JPH0872947A - Delivery container - Google Patents

Abstract

PURPOSE: To reduce a resistance in sliding without deteriorating prevention of side runout of a piston and to reduce a pressing force for the piston by a method wherein slide parts of the piston and a cylindrical part are both projected so as to be, brought into point or linear contact with each other. CONSTITUTION: A cylinder 10 slides downward against the resilient force of a resilient body 9 by pressing a head 16 in the state that a side runout is restricted by ring ribs 20, 21 and that air supplied from a space part 25 formed in the lower part of the cylinder 10 is leaked through each notches 22a. At this time, a valve 13 is opened, and an inner pressure is raised by liquid flowing out to a liquid path of a nozzle member 13 through an inner hole 12 of the cylinder 10. An elastic member 17 is deformed. The liquid is delivered from a delivery port 18. On the other hand, when the pressing of the head 16 is released, the cylinder 10 is slid upward (reset) by the resilient force of the resilient body 9, a valve 7 is opened, liquid is delivered into the inner hole 12 of the cylinder 10 from an inner hole 8 of a piston 5, and a container is prepared for a next use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid discharge container such as a cosmetic emulsion, a hand cream, a foundation, a hair shampoo, a rinse, a mayonnaise, a ketchup and a paint.

[0002]

2. Description of the Related Art As a discharge container utilizing a liquid-tight sliding structure between a piston and a cylinder, the applicant of the present application has previously devised the invention described in Japanese Patent Application No. 4-59476. A piston having an inner hole that communicates with the liquid chamber is provided at the mouth of the container body that has a liquid chamber inside, and a cylinder that has an inner hole that communicates with the discharge port can slide in a liquid-tight manner with respect to the piston. A liquid passage communicating with the discharge port from the liquid chamber, provided that a valve opened when the cylinder slides toward the piston, and A valve that opens when the cylinder slides away from the piston is provided, and between the piston and the cylinder, an elastic repellant that urges the cylinder away from the piston is provided. A body is placed, and by pressing and releasing the pressing portion against the cylinder against the elastic force of the elastic body, the cylinder is slid against the piston and the valve is opened. , The above In the discharge container configured to discharge the liquid in the chamber to the discharge port, the outer peripheral wall of the piston is uniquely provided with an elastic annular portion serving as a hermetically sliding contact portion with the cylinder, and the mouth portion of the cylinder is provided. A cylindrical portion that restricts lateral shake is provided concentrically with the piston and the cylinder, and a lateral shake restricting portion that can contact the outer peripheral wall of the cylinder is provided on the inner peripheral wall of the cylindrical portion in the sliding direction of the cylinder. The position of the lateral vibration restricting portion located in front of the sliding of the cylinder corresponds to the position of the elastic annular portion provided on the piston, and the pressing portion is Is formed as an oblique surface with respect to the sliding direction of.

That is, the cylinder is slidably held by an elastic annular portion provided on the piston and two lateral vibration restricting portions provided on the tubular portion.

[0004]

In the above prior art, although the airtightness of liquid-tight sliding and the lateral runout of the piston can be prevented, the following problems remain. It is the pressing force when the piston is pressed to discharge the liquid from the liquid chamber. The pressing force is a force for sucking up and discharging the liquid in the liquid chamber, a sliding resistance force generated in the elastic annular portion formed in the cylinder and the piston and an annular rib formed in the tubular portion, and the cylinder. The sum of the compressive force of the compressed air in the closed portion formed at the lower part of − and the elastic force of the elastic body for returning the cylinder after the discharge is completed. Here, the force for sucking up and discharging the liquid in the liquid chamber, the sliding resistance force for performing liquid-tight sliding, and the elastic force of the elastic body for returning the cylinder after the completion of the discharge are minimum required. Power. Therefore, the applicant of the present application conducts research and development in order to reduce the sliding resistance force generated between the cylinder and the annular rib and the compression force of the air compressed in the airtight portion formed in the lower portion of the cylinder. It was

[0005]

