JPH08151064A - Blowoff device - Google Patents

Abstract

PURPOSE: To prevent the delivery state of contents from fluctuating even if the deformation state of an elastic member varies depending upon the manner in which a depressing button is depressed. CONSTITUTION: An elastic member 38 is provided at a delivery part 36 of a depress button 33. The member 38 is prepared by forming a rubber into one piece and deformably provided through a diaphragm 38b. And the button 33 is depressed to push a piston 20 so that the pressure inside a cylinder chamber 29 is raised thereby to open an open/closure valve 22, leading the contents in the chamber 29 via a flow passage 40 to the deliery part 36 of the button 33, so that the member 38 at the delivery part 36 is deformed, allowing the contents to be discharged to the outside through a gap produced by the deformation of the member 38. In such a blowoff device as described above, a part having a small cross-sectional area 32 is provided midway in the flow passage 40 to regulate the flow to the part 36, preventing the deformation of the member 38 from exceeding a predetermined limit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic or medicinal ejector. Specifically, a pump is attached to the mouth of the container, and when the push button is pushed down, the contents in the cylinder chamber are discharged, and when the push button is released, it is restored to move the contents in the container to the cylinder. It relates to the ejector sucking up into the room.

[0002]

2. Description of the Related Art Conventionally, for example, some cosmetic ejectors have a structure in which a pump P is attached to a container 1 as shown in FIG.

The pump P has a push button 2. The push button 2 is formed by attaching a holder 4 to a button body 3 and covering the holder 4 with an elastic member 6 to form a discharge portion 5.

In use, when the push button 2 of the pump P is pushed down and the piston 7 is pushed in, the pressure in the cylinder chamber 8 is increased to open the on-off valve 9 and the cosmetic cream in the cylinder chamber 8 flows out. Through the discharge part 5 of the push button 2
5, the elastic member 6 was deformed to form a gap 11 between the elastic member 6 and the holder 6, and the contents were discharged to the outside from the discharge port 6a.

[0005]

However, in such a conventional ejector, the deformed state of the elastic member 6 changes depending on whether the push button 2 is pushed down quickly or slowly, for example. There was a problem that the discharge state of the contents changed depending on 10 and the usability was poor.

Therefore, an object of the present invention is to prevent the discharge state of the contents from changing due to the deformation state of the elastic member of the discharge portion being changed by the depression of the push button.

[0007]

Therefore, the present invention provides
For example, as shown in the illustrated embodiment below, the push button 33 is pushed down to push the piston 20 in, the pressure in the cylinder chamber 29 is increased to open the on-off valve 22, and the contents in the cylinder chamber 29 are passed through the outflow passage 40 to the above-mentioned state. In the ejector which guides to the ejection portion 36 of the push button 33, deforms the elastic member 38 of the ejection portion 36 and ejects it to the outside from the gap 41 generated by the deformation, the deformation of the elastic member 38 is not less than a certain value. The small cross-sectional area portion 32 that restricts
It is characterized in that it is provided on the way.

[0008]

In use, when the push button 33 is pushed down and the piston 20 is pushed in, the pressure in the cylinder chamber 29 is increased to open the on-off valve 22, and the contents in the cylinder chamber 29 are pushed down through the outflow passage 40. The button 33 is guided to the ejection portion 36, the elastic member 38 of the ejection portion 36 is deformed, and the elastic member 38 is ejected to the outside through the gap 41 created by the deformation. During use, the flow rate to the discharge portion 36 is regulated by the small cross-sectional area portion 32, and the deformation of the elastic member 38 is limited to a certain degree or more.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part of an ejector according to an embodiment of the present invention when it is not used.

Reference numeral 14 in the drawing is a container. Container 14
Is made of plastic material into a bottle shape,
Although not shown, for example, cosmetic cream is stored inside. Then, at the mouth portion 14a of the container 14, the pump P
Installed.

The pump P includes a cylinder 15. The cylinder 15 is provided with a flange 15a at the upper end and three step portions 15b, 15c, and 15d in the middle to gradually decrease in diameter toward the lower side, and penetrates in the radial direction immediately above the first step portion 15b to extend laterally. A hole 15e is provided, a valve seat 15f having a gradually smaller diameter is provided downward in the step 15d, and a suction port 15g is provided continuously in the lower end.

The outer periphery of the lower end of the cylinder 15 is fitted into the upper end of the suction pipe 16 so that the suction pipe 1 is attached to the cylinder 15.
6 is attached, and the inside of the suction pipe 16 and the inside of the suction port 15g are communicated with each other.

In such a cylinder 15, a ball valve 17 is inserted and placed on the valve seat 15f, and then a return spring 18 is inserted so that its lower end is placed on the step portion 15d. After that, the piston 20 to which the opening / closing valve 22 is attached is inserted into the cylinder 15.

The piston 20 has a piston lower portion 21 and a piston upper portion 23.

The lower part 21 of the piston has an elongated shaft shape,
The enlarged diameter portion 21 is formed at the lower end of the small diameter shaft portion 21a through the step portion 21b.
c is integrally formed.

