Container with pump

Abstract

To provide a container with a pump which can surely peel an inside extension part of an inner container body from an outside extension part of an outer container body.SOLUTION: There is provided a container 1 with a pump, in which a double container 10 has an outer container body 11 having an outer mouth part and an outside extension part, an inner container body having an inner mouth part and an inside extension part which is reducible in volume and deformable, a projection holding a gap for outside air introduction between the outer mouth part and the inner mouth part, and an outside air introduction port which is provided on a mouth part 13 and makes the gap for outside air introduction communicate with outside of the double container 10. The outer mouth part has an installation part, a neck ring part, and a straight part, the outside extension part includes an outside shoulder part, an outside body part, and an outside bottom part, the outside extension part is arranged with an upper end 31 on a side closer to the side of the straight part than a position such that the inner diameter of the inside extension part facing the outside shoulder part is 2.5 times of the inner diameter of the inner mouth part facing the straight part, and a recess 30 arranged with a lower end 32 is provided on the outside body part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pump-equipped container having a double container made of synthetic resin and a pump-type discharge device attached to the opening of the double container. [Background technology]

[0002] Conventionally, pump-equipped containers have been known as containers for storing contents such as cosmetics such as lotion, and toiletries such as shampoo, conditioner, and liquid soap, and have a double container made of synthetic resin and a pump-type discharge device attached to the opening of the double container (see, for example, Patent Document 1).

[0003] In such a pump-equipped container, when the contents are discharged from the pump-type discharge device, outside air is introduced between the outer container body and the inner container body through an outside air inlet provided at the mouth of the outer container body that constitutes the double container, thereby reducing the volume and deformation of only the inner container body.This prevents outside air from being introduced into the interior of the inner container body after the contents have been poured out, and prevents deterioration or alteration of the contents contained in the double container. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-203282 Summary of the Invention [Problem to be solved by the invention]

[0005] The double container used in the above-mentioned conventional pump-equipped container differs from that used in squeeze-discharge type containers in that the outer container body is formed to be relatively thick (for example, 0.5 mm or more) and is configured so that the outer shape is maintained constant before, after, or during the discharge of the contents by operating the pump-type discharge device.

[0006] On the other hand, the double container used in the above-mentioned conventional pump-equipped container is formed by blow molding a double preform that combines an outer preform for forming the outer container body and an inner preform for forming the inner container body.

[0007] However, although a double container of this configuration can secure an outside air introduction gap between the outer opening and the inner opening that is connected to the outside air introduction port, in particular at the shoulder portion formed by stretching the double preform, the inner extension portion (inner layer) of the inner container body adheres to the outer extension portion (outer layer) of the outer container body and is difficult to peel off from the outer extension portion, which prevents outside air from being introduced into the body side through the outside air introduction gap at this adhered portion, and there is a risk of problems occurring such as a reduction in the amount of contents discharged when the pump-type discharge device is operated or the pump-type discharge device not being able to return to its original position.

[0008] The present invention aims to solve these problems, and its object is to provide a pump-equipped container that allows the inner extension of the inner container body to be reliably peeled off from the outer extension of the outer container body. [Means for solving the problem]

[0009] The pump-equipped container of the present invention is a pump-equipped container having a double container made of synthetic resin and a pump-type discharge device attached to the mouth of the double container, wherein the double container comprises an outer container body having an outer mouth that is cylindrical about its axis and forms the outer shell of the mouth, and an outer extension connected to the lower end of the outer mouth; an inner container body having a cylindrical inner mouth that is coaxially arranged inside the outer mouth, and an inner extension connected to the lower end of the inner mouth and laminated on the inner surface of the outer extension, which is compressible and deformable; a protrusion provided on either the inner circumferential surface of the outer mouth or the outer circumferential surface of the inner mouth so as to protrude toward the other, maintaining a gap for introducing outside air between the outer mouth and the inner mouth; and a protrusion provided on the mouth that maintains the gap for introducing outside air. and an outside air inlet port that connects the gap between the inner opening and the outside of the double container, wherein the outer opening comprises an attachment section to which an attachment cap of the pump-type discharge device is attached, a neck ring section connected to the lower end of the attachment section, and a cylindrical straight section connected to the lower end of the neck ring section, and the outer extension section comprises an outer shoulder section that expands in diameter from above downward, a cylindrical outer body section connected to the lower end of the outer shoulder, and an outer bottom section that closes the lower end of the outer body, and the outer extension section has a recess whose upper end is located closer to the straight section than a position where the inner diameter of the inner extension section facing the outer shoulder is 2.5 times the diameter of the inner opening section facing the straight section, and whose lower end is located in the outer body.

