JP2023020299A - discharge container - Google Patents

Abstract

To save parts.SOLUTION: A pump 13 includes a stem 23 arranged so as to be movable downward in an upward energized state, a push-down head 24 which is mounted on the stem 23 and has a discharge hole 32 for discharging contents, a cylindrical cylinder 21 into which the stem 23 is inserted, a piston 25 which is linked with a vertical motion of the stem 23 in the cylinder 21, and is fit into an inner peripheral surface of the cylinder 21 so as to be vertically slidable, and an engagement cylinder 26 assembled with the cylinder 21, wherein the engagement cylinder 26 further includes a piston presser 41 which is arranged in the cylinder 21 and regulates separation from the cylinder 21 of the piston 25, an inner cylinder 42 covering the piston presser 41 from radial outside, and an outer cylinder 43 covering the inner cylinder 42 from radial outside, includes a resin spring 45 which is provided between the inner cylinder 42 and the outer cylinder 43 and energizes the stem 23 upward through the push-down head 24, and the piston presser 41, the inner cylinder 42, the outer cylinder 43 and the resin spring 45 are integrally formed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a dispensing container.

Conventionally, as a discharge container, for example, configurations described in Patent Documents 1 and 2 below are known. These discharge containers comprise a container body containing contents and a pump attached to the container body. The pump includes a stem arranged to be movable downward in an upwardly biased state, a push-down head attached to the stem and having a discharge hole for discharging contents, a cylindrical cylinder into which the stem is inserted, and a a piston linked to the vertical movement of the stem and fitted to the inner peripheral surface of the cylinder so as to be vertically slidable.

Japanese Utility Model Laid-Open No. 5-66379 JP-A-11-333337

By the way, the conventional discharge container has room for improvement in terms of reducing the number of parts.

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and an object of the present invention is to reduce parts.

<1> A discharge container according to an aspect of the present invention includes a container body that stores contents, and a pump attached to the container body, and the pump is arranged to be movable downward while being biased upward. a stem attached to the stem, a push-down head attached to the stem and having a discharge hole for discharging the content, a cylindrical cylinder into which the stem is inserted, and a vertical movement of the stem within the cylinder. a piston fitted to the inner peripheral surface of the cylinder so as to be vertically slidable; and an engaging cylinder assembled with the cylinder, wherein the engaging cylinder is arranged in the cylinder and extends from the cylinder. an inner cylinder that covers the piston retainer from the outside in the radial direction; and an outer cylinder that covers the inner cylinder from the outside in the radial direction. a resin spring that is provided between the piston retainer and the cylinder and biases the stem upward via the pressing head, wherein the piston retainer, the inner cylinder, the outer cylinder, and the resin spring are integrally formed. there is

A push head is biased by a resin spring. Therefore, it is possible to reduce the amount of metal and provide an all-resin pump compared to, for example, a case where a metal spring is used as means for urging the push head.
A piston retainer, an inner cylinder, an outer cylinder and a resin spring are integrally formed. Therefore, compared with the case where the resin spring is formed separately from the engaging tube, for example, parts can be saved.

<2> In the discharge container according to <1> above, the push-down head includes a top wall and a hanging wall extending downward from the top wall, and the resin spring abuts the lower end of the hanging wall from below. You may employ|adopt the structure which touches.

A resin spring contacts the lower end of the hanging wall from below. Therefore, the pressing head can be positively urged upward by the resin spring.

<3> In the discharge container according to <1> or <2> above, the engaging tube further includes a bottom wall connecting the lower end of the inner tube and the lower end of the outer tube, and the resin spring comprises the A configuration may be employed in which the piston retainer, the inner cylinder, the outer cylinder, the bottom wall and the resin spring extend upward from the bottom wall and are integrally formed.

A resin spring extends upwardly from the bottom wall. Therefore, the pressing force that the resin spring receives from the pressing head can be reliably received by the bottom wall.

<4> In the discharge container according to <3> above, the resin spring is a plate spring extending from one side to the other side in the circumferential direction as it goes upward, and the bottom wall has the resin spring extending downward. A configuration in which an exposed through hole is formed may be employed.

A through hole is formed in the bottom wall to expose the resin spring downward. Therefore, when the engaging cylinder is injection molded, if an upper mold and a lower mold that are vertically divided into two are adopted as the mold, a part of the lower mold is passed through the through hole and placed above the bottom wall. can be positioned. Therefore, a part (lower surface) of the resin spring can be formed by the lower mold.