According to the present invention, a piston having an inner hole communicating with the liquid chamber is provided at the mouth of a container body having a liquid chamber provided therein, and an inner hole communicating with the discharge port is provided. A cylinder is attached to the piston so as to be slidable in a liquid-tight manner, thereby forming a liquid passage communicating from the liquid chamber to the discharge port, provided that the cylinder is attached to the piston in the liquid passage. A valve that opens when sliding in the approaching direction and a valve that opens when sliding in the direction in which the cylinder separates from the piston are provided.
Between the piston and the cylinder, a cylinder-
An elastic body that urges the cylinder in a direction away from the piston, and presses and releases the pressing portion of the cylinder against the elastic force of the elastic body, whereby the cylinder is pushed against the piston. -In the discharge container in which the valve is opened to discharge the liquid in the liquid chamber to the discharge port, an elastic annular portion serving as a hermetically sliding contact portion with the cylinder on the outer peripheral wall of the piston. And a cylindrical portion that restricts lateral deflection of the cylinder is provided concentrically with the piston and the cylinder in the mouth portion, where the inner peripheral wall of the cylindrical portion is in contact with the outer peripheral wall of the cylinder. The lateral vibration restricting portions to be obtained are provided at least at two or more locations different in the sliding direction of the cylinder to form a partially cutout outer peripheral rib in the middle portion of the outer peripheral wall of the cylinder, and above and below the outer peripheral rib. Direction, that is, A plurality of protrusions are formed in the moving direction, of which the protrusions below the outer peripheral rib are brought into contact with and slide on the cylinder-inner peripheral surface, while the protrusions above the outer peripheral rib are The gist is that it is designed to come into contact with and slide against the lateral shake restricting part.

[0006]

[Function] By making the sliding parts of the piston and the cylinder part projecting from each other, point contact or line contact is achieved, and sliding resistance between the piston and the cylinder part is reduced without impairing the side contact of the piston. Further, by forming a partially cut-out outer peripheral rib in the middle portion of the outer peripheral wall of the cylinder, the air in the closed portion formed in the lower portion of the piston is opened to the atmosphere. When the cylinder is molded by injection molding, etc., by forming vertical ribs,
It also prevents the depression (generally referred to as "sink") in the center of the product that occurs during cooling.

[0007]

DETAILED DESCRIPTION An example will be described with reference to the accompanying drawings. The container body 1 contains a soft bag body 3 that forms a liquid chamber 2 therein. Although the inside of the container body 1 may be directly used as the liquid chamber 2,
The use of the soft bag body 3 is an easy means in that it contracts according to the consumption of the liquid to be contained and can prevent the entry of outside air. The soft bag body 3 is attached to the lower peripheral wall surface of the mouth member 4 attached to the opening of the container body 1 by a heat seal so as not to leak liquid.

The mouth member 4 has a piston 5 inside. The illustrated piston 5 is a separate piston body 6 in order to exhibit a proper elasticity and to secure a large diameter.
However, it may be an integrally molded product. A valve 7 is attached to the piston 5 so that it can be opened upward in the drawing. The valve 7 has an inner hole 8 communicating with the liquid chamber 2.
Is the outlet of the liquid from.

A cylinder 10 biased upward in the drawing by an elastic body 9 is attached to the piston 5 so as to be slidable in a liquid-tight manner. The elastic annular portion 11 provided only on the outer peripheral wall of the piston body 6 serves as a hermetically sliding contact portion with the inner peripheral wall of the inner hole 12 of the cylinder 10. Also, the cylinder
Like the valve 7, the valve 10 is provided with a valve 13 that can be opened upward in the drawing. The valve 13 serves as an outlet for the liquid flowing out from the valve 7 to the inner hole 12.

A nozzle body 1 is provided above the cylinder 10.
4 is attached. The illustrated nozzle body 14 is a valve 1
3, a nozzle member 15 having a passage for the liquid coming out of the nozzle 3, a crown 16, and an elastic member 17 sandwiched between the nozzle member 13 and the crown 16. Here, the liquid passage of the nozzle member 15 extends to the vicinity of the end portion, and the elastic member 17 always shields this liquid passage, but the crown 16 has the internal pressure of the liquid passage. The elastic member 17 allows the deformation that opens the liquid passage when the height rises. That is, the liquid passage ends of the nozzle member 15 and the elastic member 17 are the discharge ports 18.