[0010] In the pump-equipped container of the present invention, in the above configuration, it is preferable that the outer shoulder portion has an inclined portion that is connected to the straight portion and has a linear vertical cross-sectional shape on one side across the axis, and a connecting portion that is connected to the inclined portion and the outer body portion and has a curved vertical cross-sectional shape on one side across the axis, and that the upper end of the recess is positioned on the inclined portion.

[0011] In the pump container of the present invention, in the above configuration, it is preferable that the length of the portion of the recess provided on the outer shoulder portion is longer than the length of the portion of the recess provided on the outer body portion. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a pump-equipped container in which the inner extension of the inner container body can be reliably peeled off from the outer extension of the outer container body. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a front view of a pump-equipped container according to an embodiment of the present invention. [Figure 2] 2 is a half cross-sectional side view of the double container shown in FIG. 1. FIG. [Figure 3] FIG. 2 is an enlarged cross-sectional view of a main part of the pump-equipped container shown in FIG. [Figure 4] 2 is a partially cutaway half-view of a double preform for manufacturing the double container shown in FIG. 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] The pump-equipped container of the present invention will be described in more detail below with reference to the drawings.

[0015] In this specification, claims and abstract, "upper" means "upper" when the pump-equipped container is in the upright position shown in Figure 1, and "lower" means the opposite side.

[0016] The pump container 1 according to one embodiment of the present invention shown in FIG. 1 can be used to store contents (liquid contents) such as cosmetics such as lotion, or toiletries such as shampoo, conditioner, and liquid soap.

[0017] The pump-equipped container 1 has a double container 10 made of synthetic resin and a pump-type discharge tool 20.

[0018] As shown in Fig. 2, the double container 10 has a double structure comprising an outer container body 11 and an inner container body 12 disposed inside the outer container body 11. As shown in Figs. 1 and 2, the outer shape of the double container 10 is bottle-shaped, having a cylindrical mouth 13 centered on axis O, a shoulder 14 integrally connected to the lower end of the mouth 13, a body 15 integrally connected to the lower end of the shoulder 14, and a bottom 16 closing the lower end of the body 15.

[0019] The outer container body 11 is a part that constitutes the outer shell of the double container 10, and as shown in Figure 2, has a cylindrical outer opening portion 11a that is formed in a cylindrical shape centered on the axis O and constitutes the outer shell of the opening portion 13, and a bottomed cylindrical outer extension portion 11b that is connected to the lower end of the outer opening portion 11a and constitutes the outer shell of the shoulder portion 14, body portion 15, and bottom 16.

[0020] The outer opening 11a is a portion that is not stretched when the double container 10 is formed by blow molding. The outer opening 11a includes an attachment portion 11a1 to which the attachment cap 21 (see FIG. 1) of the pump-type discharge device 20 is attached, a neck ring portion 11a2 connected to the lower end of the attachment portion 11a1, and a straight portion 11a3 connected to the lower end of the neck ring portion 11a2.

[0021] In this embodiment, the mounting portion 11a1 is configured with a male thread 11a4 on the outer circumferential surface of the cylindrical portion, and the mounting cap 21 of the pump-type dispensing device 20 is mounted by threaded engagement. Note that the mounting portion 11a1 may have a locking protrusion extending along the circumferential direction instead of the male thread 11a4, and the mounting cap 21 of the pump-type dispensing device 20 may be mounted by undercut engagement when the stopper is tapped.

[0022] The neck ring portion 11a2 has a substantially circular ring shape centered on the axis O, and protrudes radially outward from the axis O beyond the cylindrical portion of the mounting portion 11a1.

[0023] The straight portion 11a3 has a cylindrical shape centered on the axis O, and its outer diameter is smaller than that of the neck ring portion 11a2. The inner and outer diameters of the straight portion 11a3 are approximately constant between the upper end and the lower end.