<5> The discharge container according to any one of <1> to <4> above employs a configuration further comprising a middle plate slidably fitted upward on the inner peripheral surface of the container body. You may

According to the present invention, the number of parts can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view including the partial side surface of the discharge container which concerns on 1st Embodiment of this invention. FIG. 2 is a top view showing a resin spring in the discharge container shown in FIG. 1 in a state in which the pressing head is seen through; FIG. 4 is a vertical cross-sectional view showing a state in which the pressing head is pressed down in the discharge container shown in FIG. 1; FIG. 6 is a longitudinal sectional view including a partial side surface of a discharge container according to a second embodiment of the present invention; FIG. 5 is a half cross-sectional view of an engagement tube of the discharge container shown in FIG. 4; FIG. 6 is a top view of the engaging tube shown in FIG. 5 , and is a diagram showing portions of the engaging tube other than the resin spring with broken lines.

(First embodiment)
A discharge container 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. The discharge container 10 is suitably used for discharging highly viscous contents. However, there is no restriction on the viscosity of the content.

As shown in FIG. 1, the discharge container 10 includes a container body 11 for containing contents, a middle plate 12 fitted to the inner peripheral surface of the container body 11 so as to be slidable upward, and the container body 11 . a pump 13 attached to the .
In addition, each component of the discharge container 10 is a molded product using a synthetic resin unless otherwise specified.

Hereinafter, the central axis of the container body 11 will be referred to as the container axis O. As shown in FIG. Along the container axis O, the container body 11 side is called the lower side, the pump 13 side is called the upper side, and the direction along the container axis O is called the vertical direction. A direction intersecting (perpendicular to) the container axis O when viewed from above and below is referred to as a radial direction, and a direction rotating around the container axis O is referred to as a circumferential direction. In addition, the inner plate 12 and the pump 13 are arranged coaxially with the container axis O. As shown in FIG.

The container body 11 has a main body 14 and a bottom lid 15 . The main body 14 has a trunk portion 16 , a shoulder portion 17 and a mouth portion 18 . The body 14 is filled with contents. The body portion 16, the shoulder portion 17, and the mouth portion 18 are integrally formed. The bottom lid 15 is fitted inside the lower end of the body portion 16 .
The middle plate 12 is arranged on the bottom lid 15 . The middle plate 12 is fitted in the trunk portion 16 so as to be slidable upward. The middle plate 12 slides upward as the contents in the main body 14 decrease.

The pump 13 includes a cylinder 21, a suction valve 22, a stem 23, a depression head 24, a piston 25, and an engagement cylinder 26.
Cylinder 21 is cylindrical. Cylinder 21 is positioned within mouth 18 . Cylinder 21 is fixed to mouth 18 . The cylinder 21 is provided with a flange 21a protruding radially outward. In the illustrated example, the flange 21 a is provided at the upper end of the cylinder 21 . Flange 21 a is arranged on the upper end of mouth 18 .

The suction valve 22 is arranged at the lower end of the stem 23 . The intake valve 22 opens and closes the lower end opening of the stem 23 . The suction valve 22 sucks the content inside the container body 11 into the cylinder 21 . The intake valve 22 is a check valve. The suction valve 22 allows the content to flow from the container body 11 into the cylinder 21 when the pressure in the cylinder 21 is reduced. The suction valve 22 restricts the content from flowing out of the cylinder 21 into the container body 11 when the inside of the cylinder 21 is pressurized.

The stem 23 is inserted inside the cylinder 21 . The lower end of the stem 23 is located above the lower end of the cylinder 21 . A communicating hole 27 is formed in the stem 23 . The communication hole 27 is arranged in the vertical center of the stem 23 . The communication hole 27 radially penetrates the stem 23 . The communication hole 27 allows the inside of the stem 23 and the inside of the cylinder 21 to communicate with each other. The stem 23 is arranged so as to be able to move downward while being biased upward.
A push head 24 is attached to the stem 23 . The pressing head 24 includes a top wall 28 , a peripheral wall 29 , a hanging tube 30 (hanging wall), a mounting tube 31 and a discharge hole 32 .

