JP4883576B2 - Liquid ejector - Google Patents

Description

  The present invention relates to a liquid ejector, and more particularly, to a liquid ejector of a type in which a dispenser is attached to a container body composed of an outer container and a thin inner container.

  A double container with a dispenser in which a dispenser is assembled to a container body composed of an outer container and an inner container has been proposed. (For example, see Patent Document 1)

  The double container with a dispenser forms an inner body member by connecting a circular bottom plate to the lower end portion of a cylindrical film, and connecting a ring in which a male screw is engraved on the outer periphery to the upper end portion of the film, A bottle-shaped inner container formed by welding the inner body member to the lower surface of the shoulder portion of the filling port member, a dispenser integrated with the outer surface of the filling port member by undercut bonding, and closing the inner container; and an inner surface of the opening portion A bottomed cylindrical outer container that encloses an inner container so that the inner container can be inserted and removed, and the inner container and the outer container are screwed into the male screw and the female screw. It is characterized by being assembled by.

The above double container with a dispenser is undercut coupled to the inner container so that the dispenser is not rotatable relative to the inner container, and the male thread of the ring in the inner container and the female thread of the opening in the outer container are screwed together, thereby Since it is assembled to the inner fitting state, it is easy to assemble and remove the inner container from the outer container, and the outer peripheral surface of the inner container is placed between the outer peripheral surface of the shoulder of the dispenser and the outer container. By exposing it in a ring shape, it has a design effect and can be suitably used as a cosmetic container.
Japanese Patent Laid-Open No. 2004-3007048

  The above-mentioned double container with a dispenser is an excellent one that exhibits the above-mentioned specific effects, but because the inner container is formed of a cylindrical film, a bottom plate, a ring, a filling port member and many other members, Each member must be individually arranged, and they have to be integrated, which is troublesome in manufacturing and increases costs. Moreover, in order to integrate another member, at least the leakage of stored items must be concerned.

  The present invention has been made in view of the above points, and is a liquid ejector that is easy to manufacture, can be reduced in cost, does not need to worry about leakage of stored liquid, and has good liquid ejection efficiency. Propose.

  The liquid ejection container of the present invention includes a cover cylinder, an inner container, and a dispenser.

  The cover cylinder is formed of synthetic resin or the like, and has rigidity and shape retaining property that can accommodate the inner container equipped with the dispenser and make them self-supporting. The cover tube may be bottomed or may not have a bottom wall.

  The inner container is formed of a synthetic resin or the like, and preferably has a bottle shape in which the mouth and neck are erected from the upper end of the trunk through the shoulder. Further, the lower end portion and the trunk bottom wall of the barrel peripheral wall in the inner container are formed as thick portions, and the peripheral wall portion constituting the other barrel portion is formed as a flexible thin portion. The thin portion is deformed so as to reduce the internal volume due to the discharge of the storage liquid, whereas the thick portion employs a thickness that provides rigidity that is difficult to be deformed by the discharge of the storage liquid. Specifically, the thickness of the thick part or the thin part may be appropriately selected depending on the type of synthetic resin to be used, but the thickness of the thick part is preferably about 2 to 10 times the thickness of the thin part.

  Blow molding is preferably employed for the production of the inner container. For example, when the inner container is formed by blow molding using a preform, the thick part and the thin part can be easily formed. If the thickness of the thick portion forming portion or the thin portion forming portion of the preform is specified in advance from the size of the inner container or the like, the thick portion and the thin portion having the desired thickness can be formed.

  In addition, by forming the lower end portion of the barrel peripheral wall and the barrel bottom wall of the inner container as a thick portion and forming the other barrel peripheral wall as a thin portion, the thickness of the thick portion is reduced as the liquid decreases. It is configured such that the bottom wall of the trunk portion rises while the thin portion is sequentially folded on the inner surface of the peripheral wall portion. In this case, the peripheral wall portion of the thick portion needs a certain vertical width. If the vertical width is too long, the width of the thin part will be shortened and it will not be able to be folded back. Also, if the vertical width is too short, it may not be folded back. For example, about 10 mm to 20 mm What is necessary is just to select suitably considering the magnitude | size etc. of an inner container.

  The body of the inner container is preferably substantially the same shape from the lower end to the upper end in consideration of the above-described folding, and the cylindrical peripheral wall can preferably be cylindrical in consideration of the folding. However, other rectangular tube shapes and the like may be used.