[0024] The outer extension portion 11b is a portion that is extended when the double container 10 is formed by blow molding. The outer extension portion 11b includes an outer shoulder portion 11b1 that has a shape that expands in diameter from top to bottom and that forms the outer shell of the shoulder portion 14, an outer body portion 11b2 that has a cylindrical shape connected to the lower end of the outer shoulder portion 11b1 and that forms the outer shell of the body portion 15, and an outer bottom portion 11b3 that closes the lower end of the outer body portion 11b2 and that forms the outer shell of the bottom portion 16.

[0025] 2 and 3, the outer shoulder 11b1 has an inclined portion 11b4 that is continuous with the straight portion 11a3 of the outer opening 11a and has a linear vertical cross-sectional shape on one side thereof sandwiched between the axis O, and a connecting portion 11b5 that is continuous with the inclined portion 11b4 and the outer body portion 11b2 and has a curved (arcuate) vertical cross-sectional shape on one side thereof sandwiched between the axis O. Note that the inclined portion 11b4 is not limited to a shape that has a linear vertical cross-sectional shape on one side thereof sandwiched between the axis O, and may have various shapes, such as a shape that has a convex curved surface or a concave curved surface on one side thereof sandwiched between the axis O.

[0026] As shown in Figure 2, the inner container 12 has a cylindrical inner opening 12a that is coaxially arranged inside the outer opening 11a, and a shrinkable inner extension 12b that is connected to the lower end of the inner opening 12a and is stacked on the inner surface of the outer extension 11b.

[0027] The inner opening 12a is a portion that is not stretched when the double container 10 is formed by blow molding, and is constructed of a hard material similar to the outer opening 11a. As shown in Fig. 3, the outer diameter of the inner opening 12a is smaller than the inner diameter of the outer opening 11a. As a result, an outside air intake gap 17 is provided between the outer peripheral surface of the inner opening 12a and the inner peripheral surface of the outer opening 11a, reaching from the upper end to the lower end of the opening 13 and forming a substantially cylindrical space.

[0028] A plurality of protrusions 12c (only one is shown in FIG. 3) are arranged at equal intervals in the circumferential direction on the outer peripheral surface of the inner opening 12a. Each of these protrusions 12c is hemispherical and protrudes toward the inner peripheral surface of the outer opening 11a, with its tip abutting the inner peripheral surface of the outer opening 11a. All of the protrusions 12c protrude to the same height from the outer peripheral surface of the inner opening 12a. The shape of the protrusions 12c is not limited to a hemispherical shape and may be various shapes, such as a rib shape having a predetermined length.

[0029] By providing multiple (three in this embodiment) protrusions 12c with this configuration, the inner opening 12a can be reliably positioned inside the outer opening 11a so as to be coaxial with the outer opening 11a, thereby maintaining (creating) the outside air introduction gap 17 between the outer opening 11a and the inner opening 12a. Furthermore, since the outer opening 11a and the inner opening 12a can be positioned coaxially, the outside air introduction gap 17 can be configured as a cylindrical space whose radial width is uniform in the circumferential direction. Furthermore, by reliably fixing the inner opening 12a inside the outer opening 11a, it is possible to prevent rattling of the inner opening 12a.

[0030] In this embodiment, a protrusion 12c is provided on the outer peripheral surface of the inner opening 12a, but this is not limited to this, and a protrusion may be provided on the inner peripheral surface of the outer opening 11a, or protrusions may be provided on both the outer peripheral surface of the inner opening 12a and the inner peripheral surface of the outer opening 11a.

[0031] In this embodiment, the inner container 12 has an annular flange 12d that is integral with the upper end of the inner opening 12a and extends radially outward from the upper end. The flange 12d has its underside abutting the upper end of the outer opening 11a, positioning the inner opening 12a axially relative to the outer opening 11a. The flange 12d is not limited to being annular over the entire circumferential circumference, but can also be formed intermittently in the circumferential direction.

[0032] The inner extension portion 12b is a portion that accommodates the liquid content that is filled from the inner opening portion 12a, and is formed in a bag shape with a thinner wall than the inner opening portion 12a. The inner extension portion 12b can be peeled off from the inner surface of the outer extension portion 11b and deformed to reduce its volume.