The on-off valve 22 is formed of an elastic member such as a rubber material into a short cylindrical shape, and an outer valve cylinder 22a and an inner valve cylinder 22b are concentrically and integrally provided. Then, the lower end of the inner valve cylinder 22b is placed on the stepped portion 21c and attached to the piston lower portion 21, and an annular gap 24 is formed between the lower end of the inner valve cylinder 22b and the outer periphery of the small diameter shaft portion 21a.

The piston upper part 23 has a shaft hole 23 at the center.
It is a hollow shaft having a, and a diameter-expanding cylinder portion 23b is integrally formed at the lower end, a diameter-expanding hole portion 23c is formed in the diameter-expanding cylinder portion 23b, and a vertical groove 23d is formed in the lower inner surface of the shaft hole 23a. There will be more than one.

The inner valve cylinder 22b is slidably provided in the enlarged diameter portion 23c of the piston upper portion 23 so as to be slidable, and the upper end portion of the piston lower portion 21 is press-fitted into the lower portion of the shaft hole 23a. Then, the inside of the shaft hole 23a of the piston upper portion 23 and the inside of the enlarged diameter hole portion 23c communicate with each other through the vertical groove 23d.

Therefore, the lower portion of the piston 20 as described above is inserted into the cylinder 15 and the expanded diameter portion 21c is formed.
The lower surface is placed on the return spring 18, the outer valve cylinder 22a of the on-off valve 22 is slidably provided, and the upper end portion of the piston upper portion 23 is provided so as to project upward from the cylinder 15.

The upper end of the cylinder 15 is covered with a screw cap 25. The screw cap 25 has a top portion 25a.
A central hole 25b is provided at the center and the central hole 25b
A short tubular portion 25c is provided under the top portion 25a around b, and an enlarged diameter tubular portion 25 having a larger diameter than the short tubular portion 25c is provided on the top portion 25a.
d are formed concentrically and integrally.

The piston upper part 2 is placed in the center hole 25b.
3, the short cylinder portion 25c is press-fitted into the upper portion of the cylinder 15 through the upper end portion thereof, and the lower end of the short cylinder portion 25c is abutted against the upper end of the outer valve cylinder 22a of the on-off valve 22 to move the piston 20. The return spring 18 is pushed down to be slightly compressed, and the inner surface of the top portion 25a of the screw cap 25 is placed on the flange 15a of the cylinder 15 for engagement. Then, the piston 20 is pushed up by the urging force of the return spring 18 to move the step portion 21b to the inner valve cylinder 22.
The on-off valve 22 is closed by abutting the lower end of b. Then, the cylinder 1 is connected between the on-off valve 22 and the ball valve 17.
5, a cylinder chamber 29 is formed.

Then, at the upper end of the piston upper portion 23,
A tubular member 32 is provided. The tubular member 32 has a cylindrical shape with a top, a small cross-sectional area portion 32 is provided in the center of the top portion 32a, and a tubular portion 32c is provided downward on the outer periphery of the top portion 32a. Then, the cylinder portion 32c is press-fitted into the shaft hole 23a of the piston upper portion 23, and the protrusions and recesses are fitted together so as to prevent the cylinder portion 32c from coming off and attached.

A push button 33 is attached to the upper end of the piston upper portion 23. The push button 33 is a button body 34.
Have. The button body 34 has a small-diameter cylindrical portion 34a and a large-diameter cylindrical portion 34b formed concentrically with each other to form a pipe portion 34c in the radial direction between the upper portions thereof, and the inside of the pipe portion 34c and the small-diameter cylindrical portion 34a. The inner side is connected to form a lateral hole 34d.

One end of the holder 38 is press-fitted and attached to the lateral hole 34d. The holder 37 has a laterally long shaft shape, a small diameter shaft portion 37b is provided at the other end, and a convex portion 37 is provided at the tip thereof.
c is provided, an annular recess 37a is provided on the outer periphery of the intermediate portion, and a center hole 37d is provided inside. And the central hole 37
The inlet 37e of d is provided at one end of the holder 37, and the small diameter shaft portion 3
An outlet 37f is provided in the radial direction of 7b.

The elastic member 38 is integrally formed of a rubber material, and includes a cap portion 38a, a diaphragm portion 38b, and a retaining cylinder portion 38c. The cap portion 38a has a top portion 38d.
The spout 38e is opened in the center of. Diaphragm part 38b
Extends outward from the peripheral edge of the cap portion 38a.
In addition, the hooking tubular portion 38c forms an annular convex portion 38f on the inner peripheral surface.

Then, the cap portion 3 of the elastic member 38.
8a is covered on the small diameter shaft portion 37b of the holder 37, and the annular convex portion 38f is engaged with the annular concave portion 37a so that the holder 3
7 and the diaphragm portion 38
The inner surface of the top portion 38d is urged by the elastic force of b to move the small-diameter shaft portion 3
It is pressed against the tip of 7b, and the convex portion 37c is put in the ejection port 38e.