The top wall 28 is a plate facing up and down. The top wall 28 is arranged on the container axis.
The peripheral wall 29 , the hanging tube 30 and the mounting tube 31 all extend downward from the top wall 28 . The peripheral wall 29, the hanging tube 30, and the mounting tube 31 are all coaxial with the container axis O. The peripheral wall 29, the hanging tube 30, and the mounting tube 31 have smaller diameters in this order. A peripheral wall 29 extends downward from the outer peripheral edge of the top wall 28 . The mounting cylinder 31 is mounted on the upper end of the stem 23 . The mounting cylinder 31 is fitted to the stem 23 from the outside in the radial direction. The mounting cylinder 31 is arranged inside the upper end of the cylinder 21 .

The discharge hole 32 discharges the contents. The discharge hole 32 communicates with the inside of the stem 23 . The discharge hole 32 discharges the contents that have passed through the stem 23 forward (in a direction that intersects the container axis O).
The piston 25 cooperates with the vertical movement of the stem 23 within the cylinder 21 . The piston 25 is cylindrical. Inside the piston 25, it is arranged in the vertical middle portion of the stem 23 (outside the communication hole 27). The piston 25 is vertically sandwiched between the lower end of the stem 23 and the lower end of the mounting cylinder 31 . The piston 25 is fitted to the inner peripheral surface of the cylinder 21 so as to be vertically slidable.

The engagement cylinder 26 is attached to the cylinder 21 . The engagement tube 26 is in the shape of multiple tubes. The engagement tube 26 includes a piston retainer 41 , an inner tube 42 , an outer tube 43 , a bottom wall 44 and a resin spring 45 . The piston retainer 41, the inner cylinder 42, the outer cylinder 43, the bottom wall 44 and the resin spring 45 are integrally formed. That is, the piston retainer 41, the inner cylinder 42, the outer cylinder 43, the bottom wall 44, and the resin spring 45 constitute the engagement cylinder 26 as a series of moldings. The engaging tube 26 is integrally molded with a resin material injected into a mold.

The piston retainer 41 is arranged inside the cylinder 21 . The piston retainer 41 is cylindrical. The piston retainer 41 is fitted inside the upper end of the cylinder 21 . The piston retainer 41 covers the mounting cylinder 31 from the outside in the radial direction. A lower end of the piston retainer 41 faces the cylinder 21 from above. The piston presser 41 regulates the separation of the piston 25 from the cylinder 21 .

The inner cylinder 42 covers the piston retainer 41 from the outside in the radial direction. The inner cylinder 42 is screwed to the mouth portion 18 . The upper end of the inner cylinder 42 is connected to the upper end of the piston retainer 41 . A lower end of the inner cylinder 42 is positioned on the shoulder portion 17 . The inner cylinder 42 has a smaller diameter than the hanging cylinder 30 .
The outer cylinder 43 covers the inner cylinder 42 from the outside in the radial direction. The lower end of the outer cylinder 43 is connected to the lower end of the inner cylinder 42 . The outer cylinder 43 has a larger diameter than the hanging cylinder 30 . The hanging tube 30 can enter the space between the inner tube 42 and the outer tube 43 . The outer cylinder 43 has a smaller diameter than the peripheral wall 29 . The outer tube 43 can enter the space between the peripheral wall 29 and the hanging tube 30 in the pressing head 24 .

The bottom wall 44 connects the lower end of the inner cylinder 42 and the lower end of the outer cylinder 43 . The bottom wall 44 is annular. A through hole 46 is formed in the bottom wall 44 . The through hole 46 vertically penetrates the bottom wall 44 . As shown in FIG. 2, two through-holes 46 are arranged at intervals in the circumferential direction. The through hole 46 is an elongated hole extending in the circumferential direction. The size of the through hole 46 in the circumferential direction is 1/4 or more and 1/2 or less around the container axis O. As shown in FIG. The through hole 46 exposes the resin spring 45 downward.

A resin spring 45 is provided between the inner cylinder 42 and the outer cylinder 43 . The resin spring 45 urges the stem 23 upward via the pressing head 24 . A resin spring 45 extends upward from the bottom wall 44 . The resin spring 45 is a plate spring extending from one side to the other side in the circumferential direction as it goes upward. A lower end (end on one side in the circumferential direction) of the resin spring 45 is connected to the periphery of the through hole 46 in the bottom wall 44 . The upper end of the resin spring 45 (the end on the other side in the circumferential direction) contacts the lower end of the hanging tube 30 from below. The plan view shape of the resin spring 45 is the same as the plan view shape of the through hole 46 .