[0033] As shown in FIGS. 2 and 3, the opening 13 is provided with an outside air inlet 18 that connects the outside air introduction gap 17 to the outside of the double container 10.

[0034] In this embodiment, the outside air inlet 18 is formed as a groove extending straight in the radial direction at the upper end of the outer opening 11a and is closed by the flange 12d of the inner-container 12. Furthermore, in this embodiment, an outer groove 19 is provided on the outer peripheral surface of the outer opening 11a, extending straight from the upper end of the outer opening 11a to the straight portion 11a3 in a direction parallel to the axis O, and the outside air inlet 18 opens into the outer groove 19. In the area where the outer groove 19 is provided, the male thread 11a4 is circumferentially divided into an intermittent shape. This configuration allows outside air to be efficiently introduced from the outside air inlet 18 into the outside air introduction gap 17 through the outer groove 19, even when the mounting cap 21 of the pump-type discharge device 20 is attached to the opening 13 by threaded connection.

[0035] The outside air introduction port 18 may be a through-hole that penetrates the outer opening portion 11a in the radial direction centered on the axis O and communicates with the outside air introduction gap 17.

[0036] In this embodiment, the double container 10 is configured such that the outer container body 11 is formed from a synthetic resin material primarily made of polyethylene terephthalate (PET), and the inner container body 12 is formed from a synthetic resin material primarily made of polypropylene (PP).

[0037] The outer opening 11a and the inner opening 12a are each made of a hard material. The outer extension 11b is made relatively thick so as to have a degree of rigidity that prevents it from easily deforming even when the content liquid is discharged to the outside. In other words, by making the outer extension 11b relatively thick, the outer shape is maintained constant before, after, or during the discharge of the content by operating the pump-type discharge device 20. The thickness of the outer body 11b2 of the outer extension 11b is preferably 0.5 mm or more, and more preferably 0.5 mm to 4.0 mm. The inner extension 12b is made thinner than the outer extension 11b so as to be able to undergo volume reduction deformation. The thickness of the portion of the inner extension 12b facing the outer body 11b2 is preferably 0.1 mm to 0.3 mm.

[0038] The double container 10 is not limited to a configuration in which the outer container body 11 is formed from a synthetic resin material primarily made of polyethylene terephthalate (PET) and the inner container body 12 is formed from a synthetic resin material primarily made of polypropylene (PP), but may also be formed from a combination of other materials, such as a configuration in which the outer container body 11 and the inner container body 12 are each formed from a synthetic resin material primarily made of polyethylene terephthalate (PET).

[0039] As shown in FIG. 1, the pump-type discharge device 20 is attached to the mouth portion 13 of the double container 10 by means of an attachment cap 21 .

[0040] The pump-type discharge device 20 has a push-down head 22 and a pump 23. The push-down head 22 is equipped with a nozzle 22a and is supported in an upwardly biased state so that it can be pushed downward. The pump 23 is supported by the attachment cap 21 and is disposed inside the inner container 12 of the double container 10, and a suction tube 24 extending to the bottom of the inner container 12 is connected to the lower end of the pump 23.

[0041] The pump-type discharge device 20 is configured so that when the push-down head 22 is pressed down, the pump 23 is activated and the contents contained in the double container 10 are discharged to the outside from a nozzle 22a provided on the push-down head 22. When the push-down operation of the push-down head 22 is released, the push-down head 22 returns to its original position and the contents to be discharged next into the pump 23 are sucked through the suction tube 24.

[0042] As shown in FIGS. 1 and 2, the outer extending portion 11b of the outer container body 11 is provided with a recess 30.

[0043] More specifically, the recess 30 has a vertically elongated groove shape that extends vertically when viewed from the radially outer side perpendicular to the axis O, with the outer surface of the outer container body 11 recessed toward the contents of the container and the inner surface protruding toward the inside of the container. The depth of the recess 30 is preferably 0.5 mm to 4.0 mm, but is not limited to this. Furthermore, the circumferential length (groove width) of the recess 30 about the axis O at the opening along the outer peripheral surface of the outer extension portion 11b is preferably 1 to 5 times the depth of the recess 30. Furthermore, the cross-sectional shape of the recess 30 perpendicular to the longitudinal direction is preferably, but is not limited to, a semicircular, U-shaped, V-shaped, or trapezoidal shape. In this embodiment, the cross-sectional shape of the recess 30 perpendicular to the longitudinal direction is a semicircular shape.