  The dispenser is fitted to the upper end of the inner container, and is fitted to the upper end of the cover cylinder in a state where the fitted inner container is stored in the cover cylinder. A known mechanism is used in which the liquid in the inner container is sucked up from the suction port opened at the top of the vessel and ejected from the ejection port of the push-down head. The suction port at the lower end of the dispenser is configured to open at the top in the inner container.

The first means is configured as follows. That is, the inner container B with the neck and neck portion 22 upright at the upper end of the bottomed cylindrical body portion 20, the dispenser C attached with the upper end opening of the inner container B closed, and the upper end of the inner container B stored inside A liquid ejector comprising a self-supporting cover tube A fitted with a dispenser C, and the lower end portion of the barrel peripheral wall 20b and the barrel bottom wall 20a of the inner container B in the thick portion 27, etc. The inner peripheral wall 20b is formed on the flexible thin portion 28, and the entire inner container B is integrally formed of a synthetic resin, and the thin portion is formed on the inner surface of the thick portion 27 of the thick portion 27 as the liquid decreases. The body bottom wall 20a is lifted while 28 is being folded back , and the inner container B is housed in the cover tube A with a gap that prevents the thick portion 27 from being tilted.

  The second means is configured as follows. That is, in the first means, the entire inner container B was integrally formed of synthetic resin by blow molding.

The third means was configured as follows. That is, in the first means or the second means, an annular ridge 26 is projected on the lower surface of the flange 23 projecting from the outer periphery of the mouth neck portion 22 of the inner container B, and The upper end of the cylindrical jig was fitted and the flange portion 23 was placed on the jig so that the inner container B could be supported.

  In the liquid ejector of the present invention, the entire inner container B is formed of a pair of synthetic resins, so there is no risk of liquid leakage from the inner container B, and the structure is simple, so compared to the conventional product. It can be manufactured inexpensively without increasing the special manufacturing cost. Also, as the liquid is reduced, the flexible thin portion 28 is regularly folded and the inner container B is crushed beautifully, so that the amount of waste liquid remaining can be reduced as much as possible, and the ejection efficiency can be reduced. Can be improved.

  Further, when the inner container B is formed by blow molding, if the thickness of the preform is specified in advance according to the size of the inner container B, the predetermined thick portion 27 and the thin portion 28 are simultaneously formed. Therefore, it is possible to manufacture with a stable quality without any deviation in the desired thickness.

  When the inner container B is accommodated in the cover cylinder A with a gap that allows the thick part 27 to be tilted and prevented from being tilted, the bottom of the body part of the thick part 27 that rises as the stored liquid decreases. The wall 20a is not greatly inclined, and as a result, the thin portion 28 can be folded more smoothly.

  An annular ridge 26 is provided on the lower surface of the flange 23 projecting from the outer periphery of the mouth neck portion 22 of the inner container B, and the upper end of a cylindrical jig is fitted on the outer periphery of the annular ridge 26 to be placed on the jig. When the flange portion 23 is placed and the inner container B can be supported, there is an advantage that the dispenser C can be attached to the inner container B more easily.

  Hereinafter, exemplary embodiments will be described embodiment of the present invention with reference to the drawings.

  1 to 5 show an example of the liquid ejector of the present invention. In the figure, 1 denotes a liquid ejector. The liquid ejector 1 includes a cover cylinder A, an inner container B, and a dispenser C.

  The cover cylinder A has a bottomed cylindrical shape with an upper end opening in which the peripheral wall 3 is erected from the periphery of the bottom wall 2 and is made of synthetic resin. Moreover, the rigidity which can maintain the whole standing state in the state which mounted | wore with the inner container B and the dispenser C is provided. Further, a screw 4 is provided around the upper end of the outer periphery, and an outside air introduction hole 5 is provided in the bottom wall 2. The outside air introduction hole 5 is for introducing outside air into the cover cylinder A as the stored liquid decreases, and various attachment locations can be selected.

  The inner container B is in the form of a bottle in which the mouth and neck part 22 is erected from the upper end of the cylindrical body part 20 via the shoulder part 21, and a flange part 23 projects outwardly at the lower outer periphery of the mouth and neck part 22. ing. A locking ridge 24 is provided around the outer periphery of the neck portion 22 above the flange portion 23, and a number of longitudinal ridges 25 are provided vertically along the outer periphery of the neck portion 22 above. The flange portion 23 protrudes outward from the outer periphery of the body portion 20 so that a jig can be mounted on the outer periphery position of the body portion 20, and an annular ridge 26 for fitting the upper end of the jig is formed on the lower surface. It is suspended.

