong curve on the front and back surfaces consists of an inflection portion. FIG. 18 shows a horizontal cross section of the container at a position P1 (see FIG. 1) slightly below the position P0. As shown in the figure, the curve is a portion where the central portion in the width direction of the front and back surfaces has a small radius of curvature. 11S (curvature radius = R1), and both side portions are portions 11L (curvature radius = R2) having a large curvature radius. In this embodiment, these radii of curvature R0, R1, and R2 are 60 mm, 45 mm, and 60 mm, respectively.

  By distributing the portion 11L having a large curvature radius among the different curvature portions along the weak bending direction (vertical direction V), the low-strength region 11Lv (with diagonal lines in FIGS. 13 and 14) centered on the distribution portion. Formed area). Since this region has a larger radius of curvature than the other regions both in the main axis direction (vertical direction V) and in the direction perpendicular thereto (horizontal direction H), the strength against the force toward the inside of the container is low as it is. . In addition, due to the deformability described with reference to FIG. 7, the portion 11 </ b> L having a large radius of curvature near the width direction end portions of the front and back surfaces 11 is easily deformed. On the other hand, the strength can be improved by forming the rib 15 in the low-strength region 11Lv by the minute concave portion of the container wall.

  Therefore, also in this embodiment, a high-strength container can be obtained with a small number of ribs 15 provided at the portions near both ends of the front and back surfaces 11. As a result, a large display area can be secured at the center of the front and back surfaces 11. Moreover, when covering a container with shrink packaging, it can prevent thru | or suppress that a wrinkle generate | occur | produces in a shrink film with a rib.

In order to obtain the above effect, the curvature radius R1 is preferably 20 to 100 mm, and more preferably 40 to 70 mm. Further, the curvature radius R2 is equal to the curvature radius R1.
Desirably, the range is (R1 + 5 mm) <R2 <(R1 + 40 mm).
The range of (R1 + 10 mm) <R2 <(R1 + 25 mm) is more desirable.

  If the curvature radii R1 and R2 exceed the above upper limit, it becomes difficult to obtain the strength of the front and back surfaces due to the convex shape. Moreover, if curvature radius R1, R2 becomes small exceeding the said minimum, a convex shape will become strong and the flat shape of a container will be impaired.

  FIG. 19 shows another form of the low intensity region 11Lv in the embodiment shown in FIGS. That is, instead of forming the low-strength regions near the ends in the width direction of the front and back surfaces 11 with the magnitude of the curvature in the strong bending direction, the thickness of the container wall is changed. At a position P0 (see FIG. 13) where the separation distance between the front and back surfaces is the largest, as shown in FIG. 19, the curvature has a substantially constant curvature (curvature radius = RC0) over the entire width 11A of the front and back surfaces. Yes. The wall thickness T1 of the center portion 11C in the width direction of the front and back surfaces 11 is increased, and the wall thickness T2 of the end portion portion 11D is decreased. In the figure, the wall thickness is shown enlarged for easy understanding.

  The thick wall portion and the thin wall portion are distributed along the weak bending direction (vertical direction V). As a result, a region with a thin wall thickness is formed as a low-strength region 11Lv (corresponding to the hatched region in FIG. 13 described above). This low-strength region is low in strength against the force toward the inside of the container as it is. In addition, due to the deformability described with reference to FIG. 7, the portion 11 </ b> L having a large radius of curvature near the width direction end portions of the front and back surfaces 11 is easily deformed. On the other hand, the strength can be improved by forming the rib 15 in the low-strength region 11Lv by the minute concave portion of the container wall.

  For example, the wall thickness T1 of the front and back surfaces 11 can be set to 0.7 mm, and the wall thickness T2 can be set to 0.3 mm. The wall thickness of the side wall 12 and the bottom wall can be 1 to 1.5 mm.

  Also in this embodiment, a high-strength container can be obtained with a small number of ribs 15 provided at the portions near both ends of the front and back surfaces 11. As a result, a large display area can be secured at the center of the front and back surfaces 11. Moreover, when covering a container with shrink packaging, it can prevent thru | or suppress that a wrinkle generate | occur | produces in a shrink film with a rib. Moreover, according to this embodiment, since the wall thickness is reduced at the portions near the ends of the front and back surfaces, the amount of resin used can be further reduced.

