JP3382378B2 - Ejector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ejector for cosmetics, medicine, detergents and the like. More specifically, the present invention relates to an ejector for ejecting contents such as a liquid and an emulsion stored in a container body from a nozzle of the push button by pressing down the push button by hand. 2. Description of the Related Art Conventionally, as shown in FIG. 4, for example, a push button 1 is attached to the upper end of a jet pipe 2 and the lower end of the jet pipe 2 is connected to an ejector via an elastic seal valve 3 as shown in FIG. Cylinder 4
The pump P is constructed by blocking the communication between the inside of the cylinder chamber 5 and the inside of the ejection pipe 2 by the elastic seal valve 3, and the pump P is attached to the mouth 6 a of the container body 6. . In use, by pushing down the push button 1, the ejection pipe 2 is pushed into the cylinder 4 against the urging member 7 to increase the pressure in the cylinder chamber 5, and then the elastic seal valve 3 is opened. To eject the contents in the cylinder chamber 5
While the gas is ejected from the nozzle 1a of the push button 1 through the inside, after the ejection, the hand is released from the push button 1 to close the elastic seal valve 3 and push up the ejection pipe 2 by the urging member 7 to push up the ejection pipe 2 inside the cylinder chamber 5. The pressure was reduced, the check valve 8 was opened, and the contents in the container body 6 were sucked into the cylinder chamber 5. However, in such a conventional ejector, the contents remaining in the vicinity of the nozzle 1a after its use gradually flow out over time and the nozzle 1
a There was a problem of dripping from the tip and soiling the container body 6 and its surroundings. Accordingly, an object of the present invention is to prevent the contents remaining in the vicinity of the nozzle from dripping from the tip of the nozzle over time after use in such an ejector. [0006] Therefore, the present invention provides
As shown in the following illustrated embodiment, the push button 24 is
1, the lower end of the ejection pipe 21 is inserted into the cylinder 15 via the elastic seal valve 19, and the elastic seal valve 19 cuts off the communication between the inside of the cylinder chamber 23 and the ejection pipe 21 so that the pump P, the pump P is attached to the mouth 14a of the container body 14, and the push-down button 24 is pressed down to push the ejection pipe 21 against the urging member 18 to increase the pressure in the cylinder chamber 23. The elastic seal valve 19 is pushed open to eject the contents in the cylinder chamber 23 from the nozzle 24a of the push button 24 through the ejection passage 21a in the eject pipe 21. By releasing the hand, the ejection member 21 is pushed up by the urging member 18 to close the elastic seal valve 19 and reduce the pressure in the cylinder chamber 23, thereby opening the check valve 17. In an ejector that sucks up the contents in the container body 14 into the cylinder chamber 23, an inflatable and contractible suction member 20 is attached to the ejection pipe 21 so as to be located in the cylinder chamber 23 and to eject the inside thereof. It is characterized by being connected to the ejection passage 21a of the pipe 21. In use, by pushing down the push button 24 during use, the ejection tube 21 is pushed in against the urging member 18,
The pressure in the cylinder chamber 23 is increased. At that time, the elastic seal valve 19 is opened, and the contents in the cylinder chamber 23 are ejected from the nozzle 24a of the push button 24 through the ejection passage 21a. At that time, the suction member 20 is simultaneously contracted. On the other hand, after the ejection, when the hand is released from the push button 24, the ejection pipe 21 is pushed up by the urging member 18, the elastic seal valve 19 is closed, and the pressure in the cylinder chamber 23 is reduced. At that time, the check valve 17 is opened and the container body 1 is opened.
4 is sucked into the cylinder chamber 23. Simultaneously, at the same time, the contracted suction member 20 is expanded, and a part of the contents remaining in the ejection passage 21a is sucked.
