JP2002126588A - Pump made entirely of resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of a pump by decreasing the number of component members, to enlarge the application range of contents by forming the pump entirely from resins, and to facilitate the segregated disposal of the pump. SOLUTION: A cylinder 6 into which a cylindrical piston 5 is inserted to be connected to a suction tube 7 at its tip and which is fixed/held in a cap at the other end is arranged. A first valve 8 which closes a passage of the cylinder when a nozzle head 1 is pushed and opens the passage when it is restored to an initial position is installed in the cylinder. A socket 9 which is engaged at its tip part and acts together with the piston 5 is installed in the piston, and a seal part which contacts the inner wall surface of the cylinder slidably and holds a high liquid-tight state and a second valve 96 which opens a passage of the piston only when the nozzle head is pushed are installed in the socket.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push type pump which is attached to the mouth of a relatively large container such as a milky lotion or a shampoo and is suitable for taking out an appropriate amount of contents from the container. The purpose of the present invention is to reduce the amount of waste and to advantageously realize the preservation of the quality of the contents and the simple separation and disposal by using all resin.

[0002]

2. Description of the Related Art In a push type pump, a nozzle head supported by an elastic member such as a spring is pushed in against the elastic force of the nozzle head to pressurize the contents previously sucked into a cylinder and to pressurize the nozzle head. Is discharged from the tip opening of the nozzle head, and the contents of the container are sucked into the cylinder in the process of returning the nozzle head to the initial position.Especially, shampoo and emulsion contained in a large container are removed as necessary. It is indispensable when taking out an appropriate amount.

As a prior art relating to this point, there is known a push dispenser as disclosed in Japanese Patent Application Laid-Open No. Hei 7-144159 in which a nozzle head and a piston are integrally formed of plastic.

[0004] By the way, although the conventional pump as described above has been tried to use all-resin from the viewpoint of simplifying the separation and recovery, it is difficult to increase the number of parts and increase the efficiency of assembly work. When a large load is locally applied to the component, it may be easily damaged, especially
As for members such as springs that elastically support the nozzle head and valves that control the suction and discharge of the contents, metal-made materials that are likely to affect the quality of the contents due to contact with them are often used. Also, it is difficult to separate and collect used containers.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to propose an all-resin pump which can avoid the above-mentioned conventional problems.

[0006]

According to the present invention, the contents in the container are discharged from the tip opening of the nozzle head by repeating the operation of pushing the nozzle head and returning to the initial position before the pushing. An all-resin pump, having a cap that engages the mouth of a container, an elastic member that guides the nozzle head to return to its initial position, and a passage that follows the operation of the nozzle head and leads to the tip opening. A cylindrical piston, and a cylinder inserted into the cylindrical piston and connected to the suction tube at the tip and fixedly held at the cap at the other end. When the nozzle head is pushed into the cylinder, the cylinder passage is closed. A first valve for opening the valve at the time of return to the initial position; A socket which operates together with the piston is disposed, the socket is slidably contacting the inner wall surface of the cylinder to maintain a high liquid-tight state, and a passage for the cylindrical piston only when the nozzle head is pushed. Characterized in that it has a second valve that opens the pump.

In the above construction, the socket is provided integrally with the sealing portion and the second valve, and the second valve is advantageously adapted to open the passage of the cylindrical piston by its own elastic deformation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A valve used to pressurize and discharge contents sucked into a cylinder is integrated with a piston to reduce the number of parts and eliminate the use of metal members.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings. FIG. 1 shows the configuration of a pump according to the present invention. In the figure, reference numeral 1 denotes a nozzle head. The nozzle head 1 has a tip opening 1a for discharging the contents in the container.