[0044] As shown in FIG. 2, the upper end 31 of the recess 30 is located closer to the straight portion 11a3 than the position where the inner diameter of the inner extension 12b facing the outer shoulder 11b1 is 2.5 times the inner diameter D1 of the inner opening 12a facing the straight portion 11a3 (the diameter indicated by D2 in FIG. 2). That is, the upper end 31 of the recess 30 is located on the outer shoulder 11b1, inside the diameter 2.5 times the inner diameter D1 of the inner opening 12a facing the straight portion 11a3. In this embodiment, the portion of the outer shoulder 11b1 inside the diameter 2.5 times the inner diameter D1 of the inner opening 12a facing the straight portion 11a3 is an inclined portion 11b4, and the upper end 31 of the recess 30 is located on the inclined portion 11b4. Meanwhile, the lower end 32 of the recess 30 is located in the outer body 11b2. That is, the recess 30 is provided across the outer shoulder 11b1 and the outer body 11b2, including a position with a diameter 2.5 times the inner diameter D1 of the inner opening 12a facing the straight portion 11a3. In this embodiment, the inner diameter at the upper end of the inner extension 12b facing the outer body 11b2 is larger than 2.5 times the inner diameter D1 of the inner opening 12a facing the straight portion 11a3.

[0045] In this embodiment, it is preferable that the length of the portion of the recess 30 provided on the outer shoulder 11b1 (the length from the upper end 31 to the lower end of the outer shoulder 11b1) is longer than the length of the portion provided on the outer body 11b2 (the length from the upper end to the lower end 32 of the outer body 11b2).

[0046] In this embodiment, only one recess 30 is provided in the outer extending portion 11b constituting the outer container body 11, but a plurality of recesses 30 may be provided.

[0047] The pump container 1 according to this embodiment having the above configuration can dispense a predetermined amount of the contents contained in the double container 10 to the outside from the nozzle 22a by pressing down the depression head 22 of the pump-type dispensing device 20. When the contents contained in the inner extension 12b of the inner container 12 are dispensed to the outside, outside air is introduced into the outside air introduction gap 17 through the outer groove 19 and the outside air inlet 18 provided in the outer opening 11a, and the outside air is also introduced between the outer extension 11b and the inner extension 12b, causing the inner extension 12b to undergo volume reduction deformation so as to reduce the internal volume by the amount of the reduced contents, while maintaining the shape of the outer extension 11b.

[0048] The double container 10 used in the pump-equipped container 1 according to this embodiment can be formed by blow molding a double preform 40 made of synthetic resin and having the structure shown in FIG.

[0049] The double preform 40 has a double structure comprising an outer preform 41 for forming the outer container body 11 and an inner preform 42 for forming the inner container body 12. The outer preform 41 is made of a synthetic resin material mainly made of polyethylene terephthalate (PET) like the outer container body 11, and the inner preform 42 is made of a synthetic resin material mainly made of polypropylene (PP) like the inner container body 12.

[0050] The outer preform 41 has an outer opening 41a and a cylindrical, bottomed main body 41b connected to the lower end of the outer opening 41a. The outer opening 41a is a portion that is not stretched by blow molding, and has the same shape as the outer opening 11a of the outer container body 11. In other words, when the double preform 40 is blow molded to form the double container 10, the outer opening 41a of the outer preform 41 becomes the outer opening 11a of the double container 10. The main body 41b is a portion that is stretched by blow molding, and when the double preform 40 is blow molded to form the double container 10, the main body 41b of the outer preform 41 becomes the outer extension 11b of the double container 10.