  Note that the change in the wall thickness in this embodiment (the form in which the wall thickness is reduced in the low-strength region) may be combined with the formation form of the low-strength region shown in the above-described embodiment.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various change is possible. For example, ribs can be provided in the number necessary to obtain a reinforcing effect, and ribs for decorative purposes can be additionally provided as long as functions such as ensuring a smooth surface on the front and back surfaces are satisfied. . The ribs can be formed by minute protrusions in addition to the minute recesses on the container wall, or a combination thereof. The cross-sectional shape of the rib can be various shapes such as an arc shape, a square shape such as a triangle or a quadrangle, and a waveform.

  The overall shape of the container has various shapes such as a rectangular shape such as a rectangle or a triangle when viewed from the front, a round shape such as a circle or an ellipse, and a rectangular shape such as a rectangle or a triangle when viewed from the side, an ellipse, or the like. It can be.

It is a front view of one embodiment of a resin enclosure according to the present invention. It is a side view of the resin enclosure shown in FIG. It is a top view of the trunk | drum of the resin enclosure shown in FIG. It is a bottom view of the resin enclosure shown in FIG. FIG. 2 is a cut end view at one place of the resin enclosure shown in FIG. 1. It is the cutting | disconnection end elevation in the other location of the resin enclosure shown in FIG. It is explanatory drawing regarding a deformation | transformation of the resin enclosure shown in FIG. It is a front view of a container with various forms of a rib. It is a front view of the resin enclosure according to another embodiment of the present invention. FIG. 10 is a side view of the resin enclosure shown in FIG. 9. FIG. 10 is a plan view of the resin enclosure shown in FIG. 9. FIG. 10 is a bottom view of the resin enclosure shown in FIG. 9. It is a front view of other embodiment of the resin enclosure according to the present invention. It is a side view of the resin enclosure shown in FIG. FIG. 14 is a plan view of the resin enclosure shown in FIG. 13. It is a bottom view of the resin enclosure shown in FIG. FIG. 14 is a cut end view at one place of the resin enclosure shown in FIG. 13. FIG. 14 is a cut end view of another part of the resin enclosure shown in FIG. 13. It is a cut end view in one place of the resin enclosure concerning other embodiments of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trunk part 2 Mouth part 3 Cap 10 Main axis | shaft 11 Front and back surface 11S Small curvature radius part 11L Large curvature radius part 11Lv The area | region where a large curvature radius extends along a weak curve direction 11Lh A large curvature radius part is a weak curve direction Area 12 extending along side surface 13 Bottom surface 15, 15a, 15b, 15c, 15d Rib

Claims (8)

  In a flat container having a small side width with respect to the front and back surfaces, the front and back surfaces are generally convex in the main axis direction connecting the mouth portion and the bottom portion of the container and in the direction perpendicular thereto, both of these directions. One of the above is a strong curve with a small radius of curvature, the other is a weak curve with a large radius of curvature, and a region formed by connecting both end portions in the strong curve direction to the weak curve direction is a low strength region, A resin encapsulated container, wherein a rib extending along the direction of the weak curve is formed in the low-strength region by a minute concave portion and / or a minute convex portion of a container wall.   The resin enclosure according to claim 1, wherein the low-strength region is formed by making the container wall have a uniform radius of curvature in the direction of the strong curve.   The low-strength region is formed around the region of the curvature radius by making the radius of curvature of the container wall larger in the low-strength region than the other regions in the strong bending direction. Item 4. A resin enclosure according to Item 1.   The said low intensity | strength area | region is formed by making wall thickness of a container wall thinner than the other area | region in the said strong curve direction in this low intensity | strength area | region. The resin enclosure described in 1.   The resin enclosure according to any one of claims 1 to 4, wherein the main axis direction is weakly curved, and a direction perpendicular to the main axis direction is strongly curved.   The resin enclosure according to any one of claims 1 to 4, wherein the main axis direction is strongly curved, and a direction perpendicular to the main axis direction is weakly curved.   The resin enclosure according to any one of claims 1 to 6, wherein the rib extends along a weakly curved direction.   The resin enclosure according to any one of claims 1 to 7, wherein the maximum separation distance on both sides of the container is 80% or less of the maximum separation distance on the front and back surfaces of the container.

Images