In FIG. 1, the upper surface of the crown 16 which rises to the right is a pressing portion. For example, the container body 1 is grasped and the upper surface of the crown 16 is pressed with a fingertip. Used for. As described above, at this time, the pressing force does not easily match the sliding direction of the cylinder 10 (vertical direction in the drawing), but rather tends to positively cause the cylinder 10 to laterally swing. Therefore, this lateral vibration restricting portion is required, and in the illustrated example, the cylindrical portion 19 which is a mounting portion of the mouth member 4 to the container body 1 is concentric with the piston 5 (piston body 6) and the cylinder 10. age,
Annular ribs 20 and 21 are formed on the inner peripheral wall of the tubular portion 19 at different vertical positions in the drawing. Its annular rib 2
Notches 20a and 21a are partially formed in 0 and 21 in this example at three positions at equal intervals.

Further, an outer peripheral rib 22 is formed in a circumferential shape at an intermediate portion of the outer peripheral wall of the cylinder 10, and the outer peripheral rib 22 is also partially formed with a notch 22a. With the outer peripheral rib 22 as a boundary, the cylindrical portion 1 is provided below.
A plurality of vertical ribs 23 that are in line contact with and slide on the inner wall surface of 9 are formed. On the other hand, above the outer peripheral ribs 22, a plurality of vertical ribs 24, which are slightly lower than the vertical ribs 23, are formed, which are in point contact with the outer peripheral ribs 20 and 21 formed on the inner wall surface of the tubular portion 19 and slide. ing. The cross-sectional shape of the outer peripheral ribs and the vertical ribs is preferably circular as shown in FIG. 6, but may be such that a flat portion is formed at the apex of the rib for convenience of molding. good.

The annular ribs 20 and 21 are formed so as to be sufficiently close to a plurality of vertical ribs 24 formed on the outer peripheral wall of the cylinder 10. That is, it does not hinder the sliding of the cylinder-10, but if the cylinder-10 causes lateral vibration, it is formed so as to be able to contact the outer peripheral wall of the cylinder-10 in the lateral vibration state as small as possible. Has been done. Moreover, the annular rib 21 located relatively downward in the drawing (that is, in front of the sliding of the cylinder 10) is formed at a position corresponding to the formation position of the elastic annular portion 11 provided on the piston body 6.

When the crown 16 is pressed, the lateral vibration is restricted by the annular ribs 20 and 21 and the vertical rib 23, and the air in the space 25 formed in the lower portion of the cylinder 10 is removed. The cylinder 10 slides downward in the drawing against the elastic force of the elastic body 9 in a state where the cylinder 10 leaks from the respective cutout portions 20a and 21a and the notch portion 22a, and at this time, the valve 13 is opened. The liquid that has flowed out of the inner hole 12 of the cylinder 10 into the liquid passage of the nozzle member 15 increases the internal pressure, deforms the elastic member 17 and discharges the liquid from the discharge port 18, and the pressure on the crown 16 is released. Then, the cylinder 10 slides (returns) upward in the drawing by the elastic force of the elastic body 9, and at this time, the valve 7 opens and the internal hole 8 of the piston 5 moves to the internal hole 12 of the cylinder 10. The liquid will come out and be ready for the next use.

Although not shown, various other methods can be used.
For example, the formation positions of the valve 7 and the valve 13 do not necessarily have to match the illustrated positions. The valve 13 is omitted and the discharge port 18
It is also possible to use only the valve formed by the nozzle member 15 and the elastic member 17 in the portion. In addition, there are many ones that exert a valve function even if they do not completely shut off the liquid, and they can also be used. Further, for example, the tubular portion 19 may be provided separately from the mouth member 4, and appropriate members may be appropriately provided separately and integrated. The lateral shake restricting portion formed on the tubular portion 19 may have a shape other than the annular ribs 20 and 21. The inner diameter of the tubular portion 19 may be gradually reduced from the annular rib 21 upward in the drawing, and the upper end edge portion of the inner peripheral wall of the tubular portion 19 may be a lateral shake restricting portion corresponding to the annular rib 20. Further, in this example, the example in which the pressing crown is inclined is given, but this is a particularly effective example, and the present invention is not limited to this, and for example, a flat crown is used. Is also effective.