  The body part 20 of the inner container B is composed of a body part bottom wall 20a and a cylindrical body part peripheral wall 20b standing up from the periphery of the body part bottom wall 20a, and a lower end portion of the body part peripheral wall 20b, The bottom wall 20a portion is configured as a thick portion 27, and the other trunk peripheral wall 20b portion is configured as a flexible thin portion 28. As the thickness of the thick portion 27, a thickness that is not easily deformed is adopted as compared with the thin portion 28 that shrinks so as to reduce the internal volume by discharging the stored liquid.

The inner container B is formed by blow molding using a preform 30 as shown in FIGS. The preform 30 is formed by injection molding. The preform 30 includes the above-described flange portion 23, the locking ridge 24, the vertical ridge 25, and the like. The body part forming part 30b is formed in a continuous manner to form the body part 20, and the body part forming part 30b is further composed of a thick part forming part 30b ₁ and a thin part forming part 30b ₂ . . Then, for example, as shown in FIG. 3, first, the body forming portion 30b is pushed downward by the air nozzle 31 and extended, and then air is blown from the air nozzle 31 to inflate the body forming portion 30b in a normal manner to form the body portion 20. To do. If the size of the inner container B and the thickness of the preform 30 are adjusted in advance, the thick portion 27 and the thin portion 28 having a predetermined thickness are formed by blow molding. In FIG. 3, the air nozzle 31 has a plurality of horizontal-axis extending blow holes 33 on the side surface in addition to the blow-out holes 32 at the tip.

Dispenser C includes a cylinder C _1, a vertically movable member C _2, and a mounting cap C _3. Cylinder C ₁ is projected to the outer peripheral flange 40 from the top, the inside bottom and provided with a suction valve 42 using the valve member 41, it is fitted and fixed to an upper end portion to the mounting cap C _3. Further, a short suction pipe 43 is fitted to the lower end of the cylinder C _{1, and} the lower end is opened to the upper part in the inner container B.

The vertically moving member C ₂ includes a piston 50, a stem 51, and a push-down head 52, and is always urged upward by a coil spring 53. The outer periphery of the piston 50 is slidably fitted to the inner circumference of the cylinder C _{1, and} the inner circumference is fitted to the lower outer circumference of the stem 51 so as to move up and down by a predetermined width. A discharge valve 55 is constituted by a valve seat 54 protruding from the lower end portion of the outer surface 51. The upper end of the stem 51 is protruded upward from the central opening of the mounting cap C ₃ through the upper end opening of the cylinder C _1, it is fitted to head 52 depressed at its upper end.

The mounting cap C ₃ connects the first peripheral wall portion 60 having a large diameter at the lower portion and the second peripheral wall portion 61 having a small diameter at the upper portion via a first top plate portion 62 at the lower portion, and further, the second peripheral wall portion 61. A second top plate portion 63 that extends above the upper end edge of the second top plate portion 63 is extended, and a guide tube portion 64 is erected upward from the inner peripheral edge of the second top plate portion 63. In addition, a thread 65 is provided around the inner periphery of the first peripheral wall 60, an engagement protrusion 66 is provided at the lower end of the second peripheral wall 61, and a circumferential direction is provided above the engagement protrusion 66. A number of vertical ridges 67 are provided vertically. Further, a locking protrusion 68 is provided above each vertical protrusion 67 so as to protrude. Then, the mounting cap C ₃ is mounted on the cylinder C ₁ by sandwiching the flange 40 of the cylinder C ₁ between the locking protrusion 68 and the second top plate portion 63.

  Further, when the dispenser C is attached to the inner container B, for example, the upper end of a cylindrical jig is fitted to the outer periphery of the annular protrusion 26 of the flange part 23 and the flange part 23 is placed on the jig. The inner container B is supported, and after the liquid is filled into the inner container B, the dispenser C is plugged from above and attached. At this time, the engaging protrusion 66 of the second peripheral wall portion 61 climbs over and engages with the lower surface of the locking protrusion 24 of the inner container neck 22 to prevent the dispenser C from coming out upward, and the inner container neck Each vertical protrusion 25 of the portion 22 and each vertical protrusion 67 of the second peripheral wall portion 61 are configured to engage with each other to prevent mutual rotation. Next, the inner container B is accommodated in the cover cylinder A, and the screw 65 of the dispenser C is screwed into the screw 4 of the cover cylinder A to integrate them. In the above example, the case where the dispenser is plugged into the inner container is described. However, the dispenser C is screwed to the inner container B, and only the inner container B is replaceable. It is also possible.