When using the discharge container 10, the user first depresses the depressing head 24 as shown in FIG. At this time, the hanging cylinder 30 pushes the resin spring 45 downward against the upward biasing force of the resin spring 45 . Then, the lower end of the mounting cylinder 31 pushes down the piston 25 and the piston 25 descends inside the cylinder 21 . At this time, the content in the cylinder 21 flows through the communication hole 27 , the stem 23 and the mounting cylinder 31 and is discharged from the discharge hole 32 . Backflow of the content in the cylinder 21 into the container body 11 is regulated by the suction valve 22 .

When the user releases the depression of the depression head 24 , the resin spring 45 is restored and deformed to raise the depression head 24 and the stem 23 . At this time, the lower end of the stem 23 supports the piston 25 from below, and the stem 23 and the piston 25 rise together. Then, the pressure inside the cylinder 21 becomes negative, and the suction valve 22 opens. As a result, the contents are sucked into the cylinder 21 . Then, the inside of the container body 11 is decompressed from now on, and the inner plate 12 is raised.

As described above, according to the discharge container 10 according to this embodiment, the pressing head 24 is biased by the resin spring 45 . Therefore, compared with, for example, a case where a metal spring is employed as means for urging the pressing head 24, the amount of metal can be reduced and the pump can be made entirely of resin.
The piston retainer 41, the inner cylinder 42, the outer cylinder 43 and the resin spring 45 are integrally formed. Therefore, compared to the case where the resin spring 45 is formed separately from the engaging tube 26, for example, parts can be saved.

A resin spring 45 contacts the lower end of the hanging tube 30 from below. Therefore, the pressing head 24 can be reliably urged upward by the resin spring 45 .
A resin spring 45 extends upward from the bottom wall 44 . Therefore, the pressing force that the resin spring 45 receives from the pressing head 24 can be reliably received by the bottom wall 44 .

A through hole 46 is formed in the bottom wall 44 to expose the resin spring 45 downward. Therefore, when the engaging cylinder 26 is injection molded, if an upper mold and a lower mold that are vertically divided into two parts are used as the mold, a part of the lower mold is passed through the through hole 46 to the bottom wall 44 . can be positioned above the Therefore, a part (lower surface) of the resin spring 45 can be formed by the lower mold.

(Second embodiment)
A discharge container 50 according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 6. FIG.
In the second embodiment, the same reference numerals are assigned to the same components as in the first embodiment, the description thereof is omitted, and only the different points will be described.

In the discharge container 50 according to this embodiment, the upper end of the cylinder 21 protrudes upward from the mouth portion 18 of the container body 11 . A flange 21 a is provided at the lower end of the cylinder 21 . Flanges 21 a are arranged on mouth 18 and shoulder 17 of container body 11 . A protruding portion 21b protruding upward is provided in the radially central portion of the flange 21a. The projecting portion 21b has a hollow shape that opens downward. The mouth portion 18 is fitted in the projecting portion 21b.

The projecting portion 21b includes a cylindrical small diameter portion 21c, a cylindrical large diameter portion 21d, and a connecting portion 21e connecting the small diameter portion 21c and the large diameter portion 21d. The small-diameter portion 21c is fitted into the mouth portion 18 from the inside in the radial direction. The large-diameter portion 21d is fitted to the mouth portion 18 from the outside in the radial direction. The upper end of the large diameter portion 21d is located above the upper end of the small diameter portion 21c. The connecting portion 21 e is positioned above the mouth portion 18 . The connecting portion 21e connects the upper end of the small diameter portion 21c and the center of the large diameter portion 21d in the vertical direction.

A rising cylinder 51 is provided on the outer peripheral edge of the flange 21a. The rising tube 51 covers the projecting portion 21b from the outside in the radial direction. The upper end of the rising tube 51 is located above the upper end of the projecting portion 21b. An overcap 52 is detachably attached to the upper end of the rising tube 51 . However, the rising tube 51 and the overcap 52 may be omitted.