Reference numeral 2 denotes a cap which engages with the mouth of the container by means of a screw or the like. Reference numeral 3 denotes a retainer arranged on the upper surface of the cap 2. Reference numeral 4 denotes a retainer which is held by the retainer 3. An elastic member that induces return. The retainer 3 is provided with a stepped portion 3a, which is provided on the outer periphery of the upper end thereof with a rib provided on the inner peripheral surface of the nozzle head 1 to prevent the nozzle head 1 from being pushed, and the outer peripheral surface thereof is provided with the rib. A guide groove 3b which is continuous with the circumferential end of the step portion which is guided and allows the vertical movement of the nozzle head 1 and which extends in the axial direction is provided.
Can be switched between locked and unlocked states. Further, at the upper end of the retainer 3, the ribs 3 c which can be passed over when the ribs move to the respective positions are separated by about 90 ° in the circumferential direction in order to reliably switch between locking and unlocking of the nozzle head 1. (See FIG. 10).

Reference numeral 5 denotes a cylindrical piston that follows the operation of the nozzle head 1 using the inner surface of the retainer 3 as a guide. This cylindrical piston 5 has a passage 5 a leading to the tip opening 1 a of the nozzle head 1. Reference numeral 6 denotes a cylinder for inserting the cylindrical piston 5, and this cylinder 6 is connected at its tip (lower end) to a suction tube 7 for sucking up the contents in the container. Is fixedly held.

Reference numeral 8 denotes a first cylinder arranged on the cylinder 6.
The valve. The first valve 8 is mounted on the cylinder 6 so as to be elastically deformed and move up and down a little while closing the passage 6a when the nozzle head 1 is pushed (when the contents are discharged). While maintaining the state, the passage 6a is opened when returning to the initial position.

Reference numeral 9 denotes a socket which is fitted to the tip of the cylindrical piston 5 and operates together with the cylindrical piston 5. The socket 9 slidably contacts the inner wall surface of the cylinder 6 to maintain a high liquid-tight state and a second valve 9b for opening the passage 5a of the cylindrical piston 5 only when the nozzle head 1 is pushed. Having.

The socket 9 is capable of integrally molding the seal portion 9a and the second valve 9b, and the second valve 9b itself is elastically deformed and the passage of the cylindrical piston 5 is formed. 5a is opened. Reference numeral 10 denotes a hole for preventing negative pressure for avoiding negative pressure.

The nozzle head 1 is moved 90 degrees from its locked position.
In a situation as shown in FIG. 2 in which the nozzle head 1 is rotated and unlocked and pushed in, when the force applied to the nozzle head 1 is removed, the nozzle head 1 is moved together with the piston 5 and the socket 9 by the elastic force of the elastic member 4. It returns to the initial position as shown in FIG.

At this time, the pressure in the cylinder 6 becomes negative,
The contents in the container are sucked by the suction tube 7,
It flows into the cylinder 6 via the first valve 8.

When the nozzle head 1 is completely returned to the initial position, the first valve 8 is kept closed, and a predetermined amount of contents is stored in the cylinder 6.

In this state, when the nozzle head 1 is further pushed in as shown in FIG. 2, the inside of the cylinder 6 is pressurized, the second valve is opened by elastic deformation, and the contents stored in the cylinder 6 are removed by the piston 5. Passage 5a, this passage 5
Then, the ink is discharged to the outside through the tip opening 1a of the nozzle head 1 connected to the nozzle head 1a.

By repeating the above operation a plurality of times as necessary, a proper amount of the contents in the container can be taken out.

FIG. 3 is an external perspective view of the first valve 8, FIG. 4 is an external perspective view of the socket 9, and FIGS.

FIG. 12 shows another example of the pump according to the present invention. In this pump, a retainer 3 for holding an elastic member 4 and a cap 2 are integrally formed so as to hold a cylinder 6 on the inner surface of the cap 2, and this structure has a greater number of parts. Reduction can be achieved. The discharge of the contents is not different from that shown in FIG.

FIG. 13 shows an annular body 11 integrally formed with the outside of the piston 5 and sliding on the inner wall surface of the cylinder 6 to further enhance the sealing performance between the piston 5 and the cylinder 6 and to improve the nozzle head. This is an example in which a holder 12 that surrounds and holds the piston 1 and the piston 5 around them is provided.

The operation of the pump having the above-described structure for discharging the contents in the container is the same as that shown in FIGS. 1 and 12 described above. FIG. 14 shows the appearance of only the piston 5 and a cross section of the main part.

