JPH0647156U - Spout container - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to sufficiently increase the pressure in the pressurizing chamber in a so-called pressure accumulating structure type ejection container. [Structure] A cylinder 11 is provided in a container body 10, and a biasing member 16 biases the cylinder 11 to frictionally engage a second piston 18 with a first piston 17, and the cylinders 11 are stored in series. . The first piston 17 and the second piston 18 form a pressurizing chamber 26 in the cylinder 11. Thus, when the push button 30 is pushed down, the pressure in the pressurizing chamber 26 is increased, and when the pressure is sufficiently increased by the frictional engagement between the first piston 17 and the second piston 18, the frictional engagement is released to release the second pressure. The piston is lowered and the contents in the pressurizing chamber 26 are moved to the nozzle 3
Eject from 0a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spray container for cosmetics, medicines, paintings and the like. More specifically, it relates to a so-called pressure-accumulation structure-type ejection container in which the push button is pushed down to increase the pressure in the pressure chamber of the cylinder, and the increased pressure causes the contents of the pressure chamber to be vigorously ejected from the nozzle of the push button.

[0002]

[Prior art]

 Conventionally, this type of ejection container pushes down the push button 1 from the unused state shown in FIG. 3 to push the first piston 2 and the second piston 3 against the urging member 4 when using, and The stop valve 5 closes the inflow port 3a to increase the pressure in the pressurizing chamber 6. Then, due to the increase in the pressure, the second piston 3 is further pushed down against the biasing member 4 and separated from the first piston 2, so that the ejection passage 7 in the first piston 2 and the pressurizing chamber 6 communicate with each other. Then, the content in the pressurizing chamber 6 is ejected from the nozzle 1a of the push button 1 through the ejection passage 7.

After the ejection, when the push button 1 is released, the urging member 4 pushes up the second piston 3 and pushes it against the first piston 2 to cut off the communication between the ejection passage 7 and the pressurizing chamber 6. At the same time, the first piston 2 and the second piston 3 are pushed up together. Then, at that time, the pressure in the pressurizing chamber 6 dropped, and the check valve 5 was opened to suck up the contents of the container body 8 into the pressurizing chamber 6 from the inflow port 3a.

[0004]

[Problems to be solved by the device]

 However, in the conventional ejection container of this type, when the push button 1 is pushed down and the first piston 2 and the second piston 3 are pushed against the biasing force, as soon as the pressure in the pressurizing chamber 6 rises a little, the second piston Since 3 is separated from the first piston 2, there is a problem that the pressure in the pressurizing chamber 6 cannot be sufficiently increased. Therefore, the ejection force of the contents is weak, and for example, in the case of a drug with a particularly high viscosity as seen in medicines, there was a problem that it could not be ejected as a mist from the nozzle.

Therefore, an object of the present invention is to make it possible to sufficiently increase the pressure in the pressurizing chamber in a so-called pressure accumulating structure type ejection container.

[0006]

[Means for Solving the Problems]

 Therefore, as shown in the following illustrated embodiment, for example, the present invention provides a container main body 10 for storing contents, a cylinder 11 provided with a suction port 14a and provided in the container main body 10, and an ejection passage in the axial center. 17a is provided, and a first piston 17 that is provided in the cylinder 11 by partially projecting from the container body 10 and an inflow port 18c that communicates with the suction port 14a are provided and are continuously connected to the inside of the first piston 17. Together with the cylinder 11, the cylinder 11 is reciprocally movable and receives an outward biasing force to frictionally engage the first piston 17 to close the ejection passage 17a, and the first piston 17 and the cylinder 11 described above. The second piston 18 forming the pressure chamber 26 having the inflow port 18c and the nozzle 30a communicating with the jet passage 17a are provided between the second piston 18 and the first piston 17. When the push button 30 to be attached and the first piston 17 and the second piston 18 are pushed in, the inlet 18c is closed, the pressure in the pressurizing chamber 26 is increased, and the pressure is applied to the first piston 17 and the second piston 18. When the second button 18 is released from the first piston 17 against the biasing force by releasing the frictional engagement with the first piston 17, and when the push button 30 is released, the second piston 18 is released based on the biasing force. 18 is pushed up to frictionally engage with the first piston 17 to block the communication between the ejection passage 17a and the inside of the pressurizing chamber 26, and push down the first piston 17 together with the second piston 18 It is characterized by comprising a check valve 20 for lowering the pressure in the pressurizing chamber 26 and opening the inflow port 18c at that time.