Pull in to the inside. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view of a main part of an ejector according to an embodiment of the present invention when the ejector is not used. Reference numeral 14 in the figure denotes a container body. The container body 14 is made of, for example, a plastic material into a bottle shape, and stores therein contents such as shampoo and hand soap, not shown. And the mouth 14 of the container body
A is provided with a pump P. The pump P has a cylinder 15.
The cylinder 15 is provided with two step portions 15a and 15b on the way to gradually reduce the diameter in the downward direction, is provided with a flange 15d at the upper end, and penetrates in the radial direction immediately below the first step portion 15a to form a lateral hole 15c. And a valve seat 15e, a suction port 15f, and a pipe mounting port 1 having a gradually decreasing diameter in the lower end portion.
5 g are continuously provided. The suction pipe 1 is inserted into the pipe mounting opening 15g.
The upper end of 6 is inserted, and the inside of the suction pipe 16 communicates with the suction port 15f. The lower end of the suction pipe 16 is provided so as to extend near the bottom (not shown) of the container body 10. The ball-shaped check valve 17 is placed in the cylinder 15 and placed on the valve seat 15e, and then the urging member 18 is inserted and its lower end is placed on the step 15b. Thereafter, the ejection pipe 21 to which the elastic seal valve 19 and the suction member 20 are attached is inserted into the cylinder 15. The ejection pipe 21 has a rod-like shape, and has an ejection passage 21a provided at the center of the inside from the upper end to the middle part downwardly, and is provided through the horizontal hole 21b in the radial direction in communication with the ejection passage 21a. A circumferential groove 21c is provided on the outer periphery of the position.
Further, the ejection pipe 21 is provided with a through hole 21d having a small diameter in the axial direction in communication with the ejection passage 21a in a lower portion, and an annular concave portion 21e is opened downward at the lower end surface around the through hole 21d. Provide. The elastic seal valve 19 is formed in a cylindrical shape having a constricted portion 19a inside using an elastic member such as a rubber material. Then, the constricted portion 19a is inserted into the circumferential groove 21c and attached to the ejection pipe 21, and the lateral hole 21b is closed by the constricted portion 19a. On the other hand, the suction member 20 is made of, for example, a synthetic resin material or a rubber material in a thin bag shape, and a thick flange 20a is provided on the outer periphery of the mouth. And the flange 20
a is fitted into the recess 21e and attached to the ejection pipe 21 to communicate the inside of the suction member 20 with the through hole 21d. Thus, the lower end of the ejection pipe 21 inserted into the cylinder 15 is placed on the urging member 18, and the outer periphery of the elastic seal valve 19 is slidably provided against the inner surface of the cylinder 15. The upper end of the jet pipe 21 is projected from the cylinder 15 to the outside. The upper end of the cylinder 15 is covered with a screw cap 22. The screw cap 22 has an inner cylindrical portion 22a concentrically and integrally provided with an upward opening from the top center to the inside, and a center hole 22c provided in the center of the bottom portion 22b.
Then, the inner cylindrical portion 22a is inserted into the upper end portion of the cylinder 15 and the lower end is abutted against the convex portion 21f of the ejection pipe 21,
Eventually, the inner surface of the top of the screw cap 22 is
5 is put on the flange 15d and engaged therewith, and the urging member 18 is maintained in a slightly compressed state via the ejection pipe 21. Thus, a cylinder chamber 23 is formed in the cylinder 15 between the ejection pipe 21 having the elastic seal valve 19 and the suction member 20 and the check valve 17. Thereafter, a push button 24 is attached to the upper end of the jet pipe 21. The push button 24 is provided with a nozzle 24a in a beak shape on the outer periphery, and a cylinder portion 24b is provided downward at the center, and connects the inside of the small-diameter tube portion 24b and the inside of the nozzle 24a by an internal passage 24c. Then, the upper end of the jet pipe 21 is press-fitted into the small-diameter cylindrical portion 24b, and the push button 2 is pressed.