FIG. 15 shows a step 6 a on the inner wall surface of the cylinder 6.
And a step 5b is provided on the outer peripheral surface of the piston 5, and the elastic member 4 is arranged so that an end face is engaged with each of the steps 6a and 5a, and the elastic member 4 is sandwiched from both sides thereof to seal therebetween. This is an example in which a socket 9 and a seal member 13 are provided on the piston 5 in order to enhance the performance.

In this pump, the contents are discharged as shown in FIGS.
2 and FIG. 13 can be discharged, but there is an advantage that the nozzle head 1 can be made extremely compact. FIG. 16 is a partial sectional view of the side surface of the piston 5 shown in FIG.
2 shows a partial cross section of the side surface of the seal member 13. In addition,
Although not shown, in the present invention, the mechanism for locking the nozzle head 1 in the pressed state of the nozzle head 1 can be a well-known locking mechanism such as screwing, and is not limited in this respect.

The pump according to the present invention can be composed entirely of a synthetic resin such as plastic,
Each member can be manufactured by applying a conventional technique such as an injection molding method.

In particular, the first valve and the second valve open and close by utilizing elastic deformation caused by a change in pressure. When the valves are manufactured, reliable operation can be led. It is important to design.

[0028]

According to the present invention, since all of the constituent members can be made of resin, separation and disposal are easy, and in a conventional pump using a metal member, the metal part of the member is in contact with the contents. In such a case, there was a concern that the content would react with the metal and affect the quality of the content. However, the use of all resin eliminates such a concern and significantly expands the range of use of the content.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a configuration of a pump according to the present invention.

FIG. 2 is an explanatory view of an operation procedure of the pump shown in FIG.

FIG. 3 is an external perspective view of a first valve.

FIG. 4 is an external perspective view of a second valve.

FIG. 5 is a view showing a side surface of a cylindrical piston.

FIGS. 6A and 6B are diagrams showing a side surface and a plane of a socket.

FIG. 7 is a view showing a side surface of a second valve.

FIGS. 8 (a), (b) and (c) are diagrams showing a side surface, a plane surface and a bottom surface of a cylinder, respectively.

FIGS. 9A and 9B are diagrams showing a side surface and a plane of an elastic member.

FIGS. 10A and 10B are diagrams showing a side surface and a plane of a retainer.

FIG. 11 is a view showing a side surface of the cap.

FIG. 12 is a view showing another example of the pump according to the present invention.

FIG. 13 is a view showing another example of the pump according to the present invention.

FIG. 14 is a view showing a side surface of a piston.

FIG. 15 is a view showing another example of the pump according to the present invention.

FIG. 16 is a view showing a side surface of a piston in a partial cross section.

FIG. 17 is a diagram showing a side surface of a seal member in a partial cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle head 1a Tip opening 2 Cap 3 Retainer 3a Step 3b Guide groove 3c Ridge 4 Elastic member 5 Cylindrical piston 5a Passage 5b Annular member 6 Cylinder 7 Suction tube 8 First valve 9 Socket 9a Seal member 9b Second Valve 10 Negative pressure prevention hole 11 Annular body 12 Holder 13 Seal member

Claims (2)

[Claims] An all-resin pump for discharging the contents in a container from an opening at a tip end of a nozzle head by repeating an operation of pushing a nozzle head and returning to an initial position before the pushing. A cap that engages with the mouth of the container, an elastic member that guides the nozzle head to return to the initial position, a cylindrical piston that follows the operation of the nozzle head and has a passage leading to the tip opening, and the cylindrical piston A cylinder which is connected to the suction tube at the end and fixedly held at the cap at the other end, and closes the passage of the cylinder when the nozzle head is pushed in, but opens it when returning to the initial position. A first valve that is fitted to the cylindrical piston at a tip end thereof and operates together with the cylindrical piston. A socket for slidably contacting the inner wall surface of the cylinder to maintain a high liquid-tight state, and a socket for opening the passage of the cylindrical piston only when the nozzle head is pushed in. An all-resin pump having two valves. 2. The all-resin according to claim 1, wherein the socket is provided integrally with the sealing portion and the second valve, and the second valve opens the passage of the cylindrical piston by its own elastic deformation. pump.