[0007]

[Action]

 According to this invention, when the push button 30 is pushed down and the first piston 17 and the second piston 18 are pushed in against the outward biasing force during use, the check valve 20 closes the inflow port 18c. The pressure in the pressurizing chamber 26 is increased, and the frictional engagement between the first piston 17 and the second piston 18 is released by the pressure, and the ejection passage 17a in the first piston 17 and the pressurizing chamber 26 are communicated with each other. The contents in the pressurizing chamber 26 are vigorously ejected from the nozzle 30a of the push button 30 through the ejection passage 17a. After the ejection, when the hand is released from the push button 30, the second piston 18 is pushed up based on the urging force and frictionally engaged with the first piston 17 to cut off the communication between the ejection passage 17a and the pressure chamber 26, Both the first piston 17 and the second piston 18 are pushed up. At that time, the pressure in the pressurizing chamber 26 decreases, and the check valve 20 is opened to suck up the content of the container body 10 into the pressurizing chamber 26 from the inflow port 18c.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a pump portion in an unused state in a jet container which is an embodiment of the present invention.

Reference numeral 10 in the drawing is a container body. The container body 10 is made of plastic and has a bottle shape, and contains therein contents such as a highly viscous liquid and an emulsion which are not shown.

A pump is attached to the mouth of the container body 10. The pump includes a vertically arranged cylinder 11. The cylinder 11 has stepped portions 11a, 11b, 11c in the middle to form a first cylinder 12 in the upper portion and a second cylinder 13 in the lower portion, and a flange 12b on the outer periphery of the upper end, and an elongated tubular portion at the lower end. 14 is provided. An annular recess 12c is provided on the upper surface of the inner peripheral portion of the flange 12b. Further, a lateral hole 12a penetrating in the radial direction is provided immediately above the stepped portion 10a, and a communication groove 12d is formed on the inner peripheral surface immediately above the stepped portion 11b. Further, in the elongated tubular portion 14, a suction port 14a and a pipe mounting port 14b are provided continuously downward.

Then, the upper end of the suction pipe 15 is inserted into the pipe mounting port 14b so that the suction pipe 15 and the suction port 14b communicate with each other, and the biasing member 16 is inserted into the second cylinder 13. It is inserted and its lower end is placed on the stepped portion 11c.

Then, the first piston 17 and the second piston 18 are put in the cylinder 11. The second piston 18 is provided with a small-diameter shaft portion 18a in the upper portion, and integrally with the second-diameter piston portion 18b in the lower portion. The diameter-expanded tubular portion 18b has an inflow port 18c penetrating to the center hole in the radial direction at the upper end, and a flange-shaped small seal portion 18d at the outer periphery of the lower end. A check valve 20 is openably and closably provided on the outer surface of the inflow port 18c. The check valve 20 is formed of an elastic material in a downward cap shape, and is airtightly attached so as to cover the outer circumference of the upper end portion of the expanded diameter tubular portion 18b.

On the other hand, the first piston 17 has a hollow shaft shape, has an ejection passage 17a at the center of the shaft, and has a flange-shaped enlarged diameter portion 17b at the lower end thereof, and is opened downward at the lower end to form a large diameter. A seal portion 17c is provided. The jet passage 17a is provided with step portions 17d and 17e on the way, and is formed to have a smaller diameter in the upward direction, and a friction engagement portion 17f is formed on the inner surface between the step portions 17d and 17e.

Therefore, the small-diameter shaft portion 18a of the second piston 18 is put into the ejection passage 17a of the first piston 17 and engaged with the friction engagement portion 17f to move the first piston 17 and the second piston 18 up and down. The lower end of the second piston 18 is placed on the upper end of the biasing member 16. Then, the large seal portion 17c of the first piston 17 is pressed against the inner surface of the first cylinder 12 and the small seal portion 18c of the second piston 18 is pressed against the inner surface of the second cylinder 13 to reciprocate, The upper part of the first piston 17 is projected to the outside of the cylinder 11.

On the other hand, a packing 22 is provided on the upper end surface of the first cylinder 12. The packing 22 is formed in a downward cap shape having a flange 22a on the outer periphery of the upper end, and the flange 22a is fitted in the annular recess 12c and is fitted in the upper end of the first cylinder 12. A support member 23 is provided on the packing 22. The supporting member 23 has an inner cylindrical portion 23b concentrically provided at the center of the bottom of the outer cylindrical portion 23a, and a collar 23c provided at the outer periphery of the bottom. Then, the collar 23c is placed on the flange 12b, and the inner cylindrical portion 23b is fitted into the packing 22. As a result, the lower end of the packing 22 is abutted against the upper end of the expanded cylindrical portion 17b of the first piston 17 to push down the first piston 17, the second piston 18 is pushed down by the first piston 17, and The urging member 16 is provided slightly compressed by the two pistons 18. Then, the pressurizing chamber 26 having the inflow port 18c is formed between the first piston 17, the second piston 18, and the cylinder 11.