Further, in this embodiment, the inner cylinder 42 of the engaging cylinder 26 is fitted to the cylinder 21 from the outside in the radial direction. The lower end of the inner cylinder 42 is fitted between the cylinder 21 and the small diameter portion 21c. The size of the outer cylinder 43 in the vertical direction is smaller than the size of the inner cylinder 42 in the vertical direction. The bottom wall 44 connects the vertical center of the inner cylinder 42 and the lower end of the outer cylinder 43 .

As shown in FIGS. 4 and 5 , the bottom wall 44 includes a plate portion 53 and a cylinder portion 54 . The plate portion 53 is annular. The plate portion 53 is positioned on the connecting portion 21e. An inner peripheral edge of the plate portion 53 is connected to the inner cylinder 42 . The tubular portion 54 extends upward from the outer peripheral edge of the plate portion 53 . The cylindrical portion 54 is fitted into the upper end of the large diameter portion 21d. The upper end of the cylindrical portion 54 is located above the upper end of the large diameter portion 21d. The upper end of the cylinder portion 54 is connected to the lower end of the outer cylinder 43 . The through hole 46 is arranged over the plate portion 53 and the tubular portion 54 .

As shown in FIG. 4, the push-down head 24 has ribs 55 instead of the hanging tube 30 . Ribs 55 extend downwardly from top wall 28 . The rib 55 radially connects the peripheral wall 29 and the mounting cylinder 31 . A plurality of ribs 55 are arranged at intervals in the circumferential direction. A resin spring 45 abuts on the lower end of the rib 55 .

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

The number of resin springs 45 may be one, or three or more. The resin spring 45 does not have to be a leaf spring (not have a plate shape).
The resin spring 45 does not have to contact the hanging tube 30 or the rib 55 . For example, the resin spring 45 may directly contact the top wall 28 .

The middle plate 12 may be omitted. In this case, for example, as the container body 11, a double container consisting of an inner container (inner layer, inner bag) and an outer container (outer layer) can be adopted. In the double container, the content is discharged by reducing the volume of only the inner container. In this type of double container, it is necessary to provide an outside air introduction hole or the like in the outer container (for example, mouth, shoulder, body, bottom, etc.).

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiment with well-known constituent elements without departing from the spirit of the present invention, and the modifications described above may be combined as appropriate.

10, 50 Discharge container 11 Container body 12 Middle plate 13 Pump 21 Cylinder 23 Stem 24 Depression head 25 Piston 26 Engagement cylinder 28 Top wall 32 Discharge hole 41 Piston holder 42 Inner cylinder 43 Outer cylinder 44 Bottom wall 45 Resin spring 46 Through hole

Claims (5)

a container body for containing contents;
a pump attached to the container body,
The pump is
a stem arranged to be movable downward in an upward biased state;
a push-down head attached to the stem and having a discharge hole for discharging contents;
a tubular cylinder into which the stem is inserted;
a piston linked to the vertical movement of the stem within the cylinder and fitted to the inner peripheral surface of the cylinder so as to be vertically slidable;
and an engaging cylinder assembled with the cylinder,
The engagement cylinder is
a piston retainer disposed within the cylinder for restricting the piston from being detached from the cylinder;
an inner cylinder that covers the piston retainer from the outside in the radial direction;
an outer cylinder that covers the inner cylinder from the outside in the radial direction,
a resin spring provided between the inner cylinder and the outer cylinder and biasing the stem upward via the pressing head;
The discharge container, wherein the piston retainer, the inner cylinder, the outer cylinder and the resin spring are integrally formed. the hold down head comprises a top wall and a depending wall extending downwardly from the top wall;
2. The discharge container according to claim 1, wherein said resin spring contacts the lower end of said hanging wall from below. The engagement cylinder further comprises a bottom wall connecting the lower end of the inner cylinder and the lower end of the outer cylinder,
The resin spring extends upward from the bottom wall,
3. The discharge container according to claim 1, wherein said piston retainer, said inner cylinder, said outer cylinder, said bottom wall and said resin spring are integrally formed. The resin spring is a plate spring extending from one side to the other side in the circumferential direction as it goes upward,
4. The discharge container according to claim 3, wherein the bottom wall has a through hole through which the resin spring is exposed downward. 5. The discharge container according to any one of claims 1 to 4, further comprising a middle plate slidably fitted upward on the inner peripheral surface of the container body.

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