[0051] The inner preform 42 has an inner opening 42a and a cylindrical, bottomed body 42b connected to the lower end of the inner opening 42a, and is assembled inside the outer preform 41. The inner opening 42a is a portion that is not stretched by blow molding, and has the same shape as the inner opening 12a of the inner container 12. In other words, when the double preform 40 is blow molded to form the double container 10, the inner opening 42a of the inner preform 42 becomes the inner opening 12a of the double container 10. The body 42b is a portion that is stretched by blow molding, and when the double preform 40 is blow molded to form the double container 10, the body 42b of the inner preform 42 becomes the inner extension 12b of the double container 10.

[0052] The double container 10 used in the pump-equipped container 1 according to this embodiment is molded into the above-described shape by first heating the double preform 40 having the above-described configuration to a temperature at which it can be stretched, and then blow molding it using a mold (not shown). At this time, by providing a protrusion corresponding to the recess 30 on the inner surface of the mold, the recess 30 is formed in the double container 10 during blow molding.

[0053] Here, when the double preform 40 is blow molded to form the double container 10, if the main bodies 41b, 42b of the double preform 40 are stretched, the main body 42b of the stretched inner preform 42 adheres closely to the inner surface of the main body 41b of the stretched outer preform 41, making it difficult for the inner extension 12b to peel from the inner surface of the outer extension 11b in the molded double container 10. In particular, the inner extension 12b is likely to adhere closely to the inner surface of the outer extension 11b in a portion exceeding 2.5 times the inner diameter D1 of the inner opening 12a facing the straight portion 11a3 of the outer opening 11a. In the double container 10 of this embodiment, the portion of the inner opening 12a facing the straight portion 11a3 of the outer opening 11a that is greater than 2.5 times the inner diameter D1 is located in the outer shoulder 11b1, and the inner extension 12b is particularly likely to adhere to the inner surface of the outer extension 11b at the connection between the outer shoulder 11b1 and the outer body 11b2. If the inner extension 12b adheres to the inner surface of the outer extension 11b at the outer shoulder 11b1, the introduction of outside air from the outside air inlet gap 17 to the body 15 side may be hindered, which may result in problems such as a reduction in the amount of content dispensed when the pump-type dispenser 20 is operated or failure of the pump-type dispenser 20 to return to its original position.

[0054] In contrast, in the pump-equipped container 1 of this embodiment, a recess 30 is provided in the outer extension portion 11b of the outer container body 11, with its upper end 31 located closer to the straight portion 11a3 than the position where the inner diameter D2 of the inner extension portion 12b facing the outer shoulder portion 11b1 is 2.5 times the inner diameter D1 of the inner mouth portion 12a facing the straight portion 11a3, and its lower end 32 located in the outer body portion 11b2.Therefore, during blow molding, a gap can be created between the outer extension portion 11b and the inner extension portion 12b, extending from the side of the straight portion 11a3, where the inner extension portion 12b is less likely to adhere to the inner surface of the outer extension portion 11b, through the part where the inner extension portion 12b is more likely to adhere to the inner surface of the outer extension portion 11b, and reaching the outer body portion 11b2. That is, the double container 10 has a gap between the outer extending portion 11b and the inner extending portion 12b in the portion where the recess 30 is provided.

[0055] As a result, when the pump-type discharge device 20 is operated, outside air introduced from the outside air inlet 18 into the outside air introduction gap 17 is reliably introduced through the gap to the body 15 side, thereby reliably separating the inner extension 12b of the inner container body 12 from the outer extension 11b of the outer container body 11. Note that in the body 15, the inner extension 12b is easily affected by reduced pressure due to a decrease in the contents, so introducing outside air to the body 15 side allows the inner extension 12b to be easily separated from the outer body 11b2.

[0056] Furthermore, as described above, the inner extension portion 12b of the inner container body 12 can be reliably peeled off from the outer extension portion 11b of the outer container body 11, so that when the pump-type dispenser 20 is operated, it is possible to prevent the amount of content being dispensed from decreasing or the pump-type dispenser 20 from failing to return to its original position.

[0057] Furthermore, by providing the recess 30, a gap is formed between the outer extension portion 11b and the inner extension portion 12b during blow molding, so that it is not necessary to perform an initial peeling step after blow molding to peel the inner extension portion 12b from the outer extension portion 11b by means of blowing air between the outer extension portion 11b and the inner extension portion 12b or by reducing the pressure inside the inner extension portion 12b.