Therefore, the button body 34, the holder 37, and the elastic member 38 are provided with a discharge portion 36 in the push button 33, and an outflow passage 40 to the discharge portion 36 is formed with a central hole 37d in the holder 37. , The small-diameter cylindrical portion 34 of the button body 34
a, the shaft hole 23a of the piston upper portion 23, and the vertical groove 23d.
And the inside of the enlarged diameter hole portion 23c and the annular gap 24.

Then, the pump P assembled as described above.
Is passed through the suction pipe 16 in the mouth 14a of the container 14 and then the lower part of the pump P is housed in the container 14 and the screw cap 25 is screwed onto the outer periphery of the mouth 14a to be attached to the container 14. Become.

As shown in the figure, when the ejector having the above-mentioned structure is not in use, the inner surface of the top portion 38d of the cap portion 38a is made small by the elastic force of the diaphragm portion 38b.
It is pressed against the tip of b to close the ejection port 38e to prevent the contents from flowing out from the ejection port 38e.

On the other hand, in use, a finger is put on the push button 33 and pushed down against the return spring 18, and the piston 20 is moved to the cylinder 1.
5, the pressure in the cylinder chamber 29 increases, and as shown in FIG. 2, the stepped portion 21b of the piston lower portion 21 separates from the lower end of the inner valve cylinder 22b to open the on-off valve 22, and the inside of the cylinder chamber 29 is closed. And the inside of the outflow passage 40 communicate with each other, while the piston upper portion 23 engages with the upper end of the inner valve cylinder 22b. Then, the content in the cylinder chamber 29 flows out into the annular gap 24, and the flowed out content is guided to the discharge portion 36 through the outflow passage 40. Then, eventually, the small-diameter cylindrical portion 34
When the pressure inside a and the pressure inside the central hole 37d rises to a certain pressure, the diaphragm portion 38b is deformed as shown in the drawing to release the pressing of the cap portion 38a, and the cap portion 3
A gap 41 is formed between 8a and the periphery of the small-diameter shaft portion 37b, the ejection port 38e is opened, and the contents are ejected through the ejection port 38e.

After the ejection, when the hand is released from the push button 33 to release the depression, the push button 33 and the piston 20 are pushed up together by the return spring 18. Then, the stepped portion 21b of the piston lower portion 21 is brought into contact with the lower end of the inner valve cylinder 22b to close the opening / closing valve 22 and disconnect the communication between the inside of the cylinder chamber 29 and the inside of the outflow passage 40. When the cylinder chamber 29 is further pushed up in this state, the inside of the cylinder chamber 29 becomes negative pressure.
Therefore, as shown in FIG. 3, the ball valve 17 is opened and the contents in the container 14 are sucked up through the suction pipe 16 into the cylinder chamber 29. Then, the original state shown in FIG. 1 is restored.

By the way, since the small cross-sectional area portion 32 is provided in the middle of the outflow passage 40, the flow rate of the contents to the discharge portion 36 is regulated by the small cross-sectional area portion 32 when the above-mentioned ejector is used. Therefore, even if the push button 33 is pressed with a strong force, for example, the piston 20 does not move down quickly, and the pump P always operates constantly. Therefore, it is possible to prevent the deformation of the elastic member 38 from being changed by pushing down the push button 33, and to uniformly deform the elastic member 38 to maintain the discharge state of the contents constant.

In the illustrated embodiment described above, a cylindrical member 32, which is a separate member, is attached to the upper end of the piston upper portion 23, and the cylindrical member 32 is provided with a small cross-section area 32b. However, the present invention is not limited to this. For example, the small cross-sectional area portion 32b may be integrally provided at the upper end of the piston upper portion 23, or the small cross-sectional area portion 32 may be provided at another position in the outflow passage 40.
b may be provided.

[0034]

As described above, according to the present invention, since the flow rate of the contents to the discharge portion is regulated by the small cross-sectional area portion, the piston can be operated even when the push button 33 is pressed with a strong force during use. The pump operates constantly at all times without dropping quickly. Therefore, it is possible to prevent the deformation of the elastic member from being changed by pushing down the push button, and to uniformly deform the elastic member to maintain the discharge state of the contents constant.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of an ejector according to an embodiment of the present invention in a non-use state.

FIG. 2 is a vertical sectional view in the middle of its use.

FIG. 3 is a vertical cross-sectional view in the middle of returning the push button after its use.

FIG. 4 is a vertical cross-sectional view of the conventional ejector when not in use.

FIG. 5 is a vertical sectional view of a push button when in use.

[Explanation of symbols]

 20 Piston 22 On-off valve 29 Cylinder chamber 32 Small cross-section area 33 Push button 36 Discharge part 38 Elastic member 40 Outflow passage 41 Gap

Claims (1)

[Claims] 1. A push-down button is pushed down to push in a piston, the pressure in the cylinder chamber is increased to open an on-off valve, and the contents in the cylinder chamber are guided to a discharge part of the push-button through an outflow passage. In the ejector that deforms the elastic member and discharges from the gap generated by the deformation to the outside,
The ejector, wherein a small cross-sectional area portion for restricting the deformation of the elastic member beyond a certain level is provided in the middle of the outflow passage.