[0016]

In the discharge container of the present invention, the outer peripheral wall of the piston is provided with only the elastic annular portion which is the sealing sliding contact portion with the cylinder, and the mouth portion is provided with the cylindrical portion for restricting the lateral shake of the cylinder. The cylinder and the cylinder are provided concentrically with each other, and a lateral vibration restricting portion that can contact the outer peripheral wall of the cylinder is provided on the inner peripheral wall of the cylinder portion at least at two or more different sliding directions of the cylinder. -The outer peripheral rib partially cut out is formed in the middle part of the outer peripheral wall of-, and a plurality of protrusions (vertical ribs) are formed in the vertical direction, that is, in the sliding direction from the outer peripheral rib. The protrusion (vertical rib) below the outer peripheral rib is brought into contact with and slides on the inner peripheral surface of the cylinder, while the protrusion (vertical rib) above the outer peripheral rib is brought into contact with the lateral shake restricting portion. Since it came to contact and slide,
It is possible to reduce the sliding resistance between the piston and the tubular portion without impairing the lateral runout of the piston and the liquid-tightness of sliding property between the piston and the cylinder. Therefore, the pressing force of the piston can be reduced. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a discharge container of the present invention.

FIG. 2 is an enlarged view of part B in FIG.

FIG. 3 is a perspective view showing the mouth member of FIG.

FIG. 4 is a perspective view showing the cylinder of FIG. 1.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a cross-sectional view of an essential part showing each rib.

[Explanation of symbols]

 1 Container Main Body 2 Liquid Chamber 3 Soft Bag Body 4 Mouth Member 5 Piston 6 Piston Body 7 Valve 8 Inner Hole 9 Repellent Body 10 Cylinder-11 Elastic Ring Part 12 Inner Hole 13 Valve 14 Nozzle Body 15 Nozzle Member 16 Head Cap 17 Elastic member 18 Discharge port 19 Cylindrical portion 20 Annular rib (horizontal shake restricting portion) 20a Notch portion 21 Annular rib (horizontal shake restricting portion) 21a Notch portion 22 Outer peripheral rib 22a Notch portion 23 Vertical rib 24 Vertical rib 25 Space portion

Claims (1)

[Claims] 1. A piston having an inner hole communicating with the liquid chamber is provided at an opening of a container body having a liquid chamber inside, and a cylinder having an inner hole communicating with the discharge port is provided with respect to the piston. Liquid-tightly mounted so that it can be slid
A liquid passage communicating from the liquid chamber to the discharge port is formed. However, in this liquid passage, a valve that opens when the cylinder slides toward the piston and a cylinder that extends from the piston A valve that opens when sliding in a direction away from the piston is provided, and an elastic body that urges the cylinder away from the piston is arranged between the piston and the cylinder. By pressing and releasing the pressing portion against the cylinder against the elastic force of the repellent body, the cylinder is slid with respect to the piston, the valve is opened, and the liquid in the liquid chamber is removed. In a discharge container configured to discharge to a discharge port, only an elastic annular portion serving as a hermetically sliding contact portion with the cylinder is provided on the outer peripheral wall of the piston, and lateral deflection of the cylinder is restricted at the mouth portion. To the front The cylinder and the cylinder are provided concentrically with each other, and a lateral vibration restricting portion that can contact the outer peripheral wall of the cylinder is provided on the inner peripheral wall of the cylinder portion at least at two or more different sliding directions of the cylinder. -The outer peripheral rib partially cut out is formed in the middle part of the outer peripheral wall, and a plurality of protrusions are formed in the vertical direction from the outer peripheral rib, that is, in the sliding direction. Make the lower protrusion contact and slide on the cylinder inner peripheral surface,
On the other hand, the discharge container is characterized in that a protrusion above the outer peripheral rib is brought into contact with and slides on the lateral shake restricting portion.