4 and the ejection passage 21a in the ejection pipe 21
And the press button 24 and the ejection pipe 21 are connected. In the pump P described above, after the suction pipe 16 and the cylinder 15 are housed in the container body 14 through the mouth 14a, the pump cap 22
Is screwed to the outer periphery of the mouth 14a. In the non-use state, as shown in the figure, the horizontal hole 21b is closed by the elastic seal valve 19, and the communication between the ejection passage 21a and the cylinder chamber 23 is cut off. The suction port 15f is closed, and the communication between the inside of the cylinder chamber 23 and the inside of the container body 14 is cut off. On the other hand, the outside communicates with the inside of the suction member 20 through the internal passage 24c of the push button 24, the ejection passage 21a in the ejection pipe 21, and the through hole 21d. When using the ejector, the operator pushes the push button 24 and pushes it down against the urging member 17 in the direction indicated by the arrow in FIG.
Is pushed into the container body 14. Then, the pressure in the cylinder chamber 23 increases, and eventually, as shown in FIG. 2, the elastic seal valve 19 is pushed open to send out the contents in the cylinder chamber 23 through the lateral hole 21b into the ejection passage 21a. 24c through the nozzle 24c
Spouts from a. When the pressure in the cylinder chamber 23 becomes higher than the internal pressure of the suction member 20, the suction member 20 contracts. On the other hand, by releasing the push button 24 after the ejection, the ejection pipe 21 is pushed up by the urging member 18 to close the elastic seal valve 19 and reduce the pressure in the cylinder chamber 23. At that time, as shown in FIG.
To open the contents in the container body 14 to the suction pipe 16.
And sucked up into the cylinder chamber 23. Also,
When the pressure in the cylinder chamber 23 becomes lower than the pressure in the suction member 20, the contracted suction member 20 expands, and a part of the contents remaining in the ejection passage 21a is sucked through the through hole 21d. The contents remaining in the vicinity of 24a are drawn into the inside of the push button 24. In the illustrated embodiment, the suction member 20 has a thin bag shape. However, although not shown, the suction member may be formed in a thin bag shape having a bellows on the outer periphery. As described above, according to the present invention, when the contents are ejected and the hand is released from the push button and the push button is returned, the suction member is expanded and remains in the ejection passage. While sucking a part of the contents, the contents remaining near the nozzle are drawn into the inside of the push button, so that the contents can be prevented from dripping from the tip of the nozzle over time, and as a result, the ejector The surrounding area can be prevented from being stained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a main part of an ejector according to an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view showing a state in which the push button is being depressed during use. FIG. 3 is a longitudinal sectional view showing a state in which the push button is being pushed up. FIG. 4 is a longitudinal sectional view of a main part of a conventional ejector. [Description of Signs] 14 Container body 14a Mouth 15 Cylinder 17 Check valve 18 Urging member 19 Elastic seal valve 20 Suction member 21 Spout tube 21a Spout passage 21d Through hole 23 Cylinder chamber 24 Push button P Pump

Claims (1)

(57) [Claims] [Claim 1] A push button is attached to an upper end of an ejection pipe, and a lower end of the ejection pipe is inserted into a cylinder through an elastic seal valve. A pump P is formed by cutting off the communication with the inside of the ejection pipe, and the pump P is attached to the mouth of the container body, and by pushing down the push button, the ejection pipe is pushed against the urging member to push the ejection pipe into the cylinder chamber. The pressure is increased, the elastic seal valve is pushed open, and the contents in the cylinder chamber are ejected from the nozzle of the push button through the ejection passage in the ejection pipe, and after the ejection, the hand is released from the push button. A biasing member pushes up the ejection pipe to close the elastic seal valve, lowers the pressure in the cylinder chamber, opens a check valve, and sucks the contents in the container body into the cylinder chamber. There are, said the jet pipe, fitted with inflatable contractible suction member, while positioned in the cylinder chamber, comprising an internal through jet path and the communication of the jet pipe, the ejector.