On the other hand, the flange 23 c of the support member 23 and the flange 12 b of the first cylinder 12 are covered with a holder cap 27. The holder cap 27 has a downward opening and is tightly fitted to the outer periphery of the mouth portion of the container body 10. Then, the outer cylindrical portion 23a of the support member 23 is projected to the outside through the center hole of the upper surface of the holder cap 27.

Further, the inner cylinder portion 23b is loosely passed through to project the upper end portion of the first piston 17 to the outside, and a push button 30 is attached to the upper end thereof to communicate the nozzle 30a with the ejection passage 17a.

In the non-use state, the ejection container engages the upper end portion of the small diameter shaft portion 18a of the second piston 18 with the friction engagement portion 17f of the ejection passage 17a as shown in the drawing. And the upper end of the small-diameter shaft portion 18a is abutted against the step portion 17d in the ejection passage 17a. The check valve 20 closes the inflow port 18c and shuts off the communication between the pressurizing chamber 26 and the inside of the container body 10.

Then, when the ejection container is used, when the push button 30 is pushed down and the first piston 17 and the second piston 18 are both pushed down against the biasing member 16, the pressure in the pressurizing chamber 26 is reduced. Increase. At that time, the pressure in the pressurizing chamber 26 is sufficiently increased by the friction resistance between the first piston 17 and the second piston 18. Thereafter, as shown in FIG. 2, due to the increase in the pressure, the frictional engagement between the first piston 17 and the second piston 18 is released against the biasing member 16. Then, the ejection passage 17a in the first piston 17 is opened, and the contents in the pressure chamber 26 are vigorously ejected from the nozzle 30a of the push button 30 through the ejection passage 17a.

Then, when the push button 30 is pushed to the final stage, the large seal portion 17c of the first piston 17 enters the communication groove 12d, and the pressurizing chamber 26 and the container body 10 pass through the lateral hole 12a. Communicate. Therefore, the pressure in the pressurizing chamber 26 decreases and becomes the same as the atmospheric pressure.

After ejecting, when the push button 30 is released, the second piston 18 is pushed up by the urging member 16, and the upper end of the small diameter shaft portion 18a is engaged with the friction engagement portion 17f to form the ejection passage 17a. close. Then, both the first piston 17 and the second piston 18 are pushed up to return to the state of FIG. At that time, the pressure in the pressurizing chamber 26 decreases, and the check valve 20 is opened in the pressurizing chamber 26 to suck the contents of the container body 10 into the pressurizing chamber 26 from the inflow port 18c.

When the content in the container body 10 is sucked up into the pressurizing chamber 26, outside air is taken into the container body 10 from between the first piston 17 and the inner cylindrical portion 23b through the lateral hole 12a. . Then, the inside of the container body 10 becomes the same as the atmosphere.

[0023]

[Effect of device]

 From the above, according to the present invention, since the first piston and the second piston which are connected to each other are frictionally engaged with each other, when the push button is pushed down, it is possible to sufficiently increase the pressure in the pressurizing chamber by the frictional force. it can. Therefore, even in the case of a drug having a particularly high viscosity such as found in a drug, the drug can be ejected as a mist from the nozzle.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a pump portion in a non-use state in a jet container which is an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the pump portion in its used state.

FIG. 3 is a cross-sectional view of a pump portion in a non-use state in a conventional ejection container.

[Explanation of symbols]

 10 Container Body 11 Cylinder 14a Suction Port 17 First Piston 17a Jet Passage 18 Second Piston 18c Inlet 26 Pressurization Chamber 30 Push Button 30a Nozzle

Claims (1)

[Scope of utility model registration request] 1. A container body for accommodating contents, a cylinder provided with a suction port and provided in the container body, an ejection passage provided at an axial center, and a part of which projects from the container body and provided in the cylinder. A first piston and an inflow port communicating with the suction port are provided, and the first piston is continuously provided inside the first piston so as to be reciprocally movable in the cylinder together with the first piston. A second piston that engages to close the ejection passage and forms a pressurizing chamber having the inflow port between the first piston and the cylinder, and a nozzle that communicates with the ejection passage are provided. A push button to be attached to one piston, and when the first piston and the second piston are pushed in, the inlet is closed, the pressure in the pressurizing chamber is increased, and the pressure causes friction between the first piston and the second piston. Remove the engagement, first depress the second piston against the biasing force
While releasing the piston from the push button,
The second piston is pushed up based on the urging force,
The piston is frictionally engaged to block the communication between the ejection passage and the pressurizing chamber, and the first piston is pushed down together with the second piston to reduce the pressure in the pressurizing chamber, at which time the inlet is opened. Ejection vessel consisting of a check valve and.