[0058] Furthermore, in the pump-equipped container 1 of this embodiment, the outer shoulder portion 11b1 has an inclined portion 11b4 that is connected to the straight portion 11a3 and has a linear vertical cross-sectional shape on one side of the axis O, and a curved connecting portion 11b5 that is connected to the inclined portion 11b4 and the outer body portion 11b2 and has a curved vertical cross-sectional shape on one side of the axis O that is convex outward from the container, and the upper end 31 of the recess 30 is arranged at the inclined portion 11b4, which more reliably creates a gap between the outer extension portion 11b and the inner extension portion 12b at the upper end 31 of the recess 30, and when the pump-type discharge device 20 is operated, outside air introduced from the outside air inlet 18 into the outside air introduction gap 17 can be more reliably introduced to the body portion 15 side through the gap.

[0059] Furthermore, in the pump-equipped container 1 of this embodiment, the length of the portion provided on the outer shoulder 11b1 of the recess 30 is longer than the length of the portion provided on the outer body 11b2 of the recess 30, so that a gap can be reliably formed between the outer extension portion 11b and the inner extension portion 12b at the outer shoulder 11b1, where adhesion is likely to occur.

[0060] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0061] For example, the pump-type discharge device 20 is not limited to the above configuration, and various types can be used. [Explanation of symbols]

[0062] 1 pump container 10 double container 11 Outer container body 11a External opening 11a1 Mounting part 11a2 Neck ring part 11a3 straight section 11a4 male thread 11b Outer extension 11b1 Outside shoulder 11b2 Outer body 11b3 Outer bottom 11b4 Slope 11b5 Connection 12 Inner container body 12a Inner mouth 12b Inner extension part 12c protrusion 12d flange 13 Mouth 14 Shoulder 15 Torso 16 Bottom 17. Outside air intake gap 18 Fresh air intake 19 Outer groove 20 Pump-type discharge device 21 Mounting cap 22 Press-down head 22a nozzle 23 Pump 24 Suction tube 30 recess 31 Upper end 32 Bottom end 40 double preform 41 Outer preform 41a External opening 41b Main body 42 inner preform 42a Inner mouth 42b Main body O axis D1 Inner diameter D2 inner diameter

Claims

1. A pump-equipped container having a double container made of synthetic resin and a pump-type discharge device attached to the mouth of the double container, The double container is an outer container body having an outer opening portion that is cylindrical and centered on an axis and forms an outer shell of the opening portion, and an outer extension portion that is connected to the lower end of the outer opening portion; an inner container including a cylindrical inner opening portion coaxially disposed inside the outer opening portion, and a shrinkable inner extension portion connected to a lower end of the inner opening portion and laminated on the inner surface of the outer extension portion; a protrusion provided on either the inner peripheral surface of the outer opening portion or the outer peripheral surface of the inner opening portion so as to protrude toward the other, and which maintains a gap for introducing outside air between the outer opening portion and the inner opening portion; an outside air inlet provided in the opening portion and connecting the outside air introduction gap to the outside of the double container, the outer opening portion comprises an attachment portion to which an attachment cap of the pump-type discharge tool is attached, a neck ring portion connected to a lower end of the attachment portion, and a cylindrical straight portion connected to the lower end of the neck ring portion; the outer extension portion includes an outer shoulder portion whose diameter increases downward, a cylindrical outer body portion connected to a lower end of the outer shoulder portion, and an outer bottom portion that closes the lower end of the outer body portion, A pump-equipped container characterized in that the outer extension portion has a recess whose upper end is located closer to the straight portion than a position where the inner diameter of the inner extension portion facing the outer shoulder portion is 2.5 times the inner diameter of the inner opening portion facing the straight portion, and whose lower end is located in the outer body portion.

2. The outer shoulder portion is an inclined portion that is connected to the straight portion and has a vertical cross-sectional shape that is linear on one side of the axis; a connecting portion that is continuous with the inclined portion and the outer body portion and has a curved vertical cross-sectional shape on one side of the axis, The pump-equipped container according to claim 1 , wherein an upper end of the recess is disposed on the inclined portion.

3. 3. The pump container according to claim 1, wherein a length of the portion of the recess provided on the outer shoulder is longer than a length of a portion of the recess provided on the outer body.

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