When the liquid ejector 1 configured as described above is used, when the push-down head 52 is pressed from the state shown in FIG. 1, the vertically moving member C ₂ is lowered and the inside of the cylinder C ₁ is pressurized, and the discharge valve 55 is turned on. The liquid is spouted from the spout of the opening head. Next, when the pressing of the push-down head 52 is released, the vertical movement member C ₂ is pushed up by the coil spring 53, and the liquid in the inner container B is sucked up through the pipe 43 for suction into the cylinder C ₁ that has become negative pressure. When the liquid in the inner container B is reduced by this operation, the thick portion 27 is guided and raised by the cover cylinder peripheral wall 3, and at this time, the thin portion 28 is deformed so as to be folded back to the inside of the peripheral wall portion of the thick portion 27. As the liquid loss increases, as shown in FIG. 5, the thin portion 28 is sequentially folded on the inner surface of the peripheral wall portion of the thick portion 27.

It is a half sectional view of the present invention liquid ejector. (Example 1) It is a half sectional view of a preform for forming an inner container in the present invention. (Example 1) 1 is a schematic view of a state where a preform for forming an inner container in the present invention is molded. (Example 1) It is a half cross-sectional view of the inner container in the present invention. (Example 1) It is a half sectional view of the state where a part of liquid of the inner container of the liquid ejector of the present invention was ejected. (Example 1)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid ejector A ... Cover pipe | tube 2 ... Bottom wall, 3 ... Perimeter wall, 4 ... Screw thread, 5 ... Outside air introduction hole B ... Inner container
20 ... trunk, 20a ... bottom wall of the trunk, 20b ... peripheral wall of the trunk, 21 ... shoulder, 22 ... mouth and neck,
23 ... Flange, 24 ... Locking ridge, 25 ... Vertical ridge, 26 ... Annular ridge, 27 ... Thick part,
28 ... Thin part, 30 ... Preform, 30a ... Mouth and neck forming part, 30b ... Torso forming part,
30b ₁ ... Thick part forming part, 30b ₂ ... Thick part forming part, 31 ... Air nozzle,
32 ... Blowout hole, 33 ... Horizontal blowout hole C ... Dispenser
C ₁ ... Cylinder
40 ... Flange, 41 ... Valve member, 42 ... Suction valve, 43 ... Pipe for suction
C ₂ ... Vertical movement member
50 ... Piston, 51 ... Stem, 52 ... Push head, 53 ... Coil spring,
54… Valve seat, 55… Discharge valve
C ₃ … mounting cap
60 ... 1st surrounding wall part, 61 ... 2nd surrounding wall part, 62 ... 1st top plate part, 63 ... 2nd top plate part,
64 ... Guide cylinder, 65 ... Screw, 66 ... engaging ridge, 67 ... vertical ridge, 68 ... locking ridge

Claims (3)

An inner container ( B ) with a mouth-and-neck part ( 22 ) upstanding at the upper end of a bottomed cylindrical body ( 20 ) , a dispenser ( C ) with the upper end opening of the inner container ( B ) closed, and an inner container ( B ) is a liquid jetting device including a self-supporting cover cylinder ( A ) in which a dispenser ( C ) is fitted at the upper end and a barrel peripheral wall ( 20b ) of the inner container ( B ) ) And the bottom wall ( 20a ) of the body are formed in the thick part ( 27 ) , and the peripheral wall ( 20b ) of the other part is formed in the flexible thin part ( 28 ) , and the inner container ( B ) The whole is integrally formed of synthetic resin, and the bottom wall ( 20a ) rises as the thin part ( 28 ) is sequentially folded on the inner wall ( 20b ) of the thick part ( 27 ) as the liquid decreases. The inner container (B) is accommodated in the cover cylinder (A) with a gap so that the thick part (27) can be lifted while preventing tilting. Liquid ejector characterized by comprising. The liquid ejector according to claim 1, wherein the inner container ( B ) is integrally formed of a synthetic resin by blow molding. An annular ridge (26) is provided on the lower surface of the flange (23) protruding from the outer periphery of the mouth neck (22) of the inner container (B), and a cylindrical jig is provided on the outer periphery of the annular ridge (26). The liquid ejector according to claim 1 or 2, wherein the upper end is fitted and the flange portion (23) is placed on the jig so as to support the inner container (B) .

Images